CN111562128A - Automobile heat pump air conditioner testing system and testing method thereof - Google Patents
Automobile heat pump air conditioner testing system and testing method thereof Download PDFInfo
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Abstract
The invention discloses an automobile heat pump air conditioner testing system and a testing method thereof, wherein the automobile heat pump air conditioner testing system comprises a rack, a compressor, an evaporator, an internal condenser and an outdoor heat exchanger, wherein the rack is provided with a passenger cabin and a condenser chamber, an air channel is arranged between the passenger cabin and the condenser chamber, the evaporator is arranged in the passenger cabin, the internal condenser is arranged in the condenser chamber, and the compressor and the outdoor heat exchanger are respectively arranged at corresponding positions of the rack; the high-pressure discharge port of the compressor is communicated with the inlet of the internal condenser, and the outlet of the internal condenser is communicated with the inlet of the outdoor heat exchanger through a first pipeline; the outlet of the outdoor heat exchanger is communicated with the low-pressure suction inlet of the compressor through a second pipeline and is also communicated with the inlet of the evaporator through a third pipeline; the outlet of the evaporator is communicated with the low-pressure suction inlet of the compressor. The test system can test the heating or refrigerating performance of the air conditioning system in the early stage of design and development of the automobile heat pump air conditioning system, and is convenient and trouble-saving.
Description
Technical Field
The invention relates to an automobile heat pump air conditioner testing system and a testing method thereof.
Background
Under the current situation of rapid development of new energy automobile industry, research on air conditioning systems and thermal management of new energy automobiles is also becoming urgent. Although the development of the new energy automobile air conditioner goes through several different technical stages, the heat pump type air conditioner will be the mainstream technology of the new energy automobile air conditioner in terms of the current technology and the development in the future.
In the practical development of new energy vehicles, because of numerous vehicle manufacturers in China and various vehicle types of new energy vehicles, although the heat pump air conditioners of the new energy vehicles of various vehicle types have the same principle, the specification sizes and the types of the heat pump air conditioners 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 and calculation logic of the heat pump air conditioners of the new energy vehicles. At present, the verification and the detection of the heat pump type air conditioner are generally carried out on a standard enthalpy difference test bed, relevant data are obtained through detection according to a standard method, then the design of the air conditioner is adjusted or modified according to the data, the whole process is long in period and high in cost, and the requirement on professional quality of personnel is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a test system for an automobile heat pump air conditioner, which can test the heating or cooling performance of the air conditioner system in the early stage of design and development of the automobile heat pump air conditioner system, and is convenient and trouble-saving.
In order to solve the technical problems, the technical scheme of the invention is as follows: an automobile heat pump air conditioner testing system comprises a rack, a compressor, an evaporator, an internal condenser and an outdoor heat exchanger; wherein,
the rack is provided with a passenger cabin and a condenser chamber, an air channel which is used for communicating the passenger cabin and the condenser chamber and can be blocked or opened is arranged between the passenger cabin and the condenser chamber, the evaporator is arranged in the passenger cabin, the internal condenser is arranged in the condenser chamber, and the compressor and the outdoor heat exchanger are respectively arranged at corresponding positions of the rack;
a high-pressure discharge port of the compressor is communicated with an inlet of the internal condenser, and an outlet of the internal condenser is communicated with an inlet of the outdoor heat exchanger through a first pipeline; the outlet of the outdoor heat exchanger is communicated with the low-pressure suction inlet of the compressor through a second pipeline and is also communicated with the inlet of the evaporator through a third pipeline; the outlet of the evaporator is communicated with the low-pressure suction inlet of the compressor;
the outlet of the compressor, the outlet of the evaporator, the outlet of the internal condenser and the outlet of the outdoor heat exchanger are respectively provided with a pressure temperature measuring device used for measuring pressure and temperature, the first pipeline is provided with a mass flow meter used for measuring flow, the second pipeline is provided with a first valve, and the third pipeline is provided with a second valve.
