CN110254157B - Control method of heat pump air conditioning system for automobile - Google Patents

Control method of heat pump air conditioning system for automobile Download PDF

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Publication number
CN110254157B
CN110254157B CN201810200574.1A CN201810200574A CN110254157B CN 110254157 B CN110254157 B CN 110254157B CN 201810200574 A CN201810200574 A CN 201810200574A CN 110254157 B CN110254157 B CN 110254157B
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Prior art keywords
valve
compressor
instruction
mode
air conditioner
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CN110254157A (en
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龚智方
牛凤仙
王天英
尹晓燕
杜江
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
    • B60H1/00792—Arrangement of detectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a control method of a heat pump air conditioning system for an automobile, which enables the actuation time of each electromagnetic valve to be mutually spaced, and avoids the risk of noise superposition caused by the simultaneous actuation of a plurality of electromagnetic valves; when the electromagnetic valve is opened, the front-back pressure difference is smaller than the valve opening pressure value, the risk of generating pneumatic noise when the front-back pressure difference is larger is avoided, and the valve opening noise of the electromagnetic valve is reduced; the actions of starting, reducing the rotating speed, stopping and recovering the rotating speed of the compressor are mutually separated from the action time of the electromagnetic valve, so that the running noise of the compressor is reduced; the actuation frequency of each electromagnetic valve and the actuation frequency of the electronic expansion valve are reduced, and the actuation noise of the electromagnetic valves and the actuation noise of the electronic expansion valves are reduced; when the noise of the compressor is easy to identify in a sensitive working condition, the rotating speed is reduced to low speed or medium speed, and the running noise of the compressor is reduced. The control method disclosed by the invention effectively improves the NVH performance of the heat pump air-conditioning system of the automobile, thereby improving the NVH performance of the whole automobile.

Description

Control method of heat pump air conditioning system for automobile
Technical Field
The invention relates to the technical field of automobile heat pump air-conditioning systems, in particular to a control method of an automobile heat pump air-conditioning system.
Background
At present, the requirements of users on the NVH (Noise, vibration and Harshness) performance of the whole vehicle are continuously improved.
For a fuel automobile, the NVH performance of an engine of the fuel automobile has a large influence on the NVH performance of the whole automobile, so that the NVH performance of the whole automobile is improved mainly through the improvement of the performance of the engine of the fuel automobile.
For an electric vehicle, an air conditioning system of the electric vehicle mostly adopts a heat pump air conditioning system, please refer to fig. 1-5, fig. 1 is a schematic diagram of a typical heat pump air conditioning system adopted by the electric vehicle; FIG. 2 is a schematic diagram of the flow path of the medium in the cooling mode of the heat pump air conditioning system of FIG. 1; FIG. 3 is a schematic diagram of a medium flow path of the heat pump air conditioning system shown in FIG. 1 in a cooling and dehumidification mode; FIG. 4 is a schematic diagram of the medium flow path of the heat pump air conditioning system shown in FIG. 1 in a heating mode; fig. 5 is a schematic diagram of a medium flow path of the heat pump air conditioning system shown in fig. 1 in a heating and dehumidifying mode.
As shown in fig. 1, the heat pump air conditioning system includes a controller (not shown), a blower 1, an interior evaporator 2, an interior condenser 3, an exterior heat exchanger 4, a compressor 5, a gas-liquid separator 6, a plurality of pressure sensors 7, a plurality of temperature sensors 8, an electronic expansion valve 04, and a plurality of solenoid valves. Wherein the solenoid valve specifically includes: refrigerating valve 01, heating valve 02, dehumidifying valve 03 and bypass valve 05.
As shown in fig. 2 to 5, when the heat pump air conditioning system operates, the compressor 05 is turned on, and different air conditioning modes, such as a cooling mode, a heating mode, a cooling and dehumidifying mode, a heating and dehumidifying mode, and the like, are obtained by turning on different solenoid valves and adjusting the electronic expansion valve 04 to different opening degrees.
