Multi-branch liquid cooling temperature regulation test box

Abstract

The utility model discloses a multi-branch liquid cooling thermoregulation test box, the multi-branch liquid cooling thermoregulation test box comprises a box body, a cooling water module and a cooling liquid circulation module, the cooling water module and the cooling liquid circulation module are both arranged in the box body, one end of the cooling water module is connected with the cooling liquid circulation module, and the other end of the cooling water module is connected with the cooling liquid circulation module. Therefore, the cooling water module can exchange heat with the cooling liquid circulating module; the cooling water module and the cooling liquid circulation module are connected through a multi-branch pipeline. According to the multi-branch liquid-cooling temperature-regulating test box, the cooling water module and the cooling liquid circulating module are independently integrated in the box body, so that the internal structure of the temperature-regulating test box is simplified, and the overall size of the temperature-regulating test box is effectively reduced, so that the multi-branch liquid-cooling temperature-regulating test box has high use convenience, and meanwhile, the service life of the multi-branch liquid-cooling temperature-regulating test box is prolonged. The device can adapt to sample load ends of simulation environment equipment of various specifications, so that an efficient and stable cooling function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of test chambers, in particular to a multi-branch liquid-cooled temperature-regulating test chamber. Background Art

[0002] An environmental test chamber is a device used to simulate and control different environmental conditions for testing the performance and reliability of products under various environmental conditions. These chambers are commonly used in research laboratories, production environments, and quality control laboratories. The environmental conditions that can be simulated by environmental test chambers include, but are not limited to: Temperature: Environmental test chambers can simulate a wide range of temperature conditions, from extreme low temperatures to extreme high temperatures, to evaluate the performance and stability of products under different temperature conditions. Humidity: Some environmental test chambers have the function of adjusting humidity and can simulate high-humidity or low-humidity environmental conditions to test the performance of products in humid or dry environments. Air pressure: In some applications, environmental test chambers can simulate high-altitude or low-pressure environments to evaluate the performance of products under different air pressure conditions. Vibration and shock: Some environmental test chambers have vibration and shock simulation functions to test the vibration and shock conditions that products are subjected to during transportation or use. Light: Some environmental test chambers can simulate different light conditions to test the light resistance and color stability of products under different light conditions. Environmental test chambers are usually equipped with devices such as temperature controllers, humidity controllers, air pressure controllers, and vibration tables to simulate and control different environmental conditions. They are widely used in various industries, such as electronics, automotive, aerospace, medical, etc., to evaluate the performance, reliability, and durability of products.

[0003] In the existing traditional test chamber field, the wind circulation cooling method is usually used to dissipate heat from the test products, and the heat exchange efficiency is relatively low. However, for high-power heat-generating products (such as chips, motors), the existing test chambers cannot dissipate heat from them quickly and evenly, resulting in a certain temperature difference between the test products and the temperature controlled by the test chamber. At this time, the test products will have the problem of excessive local temperature. In addition, for the control device of the electric drive in new energy vehicles, using a cooling medium can ensure the temperature of the control device, but the aging process at normal temperature is very slow, and it takes a long time to verify the performance and reliability of new products. Moreover, normal temperature testing cannot cover some extreme temperature conditions and cannot verify the performance of the electric drive control device under extreme temperature conditions. Summary of the Utility Model

[0004] Based on this, in view of the technical problem that the existing test chambers have insufficient heat dissipation capacity for the products to be tested, it is necessary to provide a multi-branch liquid-cooled temperature-regulating test chamber.

[0005] A multi-branch liquid cooling temperature control test chamber, which includes a chamber body, a cooling water module, and a coolant circulation module. The cooling water module and the coolant circulation module are both arranged inside the chamber body. Among them, one end of the cooling water module is connected to the coolant circulation module, so that the cooling water module can exchange heat with the coolant circulation module.

[0006] The cooling water module and the coolant circulation module are connected by a multi-branch pipeline.

