System and method for testing solenoid valves and magnetic pumps

Abstract

A system and method for testing solenoid valves and magnetic pumps are provided. According to an embodiment of the present disclosure, a heat transfer fluid flows through a magnetic drive pump in a main fluid circuit for testing a motor-magnetic drive pump and in a fluid branch for testing a solenoid valve, the magnetic drive pump being driven by a motor, a storage tank used for storing heat conduction fluid, a magnetic pump, a pressure sensor used for measuring the outlet fluid pressure of the magnetic pump, a first flow sensor used for measuring the outlet fluid flow of the magnetic pump and a pressure regulator used for regulating the outlet fluid pressure of the magnetic pump are connected through guide pipes to form a fluid main loop. A solenoid valve and a second flow sensor for measuring an outlet fluid flow of the solenoid valve are located in the fluid branch, the method comprising: evaluating performance of the motor-magnetic pump by determining a load current ratio (LCR) of the motor-magnetic pump; and evaluating the performance of the solenoid valve by acquiring the outlet fluid flow of the solenoid valve.

Description

Technical Field

[0001] The present disclosure relates generally to the field of semiconductor device testing technology, and more particularly, to a system and method for testing solenoid valves and magnetic pumps. Background Art

[0002] During the semiconductor device testing process, in order to simulate the working environment of the semiconductor device, the semiconductor device to be tested usually needs to be heated (for example, heated to 80°C). In order to better conduct heat, the heat transfer fluid circulates in the tester. Usually, a magnetic pump is used to provide the kinetic energy required for the flow of the heat transfer fluid in the entire tester, and a solenoid valve is used to control the amount of heat transfer fluid transmitted to each semiconductor device to be tested (for example, CPU).

[0003] The magnetic pump is driven by a motor. During use, the long-term friction between the motor's commutator and the brush will cause the commutator diameter to become smaller and the brush's spring force to be insufficient, which will lead to the attenuation of the motor speed. Similarly, the gears in the magnetic pump will have a larger gap due to long-term friction, which will lead to a reduction in the heat transfer fluid pumped.

[0004] In addition, if Figure 1 As shown in FIG. 1 , the amount of heat transfer fluid flowing through the pipe 130 of the solenoid valve 100 is controlled by “blocking” the opening 140 in the pipe 130 of the solenoid valve 100 with the tip 120 disposed at the end of the magnetic core 110 of the solenoid valve 100. During the semiconductor device testing process, the long-term power-on of the solenoid valve 100 causes the magnetic core 110 to heat up, which in turn causes the tip 120, which is usually made of plastic, to expand. This causes the opening 140 to be “blocked” by the tip 120 when the tip 120 needs to be away from the opening 140 to make the pipe 130 unblocked, even if the tip 120 has been shortened.

[0005] Due to the above reasons, the solenoid valves and magnetic pumps used in the test machine often have problems. When the test machine stops working for unknown reasons, the solenoid valves and magnetic pumps used to transmit the heat transfer fluid in the test machine are usually replaced. In order to save costs, the replaced solenoid valves and magnetic pumps need to be tested to determine whether they really have problems, and the unqualified solenoid valves and magnetic pumps are repaired and put back into use. However, before reusing these solenoid valves and magnetic pumps, they still need to be tested to ensure that the repaired solenoid valves and magnetic pumps are fully qualified.

[0006] Therefore, a system and method for testing solenoid valves and magnetic pumps is needed, which can quickly and accurately evaluate the performance of the solenoid valves and magnetic pumps to ensure that they can work continuously and effectively, improve production efficiency and reduce costs. Summary of the invention

