Control method and device of electronic expansion valve of air conditioner, air conditioner and storage medium

Abstract

The application discloses a control method of an electronic expansion valve of an air conditioner, and the control method comprises the following steps: obtaining the indoor environment temperature of the air conditioner during the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating process; and reducing the opening degree of the electronic expansion valve of the outdoor unit of the air conditioner according to the difference between the user-set temperature and the indoor environment temperature. The application further discloses a control device of the electronic expansion valve of the air conditioner, an air conditioner and a computer storage medium. According to the difference between the user-set temperature and the indoor environment temperature, the opening degree of the electronic expansion valve of the outdoor unit is reduced when the air conditioner is in the low-temperature heating process, so that the evaporation temperature of the outdoor unit is reduced, the heating capacity of the indoor unit is improved, the indoor temperature is raised faster, and the indoor heating effect is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a control method, device, air conditioner, and storage medium for an electronic expansion valve in an air conditioner. Background Technology

[0002] When an air conditioner is heating, the electronic expansion valve of the outdoor unit usually operates at a fixed opening. However, if the electronic expansion valve of the outdoor unit is still controlled at the original fixed opening when the indoor temperature is low, the evaporation temperature of the air conditioner will be relatively high, the capacity output of the air conditioner will be low, the indoor temperature will rise slowly, and the indoor heating effect will be affected.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a control method, device, air conditioner, and storage medium for an electronic expansion valve in an air conditioner, which aims to accelerate the rise of indoor temperature and improve the indoor heating effect when the air conditioner is heating at low temperatures.

[0005] To achieve the above objectives, the present invention provides a control method for an electronic expansion valve in an air conditioner, the control method comprising the following steps:

[0006] During the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating mode, the indoor ambient temperature of the air conditioner is obtained.

[0007] Based on the difference between the user-set temperature and the indoor ambient temperature, the opening of the electronic expansion valve of the outdoor unit of the air conditioner is reduced.

[0008] Optionally, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature includes:

[0009] Obtain the target opening corresponding to the difference, wherein the target opening is negatively correlated with the difference;

[0010] Reduce the opening of the electronic expansion valve to the target opening.

[0011] Optionally, before the step of reducing the opening of the electronic expansion valve to the target opening, the method further includes:

[0012] Obtain the opening reduction rate corresponding to the difference, wherein the opening reduction rate is positively correlated with the difference;

[0013] The step of reducing the opening of the electronic expansion valve to the target opening includes:

[0014] The opening of the electronic expansion valve is reduced to the target opening according to the stated opening reduction rate.

[0015] Optionally, the step of obtaining the opening reduction rate corresponding to the difference includes:

[0016] Determine the preset difference interval in which the difference lies;

[0017] Obtain the opening reduction rate corresponding to the preset difference interval.

[0018] Optionally, after the step of obtaining the indoor ambient temperature of the air conditioner during the low-temperature heating process or when the air conditioner enters low-temperature heating mode, the control method of the air conditioner's electronic expansion valve includes:

[0019] Detect whether the difference is greater than a preset difference;

[0020] When the difference is greater than a preset difference, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature is executed.

[0021] Optionally, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature when the difference is greater than a preset difference includes:

[0022] When the difference is greater than a preset difference, the exhaust temperature of the air conditioner's compressor and the current opening degree of the electronic expansion valve are obtained;

[0023] When the exhaust temperature is lower than the preset exhaust temperature and the current opening of the electronic expansion valve is greater than the preset opening, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature is executed.

[0024] Optionally, after the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature, the method further includes:

[0025] Return to the step of obtaining the indoor ambient temperature of the air conditioner.

[0026] In addition, to achieve the above objectives, the present invention also provides a control device for an air conditioner electronic expansion valve. The control device for the air conditioner electronic expansion valve includes: a memory, a processor, and a control program for the air conditioner electronic expansion valve stored in the memory and executable on the processor. When the control program for the air conditioner electronic expansion valve is executed by the processor, it implements the steps of the control method for the air conditioner electronic expansion valve as described above.

[0027] In addition, to achieve the above objectives, the present invention also provides an air conditioner, the air conditioner including the control device for the air conditioner electronic expansion valve as described above.

[0028] In addition, to achieve the above objectives, the present invention also provides a computer storage medium storing a control program for an air conditioner electronic expansion valve, wherein when the control program for the air conditioner electronic expansion valve is executed by a processor, the control program for the air conditioner electronic expansion valve implements the steps of the control method for the air conditioner electronic expansion valve as described above.

