CN111579270A - Hybrid vehicle heat pump air conditioner test system and test method - Google Patents
Hybrid vehicle heat pump air conditioner test system and test method Download PDFInfo
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- 238000005057 refrigeration Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
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- 239000002918 waste heat Substances 0.000 claims abstract description 4
- 239000003507 refrigerant Substances 0.000 claims description 34
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- 238000007791 dehumidification Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
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Abstract
The invention discloses a hybrid vehicle heat pump air conditioner test system and a test method, wherein the hybrid vehicle heat pump air conditioner test system 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 body, an engine radiator, a heat generating device for generating heat to simulate the waste heat of an engine, a temperature and pressure measuring component and a temperature measuring device; the rack is internally provided with a passenger cabin, a warm air chamber and an air duct 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 invention can rapidly test the refrigeration and heating performance of the hybrid vehicle heat pump air-conditioning system 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 vehicle heat pump air conditioner testing system and a testing method.
Background
At present, under the situation of rapid development of new energy vehicles, research on air conditioning systems and thermal management systems of new energy vehicles is also urgent, wherein heat pump type air conditioners are the mainstream technology of new energy vehicle air conditioners.
In the development of the hybrid electric vehicle, because of numerous automobile manufacturers in China, various types of hybrid electric vehicles also appear, although the heat pump air-conditioning principles of various types of vehicles are basically consistent, the specification sizes and the types of the various types of vehicles are different, and therefore, a large amount of investment in financial resources, material resources and manpower is generated in the aspects of design, verification, adjustment improvement, operation logic and the like of the heat pump air-conditioning of the hybrid electric vehicle. At present, verification and detection of a heat pump type air conditioner in a hybrid vehicle are generally carried out on a standard enthalpy difference test bed, relevant 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. However, the verification, detection and test operations on the enthalpy difference table are complicated, the whole process is long in period and high in cost, and the requirement on the professional skills of operators is extremely high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hybrid vehicle heat pump air conditioner testing system which can quickly test the refrigeration and heating performance of the hybrid vehicle heat pump air conditioner system in various modes, is convenient and quick to operate, can shorten the testing period and reduce the testing cost.
In order to solve the technical problems, the technical scheme of the invention is as follows: a heat pump air conditioner test system of a 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 body, an engine radiator and a heat generating device for generating heat to simulate the waste heat of an engine; wherein,
the compressor, the condenser, the evaporator, the battery cooler, the water pump, the heater, the warm air core body, the heat generating device and the engine radiator are all arranged on the rack;
the rack is internally provided with a passenger cabin, a warm air chamber and at least one air duct 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;
an outlet of the first flowmeter is respectively connected with an inlet of the first expansion valve and an inlet of the second expansion valve;
an outlet of the first expansion valve is connected with the evaporator;
the outlet of the evaporator is connected with the inlet of the compressor;
an outlet of the second expansion valve is connected with an 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;
the outlet of the warm air core 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;
temperature and pressure measuring parts for measuring the pressure and temperature of the refrigerant are 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;
temperature measuring devices for measuring the temperature of water flow 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 a water source into the first pipeline, the hybrid electric vehicle heat pump air conditioner testing system further comprises a water kettle, and a water outlet of the water kettle is communicated with the first pipeline.
Further, the first flow meter and the second flow meter 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 positions of 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 on the rack are consistent with the positions of 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 on the real vehicle.
The invention also provides a test method of the hybrid electric vehicle heat pump air conditioner test system, which comprises the following steps:
s1: the hybrid vehicle heat pump air conditioner testing system is enabled to operate in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidification 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, and measuring temperature values and pressure values of inlets and outlets of two heat exchange devices, namely an evaporator and a condenser, through the temperature and pressure measuring component respectively; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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, and 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 respectively; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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, measuring the water temperature difference of the inlet and the outlet of the warm air core body 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 body, 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:
and 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 into the inlet of the compressor after sequentially flowing through the condenser, the first flowmeter, the first expansion valve and the evaporator from the outlet 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 include:
closing the air duct, opening the first expansion valve and the second expansion valve, starting a compressor to enable refrigerant in the compressor to sequentially flow through the condenser and the first flow meter from an outlet of the compressor, and then respectively flow into the first expansion valve and the second expansion valve; refrigerant in the first expansion valve flows from the inlet of the compressor to the compressor after flowing through the evaporator, and refrigerant in the second expansion valve flows from the inlet of the compressor to the compressor after flowing through the battery cooler.
