Air conditioner control method and device and air conditioner

Abstract

The application provides an air conditioner control method, device and air conditioner. The method comprises the following steps: acquiring a pressure parameter collected by a pressure sensor arranged in an air duct of an outdoor heat exchanger when the air conditioner is in a heating working mode; and controlling the air conditioner to perform a defrosting operation on the outdoor heat exchanger when the pressure parameter indicates that a pressure change in the air duct meets a preset condition. The air conditioner control method, device and air conditioner provided by the application are used for accurately judging whether the air conditioner reaches a necessary condition for defrosting, so as to reduce the influence of frequent defrosting operations on users.

Description

Technical Field

[0001] This application relates to the field of air conditioner control, and more particularly to an air conditioner control method, device and air conditioner. Background Technology

[0002] In winter, when outdoor temperatures are very low, the outdoor unit of an air conditioner is prone to frost buildup when it is in heating mode. This is especially true in areas with high humidity during winter, where ice is more likely to form on the bottom of the outdoor unit, thus affecting the air conditioner's heating performance.

[0003] In related technologies, air conditioners defrost the outdoor heat exchanger in heating mode, mainly by installing a temperature sensor on the condenser to detect the outdoor coil temperature for defrosting control. When the detected temperature meets the defrosting conditions, the air conditioner is controlled to perform the defrosting operation.

[0004] However, the above method has significant limitations. The temperature sensor can only detect the temperature of a local area of ​​the outdoor heat exchanger. Other parts of the outdoor heat exchanger may not have frost. In such cases, directly performing the defrosting operation will not only affect the heating effect but also the user experience. Summary of the Invention

[0005] The purpose of this application is to provide an air conditioner control method, device, and air conditioner for accurately determining whether the air conditioner has met the necessary conditions for defrosting, so as to reduce the impact of frequent defrosting operations on users.

[0006] This application provides an air conditioner control method, including:

[0007] When the air conditioner is in heating mode, the pressure parameters collected by the pressure sensor installed in the air duct of the outdoor heat exchanger are obtained; when the pressure parameters indicate that the pressure change in the air duct meets the preset conditions, the air conditioner is controlled to perform a defrosting operation on the outdoor heat exchanger.

[0008] Optionally, when the air conditioner is in heating mode, acquiring the pressure parameters collected by the pressure sensor installed in the air duct of the outdoor heat exchanger includes: controlling the air conditioner to run in heating mode for a first preset time and determining the pressure parameters collected by the pressure sensor as the first pressure parameter; and determining the pressure parameters collected by the pressure sensor in real time after the air conditioner has run in heating mode for the first preset time as the second pressure parameter.

[0009] Optionally, the step of controlling the air conditioner to perform a defrost operation on the outdoor heat exchanger when the pressure parameter indicates that the pressure change in the air duct meets a preset condition includes: obtaining a target pressure difference; the target pressure difference is the absolute value of the pressure difference between the second pressure parameter and the first pressure parameter; controlling the air conditioner to perform a target operation when the target pressure difference meets a target preset condition; and controlling the air conditioner to perform a defrost operation on the outdoor heat exchanger after the air conditioner performs the target operation if the target pressure difference meets the target preset condition; wherein the target preset condition is that the target pressure difference is greater than a preset pressure difference threshold; the target operation includes at least one of the following: increasing the speed of the fan in the outdoor unit, reducing the operating frequency of the compressor, and increasing the flow rate of refrigerant in the outdoor unit.

[0010] Optionally, controlling the air conditioner to perform the target operation when the target pressure difference meets the target preset condition includes: controlling the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for a second preset time when the target pressure difference meets the target preset condition.

[0011] Optionally, after controlling the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for a second preset time, the method further includes: determining whether the target pressure difference meets the target preset condition; and reducing the operating frequency of the compressor when the target pressure difference meets the target preset condition and the target temperature difference is less than or equal to a preset temperature difference threshold; wherein the target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature.

[0012] Optionally, before reducing the operating frequency of the compressor, the method further includes: when the target pressure difference meets the target preset condition and the target temperature difference is greater than the preset temperature difference threshold, increasing the flow rate of refrigerant in the outdoor unit to reduce the value corresponding to the target temperature difference.

