Air conditioner defrosting control method and device, storage medium and air conditioner

Abstract

The invention relates to an air conditioner defrosting control method and device, a storage medium and an air conditioner. When the air conditioner is in a heating mode, the working state information of multiple indoor heat exchangers of the air conditioner is obtained in response to a defrosting instruction, and when it is determined that at least one indoor heat exchanger is not in a working state according to the working state information, the defrosting instruction is sent to the air conditioner. The air conditioner is controlled to enter a first defrosting mode; in the first defrosting mode, a refrigerant is controlled to flow to the outdoor heat exchanger and the indoor heat exchanger in the working state for heat release, the refrigerant after heat release flows through the indoor heat exchanger not in the working state for heat absorption, and the indoor heating effect can be guaranteed while defrosting of the outdoor heat exchanger is achieved; and the user experience is improved.

Description

Technical Field

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

[0002] When the air conditioner is running in heating mode, due to the low outdoor temperature, the surface temperature of the outdoor unit's heat exchanger (evaporator) will drop below 0 degrees, which will cause the moisture in the air to condense into frost on its surface. If the frost layer is too thick, it will hinder the air flow and increase the air flow resistance, thereby reducing the heat exchange efficiency and affecting the heating capacity of the air conditioner. At this time, the air conditioner needs to be defrosted to maintain its heating efficiency and avoid equipment damage.

[0003] Traditional air conditioners need to rely on indoor heat exchangers to absorb heat during defrosting, which can easily cause the temperature on the indoor side to drop, affecting the user experience. Summary of the invention

[0004] The embodiments of the present application provide an air conditioner defrost control method, device, storage medium and air conditioner, which can achieve defrosting of an outdoor heat exchanger while increasing the indoor temperature, thereby improving the user experience.

[0005] In a first aspect, an embodiment of the present application provides a defrost control method for an air conditioner, wherein the air conditioner includes at least one indoor heat exchanger and an outdoor heat exchanger, and the method includes the following steps:

[0006] When the air conditioner is in a heating mode, in response to a defrost instruction, obtaining working state information of the at least one indoor heat exchanger;

[0007] If it is determined according to the working state information that at least one indoor heat exchanger is not in working state, controlling the air conditioner to enter a first defrosting mode;

[0008] In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger not in working state to absorb heat.

[0009] In a second aspect, an embodiment of the present application provides a defrost control device for an air conditioner, wherein the air conditioner includes at least one indoor heat exchanger and an outdoor heat exchanger, and the device includes:

[0010] a working state information acquisition module, configured to acquire working state information of the at least one indoor heat exchanger in response to a defrost instruction when the air conditioner is in a heating mode;

[0011] A first defrost module, configured to control the air conditioner to enter a first defrost mode if it is determined according to the working state information that at least one indoor heat exchanger is not in a working state;

[0012] In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger not in working state to absorb heat.

[0013] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the air conditioner defrost control method as described in any one of the above.

[0014] In a fourth aspect, an embodiment of the present application provides an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable by the processor;

[0015] When the processor executes the computer program, the steps of the air conditioner defrost control method as described in any one of the above are implemented.

[0016] In an embodiment of the present application, by responding to a defrost instruction when the air conditioner is in a heating mode, the working status information of multiple indoor heat exchangers of the air conditioner is obtained, and when it is determined according to the working status information that at least one indoor heat exchanger is not in a working state, the air conditioner is controlled to enter a first defrost mode; in the first defrost mode, the refrigerant is controlled to flow to the outdoor heat exchanger and the indoor heat exchanger in a working state respectively to release heat, and the refrigerant after heat release flows through the indoor heat exchanger that is not in a working state to absorb heat, so that the indoor heating effect can be guaranteed while achieving defrosting of the outdoor heat exchanger, thereby improving the user experience.

[0017] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flowchart of an air conditioner defrosting control method according to an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of an air conditioner in one embodiment of the present invention;

[0020] Figure 3 A schematic diagram of the structure of an air conditioner in another embodiment of the present invention;

[0021] Figure 4 A flow chart of an air conditioner defrosting control method according to another embodiment of the present invention;

[0022] Figure 5A flow chart of an air conditioner defrosting control method according to another embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of an air conditioner in another embodiment of the present invention;

[0024] Figure 7 It is a structural schematic diagram of a defrost control device for an air conditioner according to an embodiment of the present invention;

[0025] Figure 8 The figure is a schematic diagram of the structure of an air conditioner in one embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0027] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0028] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0029] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0030] In addition, in the description of this application, unless otherwise specified, "several" means two or more. "And / or" describes the corresponding relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0031] The air conditioner includes an indoor heat exchanger and an outdoor heat exchanger. The indoor heat exchanger is used to achieve indoor heat exchange, and the outdoor heat exchanger is used to achieve outdoor heat exchange.

