Air conditioner defrosting method and device, air conditioner and computer readable storage medium

Abstract

The invention relates to the technical field of air conditioners, and discloses a defrosting method for an air conditioner, the air conditioner comprises an outdoor unit and a plurality of indoor units, and each indoor unit comprises a first heat exchanger and a second heat exchanger which are arranged in parallel; the method comprises the steps that under the condition that defrosting conditions are met, indoor personnel conditions corresponding to a plurality of indoor units are obtained; according to the indoor personnel conditions corresponding to the multiple indoor units, the working states of a first heat exchanger and a second heat exchanger of each indoor unit are adjusted; and controlling the air conditioner to execute a defrosting mode. On one hand, a non-stop defrosting scheme can be operated, so that the defrosting requirement of the outdoor unit can be met in time. On the other hand, the temperature fluctuation in the room where the user is located can be reduced, and the user comfort can be improved. The invention further discloses a defrosting device for the air conditioner, the air conditioner and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to a method and device for defrosting an air conditioner, an air conditioner, and a computer-readable storage medium. Background Art

[0002] At present, when the heat pump air conditioner is in heating operation, the coil of the outdoor unit is always in a low temperature state. At this time, if the outdoor environment is in a low temperature and high humidity, the coil of the outdoor heat exchanger is easy to frost. The occurrence of this frosting phenomenon will affect the heat exchange efficiency of the outdoor unit, causing the heat exchange effect of the air conditioner to continue to weaken, thereby affecting the comfort of the indoor environment. Therefore, it is necessary to defrost the outdoor unit coil of the air conditioner in a timely and effective manner. The relevant technology proposes to switch the air conditioner from heating mode to cooling mode for defrosting, and stop the indoor and outdoor fans during defrosting.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] Related technologies can use high-temperature refrigerants to melt the frost layer, but when the indoor temperature switches from heating to cooling, the cold released by the indoor heat exchanger will cause the indoor temperature to drop, resulting in large indoor temperature fluctuations. This will then cause indoor users to experience alternating temperatures, reducing their comfort.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method, device, air conditioner, and computer-readable storage medium for defrosting an air conditioner, which can reduce temperature fluctuations in the room where the user is located, thereby improving the user's comfort.

[0008] In some embodiments, the air conditioner includes an outdoor unit and multiple indoor units, each indoor unit includes a first heat exchanger and a second heat exchanger arranged in parallel; the method includes: when the defrost conditions are met, obtaining the indoor personnel conditions corresponding to each of the multiple indoor units; according to the indoor personnel conditions corresponding to each of the multiple indoor units, adjusting the working status of the first heat exchanger and the second heat exchanger of each indoor unit; and controlling the air conditioner to execute the defrost mode.

[0009] In some embodiments, the device includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for defrosting an air conditioner when running the program instructions.

[0010] In some embodiments, the air conditioner includes: an outdoor unit; multiple indoor units, each indoor unit includes a first heat exchanger and a second heat exchanger arranged in parallel; the above-mentioned device for defrosting the air conditioner is electrically connected to the multiple indoor units respectively.

[0011] In some embodiments, the computer-readable storage medium stores program instructions, and when the program instructions are executed, the computer executes the above-mentioned method for defrosting an air conditioner.

[0012] The method, device, air conditioner, and computer-readable storage medium for defrosting an air conditioner provided in the embodiments of the present disclosure can achieve the following technical effects:

[0013] In the disclosed embodiment, when the air conditioner meets the defrost conditions, the indoor occupancy conditions of the rooms where the multiple indoor units are located can be obtained respectively to determine which indoor units have the corresponding heating conditions. Then the disclosed embodiment configures the working state of the first heat exchanger and the second heat exchanger of each indoor unit accordingly, so that each indoor unit can achieve its corresponding functional requirements. On the one hand, the non-stop defrosting solution can be run, so that the defrosting requirements of the outdoor unit can be met in time. On the other hand, the temperature fluctuation in the room where the user is located can be reduced, which is conducive to improving the user's comfort.

[0014] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0016] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present disclosure;

[0017] Figure 2 is a schematic diagram of a first defrost mode of an air conditioner provided by an embodiment of the present disclosure;

[0018] Figure 3 is a schematic diagram of a second defrosting mode of an air conditioner provided by an embodiment of the present disclosure;

[0019] Figure 4 is a schematic diagram of a third defrost mode of an air conditioner provided by an embodiment of the present disclosure;

[0020] Figure 5 is a schematic diagram of a fourth defrost mode of an air conditioner provided by an embodiment of the present disclosure;

[0021] Figure 6 is a schematic diagram of a fifth defrost mode of an air conditioner provided by an embodiment of the present disclosure;

[0022] Figure 7 is a schematic diagram of a method for defrosting an air conditioner provided by an embodiment of the present disclosure;

[0023] Figure 8 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;

[0024] Fig. 9 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;

[0025] Fig.10 is a schematic diagram of another method for defrosting an air conditioner provided by an embodiment of the present disclosure;

[0026] Fig.11 It is a schematic diagram of a device for defrosting an air conditioner provided in an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 100: outdoor unit; 200: indoor unit; 201: indoor unit one; 202: indoor unit two; 203: indoor unit three; 10: compressor; 11: medium-pressure cylinder; 12: low-pressure cylinder; 21: four-way valve; 22: three-way valve; 30: outdoor heat exchanger; 41: first heat exchanger; 42: second heat exchanger; 51: first throttle valve; 52: second throttle valve; 53: third throttle valve; 54: control valve; 61: outdoor fan; 62: indoor fan; 71: first gas-liquid separator; 72: second gas-liquid separator; 300: defrosting device for air conditioner; 301: processor; 302: memory; 303: communication interface; 304: bus. DETAILED DESCRIPTION

[0029] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0030] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0031] Unless otherwise stated, the term "plurality" means two or more.

[0032] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0033] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0034] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0035] Combination Figure 1 As shown, an embodiment of the present disclosure provides an air conditioner, including: an outdoor unit 100 and a plurality of indoor units 200, each of the indoor units 200 including a first heat exchanger 41 and a second heat exchanger 42 arranged in parallel.