In order to refrigerate the battery, the automobile heat pump air-conditioning testing system further comprises a battery cooler, a third valve is arranged on a position, located behind the second valve, of the third pipeline, an inlet of the battery cooler is communicated with a position, located between the second valve and the third valve, of the third pipeline through a fourth pipeline, an outlet of the battery cooler is communicated with a low-pressure suction port of the compressor, and a fourth valve is arranged on the fourth pipeline.
Further, the first valve and the second valve are solenoid valves, and the third valve and the fourth valve are electronic expansion valves.
The second pipeline, the third pipeline and the battery cooler are respectively communicated with the low-pressure suction port of the compressor through the gas-liquid separator.
Further, the pressure and temperature measuring device is a pressure and temperature sensor.
Further to enhance the accuracy of the test, the compressor, the evaporator, the internal condenser, the outdoor heat exchanger, the first pipeline, the second pipeline, the third pipeline, the first valve, the second valve, the third valve, the fourth valve, the battery cooler and the gas-liquid separator are collectively referred to as parts;
the rack is built according to the real vehicle frame 1:1, and the positions of all parts on the rack are consistent with the positions of corresponding devices on the real vehicle frame.
The invention also provides a test method of the automobile heat pump air test system, which comprises the following steps:
respectively reading a flow value of a mass flowmeter and temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator, an internal condenser and an outdoor heat exchanger in a refrigeration mode, a dehumidification mode and a heating mode;
calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device in various modes according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device in various modes;
calculating the heating or refrigerating performance Q of each heat exchange device in various modes according to the corresponding enthalpy difference and flow value in various modes;
and comparing the heating or refrigerating performance Q with a corresponding target value to obtain a test result.
Further, the refrigeration mode comprises a single refrigeration mode, and the operation method of the automobile heat pump air test system in the single refrigeration mode comprises the following steps:
blocking the air duct, closing the first valve and opening the second valve;
the refrigerant discharged from the high-pressure discharge port of the compressor sequentially flows through the internal condenser, a pressure and temperature measuring device at the outlet of the internal condenser, a mass flow meter, the outdoor heat exchanger, a pressure and temperature measuring device at the outlet of the outdoor heat exchanger, a second valve, the evaporator and a pressure and temperature measuring device at the outlet of the evaporator, and finally returns to the compressor from the low-pressure suction port of the compressor; wherein,
the refrigerant carries out exothermic reaction in the outdoor heat exchanger and carries out endothermic reaction in the evaporator so as to achieve the purpose of cooling the passenger compartment;
and/or in a dehumidification mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, closing the first valve, and opening the second valve;
the refrigerant discharged from the high-pressure discharge port of the compressor sequentially flows through the internal condenser, a pressure and temperature measuring device at the outlet of the internal condenser, a mass flow meter, the outdoor heat exchanger, a pressure and temperature measuring device at the outlet of the outdoor heat exchanger, a second valve, the evaporator and a pressure and temperature measuring device at the outlet of the evaporator, and finally returns to the compressor from the low-pressure suction port of the compressor; wherein,
the refrigerant carries out exothermic reaction between the internal condenser and the outdoor heat exchanger, carries out endothermic reaction on the evaporator, and after the air in the passenger compartment exchanges heat with the refrigerant in the evaporator, the temperature drops, enters the condenser chamber through the air duct to be heated by the internal condenser, and then reenters the passenger compartment, and the water vapor is liquefied when meeting cold, thereby achieving the purpose of dehumidifying the passenger compartment;
and/or in the heating mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, opening the first valve and closing the second valve;
the refrigerant discharged from the high-pressure discharge port of the compressor sequentially flows through the internal condenser, the pressure and temperature measuring device at the outlet of the internal condenser, the mass flow meter, the outdoor heat exchanger, the pressure and temperature measuring device at the outlet of the outdoor heat exchanger and the first valve, and finally returns to the compressor from the low-pressure suction port of the compressor; wherein,
the refrigerant carries out exothermic reaction in the inside condenser, carries out endothermic reaction in outdoor heat exchanger, and the indoor air of condenser gets into passenger cabin through the wind channel after interior condenser heating to reach the purpose for passenger cabin heating.