As shown in fig. 2, in the cooling mode, the electronic expansion valve 04 is in the maximum opening state, the bypass valve 05 is opened, the dehumidification valve 03 is closed, the cooling valve 01 is opened, and the heating valve 02 is closed.
As shown in fig. 3, in the cooling and dehumidification mode, the electronic expansion valve 04 is in the medium-opening state, the bypass valve 05 is closed, the dehumidification valve 03 is closed, the cooling valve 01 is opened, and the heating valve 02 is closed.
As shown in fig. 4, in the heating mode, the electronic expansion valve 04 is in a small opening state, the bypass valve 05 is closed, the dehumidification valve 03 is closed, the refrigeration valve 01 is closed, and the heating valve 02 is opened.
As shown in fig. 5, in the heating and dehumidifying mode, the electronic expansion valve 04 is in a small opening state, the bypass valve 05 is opened, the dehumidifying valve 03 is opened, the cooling valve 01 is closed or opened, and the heating valve 02 is opened.
Therefore, in the processes of mode switching, starting and stopping of the heat pump air conditioning system, all the electromagnetic valves, the electronic expansion valves and the like act to some extent and generate action noise. For an electric automobile, under the condition of no engine, action noise generated by a heat pump air conditioning system is an important factor influencing the NVH performance of the whole automobile.
Therefore, the NVH performance of the entire vehicle can be improved by improving the performance of the heat pump air conditioning system, and no effective means is provided in the prior art for improving the NVH performance of the entire vehicle by improving the performance of the heat pump air conditioning system.
Disclosure of Invention
The invention aims to provide a control method of an automobile heat pump air-conditioning system, which is used for improving the performance of the automobile heat pump air-conditioning system so as to improve the NVH performance of the whole automobile.
Therefore, the invention provides a control method of an automobile heat pump air-conditioning system, the automobile heat pump air-conditioning system comprises a controller, a compressor, an electronic expansion valve, a plurality of pressure sensors, a plurality of temperature sensors and a plurality of electromagnetic valves, and different air-conditioning modes are obtained by opening different electromagnetic valves and adjusting the electronic expansion valve to different opening degrees; the control method comprises the following steps:
s11, the controller receives a control instruction and judges a required air conditioner mode;
the control instruction comprises an air conditioner starting instruction, an air conditioner closing instruction and an air conditioner mode switching instruction; executing S12 after S11 when the controller receives an air conditioner starting instruction, an air conditioner closing instruction or an air conditioner mode switching instruction;
s12, the controller sends corresponding opening degree adjusting instructions to the electronic expansion valve according to adjusting requirements and sends corresponding actuating instructions to the electromagnetic valves needing to be actuated in sequence, so that the actuating time of each electromagnetic valve is spaced; wherein, the actuating instruction is an opening valve actuating instruction or a closing valve actuating instruction.
Optionally, a valve opening pressure value is preset in the controller; in step S12: and in the process of sending a valve opening actuation instruction to the electromagnetic valve to be opened, calculating the front-back pressure difference of the electromagnetic valve to be opened according to the detection results of the pressure sensor and the temperature sensor, and sending the valve opening actuation instruction to the corresponding electromagnetic valve when judging that the front-back pressure difference is smaller than the valve opening pressure value.
Alternatively, when the controller receives an air conditioner turn-off command, S11a is executed after S11, and S12 is executed at intervals after S11 a;
and S11a, the controller sends a compressor stop instruction to the compressor.
Alternatively, when the controller receives an air conditioner start instruction, S12a is executed at a certain time interval after S12;
and S12a, the controller sends a compressor starting instruction to the compressor.
Alternatively, when the controller receives the air-conditioning mode switching instruction, S11b is executed after S11, S12 is executed at a certain interval after S11b, and S12b is executed at a certain interval after S12;
s11b, the controller sends a compressor stop instruction or a compressor rotating speed reduction instruction to the compressor;
and S12b, the controller sends a compressor starting instruction or a compressor rotating speed recovery instruction to the compressor.
