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

Abstract

The present application relates to the technical field of air conditioners, and discloses a control method for an air conditioner, an air conditioner, and a storage medium. The air conditioner comprises at least two outdoor heat exchangers and corresponding outdoor fans, and the at least two outdoor heat exchangers are arranged side by side. The method comprises: controlling the air conditioner to operate in a heating mode; and when the air conditioner meets a defrosting condition, controlling the operation of the air conditioner under a defrosting parameter, and controlling the outdoor fans to remain turned on, wherein an indoor heat exchanger of the air conditioner remains in a heat-releasing state during both the heating mode and the operation of the air conditioner under the defrosting parameter.

Description

Control method of air conditioner, air conditioner and storage medium

[0001] The present application claims priority to Chinese Patent Application No. 202411028982.5, filed on July 29, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of air conditioners, in particular to a control method of an air conditioner, an air conditioner and a storage medium. BACKGROUND

[0003] The outdoor unit of the air conditioner can be frosted during low-temperature heating, which affects the heating capacity. In the case of less frosting of the outdoor unit, the defrosting is generally performed in a thin frost rapid melting mode. In the process of thin frost rapid melting, the indoor unit can maintain heating and the outdoor fan is stopped. However, the outdoor unit has multiple rows of heat exchangers, the frosting thickness of the multiple rows of heat exchangers is aggravated, and the defrosting is difficult. The current thin frost rapid melting mode has the problem of poor defrosting effect. TECHNICAL PROBLEM

[0004] The main purpose of the present application is to provide a control method of an air conditioner, an air conditioner and a storage medium, which aims to improve the defrosting effect of multiple rows of heat exchangers in the air conditioner. TECHNICAL SOLUTION

[0005] To achieve the above purpose, the present application provides a control method of an air conditioner, the air conditioner comprising an outdoor heat exchanger and a corresponding outdoor fan, the outdoor heat exchanger comprising at least two heat exchange parts arranged side by side, the method comprising:

[0006] controlling the air conditioner to run in a heating mode;

[0007] controlling the air conditioner to run defrosting parameters in the case that the air conditioner meets defrosting conditions, and controlling the outdoor fan to maintain opening;

[0008] wherein the indoor heat exchanger of the air conditioner is in a heat releasing state during the heating mode and the process of running the defrosting parameters of the air conditioner.

[0009] In some embodiments, the step of controlling the outdoor fan to maintain opening further comprises:

[0010] controlling the outdoor fan to run according to the outdoor environment temperature and / or the heat exchanger temperature of the outdoor heat exchanger.

[0011] In some embodiments, the step of controlling the outdoor fan to run according to the outdoor environment temperature and / or the heat exchanger temperature comprises:

[0012] determining a target rotating speed of the outdoor fan according to the outdoor ambient temperature;

[0013] controlling the outdoor fan to operate at the target rotating speed.

[0014] In some embodiments, the step of determining the target rotating speed of the outdoor fan according to the outdoor ambient temperature comprises:

[0015] when the outdoor ambient temperature is greater than a preset ambient temperature, determining a first rotating speed as the target rotating speed;

[0016] when the outdoor ambient temperature is less than or equal to the preset ambient temperature, determining a second rotating speed as the target rotating speed;

[0017] wherein the first rotating speed is greater than the second rotating speed.

[0018] In some embodiments, the step of controlling the outdoor fan to operate according to the outdoor ambient temperature and / or the heat exchanger temperature comprises:

[0019] when the outdoor ambient temperature and the heat exchanger temperature satisfy a preset condition, controlling the outdoor fan to be turned off or to reduce the rotating speed;

[0020] wherein the preset condition indicates that the space where the outdoor heat exchanger is located is insufficient in heat.

[0021] In some embodiments, the preset condition comprises that a temperature difference between the heat exchanger temperature and the outdoor ambient temperature is greater than or equal to a preset temperature difference, or the outdoor ambient temperature is greater than or equal to a set temperature and the temperature difference between the heat exchanger temperature and the outdoor ambient temperature is greater than or equal to the preset temperature difference.

[0022] In some embodiments, before the step of controlling the outdoor fan to be turned off or to reduce the rotating speed when the outdoor ambient temperature and the heat exchanger temperature satisfy the preset condition, the method further comprises:

[0023] determining the preset temperature difference according to the outdoor ambient temperature, the preset temperature difference being negatively correlated with the outdoor ambient temperature.

[0024] In some embodiments, after the step of controlling the air conditioner to operate in the heating mode, the method further comprises:

[0025] when the air conditioner satisfies a defrosting condition, obtaining an outdoor temperature state;

[0026] when the outdoor temperature state does not satisfy a set condition, performing the step of controlling the air conditioner to operate in a defrosting mode and controlling the outdoor fan to be kept on;

[0027] In a case where the outdoor temperature state satisfies a set condition, the air conditioner is controlled to run a defrost parameter, and the outdoor fan is controlled to be turned off.

[0028] The set condition indicates that heat in a space where the outdoor heat exchanger is located is insufficient.

[0029] In some embodiments, the outdoor temperature state includes an outdoor temperature, and the set condition includes that the outdoor temperature is less than a set temperature.

[0030] In some embodiments, the step of controlling the air conditioner to run the defrost parameter includes:

[0031] Controlling a throttling device to increase to a defrost opening degree to run, the throttling device being arranged between the outdoor heat exchanger and the indoor heat exchanger, and the defrost parameter including the defrost opening degree.