[0007] According to an embodiment of the present disclosure, a system for testing a solenoid valve and a magnetic pump is provided, comprising: a storage tank for storing a heat transfer fluid, the heat transfer fluid flows through the magnetic pump in a fluid main circuit for testing a motor-magnetic pump and a fluid branch circuit for testing the solenoid valve, the magnetic pump being driven by the motor; a pressure sensor for measuring the outlet fluid pressure of the magnetic pump; a first flow sensor for measuring the outlet fluid flow of the magnetic pump; a pressure regulator for regulating the outlet fluid pressure of the magnetic pump; a current sensor for measuring the working current of the motor; a heater for heating the solenoid valve; a second flow sensor, The second flow sensor is used to measure the outlet fluid flow of the solenoid valve; and a control unit, the control unit is used to control the operation of the motor, the current sensor, the pressure sensor, the first flow sensor, the pressure regulator, the solenoid valve, the second flow sensor and the heater, wherein the storage tank, the magnetic pump, the pressure sensor, the first flow sensor, and the pressure regulator are connected by a conduit to form the fluid main circuit, and the solenoid valve and the second flow sensor are located in the fluid branch; and wherein the control unit is configured to evaluate the performance of the motor-magnetic pump by determining the load current ratio LCR of the motor-magnetic pump, and to evaluate the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve.

[0008] In one embodiment, the system further comprises a first temperature sensor for measuring the temperature of the magnetic pump and a second temperature sensor for measuring the temperature of the solenoid valve.

[0009] In one embodiment, the control unit is further configured to evaluate the stability of the motor-magnetic pump by comparing the temperature of the magnetic pump and the operating current of the motor with a first threshold and a second threshold, respectively, wherein the first threshold and the second threshold are associated with the model of the motor-magnetic pump.

[0010] In one embodiment, the load current ratio LCR is calculated by the following equation:

[0011]

[0012] Wherein, I is the working current of the motor, P is the load pressure of the motor-magnetic pump, and I const It is the average working current of the motor when the motor-magnetic pump is unloaded.

[0013] In one embodiment, if the load current ratio LCR is within a predetermined range, the control unit determines that the motor-magnetic pump can work normally; and if the load current ratio LCR is not within the predetermined range, the control unit determines that the motor-magnetic pump cannot work normally, and the predetermined range is associated with the model of the motor-magnetic pump.

[0014] In one embodiment, evaluating the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve includes: heating the solenoid valve to a first temperature by the heater; measuring the outlet fluid flow of the solenoid valve at the first temperature for a first time; and comparing the outlet fluid flow of the solenoid valve with a third threshold to evaluate the performance of the solenoid valve, wherein the third threshold is associated with the solenoid valve model.

[0015] In one embodiment, if the outlet fluid flow rate of the solenoid valve is greater than or equal to the third threshold value, the control unit determines that the solenoid valve can work normally; and if the outlet fluid flow rate of the solenoid valve is less than the third threshold value, the control unit determines that the solenoid valve cannot work normally.

[0016] In one embodiment, the system further comprises a display for displaying test results of the solenoid valve and the magnetic pump.

[0017] According to an embodiment of the present disclosure, a method for testing a solenoid valve and a magnetic pump is provided, wherein a heat transfer fluid flows through the magnetic pump in a fluid main circuit for testing a motor-magnetic pump and a fluid branch circuit for testing the solenoid valve, the magnetic pump is driven by the motor, and a storage tank for storing the heat transfer fluid, the magnetic pump, a pressure sensor for measuring the outlet fluid pressure of the magnetic pump, a first flow sensor for measuring the outlet fluid flow of the magnetic pump, and a pressure regulator for regulating the outlet fluid pressure of the magnetic pump are connected through a conduit to form the fluid main circuit, the solenoid valve and a second flow sensor for measuring the outlet fluid flow of the solenoid valve are located in the fluid branch circuit, and the method comprises: evaluating the performance of the motor-magnetic pump by determining the load current ratio LCR of the motor-magnetic pump; and evaluating the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve.

[0018] In one embodiment, the method further comprises evaluating the stability of the motor-magnetic pump by comparing the temperature of the magnetic pump and the operating current of the motor with a first threshold and a second threshold, respectively, wherein the first threshold and the second threshold are associated with the model of the motor-magnetic pump.

[0019] In one embodiment, the load current ratio LCR is calculated by the following equation:

[0020]

[0021] Wherein, I is the working current of the motor, P is the load pressure of the motor-magnetic pump, and I const It is the average working current of the motor when the motor-magnetic pump is unloaded.

