Control method of air conditioner, air conditioner, and storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a storage medium. The method comprises the following steps: controlling the air conditioner to run a defrosting mode to defrost a target heat exchanger, and acquiring at least two temperature characteristic parameters of the target heat exchanger, wherein the different temperature characteristic parameters represent temperature states of different positions on the target heat exchanger; when the at least two temperature characteristic parameters reach a preset condition, controlling a fan corresponding to the target heat exchanger to start; wherein the running pressure of the air conditioner corresponding to the preset condition is greater than a preset pressure value. The application aims to maintain the running pressure of the air conditioner defrosting process in a normal range, improve the stability of the air conditioner defrosting process, and improve the defrosting effect of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a storage medium. Background Technology

[0002] When an air conditioner operates in extreme environments, the evaporator is prone to frost formation. The air conditioner needs to defrost, which involves switching the evaporator to condensation mode and using the heat released by the refrigerant condensation to melt the frost on its surface.

[0003] Currently, during the defrosting process of air conditioners, the fan corresponding to the heat exchanger where frost has formed is generally kept off. This can easily lead to excessively high pressure in the refrigerant system during the defrosting process, which can trigger high-pressure protection and cause the system to shut down abnormally, thus affecting the defrosting effect of the air conditioner. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to maintain the operating pressure of the air conditioner during the defrosting process within the normal range, improve the stability of the air conditioner defrosting process, and thus improve the defrosting effect of the air conditioner.

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

[0006] The air conditioner is controlled to operate in defrost mode to defrost the target heat exchanger, and at least two temperature characteristic parameters of the target heat exchanger are obtained, wherein different temperature characteristic parameters characterize the temperature state at different locations on the target heat exchanger.

[0007] When at least two temperature characteristic parameters reach preset conditions, the fan corresponding to the target heat exchanger is controlled to start; wherein, the operating pressure of the air conditioner corresponding to the preset conditions is greater than a preset pressure value.

[0008] Optionally, the step of obtaining at least two temperature characteristic parameters of the target heat exchanger includes:

[0009] Obtain a first temperature characteristic parameter at the outlet of the target heat exchanger, and obtain a second temperature characteristic parameter at the middle part of the target heat exchanger. The at least two temperature characteristic parameters include the first temperature characteristic parameter and the second temperature characteristic parameter.

[0010] Optionally, the first temperature feature parameter includes a temperature change value, the second temperature feature parameter includes a first temperature value, and the preset condition includes: the temperature change value is less than a preset change value, and the first temperature value is greater than or equal to a preset temperature threshold.

[0011] The preset change value is the minimum allowable temperature change at the outlet when there is no refrigerant deposition in the target heat exchanger.

[0012] Optionally, after the steps of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle part of the target heat exchanger, the method further includes:

[0013] When the temperature change value is greater than or equal to the preset change value, or when the temperature change value is less than the preset change value and the first temperature value is less than the preset temperature threshold, the fan is controlled to shut down.

[0014] Optionally, the first characteristic parameter further includes a second temperature value, and the preset condition further includes: the second temperature value is less than a preset temperature, wherein the preset temperature is the minimum temperature that the outlet needs to reach when the air conditioner ends the defrosting mode.

[0015] Optionally, after the steps of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle part of the target heat exchanger, the method further includes:

[0016] When the second temperature value is greater than or equal to the preset temperature, the air conditioner is controlled to exit the defrosting mode.

[0017] Optionally, the step of controlling the fan corresponding to the target heat exchanger to start includes:

[0018] The discharge pressure of the air conditioner's compressor, the ambient temperature of the environment where the target heat exchanger is located, and the temperature of the air conditioner's heat exchanger are obtained.

[0019] The target speed of the fan is determined based on the exhaust pressure, the ambient temperature, and the heat exchanger temperature.

[0020] Control the fan to operate at the target speed.

[0021] Optionally, the step of determining the target speed of the fan based on the exhaust pressure, the ambient temperature, and the heat exchanger temperature includes:

[0022] The pressure threshold is determined based on the ambient temperature and the heat exchanger temperature.

[0023] Determine the difference between the exhaust pressure and the pressure threshold;

[0024] The target rotational speed is determined based on the difference.