[0032] In some embodiments, the step of controlling the air conditioner to run the defrost parameter further includes:

[0033] Controlling a corresponding indoor fan of the indoor heat exchanger to run at a defrost rotating speed; and / or,

[0034] Controlling a compressor of the air conditioner to run at a defrost frequency.

[0035] The defrost parameter further includes the defrost rotating speed and / or the defrost frequency.

[0036] In some embodiments, after the step of controlling the air conditioner to run in the heating mode, the method further includes:

[0037] In a case where the air conditioner satisfies a defrost condition, the throttling device is controlled to maintain a current opening degree to run, the indoor fan is controlled to decrease to a transition rotating speed to run, and the compressor is controlled to decrease in frequency to a transition frequency to run.

[0038] When the air conditioner runs to satisfy a first condition, the indoor fan is controlled to decrease to a defrost rotating speed to run.

[0039] When the air conditioner runs to satisfy a second condition, the step of controlling the air conditioner to run the defrost parameter is executed.

[0040] The transition frequency is greater than the defrost frequency, and the transition rotating speed is greater than the defrost rotating speed.

[0041] In some embodiments, the step of controlling the throttling device to increase to the defrost opening degree to run includes:

[0042] The throttling device is controlled to increase in opening degree to the defrost opening degree in a stepwise manner to run.

[0043] In addition, to achieve the above object, the application further provides an air conditioner, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the air conditioner.

[0044] In addition, to achieve the above object, the application further provides a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the control method of the air conditioner. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings constituting a part of this specification illustrate embodiments consistent with the present application and together with the specification serve to explain the principles of the present application.

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0047] Fig. 1 is a schematic diagram of the system structure of an embodiment of the air conditioner of the present application;

[0048] Fig. 2 is a schematic diagram of the device structure of the hardware running environment involved in the control method of the air conditioner in the embodiment of the present application;

[0049] Fig. 3 is a schematic diagram of the flow provided by an embodiment of the control method of the air conditioner of the present application;

[0050] Fig. 4 is a timing control diagram of the switching of the components involved in the control method of the air conditioner of the present application between the heating mode and the defrosting mode;

[0051] Fig. 5 is a schematic diagram of the flow provided by another embodiment of the control method of the air conditioner of the present application.

[0052] The object implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Embodiment of the present application

[0053] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0054] In order to better understand the technical solutions of the present application, the following will be described in detail in combination with the drawings and specific embodiments of the specification.

[0055] The main solution of the embodiment of the present application is: a control method is proposed based on an air conditioner, the air conditioner comprises at least two outdoor heat exchangers and corresponding outdoor fans, the at least two outdoor heat exchangers are arranged side by side, and the method comprises: controlling the air conditioner to run in a heating mode; in the case that the air conditioner meets defrosting conditions, controlling the air conditioner to run in a defrosting parameter, and controlling the outdoor fan to maintain opening; wherein, the indoor heat exchanger of the air conditioner in the heating mode and the defrosting parameter of the air conditioner both are in a heat releasing state.

[0056] In some embodiments, for convenience of description, the following is described taking an air conditioner as an execution subject.

[0057] In the prior art, in the case that the frosting of the outdoor unit is not too serious, a thin frost rapid melting mode is generally used for defrosting, and in the process of thin frost rapid melting, the indoor unit can maintain heating and the outdoor fan stops running. However, many outdoor units use multi-row heat exchangers, and the frosting thickness of the multi-row heat exchanger is aggravated, and the defrosting difficulty is large. At present, the thin frost rapid melting mode has the problem of poor defrosting effect.

[0058] The present application provides the above-mentioned solution. When the air conditioner needs to be defrosted in the heating mode, the outdoor fan is no longer stopped running but maintained in an open state during the defrosting process of the air conditioner. The opening of the outdoor fan can effectively enhance the heat transfer between the air side and the inner side of the outdoor heat exchanger coil, so as to fully utilize the heat of outdoor air energy, and effectively improve the defrosting effect of the multi-row heat exchanger in the air conditioner.

[0059] The embodiment of the present application proposes an air conditioner. The air conditioner can include any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, and a ceiling-mounted air conditioner.

[0060] In the embodiment of the present application, referring to FIGS. 1 and 2, the air conditioner comprises a control device 100, a compressor 1, a reversing assembly 2, an indoor heat exchanger 7, a throttling device 4, and an outdoor heat exchanger 3. The indoor heat exchanger 7, the throttling device 4, and the outdoor heat exchanger 3 are connected in sequence, and the indoor heat exchanger 7, the outdoor heat exchanger 3, the exhaust port of the compressor 1, and the gas inlet port of the compressor 1 are all connected with the reversing assembly 2. The indoor heat exchanger 7 is correspondingly provided with an indoor fan 8, and the outdoor heat exchanger 3 is correspondingly provided with an outdoor fan 9. The compressor 1, the reversing assembly 2, the throttling device 4, the outdoor fan 9, and the indoor fan 8 are all connected with the control device 100. The throttling device 4 can be an electronic expansion valve.