[0022] In one embodiment, evaluating the performance of the motor-magnetic pump includes: if the load current ratio LCR is within a predetermined range, determining that the motor-magnetic pump can work normally; and if the load current ratio LCR is not within the predetermined range, determining that the motor-magnetic pump cannot work normally, and the predetermined range is associated with the model of the motor-magnetic pump.

[0023] In one embodiment, evaluating the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve includes: heating the solenoid valve to a first temperature by a heater; measuring the outlet fluid flow of the solenoid valve at the first temperature for a first time; and comparing the outlet fluid flow of the solenoid valve with a third threshold to evaluate the performance of the solenoid valve, wherein the third threshold is associated with the solenoid valve model.

[0024] In one embodiment, evaluating the performance of the solenoid valve includes: if the outlet fluid flow of the solenoid valve is greater than or equal to the third threshold, determining that the solenoid valve can work normally; and if the outlet fluid flow of the solenoid valve is less than the third threshold, determining that the solenoid valve cannot work normally.

[0025] According to an embodiment of the present disclosure, there is provided a computer readable medium storing a computer program comprising instructions which, when executed by a control unit, cause the control unit to be configured to perform the method according to the present invention.

[0026] According to an embodiment of the present disclosure, a computer program product for testing a solenoid valve and a magnetic pump is provided, comprising a computer program code executable by a processor, wherein the computer program code is used to execute the method according to the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and enable those skilled in the relevant art to make and use the present disclosure.

[0028] Figure 1A schematic diagram of the internal structure of a solenoid valve used to transmit a heat transfer fluid in a testing machine is shown;

[0029] Figure 2 A schematic diagram of a system for testing a solenoid valve and a magnetic pump according to an embodiment of the present disclosure is shown;

[0030] Figure 3 A flow chart showing a method for testing a solenoid valve and a magnetic pump according to an embodiment of the present disclosure is shown;

[0031] Figure 4 A flow chart showing the method of evaluating the performance of a motor-magnetic pump by determining a load current ratio LCR of the motor-magnetic pump according to an embodiment of the present disclosure; and

[0032] Figure 5 A flow chart of evaluating the performance of a solenoid valve by obtaining the outlet fluid flow rate of the solenoid valve according to an embodiment of the present disclosure is shown.

[0033] Various embodiments will be described with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The function and arrangement of the elements discussed can be changed without departing from the scope of protection of the present disclosure. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in an order different from the described order, and various steps can be added, omitted or combined. In addition, the features described relative to some examples can also be combined in other examples.

[0035] It should be noted that the references to "one embodiment", "embodiment", "some embodiments" and the like in the specification indicate that the described embodiments may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such expressions do not necessarily refer to the same embodiment. In addition, when specific features, structures or characteristics are described in conjunction with an embodiment, it should be within the knowledge of technicians in the relevant field to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0036] As mentioned above, due to various reasons, problems often occur in the solenoid valves and magnetic pumps used to transmit heat transfer fluids in the test machine. For this reason, it is necessary to be able to quickly and accurately detect the replaced solenoid valves and magnetic pumps and the solenoid valves and magnetic pumps after repair to ensure that they can work continuously and effectively, improve production efficiency and reduce costs. The study found that the performance of the motor-magnetic pump can be evaluated by determining the load current ratio of the motor-magnetic pump, and the performance of the solenoid valve can be evaluated by obtaining the outlet fluid flow of the solenoid valve at the simulated ambient temperature. Based on this, a system is designed that can quickly and accurately test the solenoid valve and magnetic pump at the same time.

[0037] Embodiments of a system and method for testing a solenoid valve and a magnetic pump according to embodiments of the present disclosure will now be described with reference to the accompanying drawings.

[0038] Figure 2 A schematic diagram of a system 200 for testing a solenoid valve and a magnetic pump according to an embodiment of the present disclosure is shown.

[0039] like Figure 2 As shown in , the system 200 includes a storage tank 201, a magnetic pump 202, a motor 203, a temperature sensor 204, a pressure sensor 205, a flow sensor 206, a pressure regulator 207, a solenoid valve 208, a heater 209, a temperature sensor 210, a flow sensor 211, a current sensor 212, a control unit 213 and a display 214.

