Air conditioner control method, air conditioner and computer storage medium

Abstract

The present invention discloses a method for controlling an air conditioner, comprising the following steps: after a defrost cycle of the air conditioner ends, obtaining defrost parameters of the air conditioner during the defrost cycle, wherein the defrost cycle includes a heating phase and a defrost phase, and the defrost parameters include heating parameters during the heating phase and defrost parameters during the defrost phase; and adjusting the opening of an electronic expansion valve of an outdoor unit of the air conditioner based on the defrost parameters. The present invention also discloses an air conditioner and a computer storage medium. After a defrost cycle of the air conditioner ends, the present invention detects whether there is an error in the air conditioner's power output based on the heating parameters and defrost parameters during a single defrost cycle, and adjusts the opening of the outdoor unit's electronic expansion valve accordingly, thereby correcting the air conditioner's power output and improving the air conditioner's low-temperature heating effect.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a control method of an air conditioner, an air conditioner and a computer storage medium. Background Art

[0002] When the air conditioner is heating at low temperature, the electronic expansion valve of the outdoor unit usually operates at a fixed opening that is set in advance. However, due to certain errors in the manufacturing process or production assembly of the electronic expansion valve, the actual refrigerant flow corresponding to the original fixed opening changes. There is a deviation between the actual capacity output of the air conditioner and the expectation, which affects the low-temperature heating effect in the room.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to provide a control method for an air conditioner, an air conditioner and a computer storage medium, aiming to correct the error in the air conditioner's power output and improve the low-temperature heating effect of the air conditioner.

[0005] To achieve the above object, the present invention provides a method for controlling an air conditioner, the method comprising the following steps:

[0006] After the defrost cycle of the air conditioner ends, obtaining defrost parameters of the air conditioner in the defrost cycle, wherein the defrost cycle includes a heating stage and a defrost stage, and the defrost parameters include heating parameters of the heating stage and defrost parameters of the defrost stage;

[0007] The opening degree of the electronic expansion valve of the outdoor unit of the air conditioner is adjusted according to the defrost parameter.

[0008] Optionally, the step of adjusting the opening of the electronic expansion valve of the outdoor unit of the air conditioner according to the defrost parameter includes:

[0009] determining whether the flow of the electronic expansion valve is abnormal according to the defrost parameter;

[0010] When it is determined that the flow rate of the electronic expansion valve is abnormal, obtaining the outdoor ambient temperature;

[0011] The opening of the electronic expansion valve is adjusted according to the outdoor ambient temperature.

[0012] Optionally, the step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes:

[0013] Determine the preset temperature range in which the outdoor ambient temperature falls;

[0014] Obtaining an opening adjustment value corresponding to the preset temperature range, wherein the opening adjustment value is positively correlated with the outdoor ambient temperature;

[0015] The opening of the electronic expansion valve is adjusted according to the opening adjustment value.

[0016] Optionally, the step of judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter includes:

[0017] Determine whether the defrost parameter is within a preset parameter range, wherein:

[0018] When the defrost parameter is not within the preset parameter range, determining that the flow rate of the electronic expansion valve is abnormal;

[0019] When the defrost parameter is within the preset parameter range, it is determined that the flow rate of the electronic expansion valve is normal.

[0020] Optionally, the defrost parameter includes a maximum exhaust temperature of the air conditioner during the defrost cycle, and the step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes:

[0021] When the maximum exhaust temperature is greater than the maximum value of the preset parameter range, increasing the opening of the electronic expansion valve according to the outdoor ambient temperature;

[0022] When the maximum exhaust temperature is less than a minimum value of the preset parameter range, the opening of the electronic expansion valve is reduced according to the outdoor ambient temperature.

[0023] Optionally, the defrost parameter includes the duration of the defrost cycle, and the step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes:

[0024] When the duration is longer than the maximum value of the preset parameter interval, reducing the opening of the electronic expansion valve according to the outdoor ambient temperature;

[0025] When the duration is less than a minimum value of the preset parameter interval, the opening of the electronic expansion valve is increased according to the outdoor ambient temperature.

[0026] Optionally, after the step of obtaining the defrost parameters of the air conditioner during the defrost cycle after the defrost cycle of the air conditioner ends, the method for controlling the air conditioner further includes:

[0027] determining whether the air conditioner is in a normal operating state according to the defrost parameters;

[0028] When the air conditioner is in a normal operating state, the step of judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter is performed.

