High-precision and high-capacity compressor performance testing device
By designing a compressor performance testing device that includes the compressor quality flowmeter, exhaust regulating valve, liquid circuit regulatory valve, and mixture, the problem of insufficient measurement and high energy consumption in existing technology has been solved. Performance testing of large capacity compressors with accuracy and low energy consumption.
Patent Information
- Application Number
- CN202411829257.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-01-21
AI Technical Summary
The existing compressor performance testing devices are insufficient in measuring the refrigeration capacity, and are complex in equipment and have high energy consumption, especially when testing large-capacity compressors.
Design a high -precision and large capacity compressor performance test device including testing systems and testing equipment. In the testing equipment, the quality flow of the total gas road uses the gas road cooling meter using the gas road, and control the working conditions of the compressor through the exhaust regulating valve, the liquid road regulating valve and the air path regulating valve. Realize the precise measurement of the refrigeration volume of compressed machine.
A high -precision measurement of the refrigeration volume of the compressed machine is achieved, the equipment structure is simplified, the energy consumption is reduced, and the choice of multi -functional test mode is provided to meet the test needs of different operating conditions.
Smart Images
Figure CN119333381A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of compressor performance testing, and in particular relates to a compressor performance testing device that meets the requirements of high precision and large capacity. Background Art
[0002] The compressor is the heart of the refrigeration system. The refrigeration system inputs electrical energy through the compressor, and achieves the process of energy conversion through a series of cycles such as compression, condensation, throttling, and evaporation. The refrigeration performance of the compressor determines the energy efficiency ratio of the entire refrigeration system. Simply put, the higher the cooling capacity of the compressor per unit time and the lower the power consumption, the better the compressor performance.
[0003] At present, conventional compressor performance testing devices generally use the second refrigerant calorimeter method for testing. The second refrigerant calorimeter method uses the second refrigerant as a heat exchange medium, and uses the heat of the electric heater to exchange the cold generated by the refrigeration system. When equilibrium is reached, the cooling capacity is obtained by measuring the heating power. However, this method of measuring cooling capacity has certain disadvantages. For example, heat leakage causes errors in measurement accuracy. At the same time, the equipment is relatively complex. When testing the performance of large-capacity compressors, using this method will increase the overall energy consumption of the equipment.
[0004] The existing compressor performance testing device has certain shortcomings in measurement accuracy when measuring refrigeration capacity. At the same time, there is an urgent need for a simple and convenient measurement device to perform compressor performance testing to ensure that the energy consumption of the equipment is reduced. For this reason, we propose a compressor performance testing device that meets the requirements of high precision and large capacity. Summary of the invention
[0005] The purpose of the present invention is to provide a high-precision and large-capacity compressor performance testing device to solve the problem that the existing compressor performance testing device has certain shortcomings in measurement accuracy when measuring refrigeration capacity. At the same time, there is an urgent need for a simple and convenient measurement device to carry out compressor performance testing to ensure that the energy consumption of the equipment is reduced.
