Vehicle, electronic expansion valve control method and device and medium

Abstract

The invention discloses a vehicle, an electronic expansion valve control method and device and a medium, the method is applied to an air conditioning system of the vehicle, an electronic expansion valve is provided with a first side and a second side which are oppositely arranged, and the method comprises the steps that when the air conditioning system is closed, the current position of the electronic expansion valve is obtained; if the current position is different from the first target position, the electronic expansion valve is controlled to move to the first target position according to the preset speed, the preset speed is smaller than or equal to the speed threshold value, the preset speed is in positive correlation with the pressure difference change rate, and the pressure difference change rate is the pressure difference change rate in the movement process of the electronic expansion valve. A rate of change of a pressure difference between the first side and the second side; and when the electronic expansion valve reaches the first target position, the pressure difference value between the first side and the second side is smaller than or equal to a preset difference value. The vibration of the motor of the electronic expansion valve can become slow and discontinuous, so that the noise generated by the vibration of the motor is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present application belongs to the field of valve control technology, and in particular, relates to a vehicle, an electronic expansion valve control method, a device and a medium. Background Art

[0002] The heat pump air conditioning system in new energy vehicles can be used to adjust the temperature of the passenger compartment and to cool the fuel cell. In order to better distribute the cooling capacity between the passenger compartment and the fuel cell, an electronic expansion valve is usually used to adjust the refrigerant flow to achieve cooling capacity distribution.

[0003] Currently, during the use of the electronic expansion valve, the movement of the motor of the electronic expansion valve will generate noise, thus affecting the user experience. Summary of the invention

[0004] The embodiments of the present application provide a vehicle, an electronic expansion valve control method, a device and a medium, which can reduce the noise generated by the movement of the electronic expansion valve at least to a certain extent and improve the user experience.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] In a first aspect, an embodiment of the present application provides an electronic expansion valve control method, which is applied to an air conditioning system of a vehicle, wherein the electronic expansion valve has a first side and a second side arranged opposite to each other, and the method includes:

[0007] When the air conditioning system is turned off, obtaining a current position of the electronic expansion valve;

[0008] If the current position is different from the first target position, the electronic expansion valve is controlled to move to the first target position at a preset speed, wherein the preset speed is less than or equal to a speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

[0009] Optionally, controlling the electronic expansion valve to move to the first target position at a preset speed includes:

[0010] The electronic expansion valve is controlled to maintain the current position for a first time period and then move to the first target position at the preset speed.

[0011] Optionally, before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0012] Detecting a vehicle locking signal of the vehicle;

[0013] If the vehicle locking signal is not detected, the step of controlling the electronic expansion valve to move to the first target position at a preset speed is performed.

[0014] Optionally, before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0015] Detecting a vehicle locking signal of the vehicle;

[0016] If the vehicle locking signal is not detected, the electronic expansion valve is maintained at the current position, and the step of controlling the electronic expansion valve to move to the first target position at a preset speed is not performed.

[0017] Optionally, the air conditioning system includes a refrigerant and a compressor, the electronic expansion valve is used to adjust the flow of the refrigerant, and when controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0018] If the air-conditioning system is started and the compressor is started before the electronic expansion valve reaches the first target position, when it reaches the first target position, or a second time after it reaches the first target position, the electronic expansion valve is controlled to move to the second target position; wherein, when the electronic expansion valve is at the third target position, the refrigerant has not reached the compressor, and the third target position is the first target position, or a position between the current position and the first target position.

[0019] Optionally, the air conditioning system includes a refrigerant and a compressor, and the electronic expansion valve is used to adjust the flow of the refrigerant. After maintaining the electronic expansion valve at the current position, the method further includes:

[0020] If the air conditioning system is started and the compressor is started, the electronic expansion valve is controlled to move to a second target position, wherein when the electronic expansion valve is located at the current position, the refrigerant does not reach the compressor.

[0021] Optionally, the first target position is located at a middle position of a total stroke of the electronic expansion valve.

[0022] A second aspect of an embodiment of the present application provides an electronic expansion valve control device, which is applied to an air conditioning system of a vehicle, wherein the electronic expansion valve has a first side and a second side arranged opposite to each other, and the device comprises:

[0023] an acquisition unit, configured to acquire a current position of the electronic expansion valve when the air conditioning system is turned off;

[0024] A control unit, used for controlling the electronic expansion valve to move to the first target position at a preset speed if the current position is different from the first target position, wherein the preset speed is less than or equal to a speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

[0025] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which at least one computer program instruction is stored. The at least one computer program instruction is loaded and executed by a processor to implement the operations performed by any method described in the first aspect.

