CN111579270B - Hybrid electric vehicle heat pump air conditioner testing system and testing method - Google Patents
Hybrid electric vehicle heat pump air conditioner testing system and testing method Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000002918 waste heat Substances 0.000 claims abstract description 4
- 238000010998 test method Methods 0.000 claims abstract 3
- 238000005057 refrigeration Methods 0.000 claims description 38
- 239000003507 refrigerant Substances 0.000 claims description 34
- 238000013461 design Methods 0.000 claims description 19
- 238000007791 dehumidification Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims 1
- 238000004378 air conditioning Methods 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 9
- 238000011161 development Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000011056 performance test Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Abstract
The invention discloses a test system and a test method for a heat pump air conditioner of a hybrid vehicle, wherein the test system for the heat pump air conditioner of the hybrid vehicle comprises a rack, a compressor, a condenser, a first flowmeter, a first expansion valve, an evaporator, a second expansion valve, a battery cooler, a water pump, a heater, a second flowmeter, a warm air core, an engine radiator, a heat generating device for generating heat to simulate the waste heat of the engine, a temperature and pressure measuring part and a temperature measuring device; the rack is internally provided with a passenger cabin, a warm air chamber and an air channel for communicating the passenger cabin with the warm air chamber, the evaporator is arranged in the passenger cabin, and the warm air core is arranged in the warm air chamber; the outlet of the compressor is connected with the inlet of the condenser; the outlet of the condenser is connected to the inlet of the first flow meter. The invention can rapidly test the refrigerating and heating performance of the heat pump air conditioning system of the hybrid electric vehicle in various modes, is convenient and rapid to operate, can shorten the test period and reduce the test cost.
Description
Technical Field
The invention relates to a hybrid electric vehicle heat pump air conditioner testing system and a testing method.
Background
At present, under the situation that new energy automobiles rapidly develop, research on an air conditioning system and a thermal management system of the new energy automobiles is also urgent, wherein a heat pump type air conditioner is a mainstream technology of the air conditioner of the new energy automobiles.
In the development of hybrid vehicles, various vehicle types of hybrid vehicles are produced due to numerous vehicle manufacturers in China, and the heat pump air conditioner principles of various vehicle types are basically consistent, but the specifications, the sizes and the types of the heat pump air conditioners are different, so that the heat pump air conditioner of the hybrid vehicles has great investment in the aspects of design, verification, adjustment and improvement, operation logic and the like. At present, the verification and detection of the heat pump type air conditioner in the hybrid electric vehicle are usually carried out on a standard enthalpy difference table test bed, related data are obtained through detection by a standard method, and then the design of the air conditioner is adjusted or modified according to the data. But the operations of verification, detection and test on the enthalpy difference table are complicated, the whole process is long in period and high in cost, and the requirements on the professional skills of operators are extremely high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a heat pump air conditioner test system for a hybrid electric vehicle, which can rapidly test the refrigerating and heating performances of the heat pump air conditioner system for the hybrid electric vehicle in various modes, is convenient and rapid to operate, can shorten the test period and can reduce the test cost.
