Defrosting control method of air conditioning unit and defrosting system of air conditioning unit

Abstract

The application discloses a defrosting control method of an air conditioning unit and a defrosting system of the air conditioning unit. The method comprises the following steps: obtaining a defrosting request; in response to the defrosting request, arranging a first sub-group of air conditioners to the last position of an initial defrosting air conditioner queue of the air conditioning unit to obtain a current defrosting air conditioner queue; determining a current defrosting air conditioner number of the air conditioning unit; if the current defrosting air conditioner number is less than a maximum defrosting air conditioner number of the air conditioning unit, determining a number of new defrosting air conditioners that can be added to the air conditioning unit; selecting a second sub-group of air conditioners from the current defrosting air conditioner queue according to the number of new defrosting air conditioners that can be added; and sending a defrosting instruction to the second sub-group of air conditioners to switch the second sub-group of air conditioners from a non-defrosting state to a defrosting state. The method realizes the screening and control of new defrosting air conditioners to defrost according to the current defrosting air conditioner number and the maximum defrosting air conditioner number of the air conditioning unit during the operation of the air conditioning unit, and improves the operation energy efficiency of the air conditioning unit.

Description

Technical Field

[0001] This application belongs to the field of air conditioning defrosting technology, and particularly relates to a defrosting control method and defrosting system for air conditioning units. Background Technology

[0002] The air conditioning unit adopts a modular design, consisting of multiple air conditioners combined. During the heating operation, the outdoor unit of the air conditioning unit may frost up. Frost on the outdoor unit can greatly affect the heating effect of the air conditioning unit, so it is necessary to defrost the outdoor unit.

[0003] Currently, during the operation of air conditioning units, a certain number of air conditioners are defrosted according to their serial numbers. However, when the outdoor ambient temperature is too low and the humidity is high, the air conditioners with smaller serial numbers frequently require defrosting, while the air conditioners with larger serial numbers cannot defrost in time for a considerable period of time. This reduces the heating capacity of the air conditioners with larger serial numbers, resulting in lower operating energy efficiency of the air conditioning unit. Summary of the Invention

[0004] In view of the above, this application provides a defrosting control method and a defrosting system for an air conditioning unit to overcome the problems of the prior art.

[0005] In a first aspect, embodiments of this application provide a defrosting control method for an air conditioning unit, including:

[0006] Obtain a defrost request, the defrost request being used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted;

[0007] In response to the defrosting request, the first subgroup of air conditioners is placed at the end of the initial defrosting queue of the air conditioning unit to obtain the current defrosting queue. The initial defrosting queue is arranged in descending order of the defrosting waiting time of the air conditioners.

[0008] Determine the number of air conditioners currently defrosting in the air conditioning unit;

[0009] If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit.

[0010] Based on the number of air conditioners that can be added for defrosting, a second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted. The second subgroup of air conditioners consists of the top N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting.

[0011] Send a defrost command to the second subgroup of air conditioners to switch the second subgroup of air conditioners from non-defrost state to defrost state.

[0012] The solution provided in this application, during the operation of the air conditioning unit, selects new air conditioners to be defrosted from the current queue of air conditioners to be defrosted based on the current number of air conditioners to be defrosted and the maximum number of air conditioners to be defrosted, and controls the new air conditioners to be defrosted. Since the current queue of air conditioners to be defrosted is sorted in descending order of defrosting waiting time, it can suppress the problem that air conditioners with larger unit numbers cannot be defrosted in time for a long time when the air conditioning unit defrosts in order of unit number, thereby improving the operating energy efficiency of the air conditioning unit.

[0013] In some optional embodiments, the step of selecting a second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting includes:

[0014] Determine the number of air conditioners in the current defrost queue;

[0015] Based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting, the second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted.

[0016] The solution provided in this embodiment selects the second subgroup of air conditioners based on the number of air conditioners waiting to be defrosted in the current defrost queue and the number of air conditioners that can be added for defrosting. Since the current defrost queue of air conditioners is sorted in descending order of defrost waiting time, air conditioners with longer defrost waiting times can be selected first, which is beneficial to improving the operating energy efficiency of the air conditioning unit.

[0017] In some optional embodiments, the step of selecting the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting includes:

[0018] When the number of air conditioners to be defrosted is greater than or equal to the number of air conditioners that can be added for defrosting, the number of air conditioners to be defrosted that can be added for defrosting is selected from the first position of the current air conditioner queue to obtain the second subgroup of air conditioners.

[0019] When the number of air conditioners to be defrosted is less than the number of air conditioners that can be added for defrosting, all air conditioners to be defrosted corresponding to the current air conditioner queue are identified as the second subgroup of air conditioners.

