Refrigerating device and evaporator for it
SUBSTANCE: group of inventions relates to a refrigerating device and to the evaporator used in such a refrigerating device. The evaporator for a refrigerating device comprises a pipe through which the refrigerant passes. The said evaporator comprises at least one bearing plate on which the pipe is fixed. Between the pipe and the bearing plate a heat-distributing layer is located. The heat-distributing layer is graphitiferous. Also a refrigerating device is disclosed.
EFFECT: group of inventions is aimed at providing good heat exchange between the pipe and the bearing plate, increasing efficiency.
15 cl, 6 dwg
The technical field
This invention relates to refrigerating apparatus, in particular a domestic refrigeration device, and the evaporator used in this refrigeration apparatus.
The level of technology
This evaporator comprises generally a pipe in which the refrigerant circulates, a support plate, on which are fixed the pipe and through which the heat exchange between the pipe and one of the cooled evaporator cavity devices for cooling, and a heat-distributing layer, located between the pipe and the ground, which promotes efficient heat transfer between the base and the handset.
From patent document DE 202005000909 U1 known evaporator of this type, in which the carrier plate is a formed in the inner chamber of the refrigerating apparatus tub freezers, around which is wrapped the pipe. Possible location between the pipe and the tub freezer metal plates as the heat distribution layer. If the contact surface of a metal plate with a bath freezer is great, it creates a good thermal coupling pipe freezer. However, it is heavy and the road.
Several less costly solution - stick aluminum foil with a thickness of 30 μm on the outer surface of the bath freezer is, to wrap around her pipe and glue. If the adhesive layer that secures the tube in aluminum foil, thin enough, then reached thermal conductivity of the evaporator, it is sufficient for the demands of practice. However, this thin layer of glue not always reliably implement. Fluctuations in the plasticity of the pipe can cause the individual coils of pipe is not pressed to the aluminum foil quite closely, so between them and the pipe remains an air gap or formed a thick layer of adhesive substantially impede heat transfer. Aluminum foil is cheaper than the metal plate, but nevertheless there is a need for a more cost effective solution that reliably provide good heat transfer between the pipe and the support plate.
Disclosure of inventions
The objective of this invention is to provide such an evaporator for refrigerating apparatus, which, while keeping costs at least equivalent to conventional evaporator for its thermal qualities.
The problem is solved due to the fact that in the evaporator for refrigerating apparatus with a tube through which refrigerant passes, at least one support plate, on which the reinforced pipe, and a heat-distributing layer located between the pipe and the support plate, replaceparameters the second layer contains graphite. thermal conductivity of graphite is higher than thermal conductivity of many metals, and is only slightly lower than that of aluminum, at a much lower cost. Therefore, the thickness of the layer or film of graphite, which is only slightly larger than the thickness of aluminum foil, enough to get the evaporator heat transfer rate which is at least as great as in the case of conventional evaporator of the type indicated above, which have the same size.
The proportion of graphite in the heat distribution layer should preferably contain at least 100 mg/cm2better still at least 200 mg/cm2with a thick layer of pure graphite, respectively, in 50 or 100 micrometers. A layer of graphite such thickness can easily reach the heat transfer coefficient of 0.4 W/m2·K.
In accordance with the first embodiment of the invention a heat-distributing layer comprises a film of essentially pure graphite. Essentially pure from the point of view of the present invention, a layer of graphite can be considered, if possible impurities do not affect the conductivity of the layer.
Because pure graphite is very soft, a film made of pure graphite is difficult to use. In accordance with the second embodiment heat-distributing layer may contain a film of synthetic material, with graphite filler. Hot is similar synthetic film should generally be thicker than pure graphite film to achieve the same thermal conductivity, but its advantage lies in the greater ease of its use. The film can be macroscopically homogeneous structure with the graphite particles included in a synthetic matrix, or multi-layered structure with a layer of graphite sandwiched between synthetic layers.