Optionally, the control instruction further includes an air conditioner pause instruction and an air conditioner resume instruction; when the controller receives the air conditioner pause command, executing S21a after S11; when the controller receives the air conditioner recovery command, S21b is executed after S11;
s21a, the controller sends a compressor stop instruction to the compressor;
and S21b, the controller sends a compressor starting instruction to the compressor.
Optionally, the opening and closing state of each solenoid valve when not energized is the opening and closing state corresponding to the cooling mode or the heating mode, and the opening degree of the electronic expansion valve when not energized is the opening degree corresponding to the cooling mode or the heating mode.
Optionally, each electromagnetic valve comprises a refrigeration valve which is opened in a refrigeration mode and a refrigeration dehumidification mode, a heating valve which is opened in a heating mode and a heating dehumidification mode, a dehumidification valve which is opened in a heating dehumidification mode, and a bypass valve which is arranged in parallel with the electronic expansion valve; the refrigeration valve and the bypass valve are in an open state when not electrified, and the electronic expansion valve is in a maximum opening state when not electrified; the heating valve and the dehumidification valve are in a closed state when not powered.
Optionally, a voltage comparison value or a PWM duty ratio comparison value is preset in the controller; the control method further comprises the following steps:
and S3a, when the controller judges that the voltage value of the air blower is smaller than the voltage comparison value or the PWM duty ratio of the air blower is smaller than the PWM duty ratio comparison value, the controller sends a speed limit instruction to the compressor.
Optionally, a vehicle speed comparison value is preset in the controller; the control method further comprises the following steps:
and S3b, when the controller judges that the vehicle speed is less than the vehicle speed comparison value or the vehicle is in an idle state, sending a speed limit instruction to the compressor.
The control method of the heat pump air conditioning system for the automobile has the following effects:
the actuation time of each electromagnetic valve is mutually separated, so that the risk of noise superposition caused by simultaneous actuation of a plurality of electromagnetic valves is avoided;
when the electromagnetic valve is opened, the front-back pressure difference is smaller than the valve opening pressure value, so that the risk of generating pneumatic noise when the front-back pressure difference is larger is avoided, and the valve opening noise of the electromagnetic valve is reduced;
the actions of starting, reducing the rotating speed, stopping and recovering the rotating speed of the compressor are mutually separated from the action time of the electromagnetic valve, so that the running noise of the compressor is in a normal level;
the actuation frequency of the electromagnetic valve and the actuation frequency of the electronic expansion valve are reduced, so that the actuation noise of the electromagnetic valve and the actuation noise of the electronic expansion valve are reduced;
when the noise of the compressor is easy to identify in a sensitive working condition, the rotating speed is reduced to low speed or medium speed, so that the running noise of the compressor is reduced.
Drawings
FIG. 1 is a schematic diagram of a typical heat pump air conditioning system employed in an electric vehicle;
FIG. 2 is a schematic diagram of the flow path of the medium in the cooling mode of the heat pump air conditioning system of FIG. 1;
FIG. 3 is a schematic diagram of a medium flow path of the heat pump air conditioning system shown in FIG. 1 in a cooling and dehumidification mode;
FIG. 4 is a schematic diagram of the medium flow path of the heat pump air conditioning system shown in FIG. 1 in a heating mode;
fig. 5 is a schematic diagram of a medium flow path of the heat pump air conditioning system shown in fig. 1 in a heating and dehumidifying mode.
The reference numerals in fig. 1-5 are illustrated as follows:
the system comprises a blower 1, an internal evaporator 2, an internal condenser 3, an external heat exchanger 4, a compressor 5, a gas-liquid separator 6, a temperature sensor 7, a pressure sensor 8, a refrigeration valve 01, a heating valve 02, a dehumidification valve 03, an electronic expansion valve 04 and a bypass valve 05.
