RU175596U1 - HEAT EXCHANGE BLOCK - Google Patents

Abstract

The utility model relates to thermal stabilization systems and can be used to provide the required thermal regimes of elements of electronic equipment, in particular electronic circuit boards. According to the claimed solution, in a heat exchange unit based on thermoelectric modules containing at least one thermoelectric module, heat exchange channels for hot and cold heat carrier, arranged in such a way that the heat exchange channels of one type are located on the hot side of the thermoelectric module, and the heat exchange channels of another type with the cold side of the thermoelectric module, contain porous inserts forming a developed heat transfer surface. The porous inserts of the internal cavities of the heat exchange channels are made of the same material with the material of the walls of these channels, forming a single monolithic structure, also in such a way that the hot and cold coolant passes through the porous inserts only in the cross section of the inserts. The technical result is an increase in the efficiency of heat transfer by applying a developed heat transfer surface without significant deterioration of the hydrodynamic flow pattern. 2 C.p. f-ly, 1 ill.

Description

The utility model relates to thermal stabilization systems and can be used to provide the required thermal regimes of elements of electronic equipment, in particular electronic circuit boards.

A device is known for heat exchange between a wall and a medium flow (see patent No. 2367873, class F28F 1/00, publ. 09/20/2009), comprising a heat-exchange impermeable wall and connected to it made of a porous permeable material with a component oriented along the flow openings that are open on one side communicate with the element for supplying or discharging the medium and are closed from the opposite end. The part is made in the form of a folded or wavy spacer consisting of contact pads and heat exchange ribs, the holes are formed by the spacer ribs and the wall and have a curly cross-section, the contact pads are connected to the wall, and the spacer in the area of the contact pad has a pore diameter smaller than in the region of the rib .

The disadvantage of this device is the lack of cooling efficiency.

A device for heating and cooling a liquid is known (see patent No. 2154875, class H01L 35/28, publ. 08/20/2000), including at least one thermopile, heat exchangers for hot and cold fluid circuits, equipped with sealed gaskets, upper and lower covers, means for supplying and discharging liquid, a power supply unit with power elements, the input of which is intended to be connected to the network, and the output to the current terminals of the thermal battery. It also contains one panel for cooling the power elements of the power supply unit, made of heat-conducting material, which is connected to the power supply unit and the control unit, provided with an additional output for connecting external devices, and temperature sensors installed on heat exchangers and connected to the control unit. The heat exchangers are made in the form of alternating channels of hot and cold circuits of the fluid flow, the upper and lower walls of which are formed respectively by two hot or cold heat conduits installed in parallel with a gap in relation to each other thermal batteries, between which are sealed gaskets. The upper and lower covers are mounted on sealed gaskets to form the upper and lower channels of the heat exchangers. Moreover, the channels of each heat exchanger are connected in series using means for supplying and discharging liquid.

The disadvantage of this device is the lack of heat transfer efficiency due to the lack of a developed heat transfer surface in the channels.

The closest known technical solutions is a combined vortex thermoelectric device (see patent No. 2479073, class H01L 35/28, publ. November 20, 2012 - prototype). The device includes a housing made of non-metallic insulating material with low thermal conductivity, consisting of a hollow cylinder, three upper and four lower end bottoms. A vortex tube with a tangential inlet is installed inside the hollow cylinder between the end bottoms, which consists of six rectangular (slotted) holes made tangentially to the inner diameter of the vortex tube. To swirl the flow entering the vortex tube, six radial pipes of rectangular cross-section, curved towards the swirl, are welded to it, which, in turn, are rigidly connected to the input manifold located between the end bottoms and made in the form of a torus of rectangular cross-section. Outside, an inlet pipe with a flange is welded to the manifold. An accelerator sleeve is screwed in one of the bottoms, and a brake device made of a non-metallic material with low thermal conductivity is screwed in the other bottom. On the accelerator sleeve there is an axial hole expanding from one edge, two radial holes and a swirl made in the form of a screw, the swirl direction of which coincides with the direction of swirl of the flow. There are six radial ribs on the brake device.

On the outside, around the circumference along the vortex tube, six hot and six cold heat exchangers are arranged alternately with a gap relative to each other, made in the form of trapezoidal cross-section pipelines with circular end pipes. Thermoelectric modules are installed in the gaps between the hot and cold heat exchangers in such a way that with one flat heat-sensitive surface they fit snugly against the sides of the trapezoidal pipelines of the hot heat exchangers, and the other with their flat heat-sensitive surface - to the sides of the trapezoidal pipelines of the cold heat exchangers. Hot heat exchangers are fixed on the end bottoms with nuts, for which a thread is made on the end pipes, and they are passed through holes made in the end bottoms. At the same time, the vortex tube is pressed against the end bottom by the action of the end bottom on the thrust washer installed in the groove made in the vortex tube, and cold heat exchangers are fixed on the end bottoms with nuts, for which a thread is also made on the end pipes and they are passed through holes made in the end faces. The end bottom is fastened to the end bottom, and the end bottom to the end bottom with twelve bolts screwed into double arc-shaped nuts located inside the end bottoms. Outlets for securing hot and for exiting cold flows are fixed on the end bottoms using nuts. In the end bottom and hollow cylinder there are cutouts in which a sleeve is installed for the output of the electric cable. An electrothermal insulating sleeve is installed as an insulating strip between the inner end parts of the thermoelectric modules and the vortex tube. The inputs and outputs of the cold heat exchangers are connected to the vortex tube through the cold flow collectors in the form of annular cavities formed by the gaps between the end bottoms. The inputs and outputs of the hot heat exchangers are connected to the vortex tube through the hot flow collectors in the form of annular cavities formed by the gaps between the end faces. To ensure the tightness of the joints, sealing elements are used. For additional heating of the hot stream passing inside the trapezoidal pipelines of the hot heat exchangers, transverse partitions can be installed in them. When using a braking device with an axial hole to ensure the circulation of cold flow in a closed cycle (vortex tube - cold heat exchanger - vortex tube), a plug is installed on the outlet flange pipe of the cold flow and fastened with bolts.