[0036] With the air conditioner provided by the embodiment of the present disclosure, each indoor unit 200 is configured with a first heat exchanger 41 and a second heat exchanger 42. By controlling the actual working states of the two, each indoor unit 200 can achieve its corresponding functional requirements. Thus, while meeting the defrosting requirements of the outdoor unit, the temperature fluctuation in the room where the user is located is effectively reduced, which is conducive to improving the user's comfort.

[0037] Optionally, the outdoor unit 100 includes a compressor 10, a four-way valve 21, a three-way valve 22 and an outdoor heat exchanger 30. The compressor 10 includes a medium-pressure cylinder 11 and a low-pressure cylinder 12. The four-way valve 21 is connected to the exhaust port of the compressor 10 and to the suction port of the medium-pressure cylinder 11. The three-way valve 22 is connected to the exhaust port of the compressor 10 and to the suction port of the low-pressure cylinder 12. The outdoor heat exchanger 30 is connected to the four-way valve 21. In this way, the compressor 10 includes two independently compressible cylinders with different internal pressures, which can reduce system energy consumption and improve the working performance of the air conditioner.

[0038] Optionally, the indoor unit 200 includes a first heat exchanger 41, a second heat exchanger 42, a first throttle valve 51 and a second throttle valve 52. The first heat exchanger 41 is connected to the outdoor heat exchanger 30 and is connected to the four-way valve 21. The second heat exchanger 42 is connected to the outdoor heat exchanger 30 and is connected to the three-way valve 22. The first throttle valve 51 is provided at the inlet pipeline of the first heat exchanger 41 in the cooling mode. The second throttle valve 52 is provided at the inlet pipeline of the second heat exchanger 42 in the cooling mode. In this way, the actual working states of the first heat exchanger 41 and the second heat exchanger 42 of each indoor unit 200 can be controlled respectively by adjusting the opening of the first throttle valve 51 and the second throttle valve 52, so that each indoor unit can achieve its corresponding functional requirements.

[0039] Optionally, the outdoor unit 100 further includes a third throttle valve 53. The third throttle valve 53 is provided at the outlet pipe of the outdoor heat exchanger 30 in the cooling mode. In this way, the working state of the outdoor heat exchanger 30 can be controlled by adjusting the opening of the third throttle valve 53, so that the air conditioner is executed in a suitable operating mode.

[0040] Optionally, the outdoor unit 100 further includes an outdoor fan 61. The outdoor fan 61 is disposed relative to the outdoor heat exchanger 30. In this way, the embodiment of the present disclosure can enhance the heat exchange effect of the outdoor heat exchanger 30 through the outdoor fan 61, which is beneficial to improving the working efficiency of the air conditioner.

[0041] Optionally, the indoor unit 200 further includes an indoor fan 62. The indoor fan 62 is arranged relative to the first heat exchanger 41. In this way, the embodiment of the present disclosure can enhance the heat exchange effect of the indoor heat exchanger through the indoor fan 62, which is conducive to improving the working efficiency of the air conditioner.

[0042] Optionally, the outdoor unit 100 further includes a first gas-liquid separator 71. The gas-liquid separator 71 is disposed in front of the air inlet of the medium-pressure cylinder 11. Thus, by disposing the first gas-liquid separator 71 in front of the air inlet of the medium-pressure cylinder 11, the embodiment of the present disclosure can prevent the liquid refrigerant from flowing back to the compressor 10 to cause liquid hammer, which is conducive to ensuring the reliable operation of the air conditioner.

[0043] Optionally, the outdoor unit 100 further includes a second gas-liquid separator 72. The gas-liquid separator 72 is disposed in front of the air inlet of the low-pressure cylinder 12. Thus, by disposing the second gas-liquid separator 72 in front of the air inlet of the low-pressure cylinder 12, the disclosed embodiment can prevent the liquid refrigerant from flowing back to the compressor 10 to cause liquid hammer, which is conducive to ensuring the reliable operation of the air conditioner.

[0044] Optionally, the outdoor unit 100 further includes a control valve 54. The control valve 54 is used to connect the refrigerant pipeline between the four-way valve 21 and the first gas-liquid separator 71 and the refrigerant pipeline between the three-way valve 22 and the second gas-liquid separator 72. In this way, the suction pipeline of the medium-pressure cylinder 11 and the suction pipeline of the low-pressure cylinder 12 can be connected through the control valve 54, so that the capacity of the compressor 10 can be fully utilized.

[0045] Optionally, combined Figure 2 As shown, the embodiment of the present disclosure provides a schematic diagram of the first defrost mode of an air conditioner. Optionally, there are three indoor units 200, specifically including indoor unit 1 201, indoor unit 2 202 and indoor unit 3 203. Among them, in the first defrost mode, the third throttle valve 53 of the outdoor unit 100 and the second throttle valve 52 of the indoor unit 1 201 can be controlled to be fully opened, the first throttle valve 51 of the indoor unit 2 202 and the first throttle valve 51 of the indoor unit 3 203 can be controlled to be throttled, and the first throttle valve 51 of the indoor unit 1 201, the first throttle valve 51 of the indoor unit 2 202 and the second throttle valve 52 of the indoor unit 3 203 can be controlled to be closed. Further, the indoor fan 62 of the indoor unit 1 201 can be controlled to rotate at a high speed, and the indoor fans 62 corresponding to the outdoor fan 61, the indoor unit 2 202 and the indoor unit 3 203 can be controlled to stop rotating.

[0046] In this way, the indoor unit 1 201 has only the second heat exchanger 42 working as a condenser (the light-colored heat exchanger in the figure), and the temperature fluctuation in the corresponding room is small or even non-existent, which can meet the actual heating needs of the users inside and is conducive to ensuring the comfort of the users. The indoor unit 2 2021 and the indoor unit 3 203 have only the first heat exchanger 41 working as an evaporator (the dark-colored heat exchanger in the figure), and there is a temperature fluctuation phenomenon in the corresponding room. However, by selecting an unmanned room for heat extraction, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit, so as to meet the defrosting needs of the outdoor unit in a timely manner.