In order to solve the technical problems, the technical scheme of the invention is as follows: the heat pump air conditioner test system of the hybrid electric vehicle comprises a rack, a compressor, a condenser, a first flowmeter, a first expansion valve, an evaporator, a second expansion valve, a battery cooler, a water pump, a heater, a second flowmeter, a warm air core, an engine radiator and a heat generating device for generating heat to simulate the waste heat of the engine; wherein,
The compressor, the condenser, the evaporator, the battery cooler, the water pump, the heater, the warm air core, the heat generating device and the engine radiator are all arranged on the bench;
the rack is internally provided with a passenger cabin, a warm air chamber and at least one air channel for communicating the passenger cabin with the warm air chamber, the evaporator is arranged in the passenger cabin, and the warm air core is arranged in the warm air chamber;
the outlet of the compressor is connected with the inlet of the condenser;
the outlet of the condenser is connected with the inlet of the first flowmeter;
The outlet of the first flowmeter is respectively connected with the inlet of the first expansion valve and the inlet of the second expansion valve;
The outlet of the first expansion valve is connected with the evaporator;
the outlet of the evaporator is connected with the inlet of the compressor;
the outlet of the second expansion valve is connected with the inlet of the battery cooler;
The outlet of the battery cooler is connected with the inlet of the compressor;
The outlet of the water pump is connected with the inlet of the heater;
the outlet of the heater is connected with the inlet of the second flowmeter;
the outlet of the second flowmeter is connected with the inlet of the warm air core body;
the outlet of the warm air core body is connected with the inlet of the heat generating device through a first pipeline;
The outlet of the heat generating device is connected with the inlet of the engine radiator;
the outlet of the engine radiator is connected with the inlet of the water pump;
A temperature and pressure measuring part for measuring the pressure and temperature of the refrigerant is respectively installed at the inlet of the compressor, the inlet of the condenser, the inlet of the first flowmeter, the inlet of the evaporator and the inlet of the battery cooler;
and temperature measuring devices for measuring the water flow temperature are respectively arranged at the outlet of the water pump, the outlet of the second flowmeter, the outlet of the warm air core body, the outlet of the heat generating device and the outlet of the engine radiator.
Further in order to supplement water source to the first pipeline, the heat pump air conditioner testing system of the hybrid electric vehicle further comprises a water kettle, and a water outlet of the water kettle is communicated with the first pipeline.
Further, the first and second flow meters are mass flow meters;
and/or the first expansion valve and the second expansion valve are electronic expansion valves;
and/or the heater is a high pressure coolant heater.
Further, the temperature and pressure measuring component is a pressure and temperature sensor;
and/or the temperature measuring device is a temperature sensor;
And/or the heat generating device is an electric heater.
Further to improve the accuracy of the test, the compressor, condenser, evaporator, battery cooler, water pump, heater, warm air core, heat generating device and engine radiator are located on the bench in a position consistent with that of the bench on a real vehicle.
The invention also provides a testing method of the hybrid electric vehicle heat pump air conditioner testing system, which comprises the following steps:
S1: the heat pump air conditioner test system of the hybrid vehicle is operated in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidifying mode, S2 is executed when the operation mode is the single refrigeration mode, S3 is executed when the operation mode is the double refrigeration mode, and S4 is executed when the operation mode is the heating mode;
S2: measuring a first flow value through the first flow meter, and respectively measuring the temperature value and the pressure value of an inlet and an outlet of two heat exchange devices, namely an evaporator and a condenser through the temperature and pressure measuring component; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
s3: measuring a first flow value through the first flow meter, and respectively measuring temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator, a condenser and a battery cooler through the temperature and pressure measuring component; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
S4: and measuring a second flow value through the second flow meter, measuring the water temperature difference of the inlet and the outlet of the warm air core through the temperature measuring device, converting the heating performance P according to the second flow value and the water temperature difference of the inlet and the outlet of the warm air core, and comparing the heating performance P with a design target value to obtain a test result.
Further, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the single cooling mode are as follows:
closing the air duct, opening the first expansion valve, closing the second expansion valve, and starting the compressor to enable the refrigerant in the compressor to flow through the condenser, the first flowmeter, the first expansion valve and the evaporator in sequence from the outlet of the compressor and then flow into the inlet of the compressor.
Further, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dual cooling mode are as follows:
Closing the air duct, opening the first expansion valve and the second expansion valve, starting the compressor to enable the refrigerant in the compressor to sequentially flow through the condenser and the first flowmeter from the outlet of the compressor, and then respectively flowing into the first expansion valve and the second expansion valve; the refrigerant in the first expansion valve flows through the evaporator and then flows into the compressor from the inlet of the compressor, and the refrigerant in the second expansion valve flows through the battery cooler and then flows into the compressor from the inlet of the compressor.
Further, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the heating mode are as follows:
And opening the air duct, and starting the water pump to enable water flow to flow from the outlet of the water pump to the inlet of the water pump after sequentially flowing through the heater, the second flowmeter, the warm air core, the heat generating device and the engine radiator.
