CN216645821U - Performance comparison test experiment table for different throttling devices of automobile air conditioner - Google Patents
Performance comparison test experiment table for different throttling devices of automobile air conditioner Download PDFInfo
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- CN216645821U CN216645821U CN202123181826.7U CN202123181826U CN216645821U CN 216645821 U CN216645821 U CN 216645821U CN 202123181826 U CN202123181826 U CN 202123181826U CN 216645821 U CN216645821 U CN 216645821U
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Abstract
The utility model discloses a performance comparison test experiment table for different throttling devices of an automobile air conditioner, which is characterized by comprising a refrigerant circulation loop, a cooling medium circulation loop and a heat medium circulation loop; the refrigerant circulating loop comprises a compressor, a condenser, a dryer, a throttling device testing trunk and an evaporator which are sequentially connected; the cooling medium circulation loop comprises a condenser, a water chilling unit and a cold water flow regulating valve which are connected in sequence; the heat medium circulation loop comprises an evaporator, a hot water unit and a hot water flow regulating valve which are connected in sequence. The utility model provides a test bench for testing refrigerating capacity of throttling devices of different types, different forms and different principles for an automobile air conditioner and analyzing the influence of the throttling devices on the whole system. The utility model can change the change of the condensation temperature of the automobile air conditioner by setting the water temperature of the water chilling unit and adjusting the flow of cooling water, and can test the influence of different throttling devices on the system performance under different condensation temperatures.
Description
Technical Field
The utility model relates to an automobile air conditioner test experiment table, in particular to an automobile air conditioner performance comparison test experiment table for different throttling devices.
Background
With the rapid development of the automobile industry in China, the automobile air conditioner is vigorously developed in China as one of the modernization signs of the automobile technology. The automobile air conditioner greatly improves the riding environment of drivers and passengers and improves the comfort of the automobile. Various types of sophisticated multifunctional air conditioners have been developed and have been popular with users in recent years. The automobile air conditioner is an indispensable part of modern automobiles, a part of automobile energy is consumed while the driving environment of drivers and passengers is improved, and the energy consumption proportion of the refrigeration of the general automobile air conditioner accounts for about 15 percent of the energy consumption of the whole automobile. With the high-speed development of new energy automobiles, in order to achieve the aim of gradually replacing fuel automobiles by the new energy automobiles, the endurance mileage of the new energy automobiles is ensured, and the reduction of the energy consumption of automobile air conditioners is one of the ways of reducing the comprehensive energy consumption of the automobiles.
To achieve maximum cooling, the flow rate into the evaporator must be controlled to ensure complete evaporation of the liquid refrigerant in the evaporator. The throttling device is a main part forming the automobile air-conditioning refrigerating device, is arranged at the inlet of the evaporator and is a dividing point between high pressure and low pressure of the automobile air-conditioning refrigerating system, and has the functions of throttling and decompressing high-pressure liquid refrigerant from the liquid reservoir, adjusting and controlling the amount of the liquid refrigerant entering the evaporator to adapt to the change of refrigerating load, and simultaneously preventing the liquid impact phenomenon of the compressor and the abnormal overheating phenomenon of steam at the outlet of the evaporator. At present, the throttle device of the automobile air conditioner is mainly a thermal expansion valve, comprising an H type and an F type; the electronic expansion valve comprises an electromagnetic expansion valve and an electric expansion valve; and the orifice pipe comprises a conventional orifice pipe and a variable orifice pipe.
The thermal expansion valve for the automobile air conditioning system is divided into two forms according to the balance force, namely an inner balance type thermal expansion valve and an outer balance type thermal expansion valve. The inner balance type refrigerating system is a refrigerating cycle control system which is most widely applied at present. After the automobile air conditioner adopts the electronic expansion valve, the operation of the refrigerating system can be controlled by the electric control unit through parameters such as temperature, pressure and the like at the outlet of the evaporator. The electronic expansion valve is composed of a detection part, a control part and an execution part 3. The driving methods are classified into electromagnetic and electrodynamic methods. The orifice pipe is a fixed orifice throttling device, and both ends are provided with filter screens to prevent the system from being blocked. The orifice tube is mounted on the high pressure side of the system, as is the expansion valve.