[0032] When the air conditioner is working in heating mode, the internal refrigerant releases heat in the indoor heat exchanger, causing the indoor temperature to rise, and absorbs heat from the air in the outdoor heat exchanger. However, due to the low outdoor temperature, the surface temperature of the outdoor heat exchanger will drop below 0 degrees, which will cause the moisture in the air to condense into frost on its surface. If the frost layer is too thick, it will hinder the air flow and increase the air flow resistance, thereby reducing the heat exchange efficiency and affecting the heating capacity of the air conditioner.

[0033] At this time, the outdoor heat exchanger needs to be defrosted to maintain the heating efficiency of the air conditioner and avoid damage to the air conditioner.

[0034] When a traditional air conditioner is defrosted, the refrigerant releases heat in the outdoor heat exchanger and absorbs heat in the indoor heat exchanger, causing the indoor temperature to drop and affecting the user experience.

[0035] Therefore, in response to the above-mentioned problems, the present application provides an air conditioner defrost control method, which can be applied to an air conditioner having at least one indoor heat exchanger and one outdoor heat exchanger. When the air conditioner is in heating mode and receives a defrost command, by obtaining the working status information of multiple indoor heat exchangers of the air conditioner, and determining according to the working status information that at least one indoor heat exchanger is not in a working state, the air conditioner is controlled to enter a first defrost mode; in the first defrost mode, heat is released by controlling the refrigerant to flow to the outdoor heat exchanger and the indoor heat exchanger in a working state respectively, thereby achieving defrosting of the outdoor heat exchanger and increasing the indoor temperature, and the present application also achieves refrigerant circulation by allowing the refrigerant after heat release to flow through the indoor heat exchanger that is not in a working state to absorb heat.

[0036] See also Figure 2 , an air conditioner defrost control method provided by an embodiment of the present application specifically includes:

[0037] S110: When the air conditioner is in a heating mode, in response to a defrost instruction, obtaining working state information of the at least one indoor heat exchanger;

[0038] The defrost instruction is used to control the air conditioner to enter the defrost mode, thereby achieving defrosting of the outdoor heat exchanger of the air conditioner.

[0039] The defrost instruction may be a control instruction issued by a user, or the defrost instruction may be an instruction automatically generated by the air conditioner when the defrost conditions are met.

[0040] The defrost condition can be set according to the actual operating environment of the air conditioner. For example, the defrost condition can be set to set the temperature of the outdoor heat exchanger to be lower than the target temperature threshold. The target temperature threshold can be determined according to the frosting temperature and time.

[0041] The working state information is used to determine whether each indoor heat exchanger is in a working state. Being in a working state may mean that the indoor heat exchanger is in a powered-on state or in a heating mode operation state.

[0042] The indoor heat exchangers can be distributed in different areas of the room, such as in different rooms. The working states of the indoor heat exchangers in different areas may be different. For example, for an area that does not require heating, the indoor heat exchanger in this area may not be in a working state, and for an area that requires heating, the indoor heat exchanger in this area may be in a working state.

[0043] S120: If it is determined according to the working state information that at least one indoor heat exchanger is not in working state, controlling the air conditioner to enter the first defrosting mode;

[0044] The heat exchanger is not in the working state, that is, the heat exchanger is in the shutdown state.

[0045] The first defrost mode can be used to achieve defrosting of the outdoor heat exchanger and ensure the stability of the indoor temperature by utilizing the indoor heat exchanger in the area that does not require heating to absorb heat, thereby providing heat for defrosting the outdoor heat exchanger and the indoor heat exchanger in the area that requires heating.

[0046] In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger which is not in working state to absorb heat, thereby achieving defrosting of the outdoor heat exchanger while ensuring the indoor heating effect.

[0047] Controlling the refrigerant to flow through the outdoor heat exchanger and the indoor heat exchanger in operation can be achieved by connecting a passage between the refrigerant and the outdoor heat exchanger and a passage between the refrigerant and the indoor heat exchanger in operation.

[0048] When the refrigerant is output by the compressor, the flow direction of the refrigerant can be controlled by connecting the passage between the compressor and the outdoor heat exchanger and the passage between the compressor and the indoor heat exchanger in working state.

