Variable shunt heat flow defrosting control method and device and air conditioner

Abstract

The invention provides a variable shunt heat flow defrosting control method and device and an air conditioner, and is applied to the field of air conditioner control. The method comprises the steps that firstly, under the condition that a defrosting instruction is received, the outdoor environment temperature is obtained; then, the flow dividing mode is determined according to the outdoor environment temperature, the electronic expansion valve is controlled to be opened to the maximum opening degree, and the flow divider is controlled to conduct refrigerant flow dividing according to the determined flow dividing mode; the electronic expansion valve is a throttling unit arranged between an indoor unit and an outdoor unit of the air conditioner. The flow dividing modes of the flow divider comprise single-path flow dividing and double-path flow dividing; one end of the shunt is connected with the electronic expansion valve, and the other end of the shunt is connected with a heat exchanger on the outdoor unit. According to the variable shunt heat flow defrosting control method and device and the air conditioner, when the air conditioner is defrosted, the heating effect of the indoor unit can still be kept, and the influence on the indoor environment temperature when the air conditioner is defrosted is reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioner control, and in particular to a variable split heat flow defrosting control method, device and air conditioner. Background Art

[0002] As people's living standards continue to improve and the level of intelligence of home appliances continues to increase, smart home appliances are becoming more and more popular. Users can use air conditioners for heating in winter to increase the indoor temperature, and can also use air conditioners for cooling in summer to reduce the indoor temperature.

[0003] When users use air conditioners for heating in winter, the outdoor unit of the air conditioner acts as an evaporator, absorbing heat from the outdoor air. This causes the evaporator temperature to drop below 0°C, and the moisture in the air condenses into frost on the surface of the evaporator. Moreover, when the outdoor humidity is high, the frost formation is more serious. In the related art, the refrigerant counterflow method is usually used for defrosting.

[0004] However, such a defrosting method will cause the indoor unit to stop heating during the defrosting period, and even cause the indoor temperature to drop to a certain extent, which greatly affects the user experience. Summary of the invention

[0005] The purpose of the present application is to provide a variable split heat flow defrost control method, device and air conditioner, which can maintain the heating effect of the indoor unit when the air conditioner is defrosted, and reduce the impact of the air conditioner defrosting on the indoor ambient temperature.

[0006] The present application provides a variable split heat flow defrosting control method, comprising: When a defrost command is received, the outdoor ambient temperature is obtained; the diversion mode is determined according to the outdoor ambient temperature, and the electronic expansion valve is controlled to open to the maximum opening and the diverter is controlled to divert the refrigerant according to the determined diversion mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion modes of the diverter include: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

[0007] Optionally, the diversion mode is determined according to the outdoor ambient temperature, and the electronic expansion valve is controlled to open to the maximum opening and to divert according to the determined diversion mode, including: when the outdoor ambient temperature is greater than a preset temperature threshold, the diversion mode is determined to be two-way diversion, and the diverter is controlled to divert the refrigerant according to the two-way diversion mode.

[0008] Optionally, the diversion mode is determined according to the outdoor ambient temperature, and the electronic expansion valve is controlled to open to the maximum opening and to divert according to the determined diversion mode, including: when the outdoor ambient temperature is less than or equal to a preset temperature threshold, the diversion mode is determined to be single-way diversion, and the diverter is controlled to divert the refrigerant according to the single-way diversion mode.

[0009] Optionally, after receiving the defrost instruction sent by the outdoor unit, the method further includes: controlling the fan speed of the indoor unit so that the coil temperature of the indoor unit is maintained within a preset temperature range.

[0010] Optionally, when a defrost command is received and before the outdoor ambient temperature is obtained, the method further includes: after the air conditioner is powered on and runs in a heating mode for a first preset period of time, obtaining a first signal to be processed from the outdoor unit, and filtering the first signal to be processed to obtain an initial quality of the air conditioner; the signal to be processed includes: a piezoelectric signal of the outdoor unit collected at multiple time points; the piezoelectric signal is used to characterize the quality of the outdoor unit; obtaining a second signal to be processed from the outdoor unit in real time, filtering the second signal to be processed to obtain a current quality of the air conditioner, and triggering the defrost command when the difference between the current quality and the initial quality is greater than a preset quality difference.