[0007] The cooling water module includes a refrigeration heat exchanger, a heater, and a liquid storage tank. The liquid storage tank is arranged on the top of the chamber body, and the refrigeration heat exchanger and the heater are both arranged inside the liquid storage tank; the input end of the liquid storage tank is connected to the output end of the coolant circulation module through a pipeline, and moreover, the output end of the liquid storage tank is connected to the input end of the coolant circulation module through a pipeline.

[0008] The coolant circulation module includes a water pump, several first pneumatic angle valves, and several first ball valves; the water pump is arranged at the bottom of the chamber body, that is, the water pump is arranged on the bottom side of the liquid storage tank; the input end of the water pump is connected to the bottom wall of the liquid storage tank through a pipeline, and the output end of the water pump is connected to an externally adapted test chamber sample tooling through several first ball valves; the input ends of several first pneumatic angle valves are connected to an externally adapted test chamber sample tooling through pipelines, and the output ends of several first pneumatic angle valves communicate with the input end of the liquid storage tank.

[0009] In one embodiment, the above-mentioned water pump can be a high-pressure variable-frequency centrifugal water pump.

[0010] In one embodiment, the above-mentioned cooling water module further includes several second ball valves. The several second ball valves are arranged on the top side surface of the chamber body, and moreover, one end of each second ball valve penetrates through the top wall of the chamber body and the liquid storage tank and is connected to the refrigeration heat exchanger through a pipeline.

[0011] In one embodiment, the other ends of the above-mentioned several second ball valves are respectively connected to an external water supply pipe relative to the refrigeration heat exchanger.

[0012] In one embodiment, the above-mentioned cooling water module further includes a first flow regulating valve. The first flow regulating valve is arranged between the second ball valve and the input end of the refrigeration heat exchanger.

[0013] In one embodiment, the above-mentioned coolant circulation module further includes several second flow regulating valves. The several second flow regulating valves correspond to the several first pneumatic angle valves one by one, and moreover, each second flow regulating valve is arranged between the corresponding first pneumatic angle valve and the input end of the liquid storage tank.

[0014] In one embodiment, the above-mentioned coolant circulation module further includes a number of third ball valves, and the number of third ball valves respectively corresponds to a number of first pneumatic angle valves one by one. Moreover, one end of each third ball valve is connected to the input end of the corresponding first pneumatic angle valve through a pipeline, and the other end of each third ball valve is connected to the test box sample tooling adapted to the outside through a pipeline.

[0015] In one embodiment, the above-mentioned coolant circulation module further includes an expansion tank and a make-up water pump, and the expansion tank and the make-up water pump can be respectively arranged at any node of the circulation pipeline of the coolant circulation module.

[0016] In one embodiment, the above-mentioned cooling water module further includes a number of second pneumatic angle valves, and the number of second pneumatic angle valves respectively corresponds to a number of second flow regulating valves one by one. The input end of each second pneumatic angle valve is connected to the corresponding second flow regulating valve through a pipeline, and the output end of each second pneumatic angle valve is connected to the input end of the liquid storage tank through a pipeline.

[0017] In one embodiment, the output end of the above-mentioned water pump is connected with a number of third pneumatic angle valves. The input ends of the number of third pneumatic angle valves are connected to the output end of the water pump through pipelines, and the output ends of the number of third pneumatic angle valves are respectively connected to the input ends of a number of first ball valves.

[0018] In one embodiment, a number of electromagnetic flowmeters are further arranged at the output end of the above-mentioned water pump, and the number of electromagnetic flowmeters respectively corresponds to a number of first ball valves one by one. Each electromagnetic flowmeter is arranged between the corresponding first ball valve and the third pneumatic angle valve.

[0019] In one embodiment, each of the above-mentioned third ball valves is provided with a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are respectively arranged on the side wall of the pipeline between the third ball valve and the first pneumatic angle valve.

[0020] In one embodiment, the above-mentioned multi-branch liquid cooling temperature control test box further includes an electric control box, and the electric control box is electrically connected to the cooling water module and the coolant circulation module respectively.

