Water purification equipment structure performance detection tool with superposed temperature change

Abstract

The utility model discloses a structural performance detection tool for water purification equipment with superposed temperature changes. The structural performance detection tool comprises a water storage barrel, a water outlet pipe, a high-pressure booster pump, a gas delivery pipe, an air compressor, a proportional valve, a water temperature adjusting device, a total pressure meter, a high-low temperature test box, a water return pipe and a high-pressure relief valve, more than two test positions are arranged in the high and low temperature test box, and each test position is provided with a water inlet interface and a water outlet interface; one end of the water outlet pipe is communicated with the bottom of the water storage barrel, and the other end of the water outlet pipe is divided into more than two water outlet branch pipes connected with the water inlet connector; the high-pressure booster pump, the total pressure meter and the water temperature adjusting device are arranged on the water outlet pipe in front of the branch; one end of the water return pipe is introduced into the water storage barrel, and the other end is branched into two water return branch pipes connected with the water outlet interface; and the high-pressure relief valve is arranged on the water return pipe in front of the branch. According to the tool, temperature changes can be superposed to simulate a real use environment, and various tests such as circulating pressure, hydrostatic pressure and cold water and heat alternating tests can be completed.

Description

Technical Field

[0001] This utility model relates to a testing fixture for the structural performance of a water purification device with superimposed temperature changes, belonging to the field of testing fixture technology. Background Technology

[0002] Structural performance testing of water purification equipment includes circulating pressure testing and hydrostatic pressure testing. These are key testing steps to ensure product safety and durability, and can reflect material fatigue, sealing durability, structural strength, sustained pressure resistance, and instantaneous pressure resistance.

[0003] The circulating pressure test mainly simulates the water pressure fluctuations caused by frequent start-stop cycles (such as turning the faucet on and off) during long-term use of the water purifier. It verifies the stability and sealing of its structure under repeated pressure changes, preventing problems such as leaks at joints and filter shell rupture. The static pressure test examines the water purifier's pressure resistance under continuous high pressure, ensuring that it will not burst or leak in extreme situations (such as a sudden increase in municipal water pressure), thus protecting user safety.

[0004] Existing water hammer blasting machines can only meet the minimum testing requirements, but actual customers will put forward more stringent test requirements, such as superimposing temperature changes (such as alternating hot and cold water) to simulate the real use environment, observing the impact of water hammer impact on water purification equipment under power-on working conditions, and observing whether there are any cracks or leaks when multiple machines are running at the same time. Utility Model Content

[0005] This utility model provides a structural performance testing fixture for water purification equipment with superimposed temperature changes. It can superimpose temperature changes (such as alternating hot and cold water) to simulate the real use environment. Under the power-on working state, it can observe the impact of water hammer and high pressure on the water purification equipment, and observe whether there are any cracks or leaks when multiple devices are running at the same time. It can complete various tests such as circulating pressure, static water pressure and alternating hot and cold water tests.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A fixture for testing the structural performance of a water purification device with superimposed temperature changes includes: a water storage tank, a water outlet pipe, a high-pressure booster pump, a gas delivery pipe, an air compressor, a proportional valve, a water temperature regulating device, a total pressure gauge, a counter, a solenoid valve, a high and low temperature test chamber, a return water pipe, and a high-pressure relief valve;

[0008] The water storage tank is equipped with a cooling module, a heating module, and a stirring device; one end of the water outlet pipe is connected to the bottom of the water storage tank, and the other end branches into two or more water outlet branches. The number of water outlet branches, counters, and solenoid valves are equal and correspond one-to-one. The counters and solenoid valves are located on the corresponding water outlet branches; the high-pressure booster pump, the main pressure gauge, and the water temperature regulating device are arranged sequentially on the water outlet pipes before the branches from upstream to downstream.