[0025] In addition, to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein when the air conditioner control program is executed by the processor, it implements the steps of the air conditioner control method as described in any of the preceding claims.

[0026] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0027] This invention proposes a control method for an air conditioner. During the defrosting process of the air conditioner to defrost a target heat exchanger, the method acquires temperature characteristic parameters at at least two different locations on the target heat exchanger. When at least two temperature characteristic parameters reach a preset condition, it indicates that the operating pressure of the air conditioner is greater than a preset pressure value. At this time, the fan is turned on. During the defrosting process, the fan is no longer kept off. Turning on the fan reduces the operating pressure of the air conditioner system, effectively preventing excessively high operating pressure and ensuring that the operating pressure during the defrosting process remains within the normal range. This reduces air conditioner shutdowns, improves the stability of the defrosting process, and enhances the defrosting effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0029] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0030] Figure 3 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0031] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0032] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0033] 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

[0034] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] The main solution of this invention is: controlling the air conditioner to operate in defrost mode to defrost the target heat exchanger, and obtaining at least two temperature characteristic parameters of the target heat exchanger, wherein different temperature characteristic parameters characterize the temperature state at different locations on the target heat exchanger; when the at least two temperature characteristic parameters reach a preset condition, controlling the fan corresponding to the target heat exchanger to start; wherein the operating pressure of the air conditioner corresponding to the preset condition is greater than a preset pressure value.

[0036] In existing technology, during the defrosting process of an air conditioner, the fan corresponding to the heat exchanger where frost forms usually stops. This can easily lead to excessively high pressure in the refrigerant system during the defrosting process, which can trigger high-pressure protection and cause the system to shut down abnormally, thus affecting the defrosting effect of the air conditioner.

[0037] The present invention provides the above-mentioned solution, which aims to improve the stability of the air conditioner defrosting process and thus improve the defrosting effect.

[0038] This invention provides an air conditioner. The air conditioner can be any type of air conditioner, such as a split-type air conditioner, an integrated air conditioner, a multi-split air conditioner, or a portable air conditioner.

[0039] In this embodiment, refer to Figure 1 The air conditioner includes a refrigerant circulation system and a control device 100. The refrigerant circulation system includes a compressor 1, a first heat exchanger, a throttling device 2, and a second heat exchanger. A first fan 3 is correspondingly provided for the first heat exchanger, and the first fan 3 can be used to drive air to exchange heat with the first heat exchanger. A second fan 4 is correspondingly provided for the second heat exchanger, and the second fan 4 can be used to drive air to exchange heat with the second heat exchanger.

[0040] In this embodiment, the first heat exchanger is an outdoor heat exchanger, and the second heat exchanger is an indoor heat exchanger. In other embodiments, both the first and second heat exchangers can be located indoors.

[0041] When the air conditioner is in cooling mode, the refrigerant discharged from compressor 1 flows sequentially through the first heat exchanger, the throttling device 2, and the second heat exchanger before returning to compressor 1. The first heat exchanger is in a condensing state, and the second heat exchanger is in an evaporating state. When the air conditioner is in heating mode, the refrigerant discharged from compressor 1 flows sequentially through the second heat exchanger, the throttling device 2, and the second heat exchanger before returning to compressor 1. The first heat exchanger is in an evaporating state, and the second heat exchanger is in a condensing state. During defrosting operation, the air conditioner can operate in either heating or cooling mode. When the first heat exchanger is frosted, the air conditioner can operate in heating mode to defrost it; when the second heat exchanger is frosted, the air conditioner can operate in cooling mode to defrost it.

[0042] Furthermore, refer to Figure 1The air conditioner may also include a temperature detection module 5 connected to the control device 100, which can acquire data detected by the temperature detection module 5. The temperature detection module 5 is located on the first heat exchanger and / or the second heat exchanger described above. The temperature detection module 5 includes at least two temperature sensors. The heat exchanger corresponding to the temperature detection module 5 is defined as the target heat exchanger, and different temperature sensors are located at different positions on the target heat exchanger. In this embodiment, one of the at least two temperature sensors is located at the refrigerant outlet of the target heat exchanger, and the other of the at least two temperature sensors is located in the middle of the coil of the target heat exchanger. The number of at least two temperature sensors can be two, three, four, or more. Besides the middle of the coil and the refrigerant outlet of the target heat exchanger, the at least two temperature sensors can also be located at other positions, such as the refrigerant inlet of the target heat exchanger.

