Automobile, vehicle-mounted air conditioner and control method of compressor of vehicle-mounted air conditioner

Abstract

The invention discloses an automobile, a vehicle-mounted air conditioner and a control method of a compressor of the vehicle-mounted air conditioner. The control method of the compressor of the vehicle-mounted air conditioner comprises the steps that a first rotating speed limiting value is obtained according to the current real-time power of the compressor and a preset power rotating speed limiting value curve; according to the current working mode of the vehicle-mounted air conditioner and the operation parameters of the compressor, a second rotating speed limiting value is obtained; obtaining battery cooling required power of the vehicle control unit; according to the set temperature of the vehicle-mounted air conditioner, the environment temperature data and the battery cooling required power, a third rotating speed limiting value is obtained; obtaining a fourth rotating speed limit value according to a preset noise vibration limiting strategy; screening out the lowest target rotating speed limit value from the first rotating speed limit value, the second rotating speed limit value, the third rotating speed limit value and the fourth rotating speed limit value; and controlling the compressor to operate according to the target rotating speed limit. The active limit value control function of the rotating speed of the compressor can be achieved, so that the stability of compressor control is guaranteed, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle air conditioners, and in particular to a control method for an automobile, a vehicle air conditioner and a compressor thereof. Background Art

[0002] In existing vehicle air conditioners, no relevant limit strategy is adopted to control the compressor. The compressor can only passively receive requests to work. When faced with extreme special working conditions, it is easy for the compressor to be frequently shut down for protection, and the stability of the compressor operation cannot be guaranteed, thereby reducing the working life of the compressor. Summary of the invention

[0003] In view of this, the present application provides a control method for an automobile, an on-board air conditioner and a compressor thereof, which is used to realize an active limit control function of the compressor speed, thereby ensuring the stability of the compressor control and improving the service life of the compressor. The technical solution of the present application is as follows: The first aspect of the present application provides a method for controlling a compressor of a vehicle air conditioner, comprising: obtaining a first speed limit according to the current real-time power of the compressor and a preset power-speed limit curve; obtaining a second speed limit according to the current working mode of the vehicle air conditioner and the operating parameters of the compressor; obtaining the battery cooling demand power of the vehicle controller; obtaining a third speed limit according to the set temperature of the vehicle air conditioner, ambient temperature data and the battery cooling demand power; obtaining a fourth speed limit according to a preset noise and vibration limitation strategy; screening out the lowest target speed limit from the first speed limit, the second speed limit, the third speed limit and the fourth speed limit; and controlling the operation of the compressor according to the target speed limit.

[0004] In one embodiment of the present application, the compressor control method also includes: when it is determined that the workload of the compressor is greater than or equal to a preset value, transmitting an overload signal to the vehicle controller so that the vehicle controller generates a corresponding power limit; receiving the power limit of the vehicle controller, and controlling the operation of the compressor according to the power limit.

[0005] In one embodiment of the present application, the compressor control method also includes: converting the power limit into a fifth speed limit according to the power speed limit curve; screening out the lowest target speed limit from the first speed limit, the second speed limit, the third speed limit, the fourth speed limit and the fifth speed limit; and controlling the operation of the compressor according to the target speed limit.

[0006] In one embodiment of the present application, the third speed limit is obtained based on the set temperature of the vehicle air conditioner, the ambient temperature data and the battery cooling demand power, including: obtaining a first speed based on the set temperature and the ambient temperature data; obtaining a second speed based on the battery cooling demand power and a preset cooling power speed comparison table; and selecting the maximum speed from the first speed and the second speed as the third speed limit.

[0007] In one embodiment of the present application, the ambient temperature data includes the temperature inside the vehicle, the temperature outside the vehicle and the light intensity; the first speed is obtained according to the set temperature and the ambient temperature data, including: obtaining the target air outlet temperature of the vehicle air conditioner according to the set temperature, the temperature inside the vehicle, the temperature outside the vehicle and the light intensity; obtaining the target evaporator temperature of the vehicle air conditioner according to the target air outlet temperature and a preset temperature curve; obtaining the first speed according to the historical first speed of the previous control cycle, the historical evaporator temperature and the target evaporator temperature.

