Compressor performance test system and test method thereof

Abstract

The application provides a compressor performance test system and a test method thereof, wherein the compressor performance test system comprises a to-be-tested compressor, at least two condensers, at least two calorimeters and a control unit, a temperature sensor, a pressure sensor and an electronic expansion valve are arranged between the inlet of the calorimeter and the outlet of the condenser, and the outlet of the calorimeter and the liquid reservoir are spaced apart to arrange the pressure sensor and the temperature sensor. In the compressor performance test system and the test method thereof provided in the application, two or more sets of calorimeter systems are used to simultaneously obtain refrigerating capacity of two or more evaporation sides and heating capacity of two or more condensation sides, so as to meet the performance test requirements of the compressor with multiple evaporation temperatures and multiple condensation temperatures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a compressor performance testing system and a testing method thereof. BACKGROUND

[0002] With the large use of small refrigeration devices such as refrigerators, freezers and air conditioners in ordinary families, the electricity consumption of residents also increases accordingly, and users have higher requirements for the energy-saving effect of products. The service life and energy saving and environmental protection of these products depend on the working state and performance of the compressor. The compressor has a direct impact on the refrigeration and heating effect, energy-saving effect, service life and noise of the refrigeration device. Therefore, refrigeration equipment manufacturers have higher requirements for accurately testing the thermodynamic parameters, noise and vibration of the compressor, and the performance requirements for the compressor are becoming higher and higher, and the testing of the compressor is also becoming more and more important.

[0003] However, the existing compressor performance testing device generally only has a set of calorimeter side system, a set of condensing system and a compressor suction state control unit, and can only test the refrigerating capacity of the compressor with one suction pressure and one discharge pressure. It cannot simultaneously detect the performance of the compressor with multiple evaporation temperatures and multiple condensing temperatures, and cannot meet the performance testing requirements of the compressor with multiple evaporation temperatures and multiple condensing temperatures. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide a compressor performance testing system and a testing method thereof, which overcomes the difficulties of the prior art and can independently adjust two or more condensing temperatures, simultaneously obtain the refrigerating capacity of two or more evaporation sides and the heating capacity of two or more condensing sides, and meet the performance testing requirements of the compressor with multiple evaporation temperatures and multiple condensing temperatures.

[0005] According to one aspect of the present application, a compressor performance testing system is provided, which comprises:

[0006] a to-be-tested compressor, a first condenser, a second condenser, a first calorimeter, a second calorimeter, a control unit and a sensing unit;

[0007] The inlet of the first condenser is connected with the first discharge port of the to-be-tested compressor, the outlet of the first condenser is connected with the inlet of the first calorimeter, and the outlet of the first calorimeter is connected with the first liquid reservoir of the to-be-tested compressor;

[0008] The inlet of the second condenser is connected with the second discharge port of the to-be-tested compressor, the outlet of the second condenser is connected with the inlet of the second calorimeter, and the outlet of the second calorimeter is connected with the second liquid reservoir of the to-be-tested compressor;

[0009] The control unit comprises a first electronic expansion valve, a second electronic expansion valve, a first stop valve to a fourth stop valve, the first electronic expansion valve is arranged between the outlet of the first condenser and the inlet of the first calorimeter, the second electronic expansion valve is arranged between the outlet of the second condenser and the inlet of the second calorimeter, the first stop valve is arranged between the inlet of the first condenser and the first exhaust port, the second stop valve is arranged between the outlet of the first calorimeter and the first liquid reservoir, the third stop valve is arranged between the inlet of the second condenser and the second exhaust port, and the fourth stop valve is arranged between the outlet of the second calorimeter and the second liquid reservoir.

[0010] The sensing unit is arranged at the inlet and outlet of the first condenser, the second condenser, the first calorimeter and the second calorimeter for sensing the pressure and temperature at the inlet and outlet of the first condenser, the second condenser, the first calorimeter and the second calorimeter.