[0043] In this embodiment of the invention, reference is made to Figure 1 The control device 100 of the air conditioner includes a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. The components in the control device 100 are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0044] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0045] like Figure 1 As shown, the memory 1002, which serves as a storage medium, may include a control program for an air conditioner. Figure 1 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0046] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0047] Reference Figure 2 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes:

[0048] Step S10: Control the air conditioner to run the defrost mode to defrost the target heat exchanger, and obtain at least two temperature characteristic parameters of the target heat exchanger. Different temperature characteristic parameters characterize the temperature state at different locations on the target heat exchanger.

[0049] The target heat exchanger is the frosted heat exchanger in the air conditioner. When the air conditioner operates in defrost mode, its goal is to melt the frost on the target heat exchanger. The air conditioner can operate in either cooling or heating mode during defrost mode, as long as the temperature of the target heat exchanger can be raised. In this embodiment, the target heat exchanger is in a condensed state when the air conditioner operates in defrost mode.

[0050] Temperature characteristic parameters may include the real-time temperature value at the corresponding location, the temperature change value at the corresponding location within the target time period, or more than one temperature value collected at the corresponding location at more than one time.

[0051] During the defrosting mode of the air conditioner, at least two temperature characteristic parameters can be acquired in real time or at preset intervals.

[0052] At least two temperature characteristic parameters characterize the temperature state at at least two temperatures on the target heat exchanger. The at least two locations include at least two of the following: the middle of the coil, the outlet, and the inlet of the target heat exchanger. For example, the at least two temperature characteristic parameters include the temperature characteristic parameters corresponding to the middle of the coil and the inlet of the target heat exchanger, the temperature characteristic parameters corresponding to the outlet and the inlet of the target heat exchanger, and the temperature characteristic parameters corresponding to the outlet and the middle of the coil of the target heat exchanger.

[0053] Step S20: When the at least two temperature characteristic parameters reach the preset conditions, control the fan corresponding to the target heat exchanger to start; wherein, the operating pressure of the air conditioner corresponding to the preset conditions is greater than the preset pressure value.

[0054] The preset conditions are specifically the conditions that at least two temperature characteristic parameters need to meet when the operating pressure of the air conditioner is greater than a preset pressure value. The preset conditions may specifically include the target quantitative relationship that needs to be achieved between at least two temperature characteristic parameters, or the target magnitude relationship that needs to be achieved between each of the at least two temperature characteristic parameters and the corresponding target parameter, or the target magnitude relationship or target quantitative relationship that needs to be achieved between the temperature characterization value calculated from at least two temperature characteristic parameters and the target value, etc.

[0055] The preset pressure value is a critical pressure threshold used to distinguish whether the air conditioner needs to be shut down for protection. If the operating pressure is greater than the preset pressure value, it indicates that the air conditioner is operating under excessive pressure and needs to be shut down to avoid system damage; if the operating pressure is less than or equal to the preset pressure value, it indicates that the air conditioner is operating under normal pressure and does not need to be shut down for protection.

[0056] When the fan is turned on, it can run at a fixed speed or at a speed determined by the actual operating parameters of the air conditioner.

[0057] It should be noted that when the air conditioner's defrost mode is activated, the fan corresponding to the target heat exchanger can be shut off. While the fan is off, at least two temperature characteristic parameters are detected. If at least two temperature characteristic parameters meet preset conditions, the fan is switched from off to on. If at least two temperature characteristic parameters do not meet the preset conditions, the fan remains off. Alternatively, when the air conditioner's defrost mode is activated, at least two temperature characteristic parameters are detected. If at least two temperature characteristic parameters meet preset conditions, the fan is turned on. If at least two temperature characteristic parameters do not meet the preset conditions, the fan is turned off. If the fan is on when at least two temperature characteristic parameters meet the preset conditions, the fan can be kept on or kept on while operating at an increased speed.