[0061] The outdoor heat exchanger 3 comprises at least two heat exchange units arranged side by side. In some embodiments, the at least two heat exchange units are arranged in series along the air flow direction driven by the outdoor fan 9. Specifically, in the embodiments of the present application, the outdoor heat exchanger 3 comprises two rows of heat exchangers arranged side by side in sequence along the air flow direction of the outdoor fan 9, and the two rows of heat exchangers are the two heat exchange units. When the air conditioner operates in the cooling mode or the heating mode, the refrigerant discharged by the compressor 1 flows through the two rows of heat exchangers in sequence.

[0062] The reversing assembly 2 can comprise a four-way valve or the like. The reversing assembly 2 has a first state and a second state to switch before the refrigerant flows in different directions. When the reversing assembly 2 operates in the first state, the discharge port of the compressor 1 is communicated with the outdoor heat exchanger 3, the return port of the compressor 1 is communicated with the indoor heat exchanger 7, and the refrigerant discharged by the compressor 1 flows through the outdoor heat exchanger 3, the throttling device 4 and the indoor heat exchanger 7 in sequence and then returns to the compressor 1; when the reversing assembly 2 operates in the second state, the discharge port of the compressor 1 is communicated with the indoor heat exchanger 7, the return port of the compressor 1 is communicated with the outdoor heat exchanger 3, and the refrigerant discharged by the compressor 1 flows through the indoor heat exchanger 7, the throttling device 4 and the outdoor heat exchanger 3 in sequence and then returns to the compressor 1.

[0063] Based on the above arrangement, the operation modes of the air conditioner at least include the following modes:

[0064] In the heating mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at the first opening degree, the compressor 1 operates at the heating frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 is in the evaporating state.

[0065] In the first defrosting mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at the second opening degree which is greater than the first opening degree, the compressor 1 operates at the first defrosting frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 melts the ice and frost in the space where it is located by releasing heat.

[0066] In the second defrosting mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at the third opening degree which is greater than or equal to the second opening degree, the compressor 1 operates at the second defrosting frequency which is less than the first defrosting frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 melts the ice and frost in the space where it is located by releasing heat.

[0067] In the cooling mode, the reversing assembly 2 operates in the first state, the throttling device 4 operates at the fourth opening degree, the compressor 1 operates at the cooling frequency, the indoor heat exchanger 7 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state.

[0068] The third defrosting mode, the reversing component 2 operates in the first state, the throttling device 4 operates in the fifth opening degree, the compressor 1 operates in the third defrosting frequency, the indoor heat exchanger 7 is in the evaporating state, and the outdoor heat exchanger 3 is in the condensing state to release heat and melt the ice and frost in the space.

[0069] The first defrosting mode corresponds to a larger frost thickness than the second defrosting mode, and the third defrosting mode corresponds to a larger frost thickness than the first defrosting mode. When the air conditioner switches from the heating mode to the first defrosting mode or the second defrosting mode, the reversing component 2 does not need to be reversed, the indoor heat exchanger 7 maintains the heat releasing state, and the temperature of the refrigerant flowing into the outdoor heat exchanger 3 is increased by increasing the opening degree of the throttling device 4 to melt the ice and frost on the outdoor heat exchanger 3. During this process, the noise generated when the reversing component 2 switches can be effectively reduced, and the temperature fluctuation of the indoor environment can be reduced. When the air conditioner enters the third defrosting mode from the heating mode, the reversing component 2 needs to be reversed, the indoor heat exchanger 7 is in the evaporating state, the outdoor heat exchanger is switched to the condensing state, and the high-temperature refrigerant discharged by the compressor 1 flows into the outdoor heat exchanger 3 for defrosting.

[0070] In some embodiments, the second opening degree and the third opening degree are the maximum opening degree of the throttling device 4. In other embodiments, the second opening degree and the third opening degree can also be an opening degree smaller than the maximum opening degree and larger than the first opening degree.

[0071] In some embodiments, referring to FIG. 1, the air conditioner further comprises a refrigerant heat dissipation component 5 and a one-way throttling device 6, the refrigerant heat dissipation component 5 is configured to dissipate heat from the heating components in the air conditioner. The outdoor heat exchanger 3, the throttling device 4, the refrigerant heat dissipation component 5, the one-way throttling device 6, and the indoor heat exchanger 7 are connected in sequence, and the one-way throttling device 6 is configured to throttle when the refrigerant flows from the refrigerant heat dissipation component 5 to the indoor heat exchanger 7, and not to throttle when the refrigerant flows from the indoor heat exchanger 7 to the refrigerant heat dissipation component 5.

[0072] The control device 100 of the air conditioner comprises at least one processor 1001, a memory 1002 and a timer 1003 in communication connection with the at least one processor 1001, and the like, wherein the memory 1002 stores instructions executable by the at least one processor 1001, and the instructions are executed by the at least one processor 1001 to enable the at least one processor 1001 to execute the control method of the air conditioner in the following embodiments.

[0073] Reference is now made to FIG. 2, which illustrates a structural diagram of a control apparatus 100 suitable for use in implementing embodiments of the present application. The air conditioner in embodiments of the present application can include, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Portable Application Description), a PMP (Portable Media Player), a car terminal (e.g., a car navigation terminal), and the like, as well as a stationary terminal such as a digital TV, a desktop computer, and the like. The control apparatus 100 illustrated in FIG. 2 is merely an example and should not impose any limitation on the functions and use range of embodiments of the present application.

