CN115013940B - Installation and detection method, device, air conditioner and medium of electronic expansion valve - Google Patents

Abstract

The invention provides a method and a device for detecting the installation of an electronic expansion valve, an air conditioner and a medium, wherein the method for detecting the installation of the electronic expansion valve comprises the following steps: when the electronic expansion valve is installed in the air conditioning system; and detecting the high-low pressure ratio of the electronic expansion valve, and judging whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system according to the high-low pressure ratio so as to determine whether the installation direction of the electronic expansion valve is correct. The invention solves the problem of how to detect that the actual valve opening direction of the electronic expansion valve is consistent with the preset direction of the system.

Description

Installation and detection method, device, air conditioner and medium of electronic expansion valve

technical field

The invention relates to the technical field of air conditioners, in particular to an installation and detection method and device for an electronic expansion valve, an air conditioner and a medium.

Background technique

With the development of air conditioners, after the air conditioner is powered on and sends the electronic expansion valve control command, the compressor starts, the high and low pressures are slowly balanced, and the system operates normally. However, when the air conditioner installs and debugs the electronic expansion valve and replaces the electronic expansion valve after sales, it is often impossible to effectively control the electronic expansion valve because the actual opening direction of the new electronic expansion valve is different from that set by the system software. If the valve opening direction controlled by the software is opposite to the actual valve opening direction of the electronic expansion valve, it will cause the air conditioner to stop or be damaged.

It can be seen that how to detect that the actual valve opening direction of the electronic expansion valve is consistent with the system preset direction has become an urgent problem to be solved.

Contents of the invention

The problem solved by the invention is how to detect that the actual valve opening direction of the electronic expansion valve is consistent with the system preset direction.

In order to solve the above problems, the present invention provides a method for installing and detecting an electronic expansion valve, including: when installing an electronic expansion valve in an air-conditioning system; detecting the high and low pressure ratio of the electronic expansion valve, and judging the electronic expansion valve according to the high and low pressure ratio Check whether the actual valve opening direction is the same as the preset direction of the air conditioning system to determine whether the installation direction of the electronic expansion valve is correct.

Compared with the existing technology, the effect that this solution can achieve: In a specific embodiment, when the electronic expansion valve is normally opened, that is, when the preset direction of the air conditioning system is consistent with the actual valve opening direction of the electronic expansion valve, The low-pressure pressure in the air-conditioning system will be balanced slowly, and the high-low pressure ratio will gradually decrease until it is balanced; When the electronic expansion valve actually closes the valve, the refrigerant cannot return to the compressor in the air conditioning system at this time, making the high and low pressure ratio too high. Therefore, by detecting the value of the high and low pressure ratio after the electronic expansion valve is started , to judge whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system, and make corresponding adjustments.

In one embodiment of the present invention, when the electronic expansion valve is installed in the air conditioning system, it includes: judging whether the air conditioning system is powered on for the first time; Check whether the direction of the valve is the same as the preset direction of the air conditioning system to determine whether the installation direction of the electronic expansion valve is correct.

Compared with the existing technology, the effect that this solution can achieve: when the air-conditioning system is powered on for the first time, it means that the electronic expansion valve is also newly installed at this time, and the installation detection method in this embodiment can be directly executed at this time , so as to ensure that there will be no error in starting the electronic expansion valve for the second subsequent operation of the air conditioning system.

In one embodiment of the present invention, judging whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system according to the high and low pressure ratio includes: controlling the electronic expansion valve to act according to the first target control mode, detecting and judging Whether the high-low pressure ratio satisfies the first condition; if the judgment is no, execute the second target control mode.

Compared with the prior art, the effect achieved by this solution is: it can ensure that the electronic expansion valve operates within a certain safety range, so that the high and low pressure ratio of the electronic expansion valve can be detected and at the same time, the electronic expansion valve will not be damaged.

In one embodiment of the present invention, if it is judged that the high and low pressure ratios meet the first condition, the electronic expansion valve is controlled to act according to the third target control mode; Whether the high-low pressure ratio satisfies the second condition; if the judgment is no, execute the fourth target control mode.

Compared with the prior art, the effect achieved by this solution is: it can ensure that the electronic expansion valve operates within a certain safety range, so that the high and low pressure ratio of the electronic expansion valve can be detected and at the same time, the electronic expansion valve will not be damaged.

