Control method and device for defrosting, storage medium and air conditioner

Abstract

The application relates to the technical field of intelligent household appliances. A control method and device for defrosting, a storage medium and an air conditioner are disclosed. The method comprises the following steps: in the case that the defrosting mode is operated for a preset time length, the outlet temperatures T1, T2,..., Tn of n gas collector branch pipes are detected; n ; and the opening and closing of the opening and closing valve of the gas collector branch pipe is controlled according to the outlet temperatures T1, T2,..., Tn. n The application firstly sets temperature sensors and opening and closing valves at the end outlets of the branch pipes, so that whether the defrosting of the branch pipe is completed can be determined only according to the temperature at the end outlet. Then, the branch pipe whose defrosting is completed is disconnected, so that the high-temperature refrigerant enters other branch pipes whose defrosting is not completed. Compared with the related art, the opening and closing valves are not arranged for the plurality of branch pipes, the defrosting efficiency is improved, and the hardware facilities and complexity are reduced.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, such as a control method, device, storage medium, and air conditioner for defrosting. Background Technology

[0002] Currently, air-cooled air conditioning systems commonly use reverse circulation for defrosting. This means that during defrosting, high-temperature refrigerant is introduced into the outdoor heat exchanger through the manifold. However, in actual defrosting, due to uneven defrosting speeds across different circuits, some circuits may have completed defrosting while still allowing high-temperature refrigerant to enter, while other circuits may not have finished defrosting and therefore cannot receive more refrigerant. This imbalance in defrosting speed results in low overall defrosting efficiency.

[0003] In related technologies, a heat exchange device and its control method are disclosed. Each microchannel heat exchanger is equipped with a separate first controllable valve connected to a throttling device and a second controllable valve connected to the compressor outlet. Therefore, when defrosting using hot gas bypass, the flow rate of the high-temperature refrigerant discharged from the compressor into each microchannel heat exchanger can be independently controlled, facilitating the synchronization of defrosting across rows of microchannel heat exchangers and reducing heat waste.

[0004] However, this method requires multiple first and second controllable valves for multiple branches, resulting in complex hardware infrastructure. Furthermore, controlling the flow rate based on valve opening can lead to inconsistent valve openings for each branch, further increasing control complexity. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a control method, apparatus, storage medium, and air conditioner for defrosting, which improves defrosting efficiency while reducing hardware facilities and complexity.

[0007] In some embodiments, the defrosting control method includes: detecting the outlet temperatures T1, T2, ..., T of n gas collecting pipe branches when the defrosting mode has been running for a preset time. n According to T1, T2, ..., T n The valve controls the on / off state of the gas collecting pipe branch.

[0008] Optionally, the step of determining the time based on T1, T2, ..., T... n The on / off control of the valves in the gas collecting pipe branches includes: based on the temperature T of the i-th gas collecting pipe branch.i , which controls the on / off state of the valve of the i-th gas collecting pipe branch; where i = 1, 2, ..., n.

[0009] Optionally, the temperature T of the i-th gas collecting pipe branch is used as the basis for... i The control of the on / off valve of the i-th gas collecting pipe branch includes: in T i ≥T s In the case of control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected; among them, T s This represents the temperature threshold.

[0010] Optionally, the temperature T of the i-th gas collecting pipe branch is used as the basis for... i Controlling the on / off state of the valve of the i-th gas collecting pipe branch also includes: determining the temperature threshold T of the i-th gas collecting pipe branch according to the weight of the i-th gas collecting pipe branch. si According to T i With T si The relationship between T and the control valve of the i-th gas collecting pipe branch is used to control the on / off state of the valve; where T si Let be the temperature threshold of the i-th gas collecting pipe branch; i = 1, 2, ..., n.

[0011] Optionally, the temperature threshold T of the i-th gas collecting pipe branch is determined according to the weight of the i-th gas collecting pipe branch. si This includes: determining the weight of the i-th gas collecting pipe branch according to a preset relationship based on the flow path length of the i-th gas collecting pipe branch.

[0012] Optionally, the statement based on T i With T si The relationship between the control valves of the i-th gas collecting pipe branch and the control of their on / off states includes: [details about T]. i ≥T si In the case of control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected.

[0013] In some embodiments, the defrosting control device includes a processor and a memory storing program instructions, the processor being configured to execute a defrosting control method as described in any of the above embodiments when the program instructions are executed.