[0009] One end of the gas delivery pipe is connected to the outlet of the air compressor, and the other end is connected to the inlet of the high-pressure booster pump. The air compressor is equipped with a compressed air switch, and the proportional valve is located on the gas delivery pipe.

[0010] The high and low temperature test chamber has two or more test positions, each test position has a water inlet and a water outlet; the number of test positions is equal to the number of water outlet branches and they correspond one-to-one, and the water outlet branches are connected to the water inlet of the corresponding test position.

[0011] One end of the return water pipe leads into the water storage tank, and the other end branches into two return water branch pipes. The number of return water branch pipes is equal to the number of test positions and corresponds one-to-one. The return water branch pipe is connected to the water outlet of the corresponding test position. The high-pressure relief valve is located on the return water pipe before the branch.

[0012] The heating module inside the aforementioned water storage tank can be an electric heating module or an electric tube heater, etc.; the cooling module can be a semiconductor cooling chip, etc. Through the cooling and heating modules and the water temperature regulating device inside the water storage tank, dual temperature control can be achieved, improving the accuracy of temperature control and enabling efficient delivery of high-pressure water. A stirring device inside the water storage tank can improve the uniformity of water temperature within the tank.

[0013] The aforementioned air compressor is used in conjunction with a high-pressure booster pump to achieve pressure control. The high-pressure booster pump has a piston structure with two chambers, left and right. High-pressure air is introduced into the left chamber, compressing the water in the right chamber to inject high-pressure water; the pressure is released by releasing gas through the left chamber. The right chamber has an inlet and an outlet, connected to an outlet pipe. Essentially, the outlet pipe is cut to form two ports, connecting to the inlet and outlet of the high-pressure booster pump respectively. The water flowing out of the outlet is the pressurized water.

[0014] The aforementioned water temperature adjustment device is used for secondary adjustment and control of the outlet water temperature to improve the accuracy of test water temperature control and can simulate the temperature under real-world usage conditions in different regions.

[0015] This fixture can superimpose temperature changes (such as alternating hot and cold water) to simulate real-world and extreme environments. It can perform various tests such as circulating pressure, hydrostatic pressure, and alternating hot and cold water. It can also observe the impact of water hammer on water purification equipment while it is powered on, and observe whether there are any cracks or leaks when multiple devices are running simultaneously.

[0016] The upstream-to-downstream direction of this application is consistent with the direction of material (gas, liquid) flow.

[0017] To further improve the accuracy of environmental simulation, the aforementioned fixture for testing the structural performance of the water purification equipment with superimposed temperature changes also includes a humidifier and a humidification supply pipe. The humidifier is located inside the high and low temperature test chamber. One end of the humidification supply pipe is connected to the humidifier, and the other end extends out of the high and low temperature test chamber and connects to the outlet pipe upstream of the high-pressure booster pump. A regulating valve is installed on the humidification supply pipe to regulate the humidity inside the high and low temperature test chamber. The regulating valve is preferably located on the humidification supply pipe outside the high and low temperature test chamber.

[0018] To facilitate power-on observation during testing of some water purifiers, a power interface is provided at the bottom of the high and low temperature test chamber. This is to meet the requirement that some water purifiers need to be powered on throughout the testing process.

[0019] A temperature sensor is also installed on the outlet pipe before the aforementioned branch, and the temperature sensor is located downstream of the water temperature regulating device.

[0020] To improve the accuracy of water pressure control, each outlet branch pipe is equipped with a pressure gauge, and the test pressure of the corresponding device under test can be adjusted by adjusting the corresponding solenoid valve.

[0021] The aforementioned water temperature regulating device can be a heat exchanger or a combined heat and cold unit.

[0022] For ease of control and use, the aforementioned water purification equipment structural performance testing fixture with superimposed temperature changes also includes a PLC control cabinet. The high-pressure booster pump, proportional valve, water temperature regulating device, total pressure gauge, counter, solenoid valve, high and low temperature test chamber, high-pressure relief valve, refrigeration module, heating module, and stirring device are all connected to and controlled by the PLC control cabinet.