[0029] The present invention discloses a control method, device, air conditioner, and storage medium for an air conditioner's electronic expansion valve. During low-temperature heating or when the air conditioner enters low-temperature heating mode, the indoor ambient temperature of the air conditioner is acquired. Based on the difference between the user-set temperature and the indoor ambient temperature, the opening of the electronic expansion valve of the outdoor unit of the air conditioner is reduced. In low-temperature heating mode, this invention reduces the opening of the outdoor unit's electronic expansion valve based on the difference between the user-set temperature and the indoor ambient temperature, thereby lowering the outdoor unit's evaporation temperature, increasing the indoor unit's heating capacity, accelerating the rise in indoor temperature, and improving the indoor heating effect. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiments of the present invention;

[0031] Figure 2 This is a flowchart illustrating an embodiment of the control method for the electronic expansion valve of an air conditioner according to the present invention;

[0032] Figure 3 This is a schematic flowchart of another embodiment of the control method for the electronic expansion valve of an air conditioner according to the present invention;

[0033] Figure 4 This is a flowchart illustrating another embodiment of the control method for the electronic expansion valve of an air conditioner according to the present invention.

[0034] Figure 5 This is a schematic flowchart illustrating an exemplary control method for the electronic expansion valve of an air conditioner according to the present invention.

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0037] This invention provides a solution that, when the air conditioner is heating at low temperatures, reduces the opening of the outdoor unit's electronic expansion valve based on the difference between the user-set temperature and the indoor ambient temperature, thereby lowering the outdoor unit's evaporation temperature, increasing the indoor unit's heating capacity, accelerating the rise in indoor temperature, and improving the indoor heating effect.

[0038] like Figure 1 As shown, Figure 1 This is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiments of the present invention.

[0039] In this embodiment of the invention, the terminal is a control device for the electronic expansion valve of an air conditioner.

[0040] like Figure 1 As shown, the terminal may include: a processor 1001, such as a CPU; a communication bus 1002; a user interface 1003; and a memory 1004. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard. Optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The memory 1004 may be high-speed RAM or non-volatile memory, such as a disk drive. Optionally, the memory 1004 may also be a storage device independent of the aforementioned processor 1001.

[0041] Those skilled in the art will understand that Figure 1 The terminal structure shown does not constitute a limitation on the terminal and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0042] like Figure 1 As shown, the memory 1004, which serves as a computer storage medium, may include a user interface module and a control program for the electronic expansion valve of an air conditioner.

[0043] exist Figure 1 In the terminal shown, the user interface 1003 is mainly used to connect to the client (user end) and communicate data with the client; while the processor 1001 can be used to call the control program of the air conditioner's electronic expansion valve stored in the memory 1004 and perform the following operations:

[0044] During the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating mode, the indoor ambient temperature of the air conditioner is obtained.

[0045] Based on the difference between the user-set temperature and the indoor ambient temperature, the opening of the electronic expansion valve of the outdoor unit of the air conditioner is reduced.

[0046] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0047] Obtain the target opening corresponding to the difference, wherein the target opening is negatively correlated with the difference;

[0048] Reduce the opening of the electronic expansion valve to the target opening.

[0049] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0050] Obtain the opening reduction rate corresponding to the difference, wherein the opening reduction rate is positively correlated with the difference;

[0051] The step of reducing the opening of the electronic expansion valve to the target opening includes:

[0052] The opening of the electronic expansion valve is reduced to the target opening according to the stated opening reduction rate.

[0053] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0054] Determine the preset difference interval in which the difference lies;

[0055] Obtain the opening reduction rate corresponding to the preset difference interval.

[0056] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0057] Detect whether the difference is greater than a preset difference;

[0058] When the difference is greater than a preset difference, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature is executed.

[0059] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0060] When the difference is greater than a preset difference, the exhaust temperature of the air conditioner's compressor and the current opening degree of the electronic expansion valve are obtained;

[0061] When the exhaust temperature is lower than the preset exhaust temperature and the current opening of the electronic expansion valve is greater than the preset opening, the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature is executed.

[0062] Furthermore, the processor 1001 can call the control program for the air conditioner's electronic expansion valve stored in the memory 1004, and also perform the following operations:

[0063] Return to the step of obtaining the indoor ambient temperature of the air conditioner.