At present, models or real vehicles are mostly adopted for teaching of the throttling device of the automobile air conditioner to demonstrate the working principle and the refrigerating effect of the throttling device. Only one type of throttling device is arranged in the refrigerating system, and the throttling devices of different types and principles cannot be visually tested and compared. Therefore, the utility model provides the experiment table which can compare the refrigeration effect and the influence on the system of various throttling devices with different structural forms and different types. The experiment table can be used for testing and analyzing the refrigerating performance of the throttling devices with different structural forms under the same working condition or different working conditions, also can be used for testing and analyzing the refrigerating performance of the same throttling device under different working environments, and obtains reliable data through experimental tests. The teaching device is used for improving the intuition and the teaching quality of the automobile air conditioner teaching.
Disclosure of Invention
The utility model provides a test bench for comparing and testing the performances of different throttling devices of an automobile air conditioner, aiming at solving the technical problems in the prior art.
The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: a performance comparison test experiment table for different throttling devices of an automobile air conditioner comprises a refrigerant circulation loop, a cooling medium circulation loop and a heat medium circulation loop; the refrigerant circulating loop comprises a compressor, a condenser, a dryer, a throttling device testing trunk and an evaporator which are sequentially connected; the cooling medium circulation loop comprises a condenser, a water chilling unit and a cold water flow regulating valve which are connected in sequence; the heat medium circulation loop comprises an evaporator, a hot water unit and a hot water flow regulating valve which are connected in sequence; wherein:
the throttling device test trunk comprises a trunk input port and a trunk output port; a plurality of test branches are connected in parallel between the trunk input port and the trunk output port; each test branch comprises a test stop valve and a throttling device test interface; the throttling device test interface comprises an input interface and an output interface; the input port of the throttling device to be tested is communicated with the input interface; the output port of the throttling device to be tested is communicated with the output interface; the input port of the test stop valve is communicated with the input port of the trunk; the input interface is communicated with the output port of the test stop valve; the output interface is communicated with the output port of the trunk; the input port of the main path is communicated with the output port of the dryer;
the condenser comprises a refrigerant input port, a refrigerant output port, a cold medium input port and a cold medium output port, and the refrigerant output port of the condenser is communicated with the input port of the dryer; the refrigerant input port is communicated with the compressor output port; the cold medium input port is communicated with the output port of the first flow regulating valve; the cold medium output port is communicated with the input port of the water chilling unit;
the evaporator comprises a refrigerant input port, a refrigerant output port, a heat medium input port and a heat medium output port, and the refrigerant output port of the evaporator is communicated with the compressor input port; the refrigerant input port is communicated with the main path output port of the throttle device test main path; the heat medium input port is communicated with the output port of the second flow regulating valve; the hot medium output port is communicated with the input port of the hot water unit;
a pressure transmitter is arranged at the refrigerant output port of the condenser; a pressure transmitter and a temperature sensor are arranged at the input port of the compressor; the evaporator is characterized in that a refrigerant input port of the evaporator is provided with a temperature sensor, a heat medium input port and a heat medium output port of the evaporator are respectively provided with a temperature sensor, a mass flowmeter is arranged in a refrigerant circulation loop, and a heat medium flowmeter is arranged in a heat medium circulation loop; a cooling medium flow meter is provided in the cooling medium circulation circuit.
Further, the compressor is an inverter compressor.
Further, a pressure transmitter is provided at the refrigerant input of the evaporator.
Further, a pressure transmitter is provided at the refrigerant input port of the condenser.
Further, a temperature sensor is provided at the input port of the condenser.
Further, a temperature sensor is arranged at the output port of the condenser.
Further, the cooling medium circulation circuit is provided with a cooling medium flow meter.
Further, a liquid scope is also provided in the refrigerant circulation circuit.
Further, the hot water unit is a constant temperature hot water unit.
Further, constant temperature hot water unit includes: the constant-temperature water tank, the water pump communicated with the constant-temperature water tank, the electric heater and the temperature sensor are positioned in the constant-temperature water tank; the electric heater is used for heating water in the constant-temperature water tank; the temperature sensor is used for detecting the temperature of water in the constant-temperature water tank; the water pump is used for circulating water in the heat medium circulation loop; when the temperature value detected by the temperature sensor is smaller than a set threshold value, the electric heater is started to heat; when the temperature value detected by the temperature sensor is larger than the set threshold value, the electric heater stops heating.
