Heat exchanger plate and plate heat exchanger

FIELD: heating.

SUBSTANCE: heat exchanging plate for plate heat exchanger contains a heat transfer zone (10) and edge zone (11), extended around the heat transfer zone. The heat exchange plate is a plate with a double wall formed by two adjacent plates, compressed to be contacted with each other. The heat exchange plate contains the sensor (20), which is designed with a possibility of determination, at least, one parameter and output of the parameter-dependent signal, and the sensor has a sensor probe (21), designed to be located between adjacent plates.

EFFECT: improvement of leak detection in plate heat exchangers with the plates with double walls.

18 cl, 9 dwg

 

The technical FIELD TO WHICH the INVENTION RELATES.

The present invention relates to a heat exchanger plate for a plate heat exchanger containing a heat transfer area and the edge area that runs around and outside the zone of heat transfer in this heat exchanger plate is a plate with a double wall formed by two adjacent plates, compressed to be in contact with each other. The invention also relates to a plate heat exchanger, containing a lot of this kind of heat exchanger plates, which are located next to each other with the formation of several first intermediate spaces between the plates for the first environment and several second intermediate spaces between the plates for the second environment.

DESCRIPTION of the PRIOR art,

In plate heat exchangers, where the flow barrier to prevent mixing environments, know the use of plates with a double wall, i.e. plates, each of which contains two adjacent plates, compressed to be in contact with each other. Standard plate double wall provides an additional security barrier, but usually it may be difficult to detect when one of the adjacent plates flows. If the leakage occurs in the mechanical cracks in one of the fitting is their plates, one of the first and second media will fall into the space between adjacent plates, which is very narrow. This medium can flow from the space between adjacent plates down on the floor, under the plate heat exchanger. This may serve as an indication of leakage. However, with this known method it is impossible to determine which heat transfer plates cracked. In addition, the period of time from start to leak detection environment on the floor under some circumstances can be very long.

In the document US-5178207 described heat exchanger of the initially described type. Exchanger plates are plates with a double wall formed by two adjacent plates, compressed to be in contact with each other. In each plate with a double wall between adjacent plates is made of the intermediate element. The intermediate element facilitates the flow of any flowing fluid medium from the plate heat exchanger into the environment, thereby facilitating detection of flowing fluid medium.

In WO 88/03253 and WO 01/16544 described other examples of plate heat exchangers with plates with double walls formed by two adjacent plates, compressed to be in contact with each other.

In US-4903758 described heat exchanger, the which the electrode passes through the plate heat exchanger through the hole in each heat transfer plate.

The INVENTION

The purpose of the present invention is to provide improved detection capabilities, especially leaks in plate heat exchangers containing plates with double walls.

This goal is achieved by using a specific initially exchanger plates, which differs in that the heat exchanger plate includes a sensor configured to determine at least one parameter and issue-specific parameter signal, and the sensor includes a sensor probe, which is made between adjacent plates.

Preferably, at least one of the adjacent plates deformed with the ability to accommodate the sensor probe between adjacent plates, the cavity is made in the vicinity of the probe of the sensor between the sensor probe and the adjacent plates.

Such a sensor may contain or consist of sensor leak detection, temperature sensor, pressure sensor, sensor malfunction, or any other possible sensor.

During operation of the sensor contains a sensor detecting leaks or humidity sensor, the invention can detect a leak in a separate heat exchanger plate. Thus, it will be possible to determine the position of the leak in a plate heat exchanger, which may contain about the Yan a large number of heat exchanger plates. Detection is essentially immediate, that is, as soon as the leakage of one of the adjacent plates will be issued the signal.

Heat exchanger plate may also contain a number of small holes, which pass through the heat exchanging plate and located within the marginal zone. These small holes can form channel holes for filing in the plate heat exchanger and unloading media from the plate heat exchanger containing a heat transfer plate according to the invention. However, the invention is also applicable to plate heat exchangers in which the environment is served in a plate heat exchanger and/or unloaded from a lateral side of the heat exchanger, i.e. parallel to the plane of extension of the heat transfer plates.

According to one variant of the invention, the sensor includes isolation, which isolates the sensor probe from electrical contact with the adjacent plates. This isolation protects the sensor probe from the undesirable influences of the adjacent plates, which may be made of a metal material such as stainless steel, titanium, aluminum, copper, etc. Insulation may contain or be composed of a single layer or a thin layer of polymer.

According to one variant of implementation and the attainment of the sensor probe is made of electrically conductive material in the form of wires, strips or foils. Conductive material may include metal, for example, at least one of the elements Cu, Ag and Al.

According to one variant of the invention, the sensor probe is configured to determine the parameter between the conductive material of the sensor probe and the adjacent plates.

According to one variant of the invention, the parameter contains one of the parameters: capacitance, impedance, electrical resistance and temperature.

Thus, it can be determined capacitance between the conductive material of the sensor probe and the adjacent plates. In the vicinity of the sensor probe has a cavity which is formed when adjacent plates are compressed with each other with placing between the sensor probe.