[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a high-precision and high-capacity compressor performance test device, comprising a test system and a test device connected to the test system, wherein the test device comprises a gas path mass flowmeter, the gas path mass flowmeter is connected in series to the compressor air outlet, and the gas path mass flowmeter is connected in series to an exhaust regulating valve, the exhaust regulating valve is connected to a condenser and a gas path regulating valve through a tee, the condenser is connected in series to a liquid reservoir, the other end of the liquid reservoir is connected to a liquid path mass flowmeter, one end of the liquid path mass flowmeter is connected to the liquid path regulating valve and a liquid injection circuit through a tee, one end of the liquid path regulating valve and one end of the gas path regulating valve are connected to a mixer liquid inlet; the compressor air inlet is connected to the mixer and the liquid injection circuit through a tee. The test system includes a control processing module, and a measurement module, a regulation module, a balance calculation module and a liquid testing module which are respectively connected to the control processing module in communication; Control processing module: used to receive commands from other modules of the test system to control the operation of the test equipment, and to obtain the structural data of the test equipment and display it on the system center interface; Measuring module: used to measure the total gas path refrigerant mass flow rate under different working conditions through the gas path mass flow meter, so as to determine the cooling capacity of the compressor. The total gas path refrigerant mass flow rate is proportional to the cooling capacity. The larger the total gas path refrigerant mass flow rate, the larger the cooling capacity. The calculation formula is shown in formula ①: ①; in, is the refrigeration capacity of the compressor, in WkWW; W is the total gas path refrigerant mass flow rate measured by the gas path mass flow meter, in kg / s; is the enthalpy of the refrigerant at the mixer inlet, in J / kg; is the enthalpy of the refrigerant at the outlet of the condenser, in J / kg; Adjustment module: used to control the exhaust regulating valve by using electrical analog quantity to automatically adjust the valve size, thereby controlling the exhaust pressure of the compressor, so as to meet the corresponding working conditions of the compressor, so as to achieve the test requirements of the compressor under different working conditions; It is used to control the suction temperature of the compressor by controlling the liquid circuit regulating valve and automatically adjusting the valve size by using electrical analog quantity, so as to ensure the normal operation of the compressor within the test suction temperature range; within the test suction temperature range, the higher the compressor suction temperature, the smaller the cooling capacity, and vice versa, the lower the compressor suction temperature, the greater the cooling capacity; It is used to control the gas path regulating valve and automatically adjust the valve size by using electrical analog quantity, thereby controlling the suction pressure of the compressor and ensuring the normal operation of the compressor within the test suction pressure range; Balance calculation module: used to test the mass flow rate of liquid refrigerant under different working conditions by controlling the liquid mass flow meter to ensure that the gaseous refrigerant and liquid refrigerant entering the mixer meet the compressor intake requirements under the test conditions; Liquid test module: used to simulate the air conditioning defrost condition and the compressor liquid start-up test by controlling the liquid spray circuit, wherein the liquid spray circuit is provided with a liquid spray flow meter, a pressure gauge and a thermometer. The liquid spray flow meter is used to measure the return liquid flow rate, and the pressure gauge and thermometer are used to measure the liquid refrigerant pressure and temperature of the return liquid.
[0007] Preferably, the control processing module obtains various structural data of the test equipment and displays them on the system center interface, including the following structural data: gas circuit mass flow meter data, exhaust control valve valve opening and real-time exhaust pressure, liquid circuit mass flow meter data, liquid circuit control valve valve opening, gas circuit control valve valve opening and compressor suction temperature and suction pressure.
[0008] Preferably, the test system also includes a preparation module, which is used for pre-test preparations after the compressor is installed on the test equipment, including evacuating the entire test equipment connected to the compressor, checking the sealing of the connection positions between the compressor air inlet and air outlet and the test equipment, and injecting sufficient refrigerant to ensure the normal operation of the compressor. After the pre-test preparations for the compressor are completed, the preparation module sends a preparation completion command to the control processing module. If the pre-test preparations for the compressor are not completed, the preparation module sends a corresponding preparation problem signal to the control processing module for the tester to handle the preparation problem accordingly.
[0009] Preferably, the test system also includes a record storage module, which is used to record the cooling capacity of the compressor during the test under different test conditions into a record table, and the record table includes recording the compressor cooling capacity data, gas circuit mass flow meter data, exhaust pressure of the exhaust regulating valve, liquid circuit mass flow meter data, liquid circuit regulating valve valve opening, gas circuit regulating valve valve opening and compressor suction temperature and suction pressure, which are recorded and stored for the tester to review.
[0010] Preferably, the exhaust pressure test range is 0.5-4.5 MPa.A, the exhaust temperature test range is 20-200°C, the suction pressure test range is 0.05-2 MPa.A, the suction temperature test range is -40-50°C, and the compressor capacity range is 30-300kW.
[0011] The present invention has the following beneficial effects: The present invention can effectively utilize the cold and hot resources of the compressor refrigeration cycle. Unlike the traditional second refrigerant calorimeter method, which independently matches high-power electric heating to neutralize the refrigeration capacity of the compressor, the mixer method can greatly reduce the footprint of the equipment. The device can also accurately control the working condition requirements of the gas-liquid ratio (i.e. dryness) at the suction end of the compressor according to customer needs, and can meet the test of the simulation compressor regular defrosting working condition and liquid start-up mode, providing effective data support for product research and development and improvement.