The utility model has the advantages and positive effects that:
the utility model aims to provide a laboratory table for testing refrigerating capacity of throttling devices of different types, different forms and different principles for an automobile air conditioner and analyzing the influence of the throttling devices on the whole system. The system comprises a plurality of groups of throttling devices with different types and the same refrigerating capacity. A plurality of groups of throttling devices in different forms share one compressor, one condenser and one evaporator. During the experiment, the change of the refrigerating capacity of one throttling device under different compressor rotating speeds or different voltage inputs can be tested independently. During the experiment, one throttling device is selected, stop valves in front of other throttling devices are closed, the evaporation temperature of the system is adjusted by setting the water temperature of a water tank after the system runs, the condensation temperature is adjusted by setting the water temperature of a water chilling unit and changing the flow rate of cooling water, the rotating speed of a compressor is changed by changing the input frequency or the input voltage of the compressor, after the system runs stably, the refrigerating capacity of the system at the moment is measured, the input power of the compressor at the moment is measured, and the refrigerating performance coefficient of the system under the throttling device is obtained through the ratio of the refrigerating capacity to the input power. The system can obtain the intuitive refrigerating capacity change and refrigerating performance coefficient change under the same evaporation temperature and different compressor rotating speeds or different compressor input voltages, and can obtain the optimal rotating speed or the optimal input voltage for the operation of the automobile air conditioner. The system can change the change of the condensation temperature of the automobile air conditioner through setting the water temperature of the water chilling unit and adjusting the flow of cooling water, and can test the influence of different throttling devices on the performance of the system under different condensation temperatures. Through data analysis, refrigeration effects and system influence on various throttling devices with different structural forms and different types can be contrastively analyzed.
The setting of condensation temperature and evaporation temperature can be realized by adjusting the temperature of cooling water and freezing water, and the requirements of different working conditions are met.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. a liquid viewing mirror; 2. a mass flow meter; 3. a liquid storage dryer; 4. a first temperature sensor; 5. a first pressure transmitter; 6. a cold water flow meter; 7. a second temperature sensor; 8. a water chilling unit; 9. a cold water stop valve; 10. a third temperature sensor; 11. a cold water flow regulating valve; 12. a condenser; 13. a second pressure transmitter; 14. a fourth temperature sensor; 15. a compressor; 16. a fifth temperature sensor; 17. a third pressure transmitter; 18. an evaporator; 19. a sixth temperature sensor; 20. a fourth pressure transmitter; 21. a seventh temperature sensor; 22. an eighth temperature sensor; 23. a water tank temperature sensor; 24. a water tank input stop valve; 25. a heater power meter; 26. a water replenishing stop valve; 27. a heater; 28. a constant temperature water tank; 29. a water tank output stop valve; 30. a dirt separator; 31. a water pump; 32. a one-way valve; 33. a hot water flow regulating valve; 34. a hot water flow meter; 401. a first throttle cut valve; 402. a second throttle stop valve; 403. a third throttling cut-off valve; 404. an Nth throttling stop valve; 501. a first throttling device; 502. a second throttling device; 503. a third throttling means; 504. and an Nth throttling device.
Detailed Description
For a further understanding of the contents, features and effects of the utility model, reference will now be made to the following examples, which are to be read in connection with the accompanying drawings, wherein:
referring to fig. 1, a test bench for comparing the performance of different throttling devices of an automobile air conditioner comprises a refrigerant circulation loop, a cooling medium circulation loop and a heat medium circulation loop; the refrigerant circulation loop comprises a compressor 15, a condenser 12, a dryer, a throttling device test trunk and an evaporator 18 which are connected in sequence; the cooling medium circulation loop comprises a condenser 12, a water chilling unit 8 and a cold water flow regulating valve 11 which are connected in sequence; the heat medium circulation loop comprises an evaporator 18, a hot water unit and a hot water flow regulating valve 33 which are connected in sequence; wherein:
the throttling device test trunk comprises a trunk input port and a trunk output port; a plurality of test branches are connected in parallel between the trunk input port and the trunk output port; each test branch comprises a test stop valve and a throttling device test interface; the throttling device test interface comprises an input interface and an output interface; the input port of the throttling device to be tested is communicated with the input interface; the output port of the throttling device to be tested is communicated with the output interface; the input port of the test stop valve is communicated with the input port of the trunk; the input interface is communicated with the output port of the test stop valve; the output interface is communicated with the output port of the trunk; the input port of the main path is communicated with the output port of the dryer;
a condenser 12 including a refrigerant input port, a refrigerant output port, a cooling medium input port and a cooling medium output port, the refrigerant output port being in communication with the input port of the dryer; the refrigerant input port of the compressor is communicated with the output port of the compressor 15; the cold medium input port is communicated with the output port of the first flow regulating valve; the cold medium output port is communicated with the input port of the water chilling unit 8;
an evaporator 18 including a refrigerant input port, a refrigerant output port, a heat medium input port, and a heat medium output port, the refrigerant output port thereof being in communication with the compressor 15 input port; the refrigerant input port is communicated with the main path output port of the throttling device test main path; the heat medium input port is communicated with the output port of the second flow regulating valve; the hot medium output port is communicated with the input port of the hot water unit;
a pressure transmitter is arranged at the refrigerant output port of the condenser 12; a pressure transmitter and a temperature sensor are arranged at the input port of the compressor 15; a temperature sensor is arranged at a refrigerant input port of the evaporator 18, a temperature sensor is respectively arranged at a heat medium input port and a heat medium output port of the evaporator 18, a mass flow meter 2 is arranged in a refrigerant circulation loop, and a heat medium flow meter is arranged in a heat medium circulation loop; a cooling medium flow meter is provided in the cooling medium circulation circuit.