[0011] The present application also provides a variable split heat flow defrost control device, comprising: An acquisition module is used to acquire the outdoor ambient temperature when a defrost command is received; a determination module is used to determine the diversion mode according to the outdoor ambient temperature; a control module is used to control the electronic expansion valve to open to the maximum opening, and control the diverter to divert the refrigerant according to the determined diversion mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion modes of the diverter include: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

[0012] Optionally, the determination module is specifically used to determine that the diversion method is two-way diversion when the outdoor ambient temperature is greater than a preset temperature threshold; the control module is specifically used to control the diverter to divert the refrigerant according to the two-way diversion method.

[0013] Optionally, the determination module is specifically used to determine that the diversion method is single-way diversion when the outdoor ambient temperature is less than or equal to a preset temperature threshold; the control module is specifically used to control the diverter to divert the refrigerant according to the single-way diversion method.

[0014] Optionally, the control module is further used to control the fan speed of the indoor unit so that the coil temperature of the indoor unit is maintained within a preset temperature range.

[0015] Optionally, the device also includes: a calculation module; the acquisition module is also used to acquire a first signal to be processed of the outdoor unit after the air conditioner is powered on and runs in the heating mode for a first preset period of time; the calculation module is used to filter the first signal to be processed to obtain the initial quality of the air conditioner; the signal to be processed includes: a piezoelectric signal of the outdoor unit collected at multiple time points; the piezoelectric signal is used to characterize the quality of the outdoor unit; the acquisition module is also used to acquire a second signal to be processed of the outdoor unit in real time; the calculation module is also used to filter the second signal to be processed to obtain the current quality of the air conditioner, and trigger the defrost command when the difference between the current quality and the initial quality is greater than the preset quality difference.

[0016] The present application also provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of any of the variable split heat flow defrost control methods described above.

[0017] The present application also provides an electronic device, which may be an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any of the variable split heat flow defrost control methods described above are implemented.

[0018] The present application also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of any of the variable split heat flow defrosting control methods described above are implemented.

[0019] The variable shunt heat flow defrosting control method, device and air conditioner provided by the present application first obtain the outdoor ambient temperature when receiving the defrost command; then determine the shunt mode according to the outdoor ambient temperature, control the electronic expansion valve to open to the maximum opening, and control the shunt to shunt the refrigerant according to the determined shunt mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the shunt mode of the shunt includes: single-way shunt and double-way shunt; one end of the shunt is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the operating principle of the air conditioner provided by this application; Figure 2 It is a flow chart of the variable split heat flow defrosting control method provided by the present application; Figure 3 It is a structural schematic diagram of the electronic expansion valve and the diverter provided by the present application; Figure 4 It is a structural schematic diagram of an outdoor heat exchanger provided by the present application; Figure 5 It is a structural schematic diagram of a variable split heat flow defrost control device provided by the present application; Figure 6 It is a structural schematic diagram of the electronic device provided by this application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] The operating principle of the air conditioner involved in the embodiment of the present application is described in detail below: like Figure 1As shown in the figure, the compressor compresses the refrigerant (coolant) and transports it to the condenser through a pipeline. The high-temperature and high-pressure gaseous refrigerant releases heat in the condenser and becomes a medium-temperature and high-pressure liquid refrigerant. After that, the medium-temperature and high-pressure liquid refrigerant is depressurized by a capillary tube (throttling unit) and becomes a low-temperature and low-pressure liquid refrigerant. The low-temperature and low-pressure liquid refrigerant is transported to the evaporator to evaporate from liquid to gas, and absorbs a large amount of heat during the evaporation process. Finally, the low-temperature and low-pressure gaseous refrigerant in the evaporator is transported to the compressor to participate in the next cycle. When the air conditioner is cooling, the heat exchanger of the outdoor unit is the condenser, and the heat exchanger of the indoor unit is the evaporator; conversely, when the air conditioner is heating, the heat exchanger of the outdoor unit is the evaporator, and the heat exchanger of the indoor unit is the condenser.