[0058] This invention proposes a control method for an air conditioner. During the defrosting operation of the air conditioner to defrost the target heat exchanger, the method acquires temperature characteristic parameters at at least two different locations on the target heat exchanger. When at least two temperature characteristic parameters reach a preset condition, it indicates that the operating pressure of the air conditioner is greater than a preset pressure value. At this time, the fan is turned on. The turning on of the fan can reduce the operating pressure of the air conditioner system, thereby effectively avoiding excessively high air conditioner operating pressure, ensuring that the operating pressure during the defrosting process is maintained within the normal range, reducing air conditioner shutdowns, improving the stability of the defrosting process, and thus improving the defrosting effect.

[0059] Furthermore, when at least two temperature characteristic parameters fail to meet preset conditions, the fan corresponding to the target heat exchanger is shut down to improve the defrosting efficiency of the target heat exchanger while ensuring normal system pressure. After shutting down the fan corresponding to the target heat exchanger or after step S20 above, the process can return to step S10 to ensure the continuous and stable operation of the air conditioner's defrosting process.

[0060] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 3 The step of obtaining at least two temperature characteristic parameters of the target heat exchanger includes:

[0061] Step S11: Obtain a first temperature characteristic parameter of the outlet of the target heat exchanger and a second temperature characteristic parameter of the middle part of the target heat exchanger. The at least two temperature characteristic parameters include the first temperature characteristic parameter and the second temperature characteristic parameter.

[0062] The first temperature characteristic parameter may include the current first temperature value of the refrigerant outlet of the target heat exchanger, the temperature change value of the refrigerant outlet of the target heat exchanger within a preset time period (such as the temperature change rate or temperature change amplitude, etc.), and / or more than one temperature value detected at more than one moment of the refrigerant outlet of the target heat exchanger.

[0063] The second temperature characteristic parameter may include the current first temperature value of the coil center of the target heat exchanger, the temperature change value of the coil center of the target heat exchanger within a preset time period (such as the temperature change rate or temperature change amplitude, etc.), and / or more than one temperature value detected at more than one moment in the coil center of the target heat exchanger.

[0064] Based on this, the preset conditions may include the target quantitative relationship (such as target difference or target ratio) that needs to be achieved between the first temperature characteristic parameter and the second temperature characteristic parameter. The preset conditions may also include the target relationship (such as quantitative relationship or size relationship) between the first temperature characteristic parameter and the corresponding threshold, and the target relationship (such as quantitative relationship or size relationship) between the second temperature characteristic parameter and the corresponding threshold, and so on.

[0065] By combining the first and second temperature characteristic parameters, the impact of the defrosting state of the heat exchanger on the system pressure during the defrosting process can be accurately characterized. Based on whether the first and second temperature characteristic parameters reach the preset conditions, the system pressure can be accurately characterized. Therefore, when the first and second temperature characteristic parameters reach the preset conditions, the fan is turned on to further ensure that the system pressure can be maintained within the normal range, thus ensuring the stability of system operation and the effective improvement of defrosting effect.

[0066] Furthermore, in this embodiment, the first temperature characteristic parameter includes a temperature change value, and the second temperature characteristic parameter includes a first temperature value. Specifically, the temperature change value can be determined by acquiring the first outlet temperature detected by the temperature sensor at the refrigerant outlet of the target heat exchanger at the current moment and the second outlet temperature detected at a previous moment, and then determining the temperature change value based on the first and second outlet temperatures. In this embodiment, the temperature change value is the temperature change rate, which can be determined based on the ratio of the temperature difference between the first and second outlet temperatures to a target duration, where the target duration is the interval between the current moment and the first moment. In other embodiments, the temperature change value can also be the temperature change amplitude, where the temperature difference between the first and second outlet temperatures can be used as the temperature change value. The first temperature value is the temperature currently detected by the temperature sensor in the middle of the target heat exchanger coil.

[0067] The preset conditions include: the temperature change value is less than a preset change value, and the first temperature value is greater than or equal to a preset temperature threshold; the preset change value is the minimum allowable temperature change value at the outlet when there is no refrigerant deposition in the target heat exchanger. Based on this, refer to Figure 3 Step S20 includes:

[0068] Step S21: When the temperature change value is less than the preset change value and the first temperature value is greater than or equal to the preset temperature threshold, control the fan corresponding to the target heat exchanger to start.