Referring to fig. 1, a first pressure transmitter 5 is arranged at a refrigerant output port of a condenser 12; a second pressure transmitter 13 and a fourth temperature sensor 14 are arranged at a main path input port of the compressor testing main path; a sixth temperature sensor 19 is provided at a refrigerant inlet of the evaporator 18, and a seventh temperature sensor 21 is provided at a heat medium inlet of the evaporator 18; an eighth temperature sensor 22 is provided at the heat medium outlet of the evaporator 18, and a hot water flow meter 34 is provided in the heat medium circulation circuit; a mass flow meter 2 is provided in the refrigerant circulation circuit.
The experiment table for the performance comparison test of different throttling devices of the automobile air conditioner can perform comparison test on the performance of different throttling devices. The experiment table can measure the performance comparison of various throttling devices under different working conditions, such as the rotating speed of the compressor 15, the refrigerating capacity, the heat dissipating capacity of the condenser 12, the heat absorption of the evaporator 18 and other working condition parameter conditions.
The utility model relates to a performance comparison test experiment table for different throttling devices of an automobile air conditioner, which is provided with a plurality of groups of throttling devices, wherein a plurality of groups of throttling devices such as electronic expansion valves, thermal expansion valves, throttling hole pipes and the like with the same refrigerating capacity can be additionally arranged in a system, and the refrigerating capacity and the refrigerating performance coefficient of different throttling devices under the same working condition at the same evaporation temperature are compared; for the same throttling device, the refrigerating capacity and the refrigerating performance coefficient are changed under different evaporation temperatures and different condensation temperatures; the change rule of the refrigerating capacity and the refrigerating performance coefficient under different throttling devices is found by changing the rotating speed of the compressor 15 or changing the input voltage of the compressor 15, and the most energy-saving rotating speed or voltage is found when the automobile air conditioner is used.
The system measures the cooling capacity including a refrigerant liquid flow meter method, a dry refrigerant calorimeter method, and an evaporator 18 side thermal balance method. The system measures the input power and the rotating speed of the compressor 15 directly through a power meter and a rotating speed sensor.
The compressor 15 may be a crankshaft link compressor 15, a wobble plate compressor 15, a swash plate compressor 15, a rotary compressor 15, or a scroll compressor 15.
The throttling device can be a thermal expansion valve, an electronic expansion valve or a throttling hole pipe.
The constant temperature water tank 28 may be a pressure-bearing water tank, with a heating function, and may be a vertical or horizontal water tank.
The condenser 12 is a water-cooled condenser 12, and may be a shell-and-tube heat exchanger, a double-tube heat exchanger, or a plate heat exchanger.
The evaporator 18 is a water-cooled evaporator 18, which may be a shell-and-tube heat exchanger, a double-tube heat exchanger, or a plate heat exchanger.
Preferably, the compressor 15 is an inverter compressor 15. The variable frequency compressor can change the output rotating speed and torque of the compressor and change the test conditions.
Preferably, a pressure transducer may be provided at the refrigerant input of the evaporator 18. As shown in fig. 1, a fourth pressure transducer 20 is provided at the refrigerant input of the evaporator 18. A fourth pressure transmitter 20 is provided for measuring the refrigerant pressure at the refrigerant input of the evaporator 18.
