Water pump motor performance comparison test bench

Abstract

The utility model discloses a water pump motor performance comparison test bench which comprises a motor control module, a pipeline module and a cooling-water machine module, the motor control module is electrically connected with the pipeline module and the cooling-water machine module, and the cooling-water machine module is in pipeline connection with the pipeline module; the pipeline module comprises a saturator, a first control valve, a second control valve, a filter screen, a connecting pipeline and a test assembly; and the saturator is provided with a water injection port, a third control valve is arranged at the water injection port, and the saturator is connected with the water inlet and the water outlet of the cooling-water machine module through pipelines. According to the scheme, the temperature is controllable, the precision is high, the reliability is high, the stability is strong, the operation is simple, the method can be used for selecting the water pump motor with the optimal performance from a plurality of candidate matched development manufacturers, and the reliability and fairness of a comparison test are ensured at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of performance comparison test, in particular to a water pump motor performance comparison test bench. Background Art

[0002] The statements in this section merely provide background technical information related to the present application and do not necessarily constitute prior art.

[0003] A water pump motor is an electric motor used to drive a water pump. Its main characteristics are high speed and large output power to meet the power requirements of the water pump.

[0004] Among them, there is a high-pressure water pump motor (900 volts) that is used to power the centrifugal water pump in the power compartment of special vehicles, so that the vehicle cooling water system (antifreeze) circulates according to demand, and enables the centrifugal water pump to control the speed according to the received heat dissipation demand, while continuing to work reliably in complex environments. Due to such high requirements, it is necessary to select the water pump motor with the best performance from multiple candidate supporting manufacturers, so it is necessary to organize comparative tests.

[0005] The comparison test needs to provide a fair and just environment for all bidding manufacturers. The test subjects in the comparison test include water pump motor load characteristic test, reliability test, etc. The overall test unit needs to have the test capabilities of these subjects and build a fair and just environment.

[0006] At present, the water pump motor test benches on the market generally have the ability to test the performance indicators of water pump motors such as head, power, and efficiency, but they do not accurately control the water temperature of the medium during the operation of the water pump motor. Direct purchase cannot be used as the test bench for this comparison test. The water pump motor efficiencies of various bidding manufacturers are different, resulting in inconsistent medium water temperatures during the test, which affects the test results of the water pump motor. Specifically, in the process of realizing the utility model, the inventor found that the existing water pump motor test bench has at least the following technical problems:

[0007] 1. During the water pump motor test, the outlet section provided is a real vehicle installation part, and the matching pipeline is a non-standard hose. The hose sold on the market is not completely consistent with the outlet section. The outlet section and the pipeline may not be installed firmly. The excessive pressure in the outlet section may cause the pipeline to loosen, which may cause an accident.

[0008] 2. During the test of the load characteristics of the water pump motor, the motor generates heat when it is running, causing the motor and water temperature to rise, thereby changing the rated output power of the motor and causing inaccurate test results. The existing water pump motor test bench uses air cooling and water temperature control. As the running time of the water pump motor increases, the circulating water temperature rises and cannot be controlled within a certain range, so it is impossible to ensure that each manufacturer is within the same temperature range during testing. At the same time, as the water temperature rises, the output power of the water pump motor decreases and cannot meet the specified index requirements due to changes in the properties of the water fluid and the increase in winding resistance.

[0009] 3. During the water pump motor load characteristic test, the output power of the water pump motor is increased by adjusting the ball valve. The existing water pump motor test bench cannot make the water pump motor output function reach the rated power, and the output power is a veto item for this comparison test. The water pump motor test bench is related to the success or failure of the entire comparison test and is the key to the entire comparison test.

[0010] In view of this, how to design a water pump motor performance comparison test bench that can accurately control the circulating water temperature and match the water pump motors of various manufacturers has become a topic to be studied and solved by the present utility model. Utility Model Content

[0011] The utility model aims to provide a water pump motor performance comparison test bench which can accurately control the circulating water temperature and can match the water pump motors of various manufacturers.

