A test water tank

Abstract

This utility model discloses a test water tank, comprising a water tank frame assembly, a pressure regulating assembly, an inlet / outlet water assembly, and a cooling assembly. The inlet / outlet water assembly includes a water tank inlet, a water tank outlet, a water tank anti-vortex baffle, a built-in baffle, and a water tank drain. The anti-vortex baffle is connected to the water tank outlet, and the built-in baffle is located inside the water tank frame assembly. The cooling assembly includes a cooling coil, a coil inlet, and a coil outlet. The advantages of this utility model are: the anti-vortex baffle at the water tank outlet, combined with the built-in baffle, effectively prevents the generation of vortices and air bubbles, improving the performance of the tested water pump; the cooling coil inside the water tank accelerates the cooling rate; and the test water tank has strong functional expandability, not only for water pump performance and durability testing, but also for radiator performance testing, thermostat performance testing, and PTC performance testing in thermal management systems.

Description

Technical Field

[0001] This utility model relates to the field of electronic water pump testing technology, specifically a test water tank. Background Technology

[0002] With the increasing severity of energy and environmental issues, clean energy technologies have received global attention and emphasis. To achieve energy conservation and emission reduction goals, the automotive industry is gradually transforming, with the shift from traditional internal combustion engine vehicles to electric vehicles becoming the mainstream trend. Proton exchange membrane fuel cells (PEMFCs) are widely recognized as ideal energy conversion devices for vehicles. However, the thermal management of PEMFCs has always been a significant challenge limiting their commercialization. Abnormal temperatures can drastically reduce the normal operating performance of PEMFCs or even damage related components. The electrochemical reactions, gas-liquid two-phase flow, charge transport, and mass transport processes within PEMFCs are all closely coupled with heat transfer; temperature changes affect all reaction activities. High-power fuel cell thermal management systems are even more complex. How to better evaluate the thermal management testing system during the development phase of a high-power fuel cell system is a crucial issue faced by fuel cell thermal management design engineers. As a core component in the thermal management system, the electric water pump's characteristic curve testing, net positive suction head (NPSH) testing, and durability assessment are of paramount importance.

[0003] When existing testing equipment performs flow tests on high-power electronic water pumps, the sudden change in the flow state of the coolant after being pressurized and accelerated by the electronic water pump can cause eddies and bubbles to form at the water tank outlet, which may be drawn into the water pump inlet. This can result in a low negative pressure in the pipeline, leading to a lack of water at the front end of the water pump and affecting the water pump performance test.

[0004] Based on the flow-head curve of high-power electric water pumps, the water tank volume of the test bench will be larger, usually exceeding 500L. Existing cooling solutions for test benches usually adopt natural cooling or plate heat exchanger cooling. Natural cooling takes a long time, up to half a day or more, which restricts the testing efficiency. Although plate heat exchanger cooling can reduce the cooling time to within 1 hour, the cost is relatively high.

[0005] Patent publication number CN221664937U, entitled "A Test Tank and Test System for an Automotive Electronic Water Pump with Built-in Baffles," discloses a test tank and test system for an automotive electronic water pump with built-in baffles. By placing a first baffle at the inlet of the coolant tank and a second baffle at the outlet, the design of the baffles reduces the errors caused by eddies and air bubbles in the test results, ensuring the accuracy of the electronic water pump's performance parameters. However, this design is only applicable to the testing of automotive electronic water pumps and not to the flow rate testing of high-power electronic water pumps.

[0006] In summary, existing testing equipment is insufficient to address the issues of water tank cooling during high-power electronic water pump flow testing, as well as water shortage at the pump front end caused by vortices forming at the water tank outlet. Utility Model Content

[0007] The technical problem to be solved by this utility model is how to solve the problem of water tank cooling and water shortage at the front end of the pump caused by vortex during the flow test of a high-power electronic water pump, which is difficult to solve with existing testing equipment.

[0008] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A test water tank includes a water tank frame assembly, an adjustment assembly, an inlet / outlet assembly, and a cooling assembly. The inlet / outlet assembly includes a water tank inlet, a water tank outlet, a water tank anti-vortex baffle, a water tank internal baffle, and a water tank drain. The water tank inlet, outlet, and drain are inserted into the main body of the water tank frame assembly. The anti-vortex baffle is connected to the water tank outlet, and the water tank internal baffle is located inside the water tank frame assembly. The cooling assembly includes a cooling coil, a coil inlet, and a coil outlet. The coil outlet and inlet are connected to the cooling coil and are located inside the water tank frame assembly.