[0023] The aforementioned humidifier, regulating valve, temperature sensor, and pressure gauge are all connected to and controlled by the PLC control cabinet (that is, each device can interact with the PLC control cabinet, and the PLC control cabinet can adjust and control the operable devices according to the set and received signals). For testing equipment, such as pressure gauges, the measured data will be transmitted to the PLC control cabinet. For operable devices, such as regulating valves, the PLC control cabinet can adjust and control them according to the set and received signals.

[0024] This application makes no special improvements to the structure or control method of the PLC control cabinet; all aspects are based on the product manual or existing mature technologies, and will not be elaborated here.

[0025] The device under test is a water filter cartridge or a complete water purification system; each device under test corresponds to one test position.

[0026] When the device under test is a water filter cartridge, the water filter cartridge has one inlet and one outlet, that is, it includes an inlet and an outlet. The inlet of the water filter cartridge is connected to the inlet interface of the test position, and the outlet of the water filter cartridge is connected to the outlet interface of the test position, respectively, using connecting pipes.

[0027] When the device under test is a complete water purification system, it also includes a three-way pipe. The complete water purification system includes a water inlet, a pure water outlet, and a wastewater outlet. The water inlet of the complete water purification system is connected to the water inlet interface of the test position using a connecting pipe. The pure water outlet, wastewater outlet, and water outlet interface of the test position of the complete water purification system are connected to the three interfaces of the three-way pipe using connecting pipes respectively.

[0028] The water used for testing is pure water. Both the pure water outlet and the wastewater outlet of the water purification equipment are pure water, which can be directly recycled.

[0029] When the device under test is a water purifier filter cartridge, no power supply is required for testing; when the device under test is a complete water purifier unit, some water purifiers require power supply throughout the testing process.

[0030] During testing, the device under test is installed at the test position. The ambient temperature and humidity of the prototype are controlled by adjusting the temperature and humidity of the high and low temperature test chamber to simulate the real use environment and stabilize for 1 to 3 hours. At the same time, the water storage tank is filled with test water (pure water), and the cooling or heating module and stirring device are turned on. The compressed air switch of the air compressor is turned on, and the air pressure is adjusted by the proportional valve. The test water is sent to the temperature control device through the high-pressure booster pump for further temperature adjustment. Then, it enters the device under test through the outlet branch pipe and is depressurized by the high-pressure relief valve to complete one cycle. The counter records the number of cycles.

[0031] Cyclic pressure resistance test mainly simulates the impact of "water hammer effect" on household water purification equipment. That is, high-pressure water is injected into the device under test by pressurizing (e.g., ~0.4MPa), maintaining high pressure for a few seconds and then depressurizing. For example, pressurizing for 5 seconds and depressurizing for 5 seconds is considered as one cycle. The cycle is repeated 100,000 times or more.

[0032] The hydrostatic pressure test involves maintaining a high pressure of 1.5 to 2 times the maximum working pressure (e.g., 1.0 to 2.0 MPa) or 1.04 MPa for 15 minutes, or sometimes 1 to 2 hours, to observe whether the water purification equipment shows any signs of leakage or rupture. The test pressure is then reached within 5 minutes at a rate not exceeding 0.69 MPa / s by adjusting the proportional valve, and the pressure is maintained.

[0033] Hot and cold water alternation test: According to the test requirements, one alternation of hot and cold water is considered as one cycle. For example, after a 5℃ cold water test, a 50℃ hot water test is considered as one cycle. During each test, the pressurized water (e.g., ~0.4MPa) is adjusted to the required temperature by the temperature control device and injected into the device under test. The high pressure is maintained for a few seconds and then depressurized. For example, pressurize for 5 seconds and depressurize for 5 seconds. This cycle is repeated thousands or tens of thousands of times (e.g., 50,000 times).