[0047] Optionally, combined Figure 3 As shown, the embodiment of the present disclosure provides a schematic diagram of the second defrost mode of an air conditioner. Optionally, there are three indoor units 200, specifically including indoor unit 1 201, indoor unit 2 202 and indoor unit 3 203. Among them, in the second defrost mode, the third throttle valve 53 of the outdoor unit 100 and the second throttle valve 52 of the indoor unit 1 201 can be controlled to be fully opened, the first throttle valve 51 of the indoor unit 1 201, the first throttle valve 51 of the indoor unit 2 202 and the first throttle valve 51 of the indoor unit 3 203 are controlled to be throttled, and the first throttle valve 51 of the indoor unit 2 202 and the second throttle valve 52 of the indoor unit 3 203 are controlled to be closed. Further, the indoor fan 62 of the indoor unit 1 201 can be controlled to rotate at a low speed, and the indoor fans 62 corresponding to the outdoor fan 61, the indoor unit 2 202 and the indoor unit 3 203 can be controlled to stop rotating.

[0048] In this way, the first heat exchanger 41 of the indoor unit 1 201 works as an evaporator (dark heat exchanger in the figure), and the second heat exchanger 42 works as a condenser (light heat exchanger in the figure) to compensate for indoor temperature fluctuations. The second heat exchanger 42 is closer to the air outlet, so the actual indoor temperature fluctuation is relatively small, and the defrosting speed of the outdoor unit 100 is faster. In the indoor unit 2 201 and the indoor unit 3 203, only the first heat exchanger 41 works as an evaporator, and there is a temperature fluctuation phenomenon in the corresponding room. However, by selecting an unmanned room for heat extraction, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit to meet the defrosting needs of the outdoor unit in a timely manner.

[0049] Optionally, combined Figure 4 As shown, the embodiment of the present disclosure provides a schematic diagram of the third defrost mode of an air conditioner. Optionally, there are three indoor units 200, specifically including indoor unit 1 201, indoor unit 2 202 and indoor unit 3 203. Among them, in the third defrost mode, the third throttle valve 53 of the outdoor unit 100, the second throttle valve 52 of the indoor unit 1 201 and the second throttle valve 52 of the indoor unit 2 202 can be controlled to be fully opened, the first throttle valve 51 of the indoor unit 2 202 and the first throttle valve 51 of the indoor unit 3 203 can be controlled to be throttled, and the first throttle valve 51 of the indoor unit 1 201 and the second throttle valve 52 of the indoor unit 3 203 can be controlled to be closed. Further, the indoor fan 62 of the indoor unit 1 201 can be controlled to rotate at a high speed, the indoor fan 62 of the indoor unit 2 202 can be controlled to rotate at a low speed, and the outdoor fan 61 and the indoor fan 62 of the indoor unit 3 203 can be controlled to stop rotating.

[0050] In this way, the indoor unit 1 201 has only the second heat exchanger 42 working as a condenser (the light-colored heat exchanger in the figure), and the temperature fluctuation in the corresponding room is very small or even non-existent, which can meet the actual heating needs of the users inside and is conducive to ensuring the comfort of the users. The first heat exchanger 41 of the indoor unit 201 works as an evaporator (the dark-colored heat exchanger in the figure), while the second heat exchanger 42 works as a condenser to compensate for the indoor temperature fluctuation. The second heat exchanger 42 is closer to the air outlet, so the actual indoor temperature fluctuation is relatively small, and the defrosting speed of the outdoor unit 100 is faster. The indoor unit 3 203 has only the first heat exchanger 41 working as an evaporator, and there is a temperature fluctuation phenomenon in the corresponding room. However, by selecting an unmanned room for heat extraction, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit, so as to meet the defrosting needs of the outdoor unit in a timely manner.

[0051] Optionally, combined Figure 5As shown, the embodiment of the present disclosure provides a schematic diagram of the fourth defrost mode of an air conditioner. Optionally, there are three indoor units 200, specifically including indoor unit 1 201, indoor unit 2 202 and indoor unit 3 203. Among them, in the fourth defrost mode, the third throttle valve 53 of the outdoor unit 100, the second throttle valve 52 of the indoor unit 1 201, the second throttle valve 52 of the indoor unit 2 202 and the second throttle valve 52 of the indoor unit 3 203 can be controlled to be fully opened, and the first throttle valve 51 of the indoor unit 1 201, the first throttle valve 51 of the indoor unit 2 202 and the first throttle valve 51 of the indoor unit 3 203 can be controlled to be throttled. Further, the outdoor fan 61 can be controlled to stop rotating, and the indoor fans 62 of the indoor unit 1 201, the indoor unit 2 202 and the indoor unit 3 203 can be controlled to rotate at a low speed.

[0052] In this way, the first heat exchangers 41 of the indoor unit 1 201, the indoor unit 2 202 and the indoor unit 3 203 all work as evaporators (dark heat exchangers in the figure), while the second heat exchangers 42 all work as condensers (light heat exchangers in the figure) to compensate for indoor temperature fluctuations, and the second heat exchanger 42 is closer to the air outlet, so the actual indoor temperature fluctuation is relatively small, and the defrosting speed of the outdoor unit 100 is faster. In this case, the differences in personnel situations in different rooms can be ignored, so that while meeting the defrosting needs of the outdoor units, the temperature fluctuations in each room can be reduced as much as possible, which is conducive to ensuring user comfort.

[0053] Optionally, combined Figure 6 As shown, the embodiment of the present disclosure provides a schematic diagram of the fifth defrost mode of an air conditioner. Optionally, there are three indoor units 200, specifically including indoor unit 1 201, indoor unit 2 202 and indoor unit 3 203. Among them, in the fifth defrost mode, the third throttle valve 53 of the outdoor unit 100 can be controlled to be fully opened, and the first throttle valve 51 and the second throttle valve 52 of the indoor unit 1 201, the first throttle valve 51 and the second throttle valve 52 of the indoor unit 2 202, and the first throttle valve 51 and the second throttle valve 52 of the indoor unit 3 203 are controlled to be throttled. Further, the indoor fans 62 of the outdoor fan 61, the indoor unit 1 201, the indoor unit 2 202 and the indoor unit 3 203 can be controlled to stop rotating.