[0029] Optionally, after the step of judging whether the air conditioner is in a normal operating state according to the defrost parameters, the method further includes:

[0030] When the air conditioner is not in a normal operating state, increasing the opening of the electronic expansion valve;

[0031] Return to the step of obtaining the defrost parameters of the air conditioner during the defrost cycle after the defrost cycle of the air conditioner ends.

[0032] Optionally, the defrost parameters include a maximum exhaust temperature of the air conditioner during the defrost cycle, a maximum indoor coil temperature of the air conditioner during the defrost cycle, and a maximum operating current of an outdoor unit of the air conditioner during the defrost cycle. The step of determining whether the air conditioner is in a normal operating state based on the defrost parameters includes:

[0033] Determining whether the maximum exhaust temperature is less than an exhaust temperature threshold, determining whether the maximum indoor coil temperature is less than a coil temperature threshold, and determining whether the maximum operating current is less than an operating current threshold, wherein:

[0034] When the maximum exhaust temperature is less than an exhaust temperature threshold, the maximum indoor coil temperature is less than a coil temperature threshold, and the maximum operating current is less than an operating current threshold, determining that the air conditioner is in a normal operating state;

[0035] When the maximum exhaust temperature is greater than or equal to the exhaust temperature threshold, or the maximum indoor coil temperature is greater than or equal to the coil temperature threshold, or the maximum operating current is greater than or equal to the operating current threshold, it is determined that the air conditioner is not in normal operating state.

[0036] In addition, to achieve the above-mentioned purpose, the present invention also provides an air conditioner, which includes: a memory, a processor, and an air conditioner control program stored on the memory and runnable on the processor. When the air conditioner control program is executed by the processor, the steps of the air conditioner control method described in any one of the above are implemented.

[0037] In addition, to achieve the above-mentioned purpose, the present invention also provides a computer storage medium, on which a control program of an air conditioner is stored. When the control program of the air conditioner is executed by a processor, the steps of the control method of the air conditioner as described above are implemented.

[0038] Embodiments of the present invention provide an air conditioner control method, air conditioner, and computer storage medium. After a defrost cycle of the air conditioner ends, defrost parameters of the air conditioner during the defrost cycle are obtained. The defrost cycle includes a heating phase and a defrost phase, and the defrost parameters include heating parameters for the heating phase and defrost parameters for the defrost phase. The air conditioner's outdoor unit's electronic expansion valve opening is adjusted based on the defrost parameters. After a defrost cycle ends, the present invention detects whether there is an error in the air conditioner's power output based on the heating and defrost parameters within a single defrost cycle, adjusts the opening of the outdoor unit's electronic expansion valve accordingly, and corrects the air conditioner's power output to improve the air conditioner's low-temperature heating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present invention;

[0040] Figure 2 A flow chart of an embodiment of a method for controlling an air conditioner according to the present invention;

[0041] Figure 3 A flow chart of another embodiment of a method for controlling an air conditioner according to the present invention;

[0042] Figure 4 1 is a flow chart of another embodiment of a method for controlling an air conditioner according to the present invention;

[0043] Figure 5 The figure is a flowchart illustrating an exemplary method for controlling an air conditioner according to the present invention.

[0044] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] An embodiment of the present invention provides a solution. After the defrost cycle of the air conditioner is completed, the air conditioner's capacity output is detected based on the heating parameters and defrost parameters within a single defrost cycle to determine whether there is an error. The opening of the outdoor unit's electronic expansion valve is adjusted accordingly to correct the air conditioner's capacity output and improve the low-temperature heating effect of the air conditioner.

[0047] like Figure 1 As shown, Figure 1 It is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present invention.

[0048] The terminal in the embodiment of the present invention is an air conditioner.

[0049] 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 implement connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and optionally the user interface 1003 may also include a standard wired interface and a wireless interface. The memory 1004 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1004 may optionally also be a storage device independent of the aforementioned processor 1001.

[0050] Those skilled in the art will understand that Figure 1 The terminal structure shown in the figure does not constitute a limitation to the terminal, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0051] like Figure 1 As shown, the memory 1004 as a computer storage medium may include a user interface module and a control program for the air conditioner.