In accordance with the third embodiment as a heat distribution layer is treated graphite-bearing plate of synthetic material.
It is also possible to combine into one evaporator of the three aforementioned variants, as described in more detail below.
The advantage of pure graphite in its elasticity, which ensures that when the pipe to push the layer of graphite deepening and thus establish a close thermal contact between the pipe and the heat-distributing layer on a much larger surface than would be possible in the normal case, between the pipe and the metal plate or metal foil pasted on a larger plate. Such deepening is easy to form in the film of plastic with graphite filler, as this film is, in General, be more elastic, the higher the proportion of graphite in it. In the case of containing synthetic graphite plate has the ability to advance the e to form such a recess in the plate, in order to invest in a pipe.
Due to their relatively high in comparison with the films of the stiffening plate of plastic can also be attached to the pipe protrusions that provide a tight thermal contact between the plate of plastic pipe.
These protrusions preferably are in pairs facing each other concave side surfaces, which are inserted in the pipe.
To create a large contact surface for efficient heat transfer, the tabs should be implemented in the form of ribs running along a pipe.
You can perform carrier plate forming a wall of the refrigerating chamber or the freezing chamber of the refrigerating apparatus according to the invention.
If at least two walls of the freezer are bearing plate heat exchanger, the layer of replacespaces on the first of these walls may include synthetic graphite-containing plate, and the second wall film.
Due to the higher compared to film the load capacity of a synthetic plate you can pipe location on the first wall with a tighter fit than the second.
The first wall is preferably the rear wall or bottom freezer. If the rear wall is advisable to use synthetic plate, that is how there is less practical to fix the pipe, winding it around the freezer. In the bottom, it is possible, it is desirable to lay the pipe more tightly, to allow more high cooling capacity for fast freezing laid on the storage of refrigerated products.
The invention is, of course, also applicable to the evaporator, the carrier plate which is freely located in the inner space of the refrigerating apparatus.
A brief commentary on drawings
Further characteristics and advantages of the invention follow from the following description of embodiments referring to the attached figures. They show the following:
|figure 1||a schematic cross-section household refrigeration apparatus according to the first embodiment of the invention;|
|figure 2||a schematic cross-section of the refrigeration apparatus in accordance with the second embodiment of the invention;|
|figure 3||partial incision freezer refrigeration apparatus with figure 1 or figure 2, is shown not to scale;|
|figure 4||incision of the walls of the freezer;|
|the cut wall of the freezing chamber in accordance with another|
|figure 6||schematic axonometric image of the inner container freezer|
with the evaporator according to the invention.
The implementation of the invention
Figure 1 shows a section of a combined household refrigeration apparatus with a housing 1, a conventional refrigerating chamber 2 freezer 3 and 4 door, 5 for closing the chambers 2, 3. Camera 2, 3 in a known manner distinct from that of the surrounding layer of insulation material through the inner chamber, is created by means of deep drawing. Each of the internal chambers has the shape of a box with the front part open, respectively, toward the doors 4 and 5, the rear wall 7, the top, bottom and side walls 8, 9 and 10, respectively. The outer side walls 8, 9, 10 inner chamber freezers, converted to a layer 6 of insulating material, covered with a film of graphite or plastic with graphite filler, which is not visible in figure 1 because of its small thickness. Possible sticking of the film respectively separately on each wall 8, 9, 10, or wrap it around all four walls 8, 9, 10. Aluminum is the tube 11 to spiral refrigerant passes through the walls 8, 9, 10 inner chamber in close contact with the film.
Figure 2 shows an alternative implementation of the refrigerating apparatus according to the invention. In this embodiment, the inner chamber 6, is wrapped by a layer of insulating material, bordered internal volume 12, which is mounted through in her box 13 is divided into the freezer (in the cavity of the box 13) and conventional refrigerating chamber 2 (outside of the box 13). Wall of the box 13, made of plastic or metal, the outside covered with a film of graphite or plastic with graphite filler, and around the film spirally coiled pipe with refrigerant 11.
