Preheat storage reverse defrost control method, device, air conditioner and storage medium

Abstract

The embodiment of the present invention provides a pre-heat storage reverse defrost control method, device, air conditioner and storage medium, which relate to the field of air conditioning technology. The pre-heat storage reverse defrost control method includes: when the air conditioner is in the heating operation state, judging whether the air conditioner meets the defrost entry conditions. If the defrost entry conditions are met, the operating frequency of the compressor and the windshield of the indoor fan are controlled accordingly according to the temperature range of the outer ring temperature of the air conditioner to increase the internal disk temperature of the indoor unit. After continuous operation for a preset time, the air conditioner is controlled to perform reverse defrost. The control method can first perform heat storage in the indoor unit before the air conditioner enters the defrost state, that is, realize pre-heat storage, and then perform reverse defrost, and introduce the refrigerant after heat storage in the indoor unit into the outdoor unit, thereby accelerating the defrost process, shortening the defrost cycle, and thus improving the overall heating capacity of the air conditioner and the user's heating comfort experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a method and device for controlling a pre-heat storage reverse defrost, an air conditioner and a storage medium. Background Art

[0002] When an air conditioner (such as a heat pump air conditioner) is in heating operation, frost often forms on the condenser. The presence of frost increases the heat exchange resistance of the evaporator and the air flow resistance, which reduces the unit's coefficient of performance, increases energy consumption, and may even cause unit operation failures.

[0003] In the related art, a reverse defrosting technique may be used for defrosting, but the reverse defrosting technique in the related art has the problem of a long defrosting time, which results in poor heating experience for users. Summary of the Invention

[0004] The problem solved by the present invention includes the problem of long defrosting time of the reverse defrosting technology in the related art.

[0005] To solve the above problems, the present invention provides a method and device for controlling a pre-heat storage reverse defrost, an air conditioner and a storage medium.

[0006] In a first aspect, the present invention provides a pre-heat storage reverse defrost control method, which is applied to an air conditioner, and the method comprises:

[0007] When the air conditioner is in heating operation, determining whether the air conditioner meets a defrost entry condition;

[0008] If the defrost entry condition is met, the operating frequency of the compressor and the wind speed of the indoor fan are controlled accordingly according to the temperature range of the outer ring temperature of the air conditioner to increase the inner disk temperature of the indoor unit;

[0009] After the air conditioner continues to run for a preset time, the air conditioner is controlled to perform reverse defrosting.

[0010] The pre-heat storage reverse defrost control method provided by the embodiment of the present invention controls the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner when the air conditioner meets the defrost entry conditions, thereby increasing the inner disk temperature of the indoor unit and increasing the refrigerant temperature in the indoor unit. In this way, the indoor unit is first heat-stored before the air conditioner enters the defrost state, that is, pre-heat storage is realized, and then reverse defrost is performed, and the refrigerant after heat storage in the indoor unit is introduced into the outdoor unit, thereby accelerating the defrost process, shortening the defrost cycle, and thus improving the overall heating capacity of the air conditioner and the user's heating comfort experience.

[0011] Furthermore, in an optional embodiment, the step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner includes:

[0012] If the outer ring temperature is less than or equal to a first preset temperature and greater than a second preset temperature, the operating frequency of the compressor is controlled to be prohibited from decreasing, and the wind speed of the indoor fan is controlled to be lowered.

[0013] Furthermore, in an optional embodiment, the step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner includes:

[0014] If the outer ring temperature is less than or equal to the second preset temperature and greater than the third preset temperature, the operating frequency of the compressor is controlled to increase by the first preset frequency, and the wind speed of the indoor fan is controlled to decrease.

[0015] Furthermore, in an optional embodiment, the step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner further includes:

[0016] If the outer ring temperature is less than or equal to the third preset temperature, the operating frequency of the compressor is controlled to increase by a second preset frequency, and the wind speed of the indoor fan is controlled to decrease; wherein, the second preset frequency is greater than the first preset frequency.

[0017] Furthermore, in an optional embodiment, the first preset frequency is 3 to 7 Hz, and the second preset frequency is 8 to 12 Hz.