[0013] Optionally, after controlling the air conditioner to perform the target operation, the method further includes: determining whether the target pressure difference meets the target preset condition; if the target pressure difference does not meet the target preset condition, controlling the air conditioner to restore the operating parameters of the air conditioner to the state before performing the target operation.

[0014] Optionally, after controlling the air conditioner to perform a defrosting operation on the outdoor heat exchanger, the method further includes: determining whether the target pressure difference meets the target preset condition; and controlling the air conditioner to stop the defrosting operation if the target pressure difference does not meet the target preset condition.

[0015] This application also provides an air conditioner control device, including:

[0016] The acquisition module is used to acquire pressure parameters collected by a pressure sensor installed in the air duct of the outdoor heat exchanger when the air conditioner is in heating mode; the control module is used to control the air conditioner to perform a defrosting operation on the outdoor heat exchanger when the pressure parameters indicate that the pressure change in the air duct meets preset conditions.

[0017] Optionally, the device further includes: a determining module; the control module is further configured to control the air conditioner to operate in heating mode for a first preset duration; the determining module is configured to determine the pressure parameter collected by the pressure sensor as a first pressure parameter; the determining module is further configured to determine the pressure parameter collected by the pressure sensor in real time after the air conditioner operates in heating mode for the first preset duration as a second pressure parameter.

[0018] Optionally, the acquisition module is further configured to acquire a target pressure difference; the target pressure difference is the absolute value of the pressure difference between the second pressure parameter and the first pressure parameter; the control module is specifically configured to control the air conditioner to perform a target operation when the target pressure difference meets a target preset condition; the control module is further configured to control the air conditioner to perform a defrost operation on the outdoor heat exchanger after the air conditioner performs the target operation, if the target pressure difference meets the target preset condition; wherein, the target preset condition is that the target pressure difference is greater than a preset pressure difference threshold; the target operation includes at least one of the following: increasing the speed of the fan in the outdoor unit, reducing the operating frequency of the compressor, and increasing the flow rate of refrigerant in the outdoor unit.

[0019] Optionally, the control module is specifically used to control the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for a second preset duration when the target pressure difference meets the target preset condition.

[0020] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module is specifically configured to reduce the operating frequency of the compressor when the target pressure difference meets the target preset condition and the target temperature difference is less than or equal to a preset temperature difference threshold; wherein, the target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature.

[0021] Optionally, the control module is further configured to increase the flow rate of refrigerant in the outdoor unit to reduce the value corresponding to the target temperature difference when the target pressure difference meets the target preset condition and the target temperature difference is greater than the preset temperature difference threshold.

[0022] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module is specifically configured to control the air conditioner to restore the operating parameters of the air conditioner to the state before the target operation was performed if the target pressure difference does not meet the target preset condition.

[0023] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module is further configured to control the air conditioner to stop the defrosting operation if the target pressure difference does not meet the target preset condition.

[0024] This application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of any of the above-described air conditioner control methods.

[0025] This application also provides an air conditioner, including an indoor unit and an outdoor unit, as well as a pressure sensor, a memory, a processor, and a computer program stored in the memory and executable on the processor. The pressure sensor is disposed in the air duct of the outdoor unit, and the processor executes the program to implement the steps of any of the above-described air conditioner control methods.

[0026] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the above-described air conditioner control methods.

[0027] The air conditioner control method, device, and air conditioner provided in this application acquire pressure parameters collected by a pressure sensor installed inside the air duct of the outdoor heat exchanger when the air conditioner is in heating mode. When the pressure parameters indicate that the pressure change inside the air duct meets preset conditions, the air conditioner is controlled to perform a defrosting operation on the outdoor heat exchanger. Thus, by monitoring the pressure changes inside the air duct, it is possible to accurately determine whether the frost condensed on the outdoor heat exchanger has reached a level that requires removal, and to perform a defrosting operation when the necessary removal conditions are met, thereby avoiding the inconvenience caused to users by frequent defrosting. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the operating principle of the air conditioner provided in this application;

[0030] Figure 2 This is one of the flowcharts illustrating the air conditioner control method provided in this application;

[0031] Figure 3 This is the second flowchart of the air conditioner control method provided in this application;