[0009] This invention improves the accuracy of water pump performance testing by installing an internal baffle and an anti-vortex baffle inside the water tank to prevent vortices and bubbles from forming at the water outlet. The cooling coil can quickly assist in cooling the water in the tank, further improving the operating efficiency of the test water tank and reducing time costs.

[0010] As a preferred technical solution of this utility model, the water tank anti-vortex baffle includes a circular metal plate, a circular metal plate and multiple rectangular metal plates, wherein the circular metal plate is located on the upper wall, the circular metal plate is located on the lower wall, and the multiple rectangular metal plates are located between the circular metal plate and the circular metal plate, and the rectangular metal plates are arranged in a regular pattern pointing towards the center of the circle, and the central ring of the circular metal plate is fixedly connected to the water outlet of the water tank.

[0011] As a preferred technical solution of this utility model, the built-in baffle of the water tank includes four pieces, which are arranged symmetrically in the middle of the inner side of the water tank and are all in close contact with the cooling coil and the inner wall of the water tank.

[0012] The built-in baffle and anti-vortex baffle of the water tank can effectively reduce the generation of bubbles and vortices in the cooling water inside the water tank.

[0013] As a preferred technical solution of this utility model, both the water tank inlet and the water tank outlet are L-shaped circular pipe components, wherein the water tank inlet is located in the upper part of the water tank, and the water tank outlet is located in the lower part of the water tank, and each has one end of the pipe protruding from the surface of the water tank.

[0014] As a preferred technical solution of this utility model, the water tank drain is located at the bottom of the water tank.

[0015] The water tank drain is located at the bottom of the water tank, which allows for quick replacement of the cooling water inside the tank.

[0016] As a preferred technical solution of this utility model, the water tank frame assembly includes a water tank and a support frame; the water tank is located on the upper part of the support frame and is fixedly connected to the support frame, and the support frame has no less than three supports.

[0017] As a preferred technical solution of this utility model, the water tank volume is not less than 500L.

[0018] The water tank has a large enough volume to meet the testing requirements of high-power electronic water pumps.

[0019] As a preferred technical solution of this utility model, the regulating component includes a water tank vent, a water tank pressure regulating interface, a water tank negative pressure device interface, a water tank water inlet, a water tank air filling interface, a connecting liquid level pipe, a reserved pipe vent, a reserved pipe air filling port, and a reserved pipe drain outlet; wherein the water tank vent, water tank pressure regulating interface, water tank negative pressure device interface, water tank water inlet, and water tank air filling interface are located on the top of the water tank, and the connecting liquid level pipe, the reserved pipe vent, the reserved pipe air filling port, and the reserved pipe drain outlet are located on the side wall of the water tank.

[0020] As a preferred technical solution of this utility model, the connecting liquid level pipe includes two sets, which are respectively located on the two side walls of the water tank.

[0021] As a preferred technical solution of this utility model, the cooling coil adopts a multi-turn spiral winding structure and uses a sanitary grade coil.

[0022] The advantages of this utility model are: 1. The test tank of this application is equipped with an anti-vortex baffle and an internal baffle, which effectively blocks the directional flow of water, further effectively avoiding the error caused by vortices and air bubbles to the test results. At the same time, it can avoid the impact of cavitation on the performance of the tested water pump, and greatly improve the test accuracy of high-power water pumps.

[0023] 2. This application uses a water tank with an integrated cooling coil for temperature reduction. Traditional plate heat exchangers use stainless steel or copper alloy materials for cooling, which, while having high thermal efficiency, requires a corresponding high-efficiency thermal management system, resulting in high cost and a large footprint. The integrated coil water tank solution not only saves space but also significantly reduces costs, lowering design costs by approximately 50%. Furthermore, this application greatly improves testing efficiency compared to traditional natural convection cooling methods.