[0026] According to a fourth aspect of an embodiment of the present application, a vehicle is provided, comprising a controller and an air-conditioning system, wherein the air-conditioning system is provided with an electronic expansion valve, the electronic expansion valve is communicatively connected to the controller, and the controller is used to perform operations as described in any of the methods described in the first aspect.

[0027] According to the fifth aspect of an embodiment of the present application, an electronic device is provided, comprising one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by any of the methods described in the first aspect.

[0028] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0029] The electronic expansion valve control method of the present application is applied to the air-conditioning system of a vehicle. The electronic expansion valve has a first side and a second side arranged relatively to each other, namely a high-pressure side and a low-pressure side for adjusting the flow rate of refrigerant. The method comprises: when the air-conditioning system is turned off, obtaining the current position of the electronic expansion valve; if the current position is different from the first target position, controlling the electronic expansion valve to move to the first target position at a preset speed, wherein the preset speed is less than or equal to the speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, which is the change rate of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference. It is understandable that when the air-conditioning system is turned off, in order to achieve a pressure balance between the first side and the second side of the electronic expansion valve, it is usually necessary to adjust the opening of the electronic expansion valve to a larger degree to release the pressure on the high-pressure side. In order to reduce the noise generated by the vibration of the motor during the opening adjustment of the electronic expansion valve, the embodiment of the present application moves the electronic expansion valve to a first target position at a preset speed (the speed is less than or equal to a speed threshold), so that the vibration of the motor becomes slow and discontinuous, thereby reducing the noise generated by the motor vibration and improving the user experience.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0032] Figure 1 A schematic diagram showing the structure of an air conditioning system according to an embodiment of the present application is shown;

[0033] Figure 2 A flow chart showing an electronic expansion valve control method according to an embodiment of the present application is shown;

[0034] Figure 3 A structural diagram of an electronic expansion valve control device according to an embodiment of the present application is shown;

[0035] Figure 4 A schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0038] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0039] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0040] It should also be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0041] See also Figure 1 , showing a schematic structural diagram of the air-conditioning system in an embodiment of the present application.

[0042] like Figure 1As shown, at present, the heat pump air conditioning system of new energy vehicles includes: compressor 1, PTC (Positive Temperature Coefficient, positive temperature coefficient heater) 2, pressure temperature sensor 3, outdoor temperature sensor 4, outdoor heat exchanger 5, gas-liquid separator 6, electronic expansion valve 7, solenoid valve 8, warm air core 9, evaporator 10, water-water heat exchanger 11, water-cooled condenser 12, coaxial heat exchanger 13 and water pump 14 and other components, and the above components are connected through air conditioning pipelines. In addition, the air conditioning pipeline is also connected to the battery cooler 15, and one of the electronic expansion valves 7 is set on the air conditioning pipeline on one side of the fuel cell cooler 15. The air conditioning system can adopt the cooling mode when the ambient temperature is high, which is equivalent to the cooling mode of the traditional air conditioner to provide cold air to the crew cabin to reach the human body comfortable temperature; the heat pump air conditioning system can use the heat pump heating mode when the ambient temperature is low, to provide heat to the passenger cabin to reach the human body comfortable temperature.

[0043] At present, the heat pump air conditioning system of new energy vehicles needs to cool the fuel cell in addition to cooling the passenger compartment. Therefore, the air conditioning system needs to reasonably distribute the cooling capacity according to the needs of the passenger compartment and the fuel cell. In order to better distribute the cooling capacity between the passenger compartment and the fuel cell, an electronic expansion valve is usually set in the air conditioning system (for example, an electronic expansion valve is set in the evaporator of the passenger compartment, an electronic expansion valve is set in the electronic cooler, and an electronic expansion valve is set in the outdoor heat exchanger, etc.) to adjust the refrigerant flow, thereby realizing cooling capacity distribution.