[0018] Furthermore, in an optional embodiment, the step of controlling the wind speed of the indoor fan to be lowered includes:

[0019] The wind speed of the indoor fan is controlled to be lowered by 1 level.

[0020] Furthermore, in an optional embodiment, the method further includes:

[0021] If the defrost entry condition is met and the outer ring temperature is greater than a first preset temperature, the air conditioner is controlled to continue heating operation.

[0022] In a second aspect, the present invention provides a pre-heat storage reverse defrost control device for an air conditioner, the device comprising:

[0023] a judgment module, configured to judge whether the air conditioner meets a defrost entry condition when the air conditioner is in a heating operation state;

[0024] a control module configured to control the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner to increase the inner disk temperature of the indoor unit if the defrost entry condition is met;

[0025] The control module is also used to control the air conditioner to perform reverse defrosting after running continuously for a preset time.

[0026] The technical effect of the pre-heat storage reverse defrost control device provided by the embodiment of the present invention is similar to the technical effect of the pre-heat storage reverse defrost control method mentioned above. It can first store heat in the indoor unit before the air conditioner enters the defrost mode, that is, realize pre-heat storage, and then perform reverse defrost, and introduce the refrigerant after heat storage in the indoor unit into the outdoor unit, thereby speeding up the defrost process, shortening the defrost cycle, and thus improving the overall heating capacity of the air conditioner and the user's heating comfort experience.

[0027] In a third aspect, the present invention provides an air conditioner, comprising a controller, wherein the controller is configured to execute computer instructions to implement the pre-heat storage reverse defrost control method as described in any one of the aforementioned embodiments.

[0028] The technical effect of the air conditioner provided by the embodiment of the present invention is similar to the technical effect of the above-mentioned pre-heat storage reverse defrost control method.

[0029] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a computer program, and when the computer program is executed, the pre-heat storage reverse defrost control method as described in any one of the aforementioned embodiments is implemented.

[0030] The technical effect of the computer-readable storage medium provided by the embodiment of the present invention is similar to the technical effect of the above-mentioned pre-heat storage reverse defrost control method. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic flow chart of a pre-heat storage reverse defrost control method provided by an embodiment of the present invention;

[0032] Figure 2 for Figure 1 Schematic diagram of the flow of sub-steps of step S300;

[0033] Figure 3 This is a schematic block diagram of the structure of a pre-heat storage reverse defrost control device provided by an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 200 - front heat storage reverse defrost control device; 210 - acquisition module; 220 - judgment module; 230 - control module. DETAILED DESCRIPTION

[0036] When an air conditioner (such as a heat pump air conditioner) is in heating operation, frost often forms on the condenser. The presence of frost increases the heat exchange resistance of the evaporator and the air flow resistance, which reduces the unit's coefficient of performance, increases energy consumption, and may even cause unit operation failures.

[0037] Reverse defrost technology is commonly used for defrosting air conditioners. This technology features a relatively simple system structure and control method. When the control system detects defrosting conditions, the four-way valve switches from heating to cooling mode, dissipating heat from the outdoor heat exchanger. However, this conventional reverse defrost technology suffers from long defrosting times, resulting in poor heating experience for users.

[0038] In order to improve the above technical problems, the present invention provides a pre-heat storage reverse defrost control method, device, air conditioner and storage medium. By storing heat in the indoor unit before entering the defrost, the later defrost time is shortened, and the overall heating capacity of the air conditioner and the user's heating comfort experience are greatly improved without increasing the cost.

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0040] See also Figure 1 The present invention provides a pre-heat storage reverse defrost control method for an air conditioner, such as an air source heat pump unit. This pre-heat storage reverse defrost control method stores heat in the indoor unit before defrosting, thereby shortening the defrost time and improving heating comfort for users.

[0041] The pre-heat storage reverse defrost control method may include the following steps:

[0042] Step S100: When the air conditioner is in heating operation, the outer ring temperature of the air conditioner is obtained.

[0043] In step S100 of this embodiment, after the air conditioner is turned on and the heating is running, the outer ring temperature of the air conditioner can be obtained in real time for control in subsequent steps. The outer ring temperature represents the outdoor ambient temperature of the air conditioner outdoor unit, which is detected by the outer ring temperature sensor set on the outdoor unit. In this embodiment, the outer ring temperature is T 外环温度 express.