[0008] In an embodiment of the present application, obtaining the fourth speed limit value according to a preset noise and vibration limitation strategy includes: obtaining the fourth speed limit value according to a blower gear of the vehicle air conditioner and a preset blower gear speed table.

[0009] In one embodiment of the present application, the operating modes include cooling mode, dehumidification mode, heating mode and custom mode, and the operating parameters include pressure value, power module temperature and phase current value; obtaining the second speed limit value according to the current operating mode of the vehicle air conditioner and the operating parameters of the compressor includes: matching with a preset speed limit table according to the current operating mode and the operating parameters of the compressor to obtain the corresponding second speed limit value.

[0010] A second aspect of the present application provides a vehicle air conditioner, including a compressor and a compressor controller, wherein the compressor is connected to the compressor controller, and the compressor controller is used to execute the compressor control method.

[0011] A third aspect of the present application provides a car, comprising a vehicle controller and the vehicle air conditioner, wherein the vehicle controller is connected to the compressor controller.

[0012] In one embodiment of the present application, the vehicle controller is used to obtain the power module temperature of the compressor and the water temperature value of the vehicle when receiving the overload signal transmitted by the compressor controller, match the power module temperature and the water temperature value with a preset power limit table, obtain the power limit value of the compressor, and transmit the power limit value to the compressor controller.

[0013] It can be understood that the present application determines the first speed limit through the real-time power of the compressor, determines the second speed limit according to the vehicle air-conditioning working mode and the compressor working parameters, determines the third speed limit according to the vehicle battery cooling requirements and the riding space temperature adjustment requirements, determines the fourth speed limit according to the noise and vibration, and finally determines a lowest target speed limit from the four speed limits, controls the compressor operation according to the target speed limit, thereby realizing the active limit control function of the compressor speed, thereby ensuring the stability of the compressor control and improving the service life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic block diagram of a vehicle air conditioner provided in an embodiment of the present application.

[0015] Figure 2 It is a flow chart of a compressor control method for a vehicle air conditioner provided in an embodiment of the present application.

[0016] Figure 3 It is a flow chart of a second method for controlling a compressor of a vehicle air conditioner provided in an embodiment of the present application.

[0017] Figure 4 It is a flow chart of a third method for controlling a compressor of a vehicle air conditioner provided in an embodiment of the present application.

[0018] Figure 5 It is a schematic diagram of a flow chart for obtaining a third speed limit value provided in an embodiment of the present application.

[0019] Figure 6 It is a schematic diagram of a flow chart for obtaining a first rotational speed provided in an embodiment of the present application.

[0020] Figure 7 It is a schematic block diagram of a car provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] It should be noted that in the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0022] It should also be noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchangeable with each other, and some of the steps can also be deleted.

[0023] In existing vehicle air conditioners, no relevant limit strategy is adopted to control the compressor. The compressor can only passively receive requests to work. When faced with extreme special working conditions, it is easy for the compressor to be frequently shut down for protection, and the stability of the compressor operation cannot be guaranteed, thereby reducing the working life of the compressor.

[0024] The present application provides a control method for an automobile, an on-vehicle air conditioner and a compressor thereof, which is used to realize an active limit control function of the compressor speed, thereby ensuring the stability of the compressor control and increasing the service life of the compressor.

[0025] Please refer to Figure 1 , Figure 1 A schematic block diagram of a vehicle air conditioner provided in an embodiment of the present application, wherein the vehicle air conditioner 100 includes a compressor 110 and a compressor controller 120 .

[0026] Among them, the compressor controller 120 is used to control the operation of the compressor 110 according to the working status of the vehicle air conditioner 100, and obtain the real-time phase current, speed, temperature, pressure and other parameters of the compressor 110 for feedback control, and the compressor controller 120 can also be connected to the vehicle controller of the car, and work together with the vehicle controller to control the operation of the compressor 110.

[0027] Next, combine Figure 1 Introducing a method for controlling a compressor of a vehicle air conditioner provided in an embodiment of the present application, please refer to Figure 2 , specifically including the following steps: Step S21: Obtain a first speed limit value according to the current real-time power of the compressor and a preset power speed limit value curve.

