CN212098521U - Battery thermal management system - Google Patents

Abstract

The utility model discloses a battery heat management system, including box, the pump body and refrigeration cycle subassembly, the refrigeration cycle subassembly includes compressor, condenser, plate heat exchanger and the pressure expansion valve of end to end series connection, and plate heat exchanger is used for exchanging heat with the coolant liquid, and the pump body communicates with plate heat exchanger, and the pump body is used for inputing the battery package with the coolant liquid, and in the box was located to the compressor, be equipped with first bolster and second bolster between compressor and the box, the relative slope setting of first bolster and second bolster. Above-mentioned battery thermal management system, the pump body can cooperate with the refrigeration cycle subassembly to the battery package cooling, and first bolster and the relative slope setting of second bolster, first bolster all can play the cushioning effect with the second bolster, and just first bolster can the offset with the second bolster, reduces the vibration range of compressor, and then the sustainable cooling that provides the battery package of above-mentioned battery thermal management system, and job stabilization nature is better.

Description

Battery thermal management system

Technical Field

The utility model relates to the field of automotive technology, especially, relate to a battery thermal management system.

Background

With the rapid development of new energy automobiles, the size of the automobile battery pack is larger and larger. The automobile battery is often in a very severe working environment, in order to improve the service life and safety of the battery and ensure efficient and reliable work of the battery, the temperature of the battery needs to be controlled, and a battery thermal management system is produced at the same time. However, the automobile often jolts, so that the battery thermal management system cannot stably work, and even a pipeline is damaged or leaked, thereby affecting the heat dissipation effect.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses lie in overcoming prior art not enough, provide the better battery thermal management system of stability.

The technical scheme is as follows:

the utility model provides a battery thermal management system, includes box, the pump body and refrigeration cycle subassembly, the refrigeration cycle subassembly includes compressor, condenser, plate heat exchanger and the pressure expansion valve of end to end series connection, the pump body with plate heat exchanger intercommunication, the pump body is used for inputing the battery package with the coolant liquid, plate heat exchanger be used for with the coolant liquid heat transfer, the compressor is located in the box, the compressor with be equipped with first bolster and second bolster between the box, first bolster reaches the relative slope of second bolster sets up.

The battery heat management system comprises a compressor, a condenser, a plate heat exchanger and a pressure expansion valve which can be sequentially connected to form a heat pump system with a circulation loop, wherein the plate heat exchanger can be used for exchanging heat with cooling liquid to cool the cooling liquid, the pump body can input the cooled cooling liquid into the battery pack for cooling the battery pack, the compressor is installed in a box body through a first buffer part and a second buffer part, the first buffer part and the second buffer part are arranged in a relatively inclined mode, the first buffer part and the second buffer part can play a buffering role no matter which direction the box body is vibrated in, the first buffer part and the second buffer part can be oppositely flushed, the vibration amplitude of the compressor is reduced, the compressor can be kept to stably work in a vibration environment, the battery heat management system can continuously provide cooling for the battery pack, and the work stability is good.

In one embodiment, the box body is provided with a heat radiation fan, the condenser is arranged in the box body and is opposite to the heat radiation fan, two ends of the condenser are respectively arranged at intervals with two opposite side walls in the box body, and the condenser is connected with the box body through an elastic element.

In one embodiment, the battery thermal management system further includes a heater disposed outside the tank and connected in series with the pump body, and the heater is configured to heat the coolant.

In one embodiment, a first heat exchange pipeline and a second heat exchange pipeline for heat exchange are arranged in the plate heat exchanger, an inlet of the first heat exchange pipeline is communicated with the condenser, and an outlet of the second heat exchange pipeline is communicated with an inlet of the pump body.

In one embodiment, the battery thermal management system further includes a first hose and a second hose, an inlet of the compressor is communicated with the pressure expansion valve through the first hose, and an outlet of the compressor is communicated with the condenser through the second hose.