The inventors realized that the capacitance is changed when a small amount of moisture present in the cavity close to the sensor probe. If there is something on one of the adjacent plates leakage occurs, the environment will be distributed in the space between adjacent plates due to capillary forces. Thus, a certain amount of moisture will be present in the cavity regardless of the position of the sensor probe with respect to leakage. Fluid moisture will change dial kricheskii properties of the cavity between the sensor probe, that is isolated electrically conductive material, and the adjacent plates.

Based on the pilot tests, the inventors have found a very good response when use a thin insulated metal wire in the plate with a double wall with very small quantities of fluid. The minimum detectable leakage will depend on many factors, for example, the capacitance between the electrodes, the location of the electrodes, etc. In the case of insulated wire, which does not cover the entire surface between the plates, the stochastic process of flowing the fluid between the plates can cause the minimum amount of detectable leaks, which will vary from test to test. However, the repeatability for a very small volume is achieved in a laboratory setting.

Capacitance is a measure of the amount of electric charge, which electrodes can be stored at a given voltage between the electrodes. In the space between the electrodes can be placed dielectric, which increases the magnitude of the capacitance. The dielectric is the absolute ideal electrical insulator, which prevents the movement of charges between the two electrodes, resulting in the absence of an electrical current between the electrodes. what, however, the insulator has a resistivity, even if it is very high. As an approximation, the actual electrical equivalence actual/actual capacitance can be thus described as a capacitance in parallel with the resistance due to the resistivity of the dielectric.

The dielectric may also be the frequency-dependent dielectric constant, due to the time lag between electric field and electric polarization in the dielectric. The imaginary part of the frequency-dependent complex dielectric constant is the level of electrical losses and can be considered as a resistance and included in the above mentioned resistance. Then the resistance due to electric charges that can move in the dielectric (electric current), and the frequency-dependent dielectric constant (low loss). Both of these characteristics make up the total resistance between the electrodes and cause frequency-dependent resistance. The real part of the complex dielectric constant directly related to the magnitude of the capacitance itself. Can also be the frequency-dependent dielectric constant of the insulating layer electrodes (if it occurs). Then the level of loss (imaginary part of the dielectric is eskay constant) insulating layer also contributes to the frequency-dependent resistance. The resistance at zero frequency, resistance, DC, is the sum of the resistance due to charge transfer (specific resistance) of different materials between the electrodes (the insulating layer of the electrodes, dielectric material and so on).

If you take pure distilled water, absolutely free from ions, as a dielectric material, the relative dielectric constant is about 80 at low frequency, while the imaginary part (loss) is equal to almost zero. This means that the capacitance will increase when a portion of the space between the electrodes is filled with water. If more water enters the space, the capacitance will be increased. If all space is filled with water, the value of capacitance would be rich.

At high frequencies (in GHz) loss (imaginary part) increases (which affects resistance), the actual part is reduced (which affects self capacitance). If the ions (positive or negative) are present in the water (or other fluid as the dielectric), the ions move in a fluid when an electric field (that is, the voltage of the electrodes in the dielectric. If the electric field depends on BP is like, ions oscillate when moving and affect the frequency-dependent imaginary part of the dielectric constant (low loss), creating a frequency-dependent impedance between the electrodes. This effect increases as the frequency decreases and may be significant in the MHz region or in the range of lower frequency. In other words, the frequency-dependent impedance will be affected when water (or other fluids from the mobile ions) will be present as a dielectric medium.

Thus, measurement of moisture or humidity using the definition of capacitance can be used in sensors, moisture or humidity. Technique for moisture determination is based on measuring the capacitance of the dielectric, which can absorb moisture. Since water, as mentioned above, has a high dielectric constant, the capacitance of the dielectric varies greatly.

The resistance between the conductive material of the sensor probe and the adjacent plates can also be determined. The resistance will decrease, if there is a violation of insulation, and resistance can be thus used to identify such defects. Thus, the position of the heat transfer plate with sensor probe damage in the reservoir is natom the heat exchanger can be determined accordingly.

According to one variant of implementation of the present invention, the sensor probe is located in the area of heat transfer. The sensor probe can be arbitrarily along part of the zone of heat transfer.

According to one variant of implementation of the present invention, the heat exchange plate has a zone of the strip, which continues around the area of heat transfer between the heat transfer area and the edge area and which forms the gasket. Preferably, at least one of the adjacent plates in the zone of the strip contains a recess, continuing along the strip parallel to the edge zone, forming the gap between adjacent plates along the strip, clearance made an additional seal. Such additional gasket is sealing the space between adjacent plates, preventing the penetration of any foreign fluid in the space between adjacent plates. It is preferred, for example, in order to ensure reliable detection of possible leaks. In addition, the sensor probe may be at least partially located in the gap, while the sensor probe is made next to the extra padding towards the area of heat transfer. Any resulting environment will thereby achieving a clearance Sonda sensor. With additional strip will be prevented from entering the sensor probe on the outside of any external fluid medium, such as cleaning solutions, rain water, etc.

The sensor may include two sensor probe. Capacitance between the sensor probe and the adjacent plates can be measured using only one sensor. Using two probes can be measured capacitance between the two probes. Both sensor probe may have the same configuration and can be isolated from the adjacent plates with appropriate insulation.