[0054] In this way, the first heat exchanger 41 and the second heat exchanger 42 corresponding to the indoor unit 1 201, the indoor unit 2 201 and the indoor unit 3 203 respectively work as evaporators (the dark heat exchangers in the figure). At this time, the defrosting speed of the outdoor unit is the fastest, and its rapid defrosting needs can be met in time when the outdoor unit is severely frosted.

[0055] Optionally, the air conditioner further includes a control device 300 for defrosting the air conditioner. The control device 300 for defrosting the air conditioner is electrically connected to the plurality of indoor units 200. In this way, the embodiment of the present disclosure can execute a corresponding control method through the device 300 to control the air conditioner to execute a suitable defrosting mode.

[0056] Based on the above air conditioner, combined with Figure 7 As shown, the embodiment of the present disclosure provides a method for defrosting an air conditioner, comprising:

[0057] S101, when the defrosting conditions are met, the processor obtains the indoor personnel status corresponding to each of the multiple indoor units.

[0058] S102: The processor adjusts the working state of the first heat exchanger and the second heat exchanger of each indoor unit according to the indoor occupant conditions corresponding to each of the multiple indoor units.

[0059] S103, the processor controls the air conditioner to execute a defrost mode.

[0060] By using the method for defrosting an air conditioner provided by the embodiment of the present disclosure, when the air conditioner meets the defrosting conditions, the indoor occupancy conditions of the rooms where the multiple indoor units are located can be obtained respectively to determine which indoor units have the corresponding heating conditions. Then the embodiment of the present disclosure configures the working state of the first heat exchanger and the second heat exchanger of each indoor unit accordingly, so that each indoor unit can achieve its corresponding functional requirements. On the one hand, a non-stop defrosting solution can be run, so that the defrosting requirements of the outdoor unit can be met in time. On the other hand, the temperature fluctuation in the room where the user is located can be reduced, which is conducive to improving the user's comfort.

[0061] Optionally, the processor adjusts the working states of the first heat exchanger and the second heat exchanger of each indoor unit according to the indoor occupancy situations corresponding to each of the multiple indoor units, including: the processor counts the indoor occupancy situations corresponding to each of the multiple indoor units, and determines the total horsepower of the first indoor unit and the total horsepower of the second indoor unit; wherein, there is someone in the room corresponding to the first indoor unit, and there is no one in the room corresponding to the second indoor unit; the processor adjusts the working states of the first heat exchanger and the second heat exchanger of each indoor unit according to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit.

[0062] In this way, when the air conditioner meets the defrost conditions, the disclosed embodiment can count the indoor personnel situation of the rooms where multiple indoor units are located respectively, and determine the sum of the horsepower of all the first indoor units where there are people, and the sum of the horsepower of all the second indoor units where there are no people, and then by analyzing the difference in the total horsepower of the two, the disclosed embodiment can determine whether the second indoor unit that meets the heat-taking conditions can also meet the heating demand of the first indoor unit. Then, the disclosed embodiment configures the working state of the first heat exchanger and the second heat exchanger of each indoor unit accordingly, so as to control the first indoor unit and the second indoor unit to respectively realize their corresponding functional requirements. On the one hand, the non-stop defrosting solution can be run, so that the defrosting demand of the outdoor unit can be met in time. On the other hand, the temperature fluctuation in the room where the user is located can be reduced, which is conducive to improving the user's comfort.

[0063] Optionally, the processor adjusts the working states of the first heat exchanger and the second heat exchanger of each indoor unit according to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, including: when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is within a preset ratio range, the processor controls the first heat exchanger of the first indoor unit not to work, and controls the second heat exchanger of the first indoor unit to work as a condenser; the processor controls the first heat exchanger of the second indoor unit to work as an evaporator, and controls the second heat exchanger of the second indoor unit not to work.

[0064] In this way, when the ratio of the total number of the second indoor units to the total number of the first indoor units is within the preset ratio range, it indicates that the heat absorbed by all the second indoor units without people in the room can meet the defrosting demand of the outdoor unit while also meeting the heating demand of all the first indoor units with people in the room. At this time, the disclosed embodiment can control the first heat exchanger of the first indoor unit not to work, and control the second heat exchanger of the first indoor unit to work as a condenser. At this time, the temperature fluctuation in the room where the user is located is very small or even no temperature fluctuation, which can meet the actual heating demand of the user and is conducive to ensuring the comfort of the user. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of the second indoor unit can be controlled not to work. While avoiding adverse effects on the user, it can also greatly speed up the defrosting speed of the outdoor unit and meet the defrosting demand of the outdoor unit in a timely manner.

[0065] Optionally, the processor adjusts the working states of the first heat exchanger and the second heat exchanger of each indoor unit according to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, including: when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is less than the lower limit of a preset ratio range, the processor controls part or all of the first heat exchangers of the first indoor unit to operate as evaporators, and controls the second heat exchanger of the first indoor unit to operate as condensers; the processor controls the first heat exchanger of the second indoor unit to operate as an evaporator, and controls the second heat exchanger of the second indoor unit not to operate.

[0066] In this way, when the ratio of the total number of the second indoor units to the total number of the first indoor units is less than the lower limit of the preset ratio range, it indicates that the heat absorbed by all the second indoor units without people in the room cannot simultaneously meet the defrosting demand of the outdoor unit and the heating demand of all the first indoor units with people in the room. At this time, the embodiment of the present disclosure can control the first heat exchanger of some or all of the first indoor units to work as an evaporator, and control the second heat exchanger of all the first indoor units to work as a condenser, so as to increase the heat that the air conditioner can absorb, so as to better guarantee the defrosting demand of the outdoor unit and the heating demand of the first indoor unit. And the second heat exchanger is closer to the air outlet, so as to compensate for the indoor temperature fluctuation of the user, so the actual indoor temperature fluctuation is relatively small. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of the second indoor unit can be controlled not to work, which can greatly speed up the defrosting speed of the outdoor unit while avoiding adverse effects on the user, so as to meet the defrosting demand of the outdoor unit in time.