In one embodiment, the battery thermal management system further includes a connecting member, the connecting member includes a main body portion and an auxiliary portion, the auxiliary portion is disposed on one side of the main body portion, a passage is disposed on the main body portion, two ends of the passage are respectively communicated with the second hose and the condenser, and the auxiliary portion is disposed along a length direction of the passage.

In one embodiment, the battery thermal management system further includes a plate exchange input pipe, a plate exchange output pipe, a low-pressure filling pipe, and a high-pressure filling pipe, the pressure expansion valve is provided with a first inlet, a second inlet, a first outlet, and a second outlet, the first inlet is communicated with the first outlet, the second inlet is communicated with the second outlet, the first inlet is communicated with the condenser, the first outlet is communicated with the inlet of the first heat exchange pipeline through the plate exchange input pipe, the second inlet is communicated with the outlet of the first heat exchange pipeline through the plate exchange output pipe, the low-pressure filling pipe is communicated with the plate exchange output pipe, a condensation output pipe is arranged between the first inlet and the condenser, and the high-pressure filling pipe is communicated with the condensation output pipe.

In one embodiment, the low-pressure filling pipe and the high-pressure filling pipe are both arranged in the box body in a penetrating mode, and the parts, penetrating out of the box body, of the low-pressure filling pipe and the high-pressure filling pipe are both provided with external threads.

In one embodiment, the box body is square, the box body comprises a first side plate, a second side plate, a third side plate and a fourth side plate which are connected end to end, the cooling fan is arranged on the second side plate, the plate heat exchanger is arranged on the first side plate, the compressor is arranged on the third side plate in a leaning mode, the axial direction of the compressor is used for being parallel to a transmission shaft of the vehicle body, and a ventilation hole is formed in the fourth side plate.

In one of them embodiment, above-mentioned battery thermal management system still includes response subassembly, feed liquor pipe and drain pipe, the response subassembly includes entry temperature sensor, export temperature sensor and ambient temperature sensor, the feed liquor pipe with the import intercommunication of second heat transfer pipeline, the drain pipe with the export intercommunication of the pump body, entry temperature sensor is used for the sensing the temperature in the feed liquor pipe, export temperature sensor is used for the sensing temperature in the drain pipe, ambient temperature sensor locates in the box.

Drawings

Fig. 1 is an internal structural view of a battery thermal management system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a refrigeration rotating assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of an assembly of a plate heat exchanger and a body according to an embodiment of the present invention;

fig. 4 is a first schematic structural diagram of a box according to an embodiment of the present invention;

fig. 5 is a second schematic structural diagram of the box according to the embodiment of the present invention.

Description of reference numerals:

100. the refrigeration cycle air conditioner comprises a box body, 110, a first side plate, 120, a second side plate, 130, a third side plate, 140, a fourth side plate, 141, a vent hole, 200, a pump body, 300, a refrigeration cycle component, 310, a compressor, 311, a first buffering component, 312, a second buffering component, 313, a base, 314, a first support, 315, a second support, 320, a condenser, 330, a plate heat exchanger, 340, a pressure expansion valve, 400, a cooling fan, 501, a first hose, 502, a second hose, 503, a plate exchange input pipe, 504, a plate exchange output pipe, 505, a low-pressure filling pipe, 506, a high-pressure filling pipe, 507, an inlet pipe, 508, an outlet pipe, 600, a connecting piece, 710, an inlet temperature sensor, 720 and an outlet temperature sensor.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, the terms "first" and "second" do not denote any particular quantity or order, but are merely used to distinguish names.

In this embodiment, the battery thermal management system is mainly used for cooling the battery pack of the new energy automobile, but in other embodiments, the battery thermal management system may also be used for cooling the batteries of other devices, such as a factory, a storage battery for solar power generation, and the like.

As shown in fig. 1, 2, and 4, an embodiment discloses a battery thermal management system, which includes a box 100, a pump body 200, and a refrigeration cycle assembly 300, where the refrigeration cycle assembly 300 includes a compressor 310, a condenser 320, a plate heat exchanger 330, and a pressure expansion valve 340, which are connected in series end to end, the plate heat exchanger 330 is used for exchanging heat with a coolant, the pump body 200 is communicated with the plate heat exchanger 330, the pump body 200 is used for inputting the coolant into a battery pack, the compressor 310 is disposed in the box 100, a first buffer 311 and a second buffer 312 are disposed between the compressor 310 and the box 100, and the first buffer 311 and the second buffer 312 are disposed in an inclined manner.