[0021] The multi-branch liquid-cooled temperature control test chamber disclosed by the present utility model integrates the cooling water module and the coolant circulation module independently inside the chamber. While simplifying the internal structure of the temperature control test chamber, it effectively reduces the overall volume of the temperature control test chamber, enabling the multi-branch liquid-cooled temperature control test chamber to have high usability and adapt to the sample load ends of various specifications of simulated environmental equipment. The multi-branch liquid-cooled temperature control method can greatly improve the heat dissipation and cooling capacity of the test chamber to achieve efficient and stable cooling functions, and further create the required extremely low temperature environment for testing products for product performance testing. Specifically, in the present utility model, the coolant circulation module is used to cool the test chamber sample tooling adapted externally. After the sample is cooled to the preset temperature, the heat-absorbed coolant in the coolant circulation module flows back. The cooling water module is used to cool the heat-absorbed coolant; wherein, the cooling water module and the coolant circulation module are connected by multi-branch pipelines, thereby effectively improving the heat exchange efficiency of the cooling water module for the coolant in the cooling liquid circulation module. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a multi-branch liquid-cooled temperature control test chamber in an embodiment;

[0023] Figure 2 It is a schematic internal structure diagram of a multi-branch liquid-cooled temperature control test chamber in an embodiment;

[0024] Figure 3 It is a schematic internal structure diagram of a multi-branch liquid-cooled temperature control test chamber in an embodiment. Detailed Embodiment

[0025] To make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model is given in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0031] Please refer to Figures 1 to 3 , the present utility model discloses a multi-branch liquid-cooled temperature-controlled test chamber, which includes a box body 1, a cooling water module 2 and a coolant circulation module 3. The cooling water module 2 and the coolant circulation module 3 are both arranged inside the box body 1. Among them, one end of the cooling water module 2 is connected to the coolant circulation module 3, so that the cooling water module 2 can exchange heat with the coolant circulation module 3. The coolant circulation module 3 is used for cooling and temperature reduction of the test chamber sample tooling adapted externally. After the sample is cooled to the preset temperature, the coolant that has absorbed heat in the coolant circulation module 3 flows back. The cooling water module 2 is used for cooling and temperature reduction of the coolant that has absorbed heat. In this embodiment, the cooling water module 2 and the coolant circulation module 3 are connected by a multi-branch pipeline, so as to effectively improve the heat exchange efficiency of the cooling water module 2 for the coolant in the coolant circulation module.

[0032] Specifically, the cooling water module 2 includes a refrigeration heat exchanger 21, a heater 22 and a liquid storage tank 23. The liquid storage tank 23 is arranged on the top of the box body 1, and the refrigeration heat exchanger 21 and the heater 22 are both arranged inside the liquid storage tank 23; the input end of the liquid storage tank 23 is connected to the output end of the coolant circulation module 3 through a pipeline, and moreover, the output end of the liquid storage tank 23 is connected to the input end of the coolant circulation module 3 through a pipeline. During the circulation of the coolant, the coolant that has been heated by heat exchange is input into the liquid storage tank 23 to exchange heat with the refrigeration heat exchanger 21. Among them, the refrigerant in the refrigeration heat exchanger 21 generally uses cooling water, and a refrigerant with similar or higher heat dissipation performance can also be used to exchange heat with the coolant through the refrigeration heat exchanger 21, so as to ensure the cooling efficiency of the cooling water module 2 for the coolant.