Further, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the heating mode are:
and opening the air duct, and starting the water pump to enable water flow to an 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 from an outlet of the water pump.
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 into the inlet of the compressor after flowing through the condenser, the first flowmeter, the first expansion valve and the evaporator in sequence from the outlet of the compressor, and starting the water pump to enable water flow to the inlet of the water pump after flowing through the heater, the second flowmeter, the warm air core body, the heat generating device and the engine radiator in sequence from the outlet of the water pump.
After the technical scheme is adopted, when the heat pump air conditioner testing system of the hybrid electric vehicle runs in a single refrigeration mode, a first flow value is measured through the first flowmeter, and temperature values and pressure values of inlets and outlets of two heat exchange devices, namely an evaporator and a condenser, are respectively measured through the temperature and pressure measuring component; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device 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 of each heat exchange device and the first flow value to obtain the refrigerating performance Q of the heat exchange device, and comparing the refrigerating performance Q with a design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner testing system operates in a double-refrigeration mode, a first flow value is measured through the first flowmeter, 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; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device 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 of each heat exchange device and the first flow value to obtain the refrigerating performance Q of the heat exchange device, and comparing the refrigerating performance Q with a design target value to obtain a test result.
When the heat pump air conditioner testing system of the hybrid electric vehicle operates in a heating mode, a second flow value is measured through the second flowmeter, the 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 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 vehicle heat pump air conditioner testing system operates in a dehumidification mode, the dehumidification performance is measured through the dehumidification effect. The heat pump air-conditioning system of the hybrid electric vehicle can be rapidly tested for refrigerating and heating performances under various modes, and whether the operation of each part is normal or not and whether the cooperation between the parts is smooth or not are verified. And an enthalpy difference table is not needed, the test operation is simpler, more convenient and faster, the test period is greatly shortened, the test cost is reduced, and the requirement on the professional skill of an operator can be reduced. In addition, the hybrid vehicle heat pump air conditioner testing system can also carry out refrigeration performance testing, heating performance testing, refrigerant path realizability, water path realizability and the like on the air conditioning system in the early stage of design and development of the hybrid vehicle heat pump air conditioner, can predict the comprehensive performance of the air conditioning system, can quickly realize calibration of the hybrid vehicle air conditioning system controller and development of a control strategy, and greatly reduces the development period and investment of manpower, material resources and financial resources.
Drawings
Fig. 1 is a schematic block diagram of a heat pump air conditioner testing system of a hybrid vehicle according to the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example one
As shown in fig. 1, a hybrid vehicle heat pump air conditioner testing system comprises 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 the waste heat of an engine; 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;
a passenger cabin, a warm air chamber and at least one air duct for communicating the passenger cabin with the warm air chamber are arranged in the rack, the evaporator 5 is arranged in the passenger cabin, and the warm air core 11 is arranged in the warm air chamber; specifically, the air duct may be provided with an on-off valve for opening or closing 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 with the inlet of the first flowmeter 3;
an outlet of the first flowmeter 3 is connected with an inlet of the first expansion valve 4 and an 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 to 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 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;
temperature and pressure measuring parts 15 for measuring the pressure and temperature of the refrigerant are installed at the inlet of the compressor 1, the inlet of the condenser 2, the inlet of the first flow meter 3, the inlet of the evaporator 5, and the inlet of the battery cooler 7, respectively;
As shown in fig. 1, the heat pump air conditioning test system of the hybrid electric vehicle may further include a water bottle 17, a water outlet of the water bottle 17 is communicated with the first pipeline 14, and the water bottle 17 is used for supplementing a water source into the first pipeline 14.
In this embodiment, the first flowmeter 3 and the second flowmeter 10 may be mass flow meters, 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 and pressure measuring unit 15 may be a pressure and temperature sensor, the temperature measuring device 16 may be a temperature sensor, and the heat generating device 13 may be an electric heater.
More 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 heater core 11, the heat generating device 13, and the engine radiator 12 on the rack may be identical to the positions thereof on the real vehicle, and the rack may be configured in accordance with the real vehicle model 1: 1, building.