[0069] When the temperature change value is less than the preset change value, it indicates that there is refrigerant deposit in the target heat exchanger, resulting in a slow rise in outlet temperature. If the temperature in the middle of the target heat exchanger is too high, it can be considered that the system pressure is too high. At this time, the outdoor fan is turned on to effectively prevent the system pressure from being too high, thereby effectively improving the stability of the defrosting operation and the defrosting effect of the air conditioner.

[0070] Furthermore, in this embodiment, referring to Figure 3 After step S11, the following may also be included:

[0071] Step S30: When the temperature change value is greater than or equal to the preset change value, or when the temperature change value is less than the preset change value and the first temperature value is less than the preset temperature threshold, control the fan to shut down.

[0072] If the temperature change value and the first temperature value do not meet the above preset conditions, the system pressure can be considered to be normal. At this time, the fan is turned off, which helps to ensure the stable operation of the system and improve the defrosting efficiency of the target heat exchanger.

[0073] The specific order in which steps S30 and S21 are executed is not limited.

[0074] After step S30, step S10 can be returned to ensure the stability of the air conditioner during the defrosting process and effectively improve the defrosting effect.

[0075] In other embodiments, when the temperature change value and the first temperature value do not meet the above-mentioned preset conditions, the fan can also be controlled to start, and the fan speed is lower than the fan speed when the temperature change value and the first temperature value meet the preset conditions.

[0076] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, the first characteristic parameter further includes a second temperature value, which is specifically obtained by acquiring the temperature currently detected by a temperature sensor located at the refrigerant outlet of the target heat exchanger. The preset condition further includes: the second temperature value is less than a preset temperature, where the preset temperature is the minimum temperature required for the outlet to reach when the air conditioner ends the defrosting mode. That is, referring to... Figure 4 Step S21 includes:

[0077] Step S211: When the second temperature value is less than the preset temperature, and when the temperature change value is less than the preset change value and the first temperature value is greater than or equal to the preset temperature threshold, control the fan corresponding to the target heat exchanger to start.

[0078] When the second temperature value is lower than the preset temperature, it indicates that the target heat exchanger still needs defrosting. Based on this, further combining the temperature change value and the first temperature value to determine whether the system pressure is too high is beneficial to improving the accuracy of the judgment result and improving the timeliness of starting the fan when the system pressure is too high.

[0079] Furthermore, in this embodiment, referring to Figure 4 After step S11, the following steps are also included:

[0080] Step S40: When the second temperature value is greater than or equal to the preset temperature, control the air conditioner to exit the defrosting mode.

[0081] The specific order in which steps S40 and S211 are executed is not limited.

[0082] When the outlet temperature of the target heat exchanger is greater than or equal to the preset temperature, it can be assumed that the target heat exchanger does not require defrosting. At this time, the air conditioner is controlled to exit the defrosting mode, and defrosting is stopped to avoid the system pressure being too high due to defrosting without frost, thus protecting the air conditioning system while ensuring the defrosting effect.

[0083] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 5 The step of controlling the start of the fan corresponding to the target heat exchanger includes:

[0084] Step S201: Obtain the discharge pressure of the air conditioner's compressor, the ambient temperature of the environment where the target heat exchanger is located, and the temperature of the air conditioner's heat exchanger.

[0085] When the target heat exchanger is located outdoors, the ambient temperature is the outdoor ambient temperature. When the target heat exchanger is located indoors, the ambient temperature is the indoor ambient temperature.

[0086] The heat exchanger temperature specifically includes the temperature of all heat exchangers in the air conditioner (including the target heat exchanger and other heat exchangers besides the target heat exchanger), such as the first heat exchanger temperature and the second heat exchanger temperature of the first heat exchanger mentioned above.

[0087] The exhaust pressure is specifically detected by a pressure sensor at the compressor's exhaust port.

[0088] Step S202: Determine the target speed of the fan based on the exhaust pressure, the ambient temperature, and the heat exchanger temperature;

[0089] The correspondence between exhaust pressure, ambient temperature, heat exchanger temperature and target speed can be established in advance. This correspondence can be in the form of mapping relationship, calculation relationship, etc. Based on this correspondence, the speed corresponding to the current exhaust pressure, ambient temperature and heat exchanger temperature can be determined as the target speed.