[0032] Figure 4 This is the third flowchart of the air conditioner control method provided in this application;

[0033] Figure 5 This is a schematic diagram of the structure of the air conditioner control device provided in this application;

[0034] Figure 6 This is a schematic diagram of the structure of the electronic device provided in this application. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] To better understand the principles behind each step in the embodiments of this application, the operating principle of the air conditioner involved in the embodiments of this application is described in detail below:

[0038] like Figure 1As shown, the compressor compresses the refrigerant and delivers it through pipes to the condenser. The high-temperature, high-pressure gaseous refrigerant releases heat in the condenser, transforming into a medium-temperature, high-pressure liquid refrigerant. Then, the medium-temperature, high-pressure liquid refrigerant is depressurized through a capillary tube (throttling unit) to become a low-temperature, low-pressure liquid refrigerant. This low-temperature, low-pressure liquid refrigerant is then delivered to the evaporator, where it evaporates into a gas, absorbing a large amount of heat during the evaporation process. Finally, the low-temperature, low-pressure gaseous refrigerant in the evaporator is delivered back to the compressor to participate in the next cycle.

[0039] When an air conditioner is cooling, the outdoor unit's heat exchanger is the condenser, and the indoor unit's heat exchanger is the evaporator; conversely, when an air conditioner is heating, the outdoor unit's heat exchanger is the evaporator, and the indoor unit's heat exchanger is the condenser.

[0040] When an air conditioner is in heating mode, a large amount of water vapor will condense on the surface of the outdoor heat exchanger (which is used as an evaporator at this time), and this condensation will form frost at low temperatures. The frost condensing on the surface of the outdoor heat exchanger will greatly affect the heating performance of the air conditioner. Therefore, when using an air conditioner for heating in cold weather, it is necessary to defrost the outdoor unit.

[0041] To address the technical problem of inaccurate judgment conditions for defrosting in related technologies, this application provides an air conditioner control method that can accurately determine whether the air conditioner must perform a defrosting operation, and control the air conditioner to perform the defrosting operation when the defrosting conditions are met.

[0042] The air conditioner control method provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0043] like Figure 2 As shown in the embodiment of this application, an air conditioner control method is provided, which may include the following steps 201 and 202:

[0044] Step 201: When the air conditioner is in heating mode, obtain the pressure parameters collected by the pressure sensor installed in the air duct of the outdoor heat exchanger.

[0045] For example, in this embodiment of the application, a pressure sensor needs to be installed in the air duct of the outdoor heat exchanger, and the pressure parameters in the air duct need to be obtained in real time through the pressure sensor.

[0046] It should be noted that when frost forms on the surface of the outdoor heat exchanger, the condensed frost will inevitably compress the space in the air duct, leading to an increase in the gas pressure inside the air duct. Therefore, the need to perform defrosting operation on the outdoor heat exchanger can be determined by observing the changes in the pressure inside the air duct.

[0047] Step 202: When the pressure parameter indicates that the pressure change in the air duct meets the preset conditions, control the air conditioner to perform a defrosting operation on the outdoor heat exchanger.

[0048] For example, when the pressure change in the air duct meets the preset conditions, it is determined that the outdoor unit of the air conditioner needs to be defrosted. At this time, the air conditioner can be controlled to perform the defrosting operation.

[0049] For example, the above defrosting operation may involve controlling the air conditioner to operate in cooling mode, using the heat of the refrigerant to raise the temperature of the outdoor heat exchanger, thereby melting the frost condensed on the surface of the outdoor heat exchanger.

[0050] It should be noted that, in this application embodiment, in addition to defrosting through the cooling mode, other defrosting methods can also be used, and the specific defrosting method depends on the settings of the air conditioner. This application embodiment mainly focuses on introducing the triggering conditions for the air conditioner to perform the defrosting operation, and describes the air conditioner control method provided in this application embodiment.

[0051] Optionally, in this embodiment of the application, since the surface of the outdoor heat exchanger may only frost up after the air conditioner has been running in heating mode for a period of time, and the pressure values ​​of the air duct of the air conditioner are different in different modes, it is necessary to first determine the reference pressure value, and then determine whether the pressure in the air duct meets the defrosting conditions based on the reference pressure value.