[0024] 3. The water tank tested in this application has strong scalability. The test system built on the water tank can not only perform performance and durability tests on water pumps, but also, with slight modifications, can be expanded to perform performance tests on radiators, thermostats, and PTCs in the thermal management system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a front view of an embodiment of the present utility model; Figure 3 This is a cross-sectional view of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the anti-vortex baffle structure of the water tank according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the test water tank test system according to an embodiment of the present utility model; Figure 6 This is a test effect diagram of the test water tank in an embodiment of this utility model.

[0026] Numbering on the map: 1. Water tank frame assembly; 11. Water tank; 12. Bracket; 2. Adjustment components; 21. Water tank vent; 22. Water tank reserved pressure regulating interface; 23. Water tank reserved negative pressure device interface; 24. Water tank water inlet; 25. Water tank air inlet; 26. Connecting liquid level pipe; 27. Reserved pipe vent; 28. Reserved pipe air inlet; 29. ​​Reserved pipe drain. 3. Water inlet and outlet components; 31. Water tank inlet; 32. Water tank outlet; 33. Water tank anti-vortex baffle; 34. Water tank internal baffle; 35. Water tank drain outlet; 4. Cooling components; 41. Cooling coil; 42. Coil inlet; 43. Coil outlet. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-4 As shown in the figure, this utility model embodiment discloses a test water tank, including a water tank frame assembly 1, an adjustment assembly 2, an inlet / outlet water assembly 3, and a cooling assembly 4.

[0029] Specifically, the water tank frame assembly 1 includes a water tank 11 and a support frame 12. The water tank 11 is a capsule-shaped metal shell structure with semicircular ends and a cylindrical center, with a volume of not less than 500L, used to store cooling water. The support frame 12 is made of high-strength angle steel of a certain length, with no fewer than three pieces (four are used in this embodiment). The support frame 12 is fixed to the semicircular bottom of the water tank by welding or riveting, allowing the water tank to stand upright. The support feet of the support frame 12 are fixed to the ground with bolts to ensure the stable fixation of the water tank.

[0030] The regulating component 2 includes a water tank vent 21, a water tank reserved pressure regulating interface 22, a water tank reserved negative pressure device interface 23, a water tank water inlet 24, a water tank air filling interface 25, a connecting liquid level pipe 26, a reserved pipe vent 27, a reserved pipe air filling port 28, and a reserved pipe drain 29; wherein the water tank vent 21, the water tank reserved pressure regulating interface 22, the water tank reserved negative pressure device interface 23, the water tank water inlet 24, and the water tank air filling interface 25 are all located on the top of the water tank 11. The water tank vent 21, the water tank reserved pressure regulating interface 22, the water tank reserved negative pressure device interface 23, and the water tank water inlet 24 are all tubular components with one end located inside the water tank 11 and the other end located outside the water tank, and the length outside the water tank is greater than the length inside the water tank; the structure of the water tank air inlet 25 is similar to that of the water tank vent 21, but its diameter is smaller than that of the water tank vent 21, the water tank reserved pressure regulating interface 22, the water tank reserved negative pressure device interface 23, and the water tank water inlet 24. The water tank vent 21 is used for real-time venting during the test. The water tank reserved pressure regulating interface 22 can be connected to the electronic pressure regulator of the test system for pressure regulation in the loop. The water tank reserved negative pressure device interface 23 can be connected to the test system composed of a vacuum pump, switching valve, absolute pressure sensor, etc. By extracting air from the inside of the water tank, the internal pressure of the system is made to meet the test requirements of the pump's net positive suction head and head. The water tank water inlet 24 is used to replenish cooling water in time when the water tank is short of water. The water tank air filling interface 25 is used for pressure regulation inside the water tank. The level connection pipe 26, the reserved pipe vent 27, the reserved pipe air filling port 28, and the reserved pipe drain 29 are all located on the side of the water tank. The level connection pipe 26 includes two sets, located on both sides of the outer side of the water tank 11. Each set includes two level ports, namely an upper level port and a lower level port. Both the upper level port and the lower level port are short pipe structures with one end connected to the inside of the water tank and the other end slightly protruding from the outer surface of the water tank. The upper liquid inlet is located in the upper middle part of the water tank 11, and the lower liquid inlet is located in the lower middle part of the water tank 11. It is connected to the liquid level pipe 26 for monitoring the water level in the water tank 11. The reserved pipe vent 27 consists of two pipes, located on the upper middle part of both sides of the outer surface of the water tank 11, at a similar height to the upper liquid level inlet. One end is located outside the water tank, and the other end connects to the interior of the water tank 11. It can be connected to a test pipe built outside the water tank and is responsible for venting the external pipe. The reserved pipe inflation port 28 is the same component as the reserved pipe vent 27, located a distance below the reserved pipe vent 27, and is connected to the test pipe built outside the water tank. It is responsible for creating negative pressure in the external pipe. The reserved pipe drainage port 29 has a similar structure to the reserved pipe vent 27, located in the lower middle part of the water tank 11, but at a slightly higher height than the lower liquid level inlet. It is connected to the test pipe built outside the water tank and is responsible for draining the external pipe.