[0044] In addition, after the air conditioner is turned on for heating, the defrost judgment parameters can be obtained in real time so that in subsequent steps, the defrost judgment parameters can be used to determine whether the defrost entry conditions are met. Since the defrost entry conditions can be set according to actual needs, for example, the outdoor unit can be judged whether it is frosted to the extent that it can be defrosted based on the outer disk temperature of the outdoor heat exchanger (the coil temperature of the outdoor heat exchanger) and the outer ring temperature. Therefore, the defrost judgment parameters can be the outer disk temperature, the outer ring temperature, etc.

[0045] Step S200: When the air conditioner is in heating operation, it is determined whether the air conditioner meets the defrost entry condition.

[0046] In this embodiment, in step S200, after the air conditioner is turned on and heating is enabled, it first runs for a preset heating time, for example, 10 minutes, to facilitate more accurate defrost determination. Subsequently, while the air conditioner is in heating mode, a determination is made as to whether the air conditioner meets the defrost entry conditions. This determination is based on defrost determination parameters, such as the outer disk temperature and the outer ring temperature. The defrost entry conditions are typically preset and are set based on different air conditioner models. For specific conditions, reference can be made to the defrost entry conditions discussed in related art and will not be further elaborated upon here.

[0047] It should be noted that if the result of step S200 is negative, that is, if the air conditioner does not meet the defrost entry conditions, the air conditioner unit does not need to be defrosted and does not enter the subsequent thermal storage defrost control. The air conditioner is controlled to operate normally for heating according to the established control logic. In this embodiment, if the defrost entry conditions are not met, the air source heat pump heating system operates normally according to the established control logic.

[0048] In step S300, if the defrost entry condition is met, the operating frequency of the compressor and the wind speed of the indoor fan are controlled accordingly according to the temperature range of the outer ring temperature of the air conditioner to increase the inner disk temperature of the indoor unit.

[0049] In step S300 of this embodiment, the indoor unit's internal coil temperature represents the coil temperature of the indoor heat exchanger. If the defrost judgment parameters meet the set defrost entry conditions, the subsequent indoor unit heat storage defrost control can be entered, thereby further determining the temperature range of the external coil temperature. The compressor's operating frequency and the indoor fan's wind speed are controlled accordingly based on the temperature range of the external coil temperature. By adjusting the compressor's operating frequency and the indoor fan's wind speed, the internal coil temperature can be effectively increased, thereby raising the refrigerant temperature in the indoor unit and achieving heat storage in the indoor unit. Furthermore, the increased internal coil temperature increases the indoor air outlet temperature, ensuring user comfort for indoor heating.

[0050] Step S400: After the air conditioner continues to run for a preset time, the air conditioner is controlled to perform reverse defrosting.

[0051] In step S400 of this embodiment, after controlling the compressor operating frequency and the indoor fan speed accordingly based on the temperature range of the outer ring temperature, the adjusted compressor operating frequency and indoor fan speed are maintained, and the air conditioner is controlled to continue operating for a preset time, where the preset time is set based on the temperature range of the outer ring temperature and actual demand. After the air conditioner continues heating for the preset time, the air conditioner is controlled to perform reverse defrosting. It should be noted that when performing reverse defrosting, the four-way valve is reversed, and the air conditioner switches from heating mode to defrost mode.

[0052] Therefore, the pre-heat storage reverse defrost control method provided in the embodiment of the present invention controls the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner when the air conditioner meets the defrost entry conditions, thereby increasing the inner disk temperature of the indoor unit and increasing the refrigerant temperature in the indoor unit. In this way, the indoor unit stores heat before the air conditioner enters the defrost mode, that is, pre-heat storage is realized, and then reverse defrost is performed, and the refrigerant after heat storage in the indoor unit is introduced into the outdoor unit, thereby speeding up the defrost process, shortening the defrost cycle, and thus improving the overall heating capacity of the air conditioner and the user's heating comfort experience.

[0053] See also Figure 2 In order to more accurately control the heat storage and defrosting control of the indoor unit of the air conditioner when the outer ring temperature is in different temperature ranges, thereby ensuring the heat storage effect of the indoor unit and indoor comfort, and preparing for the subsequent shortening of the defrosting time, in this embodiment, step S300 may include the following sub-steps S310 to S330.