[0044] It is understandable that when the air conditioning system is turned off after being used for a period of time, it is usually necessary to release the pressure on the high-pressure side of the electronic expansion valve so that the pressure on the high-pressure side and the low-pressure side can be balanced to ensure the safety of the system. At present, when the air conditioning system is turned off, the opening of the electronic expansion valve is adjusted to be larger. For example, the total stroke of the electronic expansion valve is 600 steps. It moves from the current position (for example, 60 steps) to the full open (i.e., 600 steps). The duration of this process is about 20 seconds. During the operation of the electronic expansion valve, the motor continues to vibrate, thereby generating noise, which is commonly known as "beep sound". When the vehicle is in a quiet environment, the user's perception of the noise will be more obvious, resulting in a poor user experience.

[0045] In view of this, an embodiment of the present application provides an electronic expansion valve control method, which can make the vibration of the motor slow and discontinuous to a certain extent, thereby reducing the noise generated by the motor vibration and improving the user experience.

[0046] The electronic expansion valve control method of the embodiment of the present application is described in detail below with reference to the specific drawings.

[0047] See also Figure 2, shows a flow chart of an electronic expansion valve control method according to an embodiment of the present application.

[0048] like Figure 2 As shown, the first aspect of the embodiment of the present application provides an electronic expansion valve control method, which is applied to the air-conditioning system of a vehicle. The electronic expansion valve has a first side and a second side arranged opposite to each other. The method can be executed in a controller of the air-conditioning system, or in other controllers on the vehicle, such as a vehicle controller, etc. Taking the controller of the air-conditioning system as an example, the method includes but is not limited to:

[0049] Step S10. When the air conditioning system is turned off, obtaining the current position of the electronic expansion valve;

[0050] It can be understood that the current position of the electronic expansion valve refers to the position of the electronic expansion valve when the air conditioning system is turned off. The position of the electronic expansion valve corresponds to the opening of the electronic expansion valve. For example, if the total stroke of the electronic expansion valve is 600 steps and the current position of the electronic expansion valve is 60 steps, the opening is 10%.

[0051] It should be noted that the position adjustment of the electronic expansion valve is related to factors such as the ambient temperature, humidity, pressure difference between the high-pressure side and the low-pressure side, and refrigerant flow rate of the electronic expansion valve. It can be adjusted according to the cooling capacity distribution of the evaporator and the fuel cell, which is not limited here. Therefore, when the air-conditioning system is turned off, the current position of the electronic expansion valve varies according to the different cooling capacity adjustment requirements. Under normal circumstances, in order to maintain the pressure difference between the high-pressure side and the low-pressure side, so that the refrigerant is converted from liquid refrigerant to gaseous refrigerant when it reaches the low-pressure side from the high-pressure side, the current position of the electronic expansion valve is approximately at 1 / 5 to 1 / 3 of the total stroke.

[0052] Step S20. If the current position is different from the first target position, the electronic expansion valve is controlled to move to the first target position at a preset speed, wherein the preset speed is less than or equal to a speed threshold, and the preset speed is positively correlated with the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

[0053] It should be noted that when the air conditioning system is turned off after being used for a period of time, it is usually necessary to release the pressure on the high-pressure side of the electronic expansion valve so that the pressure on the high-pressure side and the low-pressure side can be balanced to ensure system safety. When the air conditioning system is turned off, the opening of the electronic expansion valve needs to be adjusted to a larger value. Therefore, the first target position can be greater than or equal to half of the total stroke of the electronic expansion valve. For example, the total stroke of the electronic expansion valve is 600 steps, and the first target position can be 300 steps, 350 steps, 400 steps, 500 steps, 600 steps, etc.

[0054] In some embodiments, the first target position is located at a middle position of a total stroke of the electronic expansion valve.

[0055] Among them, when the first target position is set at about 300 steps, that is, about half of the total stroke, the electronic expansion valve can reach the position to be adjusted more quickly when the air-conditioning system is started next time, thereby adjusting the cooling capacity more quickly and reducing waiting time.

[0056] Therefore, if the current position is different from the first target position, it is necessary to control the electronic expansion valve to move to the first target position, so as to adjust the opening of the electronic expansion valve to a larger value and release the pressure on the high-pressure side. In order to reduce the noise generated by the motor vibration during the opening adjustment process of the electronic expansion valve, the embodiment of the present application moves the electronic expansion valve to the first target position at a preset speed (the speed is less than or equal to the speed threshold), so that the vibration of the motor becomes slow and discontinuous, thereby reducing the noise generated by the motor vibration and improving the user experience.