[0012] The present invention sets up a test device and uses an exhaust regulating valve, a liquid circuit regulating valve and an exhaust regulating valve to control various operating points of the compressor, thereby greatly improving the stability during the test; The present invention provides a mixer to directly inject high-temperature and high-pressure gas that has not been condensed by the condenser into the mixer through a gas circuit regulating valve, and at the same time inject high-pressure and low-temperature liquid that has been condensed by the condenser into the mixer through a liquid circuit regulating valve. At this time, the mixer contains a gas-liquid refrigerant mixture, thereby achieving a gas-liquid equilibrium state, thereby directly injecting refrigerant into the air inlet of the compressor, thereby minimizing the energy consumption of the test device. At the same time, the total circuit and total water requirements on the equipment end are also greatly reduced, and the footprint of the test device is reduced, providing a multi-functional test mode selection.
[0013] The present invention provides a test system to control the test equipment, thereby being able to accurately and stably measure the refrigeration capacity of the compressor, and having a simple and effective structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.
[0015] Figure 1 A structural principle diagram of a high-precision and high-capacity compressor performance testing device provided by the present invention; Figure 2 The present invention provides a refrigeration cycle pressure-enthalpy diagram that satisfies the requirements of a high-precision, high-capacity compressor performance test device.
[0016] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Compressor; 2. Gas path mass flow meter; 3. Exhaust regulating valve; 4. Condenser; 5. Liquid storage tank; 6. Liquid path mass flow meter; 7. Liquid path regulating valve; 8. Gas path regulating valve; 9. Mixer; 10. Liquid injection circuit. DETAILED DESCRIPTION
[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0018] See also Figure 1-2 The present invention is a high-precision and high-capacity compressor performance test device, including a test system and a test device that establishes a control connection therewith, wherein the test device includes a gas path mass flowmeter 2, the gas path mass flowmeter 2 is connected in series to the air outlet of the compressor 1, and the gas path mass flowmeter 2 is connected in series with the exhaust regulating valve 3, the exhaust regulating valve 3 is connected to the condenser 4 and the gas path regulating valve 8 respectively through a tee, the condenser 4 is connected in series with the liquid reservoir 5, the other end of the liquid reservoir 5 is connected to the liquid path mass flowmeter 6, one end of the liquid path mass flowmeter 6 is connected to the liquid path regulating valve 7 and the liquid injection circuit 10 respectively through a tee, one end of the liquid path regulating valve 7 and one end of the gas path regulating valve 8 are connected to the liquid inlet of the mixer 9 together; the air inlet of the compressor 1 is connected to the mixer 9 and the liquid injection circuit respectively through a tee; The test system includes a control processing module, and a measurement module, a regulation module, a balance calculation module and a liquid testing module which are respectively connected to the control processing module in communication; Control processing module: used to receive commands from other modules of the test system to control the operation of the test equipment, and to obtain the structural data of the test equipment and display it on the system center interface; Measuring module: used to measure the total gas path refrigerant mass flow rate under different working conditions through the gas path mass flow meter 2, so as to determine the cooling capacity of the compressor. The total gas path refrigerant mass flow rate is proportional to the cooling capacity. The larger the total gas path refrigerant mass flow rate, the larger the cooling capacity. The calculation formula is shown in formula ①: ①; in, is the refrigeration capacity of the compressor, in W or kW; W is the total gas path refrigerant mass flow rate measured by the gas path mass flowmeter 2, in kg / s; is the enthalpy of the refrigerant at the inlet of the mixer 9, in J / kg; is the enthalpy of the refrigerant at the outlet of the condenser 4, in J / kg; In the above formula, the mass flow rate, evaporation temperature and condensation temperature of the refrigerant are all important factors that need to be calculated. Usually, the mass flow rate of the refrigerant can be calculated by its volume flow rate and density, while the evaporation temperature and condensation temperature are related to the working environment and refrigeration requirements of the equipment; In order to improve the cooling efficiency, we need to adjust the coolant flow according to the specific situation. If the cooling efficiency is found to be poor, the coolant flow can be appropriately increased to improve the cooling effect. However, it should be noted that excessive increase in coolant flow will lead to increased energy consumption, so it is necessary to adjust according to the actual situation. In addition, it is also necessary to pay attention to the cleaning and maintenance of the refrigerator to ensure its normal operation.