[0052] For example, step 201 above may include steps 201a1 and 201a2:

[0053] Step 201a1: Control the air conditioner to run in heating mode for a first preset time, and determine the pressure parameter collected by the pressure sensor as the first pressure parameter.

[0054] Step 201a2: Determine the pressure parameter collected in real time by the pressure sensor after the air conditioner has been running in heating mode for the first preset time as the second pressure parameter.

[0055] For example, such as Figure 3 As shown, the air conditioner is controlled to turn on the heating mode, and after running in the heating mode for t1 time (for example, 5 minutes), the current pressure parameter P1 of the pressure sensor (i.e. the first pressure parameter mentioned above) is collected, and P1 is used as the reference pressure value.

[0056] Specifically, after obtaining the first pressure parameter and the second pressure parameter, step 202 may include the following steps: 202a, 202b, and 202c.

[0057] Step 202a: Obtain the target pressure difference.

[0058] Wherein, the target pressure difference is the absolute value of the pressure difference between the second pressure parameter and the first pressure parameter.

[0059] Step 202b: When the target pressure difference meets the target preset conditions, control the air conditioner to perform the target operation.

[0060] The target preset condition is that the target pressure difference is greater than a preset pressure difference threshold; the target operation includes at least one of the following: increasing the fan speed in the outdoor unit, reducing the operating frequency of the compressor, and increasing the refrigerant flow rate in the outdoor unit.

[0061] Step 202c: After the air conditioner performs the target operation, if the target pressure difference meets the target preset condition, then control the air conditioner to perform a defrosting operation on the outdoor heat exchanger.

[0062] For example, such as Figure 3 As shown, after determining the reference pressure value, the difference between the real-time pressure parameter P2 and the reference pressure value, ΔP = P2 - P1 (as described above), can be calculated by real-time acquisition of the pressure parameter P2 from the pressure sensor (i.e., the second pressure parameter mentioned above). Then, this ΔP can be used to determine whether defrosting is required.

[0063] Optionally, in this embodiment of the application, it is not possible to directly determine whether the frost condensed on the surface of the outdoor heat exchanger has reached the point where it must be removed simply by using the target pressure difference mentioned above. Therefore, a series of operations can be performed by controlling the air conditioner to make a further judgment.

[0064] Specifically, step 202b above may include the following step 202b1:

[0065] Step 202b1: When the target pressure difference meets the target preset condition, control the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for a second preset time.

[0066] For example, such as Figure 4 As shown, when ΔP > P0 (i.e. the preset differential pressure threshold mentioned above), in order to determine whether defrosting is required, the speed of the outdoor unit fan can be increased and it can be run continuously for 10 minutes (min) to increase the air volume in the air duct and improve the heat exchange efficiency.

[0067] For example, if the target pressure difference is less than or equal to a preset pressure difference threshold after increasing the fan speed, it indicates that the frost condensed on the surface of the outdoor heat exchanger has not reached a level requiring treatment. In this case, the system can continue to operate with the parameters before adjusting the fan speed.

[0068] For example, after making the first judgment by increasing the outdoor unit fan speed, a second judgment can be made to determine whether the air conditioner needs defrosting.

[0069] Specifically, after step 202b1, step 202b may further include the following steps 202b2 and 202b3:

[0070] Step 202b2: Determine whether the target pressure difference meets the target preset condition.

[0071] Step 202b3: When the target pressure difference meets the target preset condition and the target temperature difference is less than or equal to the preset temperature difference threshold, reduce the operating frequency of the compressor.

[0072] The target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature.

[0073] For example, if the target pressure difference still meets the target preset conditions when the outdoor unit fan speed is increased, it can be determined whether defrosting is required by the difference between the indoor ambient temperature and the set temperature.

[0074] For example, such as Figure 4 As shown, if increasing the outdoor unit fan speed still satisfies ΔP > P0, the compressor's operating frequency can be reduced and it can be run continuously for 10 minutes to reduce the heating capacity requirement of the heating mode. If reducing the compressor's operating frequency still satisfies ΔP > P0, it can be determined that the frost on the outdoor unit surface is quite severe, and defrosting is required.

