Air conditioner control method, air conditioner and storage medium

Abstract

Disclosed in the present application are an air conditioner control method, an air conditioner and a storage medium. The method comprises: when an air conditioner is in a preset defrosting mode, controlling an indoor fan corresponding to an indoor heat exchanger in the air conditioner to turn off; and when a preset condition is met after the indoor fan is turned off, controlling the indoor fan to turn on, wherein the preset defrosting mode is configured to defrost an outdoor heat exchanger of the air conditioner, and in the preset defrosting mode, the indoor heat exchanger is in a heating state.

Description

Air conditioner control methods, air conditioners and storage media

[0001] This application claims priority to Chinese patent application No. 202411029009.5, filed on July 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of air conditioning technology, and in particular to control methods for air conditioners, air conditioners, and storage media. Background Technology

[0003] During low-temperature heating operation, air conditioners typically activate defrost mode to defrost the outdoor heat exchanger when certain conditions are met.

[0004] Currently, when an air conditioner is in defrost mode, the indoor heat exchanger usually switches to evaporation mode. During this process, the indoor fan is turned off, and the air conditioner stops delivering heat to the indoor environment. This can easily lead to large fluctuations in indoor temperature, affecting indoor comfort. Technical issues

[0005] The main objective of this application is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to reduce indoor temperature fluctuations during the defrosting process and improve indoor comfort during the defrosting process. Technical solutions

[0006] To achieve the above objectives, this application proposes a control method for an air conditioner, the method comprising:

[0007] When the air conditioner is in the preset defrost mode, the indoor fan corresponding to the indoor heat exchanger in the air conditioner is turned off.

[0008] When the indoor fan is turned off to meet the preset conditions, the indoor fan is turned on.

[0009] The preset defrosting mode is set to defrost the outdoor heat exchanger of the air conditioner, and the indoor heat exchanger is in heating mode in the preset defrosting mode.

[0010] In some embodiments, the preset conditions include at least one of the following:

[0011] The indoor fan is shut off for a set duration.

[0012] The temperature of the indoor heat exchanger is greater than the first preset temperature.

[0013] In some embodiments, after the step of controlling the indoor fan to turn on, the method further includes:

[0014] When the temperature of the indoor heat exchanger is less than or equal to the second preset temperature, the indoor fan is controlled to shut down.

[0015] The second preset temperature is lower than the first preset temperature.

[0016] In some embodiments, after the step of controlling the indoor fan to turn on, the method further includes:

[0017] The indoor fan is kept on until the air conditioner exits the preset defrosting mode.

[0018] In some embodiments, the method further includes:

[0019] When the air conditioner starts the preset defrosting mode, the operating speed of the indoor fan is adjusted according to the temperature of the indoor heat exchanger;

[0020] When the air conditioner meets the first condition, the indoor fan is controlled to reduce its speed.

[0021] When the indoor fan slows down and runs until the second condition is met, the step of controlling the indoor fan corresponding to the indoor heat exchanger in the air conditioner to shut down is executed.

[0022] In some embodiments, the step of adjusting the operating speed of the indoor fan according to the temperature of the indoor heat exchanger includes:

[0023] The operating speed of the indoor fan is adjusted according to the temperature of the indoor heat exchanger within a preset speed range;

[0024] The steps for controlling the indoor fan to reduce its speed include:

[0025] Control the indoor fan to reduce its speed to the first rotational speed;

[0026] The steps of controlling the indoor fan to turn on include:

[0027] Control the indoor fan to start at the second speed;

[0028] Wherein, the rotational speed within the preset rotational speed range is greater than the first rotational speed, and the first rotational speed is greater than the second rotational speed.

[0029] In some embodiments, the air conditioner includes a compressor, a reversing assembly, an indoor heat exchanger, an electronic expansion valve, and an outdoor heat exchanger, wherein the indoor heat exchanger, the electronic expansion valve, and the outdoor heat exchanger are connected in sequence, and the compressor's exhaust port, the compressor's return port, the indoor heat exchanger, and the outdoor heat exchanger are all connected to the reversing assembly. Before the step of controlling the indoor fan corresponding to the indoor heat exchanger to shut down when the air conditioner is in a preset defrosting mode, the method further includes:

[0030] Control the reversing assembly to operate in a first state so that the exhaust port is connected to the indoor heat exchanger and the return port is connected to the outdoor heat exchanger; control the electronic expansion valve to operate at a throttling opening.

