Initialization method, device and vehicle for electronic expansion valve

Abstract

The application provides an initialization method and device of an electronic expansion valve and a vehicle. The method comprises the following steps: obtaining a power-off state of the electronic expansion valve, wherein the power-off state at least comprises a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off when the electronic expansion valve is at a minimum opening degree; in the case that the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than a maximum opening degree of the electronic expansion valve. The method solves the problem that the service life is reduced due to a long initialization time in the prior art.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic expansion valves, in particular to an initialization method and device of an electronic expansion valve, a computer readable storage medium, a processor and a vehicle. BACKGROUND

[0002] In a vehicle system, an electronic expansion valve is used in a refrigeration system to regulate refrigerant flow. It includes a stepper motor which is driven by a controller. Since the electronic expansion valve adopts open-loop control, the current state and opening position of the valve body are not confirmed in the initial stage. Therefore, when the electronic expansion valve is used for flow control, the electronic expansion valve needs to be driven back to the completely closed position. This process of returning to the closed position is called initialization. When the electronic expansion valve continuously runs in the closed position, it will emit a "ticking" sound, which is the sound emitted by the spring hitting the stop coil. A long closed time during initialization will result in loud noise and also easily cause the spring and valve needle to be repeatedly compressed, reducing the service life and other phenomena.

[0003] The above information disclosed in the background section is only used to enhance the understanding of the background of the technology described herein, therefore, the background section can include certain information which is not known to those skilled in the art as prior art in the country. SUMMARY

[0004] The main purpose of the present application is to provide an initialization method and device of an electronic expansion valve, a computer readable storage medium, a processor and a vehicle, to solve the problem of reduced service life caused by long initialization time in the prior art.

[0005] According to an aspect of an embodiment of the present application, an initialization method of an electronic expansion valve is provided, comprising: obtaining a power-off state of the electronic expansion valve, the power-off state at least including a normal power-off state, the normal power-off state being a state in which the electronic expansion valve is powered off when at a minimum opening degree; in the case where the power-off state is the normal power-off state, controlling the opening degree of the electronic expansion valve to decrease by a first predetermined opening degree, the first predetermined opening degree being smaller than a maximum opening degree of the electronic expansion valve.

[0006] Optionally, the power-off state further includes an abnormal power-off state, the electronic expansion valve not being powered off when not at the minimum opening degree. After obtaining the power-off state of the electronic expansion valve, the method further comprises: in the case where the power-off state is the abnormal power-off state, controlling the opening degree of the electronic expansion valve to decrease by a second predetermined opening degree, the second predetermined opening degree being greater than the maximum opening degree.

[0007] Optionally, before obtaining the power-off state of the electronic expansion valve, the method comprises: in the case that a power-off instruction is received, controlling the opening degree of the electronic expansion valve to reduce to the minimum opening degree and controlling the electronic expansion valve to be powered off, marking the power-off state as the normal power-off state; in the case that the opening degree of the electronic expansion valve does not reduce to the minimum opening degree and the electronic expansion valve is powered off, marking the power-off state as the abnormal power-off state.

[0008] Optionally, the controlling the electronic expansion valve to be powered off comprises: in the case that a power-off instruction is received, delaying for a predetermined time and then controlling the electronic expansion valve to be powered off.

[0009] Optionally, the first predetermined opening degree is 5% to 15% of the maximum opening degree.

[0010] Optionally, the second predetermined opening degree is 105% to 115% of the maximum opening degree.

[0011] According to another aspect of the embodiments of the present application, there is also provided an initialization device of an electronic expansion valve, comprising: an obtaining unit configured to obtain a power-off state of the electronic expansion valve, the power-off state comprising at least a normal power-off state, the normal power-off state being a state in which the electronic expansion valve is powered off when the opening degree is the minimum opening degree; and a first control unit configured to, in the case that the power-off state is the normal power-off state, control the opening degree of the electronic expansion valve to reduce by a first predetermined opening degree, the first predetermined opening degree being smaller than the maximum opening degree of the electronic expansion valve.

[0012] According to still another aspect of the embodiments of the present application, there is also provided a computer readable storage medium, the computer readable storage medium comprising a stored program, wherein the program performs any of the methods.