In the battery thermal management system, the compressor 310, the condenser 320, the plate heat exchanger 330 and the pressure expansion valve 340 may be sequentially connected to form a heat pump system having a circulation loop, wherein the plate heat exchanger 330 may be configured to exchange heat with a coolant to cool the coolant, the pump body 200 may input the cooled coolant into the battery pack to cool the battery pack, the compressor 310 is installed in the box 100 through the first buffer member 311 and the second buffer member 312, and the first buffer member 311 and the second buffer member 312 are disposed in an inclined manner, so that the first buffer member 311 and the second buffer member 312 may play a role in buffering no matter what direction the box 100 is vibrated, and the first buffer member 311 and the second buffer member 312 may be in opposite-stroke to reduce the vibration amplitude of the compressor 310, so that the compressor 310 may also keep stable operation in a vibration environment, and the battery thermal management system may continuously provide cooling for the battery pack, the stability of the work is better.

Optionally, as shown in fig. 1, the number of the first buffer 311 and the second buffer 312 is at least two, the first buffer 311 and the second buffer 312 are respectively disposed on two sides of the compressor 310, different first buffers 311 are disposed at intervals, and different second buffers 312 are disposed at intervals. More adequate cushioning and shock absorption may be provided to the compressor 310 at this time.

Optionally, as shown in fig. 2, a base 313 is disposed in the box 100, a first bracket 314 and a second bracket 315 are disposed on two sides of the compressor 310, respectively, the first cushion 311 is disposed between the first bracket 314 and the base 313, and the second cushion 312 is disposed between the second bracket 315 and the base 313.

Optionally, the first buffer 311 and the second buffer 312 are both made of rubber materials. The damping effect is good, and the material is durable, can increase of service life.

Optionally, the box body 100 is further provided with a nameplate, a handle and a mounting member, the nameplate and the handle are arranged on the outer side surface of the box body 100, and the mounting member is arranged on the bottom surface of the box body 100. The data plate is used for the display device information, and the convenient transport box 100 of handle, installed part are used for with box 100 fixed mounting. Specifically, the fixing piece is a channel steel, and the fixing piece is used for being welded with a car body of an automobile. The case 100 can be stably mounted to prevent the case from falling off.

Optionally, the plate heat exchanger 330 is jacketed with a heat insulating mat. The heat exchange between the inside and the outside of the plate heat exchanger 330 can be prevented, and the heat exchange in the plate heat exchanger 330 can be fully carried out.

Optionally, a circulation pipeline for circulating heat exchange is arranged in the battery pack, and the pump body 200 conveys the cooled coolant to the circulation pipeline through a pipeline so as to realize heat exchange and temperature reduction.

In one embodiment, as shown in fig. 1, a heat dissipation fan 400 is disposed on the box 100, the condenser 320 is disposed in the box 100 and opposite to the heat dissipation fan 400, two ends of the condenser 320 are spaced from two opposite sidewalls of the box 100, and the condenser 320 is connected to the box 100 through an elastic member. At this time, the heat emitted from the condenser 320 can be directly emitted to the outside of the box 100 through the heat-dissipating fan 400, so that the heat can be better prevented from being accumulated in the box 100, and the working efficiency of the condenser 320 can be improved.

Optionally, two sides of the condenser 320 are respectively provided with a first bending plate and a second bending plate, the two elastic members are respectively a first elastic member and a second elastic member, the first bending plate is connected to one sidewall inside the box 100 through the first elastic member, and the second bending plate is connected to the other sidewall inside the box 100 through the second elastic member. The elastic member may play a role of buffering and shock absorption, so that the condenser 320 can improve stability of the function.