[0049] Optionally, a multi-way valve with multiple ports can be provided at the refrigerant output port of the compressor, and each port of the multi-way valve is connected to multiple refrigerant transmission pathways. By adjusting the guidance of the multi-way valve, different refrigerant transmission pathways can be switched to achieve control of different flow directions of the refrigerant in the air conditioner.

[0050] Controlling the refrigerant after heat release to flow through the indoor heat exchanger that is not in a working state can be achieved by connecting the refrigerant output end of the outdoor heat exchanger and the refrigerant output end of the indoor heat exchanger in a working state and the passage between the indoor heat exchanger that is not in a working state.

[0051] In an embodiment of the present application, when the air conditioner is in a heating mode and receives a defrost command, by obtaining the working status information of multiple indoor heat exchangers of the air conditioner, and determining according to the working status information that at least one indoor heat exchanger is not in a working state, the air conditioner is controlled to enter a first defrost mode; in the first defrost mode, heat is released by controlling the refrigerant to flow to the outdoor heat exchanger and the indoor heat exchanger in a working state respectively, and heat is absorbed by the refrigerant after the heat release flowing through the indoor heat exchanger which is not in a working state, thereby realizing the circulation of the refrigerant. The present application can realize the defrosting of the outdoor heat exchanger while avoiding the impact of defrosting on the indoor temperature, thereby ensuring the indoor heating effect and improving the user experience.

[0052] See also Figure 2 , which is a schematic diagram of the structure of an air conditioner in one embodiment; Figure 2 As shown, the air conditioner includes a compressor 1, a four-way valve 22, an outdoor heat exchanger 2, a first heat storage indoor unit, a second heat storage indoor unit and a common indoor heat exchanger 13;

[0053] In the embodiment of the present application, the first thermal storage indoor unit and the second thermal storage indoor unit can be three-pipe indoor units, the first thermal storage indoor unit includes a first upper heat exchanger 11 and a first lower heat exchanger 11', and the second thermal storage indoor unit includes a second upper heat exchanger 12 and a second lower heat exchanger 12'.

[0054] In the embodiment of the present application, it is determined according to the working status information that the first heat storage indoor unit is in working state, the second heat storage indoor unit and the common indoor heat exchanger 13 are not in working state, and the air conditioner is in the first defrost mode.

[0055] The four-way valve 22 is used to connect the compressor 1 with a first passage of the outdoor heat exchanger 2, and the compressor 1 is connected with the first lower heat exchanger 11' through a second passage.

[0056] The refrigerant discharged from the high-pressure chamber of the compressor 1 is divided into two paths, one of which enters the outdoor heat exchanger 2 through the first path to release heat, and the other enters the first lower heat exchanger 11' of the first thermal storage indoor unit through the second path to release heat. The refrigerant after heat release flows through the second upper heat exchanger 12 of the second thermal storage indoor unit which is not in working state and the ordinary indoor heat exchanger 13 to absorb heat.

[0057] In one embodiment, the air conditioner may further include an electronic expansion valve 8 arranged at the refrigerant input port of the second upper heat exchanger 12 and an electronic expansion valve 10 arranged at the refrigerant input port of the common indoor heat exchanger 13, the electronic expansion valve 8 being used to throttle the refrigerant input to the second upper heat exchanger 12, and the electronic expansion valve 10 being used to throttle the refrigerant of the common indoor heat exchanger 13.

[0058] In one embodiment, the air conditioner may further include a four-way valve 23 and a gas-liquid separator 24. The refrigerant after absorbing heat in the second upper heat exchanger 12 and the common indoor heat exchanger 13 enters the gas-liquid separator 24 through the four-way valve 23 and is sucked into the compressor 1, thereby realizing the circulation of the refrigerant.

[0059] In step S120, when there is at least one indoor heat exchanger that is not in a working state, the air conditioner is controlled to enter the first defrost mode, and the indoor heat exchanger that is not in a working state is used to defrost the outdoor heat exchanger and provide heat for the indoor heat exchanger that is in a working state, thereby ensuring the indoor heating effect and the outdoor defrosting effect.

[0060] In one embodiment, the method further comprises the following steps:

[0061] If it is determined according to the working status information that all indoor heat exchangers are in working state, the air conditioner is controlled to enter the second defrost mode; in the second defrost mode, the refrigerant flows through the outdoor heat exchanger to release heat, and the refrigerant after heat release flows through the indoor heat exchanger to absorb heat.

[0062] Specifically, the refrigerant can be controlled to flow through the outdoor heat exchanger by connecting the refrigerant to the outdoor heat exchanger. When the refrigerant is output by the compressor, the refrigerant can be controlled to flow through the outdoor heat exchanger by connecting the compressor to the outdoor heat exchanger.