Example two
As shown in fig. 1, a method for testing a heat pump air conditioner testing system of a hybrid vehicle according to the first embodiment includes the following steps:
s1: the hybrid vehicle heat pump air conditioner testing system is enabled to operate in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidification 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: a first flow value is measured through the first flowmeter 3, and temperature values and pressure values of inlets and outlets of the evaporator 5 and the condenser 2 are respectively measured through the temperature and pressure measuring component 15; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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: a first flow value is measured through the first flow meter 3, and temperature values and pressure values of inlets and outlets of the evaporator 5, the condenser 2 and the battery cooler 7 are respectively measured through the temperature and pressure measuring component 15; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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 body 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 body 11, and comparing the heating performance P with a design target value to obtain a test result.
Specifically, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the single cooling mode include:
and closing the air duct, opening the first expansion valve 4, closing the second expansion valve 6, and starting the compressor 1 so that the refrigerant in the compressor 1 flows into the inlet of the compressor 1 after sequentially flowing through the condenser 2, the first flowmeter 3, the first expansion valve 4 and the evaporator 5 from the outlet of the compressor 1. The evaporator 5 is located in the passenger compartment, and after heat exchange is carried out between air in the passenger compartment and low-temperature refrigerant in the evaporator 5, the temperature of the air in the passenger compartment is reduced to achieve a refrigeration effect.
Specifically, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dual cooling mode include:
closing the air duct, opening the first expansion valve 4 and the second expansion valve 6, starting the compressor 1 so that the refrigerant in the compressor 1 flows from the outlet of the compressor 1 through the condenser 2 and the first flow meter 3 in sequence, and then flows into the first expansion valve 4 and the second expansion valve 6 respectively; the refrigerant in the first expansion valve 4 flows from the inlet of the compressor 1 to the compressor 1 after passing 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 passing through the battery cooler 7. After the air in the passenger compartment exchanges heat with the low-temperature refrigerant in the evaporator 5, the temperature of the air in the passenger compartment is reduced to achieve the refrigeration 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, and further the purpose of cooling the battery is achieved.
Specifically, 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 8 to enable water 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. Air in the passenger compartment flows into the warm air chamber through the air duct, exchanges heat with high-temperature water flow in the warm air core 11, then the temperature is raised, and then the air flows back to the passenger compartment to achieve the purpose of heating.
Specifically, in step S1, the specific steps of operating the hybrid vehicle heat pump air conditioner test system in the dehumidification mode include:
the air duct is opened, the first expansion valve 4 is opened, the second expansion valve 6 is closed, the compressor 1 is started so that the refrigerant in the compressor 1 flows into the inlet of the compressor 1 after sequentially flowing through the condenser 2, the first flowmeter 3, the first expansion valve 4 and the evaporator 5 from the outlet of the compressor 1, and the water pump 8 is started so that water flows 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 from the outlet of the water pump 8. The temperature of the air in the passenger compartment is reduced after heat exchange with the low-temperature refrigerant in the evaporator 5, meanwhile, 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, the temperature of the air is increased to the proper temperature of a human body after heat exchange with water flow in the warm air core body 11, and then the air flows back to the passenger compartment, so that the purpose of dehumidification is achieved.
The working principle of the invention is as follows:
when the hybrid electric vehicle heat pump air conditioner testing system operates in a single refrigeration mode, a first flow value is measured through the first flowmeter 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; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device 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 of each heat exchange device and the first flow value to obtain the refrigerating performance Q of the heat exchange device, and comparing the refrigerating performance Q with a design target value to obtain a test result.
When the hybrid electric vehicle heat pump air conditioner testing 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; calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device 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 of each heat exchange device and the first flow value to obtain the refrigerating performance Q of the heat exchange device, and comparing the refrigerating performance Q with a design target value to obtain a test result.