[0013] According to yet another aspect of the embodiments of the present application, there is also provided a processor configured to execute a program, wherein the program performs any of the methods when executed.

[0014] According to still another aspect of the embodiments of the present application, there is also provided a vehicle, comprising: an electronic expansion valve, one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs comprise instructions for performing any of the methods.

[0015] In the initialization method of the electronic expansion valve, first, a power-off state of the electronic expansion valve is obtained, the power-off state at least includes a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off when the minimum opening degree is reached. Then, in the case where the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than the maximum opening degree of the electronic expansion valve. The method determines whether the electronic expansion valve is normally powered off by obtaining the power-off state of the electronic expansion valve, so that in the case where the electronic expansion valve is normally powered off, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the initialization is completed so that the electronic expansion valve is closed. Compared with the prior art, the opening degree of the electronic expansion valve is controlled to decrease by the maximum opening degree in any case, and the electronic expansion valve is ensured to be closed. The method reduces the size of the opening degree during the initialization process, that is, reduces the number of initialization steps and reduces the initialization time, thereby reducing the noise generated by repeated compression of the spring and the valve needle, improving the service life of the electronic expansion valve, and solving the problem of reduced service life caused by long initialization time in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the application and are incorporated herein in conjunction with the description of the application. The embodiments of the present application, and their

[0017] Figure 1 A flow chart of an initialization method of an electronic expansion valve according to an embodiment of the present application is shown;

[0018] Figure 2 A power-on and power-off timing diagram of an electronic expansion valve according to an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of an initialization device of an electronic expansion valve according to an embodiment of the present application is shown;

[0020] Figure 4 A flow chart of an initialization method of an electronic expansion valve according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0022] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application, so that those skilled in the art can better understand the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should be within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0024] It should be understood that when an element (such as a layer, film, region, or substrate) is described as "on" another element, it can be directly on the other element, or there can be an intermediate element. Also, in the specification and claims, when an element is described as "connected to" another element, it can be "directly connected to" the other element, or "connected to" the other element through a third element.

[0025] As mentioned in the background, the long initialization time in the prior art leads to reduced service life. In order to solve the above problems, in a typical embodiment of the present application, an initialization method, device, computer readable storage medium, processor and vehicle of an electronic expansion valve are provided.

[0026] According to an embodiment of the present application, an initialization method of an electronic expansion valve is provided.

[0027] Figure 1 is a flowchart of the initialization method of the electronic expansion valve according to the embodiment of the present application. As shown in Figure 1 , the method comprises the following steps:

[0028] In step S101, the power-off state of the electronic expansion valve is obtained, and the power-off state at least includes a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off at the minimum opening degree;

[0029] In a case where the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than the maximum opening degree of the electronic expansion valve.

[0030] In the initialization method of the electronic expansion valve, first, a power-off state of the electronic expansion valve is acquired, and the power-off state at least includes a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off when the electronic expansion valve is at the minimum opening degree; then, in a case where the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than the maximum opening degree of the electronic expansion valve. The method determines whether the electronic expansion valve is normally powered off by acquiring the power-off state of the electronic expansion valve, so that in a case where the electronic expansion valve is normally powered off, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and initialization is completed so that the electronic expansion valve is closed. Compared with the prior art in which the opening degree of the electronic expansion valve is controlled to decrease by the maximum opening degree in any case, the electronic expansion valve is ensured to be closed. The method reduces the size of the opening degree in the initialization process, that is, reduces the initialization steps and reduces the initialization time, thereby reducing the noise generated by repeated compression of the spring and the valve needle, improving the service life of the electronic expansion valve, and solving the problem of reduced service life caused by long initialization time in the prior art.

[0031] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0032] In an embodiment of the present application, the power-off state further includes an abnormal power-off state, and the electronic expansion valve is not powered off when the electronic expansion valve is at the minimum opening degree. After acquiring the power-off state of the electronic expansion valve, the method further includes: in a case where the power-off state is the abnormal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a second predetermined opening degree, and the second predetermined opening degree is greater than the maximum opening degree. Specifically, the second predetermined opening degree is greater than the maximum opening degree, and the opening degree of the electronic expansion valve is controlled to decrease by the second predetermined opening degree, so that the electronic expansion valve can be closed regardless of the position of the valve needle of the electronic expansion valve.