According to one variant of implementation of the present invention, the sensor continues to the point of connection made in the marginal zone.

According to one variant of implementation of the present invention, the connecting portion of the sensor that goes to the point of connection, has the shape of a wing, at least in the area of the strip. Area strip may contain or be formed as a groove for the strip, continuing around the area of heat transfer for the reception of the strip. Pterygoid form fitting is preferred in order to increase the strength of the connecting part, so that it can withstand the bending required for the passage of the groove for the gasket. The connecting part of the main is entrusted with insulation, which isolates the connecting portion from electrical contact with the adjacent plates.

The other end of the sensor probe can be isolated, for example, using the above-mentioned isolation.

According to one variant of implementation of the present invention, one of the adjacent plates has a cut in the marginal zone, the opening of the connecting part. Such cut or excavation provides connectivity to any relevant contacts or electronic equipment with the connection point and, thus, with probe sensor for the alarm message.

According to one variant of implementation of the present invention, the sensor continues to additional connection point, made in the marginal zone. By performing two connection points, you can determine the resistance of the sensor probe. The resistance of the sensor probe depends on the average temperature along the length of the sensor probe, if it contains a conductive material such as metal. Thus, determination of the resistance of the sensor probe can be used to determine the temperature in the desired position in the heat transfer plate and, consequently, the plate heat exchanger.

According to a variant implementation of the present invention, the heat exchange plate includes a communication module that contains an electronic circuit and communicates with Yes the chick. The probe of the sensor or sensors can be connected directly or connected to the communication module, for example, at the point of connection. The sensor preferably takes place before the join point is executed in the marginal zone, and the communication module can be connected with the connecting part of the sensor at the point of connection. Thus, the communication module can be attached or mounted on the heat exchanger plate. In addition, the sensor continues to made in the marginal zone of the additional connection point, the sensor may contain additional connecting part, and the communication module can be connected to the additional connection part in an additional connection point.

The objective is also achieved by using the initially described plate heat exchanger, which contains a number of heat exchanger plates according to any of the definitions given above, and the heat exchange plates are placed one behind the other with the formation of several first intermediate spaces between the plates for the first environment and several second intermediate spaces between the plates for the second environment. Plate heat exchanger preferably comprises a control unit, configured to receive and generate signals from the probes all of the heat transfer plates, each heat-exchange plate soda is separated by the communication module, which contains an electronic circuit and connected to the sensor, with each communication module comprises a communication bus, which communicates with the control unit.

BRIEF DESCRIPTION of DRAWINGS

Now the present invention will be explained in more detail by describing the various embodiments of the present invention and with reference to the attached drawings.

Figure 1 shows a front view of a plate heat exchanger, containing a number of heat exchanger plates according to a variant implementation of the present invention.

Figure 2 shows a side view of a plate heat exchanger along the line II-II in figure 1.

Figure 3 shows a front view of the heat exchanger plate heat exchanger according to figure 1.

Figure 4 shows a view in section along line IV-IV in figure 3.

Figure 5 shows a view in section of part of a plate heat exchanger of figure 1.

On figa shows a front view of part of the outer region of the heat exchanger.

Figure 6 shows a view in section of heat exchanger plates according to another variant implementation of the present invention.

7 shows a view in section of the heat exchange plate according to an additional variant of implementation of the present invention.

On Fig shows a front view of the heat exchanger plate according to another variant of the process of the present invention.

DETAILED DESCRIPTION of VARIOUS embodiments of the INVENTION

Figure 1 and 2 shows a plate heat exchanger, containing a number of heat exchanger plates 1 forming the plate pack. Exchanger plates 1 are placed one after another with the formation of several first intermediate spaces 2 between the plates for the first environment and several second intermediate space 3 between the plates for the second environment. The first intermediate space 2 between the plates and the second intermediate space 3 between the plates placed in alternating order in the plate pack. Exchanger plates 1 package of plates are pressed together between the frame plate 4 and the presser plate 5 by means of connecting bolts 6. In the described embodiments, implementation of the present invention heat exchanger contains four channel 7 small holes that form the input and output for the first environment and the inlet and outlet for the second medium.

One of the heat exchanger plates 1 are shown in figure 3. Heat exchanger plate 1 contains an area of 10 heat transfer, boundary zone 11, which continues around and outside the heat transfer zone 10 and zone 12 of the strip, which lasts around 10 heat transfer between the heat transfer zone 10 and the edge area 11. The strip 13 is made in the zone 12 of the strip and continue the tsya around, this zone includes 10 heat transfer. In the described embodiments, implementation of the present invention four small holes 14 and made pass through the heat exchanger plate 1. The small holes 14 are located inside and near the marginal zone 11. The small holes 14 are aligned with the channels 7 small holes.

Thus, in the described embodiments, implementation of the present invention, the plate heat exchanger is mounted and held entirely by means of connecting bolts 6 and spacers 13.