[0031] When the air conditioner operates to the point where the preset defrosting mode start-up conditions are met, the reversing assembly is controlled to maintain the first state of operation, and the electronic expansion valve is controlled to increase its opening.

[0032] In some embodiments, the activation conditions include at least one of the following:

[0033] The operating time of the air conditioner is longer than the preset time.

[0034] The temperature change rate of the outdoor heat exchanger is greater than the preset change rate.

[0035] The outdoor ambient temperature is within the set temperature range corresponding to the preset frost thickness.

[0036] In some embodiments, the process of controlling the commutation assembly to operate in a first state and controlling the electronic expansion valve to operate at a throttling opening further includes:

[0037] Control the compressor to operate at a heating frequency;

[0038] During the execution of the steps of controlling the commutation component to maintain the first state and controlling the electronic expansion valve to increase its opening, the method further includes:

[0039] Control the compressor to operate at the defrosting frequency;

[0040] The defrosting frequency is less than the heating frequency.

[0041] Furthermore, to achieve the above objectives, this application also proposes an air conditioner comprising a control device and an indoor fan, wherein the control device and the indoor fan are connected, and the control device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the air conditioner as described above.

[0042] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the air conditioner control method described above. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] To more clearly illustrate the technical solutions in the embodiments of 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a schematic diagram of the system structure of an embodiment of the air conditioner of this application;

[0046] Figure 2 is a schematic diagram of the hardware operating environment involved in the control method of the air conditioner in this application embodiment;

[0047] Figure 3 is a flowchart illustrating an embodiment of the control method for an air conditioner.

[0048] Figure 4 is a schematic diagram of the indoor fan speed change during the defrosting stage in one embodiment of the control method of the air conditioner of this application;

[0049] Figure 5 is a schematic diagram of the indoor fan speed change during the defrosting stage in another embodiment of the control method of the air conditioner of this application;

[0050] Figure 6 is a flowchart illustrating an embodiment of the control method for the air conditioner of this application.

[0051] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Embodiments of the present invention

[0052] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0053] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0054] The main solution of this application embodiment is: when the air conditioner is in a preset defrosting mode, control the indoor fan corresponding to the indoor heat exchanger in the air conditioner to turn off; when the indoor fan is turned off to meet the preset conditions, control the indoor fan to turn on; wherein, the preset defrosting mode is set to defrost the outdoor heat exchanger of the air conditioner, and the indoor heat exchanger is in a heating state in the preset defrosting mode.

[0055] In some embodiments, for ease of description, the following description uses an air conditioner as the implementing entity.

[0056] In current technology, when an air conditioner is in defrost mode, the indoor heat exchanger usually switches to evaporation mode. During this process, the indoor fan is turned off, and the air conditioner stops delivering heat to the indoor environment. This can easily lead to large fluctuations in indoor temperature and affect indoor comfort.

[0057] This application provides the above-mentioned solution, in which the indoor heat exchanger maintains heating mode during the defrosting process of the air conditioner, the indoor fan is first turned off to ensure the defrosting effect, and then the indoor fan is restarted, which can effectively increase the heat supply to the room during the defrosting process, thereby ensuring the defrosting effect while reducing indoor temperature fluctuations during the defrosting process and improving indoor comfort. Furthermore, restarting the fan can effectively prevent the indoor heat exchanger temperature from becoming too high in the post-defrosting stage, thus improving the operational reliability of the air conditioner during the defrosting process.

[0058] This application provides an air conditioner. The air conditioner may include any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, or a ceiling-mounted air conditioner.

[0059] In this embodiment of the application, referring to Figures 1 and 2, the air conditioner includes a control device 100, a compressor 1, a reversing assembly 2, an indoor heat exchanger 7, an electronic expansion valve 4, and an outdoor heat exchanger 3. The indoor heat exchanger 7, the electronic expansion valve 4, and the outdoor heat exchanger 3 are connected in sequence. The exhaust port of the indoor heat exchanger 7, the outdoor heat exchanger 3, and the return port of the compressor 1 are all connected to the reversing assembly 2. An indoor fan 8 is correspondingly provided for the indoor heat exchanger 7. The compressor 1, the reversing assembly 2, the electronic expansion valve 4, and the indoor fan 8 are all connected to the control device 100.