[0031] The inlet / outlet assembly 3 includes a water tank inlet 31, a water tank outlet 32, a water tank anti-vortex baffle 33, a water tank internal baffle 34, and a water tank drain 35. Both the water tank inlet 31 and the water tank outlet 32 ​​are L-shaped tubular components, with the main body of the pipe, including the bend, located inside the water tank 11. Only one section of the pipe protrudes from the outer wall of the water tank 11. The water tank inlet 31 is located in the upper middle part of the water tank 11, below the position of the reserved air inlet 28. The water tank outlet 32 ​​is located in the lower middle part of the water tank 11, at a height similar to the lower liquid level port. The water tank inlet 31 is connected to the outlet of the high-power water pump under test and can also be connected in series with flow meters, temperature and pressure sensors, and other testing instruments in the testing system for flow, temperature, and pressure detection. The water tank outlet 32 ​​is connected to the inlet of the high-power water pump under test and can also be connected in series with filters and maintenance valves in the testing system. The water tank anti-vortex baffle 33 is a cylindrical metal component. Its upper wall is a circular metal plate with a central cutout diameter matching the diameter of the water tank outlet 32. The lower wall of the water tank anti-vortex baffle 33 is a circular metal plate without cutouts. The upper and lower walls are connected by several rectangular metal blocks of the same size, all arranged pointing towards the center of the circle. The circular metal plate, the rectangular metal blocks, and the circular metal plate are fixedly connected to form the water tank anti-vortex baffle 33. The water tank outlet 32 ​​is fixed to the cutout on the upper wall of the water tank anti-vortex baffle 33 by welding. The anti-vortex baffle in the water tank, when operating at the water tank outlet 32, uses multiple rectangular metal plates to block the fluid rotation path and disperse energy to suppress vortex formation. The core principle is to disrupt the "rotational momentum" and "pressure difference" conditions that generate the vortex, physically blocking the rotation and directly obstructing the fluid's circular motion around the axis, thus cutting off the vortex's rotation trajectory. The rectangular metal plate structure in the center of the baffle breaks the concentrated flow into multiple disordered small flow streams, consuming the kinetic energy required for fluid rotation, thereby achieving the purpose of preventing vortices. The built-in baffle 34 consists of four rectangular plate-shaped components, symmetrically installed inside the water tank 11, closely attached to the cooling coil 41 and the inner wall of the water tank, providing some support for the cooling coil 41. The built-in baffle 34 also blocks the overall flow path of the cooling water inside the water tank, dispersing energy, and, in conjunction with the anti-vortex baffle 33, further reduces the generation of vortices and foam within the water tank. The water tank drain outlet 35 is located at the bottom of the water tank 11 and is used to drain the cooling water from the water tank.

[0032] The cooling assembly 4 includes a cooling coil 41, a coil inlet 42, and a coil outlet 43. The cooling coil is a DN10 sanitary coil with a spiral winding structure and a calculated minimum of 19 turns (the optimal number of turns is calculated theoretically using the temperature difference between the coolant inlet and outlet and the heat exchange area formula). It is located in the central area of ​​the water tank and connects to the outside of the water tank through the coil inlet 42 and the coil outlet 43. The coil inlet 42 is located at the upper part of the coil, and the coil outlet 43 is located at the lower part of the coil. Both are connected to the coil at one end and located outside the water tank at the other end. During operation, external circulating cooling water is introduced into the coil to remove the heat from the cooling water in the water tank. During this process, due to the temperature difference between the inside and outside of the cooling coil 41, the flow of liquid in the coil will cause water flow disturbance in a local area of ​​the water tank, which will cause the water in the water tank to form a weak convection, achieve uniform temperature stirring, and make the water temperature distribution more uniform. Especially for large-capacity water tanks, it can avoid local water temperature being too high or too low, ensure the consistency of overall water quality and water temperature, and improve the testing performance of the test water tank.