FIG. 6 is a schematic control flow chart when the controller receives an air-conditioning mode switching command;
FIG. 7 is a schematic control flow chart of the controller receiving an air conditioner start command;
FIG. 8 is a schematic control flow chart of the controller receiving an air conditioner shutdown command;
FIG. 9 is a schematic control flow chart of the controller receiving a pause command from the air conditioner;
FIG. 10 is a schematic control flow chart of the controller receiving an air conditioner recovery command;
fig. 11a is a schematic control flow chart illustrating a switching operation from the heating mode to the heating and dehumidifying mode of the heat pump air conditioning system shown in fig. 1;
fig. 11b is a schematic control flow chart illustrating the switching from the heating mode to the cooling and dehumidifying mode of the heat pump air conditioning system shown in fig. 1;
fig. 11c is a schematic control flow chart illustrating the switching from the heating mode to the cooling mode of the heat pump air conditioning system shown in fig. 1;
fig. 11d is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 when the heating and dehumidifying mode is switched to the heating mode;
fig. 11e is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 switching from the heating dehumidification mode to the cooling dehumidification mode;
fig. 11f is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 when the heating and dehumidifying mode is switched to the cooling mode;
FIG. 11g is a schematic control flow chart illustrating the heat pump air conditioning system shown in FIG. 1 switching from a cooling and dehumidifying mode to a heating mode;
FIG. 11h is a schematic control flow chart illustrating the heat pump air conditioning system shown in FIG. 1 switching from the cooling dehumidification mode to the heating dehumidification mode;
FIG. 11i is a schematic control flow chart illustrating the heat pump air conditioning system of FIG. 1 switching from a cooling dehumidification mode to a cooling dehumidification mode;
fig. 11j is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 switching from the cooling mode to the heating mode;
FIG. 11k is a schematic control flow chart illustrating the heat pump air conditioning system of FIG. 1 switching from a cooling mode to a heating and dehumidifying mode;
fig. 11m is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 switching from the cooling mode to the cooling and dehumidifying mode.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 6 to 10, fig. 6 is a schematic control flow chart of the controller receiving an air-conditioning mode switching command; FIG. 7 is a schematic control flow chart of the controller receiving an air conditioner start command; FIG. 8 is a schematic control flow chart of the controller receiving an air conditioner turn-off command; FIG. 9 is a schematic control flow chart of the controller receiving a pause command from the air conditioner; fig. 10 is a control flow diagram when the controller receives an air conditioner recovery command.
The automobile heat pump air conditioning system comprises a controller, a compressor, a pressure sensor, a temperature sensor, an electronic expansion valve and a plurality of electromagnetic valves. The automobile heat pump air conditioning system has a plurality of modes such as a refrigeration mode, a refrigeration dehumidification mode, a heating dehumidification mode and the like. The solenoid valve specifically includes: the system comprises a refrigeration valve, a heating valve, a dehumidification valve and a bypass valve, wherein the refrigeration valve is opened in a refrigeration mode and a refrigeration dehumidification mode, the heating valve is opened in a heating mode and a heating dehumidification mode, the dehumidification valve is opened in a heating dehumidification mode, and the bypass valve is connected with an electronic expansion valve in parallel.
As shown in the drawings, the control method of the heat pump air conditioning system for the automobile provided by the invention comprises the following steps:
s11, the controller receives a control instruction and judges a required air conditioner mode;
the control instruction comprises an air conditioner starting instruction, an air conditioner closing instruction and an air conditioner mode switching instruction; executing S12 after S11 when the controller receives an air conditioner starting instruction, an air conditioner closing instruction or an air conditioner mode switching instruction;
s12, the controller sends out corresponding opening degree adjusting instructions to the electronic expansion valve according to adjusting requirements, and sends out corresponding actuating instructions to the electromagnetic valves needing to be actuated in sequence, so that the actuating time of each electromagnetic valve is mutually spaced; wherein, the actuating instruction is an opening valve actuating instruction or a closing valve actuating instruction.
According to the control method of the heat pump air conditioning system for the automobile, the actuation time of each electromagnetic valve is mutually separated, so that the risk of noise superposition caused by simultaneous actuation of a plurality of electromagnetic valves is avoided.