In an embodiment of the present invention, if it is determined that the high-low pressure ratio meets the second condition at this time, the third target control mode is stopped and an error is reported.

Compared with the existing technology, the effect that this solution can achieve: it can explain that the electronic expansion valve has failed, or the control mode in this embodiment is not compatible with the electronic expansion valve of this embodiment, so that the electronic expansion valve can be controlled Report an error and stop the test.

In one embodiment of the present invention, the first target control mode includes: controlling the electronic expansion valve to open the first preset value of steps, and running continuously for the first set time; and/or, the second target control mode includes : Control the number of steps to close the electronic expansion valve to the second preset value, and continue to run for the second preset time; and/or, the third target control mode includes: control the number of steps to open the electronic expansion valve to the third preset value , and continue to run for a third set time; and/or, the fourth target control mode includes: controlling the electronic expansion valve to close the valve for a fourth preset number of steps, and continue to run for a fourth preset time.

Compared with the prior art, the effect that this solution can achieve: in a specific embodiment, multiple target control modes can execute the installation detection method of this embodiment more accurately, so that the installation in this embodiment The results of the detection method are more accurate.

In an embodiment of the present invention, the first condition includes: the high-low pressure ratio is greater than or equal to a fifth preset value; and/or, the second condition includes: the high-low pressure ratio is greater than or equal to a sixth preset value.

Compared with the existing technology, the effect that this solution can achieve: In a specific embodiment, the fifth preset value in the first condition and the sixth preset value in the second condition are closer to the high value of the electronic expansion valve. The limit value of the low pressure ratio makes the installation detection method in this embodiment more accurate and effective.

In one embodiment of the present invention, a detection device for an air conditioner is provided, including: a detection module, which is used to detect the high and low pressure ratio of the electronic expansion valve; a judgment module, which is used to judge the actual pressure ratio of the electronic expansion valve. Whether the valve opening direction is the same as the preset direction of the air conditioning system.

Compared with the prior art, the effect achieved by this solution is: the detection device can implement the steps of the control method in any embodiment of the present invention, so it has the beneficial effects of any of the above embodiments, which will not be repeated here.

In one embodiment of the present invention, an air conditioner is provided, and the air conditioner can implement the steps of any one of the control methods in the foregoing embodiments.

Compared with the prior art, the effect that this solution can achieve: the air conditioner in this embodiment can realize the steps of any of the above control methods, so the air conditioner in this embodiment has the beneficial effects of any of the above embodiments, I won't repeat them here.

In one embodiment of the present invention, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the control method in any one of the above embodiments are implemented.

Compared with the prior art, the effect that this solution can achieve: the readable storage medium realizes the steps of the control method according to any embodiment of the present invention, so it has all the beneficial effects of the method according to any embodiment of the present invention , which will not be repeated here.

Description of drawings

Fig. 1 is a flow chart of the steps of the installation detection method of the electronic expansion valve in some embodiments;

Fig. 2 is a schematic structural diagram of the detection device.

Explanation of reference signs:

100. Detection device; 101. Detection module; 102. Judgment module.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail.

Embodiment one:

This embodiment provides an installation detection method for an electronic expansion valve, including: when an electronic expansion valve is installed in an air-conditioning system; detecting the high and low pressure ratio of the electronic expansion valve, and judging the actual opening of the electronic expansion valve according to the high and low pressure ratio Whether the direction is the same as the preset direction of the air conditioning system to determine whether the installation direction of the electronic expansion valve is correct.

In this embodiment, the preset direction of the air-conditioning system refers to the command issued by the air-conditioning system to the electronic expansion valve to open the valve or close the valve, that is, the opening of the valve is a direction, corresponding to the electronic expansion valve. The opening of the valve increases; the opening of the valve is one direction, corresponding to the opening of the electronic expansion valve decreases. Correspondingly, when the command is sent to the electronic expansion valve, the electronic expansion valve will actually open or close the valve accordingly. Once the actual opening direction of the electronic expansion valve is opposite to the preset direction of the air conditioning system, it will cause The preset direction of the air conditioning system is to increase the opening of the expansion valve, but the electronic expansion valve actually performs a valve closing action, and the opening of the electronic expansion valve decreases at this time, resulting in damage to the air conditioner.