When the heat pump air conditioner test system of the hybrid electric vehicle operates in a heating mode, a second flow value is measured through the second flowmeter 10, the water temperature difference of the inlet and the outlet of the warm air core body 11 is measured through 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 body 11, and the heating performance P is compared with a design target value to obtain a test result. When the hybrid vehicle heat pump air conditioner testing system operates in a dehumidification mode, the dehumidification performance is measured through the dehumidification effect. The heat pump air-conditioning system of the hybrid electric vehicle can be rapidly tested for refrigerating and heating performances under various modes, and whether the operation of each part is normal or not and whether the cooperation between the parts is smooth or not are verified. And an enthalpy difference table is not needed, the test operation is simpler, more convenient and faster, the test period is greatly shortened, the test cost is reduced, and the requirement on the professional skill of an operator can be reduced. In addition, the hybrid vehicle heat pump air conditioner testing system can also carry out refrigeration performance testing, heating performance testing, refrigerant path realizability, water path realizability and the like on the air conditioning system in the early stage of design and development of the hybrid vehicle heat pump air conditioner, can predict the comprehensive performance of the air conditioning system, can quickly realize calibration of the hybrid vehicle air conditioning system controller and development of a control strategy, and greatly reduces the development period and investment of manpower, material resources and financial resources.
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the 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 otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. A heat pump air conditioner test system of a 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 body (11), an engine radiator (12) and a heat generating device (13) for generating heat to simulate the waste heat of an engine; 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 body (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 duct 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);
an outlet of the first flowmeter (3) is respectively connected with an inlet of the first expansion valve (4) and an 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 (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 temperature of the refrigerant are respectively installed at the inlet of the compressor (1), the inlet of the condenser (2), the inlet of the first flow meter (3), the inlet of the evaporator (5) and the inlet of the battery cooler (7);
temperature measuring devices (16) for measuring water flow temperatures 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 heat pump air conditioner test system of the hybrid electric vehicle as claimed in claim 1, further comprising a kettle (17), wherein a water outlet of the kettle (17) is in communication with the first pipe (14).
3. The hybrid vehicle heat pump air conditioner testing system of claim 1,
the first flow meter (3) and the second flow meter (10) are mass flow meters;
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 testing system of claim 1,
the warm-pressure measuring component (15) is a pressure-temperature sensor;
and/or the temperature measuring device (16) is a temperature sensor;
and/or the heat generating means (13) is an electric heater.
5. The heat pump air-conditioning test system for hybrid electric vehicle 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 bench are consistent with the positions thereof on the real vehicle.
6. A test method of the heat pump air conditioner test system of the hybrid electric vehicle as claimed in any one of claims 1 to 5, characterized in that the method comprises the following steps:
s1: the hybrid vehicle heat pump air conditioner testing system is enabled to operate in a single refrigeration mode or a double refrigeration mode or a heating mode or a dehumidification 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: 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); calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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: 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 an evaporator (5), a condenser (2) and a battery cooler (7), are respectively measured through the temperature and pressure measuring component (15); calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device; calculating the product of the enthalpy difference of each heat exchange device and the first flow value 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 body (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 body (11), and comparing the heating performance P with a design target value to obtain a test result.
7. 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 single cooling mode are as follows:
and closing the air duct, opening the first expansion valve (4), closing the second expansion valve (6), and starting the compressor (1) to enable the refrigerant in the compressor (1) to flow into the inlet of the compressor (1) after sequentially flowing through the condenser (2), the first flowmeter (3), the first expansion valve (4) and the evaporator (5) from the outlet of the compressor (1).
8. 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 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 from the inlet of the compressor (1) into 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) into the compressor (1) after flowing through the battery cooler (7).
9. The test method according to claim 6, wherein in step S1, the concrete steps of operating the hybrid vehicle heat pump air conditioner test system in the heating mode are as follows:
and opening the air channel, and starting the water pump (8) to enable water flow to an inlet of the water pump (8) after sequentially flowing through the heater (9), the second flowmeter (10), the warm air core body (11), the heat generating device (13) and the engine radiator (12) from an outlet of the water pump (8).
10. The test method according to claim 6, wherein in step S1, the concrete steps of operating the hybrid vehicle heat pump air conditioner test system in the dehumidification mode are as follows:
open the wind channel, open first expansion valve (4), close second expansion valve (6), start compressor (1) so that the refrigerant in compressor (1) is followed the export of compressor (1) flows through in proper order flow into behind condenser (2), first flowmeter (3), first expansion valve (4) and evaporimeter (5) the entry of compressor (1), open water pump (8) are so that rivers follow the export of water pump (8) flows through in proper order flow through behind heater (9), second flowmeter (10), warm braw core (11), heat production device (13) and the engine radiator (12) extremely the entry of water pump (8).
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