Further, the refrigeration mode also comprises a double refrigeration mode, and the operation method of the automobile heat pump air conditioner test system in the double refrigeration mode comprises the following steps:
blocking the air duct, closing the first valve, and opening the second valve, the third valve and the fourth valve;
the refrigerant discharged from the high-pressure discharge port of the compressor sequentially passes through the internal condenser, a pressure and temperature measuring device at the outlet of the internal condenser, the mass flow meter, the outdoor heat exchanger, a pressure and temperature measuring device at the outlet of the outdoor heat exchanger and the second valve and then is divided into two paths, one path of refrigerant sequentially passes through the evaporator and the pressure and temperature measuring device at the outlet of the evaporator and then returns to the compressor from the low-pressure suction port of the compressor, and the other path of refrigerant sequentially passes through the fourth valve and the battery cooler and then returns to the compressor from the low-pressure suction port of the; wherein,
the refrigerant performs exothermic reaction in the outdoor heat exchanger and endothermic reaction in the evaporator and the battery cooler to refrigerate the passenger compartment and the battery.
After the technical scheme is adopted, according to the real vehicle 1:1, the automobile air conditioner test system is built according to the proportion of the pressure temperature difference, the enthalpy difference of a refrigerant at an inlet and an outlet of a heat exchanger is calculated according to the measured value of the pressure temperature, the heating or refrigerating performance of the system can be converted by combining the flow of the refrigerant, and the test system is convenient and quick; the automobile air conditioner test system can quickly verify whether the operation of each part is normal in the refrigeration mode, the dehumidification mode and the heating mode, whether the cooperation among the parts is smooth or not, an enthalpy difference table is not needed, the test speed is higher, the test process is simpler, the tests of single refrigeration performance, dehumidification performance, heating performance and double refrigeration performance are realized through the cooperation among different parts, and the development period and the investment of manpower, material resources and financial resources are greatly reduced.
Drawings
Fig. 1 is a schematic block diagram of an automotive heat pump air conditioner testing system of 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, an automobile heat pump air conditioner testing system comprises a rack, a compressor 1, an evaporator 2, an internal condenser 3 and an outdoor heat exchanger 4; wherein,
the rack is provided with a passenger cabin and a condenser chamber, an air channel which is used for communicating the passenger cabin and the condenser chamber and can be blocked or opened is arranged between the passenger cabin and the condenser chamber, the evaporator 2 is arranged in the passenger cabin, the internal condenser 3 is arranged in the condenser chamber, and the compressor 1 and the outdoor heat exchanger 4 are respectively arranged at corresponding positions of the rack;
a high-pressure discharge port of the compressor 1 is communicated with an inlet of the internal condenser 3, and an outlet of the internal condenser 3 is communicated with an inlet of the outdoor heat exchanger 4 through a first pipeline; an outlet of the outdoor heat exchanger 4 is communicated with a low-pressure suction inlet of the compressor 1 through a second pipeline and is also communicated with an inlet of the evaporator 2 through a third pipeline; the outlet of the evaporator 2 is communicated with the low-pressure suction inlet of the compressor 1;
the outlets of the compressor 1, the evaporator 2, the internal condenser 3 and the outdoor heat exchanger 4 are respectively provided with a pressure and temperature measuring device 5 for measuring pressure and temperature, the first pipeline is provided with a mass flow meter 6 for measuring flow, the second pipeline is provided with a first valve 81, and the third pipeline is provided with a second valve 82.
In the present embodiment, the compressor 1 is an electric compressor, and the pressure and temperature measuring device 5 is a pressure and temperature sensor, but is not limited thereto.
As shown in fig. 1, in order to cool the battery, the vehicle heat pump air conditioning test system further includes a battery cooler 7, a third valve 83 is installed on a third pipeline at a position behind the second valve 82, an inlet of the battery cooler 7 is communicated with a portion of the third pipeline between the second valve 82 and the third valve 83 through a fourth pipeline, an outlet of the battery cooler 7 is communicated with a low pressure suction port of the compressor 1, and a fourth valve 84 is installed on the fourth pipeline.