Specifically, the electronic expansion valve is controlled by the stepping motor by adjusting the power-on sequence to control the opening and closing direction of the electronic expansion valve. direction of decrease. The installation detection method in this embodiment is specifically applicable to the electronic expansion valve controlled by a four-phase eight-step stepping motor. The electronic expansion valve controlled by a four-phase eight-step stepping motor includes two power-on sequences, of which the first one makes The power-on sequence for opening the electronic expansion valve is defined as program 1, and the second power-on sequence for opening the electronic expansion valve is defined as program 2. The air-conditioning system executes the power-on sequence for valve opening of program 1 through the stepping motor , the actual corresponding electronic expansion valve may perform valve opening operation or valve closing operation. Similarly, the air conditioning system executes the power-on sequence of valve opening in program 2 through the stepping motor, and the actual corresponding electronic expansion valve may perform valve opening operation Or close the valve operation, which will cause the actual valve opening direction of the electronic expansion valve to be different from the system preset direction.

Among them, when the electronic expansion valve is normally opened, that is, when the preset direction of the air-conditioning system is consistent with the actual opening direction of the electronic expansion valve, the low-pressure pressure in the air-conditioning system will slowly balance, and the high-low pressure ratio will gradually decrease until it is balanced; but , when the preset direction of the air conditioning system is opposite to the actual valve opening direction of the electronic expansion valve, that is, the air conditioning system issues a valve opening command, but the electronic expansion valve actually performs a valve closing operation, then the refrigerant in the air conditioning system will not be able to The flow back to the compressor makes the high and low pressure ratio too high. Therefore, by detecting the value of the high and low pressure ratio after the electronic expansion valve is started, it can be judged whether the actual valve opening direction of the electronic expansion valve is consistent with the preset direction of the air conditioning system. Similarly, it is determined whether the preset direction of the air-conditioning system needs to be adjusted, so that when the air-conditioning system issues a valve-opening command, the electronic expansion valve can correspondingly realize the valve-opening operation.

Wherein, correspondingly, this installation detection method is applicable to the detection required when the electronic expansion valve is installed in the air conditioning system, including but not limited to the debugging of the electronic expansion valve and the replacement of the electronic expansion valve.

Embodiment two:

In this embodiment, when the electronic expansion valve is installed in the air-conditioning system, it includes: judging whether the air-conditioning system is powered on for the first time; Whether the preset direction of the system is the same to determine whether the installation direction of the electronic expansion valve is correct.

In this embodiment, it is specified that when the air-conditioning system is powered on for the first time, it is necessary to detect and judge the actual opening direction of the electronic expansion valve and the preset direction of the air-conditioning system.

Among them, when the air conditioning system is powered on for the first time, it means that the electronic expansion valve is also newly installed at this time, and the installation detection method in this embodiment can be directly executed at this time, so as to ensure that the electronic expansion valve is activated for the second subsequent operation of the air conditioning system. The valve does not go wrong.

Among them, when it is judged that the air conditioning system is not powered on for the first time, it indicates that the air conditioning system has been powered on for the second time or has been powered on for several times, indicating that the air conditioning system can operate normally, and there is no need to execute this procedure at this time. The installation detection method in the embodiment.

Embodiment three:

Judging whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system according to the high and low pressure ratio, including: controlling the electronic expansion valve to operate according to the first target control mode, detecting and judging whether the high and low pressure ratio meets the first condition ; If the judgment is negative, execute the second target control mode.

In this embodiment, combined with Embodiment 1, the first target control mode corresponds to the power-on sequence of program 1, and program 1 executes the command to open the expansion valve. At this time, the electronic expansion valve may actually open the valve, and it is also possible Perform valve closing operation.

Wherein, the first condition is specifically that the high and low pressure ratio is greater than or equal to the fifth preset value, wherein the fifth preset value is a factory default value of the air conditioning system, which can be adjusted and set according to actual working conditions. Specifically, in this embodiment, when the general air conditioning system operates normally, the high and low pressure ratio will not exceed 8, therefore, in this embodiment, the fifth preset value is preferably 8.

Specifically, the first target control mode is to control the number of steps of the first preset value of the electronic expansion valve actually opening or closing the valve corresponding to the power-on sequence of program one, and the electronic expansion valve continues to run for the first set time. The first preset value and the first set time are factory default values of the air-conditioning system, and can be adjusted and set according to actual working conditions. In this embodiment, the first preset value is preferably 600, and the first setting time is preferably 30 seconds, so as to ensure that the electronic expansion valve operates within a certain safe range, so that the high and low pressure ratio of the electronic expansion valve can be detected. At the same time, the electronic expansion valve will not be damaged.