[0060] The reversing assembly 2 may include a four-way valve, etc. The reversing assembly 2 has a first state and a second state to switch between different refrigerant flow directions. When the reversing assembly 2 is running in the first state, the exhaust port of the compressor 1 is connected to the outdoor heat exchanger 3, and the return port of the compressor 1 is connected to the indoor heat exchanger 7. The refrigerant flowing out of the compressor 1 flows sequentially through the outdoor heat exchanger 3, the electronic expansion valve 4, and the indoor heat exchanger 7 before returning to the compressor 1. When the reversing assembly 2 is running in the second state, the exhaust port of the compressor 1 is connected to the indoor heat exchanger 7, and the return port of the compressor 1 is connected to the outdoor heat exchanger 3. The refrigerant flowing out of the compressor 1 flows sequentially through the indoor heat exchanger 7, the electronic expansion valve 4, and the outdoor heat exchanger 3 before returning to the compressor 1.

[0061] Based on the above settings, the operating modes of an air conditioner include at least the following:

[0062] In heating mode, the reversing assembly 2 operates in the second state, the electronic expansion valve 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.

[0063] In the first defrosting mode, the reversing assembly 2 operates in the second state, the electronic expansion valve 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 condensation state, and the outdoor heat exchanger 3 releases heat to melt the frost in its space.

[0064] In the second defrosting mode, the reversing assembly 2 operates in the second state, the electronic expansion valve 4 operates at the third opening degree, the second opening degree is greater than or equal to the third opening degree, the compressor 1 operates at the second defrosting frequency, the first defrosting frequency is greater than the second defrosting frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 is in the heat release state, and the space in which it is located is frosted.

[0065] In cooling mode, the reversing assembly 2 operates in the first state, the electronic expansion valve 4 operates at the fourth opening degree, the compressor 1 operates at the cooling frequency, the indoor heat exchanger 7 is in the evaporation state, and the outdoor heat exchanger 3 is in the condensation state.

[0066] In the third defrosting mode, the reversing assembly 2 operates in the first state, the electronic expansion valve 4 operates at the fifth opening degree, the compressor 1 operates at the third defrosting frequency, the indoor heat exchanger 7 is in the evaporation state, and the outdoor heat exchanger 3 is in the condensation state, releasing heat to melt the frost in its space.

[0067] In the first defrost mode, the frost thickness is greater than that in the second defrost mode, and in the third defrost mode, the frost thickness is greater than that in the first defrost mode. When the air conditioner switches from heating mode to the first or second defrost mode, the commutator 2 does not need to reverse, and the indoor heat exchanger 7 remains in a heat-releasing state. The temperature of the refrigerant flowing into the outdoor heat exchanger 3 is increased by increasing the opening of the electronic expansion valve 4, thereby melting the frost on the outdoor heat exchanger 3. This process effectively reduces the noise generated by the commutator 2 during switching and reduces temperature fluctuations in the indoor environment. When the air conditioner switches from heating mode to the third defrost mode, the commutator 2 needs to reverse, the indoor heat exchanger 7 is in an evaporating state, and the outdoor heat exchanger switches to a condensing state. The high-temperature refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 for defrosting.

[0068] In some embodiments, the second and third opening degrees are the maximum opening degrees of the electronic expansion valve 4. In other embodiments, the second and third opening degrees may also be opening degrees smaller than the maximum opening degree and larger than the first opening degree.

[0069] In some embodiments, referring to FIG1, the air conditioner further includes a refrigerant heat dissipation assembly 5 and a one-way throttling valve 6. The refrigerant heat dissipation assembly 5 is configured to dissipate heat from the heat-generating components in the air conditioner. The outdoor heat exchanger 3, the electronic expansion valve 4, the refrigerant heat dissipation assembly 5, the one-way throttling valve 6, and the indoor heat exchanger 7 are connected in sequence. The one-way throttling valve 6 is configured to throttle the refrigerant in one direction when it flows from the refrigerant heat dissipation assembly 5 to the indoor heat exchanger 7, and not throttle the refrigerant when it flows from the indoor heat exchanger 7 to the refrigerant heat dissipation assembly 5.