[0011] Optionally, in the compressor performance test system, the sensing unit comprises: the first pressure sensor is arranged between the first stop valve and the first exhaust port, the second pressure sensor is arranged between the first electronic expansion valve and the outlet of the first condenser, the first temperature sensor is arranged between the second pressure sensor and the outlet of the first condenser, and the third pressure sensor, the second temperature sensor, the fourth pressure sensor and the third temperature sensor are arranged in sequence between the outlet of the first calorimeter and the first electronic expansion valve.

[0012] Optionally, in the compressor performance test system, the sensing unit further comprises: a fifth pressure sensor to an eighth pressure sensor, a fourth temperature sensor to a sixth temperature sensor;

[0013] The fifth pressure sensor is arranged between the second stop valve and the second exhaust port, the sixth pressure sensor is arranged between the second electronic expansion valve and the outlet of the second condenser, the fourth temperature sensor is arranged between the sixth pressure sensor and the outlet of the second condenser, and the seventh pressure sensor, the fifth temperature sensor, the eighth pressure sensor and the sixth temperature sensor are arranged in sequence between the outlet of the second calorimeter and the second electronic expansion valve.

[0014] Optionally, in the compressor performance test system, the control unit further comprises: a fifth stop valve and a sixth stop valve;

[0015] The fifth stop valve is arranged between the outlet of the first condenser and the inlet of the second calorimeter, and the sixth stop valve is arranged between the outlet of the second condenser and the inlet of the second calorimeter.

[0016] Optionally, in the compressor performance test system, the compressor to be tested is a double-cylinder double-accumulator compressor, the compressor to be tested comprises a compressor body and a first accumulator and a second accumulator connected with the compressor body, the first accumulator is communicated with a first cylinder in the compressor body, and the second accumulator is communicated with a second cylinder in the compressor body.

[0017] Optionally, in the compressor performance test system, the compressor to be tested is a multi-cylinder multi-accumulator compressor, each accumulator is communicated with a corresponding cylinder in the compressor body, the compressor to be tested has a plurality of exhaust ports, each exhaust port is connected with a corresponding condenser, the plurality of condensers correspond to the plurality of accumulators one by one, and a calorimeter system is arranged between each condenser and the corresponding accumulator.

[0018] The calorimeter system comprises a calorimeter, an inlet of the calorimeter is connected with an outlet of the condenser, an outlet of the calorimeter is connected with the accumulator, an electronic expansion valve is arranged between the outlet of the condenser and the inlet of the calorimeter, and a stop valve is arranged between the outlet of the calorimeter and the accumulator.

[0019] According to another aspect of the present application, a compressor performance test method is provided, the compressor performance test method comprises:

[0020] providing the compressor performance test system as described above;

[0021] when the compressor to be tested is a compressor with double evaporation temperatures and double condensation temperatures, the fifth stop valve is closed, and the first stop valve to the fourth stop valve and the sixth stop valve are opened;

[0022] when the compressor to be tested is a compressor with single evaporation temperature and single condensation temperature, the third stop valve to the sixth stop valve are closed, and the first stop valve and the second stop valve are opened; or the first stop valve, the second stop valve and the fifth stop valve are closed, and the third stop valve, the fourth stop valve and the sixth stop valve are opened.

[0023] Optionally, in the compressor performance test method, when the compressor to be tested is a compressor with double evaporation temperatures and single condensation temperature, the third stop valve and the sixth stop valve are closed, and the first stop valve, the second stop valve, the fourth stop valve and the fifth stop valve are opened.

[0024] Optionally, in the compressor performance test method, when the compressor to be tested is a compressor with single evaporation temperature and double condensation temperature, the first electronic expansion valve and the fourth stop valve are closed, and the first stop valve to the third stop valve, the fifth stop valve and the sixth stop valve are opened.

[0025] Optionally, in the compressor performance test method, the refrigerating capacity of the evaporation side of the compressor under test is measured by a second refrigerant calorimeter method or a full-liquid calorimeter method.

[0026] In the compressor performance test system and the test method thereof, two or more calorimeter systems are used to simultaneously obtain the refrigerating capacity of two or more evaporation sides and the heating capacity of two or more condensation sides, thereby meeting the performance test requirements of the compressor with multiple evaporation temperatures and multiple condensation temperatures. BRIEF DESCRIPTION OF DRAWINGS

[0027] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the characteristics and advantages of the present application are more obvious.