However, it should be noted that the invention is applicable also to the plate heat exchangers of other types. Heat transfer plate 1, for example, can be continuously connected to each other by welding such as laser welding or electron beam welding, gluing, or even soldering. An example of an alternative mounting of heat exchanger plates 1 is the so-called semi-welded plate heat exchanger in which heat exchange plates 1 are welded to each other in pairs, which pairs of heat exchanger plates 1 can be pressed to each other by using the connecting bolts with spacers made between pairs. In addition, it should be noted that the plate heat exchanger may not be channels of small holes, through which side plastinates the heat exchanger have holes in the intermediate space 2 and 3 plates for the inlet and exhaust environment. Alternatively, one of the intermediate spaces 2, 3 plates may be accessed through the channels of small holes, while other intermediate space plates can be accessed through the side of the plate heat exchanger.

Heat exchanger plate 1 is a plate with double walls, see figure 4, that is, the heat exchanger plate 1 is formed by two adjoining plates 1A, 1b, clenched to touch each other. The adjoining plates 1A, 1b are made of electrically conductive material, for example, a polymeric material or a metal material such as stainless steel, titanium, aluminum, copper, etc

Heat exchanger plate 1 contains a sensor 20, which is configured to determine at least one parameter and outputting a signal depending on a parameter. The sensor 20 includes a probe sensor 21, which is made between the adjoining plates 1A, 1b, and is located in zone 10 heat transfer. It should be noted here that only near the probe 21 of the sensor part of the plate should be made of electrically conductive material.

The probe 21 of the sensor is preferably located between the adjoining plates 1A and 1b, before they finally mounted or compressed together. Deformation of the material of the adjoining plates 1A, 1b may and the et in connection with compression, so along the probe 21 of the sensor will be serving area, at least one of the adjoining plates 1A and 1b, as can be seen in figure 4. Due to this, there is formed a cavity 22 in the vicinity of the probe 21 of the sensor. The cavity 22 can also be done in advance, i.e. before the sensor 20 and the probe sensor 21 is placed between the plates 1A and 1b. The adjoining plates 1A, 1b can then be compressed together at the first stage. After this, the plates 1A, 1b are separated and one or both of the plates 1A, 1b is deformed to perform the cavity 22 in the associated press tool. Then the sensor 20 and the probe sensor 21 is placed in the cavity 22, after which the plates 1A, 1b shrink with each other.

The cavity 22 is continued along the probe 21 of the probe between the probe sensor 21 and the adjoining plates 1A, 1b. Compression of the adjoining plates 1A, 1b occurs at high pressure, so that remaining between the adjoining plates 1A, 1b space is very narrow, allowing only the movement or distribution of the fluid through capillary forces. However, this distribution will ensure that any of the primary or secondary protection member into the space between the adjoining plates 1A, 1b, will reach the cavity 22.

In order to obtain a sufficient space between the adjoining plates 1A, 1b for capillary forces to allow distribution of the bookmark fluid, one or both plates 1A, 1b facing toward the other plate surface may have a picture or other irregular surface structure, for example, the residual pattern from the sheet material of the plates 1A, 1b. You must understand that this surface structure is very thin, of the order of several microns.

As can be seen in figure 4, the sensor 20 includes insulation 23 which surrounds and insulates the probe 21 of the sensor from electrical contact with the adjoining plates 1A, 1b. The probe sensor 21 is made of electrically conductive material, preferably metal or alloy of metals. In some applications, it is also possible probe 21 of the sensor is made of a semiconductor material. Conductive material, for example, may contain or consist of at least one of the elements: Cu, Ag or Al. The insulation is formed by a layer or a thin layer of polymer. In the described embodiments, implementation of the present invention, the sensor probe is designed as an elongated wire. However, it should be noted that the probe sensor 21 can also have other shapes, such as strip, foil or mesh.

The probe sensor 21 is made in the described embodiments implement the present invention with the ability to determine parameter between the conductive material of the probe sensor 21 and the adjoining plates 1A,1b. In the described embodiments implement the present invention by the argument in the first place, is the capacitance between the conductive material of the probe sensor 21 and the adjoining plates 1A, 1b. The parameter can also be the impedance between the probe sensor 21 and the adjoining plates 1A, 1b. It should be noted that the sensor 20 may include two probe sensor 21 such configuration, located at some distance from each other. When such a layout can be specified between the two probes 21 of the sensor, for example, capacitive resistance.

In the case of cracks, leading to leakage in any of the adjoining plates 1A, 1b, one of the primary and secondary environments can get into the space between the adjoining plates 1A and 1b and distributed to the cavity or cavities 22 through capillary forces. The environment will change the properties of the dielectric between the probe sensor 21 and the adjoining plates 1A, 1b, or between two probes 21 of the sensor, as explained above. Private function probe sensor 21 can also be determined by determining the resistance between the probe sensor 21 and the adjoining plates 1A, 1b. In that case, if the insulation between the probe sensor 21 and the adjoining plates 1A, 1b are broken, the resistance will be greatly reduced, as an indication that breach.