[0075] Furthermore, before reducing the compressor's operating frequency, it is necessary to determine the temperature difference between the indoor ambient temperature and the set temperature, and reduce the compressor's operating frequency when the temperature difference is small, so as not to affect the user's demand for indoor heating.

[0076] Specifically, before step 202b3, step 202b may also include the following step 202b4:

[0077] Step 202b4: When the target pressure difference meets the target preset condition and the target temperature difference is greater than the preset temperature difference threshold, increase the flow rate of refrigerant in the outdoor unit to reduce the value corresponding to the target temperature difference.

[0078] For example, such as Figure 3As shown, the ambient temperature of the indoor environment is Tr, and the set temperature of the air conditioner is Ts. If |Tr-Ts|>2, then the flow rate of the refrigerant in the outdoor unit needs to be increased to improve the heating efficiency so that the ambient temperature of the indoor environment can quickly approach the set temperature.

[0079] For example, such as Figure 4 As shown, when |Tr-Ts|≤2, it indicates that the temperature difference between the indoor ambient temperature and the set temperature is small. Under this condition, reducing the operating frequency of the compressor has little impact on the user.

[0080] Optionally, in this embodiment of the application, when controlling the air conditioner to perform a target operation to determine whether the air conditioner needs to be defrosted, if it is determined by the target operation that the air conditioner does not need to be defrosted, then it is necessary to restore the operating parameters before the target operation was performed.

[0081] For example, after step 202b above, step 202 may further include the following steps 202d1 and 202d2:

[0082] Step 202d1: Determine whether the target pressure difference meets the target preset condition.

[0083] Step 202d2: If the target pressure difference does not meet the target preset condition, control the air conditioner to restore the operating parameters of the air conditioner to the state before the target operation was performed.

[0084] For example, such as Figure 4 As shown, when the outdoor unit fan speed is increased, if ΔP≤P0 is satisfied, the outdoor unit fan speed will be restored to normal, that is, the speed before the speed was increased; when the compressor operating frequency is reduced, if ΔP≤P0 is satisfied, the compressor operating frequency will be restored to normal.

[0085] Optionally, in this embodiment of the application, during the defrosting operation of the air conditioner, it can be determined whether the defrosting operation needs to be terminated by checking whether the target pressure difference meets the target preset condition.

[0086] For example, after step 203 above, the air conditioner control method provided in this application embodiment may further include the following steps 204 and 205:

[0087] Step 204: Determine whether the target pressure difference meets the target preset conditions.

[0088] Step 205: If the target pressure difference does not meet the target preset condition, control the air conditioner to stop the defrosting operation.

[0089] For example, such as Figure 4As shown, during the defrosting operation, if ΔP≤P0 is satisfied, the air conditioner will stop the defrosting operation; otherwise, the defrosting operation will continue.

[0090] The air conditioner control method provided in this application, when the air conditioner is in heating mode, acquires pressure parameters collected by a pressure sensor installed in the air duct of the outdoor heat exchanger; when the pressure parameters indicate that the pressure change in the air duct meets preset conditions, the air conditioner is controlled to perform a defrosting operation on the outdoor heat exchanger. In this way, by observing the pressure changes in the air duct, it is possible to accurately determine whether the frost condensed on the outdoor heat exchanger has reached a level that requires removal, and to perform a defrosting operation when the necessary removal conditions are met, thus avoiding the inconvenience caused to the user by frequent defrosting.

[0091] It should be noted that the air conditioner control method provided in this application embodiment can be executed by an air conditioner control device or a control module within the air conditioner control device for executing the air conditioner control method. This application embodiment uses the execution of the air conditioner control method by an air conditioner control device as an example to illustrate the air conditioner control device provided in this application embodiment.

[0092] It should be noted that, in the embodiments of this application, the air conditioner control methods shown in the accompanying drawings are all illustrated by way of example with reference to one of the accompanying drawings in the embodiments of this application. In specific implementation, the air conditioner control methods shown in the accompanying drawings of the above methods can also be implemented in conjunction with any other accompanying drawings shown in the above embodiments, which will not be elaborated here.

[0093] The air conditioner control device provided in this application is described below, and the air conditioner control method described below can be referred to in correspondence with the air conditioner control method described above.