Specifically, the interval time may be about 2s, and it should be understood that the interval time is not too long so as to avoid affecting the normal operation of the heat pump air conditioning system.
Further, a valve opening pressure value is preset in the controller; in step S12: and in the process of sending a valve opening actuation instruction to the electromagnetic valve to be opened, calculating the front-back pressure difference of the electromagnetic valve to be opened according to the detection results of the pressure sensor and the temperature sensor, and sending the valve opening actuation instruction to the corresponding electromagnetic valve when judging that the front-back pressure difference is smaller than the valve opening pressure value. Specifically, the valve opening pressure value may be set to about 1bar, but it is needless to say that other values may be set
By the arrangement, the front-back pressure difference of the electromagnetic valve is smaller than the valve opening pressure value when the electromagnetic valve is opened, so that the risk of generating pneumatic noise when the front-back pressure difference is large can be avoided, and the valve opening noise of the electromagnetic valve is reduced.
Specifically, as shown in fig. 6, when the controller receives the air-conditioning mode switching command, S11b is executed after S11, and S11b, the controller sends a compressor stop command or a compressor rotation speed reduction command to the compressor. With such an arrangement, the front-rear pressure difference of the corresponding solenoid valve can be reduced to satisfy the valve opening requirement smaller than the valve opening pressure value.
And S12 is performed with a certain time interval after S11b, and S12b is performed with a certain time interval after S12; and S12b, the controller sends a compressor starting instruction or a compressor recovery rotating speed instruction to the compressor. With the arrangement, the actions of stopping, reducing the rotating speed, starting and recovering the rotating speed of the compressor are mutually separated from the action time of the electromagnetic valve, so that the running noise of the compressor is in a normal level.
Specifically, as shown in fig. 7, when the controller receives an air conditioner start instruction, S12a is executed after S12 at a certain time interval, and the controller sends a compressor start instruction to the compressor S12 a. With the arrangement, the starting action of the compressor and the actuating time of the electromagnetic valve are separated from each other, so that the running noise of the compressor is in a normal level. Specifically, the interval time may be set to about 2 s.
Specifically, as shown in fig. 8, when the controller receives an air conditioner off command, S11a is executed after S11, and S11a, the controller sends a compressor stop command to the compressor; s12 is performed at a certain interval after S11 a. With the arrangement, the stopping action of the compressor and the actuating time of the electromagnetic valve are separated from each other, so that the running noise of the compressor is in a normal level. Specifically, the interval time may be set to about 2 s.
It should be noted that the controller issues a compressor stop command or a compressor rotation speed reduction command to the compressor in S11 b. The two options are provided because the electromagnetic valve is opened and closed during the mode switching process of the heat pump air-conditioning system, and the valve closing operation is performed when the working medium is at a higher pressure value level, so that the valve closing noise can be effectively reduced.
Therefore, even if the pressure difference between the front and the rear of the solenoid valve that needs to be opened meets the valve opening requirement of "the pressure difference between the front and the rear is smaller than the valve opening pressure value", the working medium should be kept at a higher pressure value level as much as possible, that is, the compressor does not need to be stopped when the rotation speed is reduced by the compressor, that is, the valve opening requirement can be met. Of course, in S11b, the controller may directly issue a compressor stop instruction to the compressor.
It should be noted that the determination as to whether or not the valve opening condition is satisfied is not required for each of the solenoid valves requiring valve opening operation, and for example, the determination as to whether or not the valve opening condition is satisfied is not required when the difference in pressure between before and after the operation of the refrigeration valve is not large and the valve opening condition is generally satisfied. Furthermore, for different mode switching processes, the solenoid valves that need to be opened are different, and therefore the solenoid valves that need to be determined are different, which is specifically understood with reference to the specific control flow shown in fig. 11a to 11 m.