[0028] In the embodiment of the present application, the power speed limit curve is a curve of the relationship between the real-time power and the speed limit of the compressor. The power speed limit curves of compressors of different models may be different, and may be obtained by the manufacturer through testing before the compressor leaves the factory, and are not limited here. Among them, the power speed limit curve may be pre-stored in the above-mentioned compressor controller, and the compressor controller may also obtain the real-time power of the compressor through the power module of the compressor, and substitute the real-time power as a variable into the power speed limit curve to obtain the corresponding first speed limit.

[0029] Step S22: Obtain a second speed limit value according to the current working mode of the vehicle air conditioner and the operating parameters of the compressor.

[0030] In an embodiment of the present application, the working modes of the vehicle air conditioner may include a cooling mode, a dehumidification mode, and a heating mode, etc. The operating parameters of the compressor may include a pressure value, a power module temperature, and a phase current value. A second speed limit table corresponding to the combination of each working mode and the operating parameter may also be pre-set in the compressor controller. After obtaining the current working mode of the vehicle air conditioner and the operating parameters of the compressor, the compressor controller may match the second speed limit table to obtain the corresponding second speed limit.

[0031] Step S23: Obtain the battery cooling power requirement of the vehicle controller.

[0032] It can be understood that in addition to providing temperature regulation for the passenger space, the onboard air conditioner in the car can also provide cooling for the battery of the car, that is, the onboard air conditioner can use part of its power for refrigeration, thereby cooling the battery of the car. Therefore, the compressor controller can also be connected to the vehicle controller to obtain the battery cooling power required by the vehicle controller, and control the compressor to provide part of its power to cool the battery of the car according to the battery cooling power required.

[0033] Step S24: Obtain a third speed limit value according to the set temperature of the vehicle air conditioner, the ambient temperature data and the battery cooling power requirement.

[0034] In the embodiment of the present application, when the vehicle has a battery cooling requirement, the compressor controller receives the battery cooling requirement power from the vehicle controller, and can also obtain the third speed limit value according to the battery cooling requirement power and the temperature adjustment requirement of the passenger space. The temperature adjustment requirement of the passenger space includes the above-mentioned vehicle air conditioner set temperature and the ambient temperature data of the vehicle.

[0035] Step S25: Obtaining a fourth speed limit value according to a preset noise and vibration limitation strategy.

[0036] In the embodiment of the present application, the compressor controller may also obtain a fourth speed limit value of the compressor according to a preset noise and vibration limiting strategy. For example, a noise detection unit may also be provided in the vehicle air conditioner, and the compressor controller is connected to the noise detection unit and obtains the decibel value output by the noise detection unit to obtain the corresponding fourth speed limit value according to the decibel value.

[0037] Step S26: Filter out the lowest target speed limit value from the first speed limit value, the second speed limit value, the third speed limit value and the fourth speed limit value.

[0038] Step S27: Control the operation of the compressor according to the target speed limit.

[0039] In an embodiment of the present application, after obtaining the first speed limit, the second speed limit, the third speed limit and the fourth speed limit, the compressor controller can filter out the lowest target speed limit from the four speed limits to control the operation of the compressor according to the target speed limit.

[0040] It can be understood that the embodiment of the present application determines the first speed limit through the real-time power of the compressor, determines the second speed limit according to the vehicle air-conditioning operating mode and the compressor operating parameters, determines the third speed limit according to the vehicle battery cooling requirements and the riding space temperature adjustment requirements, and determines the fourth speed limit according to the noise and vibration. Finally, a lowest target speed limit is determined from the four speed limits, and the compressor operation is controlled according to the target speed limit, thereby realizing the active limit control function of the compressor speed, thereby ensuring the stability of the compressor control and improving the service life of the compressor.

[0041] Please refer to Figure 3 , Figure 3 The flowchart of the second vehicle air conditioner compressor control method provided in the embodiment of the present application is shown in FIG. Figure 3 The steps S31 to S37 shown in FIG. Figure 2 The steps S21 to S27 shown are the same and will not be repeated here. Figure 3 The method shown also includes: Step S38: When it is determined that the workload of the compressor is greater than or equal to a preset value, an overload signal is transmitted to the vehicle controller so that the vehicle controller generates a corresponding power limit value.