[0067] Optionally, the processor adjusts the working states of the first heat exchanger and the second heat exchanger of each indoor unit according to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, including: when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is greater than the upper limit value of a preset ratio range, the processor controls the first heat exchanger of the first indoor unit not to work, and controls the second heat exchanger of the first indoor unit to work as a condenser; the processor controls the first heat exchanger of the second indoor unit to work as an evaporator, and controls part or all of the second heat exchangers of the second indoor unit to work as condensers.

[0068] In this way, when the ratio of the total number of the second indoor units to the total number of the first indoor units is greater than the upper limit of the preset ratio range, it indicates that the heat absorbed by all the unmanned second indoor units far exceeds the defrosting demand of the outdoor unit and the heating demand of all the first indoor units with people in the room. At this time, the embodiment of the present disclosure can control the first heat exchanger of the first indoor unit not to work, and control the second heat exchanger of the first indoor unit to work as a condenser. At this time, the temperature fluctuation in the room where the user is located is very small or even no temperature fluctuation, which can meet the actual heating demand of the user and is conducive to ensuring the comfort of the user. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of some or all of the second indoor units can be controlled to work as a condenser, so that the heat used during the defrosting period can be compensated to prevent the temperature in the unmanned room from dropping too fast. And the second heat exchanger is closer to the air outlet, so the temperature fluctuation in the unmanned room is relatively small, and the defrosting speed of the outdoor unit is faster.

[0069] Optionally, the preset ratio range can be set in combination with the heat exchange area ratio of the first heat exchanger to the second heat exchanger, and / or the heat exchange area ratio of the outdoor heat exchanger to the indoor heat exchanger. Preferably, the preset ratio range can be set to [1.2, 2.0]. The preset ratio range can also be adjusted according to the air volume of the indoor fan, and can also be set to any other reasonable range.

[0070] Optionally, the defrost condition is determined to be satisfied in the following manner: the coil temperature of the outdoor heat exchanger is less than or equal to the first preset temperature. Thus, when the coil temperature of the outdoor heat exchanger is less than or equal to -6°C and lasts for 5 minutes, the defrost condition can be determined to be satisfied, so as to control the air conditioner to start the defrost mode.

[0071] Optionally, the defrost condition is determined to be met in the following manner: the accumulated heating time of the air conditioner is greater than or equal to a preset time. In this way, when the accumulated heating time of the air conditioner is greater than or equal to 60 minutes, the defrost condition can be determined to be met, so as to control the air conditioner to start the defrost mode.

[0072] Optionally, the method for defrosting an air conditioner further includes: when the coil temperature of the outdoor heat exchanger is less than or equal to a second preset temperature, the processor controls the air conditioner to execute a reverse cycle defrost mode. The second preset temperature is less than the first preset temperature. In this way, when the coil temperature of the outdoor heat exchanger is less than or equal to -12°C, it is judged that the defrost condition is met at this time, and the degree of frost on the outdoor unit is relatively serious. Therefore, the embodiment of the present disclosure can control the air conditioner to execute a reverse cycle defrost mode to melt the thick frost layer on the outdoor unit at the fastest defrost speed, thereby timely ensuring the heat exchange efficiency of the outdoor unit.

[0073] Specifically, combined Figure 6As shown, the processor can control the air conditioner to execute the fifth defrost mode, i.e., the reverse cycle defrost mode. At this time, the first heat exchanger and the second heat exchanger corresponding to the indoor unit 1, the indoor unit 2 and the indoor unit 3 respectively work as evaporators (the dark heat exchangers in the figure), and the defrosting speed of the outdoor unit is the fastest at this time, which can meet its rapid defrosting needs in time when the outdoor unit is severely frosted.

[0074] Based on the above air conditioner, combined with Figure 8 As shown, the embodiment of the present disclosure provides another method for defrosting an air conditioner, comprising:

[0075] S201, when the defrosting conditions are met, the processor obtains the indoor personnel status corresponding to each of the multiple indoor units.

[0076] S202, the processor counts the indoor occupancy status corresponding to each of the multiple indoor units, and determines the total number of the first indoor unit and the total number of the second indoor unit.

[0077] There is someone in the room corresponding to the first indoor unit, and there is no one in the room corresponding to the second indoor unit.

[0078] S203, when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is within a preset ratio range, the processor controls the first heat exchanger of the first indoor unit not to work, and controls the second heat exchanger of the first indoor unit to work as a condenser.

[0079] S204: The processor controls the first heat exchanger of the second indoor unit to operate as an evaporator, and controls the second heat exchanger of the second indoor unit not to operate.

[0080] S205, the processor controls the air conditioner to execute a defrost mode.

[0081] According to the method for defrosting an air conditioner provided by the embodiment of the present disclosure, when the ratio of the total number of the second indoor unit to the total number of the first indoor unit is within the preset ratio range, it indicates that the heat absorbed by the second indoor units in all unoccupied rooms can meet the defrosting requirements of the outdoor units while also meeting the heating requirements of the first indoor units in all occupied rooms. At this time, the embodiment of the present disclosure can control the first heat exchanger of the first indoor unit not to work, and control the second heat exchanger of the first indoor unit to work as a condenser. At this time, the temperature fluctuation in the room where the user is located is very small or even non-existent, which can meet the actual heating requirements of the user and is conducive to ensuring the comfort of the user. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of the second indoor unit can be controlled not to work. While avoiding adverse effects on the user, the defrosting speed of the outdoor unit can be greatly accelerated to meet the defrosting requirements of the outdoor unit in a timely manner.