[0063] In an embodiment of the present application, when all indoor heat exchangers are in working condition, the air conditioner is controlled to enter the second defrost mode, so that the refrigerant flows to the outdoor heat exchanger to release heat, thereby defrosting the outdoor heat exchanger, and then the indoor heat exchanger is used to absorb heat to realize the circulation of the refrigerant.

[0064] See also Figure 3 , which is a structural diagram of an air conditioner in another embodiment of the present application; Figure 3As shown, the air conditioner includes a compressor 1, a four-way valve 22-23, an outdoor heat exchanger 2, a first heat storage indoor unit, a second heat storage indoor unit, a common indoor heat exchanger 13 and a gas-liquid separator 24;

[0065] In the embodiment of the present application, the first thermal storage indoor unit and the second thermal storage indoor unit can be three-pipe indoor units, the first thermal storage indoor unit includes a first upper heat exchanger 11 and a first lower heat exchanger 11', and the second thermal storage indoor unit includes a second upper heat exchanger 12 and a second lower heat exchanger 12'.

[0066] In this embodiment, the air conditioner is in the second defrosting mode, and the direction of the four-way valve 22-23 is adjusted to open the first passage between the compressor 1 and the outdoor heat exchanger 2, so that all the refrigerant discharged from the high-pressure chamber of the compressor 1 is output to the outdoor heat exchanger 2 through the first passage for heat release, thereby achieving defrosting of the outdoor heat exchanger 2. The refrigerant after heat release passes through the first upper heat exchanger 11, the second upper heat exchanger 12 and the common indoor heat exchanger 13 for heat absorption, and then enters the gas-liquid separator 24 and is sucked into the compressor 1, thereby achieving the circulation of the refrigerant.

[0067] In one embodiment, the air conditioner also includes a heat storage module, which can be set in the indoor part of the air conditioner. The heat storage module can be used to store and release thermal energy, thereby promoting the air conditioner to absorb or release more heat and improve the heat absorption efficiency or heat release efficiency.

[0068] like Figure 4 As shown, the method also includes:

[0069] S210: When the air conditioner is in heating mode, obtaining indoor temperature;

[0070] The indoor temperature can be detected by an indoor temperature sensor or other indoor temperature detection devices.

[0071] S210: If the indoor temperature meets the heat storage condition, control the heat storage module to store heat;

[0072] The heat storage condition is used to control the heat storage module to store heat. The heat storage condition can be specifically set according to the actual operating environment and the heat storage principle of the heat storage module.

[0073] In the embodiment of the present application, the heat storage condition may be that the indoor temperature is greater than the first target temperature. When the indoor temperature is greater than the first target temperature, it is determined that the heat storage condition is met, and the heat storage module is controlled to store heat. The first target temperature can be determined according to the temperature at which the heat storage material of the heat storage module begins to absorb heat.

[0074] The air conditioner may also be provided with an electronic expansion valve or other switching element for opening and closing the heat storage module to store heat.

[0075] When the heat storage stopping condition is reached, the heat storage module can be controlled to stop storing heat. The heat storage stopping condition can be that the heat storage amount of the heat storage module meets the target heat storage amount, or that the temperature of the heat storage module reaches a second target temperature. The second target temperature can be determined according to the phase change temperature of the heat storage material of the heat storage module.

[0076] The heat stored in the heat storage module can provide heat for other modules of the air conditioner, thereby improving the heat exchange efficiency of the air conditioner.

[0077] Controlling the air conditioner to enter the second defrost mode, comprising:

[0078] In the second defrosting mode, the refrigerant flows through the indoor heat exchanger and the heat storage module to absorb heat.

[0079] The heat storage module can be a module made of heat storage materials. The heat storage materials can include sensible heat storage materials, phase change heat storage materials, thermochemical heat storage materials and adsorption heat storage materials.

[0080] like Figure 3 As shown, the air conditioner further includes solenoid valves 14, 17, heat storage modules 16, 19 and electronic expansion valves 15, 18; the solenoid valves 14, 17 and the electronic expansion valves 15, 18 are used to control the refrigerant to flow through the heat storage modules for heat absorption.

[0081] Specifically, when the solenoid valves 14 and 17 are closed and the electronic expansion valves 15 and 18 are opened, the refrigerant flows through the first upper heat exchanger 11, the second upper heat exchanger 12 and the heat storage modules 16 and 19 to absorb heat, thereby increasing the intake temperature and the exhaust temperature and accelerating the defrosting speed and efficiency.