[0025] In the related art, defrosting of the air conditioner requires switching of the four-way valve, which will cause the room to not be heated for a period of time and may even cause the indoor ambient temperature to drop to a certain extent, affecting the user experience.

[0026] In response to the above-mentioned technical problems existing in the related technology, an embodiment of the present application provides a heat flow defrosting method, which opens the throttling device to the maximum so that it does not produce a throttling effect, so that it can not only heat the indoor environment but also perform a defrosting process, and switches the diversion mode according to the outdoor ambient temperature to make it defrost faster.

[0027] The variable split heat flow defrost control method provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0028] like Figure 2 As shown, an embodiment of the present application provides a variable split heat flow defrosting control method, which may include the following steps 201 and 202: Step 201: upon receiving a defrost command, obtaining the outdoor ambient temperature; For example, after receiving the defrost command, the control unit of the air conditioner opens the throttling device to the maximum to prevent throttling, so that it can heat the room and perform a defrosting process, and switches the diversion mode according to the outdoor ambient temperature to make it defrost faster.

[0029] Step 202: determine the diversion mode according to the outdoor ambient temperature, control the electronic expansion valve to open to the maximum opening, and control the diverter to divert the refrigerant according to the determined diversion mode.

[0030] Among them, the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion mode of the diverter includes: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

[0031] For example, the air conditioner is equipped with Figure 3 The electronic expansion valve shown can open the valve to the maximum so that it does not throttle. In this way, the refrigerant with a higher temperature in the indoor unit can flow to the outdoor heat exchanger and use its heat for defrosting.

[0032] Exemplarily, in an embodiment of the present application, the diversion methods may include: single-way diversion and dual-way diversion. When the outdoor ambient temperature is high, if single-way diversion is used, the pressure loss of the refrigerant flow path will be too large, which is not conducive to heat dissipation and energy saving. At this time, dual-way diversion can be used; when the outdoor ambient temperature is low, using a single way can dissipate heat well and speed up the defrosting process.

[0033] Specifically, in the case of dual-path traffic diversion, the above step 202 may further include the following step 202a: Step 202a: when the outdoor ambient temperature is greater than a preset temperature threshold, determine that the diversion method is two-way diversion, and control the diverter to divert the refrigerant according to the two-way diversion method.

[0034] Specifically, in the case of single-path traffic diversion, the above step 202 may further include the following step 202b: Step 202b: when the outdoor ambient temperature is less than or equal to a preset temperature threshold, determine that the diversion mode is single-way diversion, and control the diverter to divert the refrigerant according to the single-way diversion mode.

[0035] It should be noted that when a defrost signal is received, the diversion mode can be switched according to the outdoor ambient temperature to determine whether to use single-way diversion or dual-way diversion. In this way, the mode can be changed without shutting down, thereby achieving a quick defrost effect.

[0036] For example, Figure 3 As shown in the figure, a flow divider connected to an electronic expansion valve can be an integrated structure with the electronic expansion valve or a split structure. After the opening of the electronic expansion valve is adjusted to the maximum, the flow divider mode can be further determined according to the outdoor ambient temperature. When the temperature is low, a single-way flow divider is used to improve the defrosting efficiency; when the temperature is high, a double-way flow divider is used to improve the heat dissipation efficiency and energy saving.

[0037] It should be noted that based on Figure 3 The shunt shown, such as Figure 4 As shown, the two diverter pipes (including pipe A and pipe B) of the diverter can be respectively connected to two pipes on the outdoor heat exchanger so as to control the flow of the refrigerant during diversion.

[0038] Optionally, in an embodiment of the present application, when performing a defrost operation by controlling the opening of the electronic expansion valve, the fan speed of the indoor unit can also be controlled to avoid excessive heat loss of the refrigerant in the indoor heat exchanger, thereby affecting the defrost effect.

[0039] Exemplarily, after the above step 201, the variable split heat flow defrosting control method provided in the embodiment of the present application may further include the following step 203: Step 203: Control the fan speed of the indoor unit so that the coil temperature of the indoor unit is maintained within a preset temperature range.