Figure 3 schematically and not to scale shows a partial section of the inner container freezer refrigeration apparatus 1 or the box 13 with figure 2. Shows the top wall 8 and the adjacent portion of the side wall 10. Shown here in 14 film of graphite or plastic with graphite filler, forming a unit, passes through the walls 8, 10. Thanks to the efforts resulting from the winding tube 11 around the camera, the pipe 11, especially near the rounded edges 15, embedded in an elastic film 14. The initial thickness of the film 14 in these places is shown by the dashed line. This elasticity of the film leads to more extensive contact between the film 14 and the pipe 11 near ribs 15, which, is turn, provides a highly efficient heat transfer between the pipe 11 and the film 14.
Figure 4 shows a section of the upper wall 8, which clearly shows how the pipe 11 is pressed to the film 14.
In addition, as shown in figure 3, the portion of the pipe 11 passing between the two angles can be slightly arched and yet throughout its length to touch the film 14. Thus, the efficiency of the heat exchanger formed by the pipe 11, the film 14 and the walls 8, 9, 10 inner chamber, equal to the efficiency of conventional evaporator, using as a heat-distributing layer between the refrigerant pipe and the wall of the internal chamber aluminum film, even if the coefficient of heat transfer film 14 is higher than that of conventional aluminum film.
In practice, however, it is easy to provide film 14 at least equivalent heat transfer coefficient. If the film 14 is made of pure graphite, it is sufficient thickness of 100 to 200 micrometers to provide a heat transfer coefficient of about 0.5 W·m-2K-1that corresponds to the characteristic of ordinary aluminum film thickness of 30 micrometers. This thickness corresponds to the number of graphite from 100 to 200 mg/cm2and it should be assumed that the proper amount of graphite to be enough in the film with graphite fill elem, in order to achieve the same heat transfer coefficient.
Instead of the flexible film 14 can also be used as a heat distribution layer between the pipe 11 and the walls 7, 8, 9 and/or 10 plastic plate 16, the conductivity is increased by the addition of graphite. However, the number of graphite, which can be added to most synthetic materials, not denying them the strength is limited, so thermal conductivity of the plastic plate 16 as a whole is significantly lower than that of the plate of pure graphite. However, this disadvantage is not of great importance, as appropriate kinds of cheap plastic, so that sufficient for practical purposes, the heat transfer coefficient is 0.4 W/m2·K, can be achieved by choosing the adequate thickness of the plastic plate 16. In practice, the thickness of the plate 16 from 1 to 2 mm is sufficient to accommodate the desired number of graphite from 100 to 200 mg/cm2.
A significant advantage of a plastic plate 16 is, however, that it is possible to form it as shown in figure 5, the tabs 17 which clamp the pipe, and thus to provide efficient heat transfer between the pipe 11 and the plate 16. You can perform similar protrusions, for example, in the form of hooks that secure the pipe to the plate; preferred is shown in Phi is .5. a variant in which the protrusions 17 are made in the form of elongated in the longitudinal direction of the ribs, in pairs bounding the groove, in which is enclosed pipe 11. To further improve the heat transfer, the projections 17 in the form of ribs on figure 5 are facing each other, the concave side surface 18, the radius of curvature of which respectively coincide with the outer radius of the corresponding pipe 11, so that the side surface 18 and the pipe 11 in contact for more than half of the circumference of the pipe.
Figure 6 shows the axonometric image of the internal chamber of the freezer in accordance with a variant of the improvements of the present invention in a direction at an angle from below. The top, bottom and side walls 8, 9, 10 of the inner chamber, as described in connection with figures 1-3, covered with graphite-bearing film 14, as denoted by the dashed figure 6 section 19 of the tube 11 of the refrigerant'd proceed around spiral around the walls 8, 9, 10 in contact with the film 14. As on the rear wall 7 of the inner camera tube 11 cannot be fixed by wrapping, as in the case of section 19, here glued to the plate 16 of the type described in connection with figure 5, and section 20 of the pipe 11 passing in the form of a meander on the plate 16, is clamped between the respective protrusions emanating from the plate 16. Thus, the freezer is cooled at the same time, what about with five sides; heat can penetrate only through the open front side.