Specifically, the first elastic member and the second elastic member are L-shaped metal plates, one end of each of the L-shaped metal plates is connected to the inner wall of the tank 100, and the other end of each of the L-shaped metal plates is connected to the condenser 320, so that the first elastic member and the second elastic member can generate a certain elastic deformation when the tank 100 vibrates, and the vibration intensity of the condenser 320 is reduced.

Alternatively, the elastic member may be a sealing material, and the periphery of the condenser 320 is connected to the inner wall of the box 100 through the elastic member, so that the wind can only pass through the condenser 320, thereby improving the heat dissipation efficiency of the heat dissipation fan 400.

In other embodiments, the first and second elastic members may also be rubber pads disposed between the first and second bending plates and the inner wall of the box 100. And also can play the role of buffering and shock absorption.

In one embodiment, the battery thermal management system further includes a heater disposed outside the tank 100 and connected in series with the pump body 200, and the heater is configured to heat the coolant. Under the low temperature environment, the heater can heat the coolant and then rise the battery temperature, makes the battery can work in normal condition.

Optionally, the heater is a PTC heater. At the moment, the heating is safe, and the energy is saved.

Specifically, the heater is communicated with the outlet of the pump body 200, and the heating effect of the cooling liquid is ensured by heating the cooling liquid flowing out of the pump body 200.

In one embodiment, as shown in fig. 2 and 3, a first heat exchange pipeline and a second heat exchange pipeline are arranged in the plate heat exchanger 330 for heat exchange, an inlet of the first heat exchange pipeline is communicated with the condenser 320, and an outlet of the second heat exchange pipeline is communicated with an inlet of the pump body 200. At this time, the low-temperature medium passing through the condenser 320 can exchange heat with the cooling liquid in the second heat exchange pipeline to cool the cooling liquid.

In one embodiment, as shown in fig. 2, the battery thermal management system further includes a first hose 501 and a second hose 502, an inlet of the compressor 310 is communicated with the pressure expansion valve 340 through the first hose 501, and an outlet of the compressor 310 is communicated with the condenser 320 through the second hose 502. Because the compressor 310 cannot avoid vibration when the box 100 vibrates, and when the pipes through which the compressor 310 communicates with the outside are hoses, the vibration of the compressor 310 is not transmitted to the components connected to the compressor 310, so that the compressor 310 can be prevented from affecting other components in the box 100, and the stability of the operation of the battery thermal management system is ensured.

Optionally, the first hose 501 and the second hose 502 are both rubber hoses, and at this time, the hoses have stable properties and long service life.

In one embodiment, as shown in fig. 2, the battery thermal management system further includes a connecting member 600, the connecting member 600 includes a main body portion and an auxiliary portion, the auxiliary portion is disposed on one side of the main body portion, a passage is disposed on the main body portion, two ends of the passage are respectively communicated with the second hose 502 and the condenser 320, and the auxiliary portion is disposed along a length direction of the passage. The main body may be axially displaced when connected to the condenser 320, and the auxiliary portion may abut against the condenser 320 to prevent the main body from being displaced, so that the main body is more stably connected to the second hose 502 or the condenser 320, and is less likely to be damaged or leak.

Specifically, the auxiliary portion and the main body portion are equal in length, and both the auxiliary portion and the main body portion are connected to the condenser 320. The leakage and other conditions can be better prevented.

In one embodiment, as shown in fig. 2, the battery thermal management system further includes a plate-exchange input pipe 503, a plate-exchange output pipe 504, a low-pressure filling pipe 505, and a high-pressure filling pipe 506, the pressure expansion valve 340 is provided with a first inlet, a second inlet, a first outlet, and a second outlet, the first inlet is communicated with the first outlet, the second inlet is communicated with the second outlet, the first inlet is communicated with the condenser 320, the first outlet is communicated with the inlet of the first heat exchange pipeline through the plate-exchange input pipe 503, the second inlet is communicated with the outlet of the first heat exchange pipeline through the plate-exchange output pipe 504, the low-pressure filling pipe 505 is communicated with the plate-exchange output pipe 504, a condensation output pipe is provided between the first inlet and the condenser 320, and the high-pressure filling pipe 506 is communicated with the condensation output pipe. The medium temperature and high pressure medium passing through the condenser 320 passes through the pressure expansion valve 340, becomes a low pressure and low temperature medium, and then enters the plate heat exchanger 330 to cool the cooling liquid, and simultaneously, the medium can be added through the low pressure filling pipe 505 and the high pressure filling pipe 506, so that the refrigeration cycle assembly 300 can work normally. Since the medium passes through the plate heat exchange output pipe 504 and is a low-pressure medium, the low-pressure medium is input through the low-pressure filling pipe 505, and the normal operation of the refrigeration cycle assembly 300 is not influenced.