[0082] In an embodiment of the present application, a heat storage module is provided in the air conditioner. When the air conditioner is in a heating mode and the indoor temperature meets the heat storage conditions, the heat storage module is controlled to store heat. The heat stored in the heat storage module can provide heat for other modules of the air conditioner, thereby improving the heat exchange efficiency of the air conditioner. When the air conditioner enters the second defrost mode, the refrigerant is controlled to flow through the indoor heat exchanger and the heat storage module to absorb heat, thereby increasing the intake temperature and the exhaust temperature, and accelerating the defrosting speed and efficiency.

[0083] When the air conditioner starts heating, it takes a long time to provide heat, which causes users to wait a long time and have a poor experience.

[0084] Therefore, in response to the above problems, Figure 5 As shown, in one embodiment, the present application provides an air conditioner defrost control method, the method comprising the following steps:

[0085] S310: In response to a heating instruction, obtaining the temperature of the heat storage module;

[0086] The heating command is used to control the air conditioner to enter the heating mode, thereby increasing the indoor temperature.

[0087] S320: If the temperature of the heat storage module is greater than or equal to the target temperature threshold, control the air conditioner to enter the first heating mode; in the first heating mode, the refrigerant absorbs heat through the heat storage module and then releases heat through the indoor heat exchanger.

[0088] In the embodiment of the present application, the heat storage module may be a module made of a phase change heat storage material. The target temperature threshold may be determined according to the phase change temperature of the phase change heat storage material.

[0089] The first heating mode can be used to achieve rapid heating of the air conditioner. By utilizing the heat storage module to provide heat, the heating speed and efficiency of the air conditioner can be improved. This can effectively solve the problem of slow heating start-up speed of the air conditioner in a low temperature environment, and improve user experience and product competitiveness of the air conditioner.

[0090] When the temperature of the heat storage module is greater than or equal to the target temperature threshold, it means that the heat storage module stores a certain amount of heat. When the air conditioner is heating, the refrigerant is first allowed to absorb heat through the heat storage module, and the heat pre-stored in the heat storage module is used to provide heat for the refrigerant. When the refrigerant releases heat in the indoor heat exchanger, it can release more heat, thereby improving the heating efficiency and heating effect.

[0091] In one embodiment, the method comprises the following steps:

[0092] If the temperature of the heat storage module is lower than the target temperature threshold, the air conditioner is controlled to enter a second heating mode; in the second heating mode, the refrigerant flows through the indoor heat exchanger to release heat.

[0093] If the temperature of the heat storage module is lower than the target temperature threshold, it means that the heat stored in the heat storage module is insufficient to provide heat for other modules of the air conditioner. At this time, the air conditioner is controlled to enter the second heating mode.

[0094] The second heating mode may be a normal heating mode of the air conditioner.

[0095] In the second heating mode, the refrigerant of the air conditioner does not pass through the heat storage module, but flows directly to the indoor heat exchanger for heat release.

[0096] In the embodiment of the present application, when the temperature of the heat storage module is lower than the target temperature threshold, the air conditioner is controlled to enter the second heating mode so that the refrigerant of the air conditioner flows directly to the indoor heat exchanger for heat release.

[0097] In one embodiment, the air conditioner includes a compressor, an electronic expansion valve, a solenoid valve, a heat storage module and an indoor heat exchanger;

[0098] The heat storage module and the solenoid valve are arranged in parallel on the refrigerant transmission path between the compressor and the indoor heat exchanger, and an electronic expansion valve is arranged on the refrigerant transmission path between the heat storage module and the compressor;

[0099] Controlling the air conditioner to enter a first heating mode includes:

[0100] Controlling the solenoid valve to close, and controlling the electronic expansion valve to open;

[0101] Controlling the air conditioner to enter a second heating mode includes:

[0102] The solenoid valve is controlled to open, and the electronic expansion valve is controlled to close.

[0103] By controlling the switches of the solenoid valve and the electronic expansion valve, the refrigerant is controlled to flow through the heat storage module and then enter the indoor heat exchanger, or the refrigerant is controlled to directly enter the indoor heat exchanger.

[0104] Specifically, when the solenoid valve is closed and the electronic expansion valve is opened, the refrigerant flows through the heat storage module to absorb heat and then enters the indoor heat exchanger to release heat, thereby improving the heating efficiency; when the solenoid valve 14 is opened and the electronic expansion valve 15 is closed, the refrigerant directly enters the indoor heat exchanger to release heat.

[0105] In an embodiment of the present application, by controlling the opening and closing of the electronic expansion valve and the solenoid valve arranged on the refrigerant transmission path between the compressor and the indoor heat exchanger, the flow of refrigerant from the compressor to the indoor heat exchanger is controlled to meet the application requirements of different heating modes.