[0019] Adjustment module: used to control the exhaust regulating valve 3 to automatically adjust the valve size by using electrical analog quantity, thereby controlling the exhaust pressure of the compressor 1, so as to meet the corresponding working conditions of the compressor, so as to achieve the test requirements of the compressor under different working conditions; It is used to control the size of the valve by controlling the liquid circuit regulating valve 7 using the electrical analog quantity, thereby controlling the suction temperature of the compressor 1 and ensuring that the compressor 1 operates normally within the test suction temperature range; within the test suction temperature range, the higher the suction temperature of the compressor, the smaller the cooling capacity, and conversely, the lower the suction temperature of the compressor 1, the larger the cooling capacity; there is a close relationship between the suction temperature of the compressor and the cooling capacity. When the suction temperature is high, the cooling capacity will decrease; conversely, when the suction temperature is low, the cooling capacity will increase. This is because the suction temperature directly affects the physical state of the refrigerant and the operating efficiency of the compressor; specifically, when the suction temperature of the compressor is high, the specific volume of the refrigerant when it enters the compressor is large, and the unit volume cooling capacity of the compressor is reduced, resulting in a decrease in the overall cooling capacity. On the contrary, when the suction temperature is low, the specific volume of the refrigerant is small, the unit volume cooling capacity of the compressor increases, and the cooling capacity also increases accordingly. In addition, too low a suction temperature may cause the refrigerant liquid to be sucked into the compressor, causing a "liquid hammer" phenomenon, affecting the normal operation of the compressor. It is used to control the gas circuit regulating valve 8 by using electrical analog quantity to automatically adjust the size of the valve, thereby controlling the suction pressure of the compressor 1, and ensuring that the compressor 1 operates normally within the test suction pressure range; the relationship between the compressor suction pressure and the cooling capacity is mainly reflected in the compression ratio. The compression ratio refers to the ratio of the compressor exhaust pressure to the suction pressure. The size of the exhaust pressure and the suction pressure is determined by the operating conditions of the refrigerator. The lower the evaporation temperature, the lower the corresponding evaporation pressure, and the lower the suction pressure of the compressor; the higher the condensation temperature, the higher the corresponding condensation pressure, and the higher the exhaust pressure of the compressor. As the compression ratio increases, the exhaust volume of the compressor will decrease, and the cooling capacity will decrease accordingly. Balance calculation module: used to test the mass flow rate of liquid refrigerant under different working conditions by controlling the liquid mass flow meter 6 to ensure that the gaseous refrigerant and liquid refrigerant entering the mixer 9 meet the air intake requirements of the compressor 1 under the test conditions; Liquid test module: used to simulate the air conditioning defrost condition and the compressor liquid start-up test by controlling the liquid spray circuit 10, wherein the liquid spray circuit 10 is provided with a liquid spray flow meter, a pressure gauge and a thermometer, the liquid spray flow meter is used to measure the return liquid flow rate, and the pressure gauge and the thermometer are used to measure the liquid refrigerant pressure and temperature of the liquid return liquid.
[0020] When used by personnel, for large-capacity compressors, defrosting and liquid-carrying start-up often occur in actual applications, so a circuit is added after the liquid mass flowmeter to meet the test requirements. This function is: when the compressor is stopped, the balance valve remains closed, the low-pressure suction valve is closed, the filling valve is opened, and the flow rate is calculated. Liquid is supplied to the low-pressure chamber of the compressor, and the supply time can be freely set by Party A. After the liquid supply time stops, the compressor starts. When the set value is reached, the high-pressure pneumatic filling valve is closed, and the low-pressure suction valve is started at the same time. After running for the set time, the compressor stops and enters the next liquid injection cycle.