Opisannyh variants of implementation of the present invention, the sensor 20 includes, at least the connecting part 26 connected to the end of the probe 21 of the sensor. The connecting part 26 continues to the point 27 of the connection made in the edge zone 11. The connecting portion 26 may be in the form of a wing, at least in the area of the strip 12. In the described figure 5 embodiment of the present invention the adjoining plates 1A, 1b contain, in the area of the strip 12, recess, passing along a zone 12 of the strip parallel to the edge zone 11. The recess forms the groove of the strip for receiving the strip 13. The connecting portion 26 is bent to repeat deepening, with the passage of the zone 12 of the strip. Due to the shape of the wing connection part 26, its strength increases with the ability to withstand such bending. The connecting part 26 is made of electrically conductive material and provided with insulation of the same kind as the probe 21 of the sensor. It should be noted that the connecting portion 26 may form part of the probe 21 of the sensor. The connecting part 26 can also be done for the sole purpose - to transmit signals between the probe 21 of the sensor and the point 27 of the connection.

You can deepen one 1b of the adjoining plates 1A, 1b deeper than the recess in the other 1A of the adjoining plates 1A, 1b. Thus, a gap 28 between the adjoining plates 1A, 1b, see Fig.6 and 7, dollzone strip 12. In the described figure 6 and 7 variants of implementation of the present invention, an additional gasket 29 is made in the gap 28. Such an additional seal 29 seals the space between the adjoining plates 1A, 1b and ensures that no external liquid cannot penetrate into the space between the adjoining plates 1A and 1b. Such additional gap 28 can also be made in the case, if the zone 12 of the strip 1 from one of the adjoining plates 1A, 1b is flat, and the area 12 of the strip another 1b of the adjoining plates 1A, 1b is made slightly deep.

The connecting portion 26 may receive additional strip 29 or through additional seal 29, smpeg, or for an additional gasket 29.

Alternatively, the probe 21 of the sensor, instead of being made in the area of 10 heat transfer, can be performed or is located at least partially in the gap 28, as illustrated in Fig.7. The probe 21 of the sensor continues along the additional strip 29 and made for an additional gasket 29 in the direction of the heat transfer zone 10. If one of the adjoining plates 1A, 1b, cracked, resulting medium will reach the gap 28 and is made in it of the probe 21 of the sensor. Thanks to the additional strip 29 will be prevented from entering those who UCA environment to the outside of the probe 21 of the sensor in the gap 28.

The sensor 20 may also contain additional connecting part 31 that is connected with the other end of the probe 21 of the sensor. Additional connecting part 31 continues, as illustrated in Fig, up to an additional point 32 connections made in the edge zone 11. This variant implementation of the present invention provides for the determination of the resistance of the probe 21 of the sensor. Since the resistance depends on the temperature, the resistance value can be used to determine the average temperature along the probe sensor 21 for each heat exchanger plate 1. In this case, the probe 21 of the sensor may be a thermocouple element or contain an element of thermocouple to determine the temperature close to one of the sensitive points of thermocouple element.

As can be seen in figure 5-7, one 1A of the adjoining plates 1A, 1b has a cutout 34 in the edge zone 11, the opening of the connecting part 26, and possible additional connecting part 31. Through this cutout 34, the connecting part 26, 31 or the relevant point 27, 32 connections accessible from the outside for connection with a corresponding electronic circuit or the external electronic equipment. Figure 5-7 neckline 34 is made in the edge zone 11, not reaching the edges of the plate 1A. However, the notch 34 may continue from the edge.

According additionally the mu variant implementation of the present invention, each heat exchanger plate includes a module 40 communication, such as the so-called module that contains an electronic circuit and is connected to the sensor 20 or the sensor 20. The module 40 may be, for example, attached to the heat transfer plate 1 in the edge zone 11. The module 40 may be connected to the connecting part 26 at the point 27 of the connection and possibly with an additional connecting part 31 additional connection point 32.

The module 40 has at least one main contact element 41 located on the primary side of the heat transfer plate, and at least one additional contact element 42 located on the opposite additional side heat exchanger plate 1. When the heat transfer plate 1 is compressed with each other, the main contact element 41 will be in electrical contact with the additional contact element 42, as illustrated in figure 5. If the module 40 communication contains only basic contact element 41 and only one additional contact element 42, an additional electrical connection can be done through heat transfer plate 1. The module 40 may also contain two, three or more main contact elements 41 and additional contact elements 42.

Each module 40 communication consists of communications is authorized bus, which communicates with the control unit 43 that contains the processor of any suitable type, see figures 1 and 2. The signals from each probe 21 of the sensor can thus be communicated to the control unit 43 via the corresponding module 40 connected. Thus, the control unit 43 has a capability of sending and receiving signals from the probes 21 of the sensor all heat exchanger plates 1. The control unit 43 may also include a display 44 for displaying information to the user. The control unit 43 may also contain a means for communication with other systems, such as the system of General control or monitoring.

In addition, it should be noted that the elements 26, 31 links may be missing. Thus, the probe 21 of the sensor can be extended with the possibility of direct connection module 40 communication, perhaps through a connection point 27, 32.

The present invention is not limited to the described variants of implementation of the present invention, but may be changed and modified within the scope of the following claims.

1. Plate to plate heat exchanger (1)comprising
(10) heat transfer and
marginal zone (11), which passes around and outside the zone (10) heat transfer
when this plate (1) of the heat exchanger is a plate with a double wall formed by two adjacent plates (1A, 1b, compressed to be in contact with each other,
characterized in that the plate heat exchanger contains a sensor (20)configured to determine at least one parameter and issue depending on the specified parameter of the signal, and the sensor includes a probe (21) of the sensor, which is made between the adjacent plates (1a, 1b).