[0012] In order to achieve the above-mentioned purpose, the utility model proposes a water pump motor performance ratio test bench, which is used for the performance ratio test of the water pump motor. The innovative points are:

[0013] The comparison test bench comprises a motor control module, a pipeline module and a chiller module.

[0014] The motor control module is electrically connected to the pipeline module and the chiller module, and the chiller module is pipeline-connected to the pipeline module.

[0015] The pipeline module includes a saturator, a first control valve, a second control valve, a filter, a connecting pipeline, and a test component. A threaded connection portion is added to the outer surface of the outlet section of the water pump motor. The outlet section of the water pump motor is connected to the test component, the filter, the second control valve and the saturator in sequence through the connecting pipeline. The inlet section of the water pump motor is connected to the test component, the first control valve and the saturator in sequence through the connecting pipeline.

[0016] The saturator has a water injection port, a third control valve is arranged at the water injection port, and the saturator is connected to the water inlet and water outlet pipelines of the chiller module.

[0017] The relevant contents of this utility model are explained as follows:

[0018] 1. In the above technical scheme of the utility model, a comparison test is organized to select the water pump motor with the best performance from a number of candidate supporting development manufacturers. However, the water pump motors of the bidding manufacturers have different efficiencies and interfaces, which affects the test results of the water pump motors and also has problems with safety and stability. An innovative design of a water pump motor performance comparison test bench is provided, which is temperature-controllable and adjustable, reliable, high-precision and easy to operate. In the water pump motor performance test bench, the outlet section of the water pump motor is redesigned and optimized. Without changing the inner diameter of the outlet section, a threaded connection part is added to the outer surface of the outlet section and reprocessed to better tighten the connection with the connecting pipe to avoid loosening and accidents. At the same time, for temperature control, a chiller module directly connected to the saturator is set up. The chiller module controls the water temperature of the entire water cycle to ensure that the water temperature is within the same range when each bidding unit conducts the test, and at the same time meets the requirement that the water pump motor is not less than 70°C during the reliability test. In order to meet the power requirements of the water pump motor during operation, a nearly sealed saturator is used instead of an open water storage tank, and a valve switch is added at the water inlet of the saturator. The size is adjusted as needed during operation. The saturator can store the pressure generated by the operation of the water pump motor to reach the rated power.

[0019] 2. In the above technical solution, the test component includes a pressure gauge and a flow meter. The pressure gauge, filter and second control valve are arranged in series between the water pump motor and the saturator; the flow meter and the first control valve are arranged in series between the water pump motor and the saturator. The high-precision pressure gauge and flow meter are used to accurately measure the flow, head, power, efficiency and other parameters of the water pump, thereby ensuring the accuracy and reliability of the test results and avoiding disputes caused by test accuracy.

[0020] 3. In the above technical solution, the first control valve, the second control valve and the third control valve are all ball valves, so as to accurately control the operating pressure of the water pump motor and the saturator during the performance comparison test.

[0021] 4. In the above technical solution, the first control valve, the second control valve and the third control valve are manual control valves, and the staff can manually adjust the relevant flow and pressure to perform relevant control.

[0022] 5. In the above technical solution, the first control valve, the second control valve and the third control valve are electric control valves, which can electrically control the relevant flow and pressure according to the parameters input by the test bench system to realize automated comparative testing.

[0023] 6. In the above technical solution, the chiller module includes a condenser, a drying filter, an expansion valve, an evaporator and a compressor. After the condenser, drying filter, expansion valve, evaporator and compressor are connected in series in sequence, the compressor is then connected to the condenser, so as to provide precise temperature control for the water circulation in the saturator, so as to avoid the inconsistent temperature of the medium water during the test and affect the test results of the water pump motor.

[0024] 7. In the above technical solution, the motor control module includes a high-voltage DC power supply, a voltage-stabilized power supply, a controller, and a multi-functional electrical parameter measuring instrument. The high-voltage DC power supply, the voltage-stabilized power supply, the controller, and the multi-functional electrical parameter measuring instrument are connected in series to the water pump motor in sequence, and the water pump motor is energized using a high-precision programmed DC voltage-stabilized power supply. During the water pump motor test, after the water pump motor runs stably, the test data displayed on the test bench remains stable, and the DC bus voltage, current value and other data are obtained by the multi-functional electrical parameter measuring instrument.