Further, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dehumidification mode are as follows:
Opening the air duct, opening the first expansion valve, closing the second expansion valve, starting the compressor to enable refrigerant in the compressor to flow through the condenser, the first flowmeter, the first expansion valve and the evaporator in sequence from the outlet of the compressor and then flow into the inlet of the compressor, and starting the water pump to enable water flow to flow through the heater, the second flowmeter, the warm air core, the heat generating device and the engine radiator in sequence from the outlet of the water pump and then flow into the inlet of the water pump.
After the technical scheme is adopted, when the heat pump air conditioner testing system of the hybrid electric vehicle operates in a single refrigeration mode, a first flow value is measured through the first flow meter, and temperature values and pressure values of inlets and outlets of the two heat exchange devices, namely the evaporator and the condenser, are respectively measured through the temperature and pressure measuring component; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; and calculating the product of the enthalpy difference and the first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with the design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner test system operates in a double refrigeration mode, a first flow value is measured through the first flow meter, and temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator, a condenser and a battery cooler, are respectively measured through the temperature and pressure measuring component; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; and calculating the product of the enthalpy difference and the first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with the design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner test system operates in a heating mode, a second flow value is measured through the second flow meter, the water temperature difference of the inlet and the outlet of the warm air core body is measured through the temperature measuring device, the heating performance P is converted according to the second flow value and the water temperature difference of the inlet and the outlet of the warm air core body, and the heating performance P is compared with a design target value to obtain a test result. When the hybrid electric vehicle heat pump air conditioner test system operates in a dehumidification mode, the dehumidification performance is measured through the dehumidification effect. The device and the method realize rapid test of the refrigerating and heating performance of the heat pump air conditioning system of the hybrid electric vehicle in various modes, and verify whether the operation of each part is normal or not and whether the cooperation between each part is smooth or not. And need not to use enthalpy difference platform, test operation simple convenient and fast more, very big shortened test cycle, reduced test cost, can also reduce the requirement to operating personnel professional skill. In addition, the heat pump air conditioner test system of the hybrid electric vehicle can also perform refrigeration performance test, heating performance test, refrigerant path realizability, waterway realizability and the like on the air conditioner system in the early stage of design and development of the heat pump air conditioner of the hybrid electric vehicle, can predict the comprehensive performance of the air conditioner system, can rapidly realize the calibration of the controller of the whole air conditioner system of the hybrid electric vehicle and the development of a control strategy, and greatly reduces the development period and the investment of manpower, material resources and financial resources.
Drawings
Fig. 1 is a schematic block diagram of a hybrid vehicle heat pump air conditioner test system of the present invention.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1, a hybrid vehicle heat pump air conditioner test system includes a stage, a compressor 1, a condenser 2, a first flowmeter 3, a first expansion valve 4, an evaporator 5, a second expansion valve 6, a battery cooler 7, a water pump 8, a heater 9, a second flowmeter 10, a warm air core 11, an engine radiator 12, and a heat generation device 13 for generating heat to simulate engine waste heat; wherein,
The compressor 1, the condenser 2, the evaporator 5, the battery cooler 7, the water pump 8, the heater 9, the warm air core 11, the heat generating device 13 and the engine radiator 12 are all arranged on the rack;
The rack is internally provided with a passenger cabin, a warm air chamber and at least one air channel for communicating the passenger cabin with the warm air chamber, the evaporator 5 is arranged in the passenger cabin, and the warm air core 11 is arranged in the warm air chamber; specifically, an on-off valve for opening or closing the air duct can be arranged in the air duct;
The outlet of the compressor 1 is connected with the inlet of the condenser 2;
The outlet of the condenser 2 is connected to the inlet of the first flowmeter 3;
the outlet of the first flowmeter 3 is connected with the inlet of the first expansion valve 4 and the inlet of the second expansion valve 6 respectively;