To compensate for the flow of heat from the open front side and to retain the maximum possible uniformity of the temperature distribution in the freezer, it is desirable to increase the density with which laid the pipe 11 in the front, at least in the front part of the bottom wall 9. This increased density on a single wall, however, is unattainable in section 19 with the pipe, spirally twisted around the walls 8, 9, 10. In order to provide the opportunity to increase the density in the anterior region of the lower wall 9, there is placed a second plate 21 of graphitemoderated plastic: it can be glued to the film 14 or the film 14 on the area occupied by the plate 21, is cut. Part 22 section 19 of the pipe around the walls 8, 9, 10, passes through the plastic plate 21 in its longitudinal direction. On both sides of this part 22 of the tube is a pair of protrusions, between which are secured the fate of the pipes 23, 24 parallel to the pipe section 21. These sections of the pipes 23, 24 are connected between themselves and with the end 19 of the pipe with the help of lap 25, 26. Section 27 of the pipe, passing along the edges 15 between the bottom and side wall 9, 10, represents a connection to a tube passing through the rear wall 7.
1. The evaporator for the refrigeration devices is and with a pipe (11), which refrigerant passes, with at least one support plate(7, 8, 9, 10), fixed on the pipe (11)and located between the pipe (11) and bearing plate (7, 8, 9, 10) heat-distributing layer (14, 16, 21), differentthe fact that a heat-distributing layer (14, 16, 21) is graphitemoderated.
2. The evaporator according to claim 1, characterized in that the proportion of graphite in the heat distribution layer (14, 16, 21) is at least 100 mg/cm2preferably at least 200 mg/cm2.
3. The evaporator according to claim 1, characterized in that the heat-distributing layer (14, 16, 21) has a heat transfer coefficient of at least 0.4 W/m2·K.
4. The evaporator according to claim 1, characterized in that the tube (11) is held in the recess in the heat distribution layer (14).
5. The evaporator according to one of claims 1 to 4, characterized in that the heat-distributing layer comprises a film (14) of essentially pure graphite.
6. The evaporator according to one of claims 1 to 4, characterized in that the heat-distributing layer includes a plastic film (14) with graphite filler.
7. The evaporator according to one of claims 1 to 4, characterized in that the heat-distributing layer comprises a plastic plate (16, 21).
8. The evaporator according to claim 7, characterized in that the plastic plate (16, 21) has projections (17)securing the pipe (11).
9. The evaporator p is item 8, characterized in that the projections (17) are concave side surfaces (18), arranged in pairs opposite each other.
10. The evaporator of claim 8 or 9, characterized in that the projections (17) made in the form of ribs along the pipe (11).
11. Refrigerating apparatus, in particular a domestic refrigeration device, evaporator, as claimed in any of the preceding paragraphs, characterized in that the carrier plate (7, 8, 9, 10) forms a wall of the refrigerating or freezing chamber of the refrigerating apparatus.
12. The refrigeration apparatus according to claim 11, characterized in that at least two walls (7, 8, 9, 10) freezers are bearing plates of the heat exchanger and that the heat distribution layer (14, 16, 21) includes a plastic plate (16, 21)filled with graphite, on the first of the walls (7, 9) and the film (14) on the second wall (9).
13. The refrigeration apparatus according to item 12, characterized in that the tube (11) on the first wall (9) arranged more densely than the second wall (10).
14. The refrigeration apparatus according to item 12 or 13, characterized in that the first wall is a rear wall (7) or the bottom wall (9) of the freezing chamber.