[0040] exist Figure 2 In the system 200 shown, the storage tank 201, the magnetic pump 202, the pressure sensor 205, the flow sensor 206, and the pressure regulator 207 are connected by the conduit 215 to form a fluid main circuit M1 for testing the performance of the motor-magnetic pump. In the system 200, a fluid branch M2 for testing the performance of the solenoid valve 208 is also included. In the fluid branch M2, the kinetic energy required for pumping the heat transfer fluid is provided by the magnetic pump 202. The fluid starts from the storage tank 201, passes through the pressure sensor 205, the flow sensor 206, the solenoid valve 208 and the flow sensor 211, and finally returns to the storage tank 201. In other words, the storage tank 201, the magnetic pump 202, the pressure sensor 205, and the flow sensor 206 are both in the fluid main circuit M1 and in the fluid branch M2.

[0041] exist Figure 2 In the system 200 shown, the storage tank 201 can be used to store the heat transfer fluid used in the test machine when testing the semiconductor device. In one embodiment, the heat transfer fluid can include propylene glycol, for example, but the present disclosure is not limited thereto. Figure 2When the system 200 shown in FIG. 1 tests the magnetic pump 202 and the solenoid valve 208, the heat transfer fluid can flow in the fluid main circuit M1 for testing the motor 203-magnetic pump 202 and the fluid branch M2 for testing the solenoid valve 208 by the kinetic energy provided by the magnetic pump 202, wherein the magnetic pump 202 is driven by the motor 203. In the present disclosure, the motor and the magnetic pump are used in conjunction with each other, so they can be regarded as one.

[0042] The pressure sensor 205 can be used to measure the outlet fluid pressure P of the magnetic pump 202, and the flow sensor 206 can be used to measure the outlet fluid flow of the magnetic pump 202. According to an embodiment of the present disclosure, the positions of the pressure sensor 205 and the flow sensor 206 can be interchanged.

[0043] The pressure regulator 207 can be used to adjust the outlet fluid pressure P of the magnetic pump 202. According to an embodiment of the present disclosure, the pressure sensor 205 is disposed at the front end of the pressure regulator 207. That is, the pressure sensor 205 is disposed between the magnetic pump 202 and the pressure regulator 207. In one embodiment, the fluid pressure between the magnetic pump 202 and the pressure regulator 207 can be adjusted by adjusting the valve opening of the pressure regulator 207. In addition, Figure 2 In the system 200 shown, the fluid branch M2 for testing the solenoid valve 208 is branched out from the node N at the front end of the pressure regulator 207, so the fluid pressure between the node N and the solenoid valve 208 is the same as the fluid pressure between the magnetic pump 202 and the pressure regulator 207.

[0044] The current sensor 212 can be used to measure the operating current of the motor 203 , and can measure the operating temperature of the magnetic pump 202 through, for example, a temperature sensor 204 located on the base of the magnetic pump 202 .

[0045] The heater 209 is used to heat the solenoid valve 208 to simulate the working environment temperature of the solenoid valve 208. In addition, the temperature of the solenoid valve 208 can be measured by a temperature sensor 210 disposed in the cavity of the solenoid valve 208. According to an embodiment of the present disclosure, the control unit 213 can adjust the working current and heating time of the heater 209 based on the temperature feedback received from the temperature sensor 210, so as to stabilize the temperature of the solenoid valve 208 within a predetermined range, for example, within a range of 80°C±2°C.

[0046] exist Figure 2 In the system 200 shown, the flow sensor 211 is disposed at the rear end of the solenoid valve 208. Therefore, the flow sensor 211 can measure the outlet fluid flow Q of the solenoid valve 208.

[0047] exist Figure 2In the system 200 shown, the control unit 213 can control various operations of the motor 203, the current sensor 212, the pressure sensor 205, the flow sensor 206, the pressure regulator 207, the solenoid valve 208, the flow sensor 211, and the heater 209. For example, the control unit 213 can adjust the valve opening of the pressure regulator 207 through the measurement value received from the flow sensor 206, thereby adjusting the outlet fluid pressure P of the magnetic pump 202.