[0033] Specifically, the coolant circulation module 3 includes a water pump 31, a number of first pneumatic angle valves 32, and a number of first ball valves 33; the water pump 31 is arranged at the bottom of the box body 1, that is, the water pump 31 is arranged at the bottom side of the liquid storage tank 23; the input end of the water pump 31 is connected to the bottom wall of the liquid storage tank 23 through a pipeline, and the output end of the water pump 31 is connected to the externally adapted test box sample tooling through a number of first ball valves 33; the input ends of the number of first pneumatic angle valves 32 are connected to the externally adapted test box sample tooling through pipelines, and the output ends of the number of first pneumatic angle valves 32 are communicated with the input end of the liquid storage tank 23. During the coolant circulation process, the water pump 31 provides power for the loop, so that the coolant sequentially passes through the liquid storage tank 23, the water pump 31, a number of first ball valves 33, the externally adapted test box sample tooling, a number of first pneumatic angle valves 32 and then returns to the liquid storage tank 23; during this process, the coolant is cooled in the liquid storage tank 23 through the refrigeration heat exchanger 21, heated to the preset temperature through the heater 22, then transported to the externally adapted test box sample tooling through the water pump 31 for heat exchange, and finally returns to the liquid storage tank 23 to complete a coolant circulation. In this embodiment, the water pump 31 can adopt a high-pressure variable-frequency centrifugal water pump 31 to provide sufficient circulating power for the coolant, and the water pump 31 is communicated with the liquid storage tank 23 through a stainless steel connecting pipeline 301.

[0034] Furthermore, the cooling water module 2 further includes a number of second ball valves 24, the number of second ball valves 24 are arranged on the top surface of the box body 1, and one end of each second ball valve 24 penetrates through the box body 1 and the top wall of the liquid storage tank 23 and is connected to the refrigeration heat exchanger 21 through a pipeline. The other ends of the number of second ball valves 24 relative to the refrigeration heat exchanger 21 are respectively connected to an external water supply pipe, so that the cooling water can circulate between the refrigeration heat exchanger 21 and the external water supply pipe through the number of second ball valves 24, thereby ensuring that the cooling water module 2 can continuously cool the coolant as needed.

[0035] Furthermore, the cooling water module 2 further includes a first flow regulating valve 25, and the first flow regulating valve 25 is arranged between the second ball valve 24 and the input end of the refrigeration heat exchanger 21. When the corresponding second ball valve 24 is connected to the external water supply pipe, the cooling water can be sequentially input into the refrigeration heat exchanger 21 from the external water supply pipe through the second ball valve 24 and the first flow regulating valve 25 to exchange heat with the coolant inside the liquid storage tank 23, thereby effectively controlling the flow rate and flow of the cooling water inside the refrigeration heat exchanger 21, and thus controlling the heat exchange efficiency between the cooling water and the coolant.

[0036] Further, the coolant circulation module 3 further includes a plurality of second flow regulating valves 34. The plurality of second flow regulating valves 34 respectively correspond to the plurality of first pneumatic angle valves 32 one by one. Moreover, each second flow regulating valve 34 is disposed between the corresponding first pneumatic angle valve 32 and the input end of the liquid storage tank 23, so that the second flow regulating valve 34 can cooperate with the corresponding first pneumatic angle valve 32 to precisely control the coolant flow rate entering the liquid storage tank 23, and further effectively control the heat exchange efficiency between the coolant and the refrigeration heat exchanger 21.

[0037] Further, the coolant circulation module 3 further includes a plurality of third ball valves 35. The plurality of third ball valves 35 respectively correspond to the plurality of first pneumatic angle valves 32 one by one. And one end of each third ball valve 35 is connected to the input end of the corresponding first pneumatic angle valve 32 through a pipeline, and the other end of each third ball valve 35 is connected to the test chamber sample tooling adapted to the outside through a pipeline. After the coolant completes the heat exchange with the sample, the coolant flows back to the coolant circulation module 3 through the plurality of third ball valves 35 from the external test chamber for cooling. Among them, the third ball valve 35 can control the on-off of the coolant circuit between the external test chamber and the coolant circulation module 3. When an emergency occurs in the coolant circulation module 3, such as a rupture or blockage of the internal pipeline of the coolant circulation module 3, the operator can close the corresponding third ball valve 35 in time to stop the coolant circulation and then carry out maintenance.