15. The refrigeration unit evaporator claimed in any one of claims 1 to 10, characterized in that the carrier plate is freely located in the inner space of the refrigerating apparatus.
SUBSTANCE: in the heat exchanging device the finned heat exchanging tube with the diameter d is made serpentine-shaped with an outer finning diameter D and the thickness of the fins L1, located at a distance L2 from each other. The amplitude of the serpentine A on the outer finning diameter is not less than
EFFECT: intensification of heat exchanging due to turbulence in the flow passing inside the finned serpentine-shaped tubes, and increase in the area of heat exchanging of the device.
23 cl, 8 dwg, 2 tbl
SUBSTANCE: wire-and-tube heat exchanger, in particular, for a domestic refrigerator, comprises two layers of wire and a refrigerant tube passing through the intermediate space between the layers. The intermediate space is filled at least partially with bitumen. The bitumen film is heated and pressed into inside the intermediate space through the gaps between the wires.
EFFECT: improved efficiency of heat exchange between the heat carrying medium and the energy accumulating medium regardless of the mounting position of a heat exchanger, simplified manufacturing.
14 cl, 6 dwg
FIELD: power engineering.
SUBSTANCE: heat exchanger comprising a twisted pipeline, supplying a fluid working medium to the heat exchanger, a helical axis of horizontal direction and parts of the twisted pipeline arranged on the top and bottom from the helical axis. In accordance with this invention the helical pipeline provides for a double-section passage circuit, besides, the first passage circuit having large dimensions is designed for the working medium of the heat exchanger, and the second smaller circuit of passage is designed as a ventilation circuit. At the same time for each spiral passage in the upper part of the helical axis on a part of the twisted pipeline there is at least one hole for air exhaust, which connect to each other the first and second passage circuits.
EFFECT: provision of maximum possible ventilation for a heat exchanger with a pipeline of twisted type and a horizontal helical axis.
9 cl, 4 dwg
FIELD: power engineering.
SUBSTANCE: heat exchanger comprises the first pipe section, helically twisted into the first spiral to let through the first working coolant medium. The first spiral and the second spiral produced from the helically twisted second pipe section are inserted one into the other and connected to each other. Besides, the pipe sections are connected by means of a pipe section stretching between opposite ends of both spirals.
EFFECT: higher efficiency of device application.
9 cl, 12 dwg
SUBSTANCE: thermal compression device includes high pressure gas source connected to cylinders-compressors, device for thermal cycling of cylinders-compressors, of the set of capacities with various temperatures and cold source. Cold source in the form of Dewar vessel, which is filled with cooling agent, is located together with capacities with various temperatures on the installation device. Installation device is fixed with possibility of rotation. Low-temperature capacity is heat insulated, filled with liquid heat carrier and equipped with heat exchanger arranged in heat carrier. Heat exchanger is made in the form of a coil with bifilar winding of the tube and with diametre of the forming winding, which is more than the diametre of the circle enveloping cylinders-compressors. One end of the tube is connected through the side output by means of flexible connection and an adapter to Dewar vessel equipped with pressurisation system. The other tube end is led out to atmosphere. Cylinders-compressors and the source of forming the liquid heat carrier flow to capacities are suspended on the cover of the capacity, which is attached to the bracket in upper part of the support of the lifting mechanism. Lifting mechanism is located together with installation mechanism on the platform equipped with devices for its movement and fixture.
EFFECT: simplifying the design, improving the operation and increasing the efficiency of thermal compression device.
3 cl, 6 dwg
SUBSTANCE: invention relates to the sphere of heating engineering immediately dealing with design of heat exchange elements; proposed is a heat exchanger to be utilised as the evaporator of a refrigerant apparatus such as a household refrigerator or freezer as well as a method for its fabrication. The heat exchanger is fabricated of a support plate, a profiled component manufactured of a thermal insulant and having a groove arranged on its surface and a tube for heat medium circulation that is specially shaped to match the groove path. The heat exchanger fabrication technique envisages the tube being fitted in the profiled component groove and the support plate attached to the profiled component surface the tube is positioned on.