[0028] Figure 1 Fig. 1 is a structural schematic diagram of a compressor performance test system according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below. Although the present application will be described and illustrated by means of some specific embodiments, it is to be noted that the present application is not only limited to these embodiments. Instead, modifications or equivalent replacements to the present application should be included in the scope of the claims of the present application.

[0030] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. Those skilled in the art will understand that the present application can also be implemented without these specific details. In some other examples, well-known structures and components are not described in detail in order to highlight the main idea of the present application.

[0031] The technical solutions of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the characteristics and advantages of the present application are more obvious.

[0032] Reference should be made to Figure 1 Fig. 1 is a structural schematic diagram of a compressor performance test system according to an embodiment of the present application. Figure 1As shown, the compressor performance test system 100 comprises: a compressor to be tested, a first condenser 21, a second condenser 22, a first calorimeter 31, a second calorimeter 32, a control unit and a sensing unit; the inlet of the first condenser 21 is connected with the first exhaust port 11a of the compressor to be tested, the outlet of the first condenser 21 is connected with the inlet of the first calorimeter 31, the outlet of the first calorimeter 21 is connected with the first liquid reservoir 12 of the compressor to be tested, the inlet of the second condenser 22 is connected with the second exhaust port 11b of the compressor to be tested, the outlet of the second condenser 22 is connected with the inlet of the second calorimeter 32, the outlet of the second calorimeter 32 is connected with the second liquid reservoir 13 of the compressor to be tested; the control unit comprises a first electronic expansion valve K1, a second electronic expansion valve K2 and first to fourth stop valves V1-V4, the first electronic expansion valve K1 is arranged between the outlet of the first condenser 21 and the inlet of the first calorimeter 31, the second electronic expansion valve K2 is arranged between the outlet of the second condenser 22 and the inlet of the second calorimeter 32, the first stop valve V1 is arranged between the inlet of the first condenser 21 and the first exhaust port 11a, the second stop valve V2 is arranged between the outlet of the first calorimeter 31 and the first liquid reservoir 12, the third stop valve V3 is arranged between the inlet of the second condenser 22 and the second exhaust port 11b, and the fourth stop valve V4 is arranged between the outlet of the second calorimeter 32 and the second liquid reservoir 13; the sensing unit is arranged at the inlets and outlets of the first condenser 21, the second condenser 22, the first calorimeter 31 and the second calorimeter 32 for sensing the pressure and temperature at the inlets and outlets of the first condenser 21, the second condenser 22, the first calorimeter 31 and the second calorimeter 32.

[0033] Specifically, the control unit comprises a first electronic expansion valve K1, a second electronic expansion valve K2 and first to fourth stop valves V1-V4. Among them, the first electronic expansion valve K1, the first stop valve V1 and the second stop valve V2 are arranged on the first refrigerant pipeline, and the first refrigerant pipeline extends from the first exhaust port 11a to the air inlet of the first liquid reservoir 12. The second electronic expansion valve K2, the third stop valve V3 and the fourth stop valve V4 are arranged on the second refrigerant pipeline, and the second refrigerant pipeline extends from the second exhaust port 11b to the air inlet of the second liquid reservoir 13.

[0034] Please continue to refer to Figure 1The sensing unit comprises: first to fourth pressure sensors P1 to P4, first to third temperature sensors T1 to T3; the first pressure sensor P1 is arranged between the first stop valve V1 and the first exhaust port 11a, the second pressure sensor P2 is arranged between the first electronic expansion valve K1 and the outlet of the first condenser 21, the first temperature sensor T1 is arranged between the second pressure sensor P2 and the outlet of the first condenser 21, the third pressure sensor P3, the second temperature sensor T2, the third temperature sensor T3 and the fourth pressure sensor P4 are sequentially arranged between the outlet of the first calorimeter 31 and the first electronic expansion valve K1.