After the action of the first target control mode, detect the high and low pressure ratio of the electronic expansion valve at this time, set the detected high and low pressure ratio as the first pressure ratio, and judge whether the first pressure ratio satisfies the first condition, If the first pressure ratio does not meet the first condition, that is, the first pressure ratio is lower than the fifth preset value, it means that the air conditioning system is running normally. At this time, the power-on sequence of program one corresponding to the first target control mode Realizing the actual opening of the electronic expansion valve means that the actual opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system, and the electronic expansion valve executes the action of the second target control mode.

Specifically, the second target control mode is to record program one as the original program of the actual valve opening direction of the electronic expansion valve, and at the same time control the number of steps of the second preset value of the electronic expansion valve closing valve, and continue to run for the second preset time , and then restart the electronic expansion valve. The second preset value and the second set time are factory default values of the air conditioning system, and can be adjusted and set according to actual working conditions. The second preset value is preferably 600 in this embodiment, and the second preset time is preferably 15 seconds.

Embodiment four:

In this embodiment, if it is determined that the high and low pressure ratio meets the first condition, the electronic expansion valve is controlled to act in accordance with the third target control mode; after the third target control mode is detected, the high and low pressure ratio is judged, and the high and low pressure ratio at this time is judged Whether the second condition is satisfied; if the judgment is no, execute the fourth target control mode.

In this embodiment, in combination with Embodiment 3, the next actions to be performed by the electronic expansion valve when the high-low pressure ratio of the electronic expansion valve satisfies the first condition are specifically described.

Wherein, when the high-low pressure ratio of the electronic expansion valve satisfies the first condition, it indicates that the first pressure ratio is greater than or equal to the fifth preset value at this time, and the air-conditioning system is operating abnormally at this time, and the program corresponding to the first target control mode is The power-on sequence cannot realize the actual opening of the electronic expansion valve, which means that the actual opening direction of the electronic expansion valve is opposite to the preset direction of the air conditioning system. At this time, the electronic expansion valve will then perform the action of the third target control mode.

Specifically, in combination with Embodiment 1, the third target control mode is corresponding to the power-on sequence of program 2, and controls the number of steps of the third preset value of actually opening or closing the electronic expansion valve, and the electronic expansion valve continues to run for the third The set time, the third preset value and the third set time are factory default values of the air conditioning system, and can be adjusted and set according to actual working conditions. The third preset value is preferably 600 in this embodiment, and the third setting time is preferably 30 seconds, so as to ensure that the electronic expansion valve operates within a certain safety range, so that the high and low pressure ratio of the electronic expansion valve can be detected. At the same time, the electronic expansion valve will not be damaged.

Then detect the high and low pressure ratio of the electronic expansion valve after the action of the third target control mode, and record it as the second pressure ratio. If the second pressure ratio does not meet the second condition, the electronic expansion valve will execute the fourth target control mode .

Wherein, the second condition is specifically that the high-low pressure ratio is greater than or equal to the sixth preset value, wherein the sixth preset value is the factory default value of the air-conditioning system, which can be adjusted and set according to actual working conditions. Specifically, in this embodiment, when the general air-conditioning system is running normally, the high and low pressure ratio will not exceed 8. Therefore, in this embodiment, the sixth preset value is preferably 8.

Specifically, it is judged whether the second pressure ratio satisfies the second condition. If the second pressure ratio does not meet the second condition, that is, the second pressure ratio is lower than the sixth preset value, it indicates that the air conditioning system is operating normally. At this time, the power-on sequence of program 2 corresponding to the second target control mode can realize the actual opening of the electronic expansion valve, which means that the actual opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system.

Specifically, the fourth target control mode is the original program in which the recording program 2 is the actual valve opening direction of the electronic expansion valve, and at the same time controls the number of steps of the fourth preset value of the electronic expansion valve closing valve, and continues to run for the fourth preset time , and then restart the electronic expansion valve. The fourth preset value and the fourth set time are factory default values of the air-conditioning system, which can be adjusted and set according to actual working conditions. The fourth preset value is preferably 600 in this embodiment, and the fourth preset time is preferably 15 seconds.

Embodiment five:

In this embodiment, if it is determined that the high and low pressure ratios meet the second condition at this time, the third target control mode is stopped and an error is reported.