In the present embodiment, the first valve 81 and the second valve 82 are solenoid valves, and the third valve 83 and the fourth valve 84 are electronic expansion valves, but the present invention is not limited thereto.
As shown in fig. 1, the heat pump air conditioner testing system for the automobile further includes a gas-liquid separator 9 connected to a low-pressure suction port of the compressor 1, and the second pipeline, the third pipeline and the battery cooler 7 are respectively communicated with the low-pressure suction port of the compressor 1 through the gas-liquid separator 9.
In the present embodiment, in order to enhance the accuracy of the test, the compressor 1, the evaporator 2, the internal condenser 3, the outdoor heat exchanger 4, the first pipe, the second pipe, the third pipe, the first valve 81, the second valve 82, the third valve 83, the fourth valve 84, the battery cooler 7, and the gas-liquid separator 9 are collectively referred to as parts;
the rack is built according to the real vehicle frame 1:1, and the positions of all parts on the rack are consistent with the positions of corresponding devices on the real vehicle frame.
Example two
A method for testing an air testing system of an automotive heat pump according to an embodiment, the method comprising the steps of:
respectively reading a flow value of a mass flowmeter 6 and temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator 2, an internal condenser 3 and an outdoor heat exchanger 4 in a refrigeration mode, a dehumidification mode and a heating mode;
calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device in various modes according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device in various modes;
calculating the heating or refrigerating performance Q of each heat exchange device in various modes according to the corresponding enthalpy difference and flow value in various modes;
comparing the heating or refrigerating performance Q with a corresponding target value to obtain a test result; wherein,
heating or cooling performance Q = enthalpy difference of the refrigerant at the inlet and outlet of the heat exchanger element.
In the present embodiment, a pressure temperature measuring device 5 for measuring pressure and temperature may be installed at the inlet of each heat exchanging device; because the enthalpy is not changed in the throttling process, the temperature value and the pressure value measured by the pressure and temperature measuring device 5 at the outlet of the compressor 1 can be used as the temperature value and the pressure value of the inlet of the internal condenser 3, the temperature value and the pressure value measured by the pressure and temperature measuring device 5 at the outlet of the internal condenser 3 can be used as the temperature value and the pressure value of the inlet of the outdoor heat exchanger 4, and the temperature value and the pressure value measured by the pressure and temperature measuring device 5 at the outlet of the outdoor heat exchanger 4 can be used as the temperature value and the pressure value of the inlet of the evaporator 2.
Specifically, the cooling mode comprises a single cooling mode, and the operation method of the automobile heat pump air test system in the single cooling mode comprises the following steps:
blocking the air duct, closing the first valve 81, and opening the second valve 82;
the refrigerant discharged from the high-pressure discharge port of the compressor 1 passes through the internal condenser 3, the pressure and temperature measuring device 5 at the outlet of the internal condenser 3, the mass flow meter 6, the outdoor heat exchanger 4, the pressure and temperature measuring device 5 at the outlet of the outdoor heat exchanger 4, the second valve 82, the evaporator 2 and the pressure and temperature measuring device 5 at the outlet of the evaporator 2 in sequence, and finally returns to the compressor 1 from the low-pressure suction port of the compressor 1; wherein,
the refrigerant carries out exothermic reaction in the outdoor heat exchanger 4 and carries out endothermic reaction in the evaporator 2 so as to achieve the purpose of cooling the passenger compartment;
in the dehumidification mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, closing the first valve 81, and opening the second valve 82;