Preferably, a pressure transducer may be provided at the refrigerant input of the condenser 12. As shown in fig. 1, a second pressure transmitter 13 is provided at the refrigerant input port of the condenser 12. A second pressure transmitter 13 is provided for measuring the refrigerant pressure at the refrigerant input of the condenser 12.
Preferably, a temperature sensor may be provided at the refrigerant input of the condenser 12. As shown in fig. 1, a fourth temperature sensor 14 is provided at the refrigerant input port of the condenser 12. A fourth temperature sensor 14 is provided for measuring the refrigerant temperature at the refrigerant input of the condenser 12.
Preferably, a temperature sensor may be provided at the refrigerant outlet of the condenser 12. As shown in fig. 1, a first temperature sensor 4 is provided at a refrigerant outlet of the condenser 12. The first temperature sensor 4 is provided for measuring the refrigerant temperature at the refrigerant outlet of the condenser 12.
Preferably, the cooling medium circulation circuit may be provided with a cooling medium flow meter. A cold medium flow meter (cold water flow meter 6 in fig. 1) is provided for measuring the flow of cold medium cold water.
Preferably, a liquid observation mirror 1 may be further provided in the refrigerant circulation circuit. The liquid viewing mirror 1 is provided for visually observing whether liquid flows.
Preferably, the hot water unit may be a constant temperature hot water unit.
Preferably, the constant temperature hot water unit may include: the constant-temperature water tank 28, a water pump 31 communicated with the constant-temperature water tank 28, an electric heater 27 positioned in the constant-temperature water tank 28, a water tank temperature sensor 23 and a heater power meter 25; the electric heater 27 is used for heating water in the constant-temperature water tank 28; the tank temperature sensor 23 is used to detect the temperature of water in the constant-temperature water tank 28; the heater power meter 25 is used to measure the input power of the electric heater 27. The water pump 31 is used to circulate water in the heat medium circulation circuit; when the temperature value detected by the water tank temperature sensor 23 is smaller than the set threshold value, the electric heater 27 starts heating; when the temperature value detected by the tank temperature sensor 23 is greater than a set threshold value, the electric heater 27 stops heating. The constant temperature water tank 28 is a pressure-bearing water tank, has a heating function, and can be a vertical or horizontal water tank.
The working principle of the utility model is as follows:
as shown in fig. 1, a performance comparison test experiment table for different throttling devices of an automobile air conditioner is characterized by comprising a refrigerant circulation loop, a cooling medium circulation loop and a heat medium circulation loop. The refrigerant circulation loop comprises a compressor 15, a condenser 12, a liquid storage dryer 3, a mass flow meter 2, a liquid sight glass 1, a throttling device test trunk and an evaporator 18 which are connected in sequence. The cooling medium circulation loop comprises a condenser 12, a cold water flowmeter 6, a cold water stop valve 9, a cold water unit 8 and a cold water flow regulating valve 11 which are connected in sequence. The heat medium circulation loop comprises an evaporator 18, a water tank input stop valve 24, a constant temperature water tank 28, a water tank output stop valve 29, a dirt separator 30, a water pump 31, a one-way valve 32, a hot water flow regulating valve 33 and a hot water flow meter 34 which are connected in sequence.
The constant temperature water tank 28 is provided with a water replenishment stop valve 26, and circulating water is replenished through the water replenishment stop valve 26. The output port of the constant temperature water tank 28 is connected with the dirt separator 30 through the water tank output stop valve 29, the dirt separator 30 is connected with the input port of the water pump 31, the output port of the water pump 31 is connected with the one-way valve 32, the one-way valve 32 is connected with the hot water flow regulating valve 33, the output port of the hot water flow regulating valve 33 is connected with the input port of the hot water flow meter 34, the output port of the hot water flow meter 34 is connected with the hot medium input port of the evaporator 18, and the hot medium output port of the evaporator 18 is connected with the input port of the constant temperature water tank 28 through the throttling device 40.