[0040] For example, when defrosting, the speed of the indoor unit fan can be set to automatic so that the speed can be adjusted according to the temperature of the indoor unit coil to ensure that the indoor unit is always in a heating state.

[0041] It should be noted that in the embodiment of the present application, the coil temperature of the indoor unit can be controlled between 65°C and 70°C by adjusting the fan speed of the indoor unit to ensure that the indoor ambient temperature is not greatly affected.

[0042] Optionally, in the embodiment of the present application, a piezoelectric sensor may be provided below the heat exchanger of the outdoor unit, and a signal from the piezoelectric sensor may be collected to determine whether defrosting is required.

[0043] For example, before the above step 201, the variable split heat flow defrosting control method provided in the embodiment of the present application may further include the following steps 204 and 205: Step 204: After the air conditioner is powered on and runs in a heating mode for a first preset time, a first signal to be processed of an outdoor unit is obtained, and the initial quality of the air conditioner is obtained after filtering the first signal to be processed.

[0044] The signal to be processed includes: piezoelectric signals of the outdoor unit collected at multiple time points; the piezoelectric signals are used to characterize the quality of the outdoor unit.

[0045] Step 205, acquiring a second signal to be processed of the outdoor unit in real time, filtering the second signal to be processed to obtain the current quality of the air conditioner, and triggering the defrost instruction when the difference between the current quality and the initial quality is greater than a preset quality difference.

[0046] For example, based on the collected signal from the piezoelectric sensor, it can be determined whether frost has formed on the outdoor unit and whether a defrosting operation is required.

[0047] Exemplarily, in the embodiment of the present application, the following filtering algorithm may be used to filter the first signal to be processed and the second signal to be processed, specifically including: 1. Perform interval sampling on the signal to be processed according to the target sampling interval to obtain multiple original sampling points, and determine the signal value of each original sampling point.

[0048] 2. Divide the signal values ​​of a preset number of adjacent original sampling points into a sampling group to obtain multiple sampling groups, and calculate the weighted average value of each sampling group in turn based on a preset weight coefficient to obtain the filtered signal value corresponding to each sampling group.

[0049] 3. Perform fitting calculation on the filtered signal value corresponding to each sampling group to obtain a processed signal, and obtain the corresponding quality based on the signal.

[0050] For example, the signal to be processed is first sampled, and then the signal values ​​of every three adjacent sampling points (i.e., the preset number of original sampling points) are grouped together, and a weighted average is calculated based on the weight coefficient corresponding to each sampling point (for example, the weight coefficient is 1 / 3, and the weight coefficient can be adjusted according to demand during the actual calculation process, and the sum of the weight coefficients corresponding to all sampling points is 1). Afterwards, the weighted average is used as the signal value after filtering of the above three adjacent sampling points. The signal value corresponding to each sampling group is calculated in turn according to the above method, and then the filtered signal value corresponding to each sampling group is fitted and calculated to obtain the filtered signal.

[0051] In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0052] The variable shunt heat flow defrosting control method provided by the embodiment of the present application first obtains the outdoor ambient temperature when receiving the defrost command; then determines the shunt mode according to the outdoor ambient temperature, controls the electronic expansion valve to open to the maximum opening, and controls the shunt device to shunt the refrigerant according to the determined shunt mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the shunt mode of the shunt device includes: single-way shunt and double-way shunt; one end of the shunt device is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0053] It should be noted that the variable shunt heat flow defrost control method provided in the embodiment of the present application can be executed by a variable shunt heat flow defrost control device, or a control module in the variable shunt heat flow defrost control device for executing the variable shunt heat flow defrost control method. In the embodiment of the present application, the variable shunt heat flow defrost control device executing the variable shunt heat flow defrost control method is taken as an example to illustrate the variable shunt heat flow defrost control device provided in the embodiment of the present application.

[0054] It should be noted that, in the embodiments of the present application, the variable split heat flow defrost control method shown in the above-mentioned method drawings is illustrated by taking one of the drawings in the embodiments of the present application as an example. In specific implementation, the variable split heat flow defrost control method shown in the above-mentioned method drawings can also be implemented in combination with any other drawings that can be combined as shown in the above-mentioned embodiments, which will not be repeated here.