the refrigerant discharged from the high-pressure discharge port of the compressor 1 passes through the internal condenser 3, the pressure and temperature measuring device 5 at the outlet of the internal condenser 3, the mass flow meter 6, the outdoor heat exchanger 4, the pressure and temperature measuring device 5 at the outlet of the outdoor heat exchanger 4, the second valve 82, the evaporator 2 and the pressure and temperature measuring device 5 at the outlet of the evaporator 2 in sequence, and finally returns to the compressor 1 from the low-pressure suction port of the compressor 1; wherein,
the refrigerant carries out exothermic reaction between the internal condenser 3 and the outdoor heat exchanger 4, carries out endothermic reaction on the evaporator 2, and after the heat exchange between the air in the passenger compartment and the refrigerant in the evaporator 2, the temperature is reduced, the air enters the condenser chamber through the air duct to be heated by the internal condenser 3, and then reenters the passenger compartment, and the water vapor is liquefied when meeting cold, thereby achieving the purpose of dehumidifying the passenger compartment;
under the heating mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, opening the first valve 81, and closing the second valve 82;
the refrigerant discharged from the high-pressure discharge port of the compressor 1 passes through the internal condenser 3, the pressure and temperature measuring device 5 at the outlet of the internal condenser 3, the mass flow meter 6, the outdoor heat exchanger 4, the pressure and temperature measuring device 5 at the outlet of the outdoor heat exchanger 4 and the first valve 81 in sequence, and finally returns to the compressor 1 from the low-pressure suction port of the compressor 1; wherein,
the refrigerant carries out exothermic reaction in the internal condenser 3, carries out endothermic reaction in the outdoor heat exchanger 4, and the air in the condenser room enters the passenger compartment through the wind channel after being heated by the internal condenser 3 to achieve the purpose of heating the passenger compartment.
The refrigeration mode also comprises a double refrigeration mode, and the operation method of the automobile heat pump air conditioner test system in the double refrigeration mode comprises the following steps:
blocking the air duct, closing the first valve 81, and opening the second valve 82, the third valve 83, and the fourth valve 84;
the refrigerant discharged from the high-pressure discharge port of the compressor 1 sequentially passes through the internal condenser 3, the pressure and temperature measuring device 5 at the outlet of the internal condenser 3, the mass flow meter 6, the outdoor heat exchanger 4, the pressure and temperature measuring device 5 at the outlet of the outdoor heat exchanger 4 and the second valve 82 and then is divided into two paths, one path of refrigerant sequentially passes through the evaporator 2 and the pressure and temperature measuring device 5 at the outlet of the evaporator 2 and then returns to the compressor 1 from the low-pressure suction port of the compressor 1, and the other path of refrigerant sequentially passes through the fourth valve 84 and the battery cooler 7 and then returns to the compressor 1 from the low-pressure suction port of the compressor; wherein,
the refrigerant undergoes an exothermic reaction in the outdoor heat exchanger 4 and an endothermic reaction in the evaporator 2 and the battery cooler 7 to cool the passenger compartment and the battery.
The working principle of the invention is as follows:
according to the actual vehicle 1:1, the automobile air conditioner test system is built according to the proportion of the pressure temperature difference, the enthalpy difference of a refrigerant at an inlet and an outlet of a heat exchanger is calculated according to the measured value of the pressure temperature, the heating or refrigerating performance of the system can be converted by combining the flow of the refrigerant, and the test system is convenient and quick; the automobile air conditioner test system can quickly verify whether the operation of each part is normal in the refrigeration mode, the dehumidification mode and the heating mode, whether the cooperation among the parts is smooth or not, an enthalpy difference table is not needed, the test speed is higher, the test process is simpler, the tests of single refrigeration performance, dehumidification performance, heating performance and double refrigeration performance are realized through the cooperation among different parts, and the development period and the investment of manpower, material resources and financial resources are greatly reduced.