[0052] 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; and the processor 1001 can be used to call the air conditioner control program stored in the memory 1004 and perform the following operations:

[0053] After the defrost cycle of the air conditioner ends, obtaining defrost parameters of the air conditioner in the defrost cycle, wherein the defrost cycle includes a heating stage and a defrost stage, and the defrost parameters include heating parameters of the heating stage and defrost parameters of the defrost stage;

[0054] The opening degree of the electronic expansion valve of the outdoor unit of the air conditioner is adjusted according to the defrost parameter.

[0055] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0056] determining whether the flow of the electronic expansion valve is abnormal according to the defrost parameter;

[0057] When it is determined that the flow rate of the electronic expansion valve is abnormal, obtaining the outdoor ambient temperature;

[0058] The opening of the electronic expansion valve is adjusted according to the outdoor ambient temperature.

[0059] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0060] Determine the preset temperature range in which the outdoor ambient temperature falls;

[0061] Obtaining an opening adjustment value corresponding to the preset temperature range, wherein the opening adjustment value is positively correlated with the outdoor ambient temperature;

[0062] The opening of the electronic expansion valve is adjusted according to the opening adjustment value.

[0063] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0064] Determine whether the defrost parameter is within a preset parameter range, wherein:

[0065] When the defrost parameter is not within the preset parameter range, determining that the flow rate of the electronic expansion valve is abnormal;

[0066] When the defrost parameter is within the preset parameter range, it is determined that the flow rate of the electronic expansion valve is normal.

[0067] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0068] When the maximum exhaust temperature is greater than the maximum value of the preset parameter range, increasing the opening of the electronic expansion valve according to the outdoor ambient temperature;

[0069] When the maximum exhaust temperature is less than a minimum value of the preset parameter range, the opening of the electronic expansion valve is reduced according to the outdoor ambient temperature.

[0070] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0071] When the duration is longer than the maximum value of the preset parameter interval, reducing the opening of the electronic expansion valve according to the outdoor ambient temperature;

[0072] When the duration is less than a minimum value of the preset parameter interval, the opening of the electronic expansion valve is increased according to the outdoor ambient temperature.

[0073] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0074] determining whether the air conditioner is in a normal operating state according to the defrost parameters;

[0075] When the air conditioner is in a normal operating state, the step of judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter is performed.

[0076] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0077] When the air conditioner is not in a normal operating state, increasing the opening of the electronic expansion valve;

[0078] Return to the step of obtaining the defrost parameters of the air conditioner during the defrost cycle after the defrost cycle of the air conditioner ends.

[0079] Furthermore, the processor 1001 may call the control program of the air conditioner stored in the memory 1004 and perform the following operations:

[0080] Determining whether the maximum exhaust temperature is less than an exhaust temperature threshold, determining whether the maximum indoor coil temperature is less than a coil temperature threshold, and determining whether the maximum operating current is less than an operating current threshold, wherein:

[0081] When the maximum exhaust temperature is less than an exhaust temperature threshold, the maximum indoor coil temperature is less than a coil temperature threshold, and the maximum operating current is less than an operating current threshold, determining that the air conditioner is in a normal operating state;

[0082] When the maximum exhaust temperature is greater than or equal to the exhaust temperature threshold, or the maximum indoor coil temperature is greater than or equal to the coil temperature threshold, or the maximum operating current is greater than or equal to the operating current threshold, it is determined that the air conditioner is not in normal operating state.

[0083] Reference Figure 2 In one embodiment, the method for controlling an air conditioner includes the following steps:

[0084] Step S10, after the defrost cycle of the air conditioner ends, obtaining defrost parameters of the air conditioner during the defrost cycle, wherein the defrost cycle includes a heating stage and a defrost stage, and the defrost parameters include heating parameters of the heating stage and defrost parameters of the defrost stage;

[0085] In this embodiment, when the air conditioner is operating in low-temperature heating mode, frost may form on the outdoor unit. Therefore, the air conditioner needs to periodically defrost to continue normal low-temperature heating. A single defrost cycle of the air conditioner includes a heating phase and a defrost phase following the heating phase. While the air conditioner is in a defrost cycle, operating parameters of the defrost cycle are recorded. The operating parameters of the defrost cycle include operating parameters of the heating phase and operating parameters of the defrost phase. Therefore, after the single defrost cycle of the air conditioner ends, the defrost parameters of the air conditioner in the single defrost cycle can be obtained. The defrost parameters include heating parameters of the heating phase and defrost parameters of the defrost phase.