The compressor 15 includes an input port and an output port, the input port of the compressor 15 is also called a suction port, and the output port of the compressor 15 is also called an exhaust port. The cooling medium is cooling water; the heat medium is hot water. Wherein:
the throttling device test trunk comprises a trunk input port and a trunk output port; a plurality of test branches are connected in parallel between the trunk input port and the trunk output port; each test branch comprises a test stop valve and a throttling device test interface; the throttling device test interface comprises an input interface and an output interface; the input port of the throttling device to be tested is communicated with the input interface; the output port of the throttling device to be tested is communicated with the output interface; the input interface of each test branch is communicated with the input port of the trunk; the output interface of each test branch is correspondingly communicated with the input port of the test stop valve of the branch; the input port of the test stop valve of each test branch is communicated with the input port of the trunk; the input port of the main path is communicated with the output port of the dryer; the throttle device to be tested comprises a thermal expansion valve, an electronic expansion valve and a throttle hole pipe; the input ports of the throttling devices such as the thermal expansion valve, the electronic expansion valve, the orifice pipe and the like are communicated with the output port of the dryer.
In the preferred embodiment, a liquid viewing mirror 1 is arranged between the input port of the trunk and the dryer, and the input port of the liquid viewing mirror 1 is communicated with the output port of the dryer; the output port of the liquid sight glass 1 is communicated with the input port of the trunk. Namely, the output port of the liquid sight glass 1 is connected with a thermal expansion valve, an electronic expansion valve and a throttling hole pipe through corresponding throttling stop valves. As shown in fig. 1, the output port of the liquid viewing mirror 1 is connected with a first throttling device 501 through a first throttling stop valve 401; an output port of the liquid sight glass 1 is connected with a second throttling device 502 through a second throttling stop valve 402; the output port of the liquid sight glass 1 is connected with a third throttling device 503 through a third throttling stop valve 403; an output port of the liquid sight glass 1 is connected with an Nth throttling device 504 through an Nth throttling stop valve 404; the first throttling device 501 is a thermal expansion valve; the second throttle 502 may be an electronic expansion valve; the third throttling means 503 is a choke tube.
And controlling and testing a corresponding throttling device or a group of throttling devices by controlling the on-off of each throttling stop valve.
A condenser 12 including a refrigerant input port, a refrigerant output port, a cooling medium input port and a cooling medium output port, the refrigerant output port thereof being in communication with the input port of the dryer; the refrigerant input port of the compressor is communicated with the output port of the compressor 15; the cold medium input port is communicated with the output port of the cold water flow regulating valve 11; the cold medium output port is communicated with the input port of the water chilling unit 8; the cold medium is cold water, and the heat emitted by the condenser 12 can be controlled by controlling the temperature and the flow rate of the cold water as the cold medium.
An evaporator 18 including a refrigerant input port, a refrigerant output port, a heat medium input port, and a heat medium output port, the refrigerant output port thereof being in communication with the compressor 15 input port; the refrigerant input port is communicated with the main path output port of the throttle device test main path; i.e., thermostatic expansion valve, electronic expansion valve, orifice tube, etc., is connected to the refrigerant inlet of the evaporator 18. The hot medium input port is communicated with the output port of the hot water flow regulating valve 33; the hot medium output port is communicated with the input port of the hot water unit; the amount of heat absorbed by the evaporator 18 can be controlled by controlling the temperature and flow rate of the hot water as the heat medium.
A pressure transmitter is arranged at the refrigerant output port of the condenser 12; a pressure transmitter and a temperature sensor are arranged at the input port of the compressor 15; a temperature sensor is arranged at a refrigerant input port of the evaporator 18, a temperature sensor is respectively arranged at a heat medium input port and a heat medium output port of the evaporator 18, and a heat medium flow meter is arranged in a heat medium circulation loop; a mass flow meter 2 is provided in the refrigerant circulation circuit.
A first pressure transmitter 5 and a first temperature sensor 4 are arranged at a refrigerant output port of the condenser 12; a second temperature sensor 7 is arranged at a cold medium outlet of the condenser 12; a third temperature sensor 10 is arranged at a cold medium input port of the condenser 12, and a second pressure transmitter 13 and a fourth temperature sensor 14 are arranged at an output port of the compressor 15; a third pressure transmitter 17 and a fifth temperature sensor 16 are arranged at the input port of the compressor 15; a sixth temperature sensor 19 and a fourth pressure transmitter 20 are arranged at a refrigerant input port of the evaporator 18, a seventh temperature sensor 21 is arranged at a heat medium input port of the evaporator 18, an eighth temperature sensor 22 is arranged at a heat medium output port of the evaporator 18, and a heat medium flow meter is arranged in a heat medium circulation loop; a refrigerant mass flow meter 2 is provided in the refrigerant cycle circuit.