[0035] Please continue to refer to Figure 1 The sensing unit further comprises: fifth to eighth pressure sensors P5 to P8, fourth to sixth temperature sensors T4 to T6; the fifth pressure sensor P5 is arranged between the second stop valve V2 and the second exhaust port 11b, the sixth pressure sensor P6 is arranged between the second electronic expansion valve K2 and the outlet of the second condenser 22, the fourth temperature sensor T4 is arranged between the sixth pressure sensor P6 and the outlet of the second condenser 22, the seventh pressure sensor P7, the fifth temperature sensor T5, the sixth temperature sensor T6 and the eighth pressure sensor P8 are sequentially arranged between the outlet of the second calorimeter 32 and the second electronic expansion valve K2.

[0036] In the embodiment, the compressor to be tested is a double-cylinder double-accumulator compressor, the compressor to be tested adopts two sets of suction state control systems, and the condensing side of the compressor to be tested adopts two sets of independently adjusted control systems.

[0037] As shown in Figure 1 The compressor to be tested comprises a compressor body 11 and first and second accumulators 12 and 13 connected with the compressor body 11, the compressor body 11 is respectively provided with first and second exhaust ports 11a and 11b, the first accumulator 12 communicates with a first cylinder (not shown in the figure) in the compressor body 11, and the second accumulator 13 communicates with a second cylinder (not shown in the figure) in the compressor body 11.

[0038] In the embodiment, the first cylinder and the second cylinder are connected in parallel and can independently realize compression work, and the displacement of the first cylinder and the second cylinder can be the same or different.

[0039] When testing, the compressor to be tested is placed in a test chamber and can be replaced and disassembled, and other components are fixed and cannot be disassembled.

[0040] During the test, the refrigerant discharged by the compressor is divided into two paths. One path (i.e., a first refrigerant circuit) enters the first condenser 21 through the first stop valve V1, throttles through the first electronic expansion valve K1, and enters the first calorimeter 31. In the first calorimeter 31, the refrigerant absorbs heat and evaporates at the evaporation temperature T1, and the refrigeration capacity generated by the evaporation is balanced with the heating capacity of the heater in the first calorimeter 31. The refrigerant from the first calorimeter 31 enters the first accumulator 12 of the compressor through the second stop valve V2, thereby entering one of the cylinders of the compressor, being compressed again, and performing a system cycle.

[0041] The other path (i.e., a second refrigerant circuit) enters the second condenser 22 through the third stop valve V3, throttles through the second electronic expansion valve K2, and enters the second calorimeter 32. In the second calorimeter 32, the refrigerant absorbs heat and evaporates at the evaporation temperature T2, and the refrigeration capacity generated by the evaporation is balanced with the heating capacity of the heater in the second calorimeter 32. The refrigerant from the second calorimeter 32 enters the second accumulator 13 of the compressor through the fourth stop valve V4, thereby entering the other cylinder of the compressor, being compressed again, and performing a system cycle.

[0042] The evaporation temperature T1 is achieved by controlling the saturation pressure P1 corresponding to the evaporation temperature T1 of the first calorimeter 31, and the evaporation temperature T2 is achieved by controlling the saturation pressure P2 corresponding to the evaporation temperature T2 of the second calorimeter 32. The state point of the refrigerant can be determined by the tested temperature and pressure values, and then the thermodynamic properties such as enthalpy and entropy values of the state point can be calculated by using existing property calculation software or correlations, which facilitates the calculation of refrigeration capacity and the calculation of system cycle efficiency.

[0043] The refrigeration capacity on the evaporation side can be obtained according to the refrigeration capacity on the refrigeration side, and the calculation formula is: refrigerant flow rate × (enthalpy value at outlet of refrigerant calorimeter - enthalpy value before expansion valve), which is corrected with the heating capacity of the heater.

[0044] Please continue to refer to Figure 1 The control unit further includes a fifth stop valve V5 and a sixth stop valve V6. The fifth stop valve V5 is arranged between the outlet of the first condenser 21 and the inlet of the second calorimeter 32, and the sixth stop valve V6 is arranged between the outlet of the second condenser 22 and the inlet of the second calorimeter 32.