[0070] Referring to FIG2, the control device 100 of the air conditioner includes: at least one processor 1001; and a memory 1002 communicatively connected to the at least one processor 1001, and a timer 1003, etc.; wherein the memory 1002 stores instructions that can be executed 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.

[0071] Referring now to FIG2, a schematic diagram of a control device 100 suitable for implementing embodiments of this application is shown. The air conditioner in this application embodiment may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The control device 100 shown in FIG2 is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0072] As shown in Figure 2, the control device 100 may include a processor 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in memory 1002. The program in memory 1002 may be a program in read-only memory (ROM) or a program loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device 100. The processor 1001 and memory 1002 (ROM and RAM) are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices including, for example, magnetic tapes, hard disks, etc.; and communication devices. The communication device allows the control device 100 to communicate wirelessly or wiredly with other devices to exchange data. Although the control unit 100 with various systems is shown in the figure, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0073] Specifically, according to the embodiments disclosed in this application, the method flows described in the following embodiments can be implemented as a computer software program. For example, the embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from memory 1002. When the computer program is executed by processor 1001, it performs the functions defined in the control method for an air conditioner according to the embodiments disclosed in this application.

[0074] The air conditioner provided in this application, employing the control method of the air conditioner in the following embodiments, can solve the problem of how to improve indoor temperature stability and heat exchange effect. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as the beneficial effects of the control method of the air conditioner provided in the following embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the previous embodiment, and will not be repeated here.

[0075] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or air conditioner capable of performing the above functions. The following description uses an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0076] Based on this, the present application provides a control method for an air conditioner. Referring to FIG3, FIG3 is a flowchart of an embodiment of the control method for an air conditioner of the present application.

[0077] In some embodiments, the control method of the air conditioner includes steps S10 to S20:

[0078] Step S10: When the air conditioner is in the preset defrosting mode, control the indoor fan corresponding to the indoor heat exchanger in the air conditioner to turn off; the preset defrosting mode is set to defrost the outdoor heat exchanger of the air conditioner, and the indoor heat exchanger is in the heating state in the preset defrosting mode.

[0079] In some embodiments, the preset defrost mode is the defrost mode when the air conditioner is in heating mode, which may specifically include the first defrost mode or the second defrost mode described above.

[0080] When the air conditioner reaches the defrosting start condition during heating operation, the preset defrosting mode here will be activated.

[0081] The indoor fan here can be turned off immediately when the air conditioner starts the preset defrost mode, or it can be kept on for a period of time after the air conditioner starts the preset defrost mode before being turned off.

[0082] Step S20: When the indoor fan is turned off to meet the preset conditions, control the indoor fan to turn on.

[0083] The preset conditions indicate that the temperature of the indoor heat exchanger is greater than or equal to the temperature threshold and / or the frost thickness of the outdoor heat exchanger is less than the preset thickness, etc.

[0084] Preset conditions may include the required conditions to be met, such as the shutdown duration of the indoor fan and / or the status parameters of the indoor heat exchanger and / or the status parameters of the outdoor heat exchanger.

[0085] In some embodiments, the preset conditions include at least one of the following:

[0086] The indoor fan is shut off for a set duration.

[0087] The temperature of the indoor heat exchanger is greater than the first preset temperature.

[0088] The set duration and / or the first preset temperature can be fixed parameters that are set in advance, or parameters that are based on the actual operating status of the air conditioner. For example, the set duration and the first preset temperature can be determined based on the temperature of the indoor heat exchanger and / or the temperature of the outdoor heat exchanger and / or the ambient temperature when the air conditioner starts the preset defrosting mode.

[0089] When the indoor fan is turned on, it can operate at a preset fixed speed, such as to minimize the defrosting frequency. Alternatively, the indoor fan can operate at a speed determined by the actual operating conditions of the air conditioner, for example, based on the current temperatures of the outdoor and indoor heat exchangers.

[0090] This embodiment provides a control method for an air conditioner. In this method, the indoor heat exchanger maintains heating during the defrosting process, while the indoor fan is initially shut down to ensure effective defrosting. Restarting the indoor fan afterwards effectively increases the heat supply to the room during defrosting, thus ensuring effective defrosting while reducing indoor temperature fluctuations and improving indoor comfort. Furthermore, restarting the fan effectively prevents excessively high temperatures in the indoor heat exchanger after defrosting, thereby improving the operational reliability of the air conditioner during the defrosting process.