In one embodiment, as shown in FIG. 4, a low pressure fill pipe 505 and a high pressure fill pipe 506 are both disposed through the tank 100, and the portions of the low pressure fill pipe 505 and the high pressure fill pipe 506 that extend out of the tank 100 are both externally threaded. The external threads on the low pressure fill pipe 505 and the high pressure fill pipe 506 allow for a tighter fill pipe to pipe connection without failure of the connection due to vibration.

Optionally, nuts are sleeved on the low-pressure filling pipe 505 and the high-pressure filling pipe 506, and the nuts abut against the outer surface of the box body 100. The vibration of the filling pipe can be reduced, and the installation strength of the filling pipe is improved.

In one embodiment, as shown in fig. 1 and 4, the box 100 is square, the box 100 includes a first side plate 110, a second side plate 120, a third side plate 130, and a fourth side plate 140 connected end to end, the heat dissipation fan 400 is disposed on the second side plate 120, the plate heat exchanger 330 is disposed on the first side plate 110, the compressor 310 is disposed near the third side plate 130, an axial direction of the compressor 310 is configured to be parallel to a transmission shaft of a vehicle body, and the fourth side plate 140 is provided with a ventilation hole 141. At this time, the arrangement of the elements of the box 100 is reasonable, the compressor 310 and the plate heat exchanger 330 are respectively disposed at two sides of the box 100, so that mutual interference can be reduced during operation, and meanwhile, heat in the box 100 can be better blown out from one side of the condenser 320 through the cooling fan 400, thereby improving the cooling efficiency in the box 100. At this time, the wind may enter the box 100 through the fourth side plate 140, the heat dissipation fan 400 is disposed on the second side plate 120, and the second side plate 120 and the fourth side plate 140 are disposed opposite to each other, so that a heat dissipation air channel may be formed between the first side plate 110 and the third side plate 130, and the heat dissipation efficiency in the box 100 may be further improved.

Alternatively, the pump body 200 is coupled with a butt-welded nut on the bottom plate of the case 100 by a screw. So that pump body 200 is firmly mounted.

Optionally, a vent hole is provided on the third side plate 130. At the moment, the air inlet volume can be increased, and the heat dissipation effect is further improved.

In one embodiment, as shown in fig. 3, the battery thermal management system further includes a sensing assembly, a liquid inlet tube 507 and a liquid outlet tube 508, the sensing assembly includes an inlet temperature sensor 710, an outlet temperature sensor 720 and an ambient temperature sensor, the liquid inlet tube 507 is communicated with an inlet of the second heat exchange pipeline, the liquid outlet tube 508 is communicated with an outlet of the pump body 200, the inlet temperature sensor 710 is configured to sense a temperature in the liquid inlet tube 507, the outlet temperature sensor 720 is configured to sense a temperature in the liquid outlet tube 508, and the ambient temperature sensor is disposed in the box 100. The temperature of cooling liquid in the feed liquor pipe 507 is sensed through the inlet temperature sensor 710, the temperature of cooling liquid in the drain pipe 508 is sensed through the outlet temperature sensor 720, the cooling effect on the cooling liquid can be known, the working temperature of the box body 100 can be recorded and detected through the environment temperature sensor, and the overheating of work in the box body 100 is prevented. Therefore, the structure can comprehensively monitor the working state of the battery thermal management system.