[0064] Reference Figure 2 In one embodiment, the control method for the electronic expansion valve of an air conditioner includes the following steps:

[0065] Step S10: During the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating mode, obtain the indoor ambient temperature of the air conditioner.

[0066] In this embodiment, when the air conditioner is in heating mode, if the outdoor ambient temperature is detected to be lower than the first preset ambient temperature and the indoor ambient temperature of the air conditioner is lower than the second preset ambient temperature, it is determined that the air conditioner is in low-temperature heating mode, and it is considered that the air conditioner has entered low-temperature heating mode or is in the process of low-temperature heating mode. At this time, the indoor ambient temperature of the air conditioner is obtained to detect the degree of indoor heating demand.

[0067] Step S20: Based on the difference between the user-set temperature and the indoor ambient temperature, reduce the opening of the electronic expansion valve of the outdoor unit of the air conditioner.

[0068] In this embodiment, since the indoor ambient temperature is generally low when the air conditioner is heating, while the user-set temperature is generally high, the difference between the user-set temperature and the indoor ambient temperature can be calculated. Based on the difference, the amount of reduction in the opening of the electronic expansion valve of the outdoor unit can be determined. When the opening of the electronic expansion valve of the outdoor unit is smaller, the evaporation temperature of the outdoor unit becomes lower, and the heating capacity of the indoor unit increases accordingly. This allows the indoor temperature to rise more quickly under the action of the indoor unit, thereby improving the indoor heating effect.

[0069] Optionally, the difference between the user-set temperature and the indoor ambient temperature represents the degree of indoor heating demand. The greater the difference, the greater the indoor heating demand, and the more the opening of the outdoor unit's electronic expansion valve needs to be reduced to improve the indoor heating effect.

[0070] Optionally, the target opening degree and / or opening degree reduction rate corresponding to the difference can be obtained, and the opening degree of the outdoor unit's electronic expansion valve can be reduced according to the target opening degree and / or opening degree reduction rate, wherein the target opening degree is negatively correlated with the difference, and the opening degree reduction rate is positively correlated with the difference.

[0071] Optionally, after reducing the opening of the electronic expansion valve of the outdoor unit, the exhaust temperature of the compressor and the opening of the electronic expansion valve of the outdoor unit will also change accordingly. Therefore, it is also possible to detect whether the exhaust temperature of the compressor is less than the exhaust temperature threshold and / or detect whether the opening is greater than the preset opening. If the exhaust temperature is less than the exhaust temperature threshold and / or the opening is greater than the preset opening, the process can return to step S10. Otherwise, the process will not return to step S10 to avoid the exhaust temperature of the compressor being too high and / or the opening of the electronic expansion valve of the outdoor unit being too small, which would affect the stability of the air conditioner. The exhaust temperature threshold is greater than the preset exhaust temperature.

[0072] In the technical solution disclosed in this embodiment, when the air conditioner is heating at a low temperature, the opening of the outdoor unit's electronic expansion valve is reduced according to the difference between the user-set temperature and the indoor ambient temperature, so as to reduce the outdoor unit's evaporation temperature, improve the indoor unit's heating capacity, accelerate the rise of the indoor temperature, and improve the indoor heating effect.

[0073] In another embodiment, such as Figure 3 As shown above, in the above Figure 2 Based on the illustrated embodiment, step S20 includes:

[0074] Step S21: Obtain the target opening corresponding to the difference, wherein the target opening is negatively correlated with the difference;

[0075] In this embodiment, when the user sets the temperature and the difference between the indoor ambient temperature to reduce the opening of the outdoor unit's electronic expansion valve, the target opening corresponding to the difference can be obtained. The larger the difference, the greater the indoor heating demand, and the smaller the corresponding target opening is set, so that the improvement of indoor heating effect matches the indoor heating demand and improves the comfort of indoor users.

[0076] Optionally, multiple preset difference intervals and preset openings corresponding to the preset difference intervals are preset, the preset difference interval in which the difference is located is determined, and the preset opening corresponding to the preset difference interval in which the difference is located is taken as the corresponding target opening.

[0077] Step S22: Reduce the opening of the electronic expansion valve to the target opening.

[0078] In this embodiment, after determining the target opening degree, the opening degree of the electronic expansion valve is reduced to the target opening degree to accelerate the rise of indoor temperature and improve the indoor heating effect.

[0079] Optionally, before reducing the opening of the electronic expansion valve to the target opening, a corresponding opening reduction rate can be determined so that the opening of the outdoor unit's electronic expansion valve is reduced to the target opening according to the corresponding opening reduction rate.