EFFECT: fabrication of high quality heat exchangers even under relatively non-strict requirements to manufacture tolerances.
2 cl, 2 dwg
FIELD: the invention refers to heating engineering and may be used in cooling technique.
SUBSTANCE: the heat exchanger for a refrigerator has a board, a pipeline for cooling medium being in heat conducting contact with the board and a layer of a holding material bounded with the board and the pipeline. The layer of the holding material is of bituminous composition with a stuff, at that the heat capacity of the stuff is larger then the heat capacity of the bitumen. The heat exchanger is manufactured by way of forming a foot consisting of a board, a pipeline and a plate out of bituminous composition, at that out of the plate by heating and pressing the packet they form a layer of holding material. At such execution the heat exchanger may be easily utilized.
EFFECT: provides firm joining of the layers of holding material with the board.
12 cl, 5 dwg
FIELD: heavy industry, applicable for cooling of circulating water of industrial enterprises.
SUBSTANCE: the heat-exchange apparatus has several cooling stages, each of them being made in the form of sections having a zigzag radiator, blow fan supplying the air flow directly to the zigzag supplying pipeline, and offtakes, and the rate of flow of cooling air produced by the blow fan is controlled with the aid of an induction motor fed and controlled by a frequency converter depending on the signal running from the temperature-sensitive element installed past the heater; the cooling stages are changed over with the aid of an automatic cooling water temperature control system.
EFFECT: reduced labor content of production, provided maintenance of the temperature of the heat-transfer agent within a preset range with the aid of a monitoring system.
FIELD: heat engineering devices.
SUBSTANCE: the recuperative heat exchanger has rigidly fastened tube plates with tubes installed in them in concentric circles, the tube cavities communicate with one another for supply of the heat-transfer agent, connections for supply and discharge of the heat-transfer agent by means of which the tube cavities are connected, the heat exchanger has intermediate tubes, the cavity of each tube communicates with the cavities of the two adjacent tubes by means of two branches, and the cavities of the delivery and discharge branches communicate with the cavities of the first and last tube of the formed tube coil, the interaxial distance between the last and first tubes in the adjacent concentric circles equals the interaxial distance of the branches, the length of the tubes installed in the adjacent concentric circles differs by the value equal or exceeding the size of the branches fastened on the tubes. Besides, pouring holes are made in the tube plates for communication of the cavities between the plates, the heat exchanger is provided with a perforated or cellular casing and lugs fastened on the plates, it is also provided with a perforated tube with a connection for discharge of the heated heat-transfer agent, it is installed in the holes heat-transfer agent, it is installed in the holes made in the center of the tube plates.
EFFECT: produced recuperative heat exchanger for heat-up of the liquid discharge zone in tanks with petroleum products.
4 cl, 4 dwg
SUBSTANCE: invention relates to a refrigeration circuit. The essence of the invention is the refrigeration circuit (3) for household appliances, in particular household appliances for cooling, such as refrigerators and freezers, comprises a first heat exchanger (5) made with the ability of fluid communication with the compressor (4), which provides cooling of cooling fluid medium which flows through it, and its transition to substantially liquid phase. It also comprises a second heat exchanger (7) fluidly communicating with the said first heat exchanger (5) and acting in the space (2) to be cooled. The second heat exchanger (7) provides a partial transition of the cooling fluid medium in gaseous phase with heat absorption thereby the said space (2) is cooled. The cooling fluid medium is circulated from the first heat exchanger (5) to the second heat exchanger (7) and, thus, enters into the compressor (4) for the next cycle. The capillary device (6) is located between the first heat exchanger (5) and the second (7) heat exchanger for expanding the said cooling fluid medium. One of the said first heat exchanger (5) and the second heat exchanger (7) comprises a flexible tube (9), and the part of the said tube (9) has such a corrugated profile, which gives it flexibility, and the said tube (9) in section comprises a layer (100) of plastic and a layer (101) comprising the metallic material. The metal layer (101) is connected to the plastic layer, and the said metallic material is configured with the ability to form a barrier against moisture. The said layer (100) of plastic is a layer the structural purpose of which is maintaining the shape of the tube (9), and is preferably made of a thermoplastic material. The metal layer (101) is flexible, it does not have a function of a supporting structure and comprises a single-layered metal film or a multilayer film comprising one or more metal films connected or not connected to the layer of material made with the ability to maintaining the shape.