[0106] See also Figure 6 , which is a schematic diagram of the structure of an air conditioner in one embodiment; Figure 6 As shown, the air conditioner includes a compressor 1, a four-way valve 22-23, an outdoor heat exchanger 2, electronic expansion valves 3, 5-10, 15, 18, a first thermal storage indoor unit, a second thermal storage indoor unit, a common indoor heat exchanger 13, thermal storage modules 16, 19, capillaries 20-21, solenoid valves 14, 17 and a gas-liquid separator 24.

[0107] In the embodiment of the present application, the first thermal storage indoor unit and the second thermal storage indoor unit can be three-pipe indoor units, the first thermal storage indoor unit includes a first upper heat exchanger 11 and a first lower heat exchanger 11', and the second thermal storage indoor unit includes a second upper heat exchanger 12 and a second lower heat exchanger 12'.

[0108] The heat storage module 16 and the solenoid valve 14 are arranged in parallel on the refrigerant transmission path between the compressor 1 and the first upper heat exchanger 11, the heat storage module 19 and the solenoid valve 17 are arranged in parallel on the refrigerant transmission path between the compressor 1 and the second upper heat exchanger 12, an electronic expansion valve 15 is arranged on the refrigerant transmission path between the heat storage module 16 and the compressor 1, and an electronic expansion valve 18 is arranged on the refrigerant transmission path between the heat storage module 19 and the compressor 1.

[0109] By controlling the switches of the solenoid valve 14 and the electronic expansion valve 15, the refrigerant of the compressor 1 is controlled to flow through the heat storage module 16 and then enter the first upper heat exchanger 11, or the refrigerant is controlled to directly enter the first upper heat exchanger 11; by controlling the switches of the solenoid valve 17 and the electronic expansion valve 18, the refrigerant of the compressor 1 is controlled to flow through the heat storage module 19 and then enter the second upper heat exchanger 12, 12, or the refrigerant is controlled to directly enter the second upper heat exchanger 12.

[0110] The following takes the first heat storage indoor unit as an example to illustrate the operation process of the air conditioner in the first heating mode:

[0111] When the air conditioner is in the first heating mode, the solenoid valve 14 is closed and the electronic expansion valve 15 is opened. The refrigerant discharged from the high-pressure chamber of the compressor 1 is divided into two paths through the four-way valve 23. One path first passes through the heat storage module 16 for heat absorption and then flows to the first upper heat exchanger 11 for heat release (condensation). The other path flows to the first lower heat exchanger 11' for heat release (condensation). After the heat is released, the liquid refrigerant is supercooled through the plate heat exchanger. The supercooled refrigerant is throttled by the electronic expansion valve 3 and then output to the outdoor heat exchanger 2 for heat absorption (evaporation). The gaseous refrigerant after heat absorption enters the gas-liquid separator 24 through the four-way valve 22 and is sucked into the compressor 1, thereby realizing the circulation of the refrigerant.

[0112] See also Figure 6 When the air conditioner is in the second heating mode, the solenoid valve 14 is opened, the electronic expansion valve 15 is closed, and the refrigerant directly enters the heat exchanger 11 on the heat storage indoor unit to release heat.

[0113] The following takes the first heat storage indoor unit as an example to illustrate the operation process of the air conditioner in the second heating mode:

[0114] When the air conditioner is in the second heating mode, the solenoid valve 14 is opened and the electronic expansion valve 15 is closed. The refrigerant discharged from the high-pressure chamber of the compressor 1 is divided into two paths through the four-way valve 23, and flows to the first upper heat exchanger 11 and the first lower heat exchanger 11' of the first heat storage indoor unit respectively for heat release (condensation). After the heat is released, the liquid refrigerant is supercooled through the plate heat exchanger 4. The supercooled refrigerant is throttled by the electronic expansion valve 3 and output to the outdoor heat exchanger 2 for heat absorption (evaporation). The gaseous refrigerant after heat absorption enters the gas-liquid separator 24 through the four-way valve 22 and is sucked into the compressor 1, thereby realizing the circulation of the refrigerant.

[0115] like Figure 7 As shown, the embodiment of the present application also provides a defrost control device for an air conditioner, the air conditioner includes at least one indoor heat exchanger and an outdoor heat exchanger, and the device includes:

[0116] The working state information acquisition module 310 is used to acquire the working state information of the at least one indoor heat exchanger in response to a defrost instruction when the air conditioner is in a heating mode;

[0117] A first defrosting module 320, configured to control the air conditioner to enter a first defrosting mode if it is determined according to the working state information that at least one indoor heat exchanger is not in a working state;

[0118] In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger not in working state to absorb heat.