A condenser 12 including a refrigerant input port, a refrigerant output port, a cooling medium input port and a cooling medium output port, the refrigerant output port being in communication with the input port of the dryer; the refrigerant input port of the compressor is communicated with the output port of the compressor 15; the cold medium input port is communicated with the output port of the first flow regulating valve; the cold medium output port is communicated with the input port of the water chilling unit 8;
an evaporator 18 including a refrigerant input port, a refrigerant output port, a heat medium input port, and a heat medium output port, the refrigerant output port thereof being in communication with the compressor 15 input port; the refrigerant input port is communicated with the main path output port of the throttle device test main path; the heat medium input port is communicated with the output port of the second flow regulating valve; the hot medium output port is communicated with the input port of the hot water unit;
a pressure transmitter is arranged at the refrigerant output port of the condenser 12; a pressure transmitter and a temperature sensor are arranged at the input port of the compressor 15; a temperature sensor is arranged at a refrigerant input port of the evaporator 18, a temperature sensor is respectively arranged at a heat medium input port and a heat medium output port of the evaporator 18, and a heat medium flow meter is arranged in a heat medium circulation loop; a mass flow meter 2 is provided in the refrigerant circulation circuit.
The temperature sensor, the pressure transmitter, the flowmeter, the tachometer and the like correspondingly acquire signals such as temperature, pressure, flow, 15 rotating speed of the compressor and the like, and a data acquisition system of the experiment table for the performance comparison test of different throttling devices of the automobile air conditioner is formed. The data acquisition system is used for input and output ports of all main components of the refrigeration system, the temperature, the pressure and the flow rate in the device, the rotating speed and the power of a driving system of the compressor 15 and the like; the data acquisition system comprises a microprocessor, a temperature sensor, a pressure transmitter, a flowmeter, a tachometer and the like.
The data acquisition system consists of a computer system, a sensor, a data recorder and the like. The temperature, pressure, flow, rotating speed and power are tested, and a data recorder is used for carrying out data acquisition on the temperature sensor, the pressure transmitter, the flowmeter and the power transmitter.
According to the experiment table for the performance comparison test of different throttling devices of the automobile air conditioner, three different test methods including a refrigerant liquid flow meter method, a dry-type refrigerant calorimeter method and an evaporator 18-side thermal balance method can be adopted for the test of the refrigerating capacity, so that the test data are more accurate and reliable.
The performance comparison test experiment table for different throttling devices of the automobile air conditioner can test various working conditions, and can change the test working conditions by setting, wherein the test working conditions comprise condensation temperature, evaporation temperature, rotating speed of the compressor 15, input voltage of the compressor 15, freezing water flow, cooling water flow and the like. The test requirements on different operation conditions in the teaching process are met.
The compressor 15 can be a compressor 15 for an automobile air conditioner, and can also be other air conditioner compressors 15, the compressor 15 can be driven by a motor through belt transmission, or the motor can be driven by a transmission such as a coupler and a clutch, and the compressor 15 can be a power frequency compressor 15 or a variable frequency compressor 15.
The condenser 12 is a water-cooled condenser 12, which may be a double-tube heat exchanger, a shell-and-tube heat exchanger, or a plate heat exchanger.
The evaporator 18 may be a double tube heat exchanger, a shell and tube heat exchanger, and a plate heat exchanger.
The thermostatic expansion valve can be an inner balance type thermostatic expansion valve or an outer balance type thermostatic expansion valve, and can be an H-type thermostatic expansion valve or an F-type thermostatic expansion valve. The electronic expansion valve may be an electromagnetic expansion valve or an electric expansion valve. The hole pipe can be a conventional hole pipe or a variable throttle hole pipe.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to carry out the same, and the present invention shall not be limited to the embodiments, i.e. the equivalent changes or modifications made within the spirit of the present invention shall fall within the scope of the present invention.