[0033] according to Figure 5 As shown, to further verify the overall performance of the high-power electronic water pump flow test tank of this application, a test system was built around the test tank: The water tank outlet 32 ​​is connected to the inlet of filter Z5001, and a maintenance manual ball valve HV5019 is connected in series. The outlet of filter Z5001 is connected to the inlet of the test pump via a pipeline. The manual ball valve HV5019, connected in series in the pipeline, can coarsely adjust the inlet flow of the test pump. At the same time, pneumatic control valves AV5006 and AV5003 are connected in series in the pipeline to facilitate disassembly of the test device without draining water. The outlet of the test pump is connected back to the water tank inlet 31. A flow meter FM5001 and a flow regulating valve EV5013 are added to the loop. A branch is led out from the loop near the water tank inlet 31, and the manual valve HV5013 is connected to the branch. The flow regulating valve EV is used to adjust the outlet flow of the pump, the flow meter FM5001 is used to measure the real-time flow of the pump, and the manual valve HV5013 helps to vent the gas carried out by the pump in a timely manner. The coil inlet 42 is connected in series with ball valve HV5006 and solenoid valve TM5002, and then connected to the external cooling circulating water inlet. The coil outlet 43 is connected to ball valve HV5032 and connected to the external cooling circulating water outlet. The external cooling circulating water flowing into the coil forms convection with the hot water in the water tank. The flow rate of the external cooling circulating water can be controlled by solenoid valve TM5002. The water tank has a reserved pressure regulating interface 22 to connect to the pressure control valve PV5001 of the test system for pressure regulation in the loop. The water tank has a reserved negative pressure device interface 23 to connect to the negative pressure control system composed of control valve AV5010 and vacuum pump Pump5002. A manual valve HV5017 is connected to the vacuum pump Pump5002, which can manually adjust the drainage of the vacuum pump Pump5002. C01 is a test water tank (tank capacity ≥ 500L). The water tank vent 21 is connected to the quick pressure relief control valve AV5009; the water tank inlet 24 is connected to the water tank water supply control valve AV5008; the liquid level pipe 26 is connected to the water tank liquid level detection system composed of LM5001, LM5002, and LM5003, used to monitor changes in the water level in the tank; the temperature sensor TS5001 and the pressure sensor PT5001 are located at the water pump outlet to measure the water pump outlet temperature and pressure in real time; the temperature sensor TS5010 and the pressure sensor PT5010 are located at the water pump inlet to measure the water pump inlet temperature and pressure in real time; the thermometer TS5007 is used to measure the temperature of water tank 11, and the pressure sensor PT5007 is used to measure the pressure of water tank 11.The water tank temperature can be controlled in real time via the solenoid valve TM5002 at the inlet of the electric heater EH5001 and the coil. To accurately control the temperature of the electric heater EH5001, an external temperature sensor TS5011 is connected to the electric heater EH5001 to monitor the outlet temperature of the electric heater EH5001. HV5030 and HV5034 are bypass and switching manual valves for the heating circuit. HV5001 is the water tank drain valve, externally connected to the water tank drain port 36. HV5007 is the drain valve for the test system pipeline. The electric switch valve EV5005 is for convenient remote automatic drainage and is externally connected to the reserved pipeline drain port 29.

[0034] The temperature control device is connected to the large water tank and the inlet of the tested water pump via a circulation pipeline. First, the temperature control device controls the water pump inlet TS5010 and the water tank temperature TS5007 to simulate the temperature of the medium under different operating conditions during actual operation of the water pump. The circulation pipeline includes a filter Z5001, a flow meter FM5001, a temperature sensor TS5001, a pressure sensor PT5001, and a pressure sensor PT5010. The vacuum device is connected to the top of the large water tank via a pipeline to extract air from the large water tank, ensuring that the pressure inside the system meets the test requirements for the water pump's net positive suction head (NPSH) and head. The vacuum device includes a switching valve AV5010 and a pressure sensor PT5007. The pressure control device is connected to the top of the large water tank via a pipeline to control the pressure inside the water tank and the test bench system using high-pressure gas.