[0014] In some embodiments, the air conditioner includes a compressor and a defrosting system, and further includes:

[0015] Heat exchanger;

[0016] The gas collecting pipe is connected to the compressor exhaust port at one end and to the heat exchanger at the other end through n gas collecting pipe branches. It is configured to send high-temperature refrigerant into the heat exchanger in defrost mode. Each gas collecting pipe branch is equipped with a temperature sensor and an on / off valve at its end outlet, where n is an integer greater than or equal to 2.

[0017] Optionally, the air conditioner also includes:

[0018] The defrosting control device as described in the above embodiments.

[0019] The defrosting control method, apparatus, storage medium, and air conditioner provided in this disclosure can achieve the following technical effects:

[0020] This application first installs temperature sensors and on / off valves at the end outlet of each branch, allowing the determination of whether a branch has completed defrosting based solely on the temperature at the end outlet. Then, the defrosted branch is disconnected, allowing the high-temperature refrigerant to flow into other branches that have not yet been defrosted. Compared to related technologies, this eliminates the need for multiple opening valves for multiple branches, improving defrosting efficiency while reducing hardware requirements and complexity.

[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0023] Figure 1 This is a schematic diagram of a defrosting control method provided in an embodiment of this disclosure;

[0024] Figure 2 This is a schematic diagram of another defrosting control method provided in an embodiment of this disclosure;

[0025] Figure 3 This is a schematic diagram of another defrosting control method provided in an embodiment of this disclosure;

[0026] Figure 4 This is a schematic diagram of another defrosting control method provided in an embodiment of this disclosure;

[0027] Figure 5 This is a schematic diagram of the structure of a defrosting system provided in an embodiment of this disclosure;

[0028] Figure 6 This is a schematic diagram of a defrosting control device provided in an embodiment of this disclosure.

[0029] In the diagram: 500, gas collecting pipe 501, first on / off valve 502, second on / off valve 503, third on / off valve 504, first temperature sensor 505, second temperature sensor 506, third temperature sensor Detailed Implementation

[0030] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0031] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0032] Unless otherwise stated, the term "multiple" means two or more.

[0033] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0034] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0035] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0036] Currently, air-cooled air conditioning systems commonly use reverse circulation for defrosting. This involves introducing high-temperature refrigerant through the manifold into the outdoor heat exchanger during defrosting. However, in actual defrosting, uneven defrosting speeds across different branches can lead to situations where some branches have completed defrosting but still have high-temperature refrigerant entering, while others are not fully defrosted and cannot receive sufficient refrigerant. This imbalance in defrosting speed results in low overall defrosting efficiency. Related technologies suggest adjusting the refrigerant flow by adding multiple valves to each branch. However, this method involves setting multiple first and second controllable valves for multiple branches, resulting in complex hardware. Furthermore, controlling the flow rate based on valve opening can lead to inconsistent valve openings across different branches, further increasing control complexity.

[0037] Based on this, the present application provides a defrosting system, which firstly improves the structure, and then can determine the defrosting system based on the detected outlet temperatures T1, T2, ..., T of each gas collecting pipe branch. n The value is used to control the on / off valves of each gas collection pipe branch, thereby achieving uniform refrigerant flow in each branch, improving overall defrosting efficiency, and reducing hardware facilities and complexity.

[0038] Combination Figure 5The diagram shows a schematic of a defrosting system provided in this application. The defrosting system includes a heat exchanger (not shown) and a gas collection pipe 500. One end of the gas collection pipe 500 is connected to the compressor exhaust port, and the other end is connected to the heat exchanger through n gas collection pipe branches. The gas collection pipe 500 is configured to deliver high-temperature refrigerant to the heat exchanger in defrosting mode. Temperature sensors and on / off valves are installed at the end outlets of the n gas collection pipe branches, where n is an integer greater than or equal to 2. As shown, the on / off valves may include: a first on / off valve 501, a second on / off valve 502, a third on / off valve 503, a first temperature sensor 504, a second temperature sensor 505, and a third temperature sensor 506. The first on / off valve 501 and the first temperature sensor 504 are located in the first gas collection pipe branch; the second on / off valve 502 and the second temperature sensor 505 are located in the second gas collection pipe branch; and the third on / off valve 503 and the third temperature sensor 506 are located in the third gas collection pipe branch. Specifically, it's unnecessary to install temperature sensors and on / off valves on every gas manifold branch. Only branches with faster defrosting speeds need to be equipped. Compared to related technologies that use first and second controllable valves to control refrigerant flow across multiple branches, adding a valve to control flow is the first thing that comes to mind. However, this application has found through multiple practical tests that defrosting completion of a branch can be determined by changing the position of the on / off valve and detecting the temperature at the end of the gas manifold branch. Therefore, instead of simply adjusting the refrigerant flow of each branch by "adding valves and controlling their opening," this approach targets only certain branches, thereby improving defrosting efficiency while reducing hardware requirements and complexity.