[0074] As shown in FIG. 2, the control apparatus 100 can include a processor 1001 (e.g., a central processor, a graphic processor, etc.) that can perform various appropriate actions and processes according to programs stored in a memory 1002, which can be programs in a ROM (Read Only Memory) or programs loaded from a storage device into a RAM (Random Access Memory). In the RAM, various programs and data required for the operation of the control apparatus 100 are also stored. The processor 1001, the memory 1002 (ROM and RAM), and an I / O (Input / Output) interface are connected to each other through a bus. Generally, the following systems can be connected to the I / O interface: input devices including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, and the like; output devices including, for example, an LCD (Liquid Crystal Display), a speaker, a vibrator, and the like; storage devices including, for example, a magnetic tape, a hard disk, and the like; and communication devices. The communication devices can allow the control apparatus 100 to perform wireless or wired communication with other devices to exchange data. Although the control apparatus 100 having various systems is illustrated in the drawing, it is understood that all of the illustrated systems are not required to be implemented or provided. More or less systems can be alternatively implemented or provided.

[0075] In particular, according to the embodiments disclosed in the present application, the method flow described in the following embodiments can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product comprising a computer program carried on a computer readable medium, the computer program comprising program code for executing the method shown in the flow chart. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the memory 1002. When the computer program is executed by the processor 1001, the functions defined in the control method of the air conditioner of the embodiments disclosed in the present application are performed.

[0076] The air conditioner provided in the present application adopts the control method of the air conditioner in the following embodiments, which can solve the problem of how to improve the defrosting effect of the multiple-row heat exchanger in the air conditioner. Compared with the prior art, the air conditioner provided in the present application has the same beneficial effects as the control method of the air conditioner provided in the following embodiments, and other technical features in the air conditioner are the same as the features disclosed in the following embodiment method, which will not be repeated here.

[0077] It should be noted that the execution subject of the embodiments of the present application can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device, an air conditioner, etc. capable of realizing the above functions. The embodiments and the following embodiments will be described below with the air conditioner as an example.

[0078] Based on this, the embodiments of the present application provide a control method of an air conditioner, referring to FIG. 3 and FIG. 4, FIG. 3 is a flowchart of an embodiment of the control method of the air conditioner of the present application.

[0079] In the embodiments of the present application, the control method of the air conditioner comprises steps S10-S20:

[0080] Step S10, control the air conditioner to run in a heating mode;

[0081] During the process of the air conditioner running in the heating mode, the reversing component runs in the second state, the throttling device runs at the throttling opening, the compressor runs at a heating frequency, and the refrigerant discharged by the compressor flows back to the compressor in sequence through the indoor heat exchanger, the throttling device and the outdoor heat exchanger, the indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state.

[0082] Step S20, in the case that the air conditioner meets a defrosting condition, control the air conditioner to run in a defrosting parameter, and control the outdoor fan to maintain open, wherein the indoor heat exchanger of the air conditioner in the heating mode and the air conditioner running in the defrosting parameter is in a heat releasing state.

[0083] The defrosting parameter is an operating parameter of the air conditioner for the purpose of defrosting the ice and frost of the outdoor heat exchanger. The air conditioner is in the defrosting mode during the defrosting parameter process, and the defrosting parameter herein can include the operating parameter of each device in the first defrosting mode or the second defrosting mode described above.

[0084] The defrosting condition includes a condition required to be met by the operating parameter of the air conditioner itself and / or the environmental parameter of the environment where the air conditioner is located when the outdoor heat exchanger needs to be defrosted in the heating mode. For example, the outdoor environment temperature is lower than a preset environmental temperature threshold and / or the outdoor heat exchanger temperature is lower than a preset temperature threshold, etc.

[0085] The reversing assembly can be controlled to maintain the current state during the defrosting parameter process of the air conditioner.

[0086] The outdoor fan can increase the rotating speed, decrease the rotating speed, or maintain the current rotating speed when the outdoor fan is maintained in the open state. The rotating speed of the outdoor fan can be a fixed rotating speed set in advance, or a rotating speed determined according to the actual operating condition of the air conditioner.

[0087] The at least two outdoor heat exchangers include an outer heat exchanger and an inner heat exchanger. During the defrosting parameter process of the air conditioner, the refrigerant flows through the outer heat exchanger first and then flows into the inner heat exchanger. The airflow direction under the driving of the outdoor fan can be from the outer heat exchanger to the inner heat exchanger, or alternately between the first flow direction and the second flow direction. The first flow direction is from the outer heat exchanger to the inner heat exchanger, and the second flow direction is from the inner heat exchanger to the outer heat exchanger.

[0088] In some embodiments, when the air conditioner meets the defrosting condition and the outdoor environment temperature is within a preset temperature interval, the air conditioner is controlled to operate in the defrosting parameter, and the outdoor fan is controlled to maintain the open state. The temperature difference between the preset temperature interval and the freezing point temperature is less than a preset value. For example, the preset temperature interval is [-6℃, 6℃].

[0089] The embodiments of the present application provide a control method of an air conditioner. In the scheme, the air conditioner is provided with at least two outdoor heat exchangers arranged in parallel. When the air conditioner needs to be defrosted in the heating mode, the outdoor fan is not stopped during the defrosting process of the air conditioner in the heating mode, but is maintained in the open state. The opening of the outdoor fan can effectively enhance the heat transfer between the air side and the inner side of the outdoor heat exchanger coil, so as to fully utilize the heat of the outdoor air energy, and effectively improve the defrosting effect of the multiple-row heat exchangers in the air conditioner.