[0038] Further, the coolant circulation module 3 further includes an expansion tank 36 and a makeup water pump 37. The expansion tank 36 and the makeup water pump 37 can be respectively disposed at any node of the circulation pipeline of the coolant circulation module 3. Among them, the expansion tank 36 can effectively maintain the circulation pressure of the coolant in the circulation pipeline of the coolant circulation module 3. When the circulation pressure of the coolant in the circulation pipeline is insufficient, the airbag inside the expansion tank 36 expands to increase the circulation pressure of the coolant inside the pipeline. The makeup water pump 37 can supplement the part of the coolant that evaporates and escapes according to actual needs, so as to maintain the coolant storage in the coolant circulation module 3.

[0039] Further, the cooling water module 2 further includes a plurality of second pneumatic angle valves 26. The plurality of second pneumatic angle valves 26 respectively correspond to the plurality of second flow regulating valves 34 one by one. The input end of each second pneumatic angle valve 26 is connected to the corresponding second flow regulating valve 34 through a pipeline, and the output end of each second pneumatic angle valve 26 is connected to the input end of the liquid storage tank 23, so as to further improve the flow control accuracy of the coolant at the input end of the liquid storage tank 23.

[0040] Further, the output end of the water pump 31 is connected with a plurality of third pneumatic angle valves 311. The input pipelines of the plurality of third pneumatic angle valves 311 are connected to the output end of the water pump 31, and the output ends of the plurality of third pneumatic angle valves 311 are respectively connected to the input ends of a plurality of first ball valves 33, so as to improve the flow regulation accuracy between the water pump 31 and the test box sample tooling adapted to the outside.

[0041] Further, a plurality of electromagnetic flowmeters 312 are also arranged at the output end of the water pump 31. The plurality of electromagnetic flowmeters 312 correspond to the plurality of first ball valves 33 one by one, and each electromagnetic flowmeter 312 is arranged between the corresponding first ball valve 33 and the third pneumatic angle valve 311, so as to monitor the coolant flow at the output end of the cooling water module 2 in real time.

[0042] Further, each third ball valve 35 is provided with a pressure sensor 351 and a temperature sensor 352. The pressure sensor 351 and the temperature sensor 352 are respectively arranged on the side wall of the pipeline between the third ball valve 35 and the first pneumatic angle valve 32. Among them, the pressure sensor 351 monitors the fluid pressure at the input end of the first pneumatic angle valve 32 in real time, and the temperature sensor 352 monitors the coolant temperature at the input end of the first pneumatic angle valve 32 in real time, so that the cooling water module 2 can adjust the heat exchange efficiency in real time according to the flow rate and temperature of the coolant during reflux.

[0043] Further, the cooling water module 2 further includes a conductivity meter 27. The conductivity meter 27 is arranged on the surface of a side wall of the liquid storage tank 23 and is connected to the pipeline system of the refrigeration heat exchanger 21, so as to monitor the conductivity of the cooling water in real time.

[0044] Further, the multi-branch liquid cooling temperature control test box further includes an electric control box 4. The electric control box 4 is electrically connected to the cooling water module 2 and the coolant circulation module 3 respectively, so as to realize the automatic control of the cooling water module 2 and the coolant circulation module 3.

[0045] In summary, the multi-branch liquid-cooled temperature control test chamber disclosed by the present utility model integrates the cooling water module and the coolant circulation module independently inside the chamber. While simplifying the internal structure of the temperature control test chamber, it effectively reduces the overall volume of the temperature control test chamber, enabling the multi-branch liquid-cooled temperature control test chamber to have high usability and adapt to the sample load ends of various specifications of simulated environment equipment. The multi-branch liquid-cooled temperature control method can greatly improve the heat dissipation and cooling capacity of the test chamber to achieve an efficient and stable cooling function, and then can create the required extremely low temperature environment for testing products for product performance testing. Specifically, the coolant circulation module in the present utility model is used for cooling the test chamber sample tooling adapted externally. After the sample is cooled to the preset temperature, the coolant that has absorbed heat in the coolant circulation module flows back. The cooling water module is used to cool the coolant that has absorbed heat. Among them, the cooling water module and the coolant circulation module are connected through multi-branch pipelines, thereby effectively improving the heat exchange efficiency of the cooling water module for the coolant in the coolant circulation module.