[0055] The variable split heat flow defrost control device provided in the present application is described below, and the variable split heat flow defrost control method described below and described above can refer to each other.

[0056] Figure 5 A schematic diagram of the structure of a variable split heat flow defrosting control device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, specifically including: The acquisition module 501 is used to obtain the outdoor ambient temperature when receiving a defrost command; the determination module 502 is used to determine the diversion mode according to the outdoor ambient temperature; the control module 503 is used to control the electronic expansion valve to open to the maximum opening, and control the diverter to divert the refrigerant according to the determined diversion mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion modes of the diverter include: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

[0057] Optionally, the determination module 502 is specifically used to determine that the diversion method is two-way diversion when the outdoor ambient temperature is greater than a preset temperature threshold; the control module 503 is specifically used to control the diverter to divert the refrigerant according to the two-way diversion method.

[0058] Optionally, the determination module 502 is specifically used to determine that the diversion method is single-way diversion when the outdoor ambient temperature is less than or equal to a preset temperature threshold; the control module 503 is specifically used to control the diverter to divert the refrigerant according to the single-way diversion method.

[0059] Optionally, the control module 503 is further configured to control the fan speed of the indoor unit so as to keep the coil temperature of the indoor unit within a preset temperature range.

[0060] Optionally, the device also includes: a calculation module; the acquisition module 501 is also used to obtain a first signal to be processed from the outdoor unit after the air conditioner is powered on and runs in the heating mode for a first preset period of time; the calculation module is used to filter the first signal to be processed to obtain the initial quality of the air conditioner; the signal to be processed includes: a piezoelectric signal of the outdoor unit collected at multiple time points; the piezoelectric signal is used to characterize the quality of the outdoor unit; the acquisition module 501 is also used to obtain a second signal to be processed from the outdoor unit in real time; the calculation module is also used to filter the second signal to be processed to obtain the current quality of the air conditioner, and trigger the defrost command when the difference between the current quality and the initial quality is greater than a preset quality difference.

[0061] The variable shunt heat flow defrost control device provided by the present application first obtains the outdoor ambient temperature when receiving the defrost command; then, determines the shunt mode according to the outdoor ambient temperature, controls the electronic expansion valve to open to the maximum opening, and controls the shunt device to shunt the refrigerant according to the determined shunt mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the shunt mode of the shunt device includes: single-way shunt and double-way shunt; one end of the shunt device is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0062] Figure 5 The physical structure diagram of an electronic device is shown as an example. The electronic device may be the above-mentioned air conditioner. Figure 5As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530 and a communication bus 540, wherein the processor 510, the communication interface 520 and the memory 530 communicate with each other through the communication bus 540. The processor 510 may call the logic instructions in the memory 530 to execute the variable split heat flow defrosting control method, which includes: first, obtaining the outdoor ambient temperature when receiving the defrosting instruction; then, determining the split mode according to the outdoor ambient temperature, controlling the electronic expansion valve to open to the maximum opening and controlling the splitter to split the refrigerant according to the determined split mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the split mode of the splitter includes: single-way splitting and double-way splitting; one end of the splitter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0063] In addition, the logic instructions in the above-mentioned memory 530 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0064] On the other hand, the present application also provides a computer program product, the computer program product includes a computer program stored on a computer-readable storage medium, the computer program includes program instructions, when the program instructions are executed by the computer, the computer can execute the variable split heat flow defrosting control method provided by the above methods, the method comprising: first, in the case of receiving a defrosting instruction, obtaining the outdoor ambient temperature; then, determining the split mode according to the outdoor ambient temperature, and controlling the electronic expansion valve to open to the maximum opening and controlling the splitter to split the refrigerant according to the determined split mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the split mode of the splitter includes: single-way splitting and double-way splitting; one end of the splitter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0065] On the other hand, the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it is implemented to execute the variable shunt heat flow defrosting control method provided above, the method comprising: first, in the case of receiving a defrost instruction, obtaining the outdoor ambient temperature; then, determining the shunt mode according to the outdoor ambient temperature, and controlling the electronic expansion valve to open to the maximum opening and controlling the shunt to shunt the refrigerant according to the determined shunt mode; wherein the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the shunt mode of the shunt includes: single-way shunt and double-way shunt; one end of the shunt is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit. In this way, when the air conditioner is defrosted, the heating effect of the indoor unit can still be maintained, reducing the impact of the air conditioner defrosting on the indoor ambient temperature.