[0033] In an embodiment of the present application, before obtaining the power-off state of the electronic expansion valve, the method comprises: in the case of receiving a power-off instruction, controlling the opening degree of the electronic expansion valve to reduce to the minimum opening degree and controlling the electronic expansion valve to be powered off, marking the power-off state as the normal power-off state; in the case that the opening degree of the electronic expansion valve does not reduce to the minimum opening degree and the electronic expansion valve is powered off, marking the power-off state as the abnormal power-off state. Specifically, as shown in Figure 2 IgnitionStatus is the power-off instruction state, EXV_SupplyVoltage is the 12V power supply state of the electronic expansion valve, and EXV_CurrentPosition is the opening degree position of the electronic expansion valve. When the vehicle normally powers off, the VCU needs to send a power-off instruction to the electronic expansion valve EXV. After the electronic expansion valve EXV receives the power-off instruction, it directly runs from the current position to the closed position, and then stores a mark as a normal power-off state. The opening degree of the electronic expansion valve does not reduce to the minimum opening degree, and is directly powered off, and then stores a mark as an abnormal power-off state. Figure 2

[0034] In an embodiment of the present application, the control of the electronic expansion valve to be powered off comprises: in the case of receiving a power-off instruction, delaying for a predetermined time and then controlling the electronic expansion valve to be powered off. Specifically, as shown in Figure 2 VCU needs to delay for more than 6S after sending a power-off instruction and then be powered off, so as to ensure that the electronic expansion valve completes the closing action.

[0035] In an embodiment of the present application, the first predetermined opening degree is 5% to 15% of the maximum opening degree. Specifically, even if the electronic expansion valve is closed when powered off, the electronic expansion valve may not be tightly closed due to vibration during use. Therefore, the electronic expansion valve needs to reduce the first predetermined opening degree when normally powered off. The first predetermined opening degree is determined according to the actual situation, that is, the opening degree caused by vibration. Preferably, the first predetermined opening degree is 10% of the maximum opening degree.

[0036] In an embodiment of the present application, the second predetermined opening degree is 105% to 115% of the maximum opening degree. Specifically, there may be an error between the manufactured electronic expansion valve and the set maximum opening degree. For example, the set maximum opening degree is 500 steps, and the electronic expansion valve may be 520 steps. Therefore, the second predetermined opening degree is 105% to 115% of the maximum opening degree, so as to ensure that the electronic expansion valve is closed even in the above case.

[0037] ​The embodiment of the present application further provides an initialization device of an electronic expansion valve. It should be noted that the initialization device of the electronic expansion valve in the embodiment of the present application can be used to execute the initialization method for the electronic expansion valve provided by the embodiment of the present application. The initialization device of the electronic expansion valve provided by the embodiment of the present application is introduced as follows.

[0038] Figure 3 is a schematic diagram of the initialization device of the electronic expansion valve according to the embodiment of the present application. As shown in the figure, Figure 3 the device comprises:

[0039] an acquisition unit 10, configured to acquire a power-off state of the electronic expansion valve, wherein the power-off state at least comprises a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off when the electronic expansion valve is at a minimum opening degree.

[0040] a first control unit 20, configured to, in a case where the power-off state is the normal power-off state, control the opening degree of the electronic expansion valve to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than a maximum opening degree of the electronic expansion valve.

[0041] In the initialization device of the electronic expansion valve, the acquisition unit acquires the power-off state of the electronic expansion valve, wherein the power-off state at least comprises a normal power-off state, and the normal power-off state is a state in which the electronic expansion valve is powered off when the electronic expansion valve is at a minimum opening degree; and the control unit, in a case where the power-off state is the normal power-off state, controls the opening degree of the electronic expansion valve to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than a maximum opening degree of the electronic expansion valve. The device determines whether the electronic expansion valve is normally powered off by acquiring the power-off state of the electronic expansion valve, so that, in a case where the electronic expansion valve is normally powered off, the opening degree of the electronic expansion valve is controlled to decrease by the first predetermined opening degree, initialization is completed, and the electronic expansion valve is closed. Compared with the prior art in which the opening degree of the electronic expansion valve is controlled to decrease by the maximum opening degree in any case, the electronic expansion valve is ensured to be closed, the size of the opening degree in the initialization process is reduced, that is, the number of initialization steps is reduced, the initialization time is reduced, noise generated by repeated compression of a spring and a valve needle is reduced, the service life of the electronic expansion valve is prolonged, and the problem of reduced service life caused by long initialization time in the prior art is solved.