EFFECT: improving the efficiency of heat exchanging and providing waterproofing.
16 cl, 27 dwg, 1 tbl
SUBSTANCE: invention refers to refrigerating unit (1) that includes external housing (2), at least one refrigerating compartment (3) for storage of cooled products (5) and refrigerating circuit (6) with evaporator (4) for cooling of refrigerating compartment (3). Evaporator (4) includes the first element (7) of evaporator and the second element (8) of evaporator; besides, the first element (7) of evaporator is located outside refrigerating compartment (3), and the second element (8) of evaporator is located inside refrigerating compartment (3). The first element (7) of evaporator is made in the form of a helix evaporator, envelops refrigerating compartment (3) and includes the pipelines carrying cooling agent, which are wound around the refrigerating compartment and are in heat-carrying contact with it. The first element (7) of evaporator and the second element (8) of evaporator are connected in series; besides, the cooling agent circulating in refrigerating circuit (6) of the refrigerating unit first flows through one evaporator element, and then through the other evaporator element, or they are parallel connected.
EFFECT: increasing efficiency, and cooling or freezing capacity.
6 cl, 1 dwg
SUBSTANCE: invention refers to refrigerating device, in which there installed is evaporator with anti-icing device (4) intended for elimination of ice accretion on tube (3) for cooling agent and/or heat exchanger (2); with that, the above heat exchanger (2) includes tube (3) for cooling agent with expansion point (3.3) having an increasing diameter; at least one branch pipe (3.1) of small diameter and one branch pipe (3.2) of large diameter is connected to heat exchanger (2). Property of invention is that in comparison to front section of tube (3), the above anti-icing device (4) in section to inlet element (3.2.1) of heat exchanger is approximated to branch pipe (3.2) of large diameter and preferably to expansion point (3.3).
EFFECT: effective elimination of evaporator icing.
8 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: cryogenic liquid evaporator includes a housing with cooling agent inlet and outlet chambers, heat exchange elements containing a liquid cooling agent chamber and a central tube equipped with an ejector. Cooling agent inlet and outlet chambers are divided with a partition wall with a hole, heat exchange elements are installed in the partition wall and interconnected with the central tube; the central tube is installed into the hole made in the partition wall with a gap, and the ejector has an insert that controls gaseous cooling agent from liquid cooling agent chambers. Cryogenic liquid evaporator is equipped with a recuperator. Evaporator allows increasing cooling agent use efficiency due to repeated use of cooling agent and arrangement of two-stepped cooling of working substance.
EFFECT: absence of any additional heat source for evaporation of liquid cooling agent and absence in the design of massive heat exchange head pieces additionally increases evaporator operating efficiency and reduces hydraulic resistance of an evaporator.
1 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: invention describes evaporative device (1) designed for obtaining ammonia and use of device (1) in mobile exhaust gas outlet systems; device (1) includes housing (2) with at least one supply pipeline (3) and at least one discharge pipeline (4), in which there provided is at least one heating element (5) and at least one channel (6) for connection of supply pipeline (3) to discharge pipeline (4), and in which at least one heating element (5) is in heat-conducting contact with evaporative section (7) of at least one channel (6), and at least one channel (6) is made on that evaporative section (7) in the form of meander (8). Besides, evaporative section includes at least one tube that is rigidly attached to the housing.