the outlet of the first expansion valve 4 is connected with the evaporator 5;
the outlet of the evaporator 5 is connected with the inlet of the compressor 1;
the outlet of the second expansion valve 6 is connected with the inlet of the battery cooler 7;
the outlet of the battery cooler 7 is connected to the inlet of the compressor 1;
the outlet of the water pump 8 is connected with the inlet of the heater 9;
The outlet of the heater 9 is connected to the inlet of the second flowmeter 10;
the outlet of the second flowmeter 10 is connected with the inlet of the warm air core 11;
The outlet of the warm air core 11 is connected with the inlet of the heat generating device 13 through a first pipeline 14;
the outlet of the heat generating device 13 is connected to the inlet of the engine radiator 12;
The outlet of the engine radiator 12 is connected with the inlet of the water pump 8;
A temperature and pressure measuring part 15 for measuring the pressure and temperature of the refrigerant is installed at the inlet of the compressor 1, the inlet of the condenser 2, the inlet of the first flowmeter 3, the inlet of the evaporator 5, and the inlet of the battery cooler 7, respectively;
temperature measuring devices 16 for measuring water flow temperature are respectively arranged at the outlet of the water pump 8, the outlet of the second flowmeter 10, the outlet of the warm air core 11, the outlet of the heat generating device 13 and the outlet of the engine radiator 12; specifically, the english name of the battery cooler 7 is a chip; the battery cooler 7, the warm air core 11 and the engine radiator 12 are all well known to those skilled in the art, and are not described in detail in this embodiment.
As shown in fig. 1, the hybrid vehicle heat pump air conditioner testing system may further include a water kettle 17, a water outlet of the water kettle 17 is communicated with the first pipe 14, and the water kettle 17 is used for supplementing a water source into the first pipe 14.
In this embodiment, the first flowmeter 3 and the second flowmeter 10 may be mass flowmeters, the first expansion valve 4 and the second expansion valve 6 may be electronic expansion valves, the heater 9 may be a high-pressure coolant heater, the temperature-pressure measuring part 15 may be a pressure-temperature sensor, the temperature measuring device 16 may be a temperature sensor, and the heat generating device 13 may be an electric heater.
Further specifically, the positions of the compressor 1, the condenser 2, the evaporator 5, the battery cooler 7, the water pump 8, the heater 9, the warm air core 11, the heat generating device 13 and the engine radiator 12 on the rack are consistent with the positions of the rack on a real vehicle, and the rack can be according to the real vehicle model 1:1 is built.
Example two
As shown in fig. 1, a testing method of the hybrid vehicle heat pump air conditioner testing system according to embodiment one includes the following steps:
S1: the heat pump air conditioner test system of the hybrid vehicle is operated in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidifying mode, S2 is executed when the operation mode is the single refrigeration mode, S3 is executed when the operation mode is the double refrigeration mode, and S4 is executed when the operation mode is the heating mode;
s2: measuring a first flow value through the first flow meter 3, and measuring temperature values and pressure values of inlets and outlets of the two heat exchange devices, namely the evaporator 5 and the condenser 2, through the temperature and pressure measuring component 15; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
S3: measuring a first flow value through the first flow meter 3, and measuring temperature values and pressure values of inlets and outlets of three heat exchange devices, namely the evaporator 5, the condenser 2 and the battery cooler 7, through the temperature and pressure measuring component 15; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
S4: the second flow value is measured by the second flow meter 10, the water temperature difference of the inlet and the outlet of the warm air core 11 is measured by the temperature measuring device 16, the heating performance P is converted according to the second flow value and the water temperature difference of the inlet and the outlet of the warm air core 11, and the heating performance P is compared with a design target value to obtain a test result.
Specifically, in step S1, the specific steps for operating the hybrid vehicle heat pump air conditioner test system in the single cooling mode are as follows:
Closing the air duct, opening the first expansion valve 4, closing the second expansion valve 6, starting the compressor 1 to enable the refrigerant in the compressor 1 to flow from the outlet of the compressor 1 to the inlet of the compressor 1 after flowing through the condenser 2, the first flowmeter 3, the first expansion valve 4 and the evaporator 5 in sequence. The evaporator 5 is located in the passenger cabin, and after the air in the passenger cabin exchanges heat with the low-temperature refrigerant in the evaporator 5, the temperature of the air in the passenger cabin is reduced to achieve the refrigerating effect.
