Heating device of electric appliance with water conduit for operation on running and/or contaminated water

FIELD: heating.

SUBSTANCE: invention refers to heating device of appliance with water conduit for operation on running and/or contaminated water, namely for electric household appliances, such as washing or dishwashing machine; at that, heating device has at least one heating element, and this heating element is located on or in water conduit; at that, water conduit wall has the hole in the heater zone and conductivity metre is also provided, which is installed so that it is in the zone of that hole or protrudes through the hole inside water conduit.

EFFECT: invention allows optimising the need for washing liquids owing to improved measuring devices of water and time saving.

18 cl, 3 dwg

 

The area of application and the level of technology

The invention relates to a heating device of the appliance with the conclusion to work on water and/or contaminated water, in particular for household appliances, such as washing machine or dishwasher. The heating device has at least one heating element located on or in the pipeline.

This type of device is known, for example, from European patent EP 0421442 B1. It describes a washing machine a drum type having a heater led out through the wall in the lower section of the outer tub. Bore the hole for the heater in the wall of the sealed holder of the heating device.

Further, for example, from a European patent application EP 0633342 A1 a method and device for optimization of the used detergents. Device for determination of conductivity posted this in vodopadnoe washing machines or dishwashers and determines the conductivity of the water. The conductivity of the water varies with dissolved ions, i.e. from the level of calcification. However, the conductivity of the wash liquor may not be defined in such a way and therefore this kind of device.

Problem and solution

Therefore, the basis of the invention is to create such heat is telego device, which further can be optimized the need for detergents (detergents) for automated purification process by improved measurement of saving water and time, as well as washing, for example, linen gentle way. At the same time the invention is achieved by a reduction of working stages during installation of metering systems.

This problem is solved by means of a heating device with the features according to paragraph 1 of the claims. The predominant and preferred form of execution of the invention are the subject of the following (dependent) claims and are explained in the following in more detail. The content of these claims made with clear reference to the text description.

According to the invention the wall of the conduit has an opening in which the conductivity meter is placed in the zone of the heating device so that it is inside the conduit. Moreover, according to the exemplary embodiment of the invention the conductivity meter is the holder of a heating device in such a way that it acts inside of a conduit. Combination heater with the measuring device has many advantages. One of them is the fact that several functionally important parts of the appliance combined in one unit, is in the process of installation of the appliance, for example, the conveyor may be provided by fewer working steps and working positions. In another case, the device according to the invention can, for example, an existing appliance retrofit meter conductivity without incision into the wall of the conduit.

In the exemplary embodiment of the invention in the holder provided by the excavation for installation of conductivity meter. The meter can be plugged into it, which makes it pass into the hole, and the fastening.

In another form of the heating element is planar to the outer side wall, and a substantial part of the outer surface can be closed. For example, the conduit may be made tubular, in particular in the form of a so-called heating tube. Then the heating element is a wound on the conduit of the heating wire, for example, a spiral, in particular flat heating wire. But the heating element may be manufactured and respectively applied by way of thick-film technology in the form of a heating loop, for example, a method of manufacturing printed circuits, etc.

The conductivity meter can be inside of the conduit as a single item. It may be only one or may be more. When this meter fills a hole in the system is IU conduit preferably completely and closes it, in particular rod or socket.

In another form of execution of the invention the conductivity meter has at least one electrical contact pin, one pin and one touch area. Preferably in the touch area includes at least two sensors for conductivity measurement. In this case the rod is made oblong or cylindrical shape and at one end has a touch sensitive area. At the opposite end of the rod is provided with a contact output that can be done with different forms of connection, such as plug-in connection, screw terminal connection, or any other appropriate opportunity electrical contact.

The conductivity meter coming from located on the outside wall section of the holder entered in the slot of the holder so that the contact area is at a distance and out of water conducting parts. Touch the area on the opposite side of the holder is of him in such a way that the sensors are completely free.