[0082] Specifically, when the ratio of the total number of second indoor units to the total number of first indoor units is within the preset ratio range, it indicates that the heat absorbed by all unoccupied second indoor units can meet the defrosting needs of the outdoor units while also meeting the heating needs of all occupied first indoor units. Figure 2 As shown, the processor can control the air conditioner to execute the first defrost mode. At this time, there is someone in the room with indoor unit 1, and its second heat exchanger can be controlled to work as a condenser (the light-colored heat exchanger in the figure). The temperature fluctuation in the corresponding room is very small or even no temperature fluctuation, which can meet the actual heating needs of the internal users and is conducive to ensuring user comfort. There is no one in the room where indoor unit 2 and indoor unit 3 are located, and their first heat exchanger can be controlled to work as an evaporator (the dark-colored heat exchanger in the figure). There is a temperature fluctuation phenomenon in the corresponding room, but because the heat is taken in the unmanned room, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit to meet the defrosting needs of the outdoor unit in time.

[0083] Based on the above air conditioner, combined with Fig. 9 As shown, the embodiment of the present disclosure provides another method for defrosting an air conditioner, comprising:

[0084] S301, when the defrosting conditions are met, the processor obtains the indoor personnel status corresponding to each of the multiple indoor units.

[0085] S302, the processor counts the indoor occupancy status corresponding to each of the multiple indoor units, and determines the total number of the first indoor unit and the total number of the second indoor unit.

[0086] There is someone in the room corresponding to the first indoor unit, and there is no one in the room corresponding to the second indoor unit.

[0087] S303, when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is less than the lower limit of the preset ratio range, the processor controls part or all of the first heat exchangers of the first indoor unit to operate as evaporators, and controls the second heat exchangers of the first indoor unit to operate as condensers.

[0088] S304: The processor controls the first heat exchanger of the second indoor unit to operate as an evaporator, and controls the second heat exchanger of the second indoor unit not to operate.

[0089] S305, the processor controls the air conditioner to execute a defrost mode.

[0090] According to the method for defrosting an air conditioner provided by the embodiment of the present disclosure, when the ratio of the total number of the second indoor units to the total number of the first indoor units is less than the lower limit of the preset ratio range, it indicates that the heat absorbed by the second indoor units in all unoccupied rooms cannot simultaneously meet the defrosting requirements of the outdoor units and the heating requirements of the first indoor units in all occupied rooms. At this time, the embodiment of the present disclosure can control the first heat exchangers of some or all of the first indoor units to work as evaporators, and control the second heat exchangers of all the first indoor units to work as condensers, thereby increasing the heat that can be absorbed by the air conditioner to better ensure the defrosting requirements of the outdoor units and the heating requirements of the first indoor units. The second heat exchanger is closer to the air outlet, so that it can compensate for the indoor temperature fluctuations of the user, so the actual indoor temperature fluctuations are relatively small. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of the second indoor unit can be controlled not to work, which can greatly speed up the defrosting speed of the outdoor unit while avoiding adverse effects on the user, so as to meet the defrosting requirements of the outdoor unit in a timely manner.

[0091] Specifically, when the ratio of the total number of the second indoor units to the total number of the first indoor units is less than the lower limit of the preset ratio range, it indicates that the heat absorbed by all the unoccupied second indoor units cannot simultaneously meet the defrosting requirements of the outdoor units and the heating requirements of all the occupied first indoor units. Figure 3 As shown, the processor can control the air conditioner to execute the second defrost mode. At this time, there is someone in the room of indoor unit one, and its first heat exchanger can be controlled to work as an evaporator (the dark heat exchanger in the figure) to increase the heat that the air conditioner can absorb, so as to better guarantee the defrosting demand of the outdoor unit and the heating demand of the first indoor unit. The second heat exchanger works as a condenser (the light-colored heat exchanger in the figure) to compensate for the indoor temperature fluctuation, and the second heat exchanger is closer to the air outlet, so the actual indoor temperature fluctuation is relatively small, and the defrosting speed of the outdoor unit is faster. There is no one in the room where indoor unit two and indoor unit three are located, and their first heat exchangers can be controlled to work as evaporators. There is a temperature fluctuation phenomenon in the corresponding room, but because the heat is taken in the unmanned room, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit to meet the defrosting needs of the outdoor unit in time.

[0092] In particular, if there are people in all rooms, that is, only the first indoor unit exists at this time, and the second indoor unit does not exist. Figure 5As shown, the processor can control the air conditioner to execute the fourth defrost mode. At this time, there are people in the rooms where indoor unit 1, indoor unit 2 and indoor unit 3 are located, and their respective first heat exchangers can be controlled to work as evaporators (dark heat exchangers in the figure) to increase the amount of heat that the air conditioner can absorb, thereby better ensuring the defrosting needs of the outdoor unit and the heating needs of the first indoor unit. The second heat exchanger works as a condenser (light heat exchanger in the figure) to compensate for indoor temperature fluctuations, and the second heat exchanger is closer to the air outlet, so the actual indoor temperature fluctuations are relatively small, and the defrosting speed of the outdoor unit is faster. In this case, the air conditioner can run a non-stop defrosting solution, which can minimize temperature fluctuations in each room while meeting the defrosting needs of the outdoor unit, which is conducive to ensuring user comfort.

[0093] Optionally, the processor controls some or all of the first heat exchangers of the first indoor units to work as evaporators, including: the processor determines a target adjustment number of the first indoor units according to the degree of frost in the outdoor unit; the processor controls the first heat exchangers of the first indoor units of the target adjustment number to work as evaporators, wherein the degree of frost in the outdoor unit is positively correlated with the target adjustment number of the first indoor unit.

[0094] In this way, the embodiment of the present disclosure can be combined with the degree of frost on the outdoor unit to determine the actual defrost heat demand of the outdoor unit. When the degree of frost on the outdoor unit is more serious, it usually requires more defrost heat to melt the frost layer, so the embodiment of the present disclosure can set a larger target adjustment number for the first indoor unit. That is, the first heat exchangers of relatively more first indoor units are controlled to work as evaporators, thereby increasing the heat that the air conditioner can absorb to better ensure the defrost demand of the outdoor unit.