[0086] Optionally, when the air conditioner is heating at a low temperature, the air conditioner is generally changed from a heating mode to a cooling mode to melt the frost on the outdoor unit to achieve the purpose of defrosting.

[0087] Optionally, since the refrigerant system is not in a stable state when the air conditioner just starts running, the defrost parameters within the single defrost cycle obtained after the air conditioner has started may not be accurate. In order to avoid misadjustment of the outdoor unit electronic expansion valve, the defrost parameters obtained in this embodiment are the defrost parameters within the second defrost cycle after the air conditioner is started, that is, after the second defrost cycle after the air conditioner is started ends, the defrost parameters of the air conditioner in the second defrost cycle are obtained.

[0088] Optionally, the defrost parameters of the air conditioner may include at least one of the maximum exhaust temperature of the air conditioner in a single defrost cycle, the maximum indoor coil temperature of the air conditioner in a single defrost cycle, the maximum operating current of the outdoor unit of the air conditioner in a single defrost cycle, and the duration of a single defrost cycle, wherein the duration of a single defrost cycle can be obtained by adding the duration of the heating stage and the duration of the defrost stage in the defrost cycle.

[0089] Step S20: adjusting the opening of the electronic expansion valve of the outdoor unit of the air conditioner according to the defrost parameter.

[0090] In this embodiment, since the frosting of the air conditioner will make the working condition of the air conditioner worse and deviate from the ideal working condition, the defrost parameters of the air conditioner in a single defrost cycle are more likely to exceed the normal defrost parameter range. The defrost parameters of the air conditioner in a single defrost cycle are more likely to reflect the error in the air conditioner capacity output caused by the error in the manufacturing process or production assembly of the outdoor unit electronic expansion valve. Therefore, the opening error of the air conditioner capacity output can be detected based on the defrost parameters, and the opening of the outdoor unit electronic expansion valve can be adjusted accordingly. The capacity output of the air conditioner can be changed by adjusting the opening of the outdoor unit electronic expansion valve to match the actual capacity output of the air conditioner with the expected capacity output.

[0091] Optionally, a normal parameter range corresponding to each parameter in the defrost parameters is pre-set, and whether the capacity output of the air conditioner is abnormal is detected based on whether each parameter in the defrost parameters is in the corresponding normal parameter range. In case of abnormality, the opening of the outdoor unit electronic expansion valve is adjusted accordingly to make the capacity output of the air conditioner more accurate.

[0092] Optionally, when adjusting the opening of the outdoor unit electronic expansion valve, it is possible to determine whether to increase or decrease the opening of the outdoor unit electronic expansion valve based on whether the various parameters in the defrost parameters are greater than or less than the corresponding normal parameter range, and to determine the increase or decrease in the opening of the outdoor unit electronic expansion valve based on the gap between the various parameters in the defrost parameters and the corresponding normal parameter range, so that the actual capacity output of the air conditioner matches the expectations.

[0093] In the technical solution disclosed in this embodiment, after the defrost cycle of the air conditioner is completed, the heating parameters and defrost parameters within a single defrost cycle are used to detect whether there is an error in the capacity output of the air conditioner, and the opening of the outdoor unit electronic expansion valve is adjusted accordingly to correct the capacity output of the air conditioner to improve the low-temperature heating effect of the air conditioner.

[0094] In another embodiment, if Figure 3 As shown in the above Figure 2 Based on the embodiment shown, step S20 includes:

[0095] Step S21, judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter;

[0096] In this embodiment, when adjusting the opening of the outdoor unit's electronic expansion valve according to the defrost temperature, it is possible to first determine whether the flow of the electronic expansion valve is abnormal based on the defrost parameters. When it is determined that the flow of the electronic expansion valve is abnormal, it is considered that there is an error in the output capacity of the air conditioner, and the opening of the outdoor unit's electronic expansion valve can be adjusted. When it is determined that the flow of the electronic expansion valve is normal, it is considered that there is no error in the output capacity of the air conditioner, and the opening of the outdoor unit's electronic expansion valve does not need to be adjusted.