[0034] Frequent water pressure fluctuations may cause material fatigue, such as embrittlement of plastic filter housings and wear of sealing rings. During the test, it is necessary to observe and check whether the filter bottles, pipelines, and joints are deformed, leaking, or cracked.

[0035] Existing machines can only test one water purifier, and achieving 100,000 cycles of pressure resistance typically takes about a week, which is inefficient. This application allows for simultaneous testing of multiple water purifiers, significantly improving efficiency.

[0036] Any technologies not mentioned in this utility model are based on existing technologies.

[0037] This utility model presents a water purification equipment structural performance testing fixture with superimposed temperature changes. Through dual temperature control, it ensures the accuracy of the test water temperature and can superimpose temperature changes (such as alternating hot and cold water) to simulate real-world usage environments. While powered on, it allows observation of the effects of water hammer impact and high pressure on the water purification equipment. Simultaneously, multiple devices can be operated to observe for cracks and leaks. It can perform various tests, including circulating pressure, static pressure, and alternating hot and cold water tests. Furthermore, it can accurately simulate the humidity of a real environment, meeting the requirement of continuous power supply during the testing of some water purifiers. When multiple devices are tested simultaneously, the test pressure of each device can be precisely adjusted. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structural performance testing fixture for a water purification device with superimposed temperature changes according to this utility model. Figure 1 ;

[0039] Figure 2 This is a schematic diagram of the structural performance testing fixture for a water purification device with superimposed temperature changes according to this utility model. Figure 2 ;;

[0040] In the diagram, 1 is a water storage tank, 101 is a refrigeration module, 102 is a heating module, 103 is a stirring device, 2 is a water outlet pipe, 3 is a high-pressure booster pump, 4 is a gas delivery pipe, 5 is an air compressor, 501 is a compressed air switch, 6 is a proportional valve, 7 is a water temperature regulating device, 8 is a total pressure gauge, 9 is a counter, 10 is a solenoid valve, 11 is a high and low temperature test chamber, 111 is a test position, 112 is a power interface, 12 is a return water pipe, 13 is a high-pressure relief valve, 14 is a humidifier, 15 is a humidification water supply pipe, 16 is a regulating valve, 17 is a temperature sensor, 18 is a pressure gauge, and 19 is a PLC control cabinet. Detailed Implementation

[0041] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.

[0042] The directional terms used in this application, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," are based on the orientation or positional relationship shown in the accompanying drawings or in the usage state, and are used only for the convenience of describing this application. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The structural schematic diagrams provided in this application should not be construed as absolute limitations on this application.

[0043] Example 1

[0044] like Figure 1 As shown, a structural performance testing fixture for a water purification device with superimposed temperature changes includes: a water storage tank, an outlet pipe, a high-pressure booster pump, a gas delivery pipe, an air compressor, a proportional valve, a water temperature regulating device, a total pressure gauge, a counter, a solenoid valve, a high and low temperature test chamber, a return water pipe, and a high-pressure relief valve.

[0045] The water storage tank is equipped with a cooling module, a heating module, and a stirring device; one end of the water outlet pipe is connected to the bottom of the water storage tank, and the other end branches into two or more water outlet branches. The number of water outlet branches, counters, and solenoid valves are equal and correspond one-to-one. The counters and solenoid valves are located on the corresponding water outlet branches; the high-pressure booster pump, the main pressure gauge, and the water temperature regulating device are arranged sequentially on the water outlet pipes before the branches from upstream to downstream.

[0046] One end of the gas delivery pipe is connected to the outlet of the air compressor, and the other end is connected to the inlet of the high-pressure booster pump. The air compressor is equipped with a compressed air switch, and the proportional valve is located on the gas delivery pipe.

[0047] The high and low temperature test chamber has two or more test positions, each test position has a water inlet and a water outlet; the number of test positions is equal to the number of water outlet branches and they correspond one-to-one, and the water outlet branches are connected to the water inlet of the corresponding test position.