Fig. 11a is a schematic control flow diagram illustrating a switching of the heating mode to the heating and dehumidifying mode of the heat pump air conditioning system shown in fig. 1; fig. 11b is a schematic control flow chart illustrating the switching from the heating mode to the cooling and dehumidifying mode of the heat pump air conditioning system shown in fig. 1; FIG. 11c is a schematic view illustrating a control flow of the heat pump air conditioning system of FIG. 1 for switching from the heating mode to the cooling mode; fig. 11d is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 when the heating and dehumidifying mode is switched to heating mode; fig. 11e is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 when the heating dehumidification mode is switched to the cooling dehumidification mode; fig. 11f is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 when the heat pump air conditioning system shown in fig. 1 switches from the heating dehumidification mode to the cooling mode;
FIG. 11g is a schematic control flow chart illustrating the heat pump air conditioning system of FIG. 1 switching from a cooling dehumidification mode to a heating mode; FIG. 11h is a schematic control flow chart illustrating the switching from the cooling dehumidification mode to the heating dehumidification mode of the heat pump air conditioning system shown in FIG. 1; FIG. 11i is a schematic control flow chart illustrating the heat pump air conditioning system of FIG. 1 switching from a cooling dehumidification mode to a cooling mode; fig. 11j is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 switching from a cooling mode to a heating mode; FIG. 11k is a schematic control flow chart illustrating the switching from the cooling mode to the heating and dehumidifying mode of the heat pump air conditioning system shown in FIG. 1; fig. 11m is a schematic control flow chart illustrating the heat pump air conditioning system shown in fig. 1 switching from the cooling mode to the cooling and dehumidifying mode.
It should be understood that the heat pump air conditioning system shown in fig. 1 is described for describing the specific implementation manner of the control method provided by the present invention in detail, but the control method provided by the present invention is not limited to the heat pump air conditioning system shown in fig. 1, and other heat pump air conditioning systems applied to automobiles are also possible.
Further, the control instruction further comprises an air conditioner pause instruction and an air conditioner recovery instruction; when the controller receives the air conditioner pause command, S21a is executed after S11, and the controller sends a compressor stop command to the compressor. And when the controller receives an air conditioner recovery command, executing S21b after S11, and sending a compressor starting command to the compressor by the controller at S21 b.
It should be noted that the air conditioner pause command is different from the air conditioner off command. The air conditioner closing instruction refers to an instruction received by the controller to stop the heat pump air conditioning system when the whole vehicle is parked, and the power supply battery is in a power-off state at the moment. And the air conditioner pause instruction refers to an instruction received by the controller to stop the heat pump air conditioning system when the whole vehicle is not parked, and the power supply battery is in a power-on state at the moment. The air conditioner recovery command corresponds to the air conditioner pause command, and is a command for recovering the heat pump air conditioning system to an operation state before the air conditioner pause command is executed.
Therefore, in the setting state, when the controller receives a pause instruction of the air conditioner, the controller only stops the operation of the compressor, all the electromagnetic valves are not actuated, and the electronic expansion valve is not actuated; accordingly, when the controller receives the air conditioner pause instruction, only the compressor needs to be started. Therefore, the actuation frequency of the electromagnetic valve and the actuation frequency of the electronic expansion valve are reduced, and the actuation noise of the electromagnetic valve and the actuation noise of the electronic expansion valve are reduced.
Further, the opening/closing state of each solenoid valve when not energized is in the opening/closing state corresponding to the cooling mode or the heating mode, and the opening degree of the electronic expansion valve when not energized is in the opening degree corresponding to the cooling mode or the heating mode.
The use probability of the cooling mode and the heating mode is higher than that of other modes, so that the setting state can effectively reduce the actuation frequency of the electromagnetic valve and the actuation frequency of the electronic expansion valve, thereby reducing the actuation noise of the electromagnetic valve and the actuation noise of the electronic expansion valve.