In the exemplary embodiment of the invention the sensors are designed as electrodes through which can be determined resistance or the electrical conductivity of water. Determination of the electrical resistance of any object provides preferential ability to define it in the conductivity. Conductivity can be measured directly or indirectly, with direct measurement is the preferred method. This can be directly applied to the measured values.

In the exemplary embodiment of the invention the electrodes are designed as plates of a capacitor for determining the dielectric constant or the dielectric conductivity of the water. On the dielectric permittivity of a simple computing operation is ensured by the definition of the conductivity of the water. Thus preferably the water to enter only one electric field, so that no leakage currents, for example, through the body.

In the exemplary embodiment of the invention the sensors are made in the form of coils, through which can be determined dielectric constant of water. From these data, the dielectric constant by a simple computation gives the definition of the conductivity of the water. In this form of execution is also the advantage that the water is not receiving any current.

The following form of the invention the sensors are made of corrosion-resistant material, at least preferably covered with a corrosion-resistant material. This embodiment sensors are particularly preferable, because the water can be added to detergents, which came who try to react with many materials and convert them, and thus change their properties in an unpredictable way. The electrodes can be manufactured, for example, stainless and chemically resistant steel or stainless steel. If there are corrosion-resistant coating, it can be done, for example, from a polymeric material.

The electrodes can be made from a semiconductor material having an oxide isolation. Due to this can be achieved with a small surface roughness, making complicated by the deposition of contaminants and impurities. Namely, these deposits could distort the measurement data. As electrode material, it is assumed, for example, silicon. Insulation can be made of a layer of tantalum pentoxide, and this layer may have a thickness innmrange.

The touch area is preferably elongated and separated from the holder essentially vertically. Thus, it can be achieved particularly narrow from the point of view of the space saving design of the device. In this case the heating device or heating element may be made oblong, and it mainly has an intermediate space or free volume, which is the touch area. When this sensor can be carried out inside the heater and therefore they should be covered. So the sensor is subzone can be fully integrated into the design of the heating device or heating element. Therefore, this device can also be provided in the appliance, which provides a heating element without providing them with another place. Electrical supply wires are already here in the form of a bundle of cables or the like

In one form of execution of the invention the conductivity meter disconnected at some distance from the heating element. Because of this meter is fully washed with water than is provided mainly the avoidance of measurement errors. As well as thermal energy of the heating element is not transferred directly to the conductivity meter, but only the first on the water, because it also needs to be heated. Thus, it is possible to avoid damage of the meter conductivity, which, for example, can be caused by high temperature, krupenie material of the gauge.

In the form of execution according to the invention the contact output terminal and the touch area is made of corrosion-resistant material. This material may be plastic, which in the extrusion process nespracovavali around the touch area and its contact-pin devices. Mainly by way of extrusion is obtained quickly and conveniently large number of products.

In one example, solenoidality the conductivity meter are made as one whole piece. Thus, there is a module or a unified site that may be simple and one working the reception is installed in the holder of the heating device.

In the exemplary embodiment of the invention the sensors by means of electrically conductive connections are made through terminal connected plug connector device to the terminal. Thus, there is no need to perform additional grooves in the holder, through which can be carried out contact-pin devices. Providing a contact-pin devices in the rod allows you to perform the conductivity meter is fully closed in the area, which is lowered into the water. In the following example, run the recess in the holder is made in accordance with the conductivity meter, mainly in accordance with the rod, thus achieving a sealing effect. In another example, execution of the conductivity meter is installed with the seal in the holder. Due to this both the above forms of execution do not need to provide any other sealing device, which accounts for the subsequent installation of the decline occurring incidental expenses.

In the exemplary embodiment according to the invention the connection between the conductivity meter and the holder has fix the Oia from turning, this retainer is made mainly so that the sensors measuring the conductivity in the assembled condition of the device is oriented vertically. Mainly on the sensors is not going any sediment that long-term and unintended way distort the measurement results.