The disadvantage of this device is the lack of heat transfer efficiency, also the disadvantage is the additional change in the hydrodynamic flow pattern through the use of a vortex tube.

The technical effect achieved by the proposed heat exchange unit is to increase the efficiency of heat transfer by applying the developed heat transfer surface without significantly degrading the hydrodynamic flow pattern.

This technical effect is achieved in a heat exchange unit based on thermoelectric modules, containing at least one thermoelectric module, heat exchange channels for hot and cold heat carrier, arranged in such a way that the heat exchange channels of one type are located on the hot side of the thermoelectric module, and the heat exchange channels of another type are on the cold side of the thermoelectric module, according to the utility model, the internal cavities of the heat exchange channels contain porous inserts that form thawed heat transfer surface. The porous inserts of the internal cavities of the heat exchange channels are made of the same material with the material of the walls of these channels, forming a single monolithic structure, and the hot and cold coolant passes through the porous inserts only in the cross section of the inserts.

The essence of the utility model is illustrated in FIG. 1, which shows a heat exchange unit based on thermoelectric modules, containing three thermoelectric modules, heat exchange channels for hot and cold heat carrier, arranged so that the heat exchange channels of one type are located on the hot side of the thermoelectric module, and the heat exchange channels of another type are on the cold side of the thermoelectric module . The internal cavity of the heat exchange channels contain porous inserts forming a developed heat transfer surface. The heat transfer unit includes:

1 - thermoelectric module;

2 - heat exchange channel from the cold side of the thermoelectric module;

3 - heat transfer channel from the hot side of the thermoelectric module;

4 - porous insert;

5 - a plug impenetrable for the coolant;

6 - input collector of heat exchange channels from the cold side of the thermoelectric module;

7 - input collector of heat exchange channels from the hot side of the thermoelectric module;

8 - output collector of heat exchange channels from the hot side of the thermoelectric module.

Structurally, a heat exchange unit based on thermoelectric modules contains three thermoelectric modules 1, three heat exchange channels 2 are located on the cold side of the thermoelectric module, three heat exchange channels 3 are located on the hot side of thermoelectric modules 3. Porous inserts 4 are located inside the heat exchange channels 2, 3. Porous inserts 4 internal cavities of heat exchange channels 2, 3 are made of the same material with the material of the walls of these channels, forming a single monolithic structure. Porous inserts 4 are located along the heat exchange channels 2, 3, and at the ends of the inserts 4 there are plugs 5 impervious to the heat transfer medium, made in such a way that the heat carrier passes through the porous inserts only in the cross section of the inserts. Heat exchange channels from the cold side of thermoelectric modules are combined into a collector 6. Heat exchange channels from the hot side of thermoelectric modules are combined into collectors 7, 8. The arrows indicate the direction of motion of the heat carrier (liquid).

The operation of the heat exchange unit is as follows. When voltage is applied to thermoelectric modules 1, they begin to generate heat on the one hand and cold on the other. The coolant from the cold side of the thermoelectric module enters the inlet manifold 6, where it is distributed along the channels 2 located along the cold side of the thermoelectric modules 1. In the channels 2, the coolant is cooled passing through the porous inserts 4 and then enters the output collector (not shown) . The coolant passes through the porous channel inserts in the cross section through the use of plugs impermeable to the coolant 5. The coolant from the hot side of the thermoelectric module enters the inlet collector 7, where it is distributed along the channels 3 located along the hot side of the thermoelectric modules 1. In the channels 3, the coolant is heated, passing through porous inserts 4, and then enters the output manifold 8. The coolant passes through the porous channel inserts in cross section through the use of impermeable Mykh heater plugs 5.

The advantage of this heat exchange unit is to increase the efficiency of heat transfer by applying a developed heat transfer surface without significant deterioration of the hydrodynamic flow pattern, also with the constant dimensions of the heat transfer unit.

Thus, the implementation of this utility model leads to increased heat transfer efficiency.

Claims (3)

1. A heat exchange unit based on thermoelectric modules, comprising at least one thermoelectric module, heat exchange channels for hot and cold heat carrier, arranged in such a way that the heat exchange channels of one type are located on the hot side of the thermoelectric module, and the heat exchange channels of another type are located with cold side of the thermoelectric module, characterized in that the internal cavity of the heat exchange channels contain porous inserts forming a developed heat transfer surface. 2. A heat exchange unit based on thermoelectric modules according to claim 1, characterized in that the porous inserts of the internal cavities of the heat exchange channels are made of the same material with the material of the walls of these channels, forming a single monolithic structure. 3. A heat exchange unit based on thermoelectric modules according to claim 1, characterized in that the porous inserts are made in such a way that the heat carrier passes through the porous inserts only in the cross section of the inserts.

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