Optionally, the outlet of the condenser 320 is connected with the inlet of the first heat exchange pipeline through a steel pipe, so that the strength is high, and the problem that other materials are prone to vibration is solved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a battery heat management system, a serial communication port, includes box, the pump body and refrigeration cycle subassembly, the refrigeration cycle subassembly includes compressor, condenser, plate heat exchanger and the pressure expansion valve of end to end series connection, the pump body with plate heat exchanger intercommunication, the pump body is used for packing coolant liquid input battery, plate heat exchanger be used for with the coolant liquid heat transfer, the compressor is located in the box, the compressor with be equipped with first bolster and second bolster between the box, first bolster reaches the relative slope of second bolster sets up.

2. The battery thermal management system according to claim 1, wherein a heat dissipation fan is disposed on the box, the condenser is disposed in the box and opposite to the heat dissipation fan, two ends of the condenser are spaced from two opposite side walls of the box, and the condenser is connected to the box through an elastic member.

3. The battery thermal management system of claim 2, further comprising a heater disposed outside the tank and in series with the pump body, the heater configured to heat the coolant.

4. The battery thermal management system according to claim 3, wherein a first heat exchange pipeline and a second heat exchange pipeline are arranged in the plate heat exchanger for heat exchange, an inlet of the first heat exchange pipeline is communicated with the condenser, and an outlet of the second heat exchange pipeline is communicated with an inlet of the pump body.

5. The battery thermal management system of claim 4, further comprising a first hose and a second hose, wherein an inlet of the compressor is in communication with the pressure expansion valve through the first hose, and an outlet of the compressor is in communication with the condenser through the second hose.

6. The battery thermal management system of claim 5, further comprising a connecting member, wherein the connecting member comprises a main body portion and an auxiliary portion, the auxiliary portion is disposed on one side of the main body portion, a passage is disposed on the main body portion, two ends of the passage are respectively communicated with the second hose and the condenser, and the auxiliary portion is disposed along a length direction of the passage.

7. The battery thermal management system according to claim 5, further comprising a plate exchange input pipe, a plate exchange output pipe, a low-pressure filling pipe and a high-pressure filling pipe, wherein the pressure expansion valve is provided with a first inlet, a second inlet, a first outlet and a second outlet, the first inlet is communicated with the first outlet, the second inlet is communicated with the second outlet, the first inlet is communicated with the condenser, the first outlet is communicated with the inlet of the first heat exchange pipeline through the plate exchange input pipe, the second inlet is communicated with the outlet of the first heat exchange pipeline through the plate exchange output pipe, the low-pressure filling pipe is communicated with the plate exchange output pipe, a condensation output pipe is arranged between the first inlet and the condenser, and the high-pressure filling pipe is communicated with the condensation output pipe.

8. The battery thermal management system according to claim 7, wherein the low-pressure filling pipe and the high-pressure filling pipe are both inserted into the box body, and the parts of the low-pressure filling pipe and the high-pressure filling pipe penetrating out of the box body are both provided with external threads.

9. The battery thermal management system according to claim 4, wherein the box body is square, the box body comprises a first side plate, a second side plate, a third side plate and a fourth side plate which are connected end to end, the cooling fan is arranged on the second side plate, the plate heat exchanger is arranged on the first side plate, the compressor is arranged close to the third side plate, the axial direction of the compressor is used for being arranged in parallel with a transmission shaft of a vehicle body, and a ventilation hole is formed in the fourth side plate.

10. The battery thermal management system of claim 4, further comprising a sensing assembly, a liquid inlet pipe and a liquid outlet pipe, wherein the sensing assembly comprises an inlet temperature sensor, an outlet temperature sensor and an ambient temperature sensor, the liquid inlet pipe is communicated with an inlet of the second heat exchange pipeline, the liquid outlet pipe is communicated with an outlet of the pump body, the inlet temperature sensor is used for sensing the temperature in the liquid inlet pipe, the outlet temperature sensor is used for sensing the temperature in the liquid outlet pipe, and the ambient temperature sensor is arranged in the box body.

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