Preferably, the opening/closing state of each solenoid valve when it is not energized is set to the opening/closing state corresponding to the cooling mode, and the opening degree of the electronic expansion valve when it is not energized is set to the opening degree corresponding to the cooling mode. The specific implementation mode can be as follows: the refrigeration valve, the bypass valve and the electronic expansion valve are set to be normally open valves, namely, the refrigeration valve and the bypass valve are in an open state when not electrified, and the electronic expansion valve is in a maximum opening state when not electrified. And setting the heating valve and the dehumidification valve to be normally closed valves, namely, the heating valve and the dehumidification valve are in a closed state when not powered.
Further, a voltage comparison value or a PWM (Pulse Width Modulation) duty ratio comparison value is preset in the controller; the control method further comprises the following steps:
and S3a, when the controller judges that the voltage value of the air blower is smaller than the voltage comparison value or the PWM duty ratio of the air blower is smaller than the PWM duty ratio comparison value, the controller sends a speed limit instruction to the compressor. Specifically, the upper limit of the rotation speed of the compressor may be limited to the middle speed state at this time.
The vehicle speed comparison value can be preset in the controller; the control method further comprises the following steps:
and S3b, when the controller judges that the vehicle speed is less than the vehicle speed comparison value or the vehicle is in an idle state, sending a speed limit instruction to the compressor. Specifically, when the controller judges that the vehicle speed is less than the vehicle speed comparison value, the upper limit of the rotating speed of the compressor can be limited to a medium-speed state; when the controller determines that the vehicle is in the idle state, the upper limit of the rotation speed of the compressor may be limited to a low speed state.
According to the arrangement mode, when the voltage value of the air blower is smaller than the voltage comparison value, the PWM duty ratio of the air blower is smaller than the PWM duty ratio comparison value, the vehicle speed is smaller than the vehicle speed comparison value, and the vehicle is in an idle state, noise such as tire noise and wind noise is not obvious, so that the noise of the compressor is easy to identify, and the running noise of the compressor is reduced by reducing the rotating speed of the compressor, so that the NVH performance of the heat pump air-conditioning system can be improved.
The control method of the heat pump air conditioning system for the automobile provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a control method of heat pump air conditioning system for car, car heat pump air conditioning system includes controller, compressor, electronic expansion valve, a plurality of pressure sensor, a plurality of temperature sensor and a plurality of solenoid valve, obtains different air conditioner modes through opening different solenoid valves and adjusting electronic expansion valve to different apertures, its characterized in that, control method includes:
s11, the controller receives a control instruction and judges a required air conditioner mode;
the control instruction comprises an air conditioner starting instruction, an air conditioner closing instruction and an air conditioner mode switching instruction; executing S12 after S11 when the controller receives an air conditioner starting instruction, an air conditioner closing instruction or an air conditioner mode switching instruction;
s12, the controller sends corresponding opening degree adjusting instructions to the electronic expansion valve according to adjusting requirements and sends corresponding actuating instructions to the electromagnetic valves needing to be actuated in sequence, so that the actuating time of each electromagnetic valve is spaced;
wherein, the actuation command is an open valve actuation command or a close valve actuation command.
2. The control method according to claim 1, wherein a valve opening pressure value is preset in the controller; in step S12: and in the process of sending a valve opening actuation instruction to the solenoid valve needing to be opened, calculating the front-back pressure difference of the solenoid valve needing to be opened according to the detection results of the pressure sensor and the temperature sensor, and sending the valve opening actuation instruction to the corresponding solenoid valve when the front-back pressure difference is judged to be smaller than the valve opening pressure value.
3. The control method according to claim 2, wherein when the controller receives the air conditioner turn-off command, S11a is performed after S11, and S12 is performed at intervals after S11 a;
and S11a, the controller sends a compressor stop instruction to the compressor.
4. The control method according to claim 2, wherein when the controller receives the air conditioner start instruction, S12a is executed at a certain time interval after S12;
and S12a, the controller sends a compressor starting instruction to the compressor.
5. The control method according to claim 2, wherein when the controller receives the air-conditioning mode switching command, S11b is performed after S11, S12 is performed at intervals after S11b, and S12b is performed at intervals after S12;
s11b, the controller sends a compressor stop instruction or a compressor rotating speed reduction instruction to the compressor;
and S12b, the controller sends a compressor starting instruction or a compressor recovery rotating speed instruction to the compressor.