[0054] Sub-step S310: If the outer ring temperature is less than or equal to the first preset temperature and greater than the second preset temperature, the operating frequency of the compressor is controlled to be prohibited from decreasing, and the wind speed of the indoor fan is controlled to be lowered.

[0055] In the sub-step S310 of this embodiment, the first preset temperature and the second preset temperature are both preset values, which can be set accordingly according to actual needs. For example, the first preset temperature can be 8°C and the second preset temperature can be 0°C. The outer ring temperature is less than or equal to the first preset temperature and greater than the second preset temperature. For example, 0°C < T 外环温度 ≤8℃, the outer ring temperature is within this temperature range, it can be considered that the outdoor ambient temperature is high, and the degree of frost is not too serious at this time. In order to ensure heating comfort and save energy, the operating frequency of the compressor can be controlled to prohibit reduction, and the wind speed of the indoor fan can be controlled to be lowered.

[0056] Among them, it should be noted that the operating frequency of the compressor is prohibited from being reduced, that is, the operating frequency is controlled to be "prohibited from decreasing". At this time, the operating frequency is not allowed to be reduced, and it can be considered to maintain the current operating frequency or increase the operating frequency. By controlling the operating frequency of the compressor to be prohibited from being reduced, the air outlet temperature of the indoor unit can be guaranteed, and the heating comfort can be guaranteed. At this time, the operating frequency is not forced to be controlled to increase, which saves energy consumption. Controlling the indoor fan to lower the wind speed can reduce the heat supply to the indoor room and increase the temperature of the internal disk. Therefore, the prohibition of reducing the operating frequency of the compressor and the reduction of the wind speed of the indoor fan are combined to increase the temperature of the internal disk and realize effective heat storage of the indoor unit. On the premise of ensuring indoor heating comfort, it prepares for the subsequent shortening of the defrost time.

[0057] In sub-step S310 of this embodiment, the indoor fan speed is optionally lowered by one gear, ensuring indoor heating comfort while achieving heat storage. Of course, in other embodiments, the indoor fan speed reduction level can also be set accordingly based on actual needs, such as by two gears, based on comprehensive considerations of indoor comfort. Furthermore, after the compressor operating frequency is prohibited from being reduced and the indoor fan speed is lowered, if the compressor operating frequency and the indoor fan speed meet the aforementioned control conditions, the air conditioner is controlled to continue operating for a preset time, such as 30 seconds, before entering defrost mode.

[0058] In sub-step S320, if the outer ring temperature is less than or equal to the second preset temperature and greater than the third preset temperature, the operating frequency of the compressor is controlled to increase by the first preset frequency, and the wind speed of the indoor fan is controlled to decrease.

[0059] In this embodiment, in sub-step S320, the second preset temperature and the third preset temperature are both preset values, which are set accordingly according to actual needs. For example, the second preset temperature can be 0°C and the third preset temperature can be -5°C. The outer ring temperature is less than or equal to the second preset temperature and greater than the third preset temperature. For example, -5°C < T 外环温度 ≤0℃, the outer ring temperature is in this temperature range, it can be considered that the outdoor ambient temperature is low, and the degree of frost is serious at this time. In order to ensure heating comfort and save energy, the operating frequency of the compressor can be controlled to increase the first preset frequency, and the wind speed of the indoor fan can be controlled to decrease.

[0060] It should be noted that the first preset frequency is a preset frequency, which is set according to actual needs. For example, the first preset frequency can be 3 to 7 Hz. As an example, the first preset frequency can be 5 Hz. In this embodiment, if -5°C < T 外环温度If the temperature is ≤0°C, the compressor operating frequency is increased by 5Hz, meaning the compressor operating frequency is increased by 5Hz from the current operating frequency. Due to the severe frost formation at this time, increasing the compressor operating frequency appropriately can effectively raise the internal disk temperature and increase the indoor unit's heat storage capacity. Controlling the compressor accordingly based on the frost situation also saves energy. Furthermore, lowering the indoor fan's damper setting reduces heat delivery to the room, similarly increasing the internal disk temperature. Therefore, combining increasing the compressor operating frequency by a first preset frequency with lowering the indoor fan's damper setting increases the internal disk temperature and the indoor unit's heat storage capacity, effectively shortening the defrost time while ensuring indoor heating comfort. Furthermore, due to the low outdoor ambient temperature, combining increasing the frequency and lowering the damper setting effectively mitigates the issue of increased noise compared to simply increasing the operating frequency to store heat.