2. Heat exchanger plate according to claim 1, in which the sensor (20) includes isolation (23), which isolates the probe (21) of the sensor from electrical contact with the adjacent plates (la, lb).

3. Heat exchanger plate according to any one of claims 1 or 2, in which the probe (21) of the sensor is made of electrically conductive material in the form of, at least, wires, strips or foils.

4. Heat exchanger plate according to claim 3, in which the probe (21) of the sensor is arranged to determine a parameter between the conductive material of the probe (21) of the sensor and the adjacent plates (1a, 1b).

5. Heat exchanger plate according to any one of claims 1 or 2, in which the parameter contains one of the parameters: capacitance, impedance, electrical resistance and temperature.

6. Heat exchanger plate according to any one of claims 1 or 2, in which the probe (21) of the sensor is located in the zone (10) of heat transfer.

7. Heat exchanger plate according to any one of claims 1 or 2, containing an area (12) of the strip that runs around the zone (10) heat is peredachi, between the zone (10) heat transfer and the edge area (11)and which forms the gasket (13).

8. Heat exchanger plate according to claim 7, in which at least one of the adjacent plates in the zone of the strip contains a recess, passing along the strip parallel to the edge zone, forming the gap between adjacent plates along the strip, while in the gap provided additional padding.

9. Heat exchanger plate of claim 8, in which the sensor probe at least partially located in the gap, while the sensor probe is made next to the extra padding towards the area of heat transfer.

10. Heat exchanger plate according to any one of claims 1 or 2, in which the sensor (20) goes to the point (27) of the compound made in the marginal zone (11).

11. Heat exchanger plate of claim 10, containing an area (12) of the strip that runs around the zone (10) heat transfer between the zone (10) heat transfer and the edge area (11)and which forms the gasket (13), while the connecting piece (26) of the sensor (20), which runs to a point (27) compounds, has the shape of a wing, at least in the zone (12) of the strip.

12. Heat exchanger plate according to claim 11, in which one of the adjacent plates has a cut-out (34) in the marginal zone (11),
opening the connecting piece (26).

13. Heat exchanger plate according to any one of claims 1 or 2, in which the sensor (0) passes to the secondary connection point, made in the marginal zone (11).

14. Heat exchanger plate according to any one of claims 1 or 2, containing the module (40) communication, which contains an electronic circuit and communicates with the sensor (20).

15. Heat exchanger plate according to 14, in which the sensor (20) goes to the point (27) of the compound made in the marginal zone (11), the module (40) of the connection is connected to the sensor (20) at the point (27) of the connection.

16. Heat exchanger plate according to item 15, in which the sensor (20) goes up for more join points made in the marginal zone (10), the sensor (20) includes an additional connecting part (31), and module (40) of the connection connected with additional connecting part (31) of the additional point (32) of the connection.

17. Plate heat exchanger, containing a number of wafers (1) according to any one of the preceding paragraphs, with the plate (1) heat exchanger placed next to each other with the formation of several first intermediate space (2) between the plates for the first environment and several second intermediate space (3) between the plates for the second environment.

18. The plate heat exchanger according to 17, contains a control unit, configured to receive and process the signal from the probe (21) all sensor plate (1) heat exchanger, with each plate (1) of the heat exchanger contains a module (40)
communication, which contains electronic circuits and communicates with the sensor (20), and with each module (40) of the connection consists of a communication bus, which communicates with the control unit (43).



 

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16 cl, 4 dwg

FIELD: heating systems.

SUBSTANCE: automatic gas heater control device relates to control and monitoring systems. It contains the following parts connected to each other: controller, relay switching panel with electromagnetic relays, voltage converter, terminal plate, and LED indicators with built-in resistors. Controller is connected to LED indicators through the terminal plate. Controller, relay switching panel, and voltage converter are connected to terminals for output.

EFFECT: simplifying the design at maintaining the required functional capabilities.

4 cl, 3 dwg, 1 tbl

Heat exchanger // 2334929

FIELD: heating.

SUBSTANCE: invention is referred to thermal engineering and may be used in district heating systems for heating service water. Heat exchanger contains primary circuit channel located between inlet and outlet connections, secondary circuit channel located between supply pipeline assembly and return pipeline assembly, heat-conducting device between primary circuit channel and secondary circuit channel, and temperature sensor. Temperature sensor is located between secondary circuit channels close to connection with return pipeline. Besides, temperature sensor contacts with heat-conducting device or situates at small distance from it.

EFFECT: space saving in heat exchanger when temperature is measured and good results are achieved.

7 cl, 5 dwg

FIELD: systems for automatic control of technological processes for cooling natural gas with use of apparatus for air cooling, possibly in after-compressing stations of gas fields in northernmost regions for sustaining optimal operation modes of air cooling apparatus for natural gas.