[0094] Figure 5 This is a schematic diagram of the structure of an air conditioner control device provided in an embodiment of this application, as shown below. Figure 5 As shown, it specifically includes:

[0095] The acquisition module 501 is used to acquire pressure parameters collected by a pressure sensor installed in the air duct of the outdoor heat exchanger when the air conditioner is in heating mode; the control module 502 is used to control the air conditioner to perform a defrosting operation on the outdoor heat exchanger when the pressure parameters indicate that the pressure change in the air duct meets preset conditions.

[0096] Optionally, the device further includes: a determining module; the control module 502 is further configured to control the air conditioner to operate in heating mode for a first preset duration; the determining module is configured to determine the pressure parameter collected by the pressure sensor as a first pressure parameter; the determining module is further configured to determine the pressure parameter collected by the pressure sensor in real time after the air conditioner operates in heating mode for the first preset duration as a second pressure parameter.

[0097] Optionally, the acquisition module 501 is further configured to acquire a target pressure difference; the target pressure difference is the absolute value of the pressure difference between the second pressure parameter and the first pressure parameter; the control module 502 is specifically configured to control the air conditioner to perform a target operation when the target pressure difference meets a target preset condition; the control module 502 is further configured to control the air conditioner to perform a defrost operation on the outdoor heat exchanger after the air conditioner performs the target operation, if the target pressure difference meets the target preset condition; wherein, the target preset condition is that the target pressure difference is greater than a preset pressure difference threshold; the target operation includes at least one of the following: increasing the speed of the fan in the outdoor unit, reducing the operating frequency of the compressor, and increasing the flow rate of refrigerant in the outdoor unit.

[0098] Optionally, the control module 502 is specifically used to control the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for a second preset time when the target pressure difference meets the target preset condition.

[0099] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module 502 is specifically configured to reduce the operating frequency of the compressor when the target pressure difference meets the target preset condition and the target temperature difference is less than or equal to a preset temperature difference threshold; wherein, the target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature.

[0100] Optionally, the control module 502 is further configured to increase the flow rate of refrigerant in the outdoor unit to reduce the value corresponding to the target temperature difference when the target pressure difference meets the target preset condition and the target temperature difference is greater than the preset temperature difference threshold.

[0101] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module 502 is specifically configured to control the air conditioner to restore the operating parameters of the air conditioner to the state before the target operation was performed when the target pressure difference does not meet the target preset condition.

[0102] Optionally, the determining module is further configured to determine whether the target pressure difference meets the target preset condition; the control module 502 is further configured to control the air conditioner to stop the defrosting operation if the target pressure difference does not meet the target preset condition.

[0103] The air conditioner control device provided in this application acquires pressure parameters collected by a pressure sensor installed inside the air duct of the outdoor heat exchanger when the air conditioner is in heating mode. When the pressure parameters indicate that the pressure change inside the air duct meets preset conditions, the device controls the air conditioner to perform a defrosting operation on the outdoor heat exchanger. Thus, by monitoring the pressure changes inside the air duct, it is possible to accurately determine whether the frost condensed on the outdoor heat exchanger has reached a level that requires removal, and to perform a defrosting operation when the necessary removal conditions are met, thereby avoiding the inconvenience caused to the user by frequent defrosting.

[0104] Figure 6 An example is a schematic diagram of the physical structure of an electronic device (i.e., the air conditioner mentioned above), as shown below. Figure 6 As shown, the electronic device may include: a pressure sensor installed in the air duct of the outdoor unit, a processor 610, a communication interface 620, a memory 630, and a communication bus 640, wherein the processor 610, the communication interface 620, and the memory 630 communicate with each other through the communication bus 640. The processor 610 can call logical instructions in the memory 630 to execute an air conditioner control method, which includes: when the air conditioner is in heating mode, acquiring pressure parameters collected by the pressure sensor installed in the air duct of the outdoor heat exchanger; and when the pressure parameters indicate that the pressure change in the air duct meets preset conditions, controlling the air conditioner to perform a defrosting operation on the outdoor heat exchanger.