Claims (10)
1. A performance comparison test experiment table for different throttling devices of an automobile air conditioner is characterized by comprising a refrigerant circulation loop, a cooling medium circulation loop and a heat medium circulation loop; the refrigerant circulating loop comprises a compressor, a condenser, a dryer, a throttling device testing trunk and an evaporator which are sequentially connected; the cooling medium circulation loop comprises a condenser, a water chilling unit and a cold water flow regulating valve which are connected in sequence; the heat medium circulation loop comprises an evaporator, a hot water unit and a hot water flow regulating valve which are connected in sequence; wherein:
the throttling device test trunk comprises a trunk input port and a trunk output port; a plurality of test branches are connected in parallel between the trunk input port and the trunk output port; each test branch comprises a test stop valve and a throttling device test interface; the throttling device test interface comprises an input interface and an output interface; the input port of the throttling device to be tested is communicated with the input interface; the output port of the throttling device to be tested is communicated with the output interface; the input port of the test stop valve is communicated with the input port of the trunk; the input interface is communicated with the output port of the test stop valve; the output interface is communicated with the main path output port; the input port of the main path is communicated with the output port of the dryer;
the condenser comprises a refrigerant input port, a refrigerant output port, a cold medium input port and a cold medium output port, and the refrigerant output port of the condenser is communicated with the input port of the dryer; the refrigerant input port is communicated with the compressor output port; the cold medium input port is communicated with the output port of the first flow regulating valve; the cold medium output port is communicated with the input port of the water chilling unit;
the evaporator comprises a refrigerant input port, a refrigerant output port, a heat medium input port and a heat medium output port, and the refrigerant output port of the evaporator is communicated with the compressor input port; the refrigerant input port is communicated with the main path output port of the throttle device test main path; the heat medium input port is communicated with the output port of the second flow regulating valve; the hot medium output port is communicated with the input port of the hot water unit;
a pressure transmitter is arranged at the refrigerant output port of the condenser; a pressure transmitter and a temperature sensor are arranged at the input port of the compressor; the evaporator is characterized in that a refrigerant input port of the evaporator is provided with a temperature sensor, a heat medium input port and a heat medium output port of the evaporator are respectively provided with a temperature sensor, a mass flowmeter is arranged in a refrigerant circulation loop, and a heat medium flowmeter is arranged in a heat medium circulation loop; a cooling medium flow meter is provided in the cooling medium circulation circuit.
2. The experimental bench for testing the performance comparison of the different throttling devices of the automobile air conditioner according to claim 1, wherein the compressor is a variable frequency compressor.
3. A laboratory bench for testing the performance of different throttling devices of an automobile air conditioner according to claim 1, wherein a pressure transmitter is provided at the refrigerant input port of the evaporator.
4. The experimental bench for testing the performance comparison of different throttling devices of an automobile air conditioner as claimed in claim 1, wherein a pressure transmitter is provided at the refrigerant input port of the condenser.
5. The experimental bench for testing the performance comparison of different throttling devices of the automobile air conditioner as claimed in claim 1, wherein a temperature sensor is arranged at the input port of the condenser.
6. The experimental bench for testing the performance comparison of different throttling devices of the automobile air conditioner as claimed in claim 1, wherein a temperature sensor is arranged at the output port of the condenser.
7. The experimental bench for testing the performance comparison of the different throttling devices of the automobile air conditioner as claimed in claim 1, wherein the cooling medium circulation loop is provided with a cooling medium flow meter.
8. The experimental bench for testing the performance of different throttling devices of the automobile air conditioner according to claim 1, wherein a liquid sight glass is further arranged in the refrigerant circulating loop.
9. The experimental bench for testing the performance of the different throttling devices of the automobile air conditioner according to any one of claims 1 to 8, wherein the hot water unit is a constant temperature hot water unit.
10. The experimental bench for testing the performance comparison of different throttling devices of the automobile air conditioner according to claim 9, wherein the constant-temperature water heater unit comprises: the constant-temperature water tank, the water pump communicated with the constant-temperature water tank, the electric heater and the temperature sensor are positioned in the constant-temperature water tank; the electric heater is used for heating water in the constant-temperature water tank; the temperature sensor is used for detecting the temperature of water in the constant-temperature water tank; the water pump is used for circulating water in the heat medium circulation loop; when the temperature value detected by the temperature sensor is smaller than a set threshold value, the electric heater is started to heat; when the temperature value detected by the temperature sensor is larger than the set threshold value, the electric heater stops heating.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115126689A (en) * | 2022-08-09 | 2022-09-30 | 辽宁工程技术大学 | Performance testing device for refrigeration compressor and using method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115126689A (en) * | 2022-08-09 | 2022-09-30 | 辽宁工程技术大学 | Performance testing device for refrigeration compressor and using method |
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