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 (9)
1. A test system for an automobile heat pump air conditioner is characterized in that,
the air conditioner comprises a rack, a compressor (1), an evaporator (2), an internal condenser (3) and an outdoor heat exchanger (4); wherein,
the rack is provided with a passenger cabin and a condenser chamber, an air channel which is used for communicating the passenger cabin and the condenser chamber and can be blocked or opened is arranged between the passenger cabin and the condenser chamber, an evaporator (2) is arranged in the passenger cabin, an internal condenser (3) is arranged in the condenser chamber, and a compressor (1) and an outdoor heat exchanger (4) are respectively arranged at corresponding positions of the rack;
a high-pressure discharge port of the compressor (1) is communicated with an inlet of the internal condenser (3), and an outlet of the internal condenser (3) is communicated with an inlet of the outdoor heat exchanger (4) through a first pipeline; an outlet of the outdoor heat exchanger (4) is communicated with a low-pressure suction inlet of the compressor (1) through a second pipeline and is also communicated with an inlet of the evaporator (2) through a third pipeline; the outlet of the evaporator (2) is communicated with the low-pressure suction inlet of the compressor (1);
the outlet of the compressor (1), the evaporator (2), the internal condenser (3) and the outdoor heat exchanger (4) is respectively provided with a pressure and temperature measuring device (5) for measuring pressure and temperature, the first pipeline is provided with a mass flow meter (6) for measuring flow, the second pipeline is provided with a first valve (81), and the third pipeline is provided with a second valve (82).
2. The automotive heat pump air conditioner testing system of claim 1,
the compressor further comprises a battery cooler (7), a third valve (83) is mounted at a position, behind the second valve (82), of the third pipeline, an inlet of the battery cooler (7) is communicated with a position, between the second valve (82) and the third valve (83), of the third pipeline through a fourth pipeline, an outlet of the battery cooler (7) is communicated with a low-pressure suction port of the compressor (1), and a fourth valve (84) is mounted on the fourth pipeline.
3. The automotive heat pump air conditioner testing system of claim 2,
the first valve (81) and the second valve (82) are solenoid valves, and the third valve (83) and the fourth valve (84) are electronic expansion valves.
4. The automotive heat pump air conditioner testing system of claim 2,
the air conditioner further comprises a gas-liquid separator (9) connected to a low-pressure suction inlet of the compressor (1), and the second pipeline, the third pipeline and the battery cooler (7) are communicated with the low-pressure suction inlet of the compressor (1) through the gas-liquid separator (9) respectively.
5. The automotive heat pump air conditioner testing system of claim 1,
the pressure and temperature measuring device (5) is a pressure and temperature sensor.
6. The automotive heat pump air conditioner testing system of claim 4,
the compressor (1), the evaporator (2), the internal condenser (3), the outdoor heat exchanger (4), the first pipeline, the second pipeline, the third pipeline, the first valve (81), the second valve (82), the third valve (83), the fourth valve (84), the battery cooler (7) and the gas-liquid separator (9) are collectively referred to as parts;
the rack is built according to the real vehicle frame 1:1, and the positions of all parts on the rack are consistent with the positions of corresponding devices on the real vehicle frame.
7. A test method of the automobile heat pump air test system according to any one of claims 1 to 6,
the method comprises the following steps:
respectively reading a flow value of a mass flowmeter (6) and temperature values and pressure values of inlets and outlets of three heat exchange devices, namely an evaporator (2), an internal condenser (3) and an outdoor heat exchanger (4), in a refrigeration mode, a dehumidification mode and a heating mode;
calculating the enthalpy difference of the refrigerant at the inlet and the outlet of each heat exchange device in various modes according to the temperature value and the pressure value of the inlet and the outlet of each heat exchange device in various modes;
calculating the heating or refrigerating performance Q of each heat exchange device in various modes according to the corresponding enthalpy difference and flow value in various modes;
and comparing the heating or refrigerating performance Q with a corresponding target value to obtain a test result.