[0048] exist Figure 2 In the system 200 shown, the control unit 213 can evaluate the performance of the motor-magnetic pump by determining the load current ratio LCR of the motor-magnetic pump of the system 200 and evaluate the performance of the solenoid valve 208 by obtaining the outlet fluid flow Q of the solenoid valve 208 at the simulated ambient temperature. In addition, the control unit 213 can also evaluate the stability of the motor-magnetic pump by comparing the operating temperature of the magnetic pump 202 and the operating current of the motor 203 with the first threshold and the second threshold associated with the model of the motor-magnetic pump, respectively.

[0049] exist Figure 2 The system 200 shown may also include a display 214 for displaying the test results of the solenoid valve 208 and the magnetic pump 202. In one embodiment, the display 214 may be, for example, a liquid crystal display. For example, information such as "pass" or "failure" may be displayed on the liquid crystal display 214 to indicate whether the solenoid valve 208 and the magnetic pump 202 after repair can be put back into use, but the present disclosure is not limited thereto.

[0050] Figure 3 The use of the embodiment according to the present disclosure is shown Figure 2 The flowchart of the method 300 for testing the solenoid valve 208 and the magnetic pump 202 by the system 200 shown in FIG. Figure 4-5 To describe the method 300. In which, Figure 4 A flow chart of evaluating the performance of a motor-magnetic pump by determining a load current ratio LCR of the motor-magnetic pump according to an embodiment of the present disclosure is shown, and Figure 5 FIG. 1 is a flow chart showing a method for evaluating the performance of a solenoid valve by obtaining the outlet fluid flow rate of the solenoid valve according to an embodiment of the present disclosure. It should be understood that Figure 3-5 The operations of the methods shown in are not exclusive, and other operations may be performed before, after, or between any of the operations shown.

[0051] like Figure 3As shown in , method 300 starts with operation 310, where the performance of the motor-magnetic pump is evaluated by determining the load current ratio LCR of the motor-magnetic pump. It should be noted that before starting operation 310, it is necessary to power the motor 203 so that the magnetic pump 202 can provide the kinetic energy required for the flow of the heat transfer medium. In addition, the outlet fluid pressure P of the magnetic pump 202 is adjusted by the pressure regulator 207 to stabilize it at, for example, 0.3MPa. For example, when the outlet fluid pressure P of the magnetic pump 202 is less than this pressure value, the control unit 213 can properly close the valve of the regulator 207, so that the outlet fluid pressure P of the magnetic pump 202 increases. On the contrary, when the outlet fluid pressure P of the magnetic pump 202 is greater than this pressure value, the control unit 213 can properly open the valve of the regulator 207, so that the outlet fluid pressure P of the magnetic pump 202 decreases.

[0052] As an example, the following will refer to Figure 4 Operation 310 is described below. Figure 4 As shown in FIG. 3 , operation 310 begins at step 410 , where the load current ratio LCR of the motor-magnetic pump is calculated by the following equation (1):

[0053]

[0054] Among them, I is the utilization Figure 2 The system 200 shown in the figure is the working current of the motor 203 measured by the current sensor 212 when testing the motor-magnetic pump (expressed in amperes); P is the load pressure of the motor-magnetic pump during the test, that is, the outlet fluid pressure P of the magnetic pump 202 measured by the pressure sensor 205 (expressed in MPa); and I const is the average working current of the motor 203 when the motor-magnetic pump is unloaded (expressed in amperes), that is, the average working current of the motor 203 obtained by measuring the working current of the motor 203 multiple times when the outlet fluid pressure P of the magnetic pump 202 measured by the pressure sensor 205 is zero. For example, when the motor model is MICROPUMP DC306A, I const It is 1.129Amp.

[0055] Next, operation 310 proceeds to step 420, where it is determined whether the load current ratio LCR obtained by equation (1) is within a predetermined range. Figure 4As shown in , if the load current ratio LCR of the motor-magnetic pump is within the predetermined range, the operation 310 proceeds to step 430, where information such as "pass" can be displayed by the display unit 214 to indicate that the motor-magnetic pump can work normally. If the load current ratio LCR of the motor-magnetic pump is not within the predetermined range, the operation 310 proceeds to step 440, where information such as "fault" can be displayed by the display unit 214 to indicate that the motor-magnetic pump cannot work normally.