[0061] In sub-step S320 of this embodiment, the indoor fan speed is optionally lowered by one gear, thereby ensuring indoor heating comfort while ensuring an increase in heat storage. Of course, in other embodiments, the indoor fan speed can also be set accordingly based on actual needs, such as by two gears, based on comprehensive considerations of indoor comfort. Furthermore, after the compressor operating frequency is controlled to increase by a first preset frequency and the indoor fan speed is controlled to decrease, if the compressor operating frequency and the indoor fan speed meet the aforementioned control conditions, the air conditioner is controlled to continue operating for a preset time, such as 30 seconds, before entering defrost mode.

[0062] Sub-step S330, if the outer ring temperature is less than or equal to the third preset temperature, control the operating frequency of the compressor to increase to a second preset frequency, and control the wind speed of the indoor fan to decrease; wherein the second preset frequency is greater than the first preset frequency.

[0063] In sub-step S330 of this embodiment, similar to the above sub-step S320, the third preset temperature is a preset value, which is set according to actual needs. For example, the third preset temperature can be -5°C. The outer ring temperature is less than or equal to the third preset temperature. For example, T 外环温度 <-5℃, the outer ring temperature is in this temperature range, it can be considered that the outdoor ambient temperature is very low, and the degree of frost is very serious at this time. In order to ensure heating comfort, the operating frequency of the compressor can be controlled to increase to the second preset frequency, and the wind speed of the indoor fan can be controlled to decrease.

[0064] It should be noted that the second preset frequency is a preset frequency, which is set according to actual needs. For example, the second preset frequency can be 8 to 12 Hz. As an example, the first preset frequency can be 10 Hz. In this embodiment, if T 外环温度If the temperature is less than -5°C, the operating frequency of the compressor is controlled to increase by 10Hz, that is, the operating frequency of the compressor is controlled to increase by 10Hz from the current operating frequency. Since the degree of frost is very serious at this time, by controlling the operating frequency of the compressor to increase by a second preset frequency, the internal disk temperature can be significantly increased, and the heat storage capacity of the indoor unit can be significantly increased. In addition, controlling the indoor fan's wind speed to lower can reduce the heat supply to the indoor room, which can also increase the internal disk temperature. Therefore, the combination of increasing the operating frequency of the compressor by a second preset frequency and lowering the wind speed of the indoor fan increases the internal disk temperature and the heat storage capacity of the indoor unit, while ensuring indoor heating comfort, paving the way for the subsequent effective shortening of the defrost time. In addition, due to the low outdoor ambient temperature, the combined control of increasing the frequency and lowering the wind speed can effectively improve the problem of increased noise compared to simply increasing the operating frequency to store heat.

[0065] In sub-step S330 of this embodiment, the indoor fan speed is optionally lowered by one level, thereby significantly increasing the amount of heat stored while also ensuring indoor heating comfort. Furthermore, after the compressor operating frequency is increased by a second preset frequency and the indoor fan speed is lowered, if the compressor operating frequency and the indoor fan speed meet the aforementioned control conditions, the air conditioner is controlled to continue operating for a preset time, for example, 30 seconds, before entering defrost mode.

[0066] It should be noted that in sub-steps S310, S320, and S330 of this embodiment, the indoor fan speed is lowered by one gear. Of course, in other embodiments, other gears may be lowered, and the setting can be adjusted accordingly according to actual needs. In addition, in sub-steps S310, S320, and S330 of this embodiment, after the compressor operating frequency and the indoor fan speed are adjusted, the air conditioner continues to operate for 30 seconds, that is, the preset duration is set to the same, for example, 30 seconds. Of course, in other embodiments, the preset duration may also be different, and the setting can be adjusted accordingly according to actual needs.