[0095] Optionally, the processor controls the first heat exchanger of the first indoor unit of the target adjustment quantity to operate as an evaporator, including: the processor obtains the indoor return air temperature difference corresponding to multiple first indoor units; the processor arranges the indoor return air temperature differences corresponding to multiple first indoor units in ascending order to obtain an indoor temperature difference sequence; the processor controls the first heat exchanger of the first indoor unit of the target adjustment quantity to operate as an evaporator according to the indoor temperature difference sequence.

[0096] In this way, the embodiment of the present disclosure can calculate the difference between the user-set temperature and the indoor return air temperature, obtain the indoor return air temperature difference corresponding to multiple first indoor units, and preferably select the first indoor unit with the smaller indoor return air temperature difference, and then control the first heat exchanger of the corresponding target adjustment number of the first indoor units to work as evaporators, thereby increasing the amount of heat that the air conditioner can absorb to better guarantee the defrosting needs of the outdoor unit.

[0097] Based on the above air conditioner, combined with Fig.10 As shown, the embodiment of the present disclosure provides another method for defrosting an air conditioner, comprising:

[0098] S401, when the defrosting conditions are met, the processor obtains the indoor personnel status corresponding to each of the multiple indoor units.

[0099] S402, the processor counts the indoor occupancy status corresponding to each of the multiple indoor units, and determines the total number of the first indoor unit and the total number of the second indoor unit.

[0100] There is someone in the room corresponding to the first indoor unit, and there is no one in the room corresponding to the second indoor unit.

[0101] S403, when the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is greater than the upper limit value of the preset ratio range, the processor controls the first heat exchanger of the first indoor unit not to work, and controls the second heat exchanger of the first indoor unit to work as a condenser.

[0102] S404, the processor controls the first heat exchanger of the second indoor unit to operate as an evaporator, and controls part or all of the second heat exchangers of the second indoor unit to operate as a condenser.

[0103] S405, the processor controls the air conditioner to execute a defrost mode.

[0104] According to the method for defrosting an air conditioner provided by the embodiment of the present disclosure, when the ratio of the total number of the second indoor units to the total number of the first indoor units is greater than the upper limit of the preset ratio range, it indicates that the heat absorbed by the second indoor units in all unmanned rooms far exceeds the defrosting demand of the outdoor units and the heating demand of the first indoor units in all occupied rooms. At this time, the embodiment of the present disclosure can control the first heat exchanger of the first indoor unit not to work, and control the second heat exchanger of the first indoor unit to work as a condenser. At this time, the temperature fluctuation in the room where the user is located is very small or even no temperature fluctuation, which can meet the actual heating demand of the user and is conducive to ensuring the comfort of the user. At the same time, the first heat exchanger of the second indoor unit can be controlled to work as an evaporator, and the second heat exchanger of some or all of the second indoor units can be controlled to work as a condenser, so that the heat used during the defrosting period can be compensated to prevent the temperature in the unmanned room from dropping too fast. And the second heat exchanger is closer to the air outlet, so the temperature fluctuation in the unmanned room is relatively small, and the defrosting speed of the outdoor unit is faster.

[0105] Specifically, when the ratio of the total number of the second indoor units to the total number of the first indoor units is greater than the upper limit of the preset ratio range, it indicates that the heat absorbed by all unoccupied second indoor units far exceeds the defrosting demand of the outdoor units and the heating demand of all occupied first indoor units. Figure 4As shown, the processor can control the air conditioner to perform the third defrost mode. At this time, there is someone in the room of indoor unit 1, and its second heat exchanger can be controlled to work as a condenser (the light-colored heat exchanger in the figure), and the temperature fluctuation in the corresponding room is very small or even no temperature fluctuation, which can meet the actual heating needs of the internal users and is conducive to ensuring the comfort of users. While there is no one in the room where indoor unit 2 and indoor unit 3 are located, the first heat exchanger of indoor unit 2 can be controlled to work as an evaporator (the dark-colored heat exchanger in the figure), and the second heat exchanger of indoor unit 2 can be controlled to work as a condenser, so as to compensate for the heat used during defrosting and prevent the temperature in the unmanned room from dropping too fast. And the second heat exchanger is closer to the air outlet, so the temperature fluctuation in the unmanned room is relatively small, and the defrosting speed of the outdoor unit is faster. At the same time, the first heat exchanger of indoor unit 3 is controlled to work as an evaporator, and there is a temperature fluctuation phenomenon in the corresponding room, but because the heat is taken in the unmanned room, it can effectively avoid adverse effects on users, and can greatly speed up the defrosting speed of the outdoor unit, so as to meet the defrosting needs of the outdoor unit in time.

[0106] In particular, if no one is in any room, that is, only the second indoor unit exists, and the first indoor unit does not exist. Figure 5 As shown, the processor can control the air conditioner to execute the fourth defrost mode. At this time, there is no one in the room where the indoor unit 1, indoor unit 2 and indoor unit 3 are located. The respective first heat exchangers can be controlled to work as evaporators (dark heat exchangers in the figure), and the second heat exchangers can be controlled to work as condensers (light heat exchangers in the figure), so as to compensate for the heat used during defrosting and prevent the temperature in the unmanned room from dropping too quickly. And the second heat exchanger is closer to the air outlet, so the temperature fluctuation in the unmanned room is relatively small, and the defrosting speed of the outdoor unit is faster. In this case, the air conditioner can run a non-stop defrosting solution, which can meet the defrosting needs of the outdoor unit while minimizing the temperature fluctuation in each room, which is conducive to ensuring user comfort.

[0107] Optionally, the processor controls some or all of the second heat exchangers of the second indoor units to work as condensers, including: the processor determines a target adjustment number of the second indoor units according to the degree of frost in the outdoor unit; the processor controls the second heat exchangers of the second indoor units of the target adjustment number to work as condensers, wherein the degree of frost in the outdoor unit is negatively correlated with the target adjustment number of the second indoor units.