[0090] In this embodiment, a pressure threshold is determined based on the ambient temperature and the heat exchanger temperature; the difference between the exhaust pressure and the pressure threshold is determined; and the target rotational speed is determined based on the difference. Specifically, different ambient temperatures and different heat exchanger temperatures correspond to different pressure thresholds, and the pressure threshold can be the maximum allowable exhaust pressure. The pressure threshold can be calculated or obtained by querying a mapping table using the ambient temperature and heat exchanger temperature. The pressure threshold characterizes the pressure requirement of the air conditioning system during stable defrosting operation under current conditions. The difference can be the calculated result of subtracting the pressure threshold from the exhaust pressure. The target rotational speed can be positively correlated with the difference. Specifically, when the difference is less than a preset threshold, the preset rotational speed can be used as the target rotational speed; when the difference is greater than the preset threshold, the second rotational speed corresponding to the difference can be used as the target rotational speed. Different differences correspond to different second rotational speeds, and the second rotational speed is positively correlated with the difference.

[0091] Step S203: Control the fan to run at the target speed.

[0092] In this embodiment, the target speed for the fan to start in defrosting mode is determined by combining the exhaust pressure, ambient temperature, and heat exchanger temperature. This helps to improve the defrosting effect while ensuring that the air conditioning system pressure can quickly and accurately reach the normal range when the fan is running at the target speed, thereby further improving the operational stability of the air conditioner during the defrosting process.

[0093] Furthermore, this embodiment of the invention also proposes a storage medium storing a control program for an air conditioner. When the control program for the air conditioner is executed by a processor, it implements the relevant steps of any embodiment of the control method for the air conditioner described above.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes the following steps: The air conditioner is controlled to operate in defrost mode to defrost the target heat exchanger, and at least two temperature characteristic parameters of the target heat exchanger are acquired. Different temperature characteristic parameters characterize the temperature state at different locations on the target heat exchanger. The steps for obtaining at least two temperature characteristic parameters of the target heat exchanger include: Obtain a first temperature characteristic parameter of the outlet of the target heat exchanger, and obtain a second temperature characteristic parameter of the middle part of the target heat exchanger. The at least two temperature characteristic parameters include the first temperature characteristic parameter and the second temperature characteristic parameter. The first temperature characteristic parameter includes a temperature change value, and the second temperature characteristic parameter includes a first temperature value. When at least two temperature characteristic parameters reach preset conditions, the fan corresponding to the target heat exchanger is controlled to start. The operating pressure of the air conditioner corresponding to the preset conditions is greater than a preset pressure value. The preset conditions include: the temperature change value is less than a preset change value, and the first temperature value is greater than or equal to a preset temperature threshold. The preset change value is the minimum temperature change value allowed at the outlet when there is no refrigerant deposition in the target heat exchanger. The steps for controlling the start of the fan corresponding to the target heat exchanger include: The system obtains the discharge pressure of the air conditioner's compressor, the ambient temperature of the environment where the target heat exchanger is located, and the temperature of the air conditioner's heat exchanger. Based on the discharge pressure, the ambient temperature, and the heat exchanger temperature, the system determines the target speed of the fan and controls the fan to run at the target speed. When the temperature change value is greater than or equal to the preset change value, or when the temperature change value is less than the preset change value and the first temperature value is less than the preset temperature threshold, the fan is controlled to shut down.

2. The control method for an air conditioner as described in claim 1, characterized in that, The first temperature characteristic parameter also includes a second temperature value, and the preset condition further includes: the second temperature value is less than a preset temperature, wherein the preset temperature is the minimum temperature that the outlet needs to reach when the air conditioner ends the defrosting mode.

3. The control method for an air conditioner as described in claim 2, characterized in that, After the steps of obtaining the first temperature characteristic parameter of the outlet of the target heat exchanger and obtaining the second temperature characteristic parameter of the middle part of the target heat exchanger, the method further includes: When the second temperature value is greater than or equal to the preset temperature, the air conditioner is controlled to exit the defrosting mode.

4. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the target speed of the fan based on the exhaust pressure, the ambient temperature, and the heat exchanger temperature includes: The pressure threshold is determined based on the ambient temperature and the heat exchanger temperature. Determine the difference between the exhaust pressure and the pressure threshold; The target rotational speed is determined based on the difference.

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

6. A storage medium, characterized in that, The storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 4.

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