[0042] In the embodiment of the present application, the compressor controller can also detect the workload of the compressor in real time, and transmit an overload signal to the vehicle controller when the workload is greater than or equal to a preset value. After receiving the overload signal of the compressor, the vehicle controller can generate a corresponding compressor power limit and transmit it back to the compressor controller.

[0043] For example, the compressor controller can detect the real-time power of the compressor in real time, and use the ratio of the real-time power to the maximum power of the compressor as the above-mentioned workload, and output the above-mentioned overload signal when the workload is greater than or equal to 80%.

[0044] Step S39: receiving the power limit value of the vehicle controller, and controlling the operation of the compressor according to the power limit value.

[0045] In the embodiment of the present application, the compressor controller controls the compressor to operate according to the power limit value while controlling the compressor not to exceed the target speed limit value, so that the compressor does not exceed the power limit value at the same time. It can be understood that in this embodiment, the target speed limit value and the power limit value cooperate to control the operation of the compressor, which can better enable the compressor to operate in a stable range under various working conditions, thereby further improving the stability and life of the compressor control.

[0046] Please refer to Figure 4 , Figure 4 The flowchart of the third vehicle air conditioner compressor control method provided in the embodiment of the present application is shown in FIG. Figure 4 The steps S41 to S45 shown are the same as those described above. Figure 2 The steps S21 to S25 shown are the same and will not be repeated here. Figure 4 The method shown also includes: Step S46: When it is determined that the workload of the compressor is greater than or equal to a preset value, an overload signal is transmitted to the vehicle controller so that the vehicle controller generates a corresponding power limit value.

[0047] Step S47: Convert the power limit to the fifth speed limit according to the power speed limit curve.

[0048] Step S48: Filter out the lowest target speed limit from the first speed limit, the second speed limit, the third speed limit, the fourth speed limit and the fifth speed limit.

[0049] Step S49: Control the operation of the compressor according to the target speed limit.

[0050] In the embodiment of the present application, when the workload of the compressor is greater than or equal to the preset value, the compressor controller can also convert the power limit value sent back by the vehicle controller into a speed limit value, that is, the compressor controller converts the power limit value into a fifth speed limit value according to the power speed limit value curve, and then selects the lowest target speed limit value together with the first speed limit value, the second speed limit value, the third speed limit value and the fourth speed limit value, and controls the operation of the compressor according to the target speed limit value. Since the power limit value is converted into the fifth speed limit value, the compressor controller only needs to control the compressor according to the speed limit value, and can realize the coordinated control of the power limit value, that is, the speed limit value, thereby reducing the control requirements of the compressor controller, thereby reducing the control cost.

[0051] In some embodiments, Figure 5 As shown, the step of obtaining the third speed limit value according to the set temperature of the vehicle air conditioner, the ambient temperature data and the battery cooling required power specifically includes: Step S51: obtaining a first rotation speed according to the set temperature and the ambient temperature data.

[0052] In the embodiment of the present application, the above-mentioned set temperature is the output temperature of the vehicle air conditioner set by the user. A temperature detection unit may also be provided in the vehicle air conditioner or the car, and the compressor control unit may obtain the above-mentioned ambient temperature data through the temperature detection unit. In addition, a temperature-speed relationship table may also be pre-stored in the compressor control unit, and the compressor control unit matches the temperature-speed relationship table with the set temperature and ambient temperature data to obtain the first speed.

[0053] Step S52: Obtain a second rotation speed according to the battery cooling power requirement and a preset cooling power rotation speed comparison table.

[0054] In an embodiment of the present application, the above-mentioned refrigeration power speed comparison table may also be pre-stored in the compressor controller. After obtaining the battery cooling demand power transmitted by the vehicle controller, the battery cooling demand power may be matched with the refrigeration power speed comparison table to obtain the above-mentioned first speed.

[0055] For example, the refrigeration power speed comparison table can be: Step S53: Filter out the maximum speed from the first speed and the second speed as the third speed limit.