Specifically, in step S1, the specific steps for operating the hybrid vehicle heat pump air conditioner test system in the dual-cooling mode are as follows:
Closing the air duct, opening the first expansion valve 4 and the second expansion valve 6, starting the compressor 1 to enable the refrigerant in the compressor 1 to sequentially flow through the condenser 2 and the first flowmeter 3 from the outlet of the compressor 1, and then respectively flow into the first expansion valve 4 and the second expansion valve 6; the refrigerant in the first expansion valve 4 flows through the evaporator 5 from the inlet of the compressor 1 to the compressor 1, and the refrigerant in the second expansion valve 6 flows through the battery cooler 7 from the inlet of the compressor 1 to the compressor 1. After the air in the passenger cabin exchanges heat with the low-temperature refrigerant in the evaporator 5, the temperature of the air in the passenger cabin is reduced so as to achieve a refrigerating effect; the low-temperature refrigerant in the battery cooler 7 exchanges heat with the battery cooling water to reduce the temperature of the battery cooling water, so as to achieve the purpose of cooling the battery.
Specifically, in step S1, the specific steps for operating the hybrid vehicle heat pump air conditioner test system in the heating mode are as follows:
The air duct is opened, the water pump 8 is started to enable water flow to flow from the outlet of the water pump 8 to the inlet of the water pump 8 after sequentially flowing through the heater 9, the second flowmeter 10, the warm air core 11, the heat generating device 13 and the engine radiator 12. The air in the passenger cabin flows into the warm air chamber through the air duct, exchanges heat with the warm water flow in the warm air core 11, and then rises in temperature, and flows back into the passenger cabin to achieve the purpose of heating.
Specifically, in step S1, the specific steps for operating the hybrid vehicle heat pump air conditioner test system in the dehumidification mode are as follows:
Opening the air duct, opening the first expansion valve 4, closing the second expansion valve 6, starting the compressor 1 to enable the refrigerant in the compressor 1 to flow through the condenser 2, the first flowmeter 3, the first expansion valve 4 and the evaporator 5 in sequence from the outlet of the compressor 1 and then flow into the inlet of the compressor 1, and starting the water pump 8 to enable water flow to flow through the heater 9, the second flowmeter 10, the warm air core 11, the heat generating device 13 and the engine radiator 12 from the outlet of the water pump 8 in sequence and then flow into the inlet of the water pump 8. The temperature of the air in the passenger cabin is reduced after heat exchange with the low-temperature refrigerant in the evaporator 5, meanwhile, the water vapor in the air is liquefied when meeting cold, so that the humidity of the air is reduced, then the air flows into the warm air chamber through the air duct, exchanges heat with the water flow in the warm air core 11, then the temperature is increased to a proper temperature of a human body, and then the air flows back into the passenger cabin, thereby achieving the aim of dehumidification.
The working principle of the invention is as follows:
When the heat pump air conditioner test system of the hybrid electric vehicle operates in a single refrigeration mode, a first flow value is measured through the first flow meter 3, and temperature values and pressure values of inlets and outlets of two heat exchange devices, namely the evaporator 5 and the condenser 2, are respectively measured through the temperature and pressure measuring component 15; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; and calculating the product of the enthalpy difference and the first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with the design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner test system operates in a double refrigeration mode, a first flow value is measured through the first flow meter 3, and temperature values and pressure values of inlets and outlets of three heat exchange devices, namely the evaporator 5, the condenser 2 and the battery cooler 7, are respectively measured through the temperature and pressure measuring component 15; enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; and calculating the product of the enthalpy difference and the first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with the design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner test system operates in a heating mode, a second flow value is measured by the second flow meter 10, a water temperature difference of an inlet and an outlet of the warm air core 11 is measured by the temperature measuring device 16, a heating performance P is converted according to the second flow value and the water temperature difference of the inlet and the outlet of the warm air core 11, and the heating performance P is compared with a design target value to obtain a test result. When the hybrid electric vehicle heat pump air conditioner test system operates in a dehumidification mode, the dehumidification performance is measured through the dehumidification effect. The device and the method realize rapid test of the refrigerating and heating performance of the heat pump air conditioning system of the hybrid electric vehicle in various modes, and verify whether the operation of each part is normal or not and whether the cooperation between each part is smooth or not. And need not to use enthalpy difference platform, test operation simple convenient and fast more, very big shortened test cycle, reduced test cost, can also reduce the requirement to operating personnel professional skill. In addition, the heat pump air conditioner test system of the hybrid electric vehicle can also perform refrigeration performance test, heating performance test, refrigerant path realizability, waterway realizability and the like on the air conditioner system in the early stage of design and development of the heat pump air conditioner of the hybrid electric vehicle, can predict the comprehensive performance of the air conditioner system, can rapidly realize the calibration of the controller of the whole air conditioner system of the hybrid electric vehicle and the development of a control strategy, and greatly reduces the development period and the investment of manpower, material resources and financial resources.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
In the description of the present invention, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present invention, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.