[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0047] The above-described embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A multi-branch liquid cooling temperature control test box, characterized in that: include: A box body, a cooling water module and a coolant circulation module, wherein the cooling water module and the coolant circulation module are both arranged inside the box body, and one end of the cooling water module is connected to the coolant circulation module, so that the cooling water module can perform heat exchange with the coolant circulation module; The cooling water module and the coolant circulation module are connected via a multi-branch pipeline; The cooling water module includes a refrigeration heat exchanger, a heater and a liquid storage tank, wherein the liquid storage tank is arranged on the top of the box body, and the refrigeration heat exchanger and the heater are arranged inside the liquid storage tank; the input end of the liquid storage tank is connected to the output end pipeline of the coolant circulation module, and the output end of the liquid storage tank is connected to the input end pipeline of the coolant circulation module; The coolant circulation module includes a water pump, several first pneumatic angle valves and several first ball valves; the water pump is arranged at the bottom of the box body; the input end pipeline of the water pump is connected to the bottom wall of the liquid storage tank, and the output end of the water pump is connected to the external adaptive test box sample tooling through several first ball valve pipelines; the input end pipelines of several first pneumatic angle valves are connected to the external adaptive test box sample tooling, and the output end pipelines of several first pneumatic angle valves are connected to the input end of the liquid storage tank.

2. The multi-branch liquid cooling temperature control test box according to claim 1, characterized in that: The cooling water module also includes a plurality of second ball valves, which are arranged on the top side surface of the box body, and one end of each of the second ball valves passes through the box body and the top wall pipeline of the liquid storage tank to be connected to the refrigeration heat exchanger.

3. The multi-branch liquid cooling temperature control test box according to claim 2, characterized in that: The other ends of the plurality of second ball valves relative to the refrigeration heat exchanger are respectively connected to external water supply pipes.

4. The multi-branch liquid cooling temperature control test box according to claim 3, characterized in that: The cooling water module further includes a first flow regulating valve, which is disposed between the second ball valve and an input end of the refrigeration heat exchanger.

5. The multi-branch liquid cooling temperature control test box according to claim 4, characterized in that: The coolant circulation module also includes a plurality of second flow regulating valves, which correspond one-to-one to the plurality of first pneumatic angle valves respectively, and each of the second flow regulating valves is arranged between the corresponding first pneumatic angle valve and the input end of the liquid storage tank.

6. The multi-branch liquid cooling temperature control test box according to claim 5, characterized in that: The coolant circulation module also includes a plurality of third ball valves, which correspond one to one with the plurality of first pneumatic angle valves respectively, and a pipe at one end of each of the third ball valves is connected to the input end of the corresponding first pneumatic angle valve, and a pipe at the other end of each of the third ball valves is connected to an externally adapted test box sample tooling.

7. The multi-branch liquid cooling temperature control test box according to claim 6, characterized in that: The cooling water module also includes a plurality of second pneumatic angle valves, which correspond one-to-one to a plurality of second flow regulating valves respectively. An input end pipe of each second pneumatic angle valve is connected to the corresponding second flow regulating valve, and an output end pipe of each second pneumatic angle valve is connected to the input end of the liquid storage tank.

8. The multi-branch liquid cooling temperature control test box according to claim 7, characterized in that: The output end of the water pump is connected to a plurality of third pneumatic angle valves, the input end pipelines of the plurality of third pneumatic angle valves are connected to the output end of the water pump, and the output ends of the plurality of third pneumatic angle valves are respectively connected to the input ends of the plurality of first ball valves.

9. The multi-branch liquid cooling temperature control test box according to claim 8, characterized in that: The output end of the water pump is also provided with a plurality of electromagnetic flowmeters, which correspond to the plurality of first ball valves one by one, respectively, and each electromagnetic flowmeter is provided between the corresponding first ball valve and the third pneumatic angle valve.

10. The multi-branch liquid cooling temperature control test box according to claim 9, characterized in that: Each of the third ball valves is provided with a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are respectively and correspondingly arranged on the side wall of the pipeline between the third ball valve and the first pneumatic angle valve.

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