[0091] In some embodiments, referring to FIG4, after step S20, the method further includes: when the temperature of the indoor heat exchanger is less than or equal to the second preset temperature, controlling the indoor fan to shut down;

[0092] The second preset temperature is lower than the first preset temperature.

[0093] The second preset temperature can be determined based on the difference between the first preset temperature and the preset hysteresis temperature.

[0094] For example, the first preset temperature is 56℃, and the second preset temperature is 54℃.

[0095] In some embodiments, after step S30, step S20 can be returned to be executed until the air conditioner exits the preset defrosting mode.

[0096] In some embodiments, after the indoor fan is turned on, the indoor fan is turned off when the temperature of the indoor heat exchanger is too low. This helps to make full use of the heat before the defrosting process ends, reduce indoor temperature fluctuations, and prevent the air conditioner from blowing cold air into the indoor space, thereby further improving indoor comfort during the defrosting process.

[0097] In some embodiments, referring to FIG5, after step S20, the method further includes: controlling the indoor fan to remain on until the air conditioner exits the preset defrosting mode.

[0098] In some embodiments, this method helps to reduce frequent start-stop cycles indoors and lower indoor noise levels.

[0099] Based on any of the above embodiments, in some embodiments, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. In addition, referring to Figures 4 to 6, the method further includes:

[0100] Step S101: When the air conditioner starts the preset defrosting mode, the operating speed of the indoor fan is adjusted according to the temperature of the indoor heat exchanger.

[0101] Different indoor heat exchanger temperatures correspond to different indoor fan operating states. Specifically, the indoor fan speed is positively correlated with the indoor heat exchanger temperature.

[0102] The correspondence between the temperature of the indoor heat exchanger and the operating speed of the indoor fan is preset. This correspondence may include calculation relationships, mapping relationships, etc. Based on this correspondence, the target speed of the indoor fan corresponding to the temperature of the indoor heat exchanger can be determined, and the indoor fan can be controlled to run at the target speed.

[0103] In some embodiments, the operating speed of the indoor fan can be determined based on the temperature change trend of the indoor heat exchanger and the current temperature value. For example, a target correspondence is determined corresponding to the temperature change trend, the target correspondence including at least two preset speeds and a temperature range corresponding to each preset speed; the temperature range containing the current temperature value is determined as the target range; and the preset speed corresponding to the target range is determined as the target speed.

[0104] When the temperature change trend is an upward trend, the first correspondence is determined as the target correspondence; when the temperature change trend is a downward trend, the second correspondence is determined as the target correspondence; wherein, the temperature range corresponding to the preset rotation speed in the first correspondence is defined as the first range, and the temperature range corresponding to the preset rotation speed in the second correspondence is defined as the second range, and the minimum temperature in the first range is greater than the minimum temperature in the second range.

[0105] In some embodiments, the target correspondence between the temperature change trend and the target correspondence is determined according to the preset defrosting mode. Different preset defrosting modes have different correspondences between the temperature change trend and the target correspondence. Specifically, in the first defrosting mode, the temperature range corresponding to the lowest speed of the indoor fan is smaller than the temperature range corresponding to the lowest speed of the indoor fan in the second defrosting mode.

[0106] In the first defrosting mode, at least two preset rotation speeds are 0, A1, B1, C1, D1, and E1, respectively, from smallest to largest. T2AUP1, T2AUP2, T2AUP3, T2AUP4, and T2AUP5 serve as the critical values ​​for the first correspondence in the first defrosting mode, dividing the system into multiple first intervals. Similarly, T2ADOWN1, T2ADOWN2, T2ADOWN3, T2ADOWN4, and T2ADOWN5 serve as the critical values ​​for the second correspondence in the first defrosting mode, dividing the system into multiple second intervals. Based on this, the specific correspondence between the indoor heat exchanger temperature and the preset rotation speed under different temperature change trends is as follows:

[0107] Warming trend:

[0108] When T2≥T2AUP1(28℃), DEFROST _JSX2=A1;

[0109] When T2≥T2AUP2(30℃), DEFROST _JSX2=B1;

[0110] When T2≥T2AUP3(54℃), DEFROST _JSX2=C1;

[0111] When T2≥T2AUP4(56℃), DEFROST _JSX2=D1;

[0112] When T2≥T2AUP5(58℃), DEFROST _JSX2=E1;

[0113] Cooling trend:

[0114] When T2 < T2ADOWN5 (57℃), DEFROST _JSX2 = D1;

[0115] When T2 < T2ADOWN4 (55℃), DEFROST _JSX2 = C1;

[0116] When T2 < T2ADOWN3 (53℃), DEFROST _JSX2 = B1;

[0117] When T2 < T2ADOWN2 (29℃), DEFROST _JSX2 = A1;

[0118] When T2 < T2AUP1 (28℃), DEFROST _JSX2 = 0.