[0042] In an embodiment of the present application, the power-off state further includes an abnormal power-off state, the electronic expansion valve is not powered off when the opening degree is at the minimum opening degree, the device further includes a second control unit, and the second control unit is configured to, after obtaining the power-off state of the electronic expansion valve, control the opening degree of the electronic expansion valve to decrease by a second predetermined opening degree in a case where the power-off state is the abnormal power-off state, the second predetermined opening degree being greater than the maximum opening degree. Specifically, the second predetermined opening degree is greater than the maximum opening degree, and the opening degree of the electronic expansion valve is controlled to decrease by the second predetermined opening degree, so that the electronic expansion valve can be closed regardless of the position of the valve needle of the electronic expansion valve.

[0043] In an embodiment of the present application, the device includes a marking unit, the marking unit includes a first marking module and a second marking module, the first marking module is configured to, before obtaining the power-off state of the electronic expansion valve, control the opening degree of the electronic expansion valve to decrease to the minimum opening degree and control the electronic expansion valve to be powered off in a case where a power-off instruction is received, and mark the power-off state as the normal power-off state, and the second marking module is configured to, before obtaining the power-off state of the electronic expansion valve, mark the power-off state as the abnormal power-off state in a case where the opening degree of the electronic expansion valve does not decrease to the minimum opening degree and the electronic expansion valve is powered off. Figure 2 As shown in FIG. 6, IgnitionStatus is a power-off instruction state, EXV_SupplyVoltage is a 12V power supply state of the electronic expansion valve, and EXV_CurrentPosition is an opening degree position of the electronic expansion valve. Figure 2 When the vehicle normally powers off, the VCU needs to send a power-off instruction to the electronic expansion valve EXV, the electronic expansion valve EXV receives the power-off instruction, and then directly runs from the current position to the closed position, and then stores a mark as a normal power-off state. The opening degree of the electronic expansion valve does not decrease to the minimum opening degree, and the electronic expansion valve is directly powered off, and then stores a mark as an abnormal power-off state.

[0044] In an embodiment of the present application, the first marking module includes a control submodule, and the control submodule is configured to, in a case where the power-off instruction is received, control the electronic expansion valve to be powered off after a delay of a predetermined time. Specifically, as shown in FIG. 7, the VCU needs to be powered off after a delay of 6S or more after sending the power-off instruction, so as to ensure that the electronic expansion valve completes the closing action. Figure 2

[0045] ​In one embodiment of this application, the first predetermined opening is 5% to 15% of the maximum opening. Specifically, even if the electronic expansion valve is closed when powered off, it may not close completely due to vibration during use. Therefore, the first predetermined opening needs to be reduced even when the electronic expansion valve is powered off normally. The value of the first predetermined opening is determined based on the actual situation and the degree of loosening caused by vibration. Preferably, the first predetermined opening is 10% of the maximum opening.

[0046] In one embodiment of this application, the second predetermined opening degree is 105% to 115% of the maximum opening degree. Specifically, since the manufactured electronic expansion valve may have an error compared to the set maximum opening degree, for example, if the set maximum opening degree is 500 steps, the electronic expansion valve may be 520 steps. Therefore, even if the above situation occurs, the electronic expansion valve can be ensured to be closed by setting the second predetermined opening degree to 105% to 115% of the maximum opening degree.