[0080] Optionally, the opening reduction rate can be determined based on the difference between the user-set temperature and the indoor ambient temperature. For example, multiple preset difference ranges and preset rates corresponding to the preset difference ranges can be preset. The preset difference range in which the difference lies can be determined, and the preset rate corresponding to the preset difference range in which the difference lies can be used as the corresponding opening reduction rate.

[0081] Optionally, the rate of decrease in opening is positively correlated with the difference. The larger the difference, the greater the indoor heating demand. Therefore, a larger rate of decrease in opening is needed to reduce the opening of the outdoor unit's electronic expansion valve in order to raise the outdoor temperature more quickly and meet the low-temperature heating needs of indoor users as soon as possible.

[0082] In the technical solution disclosed in this embodiment, the target opening degree corresponding to the difference is obtained, and the opening degree of the outdoor unit's electronic expansion valve is reduced to the target opening degree, so that the indoor unit's heating capacity is better matched with the indoor heating demand, accelerating the rise of indoor temperature and improving the indoor heating effect.

[0083] In yet another embodiment, such as Figure 4 As shown, in Figures 2 to 3 Based on any embodiment shown, after step S10, the method further includes:

[0084] Step S30: Detect whether the difference is greater than a preset difference;

[0085] Step S40: When the difference is greater than a preset difference, perform the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature.

[0086] In this embodiment, after detecting that the air conditioner is heating at a low temperature and obtaining the indoor ambient temperature, it can also detect whether the difference between the user-set temperature and the indoor ambient temperature is greater than a preset difference. If the difference is greater than the preset difference, it indicates that the indoor heating demand is large. Therefore, it can execute the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner according to the difference between the user-set temperature and the indoor ambient temperature, so that the heating capacity of the indoor unit matches the heating demand.

[0087] Optionally, if the difference is less than or equal to the preset difference, it indicates that the indoor heating demand is small and the indoor environment is very close to the user's ideal environment. Therefore, the opening of the outdoor unit's electronic expansion valve does not need to be reduced based on the difference between the user's set temperature and the indoor ambient temperature. For example, when the difference is less than or equal to the preset difference, the opening of the outdoor unit's electronic expansion valve can be kept unchanged to avoid over-adjustment of the outdoor unit's electronic expansion valve opening.

[0088] Optionally, when the difference between the user-set temperature and the indoor ambient temperature is detected to be greater than a preset difference, the compressor's exhaust temperature and the current opening of the outdoor unit's electronic expansion valve can be further detected. Based on the exhaust temperature and the current opening, it can be determined whether the opening of the outdoor unit's electronic expansion valve can be reduced. If it is determined that the opening of the outdoor unit's electronic expansion valve can be reduced, the step of reducing the opening of the indoor unit's electronic expansion valve will be executed. If it is determined that the opening of the outdoor unit's electronic expansion valve cannot be reduced, the step of reducing the opening of the outdoor unit's electronic expansion valve will not be executed, so as to avoid the exhaust temperature being too high or the opening of the outdoor unit's electronic expansion valve being too small after reducing the opening of the outdoor unit's electronic expansion valve.

[0089] Optionally, when the exhaust temperature is lower than the preset exhaust temperature and the current opening of the outdoor unit's electronic expansion valve is greater than the preset opening, it is determined that the opening of the outdoor unit's electronic expansion valve can be reduced; however, when the exhaust temperature is greater than or equal to the preset exhaust temperature, or when the current opening of the outdoor unit's electronic expansion valve is less than or equal to the preset opening, it is determined that the opening of the outdoor unit's electronic expansion valve cannot be reduced.

[0090] Optionally, after reducing the opening of the electronic expansion valve of the outdoor unit, the process can return to step S10 to re-detect whether the difference between the user-set temperature and the indoor ambient temperature is greater than a preset difference, thereby realizing cyclic control of the opening of the electronic expansion valve of the outdoor unit based on the difference between the user-set temperature and the indoor ambient temperature.

[0091] In the technical solution disclosed in this embodiment, the opening of the electronic expansion valve of the outdoor unit of the air conditioner is reduced only when the difference between the user-set temperature and the indoor ambient temperature is greater than a preset difference, so as to improve the heating capacity of the indoor unit when the indoor heating demand is large and meet the user's rapid heating demand.

