Vehicle, electronic expansion valve control method, device and medium

Abstract

The present application discloses a vehicle, an electronic expansion valve control method, an apparatus, and a medium. The method is applied to a vehicle air conditioning system, wherein the electronic expansion valve has a first side and a second side disposed relative to each other. The method includes: when the air conditioning system is turned off, obtaining the current position of the electronic expansion valve; if the current position is different from a 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 a speed threshold, and the preset speed is positively correlated with the pressure difference change rate, which 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. The present application can slow down and discontinuously vibrate the motor of the electronic expansion valve, thereby reducing the noise generated by the motor vibration and improving the user experience.

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 both regulate the passenger compartment temperature and cool the fuel cell. To better distribute cooling capacity between the passenger compartment and the fuel cell, an electronic expansion valve is typically used to adjust the refrigerant flow rate, thereby achieving cooling capacity distribution.

[0003] Currently, during the use of the electronic expansion valve, the movement of the electronic expansion valve motor generates noise, thereby affecting the user experience. Summary of the Invention

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

[0006] In a first aspect, an embodiment of the present application provides a method for controlling an electronic expansion valve, which is applied to a vehicle air conditioning system. The electronic expansion valve has a first side and a second side disposed opposite to each other. 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 the preset speed is positively correlated with the pressure difference change rate, and the pressure difference change rate 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.

[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 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 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, and the electronic expansion valve is used to regulate the flow of the refrigerant. 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 regulate 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 the 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 a vehicle air conditioning system. The electronic expansion valve has a first side and a second side disposed opposite to each other, and the device includes:

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

[0024] a control unit, configured 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 the preset speed is positively correlated with a pressure difference change rate, wherein the pressure difference change rate is a rate of change of a pressure difference between the first side and the second side during movement of the electronic expansion valve; and 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 a 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 the 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] The 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 refrigerant flow. The method includes: 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 the preset speed is positively correlated with the pressure difference change rate, which 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. 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 position to 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 a 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.

[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 accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

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

[0033] Figure 2 A flow chart of 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 according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts 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 so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art 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, implementations 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 separate entities. That is, these functional entities may be implemented in software, 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 for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0040] It should also be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that shown or described.

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

[0042] like Figure 1As shown, the current heat pump air conditioning system for new energy vehicles includes components such as a compressor 1, a PTC (Positive Temperature Coefficient) heater 2, a pressure and temperature sensor 3, an outdoor temperature sensor 4, an outdoor heat exchanger 5, a gas-liquid separator 6, an electronic expansion valve 7, a solenoid valve 8, a heater core 9, an evaporator 10, a water-to-water heat exchanger 11, a water-cooled condenser 12, a coaxial heat exchanger 13, and a water pump 14. These components are connected by air conditioning piping. Furthermore, the air conditioning piping is also connected to a battery cooler 15. One of the electronic expansion valves 7 is located on the air conditioning piping on the side of the fuel cell cooler 15. The air conditioning system can operate in cooling mode when the ambient temperature is high, similar to the cooling mode of a traditional air conditioner, providing cool air to the passenger compartment to achieve a comfortable temperature for the human body. The heat pump air conditioning system can also operate in heating mode when the ambient temperature is low, providing heat to the passenger compartment to achieve a comfortable temperature for the human body.

[0043] Currently, the heat pump air conditioning systems of new energy vehicles not only cool the passenger compartment but also the fuel cell. Therefore, the air conditioning system needs to rationally distribute cooling capacity based on the needs of the passenger compartment and the fuel cell. To better distribute cooling capacity between the passenger compartment and the fuel cell, electronic expansion valves are typically installed in the air conditioning system (for example, on the passenger compartment evaporator, on the electronic cooler, and on the outdoor heat exchanger) to regulate refrigerant flow and achieve 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 reach a balance to ensure system safety. At present, when the air conditioning system is turned off, the opening of the electronic expansion valve is adjusted to a larger degree. For example, the total stroke of the electronic expansion valve is 600 steps. It moves from the current position (for example, 60 steps) to fully open (i.e., 600 steps). The duration of this process is about 20 seconds. During the operation of the electronic expansion valve, the motor vibrates continuously, thereby generating noise, which is commonly known as "beeping sound". When the vehicle is in a quiet environment, the user's perception of this 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, to a certain extent, make the vibration of the motor slow and discontinuous, thereby reducing the noise generated by the motor vibration and improving the user experience.

[0046] The electronic expansion valve control method according to 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 the electronic expansion valve control method according to an embodiment of the present application.

[0048] like Figure 2 As shown, in a first aspect, an embodiment of the present application provides an electronic expansion valve control method for a vehicle air conditioning system. 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. 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 is 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 degree 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 degree 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 differential between the high-pressure and low-pressure sides, and refrigerant flow rate. Specifically, it can be adjusted based on the cooling capacity distribution between 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 depending on the cooling capacity adjustment required. Typically, in order to maintain the pressure differential between the high-pressure and low-pressure sides and ensure that the refrigerant transitions from liquid 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 between 1 / 5 and 1 / 3 of the total travel distance.