SUBSTANCE: system includes frequency-controlled drive unit; unit for processing measurement information and for automatic control; temperature pickups; electronic unit of temperature pickups; computing unit; two actuating devices; blowers. Signals of temperature pickups are fed through electronic unit to unit for processing measurement information and for automatic control. Said unit for processing measurement information judges (on base of inlet signals) what blowers are to be used and sends respective electric signal to computing unit. With the aid of computing unit one actuating device turns on electric motors of blowers due to their alternative connection with frequency-controlled drive and connects with AC-source electric motors of blowers. Other actuating device controls temperature of walls of heat exchange tubes in all sections of air cooling apparatus of gas and connects with frequency-controlled drive electric motor of blower of that section where temperature of walls of heat exchange tubes differs from preset value. After achieving preset temperature value of walls of heat exchange tubes of selected section, apparatus turns off electric motor of blower from frequency-controlled drive and switches it to AC source. Similar operations may be realized for electric motors of blowers if necessary.

EFFECT: simplified system for automatic control of apparatus for air cooling of natural gas.

1 dwg

FIELD: heating systems.

SUBSTANCE: method comprises control of temperature of at least one of secondary flows of fluid in the secondary circuit which outflows from heat exchanger (1) by means of the primary flow in the primary circuit with the use of control members (5) and (11) that control the primary flow under the action of control unit (7), determining the difference of enthalpies of the primary flow that enters heat exchanger (1) and primary flow that leaves heat exchanger (1), measuring the secondary flow, measuring the flow in the primary circuit, and sending the parameters determined to control unit (7) for control of control members (5) and (11). As a result, the primary flow is controlled by the secondary flow so that the power supplied to the heat exchanger with the primary flow is, in fact, equal to the sum of the power required for the heating of the secondary fluid from the initial current temperature up to the specified outlet temperature, power required for the compensation of energy stored in heat exchanger (1), and power losses from heat exchanger (1). The description of the device for control of water temperature is also presented.

EFFECT: enhanced reliability.

13 cl, 9 dwg

FIELD: heating engineering.

SUBSTANCE: space where surface of condensation locates is brought into communication with steam source and with atmosphere. Heat from surface of condensation is removed to group of individual heat consumers in such a way that heat comes to one group of consumers after another group is supplied with it due to the fact that space where surface of condensation locates is separated to a number of cavities relating in series to each other. The cavities form channel, which communicates steam source with atmosphere. Heat from parts of surface of condensation disposed at different cavities is removed separately each from another to different consumers. Device for realization of the method has vapor source connected with inner cavity of heat-exchange apparatus. The inner cavity communicates with atmosphere. Inner surface of heat-exchange apparatus communicates with atmosphere through internal cavity of at least one more heat-exchange apparatus. Heat-exchange apparatuses are connected with heat agent carriers of different consumers of heat. Internal surfaces of heat-exchanges apparatuses form at least one channel elongated in vertical direction.

EFFECT: selective heat supply from surface of condensation.

4 cl, 3 dwg

The invention relates to the field of water supply and heat and can be used in systems backbone networks water and heating

FIELD: heating engineering.

SUBSTANCE: space where surface of condensation locates is brought into communication with steam source and with atmosphere. Heat from surface of condensation is removed to group of individual heat consumers in such a way that heat comes to one group of consumers after another group is supplied with it due to the fact that space where surface of condensation locates is separated to a number of cavities relating in series to each other. The cavities form channel, which communicates steam source with atmosphere. Heat from parts of surface of condensation disposed at different cavities is removed separately each from another to different consumers. Device for realization of the method has vapor source connected with inner cavity of heat-exchange apparatus. The inner cavity communicates with atmosphere. Inner surface of heat-exchange apparatus communicates with atmosphere through internal cavity of at least one more heat-exchange apparatus. Heat-exchange apparatuses are connected with heat agent carriers of different consumers of heat. Internal surfaces of heat-exchanges apparatuses form at least one channel elongated in vertical direction.

EFFECT: selective heat supply from surface of condensation.

4 cl, 3 dwg

FIELD: heating systems.

SUBSTANCE: method comprises control of temperature of at least one of secondary flows of fluid in the secondary circuit which outflows from heat exchanger (1) by means of the primary flow in the primary circuit with the use of control members (5) and (11) that control the primary flow under the action of control unit (7), determining the difference of enthalpies of the primary flow that enters heat exchanger (1) and primary flow that leaves heat exchanger (1), measuring the secondary flow, measuring the flow in the primary circuit, and sending the parameters determined to control unit (7) for control of control members (5) and (11). As a result, the primary flow is controlled by the secondary flow so that the power supplied to the heat exchanger with the primary flow is, in fact, equal to the sum of the power required for the heating of the secondary fluid from the initial current temperature up to the specified outlet temperature, power required for the compensation of energy stored in heat exchanger (1), and power losses from heat exchanger (1). The description of the device for control of water temperature is also presented.

EFFECT: enhanced reliability.

13 cl, 9 dwg

FIELD: systems for automatic control of technological processes for cooling natural gas with use of apparatus for air cooling, possibly in after-compressing stations of gas fields in northernmost regions for sustaining optimal operation modes of air cooling apparatus for natural gas.