[0067] Please continue reading Figure 1 In this embodiment, the pre-heat storage reverse defrost control method further includes step S500 after step S200.

[0068] In step S500, if the defrost entry condition is met and the outer ring temperature is greater than the first preset temperature, the air conditioner is controlled to continue heating operation.

[0069] In step S500 of this embodiment, the first preset temperature is a preset value, which is set according to actual needs. For example, the first preset temperature can be 8°C. When the defrosting conditions are met, the outer ring temperature range is further determined. If the outer ring temperature is greater than the first preset temperature, as an example, T 外环温度>8℃, it can be considered that frost will generally not form at this time, or even if frost forms, there is no need to store heat. At this time, the air conditioner can be controlled to continue normal heating operation according to the established control logic, for example, the air source heat pump can be controlled to operate normally according to the established control logic.

[0070] In addition, it should be noted that during the heating operation of the air conditioner, the defrost entry conditions and the outer ring temperature conditions are judged in real time, and the above steps are controlled accordingly until the heating mode is exited and the air conditioner is shut down.

[0071] See also Figure 3 To implement the possible steps of the pre-heat storage reverse defrost control method provided in the above-mentioned embodiments, an embodiment of the present invention provides a pre-heat storage reverse defrost control device 200, which is applied to an air conditioner and is used to implement the above-mentioned pre-heat storage reverse defrost control method. It should be noted that the basic principles and technical effects of the pre-heat storage reverse defrost control device 200 provided in the embodiment of the present invention are basically the same as those of the above-mentioned embodiments. For the sake of simplicity, any parts not mentioned in this embodiment can be referred to the corresponding content of the above-mentioned embodiments.

[0072] The pre-heat storage reverse defrost control device 200 provided in the embodiment of the present invention includes an acquisition module 210 , a judgment module 220 and a control module 230 .

[0073] The acquisition module 210 is used to acquire the outer ring temperature of the air conditioner when the air conditioner is in heating operation.

[0074] In this embodiment, the acquisition module 210 is used to execute step S100 in the above method to achieve corresponding technical effects.

[0075] The judgment module 220 is used to judge whether the air conditioner meets the defrost entry condition when the air conditioner is in the heating operation state.

[0076] In this embodiment, the determination module 220 is used to execute step S200 in the above method to achieve corresponding technical effects.

[0077] The control module 230 is used to control the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the air conditioner's outer ring temperature if the defrost entry condition is met, so as to increase the inner disk temperature of the indoor unit.

[0078] In this embodiment, the control module 230 is used to execute step S300 and each sub-step in the above method to achieve corresponding technical effects.

[0079] The control module 230 is further configured to control the air conditioner to perform reverse defrosting after the air conditioner continues to run for a preset time.

[0080] In this embodiment, the control module 230 is used to execute step S400 in the above method to achieve corresponding technical effects.

[0081] The control module 230 is further configured to control the air conditioner to continue heating operation if the defrost entry condition is met and the outer ring temperature is greater than a first preset temperature.

[0082] In this embodiment, the control module 230 is used to execute step S500 in the above method to achieve corresponding technical effects.

[0083] In addition, an embodiment of the present invention further provides an air conditioner, including a controller, which is used to execute computer instructions to implement the pre-heat storage reverse defrost control method provided by the embodiment of the present invention.

[0084] The controller can be an integrated circuit chip with signal processing capabilities. The controller can be a general-purpose processor, including a central processing unit (CPU), a single-chip microcomputer, a microcontroller unit (MCU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), an embedded ARM, and other chips. The controller can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention.

[0085] In a feasible embodiment, the air conditioner may further include a memory for storing program instructions that can be executed by the controller. For example, the pre-heat storage reverse defrost control device 200 provided in the embodiment of the present application includes at least one that can be stored in the memory in the form of software or firmware. The memory can be an independent external memory, including but not limited to random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), and electrically erasable read-only memory (EEPROM). The memory can also be integrated with the controller, for example, the memory can be integrated with the controller in the same chip.

[0086] In addition, an embodiment of the present invention further provides a computer-readable storage medium, which includes a computer program. When the computer program is executed, the pre-heat storage reverse defrost control method provided in any of the above embodiments is implemented.