[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 an air conditioning system is shut down after a period of use, it is typically necessary to release pressure on the high-pressure side of the electronic expansion valve to achieve pressure balance between the high-pressure and low-pressure sides and ensure system safety. When the air conditioning system is shut down, 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, if the total stroke of the electronic expansion valve is 600 steps, 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 differs from the first target position, the electronic expansion valve needs to be controlled to move to the first target position, thereby adjusting the opening of the electronic expansion valve to a larger value and releasing the pressure on the high-pressure side. To reduce the noise generated by motor vibration during the electronic expansion valve opening adjustment process, 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), thereby slowing down and discontinuously vibrating the motor, 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 rate of change of the pressure difference between the high-pressure side and the low-pressure side, that is, the greater the first preset speed, the greater the rate of change of the pressure difference, and the smaller the first preset speed, the smaller the rate of change of the pressure difference. 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, which 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;

[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, indicating that the user has not yet left the vehicle, the noise generated by the vibration of the electronic expansion valve motor is likely to be perceived by the user, leading to user complaints. Based on this, the embodiment of the present application controls the electronic expansion valve to move to the first target position at a preset speed when the user has not yet left the vehicle, thereby reducing the noise generated by the motor vibration and alleviating user complaints.

[0066] It is understandable that if a vehicle lock signal is detected, indicating that the user has left the vehicle, then even if the electronic expansion valve motor vibrates and generates noise, the user will not be aware of it. In this case, to improve system safety, when the air conditioner is turned off, the electronic expansion valve can be controlled to move rapidly from its current position to a first target position, thereby quickly equalizing the pressure on the high-pressure side and the low-pressure side. 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;

[0068] Step S12B'. If the vehicle lock 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 the 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 will be generated due to vibration, thereby improving the user experience.

[0070] In some embodiments, the air conditioning system includes a refrigerant and a compressor, and the electronic expansion valve is used to regulate the flow of the refrigerant. 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 vibrate abnormally during the startup of the compressor, which is commonly known as a "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 "beeping sound", but the "beeping 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 vibration of the compressor during the startup process.

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

[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 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.

[0076] In some embodiments, the air conditioning system includes a refrigerant and a compressor, and the electronic expansion valve is used to regulate the flow of the refrigerant. 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] Understandably, when the air conditioning system is turned off and then quickly turned on, the refrigerant cannot reach the compressor quickly because the electronic expansion valve is held in its current position when the air conditioning system is turned off. Therefore, when the compressor starts, the refrigerant has not yet entered the compressor, or the refrigerant entering the compressor is gaseous refrigerant on the low-pressure side. Therefore, the compressor startup does not produce abnormal jitter, and therefore no "clicking" sound occurs, thereby improving the user experience.

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

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

[0081] an acquiring unit 201, configured to acquire a 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 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.

[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 disc read-only memory (CD-ROM) and include program code, and can 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. In the present application, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction 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 any combination thereof. More specific examples of readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, 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] The program code for performing the operations of the present application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, and the like, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, as a stand-alone 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 cases involving a remote computing device, the remote computing device can 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 can 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 the operations as described in any of the methods described in the first aspect.

[0088] See also Figure 4 , which is a structural diagram of a computer system suitable for implementing an electronic device according to 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, electronic device 400 is implemented as a general-purpose computing device. Components of 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 various system components (including storage unit 420 and processing unit 410).

[0091] The storage unit stores program code, which can be executed by the processing unit 410, so that the processing unit 410 executes the steps described in the above "Example Method" section of this specification according to various exemplary embodiments 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 bus or memory 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 can also communicate with one or more external devices 500 (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 400, and / or any device that enables the electronic device 400 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). This communication can occur via an I / O (input / output) interface 450, which can also be connected to a display unit 440 for displaying the content of the communication. Furthermore, the electronic device 400 can 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) via a network adapter 460. As shown, the network adapter 460 communicates with other modules of the electronic device 400 via the bus 430. It should be understood that, although not shown in the figure, other hardware and / or software modules can 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 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, hardwiring, or a combination of any of these. Furthermore, each functional unit may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single 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 exemplary. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods, such as 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 separate, 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 across 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 is essentially 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, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0100] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A method for controlling an electronic expansion valve, characterized in that: Applied to a vehicle air conditioning system, the electronic expansion valve has a first side and a second side disposed opposite to each other, and the method includes: 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 the preset speed is positively correlated with the pressure difference change rate, and the pressure difference change rate 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.

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 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, wherein Before controlling the electronic expansion valve to move to the first target position at a preset speed, the method further includes: detecting a 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, and the electronic expansion valve is used to regulate the flow of the refrigerant. 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 disposed opposite to each other, and the device includes: an acquiring unit, configured to acquire a current position of the electronic expansion valve when the air-conditioning system is turned off; a control unit, configured 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 the preset speed is positively correlated with a pressure difference change rate, wherein the pressure difference change rate is a rate of change of a pressure difference between the first side and the second side during movement of the electronic expansion valve; and 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 a 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: The method 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 the method according to any one of claims 1 to 7.

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