[0056] According to an embodiment of the present disclosure, the predetermined range is associated with the model of the motor-magnetic pump. For example, in some embodiments, when the motor model is MICROPUMP DC306A and the magnetic pump model is MICROPUMP GJ-N25.PF1S.A-P4, if the load current ratio LCR of the motor-magnetic pump is within the range of 4±10%, that is, if the load current ratio LCR of the motor-magnetic pump is within the range of [3.6, 4.4], the motor-magnetic pump can work normally; if the load current ratio LCR of the motor-magnetic pump is not within the range of [3.6, 4.4], the motor-magnetic pump cannot work normally.

[0057] Next, the method 300 proceeds to operation 320 where the performance of the solenoid valve is evaluated by acquiring the outlet fluid flow rate of the solenoid valve.

[0058] As an example, the following will refer to Figure 5 Operation 320 is described below. Figure 5 As shown in , operation 320 begins at step 510, where the solenoid valve is heated to a first temperature by a heater to simulate the working environment temperature of the solenoid valve. Figure 2 In the system 200 shown, the motor 203 is powered so that the magnetic pump 202 can provide the kinetic energy required for the flow of the heat transfer medium, and the outlet fluid pressure P of the magnetic pump 202 is monitored to be maintained at, for example, 0.3 MPa. In addition, the control unit 213 can stabilize the temperature of the solenoid valve 208 within a predetermined range, for example, within a range of 80°C±2°C by adjusting the operating current and heating time of the heater 209.

[0059] Next, operation 320 proceeds to step 520, where the outlet fluid flow rate of the solenoid valve is measured for a first time. In one embodiment, when the temperature of the solenoid valve 208 is stable within the range of 80°C ± 2°C, the flow sensor 211 measures the outlet fluid flow rate Q of the solenoid valve 208 for, for example, 30 minutes.

[0060] Next, operation 320 proceeds to step 530, where it is determined whether the outlet fluid flow rate of the solenoid valve is greater than or equal to a threshold value associated with the solenoid valve model. Figure 5 As shown in , if the outlet fluid flow rate of the solenoid valve is greater than or equal to the threshold value, the operation 320 proceeds to step 540, where the display unit 214 may display information such as "pass" to indicate that the solenoid valve 208 can work normally. If the outlet fluid flow rate of the solenoid valve is less than the threshold value, the operation 320 proceeds to step 550, where the display unit 214 may display information such as "fault" to indicate that the solenoid valve 208 cannot work normally.

[0061] According to an embodiment of the present disclosure, the threshold value is associated with the model of the solenoid valve 208. For example, in some embodiments, when the model of the solenoid valve 208 is U8256A013V 24 / DC ASCO, the threshold value is 0.5 L / min. In this case, if the outlet fluid flow rate of the solenoid valve measured within 30 minutes is greater than or equal to 0.5 L / min, the solenoid valve 208 can work normally; if the instantaneous outlet fluid flow rate of the solenoid valve measured at a certain moment within 30 minutes is less than 0.5 L / min, the solenoid valve 208 cannot work normally.

[0062] According to an embodiment of the present disclosure, the stability of the motor-magnetic pump can also be evaluated by comparing the operating temperature of the magnetic pump 202 measured by the temperature sensor 204 and the operating current of the motor 203 measured by the current sensor 213 with the first threshold and the second threshold associated with the model of the motor-magnetic pump. For example, in some embodiments, when the motor model is MICROPUMP DC306A and the magnetic pump model is MICROPUMP GJ-N25.PF1S.A-P4, the first threshold and the second threshold are 60°C and 2.6Amp, respectively. In this case, the operating temperature of the magnetic pump 202 measured at a test time of 30 minutes and the outlet fluid pressure of the magnetic pump 202 is 0.3MPa and the operating current of the motor 203 measured are compared with 60°C and 2.6Amp, respectively. If the operating temperature of the magnetic pump 202 is less than 60°C and the operating current of the motor 203 is less than 2.6Amp, it means that the stability of the motor-magnetic pump is good. On the contrary, if the operating temperature of the magnetic pump 202 is greater than 60° C., or the operating current of the motor 203 is greater than 2.6Amp, it means that the stability of the motor-magnetic pump is not good.