[0087] In summary, the pre-heat storage reverse defrost control method, device, air conditioner and storage medium provided by the embodiment of the present invention, when the air conditioner meets the defrost entry conditions, controls the operating frequency of the compressor and the windshield of the indoor fan according to the temperature range of the air conditioner's outer ring temperature, increases the internal disk temperature of the indoor unit, and increases the refrigerant temperature in the indoor unit. In this way, the indoor unit first stores heat before the air conditioner enters the defrost state, that is, pre-heat storage is achieved, and then reverse defrost is performed, and the refrigerant after heat storage in the indoor unit is introduced into the outdoor unit, thereby accelerating the defrost process, shortening the defrost cycle, and thus improving the overall heating capacity of the air conditioner and the user's heating comfort experience. In addition, the product added value and heating comfort experience are greatly improved without increasing the cost, and it is energy-saving, environmentally friendly and highly reliable.

[0088] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a portion of code, and the module, program segment or a portion of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0089] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0090] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0091] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A pre-heat storage reverse defrost control method, applied to air conditioners, characterized in that: The method comprises: When the air conditioner is in heating operation, determining whether the air conditioner meets a defrost entry condition; If the defrost entry condition is met, the operating frequency of the compressor and the wind speed of the indoor fan are controlled accordingly according to the temperature range of the outer ring temperature of the air conditioner to increase the inner disk temperature of the indoor unit; After the air conditioner continues to run for a preset time, controlling the air conditioner to perform reverse defrosting; The step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner comprises: If the outer ring temperature is less than or equal to the second preset temperature and greater than the third preset temperature, the operating frequency of the compressor is controlled to increase by the first preset frequency, and the wind speed of the indoor fan is controlled to decrease; The step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner further includes: If the outer ring temperature is less than or equal to the third preset temperature, the operating frequency of the compressor is controlled to increase by a second preset frequency, and the wind speed of the indoor fan is controlled to decrease; wherein, the second preset frequency is greater than the first preset frequency.

2. The pre-heat storage reverse defrost control method according to claim 1, characterized in that: The step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner comprises: If the outer ring temperature is less than or equal to a first preset temperature and greater than a second preset temperature, the operating frequency of the compressor is controlled to be prohibited from decreasing, and the wind speed of the indoor fan is controlled to be lowered.

3. The pre-heat storage reverse defrost control method according to claim 1, characterized in that: The first preset frequency is 3-7 Hz, and the second preset frequency is 8-12 Hz.

4. The pre-heat storage reverse defrost control method according to any one of claims 1 to 3, characterized in that: The step of controlling the wind speed of the indoor fan to be lowered comprises: The wind speed of the indoor fan is controlled to be lowered by 1 level.

5. The pre-heat storage reverse defrost control method according to claim 1, characterized in that: The method further comprises: If the defrost entry condition is met and the outer ring temperature is greater than a first preset temperature, the air conditioner is controlled to continue heating operation.

6. A pre-heat storage reverse defrost control device, applied to air conditioners, characterized in that: The device comprises: a judgment module, configured to judge whether the air conditioner meets a defrost entry condition when the air conditioner is in a heating operation state; a control module configured to control the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner to increase the inner disk temperature of the indoor unit if the defrost entry condition is met; The step of controlling the operating frequency of the compressor and the wind speed of the indoor fan according to the temperature range of the outer ring temperature of the air conditioner comprises: If the outer ring temperature is less than or equal to the second preset temperature and greater than the third preset temperature, the operating frequency of the compressor is controlled to increase by the first preset frequency, and the wind speed of the indoor fan is controlled to decrease; If the outer ring temperature is less than or equal to the third preset temperature, the operating frequency of the compressor is controlled to increase by a second preset frequency, and the wind speed of the indoor fan is controlled to decrease; Wherein, the second preset frequency is greater than the first preset frequency; The control module is also used to control the air conditioner to perform reverse defrosting after running continuously for a preset time.

7. An air conditioner, characterized in that: The invention comprises a controller for executing computer instructions to implement the pre-heat storage reverse defrost control method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a computer program, and when the computer program is executed, the pre-heat storage reverse defrost control method according to any one of claims 1 to 5 is implemented.

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