[0045] The sixth stop valve V6 is used for controlling the opening and closing of the second refrigerant pipeline. The refrigerant from the second condenser 22 must pass through the sixth stop valve V6 to reach the second electronic expansion valve K2. The fifth stop valve V5 is used for controlling the calorimeter system. When the fifth stop valve V5 is closed, the two sets of calorimeter systems are independent of each other. When the fifth stop valve V5 is opened, the two sets of calorimeter systems are connected in parallel.

[0046] Correspondingly, the embodiment also provides a compressor performance test method. Please continue to refer to Figure 1 , the compressor performance test method comprises:

[0047] providing a compressor performance test system 100 as described above;

[0048] When the compressor to be tested is a compressor with double evaporation temperature and double condensation temperature structure, the fifth stop valve V5 is closed, and the first stop valve V1 to the fourth stop valve V4 and the sixth stop valve V6 are opened.

[0049] When the compressor to be tested is a compressor with single evaporation temperature and single condensation temperature structure, the third stop valve V3 to the sixth stop valve V6 are closed, and the first stop valve V1 and the second stop valve V2 are opened; or the first stop valve V1, the second stop valve V2 and the fifth stop valve V5 are closed, and the third stop valve V3, the fourth stop valve V4 and the sixth stop valve V6 are opened.

[0050] Specifically, the compressor performance test system can be suitable for various types of compressors.

[0051] For example, when the compressor to be tested is a compressor with double evaporation temperature and double condensation temperature structure, the fifth stop valve V5 is closed, and the first stop valve V1 to the fourth stop valve V4 and the sixth stop valve V6 are opened. At this time, the compressor performance test system 100 has two independent refrigerant pipelines, and each refrigerant pipeline is provided with an independent calorimeter system. Therefore, the compressor performance test system 100 can simultaneously obtain the refrigeration performance of two condensation sides, and thus obtain the refrigeration performance of two evaporation sides.

[0052] When the compressor to be tested is a compressor with single evaporation temperature and single condensation temperature structure, the third stop valve V3 to the sixth stop valve V6 can be closed, and the first stop valve V1 and the second stop valve V2 can be opened. At this time, the compressor performance test system 100 has only one refrigerant pipeline (i.e. the first refrigerant pipeline), and the first refrigerant pipeline is provided with an independent calorimeter system. Therefore, the compressor performance test system 100 is similar to a conventional compressor performance test device, and can only test the compressor performance of a refrigeration system with single evaporation temperature and single condensation temperature.

[0053] Alternatively, the first stop valve V1, the second stop valve V2 and the fifth stop valve V5 are closed, and the third stop valve V3, the fourth stop valve V4 and the sixth stop valve V6 are opened. At this time, the compressor performance test system 100 has only one refrigerant pipeline (i.e. the second refrigerant pipeline) on which an independent calorimeter system is arranged. Similarly, the compressor performance test system 100 is similar to a conventional compressor performance test device, and can only test the compressor performance of a refrigeration system with a single evaporation temperature and a single condensation temperature.

[0054] When the compressor to be tested is a compressor with a double evaporation temperature and a single condensation temperature structure, the third stop valve V3 and the sixth stop valve V6 are closed, and the first stop valve V1, the second stop valve V2, the fourth stop valve V4 and the fifth stop valve V5 are opened. At this time, the second refrigerant pipeline in the compressor performance test system 100 is disconnected, and the refrigerant cannot pass through the third stop valve V3 to reach the second condenser 22, and the refrigerant from the first condenser 21 is divided into two paths and enters two calorimeters (i.e. the first calorimeter 31 and the second calorimeter 32). Therefore, the compressor performance test system 100 can test the compressor performance of a refrigeration system with a double evaporation temperature and a single condensation temperature.