[0047] Example 1

[0048] like Figure 4 As shown, the initialization method of the electronic expansion valve in this embodiment includes the following steps:

[0049] When the vehicle experiences a normal power failure, the VCU needs to send a power-down command to the EXV. Upon receiving the command, the EXV immediately moves from its current position to the 0 position (minimum opening), then stores the flag as a normal power failure. The VCU must delay for at least 6 seconds after sending the command before disconnecting the power. After a normal power failure, upon power-up, the EXV recognizes the "normal power failure" flag and clears it. It then begins initialization from step 50, returning the electronic expansion valve to the 0 or closed position. If the power failure is abnormal, the initialization process executes step 550.

[0050] The initialization device for the aforementioned electronic expansion valve includes a processor and a memory. The aforementioned acquisition unit and the first control unit are all stored in the memory as program units, and the processor executes the aforementioned program units stored in the memory to realize the corresponding functions.

[0051] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the problem of long initialization times leading to reduced lifespan in existing technologies.

[0052] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0053] The embodiment of the present application provides a storage medium, which stores a program, and the program is executed by a processor to realize the method.

[0054] The embodiment of the present application provides a processor, which is used for running a program, wherein the program is executed to perform the method.

[0055] The embodiment of the present application provides a vehicle, which comprises an electronic expansion valve, one or more processors, a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the processor executes the program to realize at least the following steps:

[0056] In step S101, a power-off state of the electronic expansion valve is acquired, and the power-off state at least comprises a normal power-off state, and the normal power-off state is a state that the electronic expansion valve is powered off when the electronic expansion valve is at a minimum opening degree.

[0057] In step S102, when the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than a maximum opening degree of the electronic expansion valve.

[0058] The present application also provides a computer program product, which is suitable for executing the program of at least the following method steps when executed on a data processing device:

[0059] In step S101, a power-off state of the electronic expansion valve is acquired, and the power-off state at least comprises a normal power-off state, and the normal power-off state is a state that the electronic expansion valve is powered off when the electronic expansion valve is at a minimum opening degree.

[0060] In step S102, when the power-off state is the normal power-off state, the opening degree of the electronic expansion valve is controlled to decrease by a first predetermined opening degree, and the first predetermined opening degree is smaller than a maximum opening degree of the electronic expansion valve.

[0061] In the above embodiment of the present application, the description of each embodiment has its own emphasis, and the part not described in detail in an embodiment can be referred to the related description of other embodiments.

[0062] In several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented by other manners. Among them, the above-described device embodiments are only illustrative, for example, the division of the above-mentioned units can be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units or modules shown or discussed can be indirect coupling or communication connection between the units or modules through some interfaces, and can be electrical or other forms.

[0063] The units described above as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed to multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0064] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0065] The integrated unit described above, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part of the prior art that makes a contribution or the whole or part of the technical solutions can be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions for making a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the above-mentioned method of each embodiment of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various program code storage media.

[0066] From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:

[0067] 1)、the initialization method of the electronic expansion valve of the application, first, the power-down state of the electronic expansion valve is obtained, the power-down state at least includes normal power-down state, the normal power-down state is the state of power-off when the electronic expansion valve is at the minimum opening; then, in the case of the power-down state being the normal power-down state, the opening of the electronic expansion valve is controlled to decrease by a first predetermined opening, the first predetermined opening is smaller than the maximum opening of the electronic expansion valve. The method determines whether the electronic expansion valve is normally powered down by obtaining the power-down state of the electronic expansion valve, so that in the case of the electronic expansion valve normally powered down, the opening of the electronic expansion valve is controlled to decrease by a first predetermined opening, initialization is completed so that the electronic expansion valve is closed, compared with the prior art, the opening of the electronic expansion valve is controlled to decrease by the maximum opening in any case, ensuring that the electronic expansion valve is closed, the method reduces the size of the opening decrease in the initialization process, that is, reduces the initialization steps and reduces the initialization time, thereby reducing the noise generated by the repeated compression of the spring and the valve needle, improving the service life of the electronic expansion valve, and solving the problem of reduced service life caused by long initialization time in the prior art.