[0097] Optionally, when judging whether the flow of the electronic expansion valve is abnormal based on the defrost parameters, it can be determined based on whether the defrost parameters are in the corresponding preset parameter range, where the preset parameter range is the normal parameter range of the defrost parameters. For example, when the defrost parameters are not in the corresponding preset parameter range, the flow of the electronic expansion valve is judged to be abnormal; when the defrost parameters are in the corresponding preset parameter range, the flow of the electronic expansion valve is judged to be normal.

[0098] Optionally, the defrost parameters may include a maximum exhaust temperature of the air conditioner in a single defrost cycle or a duration of a single defrost cycle, and the maximum exhaust temperature and the duration respectively correspond to different preset parameter intervals.

[0099] Step S22, when it is determined that the flow rate of the electronic expansion valve is abnormal, obtaining the outdoor ambient temperature;

[0100] Step S23: adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature.

[0101] In this embodiment, since the defrost of the outdoor unit is mainly related to the outdoor ambient temperature, the outdoor ambient temperature will affect the capacity output of the outdoor unit. Therefore, when determining that the flow of the electronic expansion valve is abnormal, the outdoor ambient temperature can be obtained, and the adjustment range of the opening of the outdoor unit's electronic expansion valve can be determined according to the outdoor ambient temperature to correspondingly correct the capacity output of the air conditioner.

[0102] Optionally, when adjusting the opening of the outdoor unit electronic expansion valve according to the outdoor ambient temperature, the preset temperature range of the outdoor ambient temperature can be determined, and the opening adjustment value corresponding to the preset temperature range can be obtained to adjust the opening of the outdoor unit electronic expansion valve according to the opening adjustment value.

[0103] Optionally, when the outdoor ambient temperature is higher, the heat release effect of the outdoor unit is worse when the air conditioner defrosts, so the opening degree of the electronic expansion valve is adjusted more, that is, the opening adjustment value is positively correlated with the outdoor ambient temperature.

[0104] Optionally, when adjusting the opening of the outdoor unit electronic expansion valve according to the outdoor ambient temperature, if the defrost parameters include the maximum exhaust temperature of the air conditioner in a single defrost cycle, it can be determined whether to increase or decrease the opening of the outdoor unit electronic expansion valve based on the exhaust temperature and the corresponding preset parameter interval. For example, when the maximum exhaust temperature is greater than the maximum value of the preset parameter interval, the opening of the electronic expansion valve can be increased according to the outdoor ambient temperature to lower the maximum exhaust temperature and return to the preset parameter interval. When the maximum exhaust temperature is less than the minimum value of the preset parameter interval, the opening of the electronic expansion valve can be reduced according to the outdoor ambient temperature to increase the maximum exhaust temperature and return to the preset parameter interval.

[0105] Optionally, when adjusting the opening of the outdoor unit electronic expansion valve according to the outdoor ambient temperature, if the defrost parameters include the duration of a single defrost cycle, it can be determined whether to increase or decrease the opening of the outdoor unit electronic expansion valve based on the duration and the corresponding preset parameter interval. For example, when the duration is greater than the maximum value of the preset parameter interval, the opening of the electronic expansion valve can be reduced according to the outdoor ambient temperature to reduce the duration and return to the preset parameter interval. When the duration is less than the minimum value of the preset parameter interval, the opening of the electronic expansion valve can be increased according to the outdoor ambient temperature to increase the duration and return to the preset parameter interval.

[0106] In the technical solution disclosed in this embodiment, whether the flow of the electronic expansion valve is abnormal is determined based on the defrost parameters. When the flow of the electronic expansion valve is determined to be abnormal, the opening of the outdoor unit electronic expansion valve is adjusted according to the outdoor ambient temperature to correct the capacity output of the air conditioner and improve the low-temperature heating effect of the air conditioner.

[0107] In yet another embodiment, Figure 4 As shown, in Figure 3 Based on the embodiment shown, after step S10, the following steps are further included:

[0108] Step S30, judging whether the air conditioner is in a normal operating state according to the defrost parameters;

[0109] Step S31 , when the air conditioner is in a normal operating state, executing the step of determining whether the flow of the electronic expansion valve is abnormal according to the defrost parameter.