[0025] 8. In the above technical solution, the comparison test bench also includes a recording instrument, which collects, obtains and displays the test data, so as to improve the degree of integration and facilitate the staff to watch and perform subsequent operations.

[0026] 9. In the above technical solution, the comparison test bench also includes a processor, which automatically calculates the results and generates a corresponding test report based on the test data collected by the recording instrument, thereby being equipped with the real-time collection and processing function of the test data, so that the test bench has the function of automatically calculating the results according to the test data and generating a corresponding test report.

[0027] 10. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] 11. In the present utility model, the terms "center", "upper", "lower", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional assembly relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application; if the manual pressure relief valve is turned upside down or placed horizontally, the corresponding orientation should also be adjusted accordingly.

[0029] 12. In the present invention, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] 13. In addition, the term "and / or" in this application means three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution in which both A and B are satisfied.

[0031] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0032] 1. Controllable temperature: The chiller module is used to precisely control the water temperature. The test bench has a controllable and adjustable temperature of -40℃ to +80℃, which can meet the testing requirements of the water pump motor under different temperature conditions. The controllable temperature avoids the impact of temperature on the test results when testing by different manufacturers, and builds a fair and just test environment.

[0033] 2. High precision: The test bench is equipped with high-precision pressure gauges and flow meters to accurately measure the flow, head, power, efficiency and other parameters of the water pump, ensuring the accuracy and reliability of the test results and avoiding disputes caused by test accuracy.

[0034] 3. High reliability: The test bench is equipped with high-quality instruments and meters, and the threaded connection of the outlet section of the pump motor is optimized to avoid the risk of disengagement. It can run continuously for at least 200 hours. The test bench has high reliability and avoids delays in test progress due to test bench failure.

[0035] 4. Strong stability: The water temperature is precisely controlled by the chiller module, and the water pump motor is powered by a high-precision programmed DC regulated power supply. During the water pump motor test, after the water pump motor runs stably, the test data displayed on the test bench remains stable.

[0036] 5. Simple operation: The operation of the test bench is simple and clear, easy to operate and maintain, and easy for testers to get started. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0038] Figure 2 It is a schematic diagram of the outlet section of the water pump motor in the embodiment of the utility model.

[0039] The various parts of the above drawings are shown as follows:

[0040] 1 Motor control module

[0041] 11 High voltage DC power supply

[0042] 2 Pipeline module

[0043] 21 Saturator

[0044] 211 Third control valve

[0045] 22 First control valve

[0046] 23 Second control valve

[0047] 24 Filter

[0048] 25 Connecting pipes

[0049] 26 Test Components

[0050] 261 Pressure gauge

[0051] 262 Flow Meter

[0052] 3 Chiller Module

[0053] 31 Condenser

[0054] 32 Filter drier

[0055] 33 Expansion valve

[0056] 34 Evaporator

[0057] 35 Compressor

[0058] 4 Water pump motor

[0059] 41 Exit Section

[0060] 411 Threaded connection. DETAILED DESCRIPTION

[0061] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0062] The utility model aims to design a water pump motor 4 performance ratio test bench which can accurately control the circulating water temperature and can match the water pump motor 4 of various manufacturers, so as to provide a water pump motor 4 performance ratio test bench with high test accuracy, fairness, stability and reliability.

[0063] The utility model embodiment provides a water pump motor 4 performance ratio test bench, which is used for the performance ratio test of the water pump motor 4, such as Figure 1 As shown, the comparison test bench includes a motor control module 1, a pipeline module 2, and a chiller module 3.

[0064] The motor control module 1 is electrically connected to the pipeline module 2 and the chiller module 3 , and the chiller module 3 is connected to the pipeline module 2 via pipelines.