[0090] In order to make full use of the air energy of the outdoor environment to assist defrosting, the outdoor fan is kept on during defrosting. The heat transfer coefficient between the surface of the outdoor heat exchanger fins and the air is increased from 1-2 W / m2.K of natural convection to 30-40 W / m2.K, which greatly enhances the heat transfer capacity of the heat transfer path from the air to the fins to the pipe wall to the refrigerant, and provides the necessary conditions for the saturated refrigerant to quickly condense and release heat after entering the outdoor heat exchanger. Secondly, the opening of the outdoor fan can form a wind field of about 2.5 m / s in the gap between the outdoor heat exchanger fins, which can greatly accelerate the transformation of frost from solid crystalline state to liquid flow state, which is especially important for the outdoor heat exchanger located on the inside. Since the defrosting method adopted by the present application is to gradually defrost from the outside to the inside, the frost layer in the gap between the fins of the indoor heat exchanger must be accelerated to dissolve through air delivery, so as to complete the entire defrosting process in a short time. The defrosting effect is effectively improved.

[0091] Based on any of the above embodiments, in another embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above introduction, and will not be described in detail. On this basis, please refer to Figure 5, after step S20, the control method of the air conditioner further comprises step S30:

[0092] Step S30, controlling the operation of the outdoor fan according to the outdoor environment temperature and / or the heat exchanger temperature of the outdoor heat exchanger;

[0093] In some embodiments, the heat exchanger temperature is the refrigerant temperature at the outlet of the outdoor heat exchanger or the surface temperature of the outdoor heat exchanger. In other embodiments, the heat exchanger temperature can also include the temperature of different heat exchange parts in the outdoor heat exchanger. The outdoor environment temperature and the heat exchanger temperature of the outdoor heat exchanger can be the outdoor environment temperature and the heat exchanger temperature at the current time when the air conditioner is running; the outdoor environment temperature and the heat exchanger temperature of the outdoor heat exchanger can also be the outdoor environment temperature and the heat exchanger temperature obtained by the air conditioner when the air conditioner meets the defrosting condition. The outdoor fan is controlled to be closed or the rotating speed is adjusted or the running direction is adjusted according to the outdoor environment temperature and / or the heat exchanger temperature.

[0094] In one implementation, when the outdoor environment temperature and / or the heat exchanger temperature meet the preset condition, the outdoor fan is controlled to be closed. The preset condition can represent that the heat in the ambient air is insufficient, and the preset condition can include a target interval corresponding to the outdoor environment temperature and the heat exchanger temperature or a target relationship between the outdoor environment temperature and the heat exchanger temperature.

[0095] In another implementation, the rotating speed of the outdoor fan can be controlled according to at least one of the outdoor environment temperature and the heat exchanger temperature. For example, the rotating speed of the outdoor fan can be controlled according to the temperature difference between the outdoor environment temperature and the heat exchanger temperature.

[0096] In yet another implementation, the target rotating speed of the outdoor fan can be determined according to the outdoor ambient temperature and the heat exchanger temperature in a first direction and a second direction, the first direction being the direction in which the outdoor fan blows air towards the outdoor heat exchanger, and the second direction being the direction in which the outdoor fan blows air away from the outdoor heat exchanger.

[0097] In some embodiments, by the above manner, it can be ensured that there is sufficient heat to defrost the outdoor heat exchanger quickly under the regulation of the outdoor fan, and the defrosting efficiency can be effectively improved.

[0098] In an implementation, the step of controlling the operation of the outdoor fan according to the outdoor ambient temperature and / or the heat exchanger temperature comprises determining the target rotating speed of the outdoor fan according to the outdoor ambient temperature, and controlling the outdoor fan to operate at the target rotating speed.

[0099] Different outdoor ambient temperatures correspond to different target rotating speeds, and the target rotating speed is positively correlated with the outdoor ambient temperature. In an implementation, the target rotating speed can be determined according to the temperature interval in which the outdoor ambient temperature is located. In another implementation, the target rotating speed can be calculated by substituting the outdoor ambient temperature into a preset formula.

[0100] For example, the step of determining the target rotating speed of the outdoor fan according to the outdoor ambient temperature comprises: when the outdoor ambient temperature is greater than a preset ambient temperature, determining a first rotating speed as the target rotating speed; and when the outdoor ambient temperature is less than or equal to the preset ambient temperature, determining a second rotating speed as the target rotating speed; wherein the first rotating speed is greater than the second rotating speed.

[0101] In some embodiments, by the above manner, it can be effectively ensured that there is sufficient heat to defrost the multiple rows of heat exchangers under different working conditions, and different heat exchange parts in the outdoor heat exchanger can be defrosted quickly.

[0102] In another implementation, the step of controlling the operation of the outdoor fan according to the outdoor ambient temperature and / or the heat exchanger temperature comprises: when the outdoor ambient temperature and the heat exchanger temperature satisfy a preset condition, controlling the outdoor fan to be turned off or to reduce the rotating speed; wherein the preset condition indicates that the space in which the outdoor heat exchanger is located is insufficient in heat.