[0063] According to an embodiment of the present disclosure, using Figure 2The system 200 shown can test the performance of the motor-magnetic pump and the performance of the solenoid valve at the same time. Obviously, it is also possible to test the performance of the motor-magnetic pump only, and then only the solenoid valve 208, the heater 209, the temperature sensor 210 and the flow sensor 211 need to be "bypassed".

[0064] According to the embodiments of the present disclosure, the performance of the motor-magnetic pump only needs to be evaluated by determining the load current ratio of the motor-magnetic pump, and the performance of the solenoid valve only needs to be evaluated by obtaining the outlet fluid flow rate of the solenoid valve under the simulated ambient temperature. Therefore, the system and method according to the embodiments of the present disclosure can quickly and accurately evaluate the performance of the solenoid valve and the magnetic pump to ensure that they can work continuously and effectively, improve production efficiency and reduce costs.

[0065] The control unit according to the embodiment of the present disclosure can use electronic hardware, computer software or its arbitrary combination to implement.Whether the control unit is implemented as hardware or software will depend on specific application.As an example, the control unit according to the embodiment of the present disclosure can be implemented as a microprocessor, a microcontroller, a digital signal processor (DSP), a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gate logic, a discrete hardware circuit and other suitable processing components configured for performing the various functions described in the present disclosure.The control unit according to the embodiment of the present disclosure can also be implemented as the software performed by a microprocessor, a microcontroller, a DSP or other suitable platforms.

[0066] According to one embodiment, a computer-readable storage medium is provided, on which a program code is stored. When the program code is executed by a processor, the processor is enabled to perform the Figure 3-5 Specifically, a system or device equipped with a readable storage medium may be provided, on which a software program code for implementing the functions of any of the above-mentioned embodiments is stored, and a computer or processor of the system or device reads and executes the instructions stored in the readable storage medium.

[0067] The above description of the present disclosure is provided to enable any person of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A system for testing a solenoid valve and a magnetic pump, comprising: A storage tank, the storage tank is used to store a heat transfer fluid, the heat transfer fluid flows through the magnetic pump in a fluid main circuit for testing the motor-magnetic pump and a fluid branch circuit for testing the solenoid valve, the magnetic pump is driven by the motor; A pressure sensor, the pressure sensor is used to measure the outlet fluid pressure of the magnetic pump; a first flow sensor, the first flow sensor being used to measure the outlet fluid flow of the magnetic pump; A pressure regulator, the pressure regulator is used to adjust the outlet fluid pressure of the magnetic pump; A current sensor, wherein the current sensor is used to measure the working current of the motor; A heater, wherein the heater is used to heat the solenoid valve; a second flow sensor, the second flow sensor being used to measure the outlet fluid flow of the solenoid valve; as well as a control unit for controlling the operation of the motor, the current sensor, the pressure sensor, the first flow sensor, the pressure regulator, the solenoid valve, the second flow sensor, and the heater, The storage tank, the magnetic pump, the pressure sensor, the first flow sensor, and the pressure regulator are connected by a conduit to form the fluid main circuit, and the solenoid valve and the second flow sensor are located in the fluid branch circuit; and The control unit is configured to evaluate the performance of the motor-magnetic pump by determining a load current ratio LCR of the motor-magnetic pump, and to evaluate the performance of the solenoid valve by obtaining an outlet fluid flow rate of the solenoid valve. 2 . The system of claim 1 , further comprising a first temperature sensor for measuring a temperature of the magnetic pump and a second temperature sensor for measuring a temperature of the solenoid valve.

3. The system according to claim 2, wherein: The control unit is also configured to evaluate the stability of the motor-magnetic pump by comparing the temperature of the magnetic pump and the operating current of the motor with a first threshold and a second threshold, respectively, wherein the first threshold and the second threshold are associated with a model of the motor-magnetic pump.

4. The system according to claim 1, wherein: The load current ratio LCR is calculated by the following equation: Wherein, I is the working current of the motor, P is the load pressure of the motor-magnetic pump, and I const It is the average working current of the motor when the motor-magnetic pump is unloaded.