[0119] In one embodiment, the apparatus comprises:

[0120] The second defrost module is used to control the air conditioner to enter the second defrost mode if it is determined according to the working status information that all indoor heat exchangers are in working state; in the second defrost mode, the refrigerant flows through the outdoor heat exchanger to release heat, and the refrigerant after heat release flows through the indoor heat exchanger to absorb heat.

[0121] In one embodiment, the air conditioner further includes a heat storage module, and the device further includes:

[0122] An indoor temperature acquisition module, used to acquire the indoor temperature when the air conditioner is in heating mode;

[0123] A heat storage module, used to control the heat storage module to store heat if the indoor temperature meets the heat storage condition;

[0124] The second defrost module is used for, in the second defrost mode, the refrigerant flows through the indoor heat exchanger and the heat storage module to absorb heat.

[0125] In one embodiment, the air conditioner further includes a heat storage module, and the device further includes:

[0126] A heat storage temperature acquisition module, used to acquire the temperature of the heat storage module in response to a heating instruction;

[0127] The first heating module is used to control the air conditioner to enter a first heating mode if the temperature of the heat storage module is greater than or equal to a target temperature threshold; in the first heating mode, the refrigerant absorbs heat through the heat storage module and then releases heat through the indoor heat exchanger.

[0128] In one embodiment, the apparatus further comprises:

[0129] The second heating module is used to control the air conditioner to enter a second heating mode if the temperature of the heat storage module is lower than a target temperature threshold; in the second heating mode, the refrigerant flows through the indoor heat exchanger to release heat.

[0130] In one embodiment, the air conditioner includes a compressor, an electronic expansion valve, a solenoid valve, a heat storage module and an indoor heat exchanger;

[0131] The heat storage module and the solenoid valve are arranged in parallel on the refrigerant transmission path between the compressor and the indoor heat exchanger, and an electronic expansion valve is arranged on the refrigerant transmission path between the heat storage module and the compressor;

[0132] The first heating module is used to control the solenoid valve to close and the electronic expansion valve to open;

[0133] The second heating module is used to control the solenoid valve to open and control the electronic expansion valve to close.

[0134] It should be noted that the air conditioner defrost control device provided in the above embodiment only uses the division of the above functional modules as an example when executing the air conditioner defrost control method. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the air conditioner defrost control device provided in the above embodiment and the air conditioner defrost control method in the above embodiment belong to the same concept. The implementation process is detailed in the method embodiment and will not be repeated here.

[0135] An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the air conditioner defrost control method as described in any one of the above are implemented.

[0136] The embodiments of the present application may take the form of a computer program product implemented on one or more storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing program code. Computer-readable storage media include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0137] like Figure 8 As shown, the embodiment of the present application further provides an air conditioner 400, including a memory 410, a processor 420, and a computer program stored in the memory 410 and executable by the processor 420;

[0138] When the processor 420 executes the computer program, the steps of the air conditioner defrost control method as described in any one of the above are implemented.

[0139] The memory 410 includes a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0140] The processor 420 is the control core (Control Unit) of the air conditioner 400. It uses various interfaces and lines to connect the various components of the entire air conditioner 400. It runs or executes the program or module stored in the memory 410, and calls the data stored in the memory 410 to perform various functions of the air conditioner 400 and process data. For example, when the processor 420 executes the computer program stored in the memory 410, it implements all or part of the steps of the air conditioner defrost control method described in the embodiment of the present application; or implements all or part of the functions of the air conditioner defrost control device. The processor 420 can be composed of an integrated circuit, for example, it can be composed of a single packaged integrated circuit, or it can be composed of multiple integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips.

[0141] In one embodiment, the air conditioner 400 includes a compressor, an electronic expansion valve, a solenoid valve, a heat storage module and an indoor heat exchanger;

[0142] The heat storage module and the solenoid valve are arranged in parallel on the refrigerant transmission path between the compressor and the indoor heat exchanger, and an electronic expansion valve is arranged on the refrigerant transmission path between the heat storage module and the compressor.

[0143] In one embodiment, the air conditioner 400 may further include a four-way valve, a plate heat exchanger, and a gas-liquid separator.

[0144] Each port of the four-way valve can be connected to different refrigerant transmission paths of the air conditioner. The four-way valve is used to switch the conduction of different refrigerant transmission paths.

[0145] The plate heat exchanger is used to supercool the liquid refrigerant after the heat is released to obtain a supercooled refrigerant.