6. The control method according to claim 2, wherein the control instruction further includes an air conditioner pause instruction and an air conditioner resume instruction; when the controller receives the air conditioner pause command, executing S21a after S11; when the controller receives the air conditioner recovery command, executing S21b after S11;
s21a, the controller sends a compressor stop instruction to the compressor;
and S21b, the controller sends a compressor starting instruction to the compressor.
7. The control method according to any one of claims 1 to 6, wherein a switching state of each solenoid valve when not energized is a switching state corresponding to a cooling mode or a heating mode, and an opening degree of the electronic expansion valve when not energized is an opening degree corresponding to a cooling mode or a heating mode.
8. The control method according to claim 7, wherein each solenoid valve includes a cooling valve that is opened in a cooling mode and a cooling and dehumidifying mode, a heating valve that is opened in a heating mode and a heating and dehumidifying mode, a dehumidifying valve that is opened in a heating and dehumidifying mode, a bypass valve that is provided in parallel with the electronic expansion valve; the refrigeration valve and the bypass valve are in an open state when not electrified, and the electronic expansion valve is in a maximum opening state when not electrified; the heating valve and the dehumidification valve are in a closed state when not powered.
9. The control method according to any one of claims 1 to 6, characterized in that a voltage comparison value or a PWM duty ratio comparison value is preset in the controller; the control method further comprises the following steps:
and S3a, when the controller judges that the voltage value of the air blower is smaller than the voltage comparison value or the PWM duty ratio of the air blower is smaller than the PWM duty ratio comparison value, the controller sends a speed limit instruction to the compressor.
10. The control method according to claim 9, characterized in that a vehicle speed comparison value is preset in the controller; the control method further comprises the following steps:
and S3b, when the controller judges that the vehicle speed is less than the vehicle speed comparison value or the vehicle is in an idle state, sending a speed limit instruction to the compressor.
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Publication number Priority date Publication date Assignee Title
CN111288616B (en) * 2018-12-07 2021-12-21 上海汽车集团股份有限公司 Electromagnetic valve control method of heat pump air conditioning system
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CN111993860B (en) * 2020-08-31 2022-02-25 安徽江淮汽车集团股份有限公司 Vehicle refrigeration system control method, equipment, storage medium and device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006021711A (en) * 2004-07-09 2006-01-26 Honda Motor Co Ltd Air conditioner for vehicle
CN102705964A (en) * 2012-05-22 2012-10-03 Tcl空调器(中山)有限公司 Air conditioner and control method thereof
CN103381782A (en) * 2013-06-24 2013-11-06 奇瑞汽车股份有限公司 Electric automobile air conditioning system and control method thereof
CN106414126A (en) * 2014-05-26 2017-02-15 三电控股株式会社 Vehicular air-conditioning device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10006513B4 (en) * 2000-02-15 2014-12-24 Behr Gmbh & Co. Kg Air conditioning system for a motor vehicle with heat pump and / or reheat mode
KR100457569B1 (en) * 2002-11-22 2004-11-18 엘지전자 주식회사 a linear expansion valve's control method for a heat pump system
JP2011245894A (en) * 2010-05-24 2011-12-08 Suzuki Motor Corp Vehicle air-conditioning device
JP6571405B2 (en) * 2015-06-19 2019-09-04 サンデン・オートモーティブクライメイトシステム株式会社 Air conditioner for vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006021711A (en) * 2004-07-09 2006-01-26 Honda Motor Co Ltd Air conditioner for vehicle
CN102705964A (en) * 2012-05-22 2012-10-03 Tcl空调器(中山)有限公司 Air conditioner and control method thereof
CN103381782A (en) * 2013-06-24 2013-11-06 奇瑞汽车股份有限公司 Electric automobile air conditioning system and control method thereof
CN106414126A (en) * 2014-05-26 2017-02-15 三电控股株式会社 Vehicular air-conditioning device

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