[0110] In this embodiment, after obtaining the defrost parameters, it is possible to first determine whether the air conditioner is in normal operation based on the defrost parameters. When the air conditioner is in normal operation, it is then determined whether the flow of the electronic expansion valve is abnormal based on the defrost parameters. When the air conditioner is not in normal state, the step of determining whether the flow of the electronic expansion valve is abnormal based on the defrost parameters is not performed to avoid the abnormal state of the air conditioner affecting the accuracy of the correction of the air conditioner capacity output.

[0111] Optionally, when it is determined that the air conditioner is not in normal operation, the opening of the outdoor unit's electronic expansion valve may be increased to adjust the air conditioner's state. Optionally, after increasing the opening of the electronic expansion valve, the control loop may be returned to executing the steps of obtaining defrost parameters of the air conditioner during the defrost cycle after the air conditioner has completed, and the subsequent steps, so as to return the air conditioner to normal operation.

[0112] Optionally, the defrost parameter includes at least one of a maximum exhaust temperature of the air conditioner during a defrost cycle, a maximum indoor coil temperature of the air conditioner during a defrost cycle, and a maximum operating current of an outdoor unit of the air conditioner during a defrost cycle.

[0113] Optionally, when judging whether the air conditioner is in normal operation according to the defrost parameters, the judgment can be made based on at least one of the maximum exhaust temperature, the maximum indoor coil temperature and the maximum operating current, for example, judging whether the maximum exhaust temperature is less than the exhaust temperature threshold, judging whether the maximum indoor coil temperature is less than the coil temperature threshold and judging whether the maximum operating current is less than the operating current threshold, wherein when the maximum exhaust temperature is less than the exhaust temperature threshold, the maximum indoor coil temperature is less than the coil temperature threshold, and the maximum operating current is less than the operating current threshold, the air conditioner is judged to be in normal operation; and when the maximum exhaust temperature is greater than or equal to the exhaust temperature threshold, or the maximum indoor coil temperature is greater than or equal to the coil temperature threshold, or the maximum operating current is greater than or equal to the operating current threshold, the air conditioner is judged to be not in normal operation.

[0114] In the technical solution disclosed in this embodiment, before determining whether the flow of the electronic expansion valve is abnormal, it is first determined whether the air conditioner is in normal operation, so that when the flow of the electronic expansion valve is abnormal, the correction of the opening of the outdoor unit electronic expansion valve is more accurate, thereby improving the low-temperature heating effect of the air conditioner.

[0115] In an exemplary embodiment, Figure 5 As shown, in Figures 2 to 4 Based on any of the embodiments, an example of a method for controlling an air conditioner is as follows:

[0116] Step S1: After turning on the heating mode, record T1 and T4. (T1 is the indoor ambient temperature, usually the return air temperature of the air conditioner, set at the return air outlet; T4 is the outdoor ambient temperature, usually set at the return air outlet of the outdoor unit)

[0117] Step S2: Determine whether 18℃<T1<22℃ and T4<5℃ is established (when 18℃<T1<22℃ and T4<5℃, the air conditioner is in the same environment as the previous test, and the correction of the air conditioner capacity output is more accurate). If so, go to step S3; if not, return to step S1.

[0118] Step S3: Record the maximum TP or defrost cycle duration S, maximum T2, maximum current A, and target opening Lt of the second defrost cycle.

[0119] (The defrost cycle can be determined by the power off and on of the four-way valve on the electric control. A complete cycle is from the last power off to the next power off.

[0120] The second cycle is extracted here mainly because the first cycle is relatively unstable, while the second cycle is relatively stable. The maximum exhaust temperature is extracted mainly because the outdoor machine will frost at low temperatures. As the machine frosts, the exhaust will drop unsteadily, while the maximum exhaust temperature will remain stable for a period of time.

[0121] The defrost cycle duration is obtained by the electronic control by calculating the time interval from the last power failure to the next power failure of the four-way valve;

[0122] The maximum T2 and the maximum current A are used to determine whether the machine is currently in a suitable state for adjustment, and the target opening Lt is used for subsequent adjustment;)

[0123] Step S4: Determine whether TP < a, T2 < b, and A < c are true (herein, the threshold a is selected from a range of 90°C to 100°C, preferably 100°C. The threshold b is selected from a range of 52°C to 58°C, preferably 54°C. The threshold c is selected from a range of 10A (amperes) to 12A (amperes), preferably 11A (amperes). If the above conditions are true, proceed to step 6. At this time, the air conditioner is in normal operation. If the above conditions are not true, proceed to step 5. At this time, the air conditioner is not in normal operation.