[0108] In this way, the embodiment of the present disclosure can determine the actual defrosting heat demand of the outdoor unit in combination with the degree of frost on the outdoor unit. When the degree of frost on the outdoor unit is relatively light, it usually does not require too much defrosting heat to melt the frost layer, so the embodiment of the present disclosure can set a larger target adjustment number for the second indoor unit. That is, the second heat exchangers of relatively more second indoor units are controlled to work as condensers, so as to compensate for the heat used during defrosting and prevent the temperature in the unmanned room from dropping too quickly and affecting the comfort of the room.

[0109] Optionally, the processor controls the second heat exchanger of the second indoor unit with the target adjustment number to work as a condenser, including: the processor obtains the indoor ambient temperatures corresponding to the multiple second indoor units; the processor arranges the indoor ambient temperatures corresponding to the multiple second indoor units in ascending order to obtain an indoor temperature sequence; the processor controls the second heat exchanger of the second indoor unit with the target adjustment number to work as a condenser according to the indoor temperature sequence.

[0110] In this way, the embodiment of the present disclosure can obtain the indoor ambient temperatures corresponding to multiple second indoor units, and preferably select the second indoor unit with a lower indoor ambient temperature, and then control the second heat exchangers of the corresponding target adjustment number of second indoor units to work as condensers, thereby compensating for the heat used during defrosting and preventing the temperature in the unmanned room from dropping too quickly and affecting the comfort indoors.

[0111] Combination Fig.11 As shown, the embodiment of the present disclosure provides a device 300 for defrosting an air conditioner, including a processor 301 and a memory 302. Optionally, the device 300 may also include a communication interface 303 and a bus 304. The processor 301, the communication interface 303, and the memory 302 may communicate with each other through the bus 304. The communication interface 303 may be used for information transmission. The processor 301 may call the logic instructions in the memory 302 to execute the method for defrosting an air conditioner of the above embodiment.

[0112] In addition, the logic instructions in the memory 302 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0113] The memory 302 is a computer-readable storage medium that can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 301 executes the function application and data processing by running the program instructions / modules stored in the memory 302, that is, the method for defrosting the air conditioner in the above embodiment is implemented.

[0114] The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 302 may include a high-speed random access memory and may also include a non-volatile memory.

[0115] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for defrosting an air conditioner.

[0116] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes.

[0117] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0118] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0119] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. 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 units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0120] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order 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, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for defrosting an air conditioner, characterized in that: The air conditioner comprises an outdoor unit and a plurality of indoor units, each of the indoor units comprises a first heat exchanger and a second heat exchanger arranged in parallel; the method comprises: When the defrosting conditions are met, the indoor personnel status corresponding to each of the multiple indoor units is obtained; According to the indoor occupancy conditions corresponding to the multiple indoor units, the working states of the first heat exchanger and the second heat exchanger of each indoor unit are adjusted; Control the air conditioner to perform defrost mode.

2. The method according to claim 1, characterized in that According to the indoor occupant conditions corresponding to the multiple indoor units, the working states of the first heat exchanger and the second heat exchanger of each indoor unit are adjusted, including: Counting the indoor occupancy status of each of the multiple indoor units, and determining the total number of the first indoor unit and the total number of the second indoor unit; wherein the room corresponding to the first indoor unit has occupancy, and the room corresponding to the second indoor unit has no occupancy; According to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, the working states of the first heat exchanger and the second heat exchanger of each indoor unit are adjusted.

3. The method according to claim 2, characterized in that According to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, the working state of the first heat exchanger and the second heat exchanger of each indoor unit is adjusted, including: When the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is within a preset ratio range, the first heat exchanger of the first indoor unit is controlled not to work, and the second heat exchanger of the first indoor unit is controlled to work as a condenser; The first heat exchanger of the second indoor unit is controlled to operate as an evaporator, and the second heat exchanger of the second indoor unit is controlled not to operate.

4. The method according to claim 2, characterized in that: According to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, the working state of the first heat exchanger and the second heat exchanger of each indoor unit is adjusted, including: When the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is less than the lower limit of the preset ratio range, controlling the first heat exchangers of some or all of the first indoor units to operate as evaporators, and controlling the second heat exchangers of the first indoor units to operate as condensers; The first heat exchanger of the second indoor unit is controlled to operate as an evaporator, and the second heat exchanger of the second indoor unit is controlled not to operate.

5. The method according to claim 4, characterized in that Controlling a part or all of the first heat exchangers of the first indoor units to work as evaporators includes: Determining a target adjustment quantity of the first indoor unit according to the degree of frost on the outdoor unit; Controlling the first heat exchanger of the first indoor unit of the target adjustment number to operate as an evaporator; Among them, the frost degree of the outdoor unit is positively correlated with the target adjustment quantity of the first indoor unit.

6. The method according to claim 2, characterized in that According to the total horsepower of the first indoor unit and the total horsepower of the second indoor unit, the working state of the first heat exchanger and the second heat exchanger of each indoor unit is adjusted, including: When the ratio of the total horsepower of the second indoor unit to the total horsepower of the first indoor unit is greater than the upper limit of the preset ratio range, the first heat exchanger of the first indoor unit is controlled not to work, and the second heat exchanger of the first indoor unit is controlled to work as a condenser; The first heat exchanger of the second indoor unit is controlled to operate as an evaporator, and the second heat exchangers of part or all of the second indoor units are controlled to operate as condensers.

7. The method according to claim 6, characterized in that Controlling the second heat exchanger of part or all of the second indoor units to work as a condenser includes: According to the degree of frost on the outdoor unit, the target adjustment quantity of the second indoor unit is determined; Controlling the second heat exchanger of the second indoor unit of the target adjustment number to operate as a condenser; Among them, the frost degree of the outdoor unit is negatively correlated with the target adjustment quantity of the second indoor unit.

8. A device for defrosting an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for defrosting an air conditioner according to any one of claims 1 to 7 when running the program instructions.

9. An air conditioner, characterized in that: include: Outdoor unit; A plurality of indoor units, each of which comprises a first heat exchanger and a second heat exchanger arranged in parallel; The device for defrosting an air conditioner as claimed in claim 8 is electrically connected to a plurality of indoor units respectively.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is used to execute the method for defrosting an air conditioner according to any one of claims 1 to 7.

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