[0103] In some embodiments, the preset condition comprises that the temperature difference between the heat exchanger temperature and the outdoor ambient temperature is greater than or equal to a preset temperature difference. Alternatively, the preset condition comprises that the outdoor ambient temperature is greater than or equal to a set temperature, and the temperature difference between the heat exchanger temperature and the outdoor ambient temperature is greater than or equal to a preset temperature difference.

[0104] In some embodiments, when the space air heat is insufficient to defrost the outdoor heat exchanger, the outdoor fan is turned off or runs at a reduced speed, which is conducive to reducing the heat dissipation of the outdoor heat exchanger, so that more heat is retained in the area where the outdoor heat exchanger is located to improve the defrosting efficiency of the outdoor heat exchanger.

[0105] In other embodiments, the preset condition can also include that the outdoor ambient temperature is less than a set temperature.

[0106] In another possible implementation, after the step of controlling the outdoor fan to be turned off or to run at a reduced speed, the control method further comprises:

[0107] obtaining an outdoor ambient temperature and / or a heat exchanger temperature of the outdoor heat exchanger;

[0108] controlling the outdoor fan to run according to the outdoor ambient temperature and / or the heat exchanger temperature of the outdoor heat exchanger;

[0109] when the outdoor ambient temperature and the heat exchanger temperature do not satisfy the preset condition, controlling the outdoor fan to be turned on or to run at an increased speed;

[0110] wherein the preset condition indicates that the space where the outdoor heat exchanger is located is insufficient in heat.

[0111] In some embodiments, before the step of controlling the outdoor fan to be turned off or to run at a reduced speed when the outdoor ambient temperature and the heat exchanger temperature satisfy the preset condition, the control method further comprises: determining the preset temperature difference according to the outdoor ambient temperature, the preset temperature difference being negatively correlated with the outdoor ambient temperature.

[0112] For example, when the outdoor ambient temperature is greater than a preset ambient temperature, a first temperature difference is determined as the preset temperature difference; when the outdoor ambient temperature is less than or equal to the preset ambient temperature, a second temperature difference is determined as the preset temperature difference; and the first temperature difference is less than the second temperature difference. The preset ambient temperature here refers to the same concept as the preset ambient temperature described above, and the preset ambient temperature can be the freezing point temperature. The first temperature difference can be in the range of [0℃, 5℃], and the second temperature difference can be in the range of (5℃, 10℃].

[0113] In some embodiments, by setting the preset temperature difference in the above manner, it is conducive to ensuring that the heat exchange efficiency between air and different heat exchange parts of the outdoor heat exchanger is in a good state under different working conditions, and fully utilizing the heat in the air, thereby effectively improving the defrosting efficiency of the outdoor heat exchanger.

[0114] Based on any of the above embodiments, in yet another embodiment of the present application, after the step of controlling the air conditioner to run in the heating mode, the method further comprises: obtaining an outdoor temperature state when the air conditioner meets a defrosting condition; when the outdoor temperature state does not meet a set condition, performing the step of controlling the air conditioner to run in a defrosting parameter and controlling the outdoor fan to maintain open; when the outdoor temperature state meets the set condition, controlling the air conditioner to run in the defrosting parameter and controlling the outdoor fan to close; wherein the set condition indicates that the space where the outdoor heat exchanger is located is insufficient in heat.

[0115] In some embodiments, the outdoor temperature state comprises an outdoor temperature, and the set condition comprises that the outdoor temperature is less than a set temperature. Here, the outdoor temperature can be the same as the outdoor ambient temperature described above, or can be the temperature of the outdoor environment detected at a different time. In other embodiments, the outdoor temperature state can also comprise an outdoor temperature and a change trend of the outdoor temperature, and the set condition comprises that the temperature difference between the outdoor temperature and the set temperature is greater than a preset value and the outdoor temperature is in a downward trend.

[0116] In some embodiments, by the above method, it can be ensured that the outdoor space has sufficient heat for the outdoor heat exchanger to defrost, so that the outdoor fan will only be maintained open during the defrosting phase of the air conditioner, otherwise the outdoor fan will be closed during the defrosting phase, thereby effectively improving the defrosting efficiency of the outdoor heat exchanger.

[0117] Based on any of the above embodiments, in yet another embodiment of the present application, the same or similar contents as the above embodiments can be referred to the above description, and will not be described in detail hereinafter. On this basis, in combination with FIG. 4, the step of controlling the air conditioner to run in the defrosting parameter comprises: controlling the throttling device to increase to a defrosting opening degree, the throttling device is arranged between the outdoor heat exchanger and the indoor heat exchanger, and the defrosting parameter comprises the defrosting opening degree.

[0118] Here, the throttling device can increase the opening degree to the defrosting opening degree at a preset rate, or can increase the opening degree to the defrosting opening degree in a stepwise manner.

[0119] When the defrosting mode comprises a first defrosting mode, the throttling device increases from a first opening degree to a second opening degree, and the defrosting opening degree comprises the second opening degree; when the defrosting mode comprises a second defrosting mode, the throttling device increases from the first opening degree to a third opening degree, and the defrosting opening degree comprises the third opening degree.

[0120] In some embodiments, by increasing the opening degree of the throttling device, the throttling effect of the throttling device can be effectively reduced, the temperature of the refrigerant flowing out of the throttling device can be increased, and more refrigerant can absorb heat from the heat generating component at the refrigerant heat dissipation assembly, so that more heat carrying refrigerant can flow into the outdoor heat exchanger for defrosting, and the effect of thin frost melting can be achieved. When the opening degree of the throttling device is increased in steps to the defrosting opening degree, the indoor temperature comfort can be effectively improved, and the air conditioner running noise can be effectively reduced.