In this embodiment, the action that the electronic expansion valve needs to perform when the second pressure ratio satisfies the second condition is specifically described.

If the second pressure ratio satisfies the second condition, it indicates that the second pressure ratio is greater than or equal to the sixth preset value, indicating that the air conditioning system cannot operate normally at this time. At this time, the actual valve opening direction of the electronic expansion valve cannot match the first target control mode and the third target control mode, so it can be explained that the electronic expansion valve is malfunctioning, or the control mode in this embodiment is not compatible with the control mode in this embodiment. Electronic expansion valve, so as to report an error to the electronic expansion valve and stop it for detection.

Embodiment six:

The first target control mode includes: controlling the electronic expansion valve to open the first preset value of steps, and running continuously for the first set time; and/or, the second target control mode includes: controlling the electronic expansion valve to close the valve for the second time The number of steps of a preset value, and continue to run for a second preset time; and/or, the third target control mode includes: controlling the electronic expansion valve to open the valve for a third preset number of steps, and continue to run for a third set time and/or, the fourth target control mode includes: controlling the electronic expansion valve to close the valve for a fourth preset value of steps, and continue to run for a fourth preset time.

In this embodiment, actions specifically performed in the first target control mode, the second target control mode, the third target control mode, and the fourth target control mode are specifically described in conjunction with the above-mentioned embodiments.

Embodiment seven:

The first condition includes: the high-low pressure ratio is greater than or equal to a fifth preset value; and/or, the second condition includes: the high-low pressure ratio is greater than or equal to a sixth preset value.

In this embodiment, the specific content of the first condition and the second condition is specifically described in combination with the above embodiments.

Specifically, referring to Embodiment 6, referring to FIG. 1 , the specific operation flow of the installation detection method is given in detail. It starts from step S101, that is, the air conditioning system is powered on and running, and then enters step S201 to detect and judge whether the air conditioning system is powered on for the first time. It indicates that the air-conditioning system is not powered on for the first time, and has passed the factory debugging stage, and can run normally. The original program indicates that the electronic expansion valve can be adapted to perform the corresponding correct operation program, that is, the stepper motor uses the power-on sequence of the original program to run It can ensure that the actual opening and closing direction of the electronic expansion valve is the same as the preset direction.

If it is judged to be yes, that is, the air-conditioning system is powered on for the first time, then enter step S301. At this time, the air-conditioning system controls the electronic expansion valve to operate in the first target control mode. The first control target mode includes: stepping motor use program one The power-on sequence of the electronic expansion valve makes the opening of the electronic expansion valve 600 steps, and runs for 30 seconds, then enters step S401, detects and judges whether the high-low pressure ratio of the electronic expansion valve at this time meets the first condition, the first The condition is whether the high-low pressure ratio is greater than or equal to 8. In combination with Embodiment 3, that is, whether the first pressure ratio is greater than or equal to 8, if it is judged to be no, it indicates that the first pressure ratio is less than 8, and then enters step S402, the electronic expansion valve Operate in the second target control mode, the second target control mode includes: at this time, the recording program 1 is the original program, the electronic expansion valve closes the opening of the valve for 600 steps, and maintains it for 15 seconds, and then restarts the electronic expansion valve, so that the electronic expansion valve The expansion valve is working properly.

If the judgment is yes, it means that the first pressure ratio is greater than or equal to 8 at this time, and then enter step S501 at this time, and the electronic expansion valve operates in the third target control mode. The third control target mode includes: the stepper motor uses the second The power-on sequence makes the electronic expansion valve open for 600 steps and runs for 30 seconds, then enters step S601 to detect and judge whether the high-low pressure ratio of the electronic expansion valve meets the second condition, the second condition That is, whether the high-low pressure ratio is greater than or equal to 8, combined with Embodiment 4, that is, whether the second pressure ratio is greater than or equal to 8, if it is judged to be no, it indicates that the second pressure ratio is less than 8, and then enters step S602, at this time, the electron expands The valve operates in the fourth target control mode. The fourth target control mode includes: record program 2 as the original program, the electronic expansion valve closes the opening of the valve for 600 steps, and maintains it for 15 seconds, and then restarts the electronic expansion valve, so that the electronic expansion valve normal work.