Claims (10)
1. The heat pump air conditioner test system of the hybrid electric vehicle is characterized by comprising a rack, a compressor (1), a condenser (2), a first flowmeter (3), a first expansion valve (4), an evaporator (5), a second expansion valve (6), a battery cooler (7), a water pump (8), a heater (9), a second flowmeter (10), a warm air core (11), an engine radiator (12) and a heat generating device (13) for generating heat to simulate engine waste heat; wherein,
The compressor (1), the condenser (2), the evaporator (5), the battery cooler (7), the water pump (8), the heater (9), the warm air core (11), the heat generating device (13) and the engine radiator (12) are all arranged on the rack;
the rack is internally provided with a passenger cabin, a warm air chamber and at least one air channel for communicating the passenger cabin with the warm air chamber, the evaporator (5) is arranged in the passenger cabin, and the warm air core (11) is arranged in the warm air chamber;
the outlet of the compressor (1) is connected with the inlet of the condenser (2);
the outlet of the condenser (2) is connected with the inlet of the first flowmeter (3);
The outlet of the first flowmeter (3) is respectively connected with the inlet of the first expansion valve (4) and the inlet of the second expansion valve (6);
the outlet of the first expansion valve (4) is connected with the evaporator (5);
the outlet of the evaporator (5) is connected with the inlet of the compressor (1);
The outlet of the second expansion valve (6) is connected with the inlet of the battery cooler (7);
The outlet of the battery cooler (7) is connected with the inlet of the compressor (1);
The outlet of the water pump (8) is connected with the inlet of the heater (9);
the outlet of the heater (9) is connected with the inlet of the second flowmeter (10);
The outlet of the second flowmeter (10) is connected with the inlet of the warm air core body (11);
the outlet of the warm air core body (11) is connected with the inlet of the heat generating device (13) through a first pipeline (14);
the outlet of the heat generating device (13) is connected with the inlet of the engine radiator (12);
the outlet of the engine radiator (12) is connected with the inlet of the water pump (8);
Temperature and pressure measuring parts (15) for measuring the pressure and the temperature of the refrigerant are respectively arranged at the inlet of the compressor (1), the inlet of the condenser (2), the inlet of the first flowmeter (3), the inlet of the evaporator (5) and the inlet of the battery cooler (7);
Temperature measuring devices (16) for measuring water flow temperature are respectively arranged at the outlet of the water pump (8), the outlet of the second flowmeter (10), the outlet of the warm air core body (11), the outlet of the heat generating device (13) and the outlet of the engine radiator (12).
2. The hybrid vehicle heat pump air conditioner test system according to claim 1, further comprising a water kettle (17), wherein the water outlet of the water kettle (17) is in communication with the first pipe (14).
3. The hybrid vehicle heat pump air conditioner test system as defined in claim 1, wherein,
The first flowmeter (3) and the second flowmeter (10) are mass flowmeters;
And/or the first expansion valve (4) and the second expansion valve (6) are electronic expansion valves;
And/or the heater (9) is a high pressure coolant heater.