[0048] One end of the return water pipe leads into the water storage tank, and the other end branches into two return water branch pipes. The number of return water branch pipes is equal to the number of test positions and corresponds one-to-one. The return water branch pipe is connected to the water outlet of the corresponding test position. The high-pressure relief valve is located on the return water pipe before the branch.

[0049] The heating module inside the aforementioned water storage tank can be an electric heating module or an electric tube heater, etc.; the cooling module can be a semiconductor cooling chip, etc. Through the cooling and heating modules and the water temperature regulating device inside the water storage tank, dual temperature control can be achieved, improving the accuracy of temperature control and enabling efficient delivery of high-pressure water. A stirring device inside the water storage tank can improve the uniformity of water temperature within the tank.

[0050] The aforementioned air compressor is used in conjunction with a high-pressure booster pump to achieve pressure control. The high-pressure booster pump has a piston structure with two chambers, left and right. High-pressure air is introduced into the left chamber, compressing the water in the right chamber to inject high-pressure water; the pressure is released by releasing gas through the left chamber. The right chamber has an inlet and an outlet, connected to an outlet pipe. Essentially, the outlet pipe is cut to form two ports, connecting to the inlet and outlet of the high-pressure booster pump respectively. The water flowing out of the outlet is the pressurized water.

[0051] This fixture can superimpose temperature changes (such as alternating hot and cold water) to simulate real-world and extreme environments. It can perform various tests such as circulating pressure, hydrostatic pressure, and alternating hot and cold water. It can also observe the impact of water hammer on water purification equipment while it is powered on, and observe whether there are any cracks or leaks when multiple devices are running simultaneously.

[0052] Example 2

[0053] Based on Example 1, the following improvements were made: Figure 1 As shown, to further improve the accuracy of environmental simulation, the aforementioned fixture for testing the structural performance of water purification equipment with superimposed temperature changes also includes a humidifier and a humidification supply pipe. The humidifier is located inside the high and low temperature test chamber. One end of the humidification supply pipe is connected to the humidifier, and the other end extends out of the high and low temperature test chamber and connects to the outlet pipe upstream of the high-pressure booster pump. A regulating valve is installed on the humidification supply pipe to adjust the humidity inside the high and low temperature test chamber. The regulating valve is preferably located on the humidification supply pipe outside the high and low temperature test chamber. To facilitate power-on observation during the testing of some water purifiers, a power interface is provided at the bottom of the high and low temperature test chamber to meet the requirement that some water purifiers need to be powered on throughout the testing process.

[0054] Example 3

[0055] Based on Example 2, the following improvements were made: Figure 1 As shown, a temperature sensor is also installed on the outlet pipe before the branch, located downstream of the water temperature regulating device. To improve the accuracy of water pressure control, a pressure gauge is installed on each outlet branch pipe, and the test pressure of the corresponding device under test can be adjusted by regulating the corresponding solenoid valve. The aforementioned water temperature regulating device can be a heat exchanger or a combined heat and cold unit.

[0056] Example 4

[0057] Based on Example 3, the following improvements were further made: Figure 2 As shown, for ease of control and use, the above-mentioned water purification equipment structural performance testing fixture with superimposed temperature changes also includes a PLC control cabinet, a high-pressure booster pump, a proportional valve, a water temperature regulating device, a total pressure gauge, a counter, a solenoid valve, a high and low temperature test chamber, a high-pressure relief valve, a refrigeration module, a heating module, a stirring device, a humidifier, a regulating valve, a temperature sensor, and a pressure gauge, all of which are connected to and controlled by the PLC control cabinet.

[0058] The device under test is a water filter cartridge or a complete water purification system; each device under test corresponds to one test position.

[0059] When the device under test is a water filter cartridge, the water filter cartridge has one inlet and one outlet, that is, it includes one inlet and one outlet. The inlet of the water filter cartridge is connected to the inlet interface of the test position using a connecting pipe (PP rigid pipe), and the outlet of the water filter cartridge is connected to the outlet interface of the test position.