[0092] In an exemplary description, such as Figure 5 As shown, in Figures 2 to 4 Based on any of the embodiments shown, the control method of the electronic expansion valve of the air conditioner is exemplified as follows:

[0093] Step S1: In heating mode, record TS, T1, T4, and TP. (TS is the user-set temperature, freely set by the user using the remote control (16℃~30℃); T1 is the indoor ambient temperature, generally taken as the return air temperature of the air conditioner, set at the return air vent; T4 is the outdoor ambient temperature, generally set at the return air outlet of the outdoor unit; TP is the compressor exhaust temperature, generally set at the surface of the copper pipe exiting the compressor's exhaust port. These temperatures are all obtained through temperature sensors.)

[0094] Step S2: Determine whether T1 B and T4 < C and TP ≤ D - 2 are true (threshold A can be 0℃ to 20℃, here 20℃ can be selected; threshold B can be 0℃ to 10℃, here 0.5℃ can be selected; threshold C can be 2℃ to 5℃, here 5℃ can be selected; threshold D can be 70℃ to 90℃, here 85℃ can be selected). If true, proceed to step S3; if false, return to step S1.

[0095] Step S3: Record the current valve opening degree L.

[0096] Step S4: Determine if L < 80 steps is true. If not, proceed to step S5; otherwise, return to step S3. (A minimum valve opening is set here, mainly considering the valve's operating range. Below 80 steps, the valve's flow accuracy decreases, the flow becomes unstable, and it is not suitable for adjustment.)

[0097] Step S5: Correct the current target valve opening as follows:

[0098] When TS-T1 ≥ 10℃, reduce the opening to L1 at a rate of X1.

[0099] When 6℃≤TS-T1<9℃, reduce the opening to L2 at a rate of X2.

[0100] When 3℃≤TS-T1<5℃, reduce the opening to L3 at a rate of X3.

[0101] When 0.5℃ < TS-T1 ≤ 2℃, reduce the opening to L4 at a rate of X4.

[0102] (Here, X1 > X2 > X3 > X4 can be selected between 2 steps per minute and 10 steps per minute. Here, we select (5 steps per minute, 3 steps per minute, 2 steps per minute, and 1 step per minute) as piecewise functions. The connection between the piecewise functions is a linear function relationship with a certain slope. The corresponding opening change curves also form linear functions with different slopes.)

[0103] L1, L2, L3, and L4 are preset through experimental testing. Different models have different values, with a selectable range of 80 to 300 steps. Here, we select (100 steps, 120 steps, 150 steps, and 170 steps) respectively. The main selection method is based on the size of the indoor demand load. For example, if the difference between TS and T1 is large, it means that the indoor demand load is larger, and the corresponding opening should be smaller. This ensures that the air conditioner's capacity output is greater and can meet the indoor demand load more quickly, and vice versa.

[0104] Step S6: After correcting the opening degree of the electric valve, determine whether TS-T1≤0.5℃ is valid. If it is valid, proceed to step S8; otherwise, proceed to step S7.

[0105] Step S7: Determine if TP≥D or L≤80 is true. If not, return to step 5; if true, proceed to step 8. (The exhaust threshold defined here is to prevent excessive exhaust from causing frequency reduction and affecting output capacity; the opening threshold is explained as above.)

[0106] Step S8: Maintain the current opening of the outdoor unit's electronic expansion valve, i.e., adapt to the current indoor load demand at the optimal opening.

[0107] Wherein, TS is the user-set temperature, T1 is the indoor ambient temperature, T4 is the outdoor ambient temperature, TP is the exhaust temperature, A, B, C, and D are preset thresholds, L is the opening degree of the electronic expansion valve, L1 to L4 are the preset thresholds for the opening degree of the electronic expansion valve, and X1 to X4 are the rate of change of the electronic expansion valve.

[0108] In this exemplary description, during the low-temperature heating process, the outdoor temperature is generally below 5 degrees Celsius, and the corresponding indoor temperature has dropped to around 5 degrees Celsius. Since the initial room temperature is low, if the air conditioner's valve operates at its original setting, the evaporation temperature will be relatively high, resulting in lower capacity output and energy efficiency. This prevents the air conditioner from fully utilizing its capacity and efficiency. In the user's home, due to the low air conditioner output and low air outlet temperature, the indoor temperature rises slowly. Experiments show that after 10 minutes of operation, the indoor air temperature rises only to about 10 degrees Celsius, and after 60 minutes, it only reaches about 20 degrees Celsius. Users do not feel warm, severely impacting the user experience. Therefore, the valve control method proposed in this example detects the indoor, outdoor, and set temperatures, makes appropriate judgments, and then adjusts the settings based on the room temperature and its changes. Under different environments and needs, different valve change rates and valve openings are set to maximize the air conditioner's capacity, thereby improving energy efficiency, accelerating the rise in room temperature, and ultimately enhancing the user experience.