[0057] Among them, the first preset speed can be 1 step / 5 seconds, 1 step / 6 seconds, 1 step / 10 seconds, etc., and can be adjusted specifically according to the pressure difference between the high-pressure side and the low-pressure side. For example, when the pressure difference is large, the first preset speed can be set to be large, and when the pressure difference is small, the first preset speed can be set to be small. In addition, the first preset speed is positively correlated with the pressure difference change rate between the high-pressure side and the low-pressure side, that is, the larger the first preset speed, the larger the pressure difference change rate, and the smaller the first preset speed, the smaller the pressure difference change rate. Therefore, the first preset speed can also be set by comprehensively considering system safety (the pressure difference between the high-pressure side and the low-pressure side has an impact on system safety) and reducing motor vibration, thereby ensuring system safety and making the vibration of the motor slow and discontinuous, thereby reducing the noise generated by motor vibration and improving user experience.

[0058] In some embodiments, controlling the electronic expansion valve to move to the first target position at a preset speed includes:

[0059] The electronic expansion valve is controlled to maintain the current position for a first time period and then move to the first target position at the preset speed.

[0060] It is understandable that in order to ensure the safety of the system, a smaller through hole is usually provided between the high-pressure side and the low-pressure side of the electronic expansion valve, and the through hole does not affect the cooling capacity regulation under normal circumstances. When the electronic expansion valve is maintained in the current position for a sufficient period of time, the pressure on the high-pressure side can also be gradually released through the through hole. Based on this, in order to further reduce the noise generated by the vibration of the motor, when the air-conditioning system is turned off, the embodiment of the present application maintains the electronic expansion valve in the current position for a first period of time to gradually release the refrigerant pressure on the high-pressure side, wherein the first period of time can be 10 seconds, 15 seconds, 30 seconds, 1 minute, etc., which is not limited here.

[0061] In some embodiments, before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0062] Step S11A 'detects the vehicle lock signal of the vehicle;

[0063] It can be understood that the vehicle locking signal can be used to indicate whether the user has left the vehicle.

[0064] Step S12A'. If the vehicle locking signal is not detected, the step of controlling the electronic expansion valve to move to the first target position at a preset speed is executed.

[0065] It should be noted that if the vehicle lock signal is not detected, it means that the user has not left the vehicle, then the noise generated by the vibration of the motor of the electronic expansion valve is likely to be perceived by the user, thereby causing user complaints. Based on this, in the embodiment of the present application, when the user has not left the vehicle, the electronic expansion valve is controlled to move to the first target position at a preset speed, thereby reducing the noise generated by the motor vibration and reducing user complaints.

[0066] It is understandable that if the vehicle lock signal is detected, it means that the user has left the vehicle, so even if the motor vibration of the electronic expansion valve generates noise, it will not be perceived by the user. In this case, in order to improve system safety, when the air conditioner is turned off, the electronic expansion valve can be controlled to move quickly from the current position to the first target position, so that the pressure on the high-pressure side and the low-pressure side is quickly balanced. In some embodiments, before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0067] Step S11 B'. Detecting the vehicle lock signal of the vehicle;

[0068] Step S12B'. If the vehicle locking signal is not detected, the electronic expansion valve is maintained at the current position, and the step of controlling the electronic expansion valve to move to the first target position at a preset speed is not performed.

[0069] It is understandable that when the vehicle locking signal is not detected, that is, the user has not left the vehicle, in order to further reduce the impact of noise generated by electronic vibration on the user, the electronic expansion valve is controlled to remain in the current position, that is, the motor does not move, so that no noise is generated due to vibration, thereby improving the user experience.

[0070] In some embodiments, the air conditioning system includes a refrigerant and a compressor, the electronic expansion valve is used to adjust the flow of the refrigerant, and when controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes:

[0071] Step S30. If the air-conditioning system is started and the compressor is started before the electronic expansion valve reaches the first target position, when it reaches the first target position, or a second time after it reaches the first target position, the electronic expansion valve is controlled to move to the second target position; wherein, when the electronic expansion valve is at the third target position, the refrigerant has not reached the compressor, and the third target position is the first target position, or a position between the current position and the first target position.