[0039] It should be noted that, generally speaking, branches with faster defrosting speeds are those closer to the manifold. These branches have higher inlet pressures, larger refrigerant flow rates, and shorter flow paths. Therefore, they defrost faster, and temperature sensors and on / off valves can be installed on these branches to achieve the above configuration.

[0040] Optionally, the air conditioner in this defrosting system also includes a defrosting control device, the processor of which can implement a defrosting control method during execution. The following describes... Figure 1 This application provides an embodiment of a defrosting control method. The defrosting control method includes:

[0041] S101, when the processor has been running in defrost mode for a preset time, it detects the outlet temperatures T1, T2, ..., T of n gas collecting pipe branches. n .

[0042] S102, the processor, according to T1, T2, ..., T n The valve controls the on / off state of the gas collecting pipe branch.

[0043] In this embodiment, the air conditioner operates in defrost mode. Generally, after the four-way valve is energized and reversed for a preset duration, the outlet temperature of the n gas collection pipe branches is detected by a temperature sensor. Because the compressor undergoes a frequency increase process when the four-way valve is energized and reversed, it initially has virtually no defrosting capability. Specifically, based on practical experience, the preset duration can be 1 to 3 minutes. Furthermore, the processor controls the on / off state of the on / off valves of the n gas collection pipe branches based on their outlet temperatures. Compared to related technologies that use first and second controllable valves to control refrigerant flow for multiple branches, adding a valve to control the flow is the first thing that comes to mind. However, this application has found through multiple practices that the defrosting status of a branch can be determined by changing the position of the on / off valve and detecting the temperature at the end of the gas collection pipe branch. Therefore, instead of simply adjusting the refrigerant flow of each branch by "adding valves and controlling their opening," the defrosting status of some branches is determined by detecting the temperature at the end of the gas collection pipe branch. This improves defrosting efficiency while reducing hardware requirements and complexity.

[0044] Optionally, based on T1, T2, ..., T n The steps for controlling the on / off state of the valve in the gas collecting pipe branch specifically include: the processor controlling the on / off state of the valve in the i-th gas collecting pipe branch based on the temperature T. i The valve controls the on / off state of the i-th gas collecting pipe branch. Where i = 1, 2, ..., n.

[0045] In this embodiment, the processor detects the temperature T at the end outlet of a specific gas collection pipe branch i. i The on / off state of the valve in the i-th gas collecting pipe branch is controlled. This method allows for control based on the actual outlet temperature T of different gas collecting pipe branches. i It controls the on / off function of the valves in different branches, balances the refrigerant flow in each branch, and shortens the defrosting time.

[0046] like Figure 2 As shown, based on the temperature T of the i-th gas collecting pipe branch... i The specific steps for controlling the on / off state of the valve in the i-th gas collecting pipe branch include the processor adjusting the temperature T of the i-th gas collecting pipe branch according to the temperature T. i With temperature threshold T s The size relationship is used to control the on / off state of the on / off valve of the i-th gas collecting pipe branch.

[0047] Another method for defrosting control includes:

[0048] S201, when the processor runs in defrost mode for a preset time, it detects the outlet temperature of n gas collection pipe branches.

[0049] S202, the processor determines whether there is a T i ≥T s If yes, proceed to S2031; otherwise, proceed to S2032.

[0050] Among them, T s This represents the temperature threshold.

[0051] S2031, Processor Control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected.

[0052] S2032, the processor does not perform any processing.