[0121] Based on any of the above embodiments, in combination with FIG. 4, the step of controlling the air conditioner to run the defrosting parameters further includes: controlling the indoor fan corresponding to the indoor heat exchanger to run at a defrosting speed; and / or, controlling the compressor of the air conditioner to run at a defrosting frequency; wherein the defrosting parameters further include the defrosting speed and / or the defrosting frequency.

[0122] During the process of increasing the opening degree of the throttling device, when the speed of the indoor fan is the defrosting speed, the indoor fan maintains the defrosting speed; when the speed of the indoor fan is greater than or less than the defrosting speed, the indoor fan is adjusted to run at the defrosting speed; when the frequency of the compressor is the defrosting frequency, the compressor maintains the defrosting frequency; when the frequency of the compressor is less than or greater than the defrosting frequency, the compressor is adjusted to run at the defrosting frequency.

[0123] In the case that the air conditioner meets the defrosting condition, the throttling device, the compressor and the indoor fan can be adjusted from the heating parameters in the heating mode to the corresponding defrosting parameters in stages, or can be directly adjusted from the heating parameters to the defrosting parameters.

[0124] By matching the respective defrosting parameters of the throttling device, the indoor fan and the compressor, the temperature of the outdoor heat exchanger can be increased to the defrosting temperature, so as to defrost the outdoor heat exchanger.

[0125] In some embodiments, by the above method, the defrosting efficiency of the outdoor heat exchanger can be further improved.

[0126] In some embodiments, after the step of controlling the air conditioner to run in the heating mode, the following steps are further included: in the case that the air conditioner meets the defrosting condition, controlling the throttling device to maintain the current opening degree, controlling the indoor fan to reduce to a transition speed, and controlling the compressor to reduce to a transition frequency; when the air conditioner runs to meet the first condition, controlling the indoor fan to reduce to a defrosting speed; when the air conditioner runs to meet the second condition, controlling the indoor fan to maintain the defrosting speed, and executing the step of controlling the air conditioner to run the defrosting parameters; wherein the transition frequency is greater than the defrosting frequency, and the transition speed is greater than the defrosting speed.

[0127] The outdoor temperature and the outdoor ambient temperature mentioned in the above embodiments can be detected during the process that the indoor fan runs at the transition rotation speed, the compressor runs at the transition frequency, and the throttling device maintains the current opening degree.

[0128] The first condition and the second condition can include that the running time reaches the corresponding set time length or that a control instruction is received, etc.

[0129] In some embodiments, before the air conditioner enters the defrosting phase, the indoor fan is reduced to the transition rotation speed, which is beneficial for heat accumulation for the defrosting phase, the compressor is reduced to the transition frequency, which is beneficial for avoiding that the indoor heat exchanger temperature is too high, and the throttling device maintains the current opening degree, which is beneficial for reducing the noise generated when the throttling device is adjusted simultaneously with the fan and the compressor, based on which, it is beneficial to improve the defrosting effect while ensuring the reliability of the air conditioner and reducing the operation noise.

[0130] After the indoor fan, the compressor and the throttling device all run at the corresponding defrosting parameters, when the air conditioner meets the defrosting end condition, each component can be controlled to restore to the corresponding parameters in the heating mode, wherein the process that the compressor and the throttling device restore to the corresponding parameters in the heating mode is adjusted in a stepwise manner.

[0131] It should be noted that the above examples are only used for understanding the present application and do not constitute a limitation on the control method of the air conditioner of the present application, and more forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0132] The present application provides a computer readable storage medium having computer readable program instructions (i.e. computer programs) stored thereon, the computer readable program instructions being used to execute the control method of the air conditioner in the above embodiments.

[0133] The computer readable storage medium provided in the application may, for example, be a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable storage medium can include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In some embodiments, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination of the above.

[0134] The above computer readable storage medium can be contained in the air conditioner; or can exist separately without being assembled into the air conditioner.

[0135] The above computer readable storage medium carries one or more programs, which, when executed by the air conditioner, cause the air conditioner to perform the following processes: controlling the air conditioner to run in a heating mode; when the air conditioner meets a defrosting condition, controlling the air conditioner to run in a defrosting parameter, and controlling the outdoor fan of the air conditioner to maintain opening; wherein the indoor heat exchanger of the air conditioner is in a heat releasing state during the heating mode and the process of the air conditioner running in the defrosting parameter.

[0136] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0137] The readable storage medium provided by the present application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer program) for executing the control method of the air conditioner, and can solve the technical problem of how to improve the defrosting effect of the multi-row heat exchanger in the air conditioner. Compared with the prior art, the computer readable storage medium provided by the present application has the same beneficial effects as the control method of the air conditioner provided by the above-mentioned embodiments, which will not be repeated here.

[0138] The flowcharts and block diagrams in the drawings illustrate the possible architectures, functionality, and operations of systems, methods, and computer program products according to various embodiments of the present application. In this regard, each block in the flowcharts or block diagrams can represent a module, a segment, or a portion of code, which comprises one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur out of the order noted in the figures. For example, two blocks noted in succession can in fact be executed substantially concurrently or in the reverse order, depending on the functionality involved. It will also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by dedicated hardware-based systems that perform the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions.