5. The system according to claim 4, wherein: If the load current ratio LCR is within a predetermined range, the control unit determines that the motor-magnetic pump can work normally; and if the load current ratio LCR is not within the predetermined range, the control unit determines that the motor-magnetic pump cannot work normally, and the predetermined range is associated with the model of the motor-magnetic pump.

6. The system according to claim 1, wherein: Evaluating the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve includes: heating the solenoid valve to a first temperature by the heater; measuring the outlet fluid flow rate of the solenoid valve at the first temperature for a first time; and The outlet fluid flow rate of the solenoid valve is compared to a third threshold value to evaluate the performance of the solenoid valve, the third threshold value being associated with the solenoid valve model.

7. The system according to claim 6, wherein: If the outlet fluid flow rate of the solenoid valve is greater than or equal to the third threshold, the control unit determines that the solenoid valve can work normally; and if the outlet fluid flow rate of the solenoid valve is less than the third threshold, the control unit determines that the solenoid valve cannot work normally.

8. The system according to claim 1, further comprising a display for displaying test results of the solenoid valve and the magnetic pump.

9. A method for testing a solenoid valve and a magnetic pump, wherein a heat transfer fluid flows through the magnetic pump in a fluid main circuit for testing a motor-magnetic pump and a fluid branch circuit for testing the solenoid valve, the magnetic pump is driven by the motor, a storage tank for storing the heat transfer fluid, the magnetic pump, a pressure sensor for measuring the outlet fluid pressure of the magnetic pump, a first flow sensor for measuring the outlet fluid flow of the magnetic pump, and a pressure regulator for regulating the outlet fluid pressure of the magnetic pump are connected through a conduit to form the fluid main circuit, the solenoid valve and a second flow sensor for measuring the outlet fluid flow of the solenoid valve are located in the fluid branch circuit, the method comprising: evaluating the performance of the motor-magnetic pump by determining the load current ratio LCR of the motor-magnetic pump; as well as The performance of the solenoid valve is evaluated by obtaining the outlet fluid flow rate of the solenoid valve.

10. The method according to claim 9, further comprising: The stability of the motor-magnetic pump is evaluated by comparing the temperature of the magnetic pump and the operating current of the motor with a first threshold and a second threshold, respectively, wherein the first threshold and the second threshold are associated with the model of the motor-magnetic pump.

11. The method according to claim 9, wherein: The load current ratio LCR is calculated by the following equation: Wherein, I is the working current of the motor, P is the load pressure of the motor-magnetic pump, and I const It is the average working current of the motor when the motor-magnetic pump is unloaded.

12. The method according to claim 11, wherein: Evaluation of the performance of the motor-magnetic pump includes: If the load current ratio LCR is within a predetermined range, it is determined that the motor-magnetic pump can operate normally; and If the load current ratio LCR is not within the predetermined range, it is determined that the motor-magnetic pump cannot operate normally, and the predetermined range is associated with the model of the motor-magnetic pump.

13. The method according to claim 9, wherein: Evaluating the performance of the solenoid valve by obtaining the outlet fluid flow of the solenoid valve includes: heating the solenoid valve to a first temperature by a heater; measuring the outlet fluid flow rate of the solenoid valve at the first temperature for a first time; and The outlet fluid flow rate of the solenoid valve is compared to a third threshold value to evaluate the performance of the solenoid valve, the third threshold value being associated with the solenoid valve model.

14. The method according to claim 13, wherein: Evaluation of the performance of the solenoid valve includes: If the outlet fluid flow rate of the solenoid valve is greater than or equal to the third threshold, it is determined that the solenoid valve can work normally; and If the outlet fluid flow rate of the solenoid valve is less than the third threshold, it is determined that the solenoid valve cannot operate normally.

15. A computer readable medium storing a computer program comprising instructions which, when executed by a control unit, cause the control unit to be configured to perform the method according to any one of claims 9-14.

16. A computer program product for testing a solenoid valve and a magnetic pump, comprising a computer program code executable by a processor, the computer program code being used to execute the method according to any one of claims 9 to 14.

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