[0119] In the second defrosting mode, at least two preset rotation speeds are 0, A2, B2, C2, D2, and E2, respectively, from smallest to largest. T2BUP1, T2BUP2, T2BUP3, T2BUP4, and T2BUP5 serve as the critical values ​​in the first correspondence of the second defrosting mode, dividing the system into multiple first intervals. Similarly, T2BDOWN1, T2BDOWN2, T2BDOWN3, T2BDOWN4, and T2BDOWN5 serve as the critical values ​​in the second correspondence of the second defrosting mode, dividing the system into multiple second intervals. Based on this, the specific correspondence between the indoor heat exchanger temperature and the preset rotation speed under different temperature change trends is as follows:

[0120] Warming trend:

[0121] When T2≥T2BUP1(28℃), DEFROST _JSX2=A2;

[0122] When T2≥T2BUP2(54℃), DEFROST _JSX2=B2;

[0123] When T2≥T2BUP3(56℃), DEFROST _JSX2=C2;

[0124] When T2≥T2BUP4(58℃), DEFROST _JSX2=D2;

[0125] Cooling trend:

[0126] When T2<T2BDOWN4(57℃), DEFROST _JSX2=C2;

[0127] When T2<T2BDOWN3(55℃), DEFROST _JSX2=B2;

[0128] When T2<T2BDOWN2(53℃), DEFROST _JSX2=A2;

[0129] When T2 < T2BUP1 (28℃), DEFROST _JSX2 = 0.

[0130] Step S102: When the air conditioner meets the first condition, control the indoor fan to reduce its speed.

[0131] In some embodiments, when the duration of entering the preset defrost mode reaches a first duration, it is determined that the air conditioner meets the first condition. In this embodiment, the first duration is determined based on the temperature change rate of the outdoor heat exchanger when the preset defrost mode is activated. In other embodiments, the first duration may also be a preset fixed duration.

[0132] In some embodiments, the indoor fan is controlled to slow down to a first speed at a preset rate and maintain the first speed until the second condition is met.

[0133] Step S103: When the indoor fan slows down and runs until the second condition is met, the step of controlling the indoor fan corresponding to the indoor heat exchanger in the air conditioner to shut down is executed.

[0134] The second condition includes the indoor fan slowing down for a period of time. The slowing down period is counted from the moment the indoor fan starts to slow down when the first condition is met, including the phase of the speed continuously decreasing and the phase of maintaining the first speed.

[0135] In some embodiments, after entering the preset defrosting mode, the operating speed of the indoor fan is controlled in stages as described above. This can maintain the heat supply to the indoor unit while increasing the heat provided to the outdoor heat exchanger for defrosting, thereby effectively improving the defrosting rate. When the indoor fan slows down to meet the second condition, it is shut down to ensure that the outdoor heat exchanger has sufficient heat to melt the frost, further improving the defrosting effect. Based on this, this embodiment achieves an effective balance between improving indoor comfort and improving defrosting efficiency through the above-described method.

[0136] In some embodiments, the step of adjusting the operating speed of the indoor fan according to the temperature of the indoor heat exchanger includes: adjusting the operating speed of the indoor fan according to the temperature of the indoor heat exchanger within a preset speed range; the step of controlling the indoor fan to reduce its speed includes: controlling the indoor fan to operate at a first speed; the step of controlling the indoor fan to turn on includes: controlling the indoor fan to turn on at a second speed; wherein the speed within the preset speed range is greater than the first speed, and the first speed is greater than the second speed.

[0137] In some embodiments, setting the indoor fan speed in the manner described above is beneficial for further improving the balance between defrosting effect and indoor comfort.