[0124] By determining whether the exhaust TP, evaporator coil temperature T2, and current A here meet the design requirements, the air conditioner is always in the optimal design state, preparing for the next step of adjusting the electric valve.

[0125] Step S5: Increase the opening Lt by ΔL1 (the threshold ΔL1 is preferably 10 to 30 steps, and here 20 steps are selected for each adjustment), and then return to step S4.

[0126] Here, the opening is adjusted so that the parameters in step S4 meet the design requirements. At this time, the electric valve should react quickly and increase the opening quickly to quickly restore the air conditioning and refrigeration system to the optimal state.

[0127] Step S6: Determine whether d<TP<e and f<S<g are established (the values ​​here are determined according to actual experiments, the threshold value d is selected in the range of 70℃~80℃, preferably 80℃ here. The threshold value e is selected in the range of 90℃~100℃, preferably 90℃ here. The threshold value f is selected in the range of 35min~70min, preferably 38min here. The threshold value g is selected in the range of 40min~150min, preferably 40min here). If the above conditions are established, the process proceeds to step S8, at which point the flow rate of the electronic expansion valve is normal. If not, the process proceeds to step S7, at which point the flow rate of the electronic expansion valve is abnormal.

[0128] Here, the exhaust temperature TP or defrost cycle S is compared with the preset threshold value to determine whether a difference in the electric valve flow occurs. When this requirement is not met, it is determined that the electric valve flow is abnormal. Each preset threshold value is set according to the corresponding experiment, and different models have different values ​​under different working conditions.

[0129] Step S7: Correct the current target electric valve opening as follows:

[0130] When -4≤T4<5, increase or decrease the opening Lt by △L2

[0131] When -13≤T4<4, increase or decrease the opening Lt by △L3

[0132] When T4<-13, increase or decrease the opening Lt by △L4

[0133] After correction, return to step 6.

[0134] (Here, △L2, △L3, and △L4 are preset through experimental tests. Different models have different values. The preferred range is 5 steps per minute to 50 steps per minute. Here, 10 steps per minute, 8 steps per minute, and 5 steps per minute are preferred respectively).

[0135] Here, the electric valve change rate △L2>△L3>△L4 forms a piecewise function relationship. When TP≤d or S≥g, the opening Lt is reduced. When TP≥e or S≤f, the opening Lt is increased.

[0136] Step S8: After adjusting the opening, maintain the target opening Lt.

[0137] Among them, T1 is the inner ambient temperature, T2 is the inner coil temperature, T4 is the outer ambient temperature, TP is the exhaust temperature, A is the current, S is the defrost cycle duration, a, b, c, d, e, f, g are preset thresholds, Lt is the target opening of the electronic expansion valve, and △L1~△L4 are the preset thresholds for the opening change rate of the electronic expansion valve.

[0138] In this example, since the conventional low-temperature heating outdoor unit electronic expansion valve operates at a fixed opening throughout the entire process, there are certain errors in the manufacturing process or production assembly of the electric valve, causing the refrigerant flow corresponding to the existing opening to change, causing the air conditioner's output capacity to deviate from the design, and even causing exhaust, high current, compressor frequency limiting, etc., thereby affecting the air conditioner's output capacity, reducing energy efficiency, and slowing down the rise in the user's home room temperature, affecting the user experience. Therefore, this example proposes a new electric valve correction control method. Through appropriate correction, the refrigerant flow is made to meet the design requirements, the air conditioner output capacity is improved, the room temperature rises faster, and the user experience is improved.

[0139] In addition, an embodiment of the present invention also proposes an air conditioner, which includes: a memory, a processor, and an air conditioner control program stored on the memory and runnable on the processor. When the air conditioner control program is executed by the processor, the steps of the air conditioner control method described in the above embodiments are implemented.

[0140] In addition, an embodiment of the present invention further provides a computer storage medium on which a control program for an air conditioner is stored. When the control program for the air conditioner is executed by a processor, the steps of the air conditioner control method described in the above embodiments are implemented.