[0055] When the compressor to be tested is a compressor with a single evaporation temperature and a double condensation temperature structure, the first electronic expansion valve K1 and the fourth stop valve V4 are closed, and the first stop valve V1 to the third stop valve V3, the fifth stop valve V5 and the sixth stop valve V6 are opened. At this time, the refrigerant in the compressor performance test system 100 cannot enter the first calorimeter 31 via the first electronic expansion valve K1, and the refrigerant cannot enter the second accumulator 13 via V4. Therefore, the compressor performance test system 100 can test the compressor performance of a refrigeration system with a single evaporation temperature and a double condensation temperature.

[0056] In this embodiment, the refrigerating capacity of the evaporation side of the compressor to be tested is measured by the second refrigerant calorimeter method or the flooded calorimeter method.

[0057] In this embodiment, the compressor to be tested is a compressor with two cylinders and two accumulators, and the compressor performance test method can be used to simultaneously obtain the heating capacity of the two condensation sides and the refrigerating capacity of the two evaporation sides, i.e. to test the compressor performance of a refrigeration system with a single compressor, a double evaporation temperature and a double condensation temperature.

[0058] In other embodiments of the present application, the compressor to be tested can also be a multi-cylinder multi-accumulator compressor, each accumulator being in communication with a corresponding cylinder in the compressor body and capable of independently implementing the compression process. The compressor to be tested has multiple discharge ports, each discharge port being connected to a corresponding condenser, the multiple condensers corresponding to the multiple accumulators one-to-one, and each condenser being provided with a calorimeter system between the corresponding accumulator. That is, the compressor performance test system provided in other embodiments has multiple refrigerant pipelines, each refrigerant pipeline being provided with a set of calorimeter systems, and the multiple sets of calorimeter systems can be independently or in parallel.

[0059] The calorimeter system comprises a calorimeter, the inlet of the calorimeter being connected to the outlet of the condenser, the outlet of the calorimeter being connected to the accumulator, an electronic expansion valve being provided between the outlet of the condenser and the inlet of the calorimeter, and a stop valve being provided between the outlet of the calorimeter and the accumulator. Another stop valve is provided between the inlet of the condenser and the discharge port of the compressor body.

[0060] Correspondingly, in other embodiments of the present application, the compressor to be tested adopts multiple sets of suction state control systems, and the condensing side of the compressor to be tested adopts multiple sets of independently adjusted control systems.

[0061] When the compressor to be tested is a compressor with multiple evaporation temperatures and multiple condensing temperatures, the compressor performance test system 100 has multiple independent refrigerant pipelines by controlling the stop valves, and each refrigerant pipeline is provided with an independent calorimeter system. Therefore, the compressor performance test method provided in this embodiment can simultaneously obtain the heating capacity of multiple condensing sides and the refrigerating capacity of multiple evaporation sides, that is, the compressor performance of a single compressor with multiple evaporation temperatures and multiple condensing temperatures can be tested.

[0062] In summary, the compressor performance test system and the test method thereof of the present application simultaneously obtain the refrigerating capacity of two or more evaporation sides and the heating capacity of two or more condensing sides by using two or more sets of calorimeter systems, thereby meeting the performance test requirements of a compressor with multiple evaporation temperatures and multiple condensing temperatures.