EFFECT: invention differs by compactness and allows obtaining gaseous ammonia with the specified accuracy and completeness.
16 cl, 11 dwg
SUBSTANCE: invention refers to a refrigerating device with a cooling agent circulation system that includes a cooling agent compressor, a condenser, an evaporator with an evaporation plate for heat energy transfer from a refrigerating compartment of the refrigerating device to the cooling agent circulation system, and a temperature sensor for determination of evaporation plate temperature through sensitive surface of temperature sensor, which is connected to the evaporation plate by means of a holder. Holder is made so that immediate contact of sensitive surface of temperature sensor to evaporation plate of the evaporator that is located inside the refrigerating compartment is provided.
EFFECT: use of the present invention allows improved determination of evaporation plate temperature.
10 cl, 5 dwg
FIELD: electrical engineering.
SUBSTANCE: refrigerating apparatus is designed with at least one storage box cooled by an evaporator in the form of a plate and one refrigeration circuit containing such evaporator in the form of a plate. The channel (1) for the evaporator cooling medium is divided into at least two pipeline branches (4, 5) that cool the storage box, are included into the refrigeration circuit in parallel and have gravity centres (9, 10) distanced from each other.
EFFECT: distance between the gravity centres exceeds the ratio of the evaporator surface area to the length of the channel laid along the said evaporator; the invention usage will allow to reduce the refrigerator energy consumption.
9 cl, 2 dwg
FIELD: power engineering.
SUBSTANCE: invention relates to a valve unit (1), comprising an inlet hole, a distributor and an outlet part having at least two outlet holes. The distributor comprises an inlet part (5), communicating with the specified inlet hole, and is made as capable of distributing fluid medium received from this inle thole, between at least two parallel flows of a heat exchanger (3). The valve unit (1) also comprises the first valve unit and the second valve unit installed as capable of displacement relative to each other so that mutual position of these valve elements determines the fluid medium flow passing from the inlet hole to each outlet hole of the outlet part. Besides, the valve unit (1) comprises a collector (2) forming an integral part of the valve unit (1). This collector (2) is made as capable of forming a zone of coupling with a heat exchanger (3), having at least two channels, at the same time this collector provides for such liquid communication, at which every outlet hole (7, 9) communicates with the channel of the heat exchanger (3), connected to the collector (2). The collector comprises at least one separating element that separates at least two sections of the collector, besides, each of these sections communicates with the distributor and the specified zone of coupling with the heat exchanger.
EFFECT: using the invention will make it possible to improve distribution of a coolant between heat exchanger channels.
13 cl, 11 dwg
FIELD: instrument making.
SUBSTANCE: refrigerating unit is proposed with an insulated inner space, where at least one cooled part installed, the surface of which is prone to icing. According to the invention, onto surfaces prone to icing a coating is applied, which contains organic substances preventing growth of ice crystals or limiting it.
EFFECT: using this invention makes it possible to reduce power consumption.
6 cl, 2 dwg
FIELD: power engineering.
SUBSTANCE: cooling element for cooling of air passing through it under gravity, comprising multiple cooling discs installed in the form of an array to form gaps between them, stretching vertically and designed for flow of cooled air, besides, cooling discs reaching to the side, which is an inlet side for cooled air, alternate with shorter cooling discs, which do not reach the specified input side, so that air flows from wider gaps into narrower ones.
EFFECT: expanded arsenal of facilities for cooling of various objects.
4 cl, 2 dwg
FIELD: mechanical engineering.
SUBSTANCE: wire-tubular evaporator is provided with guide plate whose body is extended lengthwise and at least one tubular clip for securing the plate to evaporator tube. Tubular clip is mounted on bracket extending aside from plate body.
EFFECT: enhanced accuracy of fitting the guide plate along center line of evaporator.
8 cl, 3 dwg