[0146] The gas-liquid separator is used to separate gas and liquid. The gas-liquid separator can be set at the gaseous refrigerant input port of the compressor to separate the gas and liquid of the gaseous refrigerant input into the compressor.

[0147] The air conditioner 400 may further include a capillary tube, which may be disposed on a refrigerant transmission path of the air conditioner to control the flow rate and pressure of the refrigerant on the refrigerant transmission path, thereby optimizing the performance of the air conditioner.

[0148] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0149] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A defrosting control method for an air conditioner, characterized in that: The air conditioner comprises at least one indoor heat exchanger and an outdoor heat exchanger, and the method comprises the following steps: When the air conditioner is in a heating mode, in response to a defrost instruction, obtaining working state information of the at least one indoor heat exchanger; If it is determined according to the working state information that at least one indoor heat exchanger is not in working state, controlling the air conditioner to enter a first defrosting mode; In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger not in working state to absorb heat.

2. The air conditioner defrosting control method according to claim 1, characterized in that: The following steps are also included: If it is determined according to the working status information that all indoor heat exchangers are in working state, the air conditioner is controlled to enter the second defrost mode; in the second defrost mode, the refrigerant flows through the outdoor heat exchanger to release heat, and the refrigerant after heat release flows through the indoor heat exchanger to absorb heat.

3. The air conditioner defrosting control method according to claim 2, characterized in that: The air conditioner further includes a heat storage module, and the method further includes: When the air conditioner is in heating mode, obtaining the indoor temperature; If the indoor temperature meets the heat storage condition, controlling the heat storage module to store heat; Controlling the air conditioner to enter the second defrost mode, comprising: In the second defrosting mode, the refrigerant flows through the indoor heat exchanger and the heat storage module to absorb heat.

4. The air conditioner defrosting control method according to claim 1, characterized in that: The air conditioner further includes a heat storage module, and the method includes the following steps: In response to a heating instruction, obtaining a temperature of the heat storage module; If the temperature of the heat storage module is greater than or equal to the target temperature threshold, the air conditioner is controlled to enter the first heating mode; in the first heating mode, the refrigerant absorbs heat through the heat storage module and then releases heat through the indoor heat exchanger.

5. The air conditioner defrosting control method according to claim 4, characterized in that: The method comprises the following steps: If the temperature of the heat storage module is lower than the target temperature threshold, the air conditioner is controlled to enter a second heating mode; in the second heating mode, the refrigerant flows through the indoor heat exchanger to release heat.

6. The air conditioner defrosting control method according to claim 5, characterized in that: The air conditioner comprises a compressor, an electronic expansion valve, a solenoid valve, a heat storage module and an indoor heat exchanger; The heat storage module and the solenoid valve are arranged in parallel on the refrigerant transmission path between the compressor and the indoor heat exchanger, and an electronic expansion valve is arranged on the refrigerant transmission path between the heat storage module and the compressor; Controlling the air conditioner to enter a first heating mode includes: Controlling the solenoid valve to close, and controlling the electronic expansion valve to open; Controlling the air conditioner to enter a second heating mode includes: The solenoid valve is controlled to open, and the electronic expansion valve is controlled to close.

7. An air conditioner defrost control device, characterized in that: The air conditioner comprises at least one indoor heat exchanger and an outdoor heat exchanger, and the device comprises: a working state information acquisition module, configured to acquire working state information of the at least one indoor heat exchanger in response to a defrost instruction when the air conditioner is in a heating mode; A first defrost module, configured to control the air conditioner to enter a first defrost mode if it is determined according to the working state information that at least one indoor heat exchanger is not in a working state; In the first defrost mode, the refrigerant flows through the outdoor heat exchanger and the indoor heat exchanger in working state to release heat, and the refrigerant after heat release flows through the indoor heat exchanger not in working state to absorb heat.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the air conditioner defrost control method as described in any one of claims 1 to 6 are implemented.

9. An air conditioner comprising a memory, a processor, and a computer program stored in the memory and executable by the processor; When the processor executes the computer program, the steps of the air conditioner defrost control method according to any one of claims 1 to 6 are implemented.

10. The air conditioner according to claim 9, characterized in that: The air conditioner comprises a compressor, an electronic expansion valve, a solenoid valve, a heat storage module and an indoor heat exchanger; The heat storage module and the solenoid valve are arranged in parallel on the refrigerant transmission path between the compressor and the indoor heat exchanger, and an electronic expansion valve is arranged on the refrigerant transmission path between the heat storage module and the compressor.

Images