[0060] When the device under test is a complete water purification system, it also includes a three-way pipe. The complete water purification system includes a water inlet, a pure water outlet, and a wastewater outlet. The water inlet of the complete water purification system is connected to the water inlet interface of the test position using a connecting pipe (PP rigid pipe). The pure water outlet, wastewater outlet, and water outlet interface of the test position of the complete water purification system are connected to the three interfaces of the three-way pipe using connecting pipes (PP rigid pipes).

[0061] The water used for testing is pure water. Both the pure water outlet and the wastewater outlet of the water purification equipment are pure water, which can be directly recycled.

[0062] When the device under test is a water purification filter cartridge, no power supply is required for testing; when the device under test is a complete water purification unit, some water purification equipment requires power supply throughout the testing process. Simply plug the power cord of the complete water purification unit directly into the power interface at the bottom of the high and low temperature test chamber. Each test position in the high and low temperature test chamber has a corresponding power interface.

[0063] During testing, the device under test is installed at the test position. The ambient temperature and humidity of the prototype are controlled by adjusting the temperature and humidity of the high and low temperature test chamber to simulate the real use environment and stabilized for 1 to 3 hours. At the same time, the water storage tank is filled with test water (pure water), and the cooling or heating module and stirring device are turned on as needed. The compressed air switch of the air compressor is turned on, and the air pressure is adjusted by the proportional valve. The test water is sent to the temperature control device through the high-pressure booster pump for further temperature adjustment, and then enters the device under test through the outlet branch pipe. The pressure is then released through the high-pressure relief valve to complete one cycle. The counter records the number of cycles.

[0064] Cyclic pressure resistance test mainly simulates the impact of "water hammer effect" on household water purification equipment. That is, high-pressure water is injected into the device under test by pressurizing (e.g., ~0.4MPa), maintaining high pressure for a few seconds and then depressurizing. For example, pressurizing for 5 seconds and depressurizing for 5 seconds is considered as one cycle. The cycle is repeated 100,000 times or more.

[0065] The hydrostatic pressure test involves maintaining a high pressure of 1.5 to 2 times the maximum working pressure (e.g., 1.0 to 2.0 MPa) or 1.04 MPa for 15 minutes, or sometimes 1 to 2 hours, to observe whether the water purification equipment shows any signs of leakage or rupture. The test pressure is then reached within 5 minutes at a rate not exceeding 0.69 MPa / s by adjusting the proportional valve, and the pressure is maintained.

[0066] Hot and cold water alternation test: According to the test requirements, one alternation of hot and cold water is considered as one cycle. For example, after a 5℃ cold water test, a 50℃ hot water test is considered as one cycle. During each test, the pressurized water (e.g., ~0.4MPa) is adjusted to the required temperature by the temperature control device and injected into the device under test. The high pressure is maintained for a few seconds and then depressurized. For example, pressurize for 5 seconds and depressurize for 5 seconds. This cycle is repeated thousands or tens of thousands of times (e.g., 50,000 times).

[0067] Frequent water pressure fluctuations may cause material fatigue, such as embrittlement of plastic filter housings and wear of sealing rings. During the test, it is necessary to observe and check whether the filter bottles, pipelines, and joints are deformed, leaking, or cracked.

[0068] The above-mentioned water purification equipment structural performance testing fixtures with superimposed temperature changes ensure the accuracy of the test water temperature through dual temperature control. They can superimpose temperature changes (such as alternating hot and cold water) to simulate real-world usage environments. While powered on, they can observe the effects of water hammer impact and high pressure on the water purification equipment. Simultaneously, multiple devices can be operated to observe for cracks and leaks. They can perform various tests, including circulating pressure, static pressure, and alternating hot and cold water tests. Furthermore, they can accurately simulate the humidity of the real environment, meeting the requirement of continuous power supply during the testing of some water purifiers. When multiple devices are tested simultaneously, the test pressure of each device can be precisely adjusted.