In the exemplary embodiment according to the invention the holder is placed with the seal in the recess of the wall of the conduit. Thus, the water in the area covered by the walls, unable to flow out of the conduit.

In the exemplary embodiment of the invention provides an analyzing device for processing a touch signal of the conductivity meter. Preferably, the analyzing device is intended to correct a specific measured values of the conductivity on the basis of the correction values, which may be distorted due to the close proximity to the heating element due to the locally increased water temperature. Correction of the measured values is necessary, as water with a high temperature has a higher conductivity compared with the same water at low temperature. The correction factor can be determined, for example, through a series of tests.

These and other signs, except signs of the claims that follow also from the description and drawings and the individual who signs feasible, respectively, singly or in the aggregate, in the form of subcombination to one exemplary embodiment of the invention and in other fields and can represent a preferred, as well as in themselves copyrightable forms of execution, for which it is sought to protect. The division of the application into individual sections does not mean that the content of each section cannot be extended to the entire proposal as a whole.

Brief description of drawings

Examples of carrying out the invention is represented schematically in the drawings, a more detailed description of which is given below, and are shown:

figure 1 - image of the device according to the invention with a heating device and a conductivity meter,

figure 2 is an enlarged partial image sections of a conductivity meter,

figure 3 is an alternative embodiment of the heating tube is hosted outside heater and inserted inside her / conductivity meter.

Detailed description of drawings

Figure 1 shows a device 10 according to the invention with a heating element 12 and a conductivity meter 14. The heating element 12 has a heating coil 16, which is completely immersed in the heated water, and the holder 18, which about half is in the water. Elongated heating coil 16 has the form of a meander and forms an intermediate space 20.

The holder 18 is made of an elastic section 22, which in the fully assembled device is shown in C is the return conduit in the recess of the wall of the conduit and sealed. Next on the holder 18 is made of the flange 24, which in the installed position adjacent to the outer surface of the water-piping wall and fixed thereto. The holder 18 is shown provided with a dashed line the slots 26, 28 for proper installation and sealing of the conductivity meter 14 and, for example, bimetallic fuse 30 or so on Both these device are inside the intermediate space 20. Any other devices or elements can be placed in the same or other fill.

Made monolithic conductivity meter 14 has, as it follows from figure 2, the touch area 32, an elongated and substantially cylindrical rod 34 and the electrical contact pin 36. Touch area 32 represents the elongation of the rod 34, however, on its upper side has a flattened section 38, on which the sensors are located two is planar electrode 40 and laid in it. These electrodes 40 are located approximately parallel to and approximately in the same plane, namely on the flattened surface 38. However, the shape of these electrodes 40, as well as their layout can be done in every other case variable and suitable for this form.

At the opposite end of the rod 34 in its sequel is contact pin 36, preferably made rectangular, and Audi stenobrachius form. The cross-sectional area of the electrical connection 36 is selected greater cross-sectional area of the rod 34, making contact pin 36 has a mounting flange 42.

From the electrodes 40 are drawn, respectively, from each along the rod 34 connecting wires 44 to the terminal 36. These connecting wires 44 can be made in the form of wire or stranded wire and at its opposite electrodes 40 ends have connectors 46 that protrude inward in stenobrachius the notch 48 of the contact output 36. Takanohana the recess 48 and the plug 46 form a socket plug contact, which can engage with ensuring contact the appropriate plug.

As shown in figure 1, the rod 34 of the conductivity meter 14 is installed is shown in dashed line the notch 26 so that the touch area 32 is in the intermediate space 20 and the flange 42 adjacent to the outer side of the flange 24. When this measuring device 14 in the described exemplary embodiment are placed so that the touch area 32 is oriented vertically to the plane defined by the heating coil 16. This orientation of the measuring device 14 relative to the aforementioned plane depends, in General, from the arrangement of the heating elements is 12 in the appliance. It is selected preferably to always so that the touch area 32 is oriented vertically. To prevent unwanted turning of the measuring device 14 in the recess 26 may be provided with locking device (lock), for example in the form of a geometric circuit, for example, in the form of a core, scalawags with a groove in the rod 34.