[0141] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0142] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0143] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0144] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The control method of the air conditioner comprises the following steps: After the defrost cycle of the air conditioner ends, obtaining defrost parameters of the air conditioner in the defrost cycle, wherein the defrost cycle includes a heating stage and a defrost stage, and the defrost parameters include heating parameters of the heating stage and defrost parameters of the defrost stage; adjusting the opening of the electronic expansion valve of the outdoor unit of the air conditioner according to the defrost parameter; The step of adjusting the opening of the electronic expansion valve of the outdoor unit of the air conditioner according to the defrost parameter comprises: determining whether the flow of the electronic expansion valve is abnormal according to the defrost parameter; When it is determined that the flow rate of the electronic expansion valve is abnormal, obtaining the outdoor ambient temperature; adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature; Wherein, the step of judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter includes: Determine whether the defrost parameter is within a preset parameter range, wherein: When the defrost parameter is not within the preset parameter range, determining that the flow rate of the electronic expansion valve is abnormal; When the defrost parameter is within the preset parameter range, determining that the flow rate of the electronic expansion valve is normal; The defrost parameter includes the maximum exhaust temperature of the air conditioner during the defrost cycle, and the step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes: When the maximum exhaust temperature is greater than the maximum value of the preset parameter range, increasing the opening of the electronic expansion valve according to the outdoor ambient temperature; When the maximum exhaust temperature is less than a minimum value of the preset parameter range, the opening of the electronic expansion valve is reduced according to the outdoor ambient temperature.

2. The air conditioner control method according to claim 1, wherein: The step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes: Determine the preset temperature range in which the outdoor ambient temperature falls; Obtaining an opening adjustment value corresponding to the preset temperature range, wherein the opening adjustment value is positively correlated with the outdoor ambient temperature; The opening of the electronic expansion valve is adjusted according to the opening adjustment value.

3. The air conditioner control method according to claim 1, wherein: The defrost parameter includes the duration of the defrost cycle, and the step of adjusting the opening of the electronic expansion valve according to the outdoor ambient temperature includes: When the duration is longer than the maximum value of the preset parameter interval, reducing the opening of the electronic expansion valve according to the outdoor ambient temperature; When the duration is less than a minimum value of the preset parameter interval, the opening of the electronic expansion valve is increased according to the outdoor ambient temperature.

4. The air conditioner control method according to claim 1, wherein: After the step of obtaining the defrost parameters of the air conditioner during the defrost cycle after the defrost cycle of the air conditioner ends, the control method of the air conditioner further includes: determining whether the air conditioner is in a normal operating state according to the defrost parameters; When the air conditioner is in a normal operating state, the step of judging whether the flow of the electronic expansion valve is abnormal according to the defrost parameter is performed.

5. The air conditioner control method according to claim 4, wherein: After the step of judging whether the air conditioner is in a normal operating state according to the defrost parameters, the method further includes: When the air conditioner is not in a normal operating state, increasing the opening of the electronic expansion valve; Return to the step of obtaining the defrost parameters of the air conditioner during the defrost cycle after the defrost cycle of the air conditioner ends.

6. The air conditioner control method according to claim 4, wherein: The defrost parameters include the maximum exhaust temperature of the air conditioner during the defrost cycle, the maximum indoor coil temperature of the air conditioner during the defrost cycle, and the maximum operating current of the outdoor unit of the air conditioner during the defrost cycle. The step of judging whether the air conditioner is in a normal operating state according to the defrost parameters includes: Determining whether the maximum exhaust temperature is less than an exhaust temperature threshold, determining whether the maximum indoor coil temperature is less than a coil temperature threshold, and determining whether the maximum operating current is less than an operating current threshold, wherein: When the maximum exhaust temperature is less than an exhaust temperature threshold, the maximum indoor coil temperature is less than a coil temperature threshold, and the maximum operating current is less than an operating current threshold, determining that the air conditioner is in a normal operating state; When the maximum exhaust temperature is greater than or equal to the exhaust temperature threshold, or the maximum indoor coil temperature is greater than or equal to the coil temperature threshold, or the maximum operating current is greater than or equal to the operating current threshold, it is determined that the air conditioner is not in normal operating state.

7. An air conditioner, characterized in that: The air conditioner includes: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor. When the air conditioner control program is executed by the processor, the steps of the air conditioner control method according to any one of claims 1 to 6 are implemented.

8. A computer storage medium, characterized in that The computer storage medium stores a control program for the air conditioner, and when the control program for the air conditioner is executed by the processor, the steps of the control method for the air conditioner according to any one of claims 1 to 6 are implemented.

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