[0139] It should be understood that each part of the present application can be realized by hardware, software, firmware or a combination thereof. The modules described in the embodiments of the present application can be realized by software or hardware. In some cases, the name of the module does not constitute a limitation on the module itself. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0140] The above only describes some embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A control method of an air conditioner, wherein, The air conditioner comprises an outdoor heat exchanger and a corresponding outdoor fan, the outdoor heat exchanger comprises at least two heat exchange parts arranged side by side, and the method comprises the following steps: controlling the air conditioner to run in a heating mode; in the case that the air conditioner meets defrosting conditions, controlling the air conditioner to run in a defrosting parameter, and controlling the outdoor fan to maintain opening; wherein, the indoor heat exchanger of the air conditioner in the heating mode and the defrosting parameter is in a heat releasing state.

2. The method of claim 1, wherein, After the step of controlling the outdoor fan to maintain opening, the method further comprises the following steps: controlling the outdoor fan to run according to the outdoor environment temperature and / or the heat exchanger temperature of the outdoor heat exchanger.

3. The method of claim 2, wherein, The step of controlling the outdoor fan to run according to the outdoor environment temperature and / or the heat exchanger temperature comprises the following steps: determining a target rotating speed of the outdoor fan according to the outdoor environment temperature; controlling the outdoor fan to run at the target rotating speed.

4. The method of claim 3, wherein, The step of determining the target rotating speed of the outdoor fan according to the outdoor environment temperature comprises the following steps: when the outdoor environment temperature is greater than a preset environment temperature, determining a first rotating speed as the target rotating speed; when the outdoor environment temperature is less than or equal to the preset environment temperature, determining a second rotating speed as the target rotating speed; wherein, the first rotating speed is greater than the second rotating speed.

5. The method of any one of claims 2 to 4, wherein, The step of controlling the outdoor fan to run according to the outdoor environment temperature and / or the heat exchanger temperature comprises the following steps: when the outdoor environment temperature and the heat exchanger temperature meet a preset condition, controlling the outdoor fan to close or reduce the rotating speed; wherein, the preset condition indicates that the space where the outdoor heat exchanger is located is insufficient in heat.

6. The method of claim 5, wherein, The preset condition comprises that the temperature difference between the heat exchanger temperature and the outdoor environment temperature is greater than or equal to a preset temperature difference, or the outdoor environment temperature is greater than or equal to a set temperature and the temperature difference between the heat exchanger temperature and the outdoor environment temperature is greater than or equal to a preset temperature difference.

7. The method of claim 6, wherein, Before the step of controlling the outdoor fan to close or reduce the rotating speed when the outdoor environment temperature and the heat exchanger temperature meet the preset condition, the method further comprises the following steps: determining the preset temperature difference according to the outdoor environment temperature, and the preset temperature difference is negatively correlated with the outdoor environment temperature.

8. The method of any one of claims 1 to 7, wherein, After the step of controlling the air conditioner to run in the heating mode, the method further comprises the following steps: in the case that the air conditioner meets defrosting conditions, obtaining an outdoor temperature state; in the case that the outdoor temperature state does not meet a set condition, executing the step of controlling the air conditioner to run in the defrosting parameter and controlling the outdoor fan to maintain opening; in the case that the outdoor temperature state meets the set condition, controlling the air conditioner to run in the defrosting parameter and controlling the outdoor fan to close; wherein, the set condition indicates that the space where the outdoor heat exchanger is located is insufficient in heat.

9. The method of claim 8, wherein, The outdoor temperature state comprises an outdoor temperature, and the set condition comprises that the outdoor temperature is less than a set temperature.

10. The method of any one of claims 1 to 9, wherein, The step of controlling the air conditioner to run in the defrosting parameter comprises the following steps: The control throttling device is increased to defrost opening degree operation, the throttling device is arranged between the outdoor heat exchanger and the indoor heat exchanger, and the defrost parameter includes the defrost opening degree.

11. The method of claim 10, wherein, The step of controlling the air conditioner to operate the defrost parameter further includes: Controlling the corresponding indoor fan of the indoor heat exchanger to operate at a defrost rotating speed; and / or, Controlling the compressor of the air conditioner to operate at a defrost frequency; The defrost parameter further includes the defrost rotating speed and / or the defrost frequency.

12. The method of claim 11, wherein, The method further includes the following steps after the step of controlling the air conditioner to operate in the heating mode: If the air conditioner meets the defrost condition, the throttling device is controlled to maintain the current opening degree operation, the indoor fan is controlled to reduce to a transition rotating speed operation, and the compressor is controlled to reduce to a transition frequency operation; When the air conditioner operates to meet the first condition, the indoor fan is controlled to reduce to the defrost rotating speed operation; When the air conditioner operates to meet the second condition, the step of controlling the air conditioner to operate the defrost parameter is executed; The transition frequency is greater than the defrost frequency, and the transition rotating speed is greater than the defrost rotating speed.

13. The method of any one of claims 10 to 12, wherein, The step of controlling the throttling device to increase to the defrost opening degree operation includes: The throttling device is controlled to increase to the defrost opening degree operation in a step-by-step manner.

14. An air conditioner, wherein, The air conditioner includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the air conditioner according to any one of claims 1 to 13.

15. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the air conditioner according to any one of claims 1 to 13.

Images