[0053] In this embodiment, after detecting the outlet temperatures T1, T2, ..., T of n gas collecting pipe branches, n Then, it will be compared with the preset temperature threshold T. s Compare them. If it is T i ≥T s This indicates that the temperature at the end of the i-th branch has reached the defrosting requirement. Therefore, the processor controls the T... i The on / off valve of the corresponding gas manifold branch is disconnected, allowing the high-temperature refrigerant to flow into other branches. This method effectively controls the refrigerant flow in the affected branch, further improving its defrosting performance and reducing defrosting time. Furthermore, this method reduces hardware requirements and complexity.

[0054] Optionally, the temperature threshold T s The preferred value is 2℃ to 15℃. Since setting the temperature to 0℃ may lead to misjudgment due to temperature fluctuations, the minimum threshold is generally selected as 2℃ to ensure the reliability of the scheme implementation.

[0055] In this embodiment, besides setting the outlet temperatures of all n branches to a fixed temperature threshold T, s In addition to the comparison scheme, another method is provided to determine the temperature threshold T based on the weight of the i-th gas collecting pipe branch. si The scheme. Among them, T... si This is the temperature threshold for the i-th gas collecting pipe branch, meaning a different temperature threshold is set for each of the n branches. In fact, at the temperature threshold T... s Without a precise fixed value, the actual defrosting effect of each branch may vary due to differences in the distance between each branch and the gas collecting pipe, as well as differences in the flow path length of each branch. In such cases, using the same specific temperature threshold T... sControlling the on / off state of the valves in each branch can easily lead to uneven refrigerant distribution and excessively long defrosting times. However, this embodiment determines the temperature threshold T of the i-th gas collecting pipe branch based on its weight. si Then compare T i With T si It also controls the on / off state of the shut-off valve. This improves the uniformity of refrigerant distribution and shortens the overall defrosting time. Figure 3 As shown, another method for controlling defrosting is provided, including:

[0056] S301, when the processor runs in defrost mode for a preset time, it detects the outlet temperature of n gas collection pipe branches.

[0057] S302, the processor determines the temperature threshold T of the i-th gas collecting pipe branch based on the weight of the i-th gas collecting pipe branch. si .

[0058] S303, the processor according to T i With T si The relationship between the control valve and the on / off valve of the i-th gas collecting pipe branch is used to control the on / off state of the gas collecting pipe branch.

[0059] Among them, T si Let be the temperature threshold of the i-th gas collecting pipe branch; i = 1, 2, ..., n.

[0060] In this embodiment, the weight of the aforementioned gas collecting pipe branch can be the flow path length of the gas collecting pipe branch, the distance from the gas collecting pipe, or the defrosting speed during the actual defrosting process, thereby setting different temperature thresholds T for each branch. si Then, based on T i With T si The size of the valve controls its on / off state, thereby improving refrigerant distribution uniformity and shortening the overall defrosting time.

[0061] Similarly, combining Figure 4 For the above temperature threshold T s If the actual conditions of each gas collecting pipe branch i are not matched, the temperature threshold T of the i-th gas collecting pipe branch is determined according to the weight of the i-th gas collecting pipe branch. si The plan will be explained. For example... Figure 4 As shown in the embodiments of this disclosure, another control method for defrosting includes:

[0062] S401, when the processor runs in defrost mode for a preset time, it detects the outlet temperature of n gas collection pipe branches.

[0063] S402, determine the temperature threshold T of the i-th gas collecting pipe branch according to its weight.si .

[0064] S403, the processor determines if there is a T i ≥T si If yes, proceed to S4041; otherwise, proceed to S4042.

[0065] S4041, Processor Control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected.

[0066] S4042, in T i <T si In this case, the processor does not process the on / off valve.

[0067] In this embodiment, the processor first obtains the terminal outlet temperatures of n gas collecting pipe branches. Then, based on the weights of different gas collecting pipe branches, it determines the temperature threshold T for each branch. si When the outlet temperature of branch i is lower than the temperature threshold of that branch, the on / off valve remains unchanged; when the outlet temperature is higher than the temperature threshold, the processor controls the on / off valve to open, thus better adapting to the temperature threshold T. s The situation where it does not match the actual situation of each gas collection pipe branch.