Claims

1. A tooling for testing the structural performance of a water purification device under superimposed temperature changes, characterized in that: include: Water storage tank, water outlet pipe, high-pressure booster pump, gas delivery pipe, air compressor, proportional valve, water temperature regulating device, total pressure gauge, counter, solenoid valve, high and low temperature test chamber, return water pipe and high pressure relief valve; The water storage tank is equipped with a cooling module, a heating module, and a stirring device; one end of the water outlet pipe is connected to the bottom of the water storage tank, and the other end branches into two or more water outlet branches. The number of water outlet branches, counters, and solenoid valves are equal and correspond one-to-one. The counters and solenoid valves are located on the corresponding water outlet branches; the high-pressure booster pump, the main pressure gauge, and the water temperature regulating device are arranged sequentially on the water outlet pipes before the branches from upstream to downstream. One end of the gas delivery pipe is connected to the outlet of the air compressor, and the other end is connected to the inlet of the high-pressure booster pump. The air compressor is equipped with a compressed air switch, and the proportional valve is located on the gas delivery pipe. The high and low temperature test chamber has two or more test positions, each test position has a water inlet and a water outlet; the number of test positions is equal to the number of water outlet branches and they correspond one-to-one, and the water outlet branches are connected to the water inlet of the corresponding test position. One end of the return water pipe leads into the water storage tank, and the other end branches into two return water branch pipes. The number of return water branch pipes is equal to the number of test positions and corresponds one-to-one. The return water branch pipe is connected to the water outlet of the corresponding test position. The high-pressure relief valve is located on the return water pipe before the branch.

2. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1, characterized in that: It also includes a humidifier and a humidification water supply pipe. The humidifier is located inside the high and low temperature test chamber. One end of the humidification water supply pipe is connected to the humidifier, and the other end extends out of the high and low temperature test chamber and connects to the water outlet pipe upstream of the high pressure booster pump. A regulating valve is installed on the humidification water supply pipe.

3. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: A power interface is located at the bottom of the high and low temperature test chamber.

4. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: A temperature sensor is also installed on the outlet pipe before the branch, and the temperature sensor is located downstream of the water temperature regulating device.

5. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: Each water outlet branch pipe is equipped with a pressure gauge.

6. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: The water temperature control device is a heat exchanger or a combined heat and cold unit.

7. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: It also includes a PLC control cabinet, a high-pressure booster pump, a proportional valve, a water temperature regulating device, a total pressure gauge, a counter, a solenoid valve, a high and low temperature test chamber, a high-pressure relief valve, a refrigeration module, a heating module, and a stirring device, all of which are connected to and controlled by the PLC control cabinet.

8. The fixture for testing the structural performance of a water purification device under superimposed temperature changes according to claim 1 or 2, characterized in that: The device under test is a water filter cartridge or a complete water purification system; each device under test corresponds to one test position.

9. The fixture for testing the structural performance of a water purification device with superimposed temperature changes according to claim 8, characterized in that: When the device under test is a water filter cartridge, the water filter cartridge includes an inlet and an outlet. The inlet of the water filter cartridge is connected to the inlet interface of the test position, and the outlet of the water filter cartridge is connected to the outlet interface of the test position, respectively, using connecting pipes.

10. The fixture for testing the structural performance of a water purification device with superimposed temperature changes according to claim 8, characterized in that: When the device under test is a complete water purification system, it also includes a three-way pipe. The complete water purification system includes a water inlet, a pure water outlet, and a wastewater outlet. The water inlet of the complete water purification system is connected to the water inlet interface of the test position using a connecting pipe. The pure water outlet, wastewater outlet, and water outlet interface of the test position of the complete water purification system are connected to the three interfaces of the three-way pipe using connecting pipes respectively.

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