[0068] 2)、the initialization device of the electronic expansion valve of the application, the acquisition unit acquires the power-down state of the electronic expansion valve, the power-down state at least includes normal power-down state, the normal power-down state is the state of power-off when the electronic expansion valve is at the minimum opening; the control unit controls the opening of the electronic expansion valve to decrease by a first predetermined opening in the case of the power-down state being the normal power-down state, the first predetermined opening is smaller than the maximum opening of the electronic expansion valve. The device determines whether the electronic expansion valve is normally powered down by obtaining the power-down state of the electronic expansion valve, so that in the case of the electronic expansion valve normally powered down, the opening of the electronic expansion valve is controlled to decrease by a first predetermined opening, initialization is completed so that the electronic expansion valve is closed, compared with the prior art, the opening of the electronic expansion valve is controlled to decrease by the maximum opening in any case, ensuring that the electronic expansion valve is closed, the method reduces the size of the opening decrease in the initialization process, that is, reduces the initialization steps and reduces the initialization time, thereby reducing the noise generated by the repeated compression of the spring and the valve needle, improving the service life of the electronic expansion valve, and solving the problem of reduced service life caused by long initialization time in the prior art.

[0069] The above is only the preferred embodiment of the application and is not intended to limit the application. Those skilled in the art can make various changes and modifications to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. An initialization method for an electronic expansion valve, characterized in that, include: The power-off state of the electronic expansion valve is obtained, and the power-off state includes at least the normal power-off state, which is the state in which the electronic expansion valve is de-energized when it is at its minimum opening. When the power-down state is the normal power-down state, the opening of the electronic expansion valve is reduced by a first predetermined opening, which is less than the maximum opening of the electronic expansion valve. The power-down state also includes an abnormal power-down state, where the electronic expansion valve is not in the power-off state at the minimum opening. After obtaining the power-down state of the electronic expansion valve, the method further includes: when the power-down state is the abnormal power-down state, controlling the opening of the electronic expansion valve to decrease by a second predetermined opening, where the second predetermined opening is greater than the maximum opening. Before obtaining the power-down state of the electronic expansion valve, the method includes: upon receiving a power-down command, controlling the opening of the electronic expansion valve to decrease to the minimum opening and controlling the electronic expansion valve to de-energize, marking the power-down state as the normal power-down state; and if the opening of the electronic expansion valve does not decrease to the minimum opening and the electronic expansion valve is de-energized, marking the power-down state as the abnormal power-down state.

2. The method according to claim 1, characterized in that, Controlling the de-energization of the electronic expansion valve includes: Upon receiving a power-down command, the electronic expansion valve is de-energized after a predetermined delay.

3. The method according to claim 1, characterized in that, The first predetermined opening is 5% to 15% of the maximum opening.

4. The method according to claim 1, characterized in that, The second predetermined opening is 105% to 115% of the maximum opening.

5. An initialization device for an electronic expansion valve, characterized in that, include: The acquisition unit is used to acquire the power-off state of the electronic expansion valve, the power-off state including at least the normal power-off state, the normal power-off state being the state where the electronic expansion valve is de-energized when it is at its minimum opening; A first control unit is configured to, when the power-down state is the normal power-down state, control the opening of the electronic expansion valve to decrease by a first predetermined opening, wherein the first predetermined opening is less than the maximum opening of the electronic expansion valve. The power-down state also includes an abnormal power-down state, where the electronic expansion valve is not in the power-off state at the minimum opening. The device also includes a second control unit, which is used to control the opening of the electronic expansion valve to decrease by a second predetermined opening when the power-down state is the abnormal power-down state after acquiring the power-down state of the electronic expansion valve. The second predetermined opening is greater than the maximum opening. The device includes a marking unit, which includes a first marking module and a second marking module. The first marking module is used to, before acquiring the power-down state of the electronic expansion valve, control the opening of the electronic expansion valve to decrease to the minimum opening and control the electronic expansion valve to de-energize upon receiving a power-down command, marking the power-down state as the normal power-down state. The second marking module is used to mark the power-down state as the abnormal power-down state if the opening of the electronic expansion valve does not decrease to the minimum opening and the electronic expansion valve is de-energized.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program performs the method according to any one of claims 1 to 4.

7. A processor, characterized in that, The processor is used to run a program, wherein the program executes the method according to any one of claims 1 to 4 when it runs.

8. A vehicle, characterized in that, include: An electronic expansion valve, one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising methods for performing any one of claims 1 to 4.

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