[0063] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, some simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A compressor performance testing system, characterized in that, include: The compressor under test includes a first condenser, a second condenser, a first calorimeter, a second calorimeter, a control unit, and a sensing unit. The inlet of the first condenser is connected to the first exhaust port of the compressor under test, the outlet of the first condenser is connected to the inlet of the first calorimeter, and the outlet of the first calorimeter is connected to the first liquid receiver of the compressor under test. The inlet of the second condenser is connected to the second exhaust port of the compressor under test, the outlet of the second condenser is connected to the inlet of the second calorimeter, and the outlet of the second calorimeter is connected to the second liquid receiver of the compressor under test. The control unit includes a first electronic expansion valve, a second electronic expansion valve, and a first to a fourth shut-off valve. The first electronic expansion valve is located between the outlet of the first condenser and the inlet of the first calorimeter. The second electronic expansion valve is located between the outlet of the second condenser and the inlet of the second calorimeter. The first shut-off valve is located between the inlet of the first condenser and the first exhaust port. The second shut-off valve is located between the outlet of the first calorimeter and the first liquid receiver. The third shut-off valve is located between the inlet of the second condenser and the second exhaust port. The fourth shut-off valve is located between the outlet of the second calorimeter and the second liquid receiver. The control unit also includes a fifth shut-off valve and a sixth shut-off valve. The fifth shut-off valve is located between the outlet of the first condenser and the inlet of the second calorimeter, and the sixth shut-off valve is located between the outlet of the second condenser and the inlet of the second calorimeter. The sensing unit is disposed at the inlet and outlet of the first condenser, the second condenser, the first calorimeter, and the second calorimeter, and is used to sense the pressure and temperature at the inlet and outlet of the first condenser, the second condenser, the first calorimeter, and the second calorimeter. The sensing unit includes: a first pressure sensor to a fourth pressure sensor, and a first temperature sensor to a third temperature sensor; the first pressure sensor is disposed between the first shut-off valve and the first exhaust port, the second pressure sensor is disposed between the first electronic expansion valve and the outlet of the first condenser, the first temperature sensor is disposed between the second pressure sensor and the outlet of the first condenser, and the third pressure sensor, the second temperature sensor, the fourth pressure sensor, and the third temperature sensor are sequentially disposed between the outlet of the first calorimeter and the second shut-off valve.

2. The compressor performance testing system as described in claim 1, characterized in that, The sensing unit further includes: a fifth pressure sensor to an eighth pressure sensor, and a fourth temperature sensor to a sixth temperature sensor; The fifth pressure sensor is disposed between the third shut-off valve and the second exhaust port, the sixth pressure sensor is disposed between the second electronic expansion valve and the outlet of the second condenser, the fourth temperature sensor is disposed between the sixth pressure sensor and the outlet of the second condenser, and the seventh pressure sensor, the fifth temperature sensor, the eighth pressure sensor and the sixth temperature sensor are disposed sequentially between the outlet of the second calorimeter and the fourth shut-off valve.

3. The compressor performance testing system as described in claim 1, characterized in that, The compressor under test is a dual-cylinder, dual-reservoir compressor. The compressor under test includes a compressor body and a first reservoir and a second reservoir connected to the compressor body. The first reservoir is connected to the first cylinder in the compressor body, and the second reservoir is connected to the second cylinder in the compressor body.

4. The compressor performance testing system as described in claim 1, characterized in that, The compressor under test is a multi-cylinder, multi-liquid-reservoir compressor. Each liquid-reservoir is connected to the corresponding cylinder in the compressor body. The compressor under test has multiple exhaust ports. Each exhaust port is connected to a corresponding condenser. The multiple condensers correspond one-to-one with the multiple liquid-reservos. A calorimeter system is installed between each condenser and the corresponding liquid-reservoir. The calorimeter system includes a calorimeter, the inlet of which is connected to the outlet of the condenser, the outlet of which is connected to the liquid reservoir, an electronic expansion valve is provided between the outlet of the condenser and the inlet of the calorimeter, and a shut-off valve is provided between the outlet of the calorimeter and the liquid reservoir.

5. A method for testing the performance of a compressor, characterized in that, include: Provide a compressor performance testing system as described in any one of claims 1 to 4; When the compressor under test is a compressor with dual evaporation temperature and dual condensation temperature structure, close the fifth shut-off valve and simultaneously open the first to fourth shut-off valves and the sixth shut-off valve. When the compressor under test is a compressor with a single evaporation temperature and a single condensation temperature structure, close the third to sixth shut-off valves and open the first and second shut-off valves at the same time; or close the first, second, and fifth shut-off valves and open the third, fourth, and sixth shut-off valves at the same time.

6. The compressor performance testing method as described in claim 5, characterized in that, Also includes: When the compressor under test is a compressor with a dual evaporation temperature and a single condensation temperature structure, close the third and sixth shut-off valves, and simultaneously open the first, second, fourth, and fifth shut-off valves.

7. The compressor performance testing method as described in claim 5, characterized in that, The cooling capacity of the evaporator side of the compressor under test is measured using either the second refrigeration calorimeter method or the flooded calorimeter method.

Images