[0109] Furthermore, this invention also proposes a control device for an air conditioner electronic expansion valve. The control device includes a memory, a processor, and a control program for the air conditioner electronic expansion valve stored in the memory and executable on the processor. When the control program for the air conditioner electronic expansion valve is executed by the processor, it implements the steps of the control method for the air conditioner electronic expansion valve as described in the above embodiments.

[0110] Furthermore, this invention also proposes an air conditioner, which includes a control device for the electronic expansion valve of the air conditioner as described in the above embodiments.

[0111] Furthermore, this invention also proposes a computer storage medium storing a control program for an air conditioner's electronic expansion valve. When the control program for the air conditioner's electronic expansion valve is executed by a processor, it implements the steps of the control method for the air conditioner's electronic expansion valve as described in the above embodiments.

[0112] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0113] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0114] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0115] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an electronic expansion valve in an air conditioner, characterized in that, The control method for the electronic expansion valve of the air conditioner includes the following steps: When the air conditioner is in heating mode, if the outdoor ambient temperature is detected to be lower than the first preset ambient temperature and the indoor ambient temperature is lower than the second preset ambient temperature, it is determined that the air conditioner is in the process of low-temperature heating or the air conditioner has entered low-temperature heating mode. During the low-temperature heating process of the air conditioner or when the air conditioner enters the low-temperature heating mode, the indoor ambient temperature of the air conditioner is obtained. When the difference between the user-set temperature and the indoor ambient temperature is greater than a preset difference, the exhaust temperature of the air conditioner's compressor and the current opening degree of the electronic expansion valve are obtained. When the exhaust temperature is lower than the preset exhaust temperature and the current opening of the electronic expansion valve is greater than the preset opening, the opening of the electronic expansion valve of the outdoor unit of the air conditioner is reduced according to the difference between the user-set temperature and the indoor ambient temperature. The step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature includes: The difference is matched with each preset difference interval to determine the target difference interval; Obtain the target opening degree corresponding to the target difference range, wherein the difference is used to characterize the degree of indoor heating demand, different preset difference ranges correspond to different opening degrees, and the target opening degree is negatively correlated with the difference; Reduce the opening of the electronic expansion valve to the target opening.

2. The control method for the electronic expansion valve of an air conditioner as described in claim 1, characterized in that, Before the step of reducing the opening of the electronic expansion valve to the target opening, the method further includes: Obtain the opening reduction rate corresponding to the difference, wherein the opening reduction rate is positively correlated with the difference; The step of reducing the opening of the electronic expansion valve to the target opening includes: The opening of the electronic expansion valve is reduced to the target opening according to the stated opening reduction rate.

3. The control method for the electronic expansion valve of an air conditioner as described in claim 2, characterized in that, The step of obtaining the opening reduction rate corresponding to the difference includes: Determine the preset difference interval in which the difference lies; Obtain the opening reduction rate corresponding to the preset difference interval.

4. The control method for the electronic expansion valve of an air conditioner as described in claim 1, characterized in that, After the step of reducing the opening of the electronic expansion valve of the outdoor unit of the air conditioner based on the difference between the user-set temperature and the indoor ambient temperature, the method further includes: Return to the step of obtaining the indoor ambient temperature of the air conditioner.

5. A control device for an electronic expansion valve of an air conditioner, characterized in that, The control device for the air conditioner electronic expansion valve includes: a memory, a processor, and a control program for the air conditioner electronic expansion valve stored in the memory and executable on the processor. When the control program for the air conditioner electronic expansion valve is executed by the processor, it implements the steps of the control method for the air conditioner electronic expansion valve as described in any one of claims 1 to 4.

6. An air conditioner, characterized in that, The air conditioner includes the control device for the electronic expansion valve of the air conditioner as described in claim 5.

7. A computer storage medium, characterized in that, The computer storage medium stores a control program for an air conditioner's electronic expansion valve. When the control program for the air conditioner's electronic expansion valve is executed by the processor, it implements the steps of the control method for the air conditioner's electronic expansion valve as described in any one of claims 1 to 4.

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