[0072] It should be noted that one of the usage scenarios of the air-conditioning system may be: the air-conditioning system is quickly started after being turned off. In the related art, when the air-conditioning is turned off, the electronic expansion valve moves from the current position to fully open, and the liquid refrigerant will flow to the compressor. If the air-conditioning system is quickly turned on again at this time, that is, the compressor is started, that is, the compressor is in a state of starting with liquid (liquid refrigerant), the compressor cannot compress the liquid refrigerant, so the liquid refrigerant will have abnormal jitters during the compressor startup process, which is commonly known as "clicking sound". In addition, when the air-conditioning system is turned on, the electronic expansion valve also needs to move to the position to be adjusted. The whole process lasts about 15 seconds. The motor vibration of the electronic expansion valve produces a "beep sound", but the "beep sound" may be masked by the noise generated by the blower when the air-conditioning system is turned on, so the user's perception is not obvious.

[0073] Therefore, in the scenario where the air-conditioning system is turned off and then turned on quickly, it is necessary to design the control of the electronic expansion valve to avoid the noise caused by abnormal jitter of the compressor during startup.

[0074] It should be noted that the second target position refers to the target opening of the electronic expansion valve determined after the air conditioning system is turned on, based on factors such as ambient temperature, the pressure difference between the high-pressure side and the low-pressure side, etc. The second duration can be a shorter duration, such as 1 second, 2 seconds, 3 seconds, etc., to adapt to the scenario where the air conditioning system is turned off and then turned on quickly.

[0075] It can be understood that by setting the preset speed, the electronic expansion valve moves to the first target position at a relatively slow speed, so that the refrigerant cannot reach the compressor quickly. Then, when the compressor is started, since the refrigerant has not yet entered the compressor, or the refrigerant entering the compressor is the gaseous refrigerant on the low-pressure side, the start-up of the compressor will not produce abnormal jitter, and therefore there will be no "clicking sound", thereby improving the user experience.

[0076] In some embodiments, the air conditioning system includes a refrigerant and a compressor, the electronic expansion valve is used to adjust the flow of the refrigerant, and after maintaining the electronic expansion valve at the current position, the method further includes:

[0077] If the air conditioning system is started and the compressor is started, the electronic expansion valve is controlled to move to a second target position, wherein when the electronic expansion valve is located at the current position, the refrigerant does not reach the compressor.

[0078] It is understandable that in the scenario where the air conditioning system is turned off and then turned on quickly, the refrigerant cannot quickly reach the compressor because the electronic expansion valve is kept in the current position when the air conditioning system is turned off. Then, when the compressor starts, since the refrigerant has not yet entered the compressor, or the refrigerant entering the compressor is the gaseous refrigerant on the low-pressure side, the startup of the compressor will not produce abnormal jitter, so there will be no "clicking sound", thereby improving the user experience.

[0079] See also Figure 3 , shows a structural diagram of an electronic expansion valve control device in an embodiment of the present application.

[0080] like Figure 3 As shown, the second aspect of the embodiment of the present application provides an electronic expansion valve control device 200, which is applied to the air conditioning system of a vehicle. The electronic expansion valve has a first side and a second side that are arranged opposite to each other. The device 200 includes:

[0081] An acquisition unit 201 is used to acquire the current position of the electronic expansion valve when the air conditioning system is turned off;

[0082] The control unit 202 is used to control the electronic expansion valve to move to the first target position at a preset speed if the current position is different from the first target position, wherein the preset speed is less than or equal to a speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

[0083] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which at least one computer program instruction is stored. The at least one computer program instruction is loaded and executed by a processor to implement the operations performed by any method described in the first aspect.

[0084] The computer readable storage medium may be a portable compact disk read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the computer readable storage medium of the present application is not limited thereto, and in the present application, the readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, apparatus, or device.

[0085] The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more conductors, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0086] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0087] According to a fourth aspect of an embodiment of the present application, a vehicle is provided, comprising a controller and an air-conditioning system, wherein the air-conditioning system is provided with an electronic expansion valve, the electronic expansion valve is communicatively connected to the controller, and the controller is used to perform operations as described in any of the methods described in the first aspect.

[0088] See also Figure 4 , which is a schematic diagram of the structure of a computer system suitable for implementing an electronic device of an embodiment of the present application.

[0089] According to the fifth aspect of an embodiment of the present application, an electronic device is provided, comprising one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement operations performed by any method of the first aspect.

[0090] like Figure 4 As shown, the electronic device 400 is in the form of a general computing device. The components of the electronic device 400 may include but are not limited to: at least one processing unit 410, at least one storage unit 420, and a bus 430 connecting different system components (including the storage unit 420 and the processing unit 410).