[0138] Based on any of the above embodiments, in some embodiments, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. On this basis, the air conditioner includes a compressor, a reversing assembly, the indoor heat exchanger, an electronic expansion valve, and the outdoor heat exchanger. The indoor heat exchanger, the electronic expansion valve, and the outdoor heat exchanger are connected in sequence. The exhaust port of the compressor, the return port of the compressor, the indoor heat exchanger, and the outdoor heat exchanger are all connected to the reversing assembly. Before the step of controlling the indoor fan corresponding to the indoor heat exchanger to shut down when the air conditioner is in a preset defrosting mode, the method further includes:

[0139] Control the reversing assembly to operate in a first state so that the exhaust port is connected to the indoor heat exchanger and the return port is connected to the outdoor heat exchanger; control the electronic expansion valve to operate at a throttling opening.

[0140] When the air conditioner operates to the point where the preset defrosting mode start-up conditions are met, the reversing assembly is controlled to maintain the first state of operation, and the electronic expansion valve is controlled to increase its opening.

[0141] In some embodiments, the activation conditions include at least one of the following:

[0142] The operating time of the air conditioner is longer than the preset time.

[0143] The temperature change rate of the outdoor heat exchanger is greater than the preset change rate.

[0144] The outdoor ambient temperature is within the set temperature range corresponding to the preset frost thickness.

[0145] When the preset defrost mode includes either the first defrost mode or the second defrost mode, the preset change rate and the set temperature range corresponding to the first defrost mode and the second defrost mode are different, respectively. The preset change rate corresponding to the first defrost mode is less than the preset change rate corresponding to the second defrost mode, and the set temperature range corresponding to the first defrost mode is less than the set temperature range corresponding to the second defrost mode.

[0146] In some embodiments, the preset defrosting mode is the first defrosting mode. When the air conditioner meets the start conditions of the first defrosting mode, the air conditioner is controlled to start the first defrosting mode and the indoor fan is controlled to run in the manner described above. When the air conditioner meets the start conditions of the second defrosting mode, the indoor fan is turned off and remains off until it exits the second defrosting mode.

[0147] In some embodiments, by combining the air conditioner's operating time, the temperature status parameters of the outdoor heat exchanger, and the outdoor ambient temperature, it is possible to accurately identify whether there is a need for defrosting during the air conditioner's heating operation. When there is a need for defrosting, the heating defrosting mode is used in a timely manner to defrost, thereby reducing indoor temperature fluctuations and improving user comfort while ensuring that the frost on the outdoor heat exchanger is completely melted to improve the air conditioner's heating effect.

[0148] The process of controlling the commutation assembly to operate in a first state and controlling the electronic expansion valve to operate at a throttling opening further includes: controlling the compressor to operate at a heating frequency; the process of controlling the commutation assembly to maintain the first state operation and controlling the electronic expansion valve to increase its opening further includes: controlling the compressor to operate at a defrosting frequency; wherein the defrosting frequency is less than the heating frequency.

[0149] The defrosting frequency can be a preset fixed frequency or a frequency determined based on the actual operating conditions of the air conditioner. For example, the defrosting frequency can be determined based on the outdoor heat exchanger temperature and the current operating status of the indoor fan.

[0150] This helps to ensure the defrosting effect of the outdoor heat exchanger while improving the reliability of system operation.

[0151] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the air conditioner in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0152] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the air conditioner control method of the above embodiments.

[0153] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In some embodiments, the computer-readable storage medium may 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 may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0154] The aforementioned computer-readable storage medium may be included in the air conditioner; or it may exist independently and not be installed in the air conditioner.

[0155] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the air conditioner, cause the air conditioner to perform the following process: when the air conditioner is in a preset defrost mode, control the indoor fan corresponding to the indoor heat exchanger in the air conditioner to turn off; when the indoor fan is turned off to meet a preset condition, control the indoor fan to turn on; wherein, the preset defrost mode is set to defrost the outdoor heat exchanger of the air conditioner, and the indoor heat exchanger is in a heating state in the preset defrost mode.

[0156] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0157] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the air conditioner described above. This program can solve the technical problem of how to reduce indoor temperature fluctuations during defrosting and improve indoor comfort during the defrosting process. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method of the air conditioner provided in the above embodiments, and will not be repeated here.

[0158] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should 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 using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0159] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. Modules described in the embodiments of this application can be implemented in software or hardware. The names of modules do not necessarily limit the specific unit itself. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0160] The above descriptions are merely some embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the content of this specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application. Therefore, the protection scope of this application should be determined by the scope of the claims.