[0066] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0067] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A variable split heat flow defrosting control method, characterized in that: Applied to a control unit of an air conditioner, the method comprises: When receiving a defrost command, obtaining the outdoor ambient temperature; Determine the diversion mode according to the outdoor ambient temperature, control the electronic expansion valve to open to the maximum opening, and control the diverter to divert the refrigerant according to the determined diversion mode; Among them, the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion mode of the diverter includes: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

2. The method according to claim 1, characterized in that Determining the diversion mode according to the outdoor ambient temperature, controlling the electronic expansion valve to open to the maximum opening and performing diversion according to the determined diversion mode, includes: When the outdoor ambient temperature is greater than a preset temperature threshold, the diversion method is determined to be two-way diversion, and the diverter is controlled to divert the refrigerant according to the two-way diversion method.

3. The method according to claim 1, characterized in that Determining the diversion mode according to the outdoor ambient temperature, controlling the electronic expansion valve to open to the maximum opening and performing diversion according to the determined diversion mode, includes: When the outdoor ambient temperature is less than or equal to a preset temperature threshold, the diversion mode is determined to be single-way diversion, and the diverter is controlled to divert the refrigerant according to the single-way diversion mode.

4. The method according to claim 1, characterized in that: After receiving the defrost instruction sent by the outdoor unit, the method further includes: The fan speed of the indoor unit is controlled so that the coil temperature of the indoor unit is maintained within a preset temperature range.

5. The method according to any one of claims 1 to 4, characterized in that In the case where the defrost instruction is received, before obtaining the outdoor ambient temperature, the method further includes: After the air conditioner is powered on and runs in a heating mode for a first preset time, a first signal to be processed of the outdoor unit is obtained, and the first signal to be processed is filtered to obtain the initial quality of the air conditioner; the signal to be processed includes: a piezoelectric signal of the outdoor unit collected at multiple time points; the piezoelectric signal is used to characterize the quality of the outdoor unit; A second signal to be processed of the outdoor unit is acquired in real time, the current quality of the air conditioner is obtained after filtering the second signal to be processed, and the defrost instruction is triggered when the difference between the current quality and the initial quality is greater than a preset quality difference.

6. A variable split heat flow defrost control device, characterized in that: The device comprises: An acquisition module is used to acquire the outdoor ambient temperature when a defrost command is received; A determination module, used to determine a diversion method according to the outdoor ambient temperature; A control module is used to control the electronic expansion valve to open to the maximum opening, and control the diverter to divert the refrigerant according to the determined diversion method; Among them, the electronic expansion valve is: a throttling unit arranged between the indoor unit and the outdoor unit of the air conditioner; the diversion mode of the diverter includes: single-way diversion and double-way diversion; one end of the diverter is connected to the electronic expansion valve, and the other end is connected to the heat exchanger on the outdoor unit.

7. The device according to claim 6, characterized in that The determining module is specifically used to determine that the diversion mode is two-way diversion when the outdoor ambient temperature is greater than a preset temperature threshold; The control module is specifically used to control the diverter to divert the refrigerant in a two-way diversion manner.

8. The device according to claim 6, characterized in that The determining module is specifically configured to determine that the diversion mode is single-path diversion when the outdoor ambient temperature is less than or equal to a preset temperature threshold; The control module is specifically used to control the diverter to divert the refrigerant according to the diversion method of single-path diversion.

9. An air conditioner, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the variable split heat flow defrosting control method according to any one of claims 1 to 5 when executing the program.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the steps of the variable split heat flow defrosting control method according to any one of claims 1 to 5 are implemented.

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