[0021] Among them, the control processing module obtains various structural data of the test equipment and displays them on the system center interface, including the following structural data: gas circuit mass flow meter 2 data, exhaust control valve 3 valve opening and real-time exhaust pressure, liquid circuit mass flow meter 6 data, liquid circuit control valve 7 valve opening, gas circuit control valve 8 valve opening and compressor 1 suction temperature and suction pressure.
[0022] Among them, the test system also includes a preparation module, which is used for pre-test preparations after the compressor 1 is installed on the test equipment, including vacuuming the entire test equipment connected to the compressor 1, checking the sealing of the connection positions between the air inlet and air outlet of the compressor 1 and the test equipment, and injecting sufficient refrigerant to ensure the normal operation of the compressor. After the pre-test preparations for the compressor are completed, the preparation module sends a preparation completion command to the control processing module. If the pre-test preparations for the compressor are not completed, the preparation module sends a corresponding preparation problem signal to the control processing module for the tester to handle the preparation problem accordingly.
[0023] Among them, the test system also includes a record storage module, which is used to record the cooling capacity of the compressor during the test under different test conditions into a record table. The record table includes recording the compressor cooling capacity data, the gas path mass flow meter 2 data, the exhaust pressure of the exhaust regulating valve 3, the liquid path mass flow meter 6 data, the valve opening of the liquid path regulating valve 7, the valve opening of the gas path regulating valve 8 and the suction temperature and suction pressure of the compressor 1, which are recorded and stored for the tester to review.
[0024] See also Figure 2, the ordinate lg P of the refrigeration cycle pressure-enthalpy diagram is pressure, and the abscissa h is enthalpy value, wherein the refrigerant is in a gaseous state inside the compressor 1, and the refrigerant pressure increases continuously during the compression process, and the enthalpy value increases; the refrigerant pressure is reduced by the exhaust regulating valve 3, and the enthalpy value remains unchanged, and it remains in a gaseous state; after the refrigerant enters the condenser 4, the enthalpy value decreases, and the pressure remains unchanged, and the refrigerant changes from a gaseous state to a gas-liquid mixed state, and then to a liquid state; then, the refrigerant maintains a liquid state through the liquid circuit regulating valve 7, the pressure decreases, and the enthalpy value remains unchanged; a part of the high-pressure and low-temperature liquid refrigerant and a part of the high-pressure and high-temperature gaseous refrigerant enter the mixing box 9 together, and are mixed into a low-pressure gas-liquid mixed refrigerant.
[0025] Among them, the exhaust pressure test range is 0.5~4.5Mpa.A, the exhaust temperature test range is 20~200℃, the suction pressure test range is 0.05~2MPa.A, the suction temperature test range is -40~50℃, and the compressor capacity range is 30~300kW. The core indicators of the present invention are shown in Table 1: Table 1
[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A high-precision and high-capacity compressor performance test device, characterized in that: The invention comprises a test system and a test device connected to the test system, wherein the test device comprises a gas path mass flow meter (2), the gas path mass flow meter (2) is connected in series to the gas outlet of the compressor (1), and the gas path mass flow meter (2) is connected in series to an exhaust regulating valve (3), the exhaust regulating valve (3) is connected to a condenser (4) and a gas path regulating valve (8) through a tee, the condenser (4) is connected in series to a liquid reservoir (5), the other end of the liquid reservoir (5) is connected to a liquid path mass flow meter (6), one end of the liquid path mass flow meter (6) is connected to a liquid path regulating valve (7) and a liquid injection circuit (10) through a tee, one end of the liquid path regulating valve (7) and one end of the gas path regulating valve (8) are connected to a liquid inlet of a mixer (9); the gas inlet of the compressor (1) is connected to the mixer (9) and the liquid injection circuit through a tee; The test system includes a control processing module, and a measurement module, a regulation module, a balance calculation module and a liquid testing module which are respectively connected to the control processing module in communication; Control processing module: used to receive commands from other modules of the test system to control the operation of the test equipment, and to obtain the structural data of the test equipment and display it on the system center interface; Measuring module: used to measure the total gas path refrigerant mass flow rate under different working conditions through the gas path mass flow meter (2), so as to determine the refrigeration capacity of the compressor. The total gas path refrigerant mass flow rate is proportional to the