[0091] The storage unit stores program codes, which can be executed by the processing unit 410, so that the processing unit 410 executes the steps described in the above “Embodiment Method” section of this specification according to various exemplary implementations of the present application.

[0092] The storage unit 420 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 421 and / or a cache 422 , and may further include a read-only memory unit (ROM) 423 .

[0093] The storage unit 420 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0094] Bus 430 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0095] The electronic device 400 may also communicate with one or more external devices 500 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 400, and / or communicate with any device that enables the electronic device 400 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed through an I / O (input / output) interface 450, wherein the I / O interface 450 may also be connected to a display unit 440 to display the communication content through the display unit 440. In addition, the electronic device 400 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 460. As shown in the figure, the network adapter 460 communicates with other modules of the electronic device 400 through the bus 430. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0096] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0098] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0099] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-On l yMemory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc., which can store program code.

[0100] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. An electronic expansion valve control method, characterized in that: Applied to an air conditioning system of a vehicle, the electronic expansion valve has a first side and a second side arranged opposite to each other, and the method comprises: When the air conditioning system is turned off, obtaining a current position of the electronic expansion valve; If the current position is different from the first target position, the electronic expansion valve is controlled to move to the first target position at a preset speed, wherein the preset speed is less than or equal to a speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

2. The method according to claim 1, characterized in that The controlling the electronic expansion valve to move to the first target position at a preset speed includes: The electronic expansion valve is controlled to maintain the current position for a first time period and then move to the first target position at the preset speed.

3. The method according to claim 1, characterized in that Before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes: Detecting a vehicle locking signal of the vehicle; If the vehicle locking signal is not detected, the step of controlling the electronic expansion valve to move to the first target position at a preset speed is performed.

4. The method according to claim 1, characterized in that: Before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes: Detecting a vehicle locking signal of the vehicle; If the vehicle locking signal is not detected, the electronic expansion valve is maintained at the current position, and the step of controlling the electronic expansion valve to move to the first target position at a preset speed is not performed.

5. The method according to claim 1, characterized in that The air conditioning system includes a refrigerant and a compressor, the electronic expansion valve is used to adjust the flow of the refrigerant, and when controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes: If the air-conditioning system is started and the compressor is started before the electronic expansion valve reaches the first target position, when it reaches the first target position, or a second time after it reaches the first target position, the electronic expansion valve is controlled to move to the second target position; wherein, when the electronic expansion valve is at the third target position, the refrigerant has not reached the compressor, and the third target position is the first target position, or a position between the current position and the first target position.

6. The method according to claim 4, characterized in that The air conditioning system includes a refrigerant and a compressor, the electronic expansion valve is used to adjust the flow of the refrigerant, and after maintaining the electronic expansion valve at the current position, the method further includes: If the air conditioning system is started and the compressor is started, the electronic expansion valve is controlled to move to a second target position, wherein when the electronic expansion valve is located at the current position, the refrigerant does not reach the compressor.

7. The method according to any one of claims 1 to 6, characterized in that: The first target position is located at a middle position of a total stroke of the electronic expansion valve.

8. An electronic expansion valve control device, characterized in that: Applied to a vehicle air conditioning system, the electronic expansion valve has a first side and a second side arranged opposite to each other, and the device comprises: an acquisition unit, configured to acquire a current position of the electronic expansion valve when the air conditioning system is turned off; A control unit, used for controlling the electronic expansion valve to move to the first target position at a preset speed if the current position is different from the first target position, wherein the preset speed is less than or equal to a speed threshold, and there is a positive correlation between the preset speed and the pressure difference change rate, and the pressure difference change rate is the rate of change of the pressure difference between the first side and the second side during the movement of the electronic expansion valve; when the electronic expansion valve reaches the first target position, the pressure difference between the first side and the second side is less than or equal to the preset difference.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one computer program instruction, and the at least one computer program instruction is loaded and executed by a processor to implement the operations performed by any one of the methods according to claims 1-7.

10. A vehicle, characterized in that: It comprises a controller and an air conditioning system, wherein the air conditioning system is provided with an electronic expansion valve, the electronic expansion valve is communicatively connected with the controller, and the controller is used to perform the operations performed by any of the methods described in claims 1-7.

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