[0068] The weight of the aforementioned gas collecting pipe branch can be the flow path length of the gas collecting pipe branch, the distance from the gas collecting pipe, or the defrosting speed during the actual defrosting process, thereby setting different temperature thresholds T for each branch. si Then compare T i With T si This controls the on / off state of the valves, thereby improving refrigerant distribution uniformity and shortening the overall defrosting time. For example, a longer branch may defrost more slowly than a shorter branch. Therefore, branches with longer flow paths are given a higher weight, resulting in a higher temperature threshold T for that branch. si The temperature threshold is slightly higher than that of the shorter branches. For example, the temperature threshold for the longer branches is set to 2℃, and the temperature threshold for the shorter branches is set to 1.5℃. This way, once the shorter branches reach the temperature threshold, the refrigerant flow stops and then flows into the other branches.

[0069] Combination Figure 6As shown, this disclosure provides a defrosting control device, including a processor 600 and a memory 601. Optionally, the device may further include a communication interface 602 and a bus 603. The processor 600, communication interface 602, and memory 601 can communicate with each other via the bus 603. The communication interface 602 can be used for information transmission. The processor 600 can call logical instructions in the memory 601 to execute the defrosting control method of the above embodiment.

[0070] Furthermore, the logic instructions in the aforementioned memory 601 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0071] The memory 601, as a storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 600 executes functional applications and data processing by running the program instructions / modules stored in the memory 601, thereby implementing the defrosting control method in the above embodiments.

[0072] The memory 601 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 601 may include high-speed random access memory and may also include non-volatile memory.

[0073] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0074] Those skilled in the art will recognize that the units and algorithm steps of the various examples 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 implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0075] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A defrosting control method, applied to an air conditioner, characterized in that, The air conditioner includes a compressor and a defrosting system. The defrosting system includes a heat exchanger and a gas collection pipe, one end of which is connected to the compressor exhaust port, and the other end is connected to the heat exchanger through n gas collection pipe branches. It is configured to send high-temperature refrigerant into the heat exchanger in defrosting mode. Temperature sensors and on / off valves are installed at the end outlets of some branches of the gas collection pipe, where n is an integer greater than or equal to 2. The method includes: After running in defrost mode for a preset time, the outlet temperatures T1, T2, ..., T of n gas collecting pipe branches are measured. n ; Based on T1, T2, ..., T n Controls the on / off state of the valves in the gas collecting pipe branch; Among them, according to T1, T2, ..., T n The on / off control of the valves in the gas collecting pipe branch includes: based on the temperature T of the i-th gas collecting pipe branch. i The valve controls the on / off state of the i-th gas collecting pipe branch; where i = 1, 2, ..., n; Based on the temperature T of the i-th gas collecting pipe branch i Controlling the on / off state of the valve for the i-th gas collecting pipe branch includes: determining the weight of the i-th gas collecting pipe branch according to a preset relationship based on the flow path length of the i-th gas collecting pipe branch; and determining the temperature threshold T of the i-th gas collecting pipe branch based on the weight of the i-th gas collecting pipe branch. si According to T i With T si The relationship between T and the control valve of the i-th gas collecting pipe branch is used to control the on / off state of the valve; where T si is the temperature threshold of the i-th gas collecting pipe branch.

2. The method according to claim 1, characterized in that, The temperature T of the i-th gas collecting pipe branch is used as a reference. i The control of the on / off valve of the i-th gas collecting pipe branch also includes: In T i ≥T s In the case of control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected; Among them, T s This represents the temperature threshold.

3. The method according to claim 1, characterized in that, According to T i With T si The relationship between the control valves of the i-th gas collecting pipe branch and the control of their on / off states includes: In T i ≥T si In the case of control and T i The on / off valve of the corresponding gas collecting pipe branch is disconnected.

4. A control device for defrosting, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute, when running the program instructions, the control method for defrosting as described in any one of claims 1 to 3.

5. An air conditioner, comprising a compressor and a defrosting system, characterized in that, The defrosting system includes: Heat exchanger; The gas collecting pipe is connected to the compressor exhaust port at one end and to the heat exchanger at the other end through n gas collecting pipe branches. It is configured to send high-temperature refrigerant into the heat exchanger in defrost mode. Temperature sensors and on / off valves are installed at the end outlets of some branches of the gas collecting pipe, where n is an integer greater than or equal to 2. The defrosting control device as described in claim 4.

6. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the defrosting control method as described in any one of claims 1 to 3.

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