[0065] The pipeline module 2 includes a saturator 21, a first control valve 22, a second control valve 23, a filter 24, a connecting pipeline 25, and a test component 26. A threaded connection portion 411 is additionally provided on the outer surface of the outlet section 41 of the water pump motor 4. The outlet section 41 of the water pump motor 4 is connected to the test component 26, the filter 24, the second control valve 23 and the saturator 21 in sequence through the connecting pipeline 25. The inlet section of the water pump motor 4 is connected to the test component 26, the first control valve 22 and the saturator 21 in sequence through the connecting pipeline 25.

[0066] The saturator 21 has a water injection port, and a third control valve 211 is arranged at the water injection port. The saturator 21 is connected to the water inlet and the water outlet pipelines of the chiller module 3 .

[0067] Through the implementation of the embodiments of the utility model, a comparison test is organized to select the water pump motor 4 with the best performance from multiple candidate supporting development manufacturers. However, the water pump motor 4 of each bidding manufacturer has different efficiencies and interfaces, which affects the test results of the water pump motor 4 and also has problems with safety and stability. An innovative temperature-controllable and adjustable, reliable, high-precision and easy-to-operate water pump motor 4 performance comparison test bench is designed. In the performance comparison test bench of the water pump motor 4, the outlet section 41 of the water pump motor 4 is redesigned and optimized. Without changing the inner diameter of the outlet section 41, a threaded connection part 411 is added to the outer surface of the outlet section 41 and reprocessed to better fasten the connection with the connecting pipe 25 to avoid loosening and accidents. At the same time, for temperature control, a chiller module 3 directly connected to the saturator 21 is set, and the chiller module 3 is used to control the water temperature of the entire water cycle to ensure that the water temperature is within the same range when each bidding unit is tested, and at the same time, the requirement of not less than 70°C for the water pump motor 4 during reliability testing is met. In order to meet the power requirements of the water pump motor 4 during operation, a saturator 21 with a nearly sealed shape is used instead of an open water storage tank, and a valve switch is added at the water inlet of the saturator 21. The size is adjusted as needed during operation. The saturator 21 can store the pressure generated when the water pump motor 4 is running, so that it reaches the rated power.

[0068] In an embodiment of the utility model, the test component 26 includes a pressure gauge 261 and a flow meter 262. The pressure gauge 261, the filter 24, and the second control valve 23 are arranged in series between the water pump motor 4 and the saturator 21; the flow meter 262 and the first control valve 22 are arranged in series between the water pump motor 4 and the saturator 21. The high-precision pressure gauge 261 and the flow meter 262 are used to accurately measure the flow, head, power, efficiency and other parameters of the water pump, thereby ensuring the accuracy and reliability of the test results and avoiding disputes caused by test accuracy.

[0069] In an embodiment of the utility model, the first control valve 22, the second control valve 23, and the third control valve 211 are all ball valves, so as to accurately control the operating pressure of the water pump motor 4 and the saturator 21 during the performance comparison test.

[0070] In the embodiment of the utility model, the first control valve 22, the second control valve 23, and the third control valve 211 are manual control valves, and the staff can manually adjust the relevant flow and pressure to perform relevant control. The utility model is not limited to this, and the first control valve 22, the second control valve 23, and the third control valve 211 can also be electric control valves, which can electrically control the relevant flow and pressure according to the parameters input by the test bench system to realize automated comparative testing.

[0071] In an embodiment of the utility model, the chiller module 3 includes a condenser 31, a drying filter 32, an expansion valve 33, an evaporator 34 and a compressor 35. After the condenser 31, the drying filter 32, the expansion valve 33, the evaporator 34 and the compressor 35 are connected in series in sequence, the compressor 35 is then connected to the condenser 31, so as to provide precise temperature control for the water circulation in the saturator 21, so as to avoid the temperature of the medium water being inconsistent during the test and affecting the test result of the water pump motor 4.