SUBSTANCE: system includes frequency-controlled drive unit; unit for processing measurement information and for automatic control; temperature pickups; electronic unit of temperature pickups; computing unit; two actuating devices; blowers. Signals of temperature pickups are fed through electronic unit to unit for processing measurement information and for automatic control. Said unit for processing measurement information judges (on base of inlet signals) what blowers are to be used and sends respective electric signal to computing unit. With the aid of computing unit one actuating device turns on electric motors of blowers due to their alternative connection with frequency-controlled drive and connects with AC-source electric motors of blowers. Other actuating device controls temperature of walls of heat exchange tubes in all sections of air cooling apparatus of gas and connects with frequency-controlled drive electric motor of blower of that section where temperature of walls of heat exchange tubes differs from preset value. After achieving preset temperature value of walls of heat exchange tubes of selected section, apparatus turns off electric motor of blower from frequency-controlled drive and switches it to AC source. Similar operations may be realized for electric motors of blowers if necessary.

EFFECT: simplified system for automatic control of apparatus for air cooling of natural gas.

1 dwg

Heat exchanger // 2334929

FIELD: heating.

SUBSTANCE: invention is referred to thermal engineering and may be used in district heating systems for heating service water. Heat exchanger contains primary circuit channel located between inlet and outlet connections, secondary circuit channel located between supply pipeline assembly and return pipeline assembly, heat-conducting device between primary circuit channel and secondary circuit channel, and temperature sensor. Temperature sensor is located between secondary circuit channels close to connection with return pipeline. Besides, temperature sensor contacts with heat-conducting device or situates at small distance from it.

EFFECT: space saving in heat exchanger when temperature is measured and good results are achieved.

7 cl, 5 dwg

FIELD: heating systems.

SUBSTANCE: automatic gas heater control device relates to control and monitoring systems. It contains the following parts connected to each other: controller, relay switching panel with electromagnetic relays, voltage converter, terminal plate, and LED indicators with built-in resistors. Controller is connected to LED indicators through the terminal plate. Controller, relay switching panel, and voltage converter are connected to terminals for output.

EFFECT: simplifying the design at maintaining the required functional capabilities.

4 cl, 3 dwg, 1 tbl

Heat exchanger // 2363904

FIELD: heat engineering.

SUBSTANCE: invention relates to heat engineering, particularly to heat exchangers and can be used in heat exchanging or heat-transmitting devices. Heat exchanger with case, which allows primary inlet connection, primary exhaust connection, repeated inlet connection and repeated exhaust connection, between primary inlet connection and primary exhaust connection it is located primary flow path of primary side, and between repeated inlet connection and repeated exhaust connection it is located repeated flow path of repeated side, herewith primary flow path is in condition of heat exchange with repeated flow path.

EFFECT: improvement of heat exchanger parametres, achieved ensured by auxiliary control unit passes through the intermediate space, located between primary flow path and in repeated flow path.

16 cl, 4 dwg

FIELD: heating.

SUBSTANCE: during adjustment of a sealing gap depending on temperature between a movable seal and a rotary rotor of a regenerative heat exchanger, at least one adjustment device is used, comprising several rod elements, due to interaction of which with each other sliding adjustment of the seal is developed, at the same time at least two of these rod elements are controlled separately via according chambers with the help of a control medium of alternating temperature, so that these rod elements are exposed to different temperatures. The invention also relates to a regenerative heat exchanger, where such an adjustment device may be used, and the method to adjust sealing gaps.

EFFECT: development of a simple automatic and cheap method to adjust the seal in the regenerative heat exchanger.

25 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: heat exchanger system through which the liquid flows comprises a heat exchanger with liquid inlet and outlet, a bypass valve with liquid inlet and outlet and a self-cleaning filter with a liquid inlet and two liquid outlets; one of the latter is meant for the filtered liquid and the other - for the unfiltered liquid. The filtered liquid outlet is connected to the heat exchanger inlet and the unfiltered liquid outlet - to the valve inlet, the heat exchanger outlet is connected downstream regarding the valve outlet.

EFFECT: heat exchanger clogging up is excluded.

9 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: automatic keeping of a heat carrier temperature inside a tube within the specified range is performed. A liquid-and-gas tube-and-shell heat exchanger with an automatic control system for the heat exchange process control comprises a casing from two concentrically set cylinders with heat exchanging tubes installed in-between, the upper part of the central tube is fitted with a gas damper with the output end of its axis being connected to a drive mechanism which is presented as a lever coupled with a heat controller by a rod.

EFFECT: development of design for a tube-and-shell liquid-and-gas heat exchanger with automatic control.

4 dwg

FIELD: heating.

SUBSTANCE: heat exchanging plate for plate heat exchanger contains a heat transfer zone (10) and edge zone (11), extended around the heat transfer zone. The heat exchange plate is a plate with a double wall formed by two adjacent plates, compressed to be contacted with each other. The heat exchange plate contains the sensor (20), which is designed with a possibility of determination, at least, one parameter and output of the parameter-dependent signal, and the sensor has a sensor probe (21), designed to be located between adjacent plates.

EFFECT: improvement of leak detection in plate heat exchangers with the plates with double walls.

18 cl, 9 dwg

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