8. The method for testing an automotive heat pump air test system according to claim 7,
the operation method of the automobile heat pump air test system comprises the following steps:
blocking the air duct, closing the first valve (81), and opening the second valve (82);
the refrigerant discharged from a high-pressure discharge port of the compressor (1) sequentially flows through an internal condenser (3), a pressure and temperature measuring device (5) at an outlet of the internal condenser (3), a mass flow meter (6), an outdoor heat exchanger (4), a pressure and temperature measuring device (5) at an outlet of the outdoor heat exchanger (4), a second valve (82), the evaporator (2) and the pressure and temperature measuring device (5) at an outlet of the evaporator (2), and finally returns to the compressor (1) from a low-pressure suction port of the compressor (1); wherein,
the refrigerant carries out exothermic reaction in the outdoor heat exchanger (4) and carries out endothermic reaction in the evaporator (2) so as to achieve the purpose of cooling the passenger compartment;
and/or in a dehumidification mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, closing the first valve (81), and opening the second valve (82);
the refrigerant discharged from a high-pressure discharge port of the compressor (1) sequentially flows through an internal condenser (3), a pressure and temperature measuring device (5) at an outlet of the internal condenser (3), a mass flow meter (6), an outdoor heat exchanger (4), a pressure and temperature measuring device (5) at an outlet of the outdoor heat exchanger (4), a second valve (82), the evaporator (2) and the pressure and temperature measuring device (5) at an outlet of the evaporator (2), and finally returns to the compressor (1) from a low-pressure suction port of the compressor (1); wherein,
the refrigerant carries out exothermic reaction between the internal condenser (3) and the outdoor heat exchanger (4), carries out endothermic reaction on the evaporator (2), and after the air in the passenger compartment exchanges heat with the refrigerant in the evaporator (2), the temperature is reduced, the air enters the condenser chamber through the air duct to be heated by the internal condenser (3) and then reenters the passenger compartment, and the water vapor is liquefied when meeting cold, so that the aim of dehumidifying the passenger compartment is fulfilled;
and/or in the heating mode, the operation method of the automobile heat pump air test system comprises the following steps:
opening the air duct, opening the first valve (81), and closing the second valve (82);
the refrigerant discharged from the high-pressure discharge port of the compressor (1) sequentially flows through the internal condenser (3), a pressure and temperature measuring device (5) at the outlet of the internal condenser (3), a mass flow meter (6), the outdoor heat exchanger (4), the pressure and temperature measuring device (5) at the outlet of the outdoor heat exchanger (4) and a first valve (81), and finally returns to the compressor (1) from the low-pressure suction port of the compressor (1); wherein,
the refrigerant carries out exothermic reaction in the internal condenser (3), carries out endothermic reaction in the outdoor heat exchanger (4), and the air in the condenser chamber enters the passenger compartment through the air duct after being heated by the internal condenser (3) to achieve the purpose of heating the passenger compartment.
9. The method for testing an automotive heat pump air test system according to claim 8,
the automobile heat pump air test system also comprises a battery cooler (7), a third valve (83) is arranged on a position, behind the second valve (82), of the third pipeline, the inlet of the battery cooler (7) is communicated with a part, between the second valve (82) and the third valve (83), of the third pipeline through a fourth pipeline, the outlet of the battery cooler (7) is communicated with a low-pressure suction inlet of the compressor (1), and a fourth valve (84) is arranged on the fourth pipeline;
the refrigeration mode also comprises a double refrigeration mode, and the operation method of the automobile heat pump air conditioner test system in the double refrigeration mode comprises the following steps:
blocking the air duct, closing the first valve (81), and opening the second valve (82), the third valve (83), and the fourth valve (84);
refrigerant discharged from a high-pressure discharge port of the compressor (1) sequentially flows through the internal condenser (3), a pressure and temperature measuring device (5) at an outlet of the internal condenser (3), a mass flow meter (6), the outdoor heat exchanger (4), a pressure and temperature measuring device (5) at an outlet of the outdoor heat exchanger (4) and a second valve (82) and then is divided into two paths, one path of refrigerant sequentially passes through the evaporator (2) and the pressure and temperature measuring device (5) at an outlet of the evaporator (2) and then returns to the compressor (1) from a low-pressure suction port of the compressor (1), and the other path of refrigerant sequentially passes through a fourth valve (84) and a battery cooler (7) and then returns to the compressor (1) from the low-pressure suction port of the compressor (1; wherein,
the refrigerant performs exothermic reaction in the outdoor heat exchanger (4), and performs endothermic reaction in the evaporator (2) and the battery cooler (7) to achieve the purpose of refrigerating the passenger compartment and the battery.
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