Figure 3 shows in cross section of the heating tube 111. It consists of isolated outside of a metal tube 119 with reduced section 121. External insulation as a heating device 112 is wound in a spiral flat heating wire 116 and is fixed, for example glued. Here may be placed thick-film resistor, in particular, directly by printed wiring.

In a metallic tube 119 is made the hole 135. This hole in the wide gap between the turns of the heating wire 116 has a conductivity meter 114 and sealing. Effective sealing is achieved by a cap 137, which goes outside in the flange 142. This cap sits with precise fitting and, if necessary, seal this hole 135. From cap 137 departs contact pin 136. In this case the rod 134 with electrodes 140 is inside the tube 119 so that the electrodes are virtually the ski in the middle of this tube. Thus, they are particularly good are streamed with water in the tube current, for example, from right to left.

Alternatively, the electrodes can be placed on different terminal so that they are relatively close to the inner wall of the metal tube 119. Then the terminal does not act or is issued only minimally on the inside of the cross section of the tube 119 and runs almost parallel to it. Then the flow is virtually unimpeded without slowing down the passage and with little turbulence. Thus the electrodes can be arranged in the flow direction sequentially or next to each other.

1. The heating device of the appliance pipeline to work on water and/or contaminated water, and the heating device has at least one heating element located on or in the conduit, characterized in that the wall of the conduit in the area of the heater has a hole and a conductivity meter installed so that it is in the area of the hole or through this hole is inside the conduit.

2. The heating device according to claim 1, characterized in that the heating element is installed through the bracket into the hole of the wall of the conduit, and the conductivity meter installed by Naeem holder and is inside the conduit.

3. The heating device according to claim 2, characterized in that the holder is made excavation for installation of conductivity meter.

4. The heating device according to claim 1, characterized in that the heating element is placed on planar outer side wall of the conduit and closes a large part of the outer surface.

5. The heating device according to claim 1, characterized in that the conduit is made tubular, and the heating element is placed on a conduit of the heating wire.

6. The heating device according to claim 4, characterized in that the conductivity meter in the form of a monolithic block is inside the conduit.

7. The heating device according to claim 4, characterized in that the conductivity meter has at least one contact pin, one pin and one touch sensitive area.

8. The heating device according to claim 7, characterized in that the conductivity meter in touch zone has at least two sensors for conductivity measurement.

9. The heating device according to claim 8, characterized in that the sensors for determining the electrical resistance or conductivity of the water in the form of electrodes.

10. The heating device according to claim 8, characterized in that the sensors for determining the dielectric constant is made in the form of capacitor plates.

11. On revalee the device of claim 8, characterized in that the sensors for the determination of dielectric constant in the form of coils.

12. The heating device according to claim 8, characterized in that the sensors are covered, at least one corrosion-resistant material.

13. The heating device according to claim 7, characterized in that the touch area of the conductivity meter is made elongated.

14. The heating device according to claim 7, characterized in that it is, accordingly, the heating element has an elongated shape, and it has an intermediate space or free volume, which is the touch area.

15. The heating device according to claim 1, characterized in that it, together with the conductivity meter forms previously collected and dismantled the unit.

16. The heating device according to item 15, characterized in that it has a notch in the holder made on the basis of compliance with conductivity meter and conductivity meter installed in waterproof holder.

17. The heating device according to item 16, characterized in that it has a connection with geometric closure and fixation from turning between the conductivity meter and the holder, the clamp lock is designed so that the sensors measuring the conductivity in the assembled state of the device orie is oriented vertically.

18. The heating device according to claim 1, characterized in that it provided an analyzing device for processing a touch signal of the conductivity meter, and this device is intended to correct a specific measured values, which may be distorted due to the close proximity to the heating element due to the locally increased temperature, on the basis of the correction values.



 

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