[0056] In an embodiment of the present application, a first speed is first obtained through the set temperature of the vehicle air conditioner and the ambient temperature data of the vehicle, and then a second speed is obtained through the battery cooling demand power, and finally a third speed limit is obtained based on the first speed and the second speed. This can effectively combine the user's temperature control requirements and the vehicle's battery cooling requirements. When the obtained third speed limit is used to control the operation of the compressor, both the user's temperature regulation experience and the vehicle's battery cooling requirements can be ensured.

[0057] In some embodiments, the ambient temperature data includes the temperature inside the vehicle, the temperature outside the vehicle, and the light intensity, such as Figure 6 As shown, the step of obtaining the first rotation speed according to the set temperature and the ambient temperature data specifically includes: Step S61: Obtain the target air outlet temperature of the vehicle air conditioner according to the set temperature, the temperature inside the vehicle, the temperature outside the vehicle and the light intensity.

[0058] In the embodiment of the present application, a temperature sensor may be provided inside and outside the vehicle to obtain the temperature inside the vehicle and the temperature outside the vehicle, and a light sensor may be provided outside the vehicle to obtain the light intensity. The vehicle controller may be connected to the temperature sensor and the light sensor, and after obtaining the temperature inside the vehicle, the temperature outside the vehicle and the light intensity, the light intensity may be transmitted to the compressor controller.

[0059] The target air outlet temperature calculation formula may include: target air outlet temperature = set temperature a Outside temperature b Temperature inside the car c Light intensity It can be understood that the coefficients a, b, c and d in the above formula can be obtained through experiments and are not limited here.

[0060] Step S62: Obtaining a target evaporator temperature of the vehicle air conditioner according to the target air outlet temperature and a preset temperature curve.

[0061] In an embodiment of the present application, the above-mentioned preset temperature curve is a relationship curve between the target air outlet temperature and the target evaporator temperature. The preset temperature curve can also be pre-stored in the compressor controller. After obtaining the target air outlet temperature, the preset temperature curve can be substituted into the preset temperature curve to obtain the corresponding target evaporator temperature.

[0062] Step S63: Obtaining the first speed according to the historical first speed, the historical evaporator temperature and the target evaporator temperature of the previous control cycle.

[0063] In the embodiment of the present application, the formula for the first speed may include: SPD1 (n) = SPD1 (n-1) + Kp (E (n) - E (n-1)) + Ki × E (n). In the formula, SPD1 (n) is the first speed, SPD1 (n-1) is the historical first speed, Kp is the proportional constant of proportional integral control, Ki is the integral constant of proportional integral control, E (n) is the difference between the target evaporator temperature and the real-time evaporator temperature, and E (n-1) is the difference between the historical evaporator temperature and the real-time evaporator temperature in the previous control cycle.

[0064] In some embodiments, the fourth speed limit value may be obtained according to the blower gear of the vehicle air conditioner and a preset blower gear speed table. For example, as shown in the following table: In some embodiments, the working modes include cooling mode, dehumidification mode, heating mode and custom mode, and the operating parameters include pressure value, power module temperature and phase current value. The step of obtaining the second speed limit value according to the current working mode of the vehicle air conditioner and the operating parameters of the compressor specifically includes: matching with a preset speed limit table according to the current working mode and the operating parameters of the compressor to obtain the corresponding second speed limit value.

[0065] For example, the preset speed limit table can be: Please refer to Figure 7 , Figure 7A schematic block diagram of a car provided in an embodiment of the present application, wherein the car 10 includes a vehicle controller 11 and a vehicle air conditioner 100 of any of the above embodiments, wherein the vehicle controller 11 is connected to a compressor controller 120 of the vehicle air conditioner 100 .

[0066] Among them, the vehicle controller 11 is used to obtain the power module temperature of the compressor 110 and the water temperature value of the car 10 when receiving the overload signal transmitted by the compressor controller 120, match the power module temperature and the water temperature value with the preset power limit table, obtain the power limit value of the compressor 110, and transmit the power limit value to the compressor controller 120.

[0067] In some embodiments, the power limit table may be: An embodiment of the present application further provides a computer storage medium, which stores a computer program. When the computer program is executed by a processor, the processor executes the above-mentioned current control method.