[0035] Combination Figure 6 Experimental results show that, with a water pump flow rate of 150 L / min, the temperature can be controlled from 90℃ to 70℃ in just 5 minutes, with an average cooling rate of 4℃ / min. In contrast, existing test benches with a capacity exceeding 500 L typically employ natural cooling, which takes more than half a day. This invention demonstrates a significantly improved cooling effect.

[0036] This utility model application, by installing an anti-vortex baffle at the water tank outlet, in conjunction with an internal baffle, effectively avoids the generation of vortices and air bubbles, preventing cavitation from affecting the performance of the tested water pump. Furthermore, addressing the slow cooling rate of large-volume test water tanks, this utility model incorporates an economical and efficient cooling coil within the tank, not only accelerating the cooling process but also reducing costs by more than 50% compared to expensive plate heat exchanger structures. In addition, this test water tank offers strong functional expandability; the test system built upon it can not only perform performance and durability tests on water pumps, but with slight modifications, it can be expanded to perform radiator performance tests, thermostat performance tests, and PTC performance tests within thermal management systems, demonstrating its exceptional practicality.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Terms such as "upper," "lower," "left," "right," "front," and "rear" used in the invention are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0038] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A test water tank characterized by: The system includes a water tank frame assembly, an adjustment assembly, an inlet / outlet water assembly, and a cooling assembly. The inlet / outlet water assembly includes a water tank inlet, a water tank outlet, a water tank anti-vortex baffle, a water tank internal baffle, and a water tank drain. The water tank inlet, outlet, and drain are inserted into the main body of the water tank frame assembly. The water tank anti-vortex baffle is connected to the water tank outlet, and the water tank internal baffle is located inside the water tank frame assembly. The cooling assembly includes a cooling coil, a coil inlet, and a coil outlet. The coil outlet and inlet are connected to the cooling coil and are located inside the water tank frame assembly.

2. The test water tank according to claim 1, characterized in that: The water tank anti-vortex baffle includes a circular metal plate, a circular metal plate, and multiple rectangular metal plates. The circular metal plate is located on the upper wall, the circular metal plate is located on the lower wall, and the multiple rectangular metal plates are located between the circular metal plate and the circular metal plate. The rectangular metal plates are arranged in a regular pattern pointing towards the center of the circle, and the central ring of the circular metal plate is fixedly connected to the water outlet of the water tank.

3. A test water tank as claimed in claim 1, wherein: The water tank has four built-in baffles, which are arranged symmetrically in the middle of the inner side of the water tank and are all in close contact with the cooling coil and the inner wall of the water tank.

4. The test water tank of claim 1, wherein: Both the water tank inlet and outlet are L-shaped circular pipe components. The water tank inlet is located in the upper part of the water tank, and the water tank outlet is located in the lower part of the water tank. Each of them has a section of pipe protruding from the surface of the water tank.

5. The test water tank of claim 1, wherein: The drain outlet of the water tank is located at the bottom of the water tank.

6. A test water tank according to claim 1, characterized in that: The water tank frame assembly includes a water tank and a support frame; the water tank is located on the upper part of the support frame and is fixedly connected to the support frame, and there are no fewer than three support frames.

7. A test water tank as claimed in claim 6, characterised in that: The water tank has a volume of not less than 500L.

8. A test water tank according to claim 1, characterized in that: The regulating component includes a water tank vent, a water tank pressure regulating interface, a water tank negative pressure device interface, a water tank water inlet, a water tank air filling interface, a connecting liquid level pipe, a reserved pipe vent, a reserved pipe air filling port, and a reserved pipe drain outlet; wherein the water tank vent, water tank pressure regulating interface, water tank negative pressure device interface, water tank water inlet, and water tank air filling interface are located on the top of the water tank, and the connecting liquid level pipe, reserved pipe vent, reserved pipe air filling port, and reserved pipe drain outlet are located on the side wall of the water tank.

9. A test water tank according to claim 8, characterized in that: The connecting liquid level pipe includes two sets, which are located on the two side walls of the water tank respectively.

10. A test water tank according to claim 1, characterized in that: The cooling coil adopts a multi-turn spiral winding structure and uses sanitary grade coils.

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