If the judgment is yes, it means that the second pressure ratio is greater than or equal to 8. At this time, enter step S701, indicating that the power-on sequence of the stepper motor program 1 and program 2 is not compatible with the electronic expansion valve. At this time, it is necessary to stop and report an error, and Detect failure.

Embodiment eight:

A detection device 100 for an air conditioner is provided, including: a detection module 101, which is used to detect the high and low pressure ratio of an electronic expansion valve; a judgment module 102, which is used to judge the actual valve opening direction of the electronic expansion valve and Whether the preset direction of the air conditioning system is the same.

In this embodiment, a control module is also included, and the control module is used to control the electronic expansion valve to operate in a corresponding target control mode.

Wherein, since the detection device 100 in this embodiment can implement the installation detection method in the above-mentioned embodiments, the detection device 100 in this embodiment can realize the beneficial effects of any of the above-mentioned embodiments, and details will not be repeated here.

Embodiment nine:

This embodiment provides an air conditioner, and the air conditioner can implement the steps of any one of the control methods in the foregoing embodiments.

Since the air conditioner in this embodiment can implement the steps of any one of the control methods in the above embodiments, the air conditioner in this embodiment has the beneficial effects of any one of the above embodiments, and will not be repeated here.

Further, the air conditioners in this embodiment include but are not limited to: wall-mounted air conditioners, central air conditioners, and cabinet-type air conditioners.

Embodiment ten:

This embodiment provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the control method in any one of the above embodiments are implemented.

Wherein, the readable storage medium may be any combination of one or more readable media, and the readable medium may be a readable signal medium or a readable storage medium, and the readable storage medium may include, but not limited to, electronic, magnetic, optical, Electromagnetic, infrared, or semiconductor systems, devices, or devices, or any combination of the above. More specific examples of readable storage media include: electrical connections with one or more conductors, portable disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only memory ( EPROM or flash memory), fiber optics, portable compact disc read only memory, optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention should be based on the scope defined in the claims.

Claims (5)

1. A method for installation and detection of an electronic expansion valve, characterized in that it comprises: When installing an electronic expansion valve in an air conditioning system; Detect the high and low pressure ratio of the electronic expansion valve, and judge whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system according to the high and low pressure ratio, so as to determine the Whether the installation direction is correct; The judging whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system according to the high and low pressure ratios includes: controlling the electronic expansion valve to act according to the first target control mode, detecting and judging whether the high-low pressure ratio meets the first condition; If the judgment is negative, execute the second target control mode; If it is determined that the high-low pressure ratio satisfies the first condition, then controlling the electronic expansion valve to act in a third target control mode; Detecting the high-low pressure ratio after passing through the third target control mode, and judging whether the high-low pressure ratio satisfies the second condition at this time; If the judgment is negative, execute the fourth target control mode; If it is judged that the high-low pressure ratio meets the second condition at this time, stop the third target control mode and report an error; The first target control mode includes: Controlling the number of steps of opening the electronic expansion valve to a first preset value, and continuing to run for a first preset time; and/or, The second target control mode includes: Controlling the number of steps of closing the electronic expansion valve to a second preset value, and continuing to run for a second preset time; and/or, The third target control mode includes: Controlling the number of steps of opening the electronic expansion valve to a third preset value, and continuing to run for a third preset time; and/or, The fourth target control mode includes: Controlling the number of steps of closing the electronic expansion valve to a fourth preset value, and continuing to run for a fourth preset time; The first condition includes: the high-low pressure ratio is greater than or equal to a fifth preset value; and/or, The second condition includes: the high-low pressure ratio is greater than or equal to a sixth preset value. 2. The installation detection method according to claim 1, characterized in that, when the electronic expansion valve is installed in the air conditioning system, it includes: Judging whether the air-conditioning system is powered on for the first time; If the judgment is yes, it is judged according to the high and low pressure ratio whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system, so as to determine whether the installation direction of the electronic expansion valve is correct. 3. A detection device for an air conditioner, characterized in that the detection device adopts the installation detection method according to any one of claims 1-2; the detection device comprises: Detection module, the detection module is used to detect the high and low pressure ratio of the electronic expansion valve; A judging module, the judging module is used to judge whether the actual valve opening direction of the electronic expansion valve is the same as the preset direction of the air conditioning system. 4. An air conditioner, characterized in that the air conditioner can implement the steps of the method according to any one of claims 1-2. 5. A readable storage medium, characterized in that a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the method according to any one of claims 1-2 is implemented A step of.