[0068] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer storage medium or transmitted through the computer storage medium. The computer instructions may be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0069] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes. In the absence of conflict, the technical features in this embodiment and the implementation scheme can be combined arbitrarily.

[0070] The embodiments described above are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the protection scope determined by the claims of the present application.

Claims

1. A method for controlling a compressor of a vehicle air conditioner, characterized in that: include: Obtaining a first speed limit value according to the current real-time power of the compressor and a preset power speed limit value curve; Obtaining a second speed limit value according to a current operating mode of the vehicle air conditioner and operating parameters of the compressor; Obtain the battery cooling power requirement of the vehicle controller; Obtaining a third speed limit value according to the set temperature of the vehicle air conditioner, ambient temperature data and the battery cooling required power; According to a preset noise and vibration limiting strategy, a fourth speed limit value is obtained; Filtering out a lowest target speed limit value from the first speed limit value, the second speed limit value, the third speed limit value and the fourth speed limit value; The compressor is controlled to operate according to the target speed limit.

2. The compressor control method according to claim 1, characterized in that: Also includes: When it is determined that the workload of the compressor is greater than or equal to a preset value, an overload signal is transmitted to the vehicle controller so that the vehicle controller generates a corresponding power limit value; A power limit value of the vehicle controller is received, and the operation of the compressor is controlled according to the power limit value.

3. The compressor control method according to claim 2, characterized in that: Also includes: converting the power limit into a fifth speed limit according to the power speed limit curve; Filtering out the lowest target speed limit value from the first speed limit value, the second speed limit value, the third speed limit value, the fourth speed limit value and the fifth speed limit value; The compressor is controlled to operate according to the target speed limit.

4. The compressor control method according to claim 1, characterized in that: The obtaining of the third speed limit value according to the set temperature of the vehicle air conditioner, the ambient temperature data and the battery cooling required power includes: Obtaining a first rotation speed according to the set temperature and the ambient temperature data; Obtaining a second speed according to the battery cooling required power and a preset cooling power speed comparison table; The maximum rotation speed is selected from the first rotation speed and the second rotation speed as the third rotation speed limit.

5. The compressor control method according to claim 4, characterized in that: Ambient temperature data includes the temperature inside the vehicle, the temperature outside the vehicle, and the light intensity; The obtaining of the first rotation speed according to the set temperature and the ambient temperature data comprises: Obtaining a target air outlet temperature of the vehicle air conditioner according to the set temperature, the vehicle interior temperature, the vehicle exterior temperature, and the light intensity; Obtaining a target evaporator temperature of the vehicle air conditioner according to the target air outlet temperature and a preset temperature curve; The first speed is obtained according to the historical first speed of the previous control cycle, the historical evaporator temperature and the target evaporator temperature.

6. The compressor control method according to any one of claims 1 to 5, characterized in that: The obtaining of the fourth speed limit value according to the preset noise and vibration limiting strategy includes: The fourth speed limit is obtained according to the blower gear of the vehicle air conditioner and a preset blower gear speed table.

7. The compressor control method according to claim 6, characterized in that: The working modes include cooling mode, dehumidification mode, heating mode and custom mode, and the operating parameters include pressure value, power module temperature and phase current value; The obtaining of the second speed limit value according to the current working mode of the vehicle air conditioner and the operating parameters of the compressor includes: According to the current working mode and the operating parameters of the compressor, matching is performed with a preset speed limit table to obtain the corresponding second speed limit.

8. A vehicle air conditioner, characterized in that: It comprises a compressor and a compressor controller, wherein the compressor is connected to the compressor controller, and the compressor controller is used to execute the compressor control method according to any one of claims 1 to 7.

9. A car, characterized in that: It comprises a vehicle controller and the vehicle air conditioner as claimed in claim 8, wherein the vehicle controller is connected to the compressor controller.

10. The automobile according to claim 9, characterized in that The vehicle controller is used to obtain the power module temperature of the compressor and the water temperature value of the car when receiving the overload signal transmitted by the compressor controller, match the power module temperature and the water temperature value with a preset power limit table, obtain the power limit value of the compressor, and transmit the power limit value to the compressor controller.

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