refrigeration capacity. The larger the total gas path refrigerant mass flow rate, the larger the refrigeration capacity. The calculation formula is shown in formula ①: ①； in, is the cooling capacity of the compressor, in W or kW; W is the total gas path refrigerant mass flow rate measured by the gas path mass flow meter (2), in kg / s; is the enthalpy of the refrigerant at the inlet of the mixer (9), in J / kg; is the enthalpy of the refrigerant at the outlet of the condenser (4), in J / kg; A regulating module: used to control the exhaust regulating valve (3) to automatically adjust the valve size by using electrical analog quantity, thereby controlling the exhaust pressure of the compressor (1), thereby satisfying the corresponding working conditions of the compressor, thereby meeting the testing requirements of the compressor under different working conditions; The invention is used to control the suction temperature of the compressor (1) by automatically adjusting the valve size by using an electrical analog quantity through controlling the liquid circuit regulating valve (7) to ensure that the compressor (1) operates normally within a test suction temperature range; within the test suction temperature range, the higher the suction temperature of the compressor, the smaller the refrigeration capacity; conversely, the lower the suction temperature of the compressor (1), the larger the refrigeration capacity; The device is used to control the gas path regulating valve (8) to automatically adjust the valve size by using an electrical analog quantity, thereby controlling the suction pressure of the compressor (1) to ensure that the compressor (1) operates normally within the test suction pressure range; A balance calculation module: used to test the mass flow rate of the liquid circuit refrigerant under different working conditions by controlling the liquid circuit mass flow meter (6) to ensure that the gaseous refrigerant and the liquid refrigerant entering the mixer (9) meet the air intake requirements of the compressor (1) under the test working conditions; The liquid-carrying test module is used to simulate the defrosting condition of the air conditioner and the liquid-carrying start-up test of the compressor by controlling the liquid-carrying circuit (10), wherein the liquid-carrying circuit (10) is provided with a liquid-carrying flowmeter, a pressure gauge and a thermometer, the liquid-carrying flowmeter is used to measure the return liquid flow rate, and the pressure gauge and the thermometer are used to measure the pressure and temperature of the liquid refrigerant of the return liquid.
2. A high-precision and high-capacity compressor performance testing device according to claim 1, characterized in that: The control processing module obtains various structural data of the test equipment and displays them on the system center interface, including the following structural data: gas path mass flow meter (2) data, exhaust control valve (3) valve opening and real-time exhaust pressure, liquid path mass flow meter (6) data, liquid path control valve (7) valve opening, gas path control valve (8) valve opening and compressor (1) suction temperature and suction pressure.
3. A high-precision and high-capacity compressor performance testing device according to claim 2, characterized in that: The test system further comprises a preparation module, which is used for pre-test preparation work after the compressor (1) is installed in the test equipment, including evacuating the entire test equipment connected to the compressor (1), checking the sealing of the connection position between the air inlet and the air outlet of the compressor (1) and the test equipment, and injecting sufficient refrigerant to ensure the normal operation of the compressor. After the pre-test preparation work of the compressor is completed, the preparation module sends a preparation completion command to the control processing module. If the pre-test preparation work of the compressor is not completed, the preparation module sends a corresponding preparation problem signal to the control processing module so that the tester can perform corresponding processing according to the preparation problem.
4. A high-precision and high-capacity compressor performance testing device according to claim 3, characterized in that: The test system further comprises a recording storage module, which is used to record the refrigeration capacity of the compressor during the test process under different test conditions into a recording table, wherein the recording table includes recording compressor refrigeration capacity data, gas path mass flow meter (2) data, exhaust pressure of the exhaust regulating valve (3), liquid path mass flow meter (6) data, valve opening of the liquid path regulating valve (7), valve opening of the gas path regulating valve (8) and suction temperature and suction pressure of the compressor (1), and the records are stored for the tester to consult.
5. A high-precision and high-capacity compressor performance testing device according to claim 4, characterized in that: The exhaust pressure test range is 0.5-4.5 MPa.A, the exhaust temperature test range is 20-200°C, the suction pressure test range is 0.05-2 MPa.A, the suction temperature test range is -40-50°C, and the compressor capacity range is 30-300kW.