[0105] Furthermore, the logical instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0106] On the other hand, this application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the air conditioner control method provided by the above methods. The method includes: when the air conditioner is in heating mode, acquiring pressure parameters collected by a pressure sensor installed in the air duct of the outdoor heat exchanger; and when the pressure parameters indicate that the pressure change in the air duct meets preset conditions, controlling the air conditioner to perform a defrosting operation on the outdoor heat exchanger.

[0107] In another aspect, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the air conditioner control methods provided above, the method comprising: when the air conditioner is in heating mode, acquiring pressure parameters collected by a pressure sensor installed in the air duct of the outdoor heat exchanger; and when the pressure parameters indicate that the pressure change in the air duct meets preset conditions, controlling the air conditioner to perform a defrosting operation on the outdoor heat exchanger.

[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0109] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An air conditioner control method, characterized in that, include: If the target pressure difference at the current moment meets the target preset condition, control the air conditioner to increase the speed of the fan in the outdoor unit and continue to run for the second preset time. The target preset condition is that the target pressure difference at the current moment is greater than a preset pressure difference threshold. The target pressure difference is the absolute value of the pressure difference between the first pressure parameter and the second pressure parameter; the first pressure parameter is the pressure parameter collected by the pressure sensor installed in the air duct of the outdoor heat exchanger after the air conditioner has been running in heating mode for a first preset time; the second pressure parameter is the pressure parameter collected in real time by the pressure sensor after the air conditioner has been running in heating mode for the first preset time. After running for the second preset duration, if the target pressure difference at the current moment meets the target preset condition, and if the target temperature difference is less than or equal to the preset temperature difference threshold, the compressor's operating frequency is reduced; otherwise, the refrigerant flow rate in the outdoor unit is increased until the target temperature difference is less than or equal to the preset temperature difference threshold, at which point the compressor's operating frequency is reduced. The target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature. After reducing the compressor's operating frequency, if the target pressure difference at the current moment meets the target preset condition, the air conditioner is controlled to perform a defrosting operation on the outdoor heat exchanger.

2. The method according to claim 1, characterized in that, After reducing the operating frequency of the compressor, the method further includes: Determine whether the target pressure difference meets the target preset condition; If the target pressure difference does not meet the target preset condition, the air conditioner is controlled to restore its operating parameters to the level before the compressor's operating frequency was reduced.

3. The method according to claim 2, characterized in that, After controlling the air conditioner to perform a defrost operation on the outdoor heat exchanger, the method further includes: Determine whether the target pressure difference meets the target preset condition; If the target pressure difference does not meet the target preset condition, the air conditioner is controlled to stop the defrosting operation.

4. An air conditioner control device, characterized in that, The device includes: The control module is used to control the air conditioner to increase the speed of the fan in the outdoor unit and continue to run it for a second preset time when the target pressure difference meets the target preset condition; the target preset condition is that the target pressure difference is greater than a preset pressure difference threshold; the target pressure difference is the absolute value of the pressure difference between a first pressure parameter and a second pressure parameter; the first pressure parameter is the pressure parameter collected by a pressure sensor installed in the air duct of the outdoor heat exchanger after the air conditioner has been running in heating mode for a first preset time; the second pressure parameter is the pressure parameter collected in real time by the pressure sensor after the air conditioner has been running in heating mode for the first preset time. The control module is also configured to, after continuous operation for the second preset duration, if the target pressure difference at the current moment meets the target preset condition, and if the target temperature difference is less than or equal to a preset temperature difference threshold, reduce the operating frequency of the compressor; otherwise, increase the flow rate of refrigerant in the outdoor unit until the target temperature difference is less than or equal to the preset temperature difference threshold, and then reduce the operating frequency of the compressor; the target temperature difference is the absolute value of the difference between the ambient temperature of the indoor unit of the air conditioner and the set temperature; The control module is also used to control the air conditioner to perform a defrost operation on the outdoor heat exchanger if the target pressure difference at the current moment meets the target preset condition after reducing the operating frequency of the compressor.

5. An air conditioner, comprising an indoor unit and an outdoor unit, characterized in that, It also includes a pressure sensor, a memory, a processor, and a computer program stored in the memory and executable on the processor. The pressure sensor is disposed in the air duct of the outdoor unit, and the processor executes the program to implement the steps of the air conditioner control method as described in any one of claims 1 to 3.

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