[0072] In an embodiment of the utility model, the motor control module 1 includes a high-voltage DC power supply 11, a voltage-stabilized power supply, a controller, and a multifunctional electrical parameter measuring instrument. The high-voltage DC power supply 11, the voltage-stabilized power supply, the controller, and the multifunctional electrical parameter measuring instrument are sequentially connected in series to the water pump motor 4, and the water pump motor 4 is energized using a high-precision programmed DC voltage-stabilized power supply. During the test of the water pump motor 4, after the water pump motor 4 runs stably, the test data displayed on the test bench remains stable, and the DC bus voltage, current value and other data are obtained by the multifunctional electrical parameter measuring instrument.

[0073] In an embodiment of the utility model, the comparison test bench also includes a recording instrument, which collects, obtains and displays the test data, thereby improving the degree of integration and facilitating the staff to watch and perform subsequent operations.

[0074] In an embodiment of the utility model, the comparison test bench also includes a processor, which automatically calculates the results and generates a corresponding test report based on the test data collected by the recording instrument, thereby being equipped with real-time test data collection and processing functions, so that the test bench has the function of automatically calculating the results based on the test data and generating a corresponding test report.

[0075] For those of ordinary skill in the art, it is understood that all or any part of the methods and devices disclosed herein can be implemented in hardware, firmware, software, or a combination thereof in any computing device (including processors, storage media, etc.) or a network of computing devices. The hardware can be a general-purpose processor, digital signal processor (DSP), ASIC, field programmable gate array signal (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor can be a microprocessor, but as an alternative, the processor can be any commercially available processor, controller, microcontroller, or state machine. The processor can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration. The software can be present in any form of computer-readable tangible storage medium. By way of example and not limitation, such computer-readable tangible storage media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other tangible media that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. As used herein, disc includes compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc.

[0076] Next, the device of the utility model is specifically described with a detailed embodiment.

[0077] In this detailed embodiment, the water pump motor 4 performance ratio test bench can be used for testing high voltage 900V motors, such as Figure 1 As shown, the test bench consists of three parts: a motor control module 1, a pipeline module 2, and a chiller module 3. The motor control module 1 includes a high-voltage DC power supply 11 for powering and controlling a high-voltage 900V motor, a voltage-stabilized power supply, a controller, and a multimeter (multi-function electrical parameter measuring instrument). The pipeline module 2 consists of a saturator 21, a connecting pipeline 25, a pressure gauge 261, a flow meter 262, a straight valve (a first control valve 22), a ball valve (a second control valve 23), and a filter 24. The chiller consists of a compressor 35, an evaporator 34, a water inlet / outlet, an expansion valve 33, a condenser 31, a drying filter 32, etc.

[0078] In this detailed embodiment, Figure 2 As shown, the outlet section 41 of the water pump motor 4 can be redesigned and optimized according to the drawing. Without changing the inner diameter of the outlet section 41, threads are added to the outer surface of the outlet section 41 and reprocessed. After the connecting pipe 25 (hose) is connected to the outlet section 41, a double-layer clamp is used to tighten it.

[0079] In this detailed embodiment, a power battery chiller is used and connected to the water pump motor 4 test bench to control the water temperature of the entire water cycle. The temperature can be controlled in the range of -40°C to +85°C with a control accuracy of ±0.5°C, ensuring that the water temperature is within the same range when each bidding unit conducts the test, and at the same time meets the requirement that the water pump motor 4 is not lower than 70°C during the reliability test.

[0080] In this detailed embodiment, a nearly sealed saturator 21 is used to replace an open water storage tank, and a valve switch (third control valve 211) is added to the water inlet of the saturator 21. The size is adjusted as needed during operation. The saturator 21 can store the pressure generated by the operation of the water pump motor 4 to reach the rated power.