Claims

1. A control method of an air conditioner, wherein, The method comprises: In the case that the air conditioner is in a preset defrosting mode, the indoor fan corresponding to the indoor heat exchanger in the air conditioner is controlled to be closed; When the indoor fan is closed to meet a preset condition, the indoor fan is controlled to be opened; The preset defrosting mode is set to defrost the outdoor heat exchanger of the air conditioner, and the indoor heat exchanger is in a heating state in the preset defrosting mode.

2. The method of claim 1, wherein, The preset condition comprises at least one of the following: The closing time length of the indoor fan reaches a set time length; The temperature of the indoor heat exchanger is greater than a first preset temperature.

3. The method of claim 1 or 2, wherein, After the step of controlling the indoor fan to be opened, the method further comprises: When the temperature of the indoor heat exchanger is less than or equal to a second preset temperature, the indoor fan is controlled to be closed; The second preset temperature is less than the first preset temperature.

4. The method of any one of claims 1 to 3, wherein, After the step of controlling the indoor fan to be opened, the method further comprises: The indoor fan is controlled to be maintained to be opened until the air conditioner exits the preset defrosting mode.

5. The method of any one of claims 1 to 4, wherein, The method further comprises: When the air conditioner starts the preset defrosting mode, the running speed of the indoor fan is adjusted according to the temperature of the indoor heat exchanger; When the air conditioner meets a first condition, the indoor fan is controlled to run at a reduced speed; When the indoor fan runs at the reduced speed to meet a second condition, the step of controlling the indoor fan corresponding to the indoor heat exchanger in the air conditioner to be closed is executed.

6. The method of claim 5, wherein, The step of adjusting the running speed of the indoor fan according to the temperature of the indoor heat exchanger comprises: The running speed of the indoor fan is adjusted according to the temperature of the indoor heat exchanger in a preset speed interval; The step of controlling the indoor fan to run at a reduced speed comprises: The indoor fan is controlled to run at a first speed; The step of controlling the indoor fan to be opened comprises: The indoor fan is controlled to be opened at a second speed; The speed in the preset speed interval is greater than the first speed, and the first speed is greater than the second speed.

7. The method of any one of claims 1 to 6, wherein, The air conditioner comprises a compressor, a reversing assembly, the indoor heat exchanger, an electronic expansion valve and the outdoor heat exchanger, the indoor heat exchanger, the electronic expansion valve and the outdoor heat exchanger are connected in sequence, the exhaust port of the compressor, the gas return port of the compressor, the indoor heat exchanger and the outdoor heat exchanger are connected with the reversing assembly, before the step of controlling the indoor fan corresponding to the indoor heat exchanger in the air conditioner to be closed in the case that the air conditioner is in a preset defrosting mode, the method further comprises: The reversing assembly is controlled to run in a first state to make the exhaust port communicate with the indoor heat exchanger, the gas return port communicate with the outdoor heat exchanger, and the electronic expansion valve is controlled to run at a throttling opening degree; When the air conditioner runs to meet the starting condition of the preset defrosting mode, the reversing assembly is controlled to maintain the first state to run, and the electronic expansion valve is controlled to run at an increased opening degree.

8. The method of claim 7, wherein, The starting condition comprises at least one of the following: The running time length of the air conditioner is greater than a preset time length; The temperature variation rate of the outdoor heat exchanger is greater than a preset variation rate; The outdoor environment temperature is located in a set temperature range corresponding to a preset frost thickness.

9. The method of claim 7 or 8, wherein, The process of controlling the reversing assembly to operate in the first state and controlling the electronic expansion valve to operate at a throttling opening further comprises: controlling the compressor to operate at a heating frequency; The process of controlling the reversing assembly to maintain the first state and controlling the electronic expansion valve to increase the throttling opening further comprises: controlling the compressor to operate at a defrosting frequency; The defrosting frequency is less than the heating frequency.

10. An air conditioner wherein, The air conditioner comprises a control device and an indoor fan, the control device is connected with the indoor fan, and the control device comprises a memory, a processor and a computer program stored in the memory and executable on the processor. 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 9.

11. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program. When the computer program is executed by the processor, the steps of the control method of the air conditioner according to any one of claims 1 to 9 are implemented.

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