4. The hybrid vehicle heat pump air conditioner test system as defined in claim 1, wherein,
The temperature and pressure measuring component (15) is a pressure and temperature sensor;
And/or the temperature measuring device (16) is a temperature sensor;
And/or the heat generating device (13) is an electric heater.
5. The hybrid vehicle heat pump air conditioner test system according to claim 1, wherein the positions of the compressor (1), the condenser (2), the evaporator (5), the battery cooler (7), the water pump (8), the heater (9), the warm air core (11), the heat generating device (13) and the engine radiator (12) on the rack are consistent with the positions thereof on a real vehicle.
6. A test method of a hybrid vehicle heat pump air conditioner test system according to any one of claims 1 to 5, wherein the steps of the method comprise:
S1: the heat pump air conditioner test system of the hybrid vehicle is operated in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidifying mode, S2 is executed when the operation mode is the single refrigeration mode, S3 is executed when the operation mode is the double refrigeration mode, and S4 is executed when the operation mode is the heating mode;
S2: measuring a first flow value through the first flowmeter (3), and respectively measuring temperature values and pressure values of inlets and outlets of the two heat exchange devices, namely the evaporator (5) and the condenser (2), through the temperature and pressure measuring component (15); enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
S3: measuring a first flow value through the first flowmeter (3), and respectively measuring temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator (5), a condenser (2) and a battery cooler (7), through the temperature and pressure measuring component (15); enthalpy difference of refrigerant at the inlet and the outlet of each heat exchange device is calculated according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of enthalpy difference and first flow value of each heat exchange device to obtain the refrigeration performance Q of the heat exchange device, and comparing the refrigeration performance Q with a design target value to obtain a test result;
s4: and measuring a second flow value through the second flowmeter (10), measuring the water temperature difference of the inlet and the outlet of the warm air core (11) through the temperature measuring device (16), converting the heating performance P according to the second flow value and the water temperature difference of the inlet and the outlet of the warm air core (11), and comparing the heating performance P with a design target value to obtain a test result.
7. The method according to claim 6, wherein in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the single cooling mode are as follows:
Closing the air duct, opening the first expansion valve (4), closing the second expansion valve (6), starting the compressor (1) so that the refrigerant in the compressor (1) flows through the condenser (2), the first flowmeter (3), the first expansion valve (4) and the evaporator (5) in sequence from the outlet of the compressor (1) and then flows into the inlet of the compressor (1).
8. The method according to claim 6, wherein in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dual cooling mode are as follows:
Closing the air duct, opening the first expansion valve (4) and the second expansion valve (6), starting the compressor (1) to enable the refrigerant in the compressor (1) to sequentially flow through the condenser (2) and the first flowmeter (3) from the outlet of the compressor (1), and then respectively flowing into the first expansion valve (4) and the second expansion valve (6); the refrigerant in the first expansion valve (4) flows from the inlet of the compressor (1) to the compressor (1) after flowing through the evaporator (5), and the refrigerant in the second expansion valve (6) flows from the inlet of the compressor (1) to the compressor (1) after flowing through the battery cooler (7).
9. The test method according to claim 6, wherein in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the heating mode are as follows:
Opening the air duct, and starting the water pump (8) so that water flows from the outlet of the water pump (8) to the inlet of the water pump (8) after sequentially flowing through the heater (9), the second flowmeter (10), the warm air core (11), the heat generating device (13) and the engine radiator (12).
10. The method according to claim 6, wherein in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dehumidification mode are as follows:
Opening the air duct, opening the first expansion valve (4), closing the second expansion valve (6), starting the compressor (1) to enable the refrigerant in the compressor (1) to flow through the condenser (2), the first flowmeter (3), the first expansion valve (4) and the evaporator (5) in sequence, and then flow into the inlet of the compressor (1), and opening the water pump (8) to enable water flow to flow through the heater (9), the second flowmeter (10), the warm air core (11), the heat generating device (13) and the engine radiator (12) in sequence from the outlet of the water pump (8) and then flow into the inlet of the water pump (8).
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