[0081] In this detailed embodiment, the impeller can be installed at the shaft end of the water pump motor 4, the motor and the volute are fixed in the pipeline by bolts, the motor is connected to the controller, and the controller is connected to the high-precision DC power supply. Fill the saturator 21 with water, adjust the pressure gauge 261 and the flow meter 262 test result display unit, adjust the high-precision DC power supply knob to make it output a 900V voltage value, and power on the motor and the controller after the voltage is reached, and issue a speed command through the controller to make the motor speed reach the specified value. After the water pump motor 4 runs stably, slowly adjust the ball valve to increase the output power of the water pump motor 4. When the output power of the water pump motor 4 reaches the specified value, record the water system flow, head, speed, DC bus voltage, and current value displayed by the instrument, calculate the output rated power and rated efficiency of the water pump motor 4 according to the formula, and keep this state running continuously according to the test conditions, and record the test data at the specified time node. After the test is completed, the tester gradually reduces the motor speed, and when the motor drops to the lowest speed, the power supply is turned off, and the test of the motor test subject is finally completed.

[0082] In this detailed embodiment, the control of parameters such as flow, voltage, and speed can be integrated to provide multiple test procedures such as fixed-point test, timed test, automatic test, and automatic switching of different powers to meet different test requirements. It can also be equipped with real-time test data collection and processing functions, so that the test bench can automatically calculate the results based on the test data and generate corresponding test reports.

[0083] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A water pump motor (4) performance comparison test bench, used for the performance comparison test of the water pump motor (4), characterized in that: The comparison test bench comprises a motor control module (1), a pipeline module (2), and a chiller module (3); The motor control module (1) is electrically connected to the pipeline module (2) and the chiller module (3), and the chiller module (3) is connected to the pipeline module (2) via a pipeline; The pipeline module (2) comprises a saturator (21), a first control valve (22), a second control valve (23), a filter (24), a connecting pipeline (25), and a test assembly (26); a threaded connection portion (411) is additionally provided on the outer surface of the outlet section (41) of the water pump motor (4); the outlet section (41) of the water pump motor (4) is sequentially connected to the test assembly (26), the filter (24), the second control valve (23), and the saturator (21) via the connecting pipeline (25); and the inlet section of the water pump motor (4) is sequentially connected to the test assembly (26), the first control valve (22), and the saturator (21) via the connecting pipeline (25); The saturator (21) has a water injection port, a third control valve (211) is arranged at the water injection port, and the saturator (21) is connected to the water inlet and water outlet pipelines of the chiller module (3).

2. The water pump motor (4) performance comparison test bench according to claim 1 is characterized in that: The test assembly (26) comprises a pressure gauge (261) and a flow meter (262); the pressure gauge (261), the filter (24), and the second control valve (23) are arranged in series between the water pump motor (4) and the saturator (21); and the flow meter (262) and the first control valve (22) are arranged in series between the water pump motor (4) and the saturator (21).

3. The water pump motor (4) performance comparison test bench according to claim 1 is characterized in that: The first control valve (22), the second control valve (23) and the third control valve (211) are all ball valves.

4. The water pump motor (4) performance comparison test bench according to claim 1 is characterized by: The first control valve (22), the second control valve (23) and the third control valve (211) are manually controlled valves or electrically controlled valves.

5. The water pump motor (4) performance comparison test bench according to claim 1 is characterized by: The chiller module (3) comprises a condenser (31), a drying filter (32), an expansion valve (33), an evaporator (34) and a compressor (35); the condenser (31), the drying filter (32), the expansion valve (33), the evaporator (34) and the compressor (35) are sequentially connected in series, and the compressor (35) is then connected to the condenser (31).

6. The water pump motor (4) performance comparison test bench according to claim 1 is characterized by: The motor control module (1) comprises a high-voltage direct current power supply (11), a voltage-stabilized power supply, a controller, and a multifunctional electrical parameter measuring instrument, and the high-voltage direct current power supply (11), the voltage-stabilized power supply, the controller, and the multifunctional electrical parameter measuring instrument are sequentially connected to the water pump motor (4).

7. The water pump motor (4) performance comparison test bench according to claim 6 is characterized by: The test bench also includes a recording instrument, which collects, obtains and displays the test data.

8. The water pump motor (4) performance comparison test bench according to claim 7 is characterized in that: The comparison test bench also includes a processor, which automatically calculates the results and generates a corresponding test report based on the test data collected by the recording instrument.

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