[0020] The solution provided in this embodiment selects the air conditioner with the longest defrosting waiting time from the current defrosting queue to obtain the second subgroup of air conditioners. This ensures that the air conditioner with the longest defrosting waiting time is defrosted first, which is beneficial to improving the operating energy efficiency of the air conditioning unit.

[0021] In some optional embodiments, the first subgroup of air conditioners includes multiple air conditioners. The step of arranging the first subgroup of air conditioners to the end of the initial defrost queue of the air conditioning unit in response to the defrost request, to obtain the current defrost queue, includes:

[0022] In response to the defrost request, determine the arrangement order of the multiple air conditioners;

[0023] According to the arrangement order, the multiple air conditioners are arranged to the end of the initial air conditioner queue to be defrosted, thus obtaining the current air conditioner queue to be defrosted.

[0024] The solution provided in this embodiment arranges the first subgroup of air conditioners at the end of the initial queue of air conditioners to be defrosted. This allows the current queue of air conditioners to be defrosted to be arranged in descending order of defrosting waiting time, so that the air conditioner with the longest defrosting waiting time is selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0025] In some optional embodiments, determining the arrangement order of the multiple air conditioners in response to the defrost request includes:

[0026] In response to the defrosting request, it is determined whether the liquid-side temperature of the outdoor heat exchangers of the multiple air conditioners is the same;

[0027] When it is determined that the liquid-side temperatures of the outdoor heat exchangers of the multiple air conditioners are different, the order in which the multiple air conditioners are arranged according to their liquid-side temperatures from smallest to largest is determined as the arrangement order.

[0028] The solution provided in this embodiment is that the lower the liquid side temperature of the outdoor heat exchanger of the air conditioner, the easier it is for the air conditioner to frost, and the higher the air conditioner defrost requirement. By sorting the air conditioners according to the liquid side temperature of the outdoor heat exchanger from small to large, it can be ensured that the air conditioners with high defrost requirements are selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0029] In some optional embodiments, determining the arrangement order of the multiple air conditioners in response to the defrost request further includes:

[0030] When it is determined that the liquid side temperature of the outdoor heat exchangers of the multiple air conditioners is the same, it is determined whether the discharge pressure of the compressors of the multiple air conditioners is the same.

[0031] When it is determined that the compressor discharge pressures of the multiple air conditioners are different, the arrangement order is determined by arranging the multiple air conditioners in ascending order of compressor discharge pressure.

[0032] In the solution provided in this embodiment, when the liquid side temperature of the outdoor heat exchanger of the air conditioner is the same, the lower the discharge pressure of the air conditioner compressor, the easier it is for the air conditioner to frost, and the higher the air conditioner defrost requirement. By sorting the air conditioners according to the order of compressor discharge pressure from small to large, it can be ensured that the air conditioners with high defrost requirements are selected first, which is conducive to improving the selection accuracy of the second subgroup of air conditioners.

[0033] In some optional embodiments, determining the arrangement order of the multiple air conditioners in response to the defrost request further includes:

[0034] When it is determined that the compressor discharge pressure of the multiple air conditioners is the same, it is determined whether the defrosting interval of the multiple air conditioners is the same.

[0035] When it is determined that the defrosting intervals of the multiple air conditioners are different, the order in which the multiple air conditioners are arranged from largest to smallest according to the defrosting interval is determined as the arrangement order;

[0036] When it is determined that the defrosting intervals of the multiple air conditioners are the same, the order in which the multiple air conditioners are arranged in ascending order according to the preset air conditioner serial number is determined as the arrangement order.

[0037] In the solution provided in this embodiment, when the liquid side temperature of the outdoor heat exchanger of the air conditioner and the discharge pressure of the compressor are the same, the longer the defrost interval, the easier it is for the air conditioner to frost, and the higher the defrost requirement of the air conditioner. By sorting the air conditioners in descending order of their defrost interval, it can be ensured that the air conditioners with high defrost requirements are selected first, which is conducive to improving the selection accuracy of the second subgroup of air conditioners.

[0038] In some optional embodiments, sending the defrost command to the second subgroup of air conditioners includes:

[0039] When the interval between sending the previous defrost command reaches a preset interval, the defrost command is sent to the second subgroup of air conditioners.

[0040] The solution provided in this embodiment controls the newly added defrosting air conditioner of the air conditioning unit to defrost according to a preset interval. This avoids the sudden drop in the heating capacity of the air conditioning unit caused by real-time defrosting of the newly added defrosting air conditioner, which would result in large fluctuations in the indoor temperature heated by the air conditioning unit. This is beneficial to improving the stability of the indoor temperature heated by the air conditioning unit.

[0041] In some optional embodiments, before obtaining the defrost request, the defrost control method further includes:

[0042] Determine the frosting status of the air conditioning unit;

[0043] The maximum number of defrosting air conditioners and the preset interval time are adjusted according to the frosting state.

[0044] The solution provided in this embodiment adjusts the number of air conditioners to defrost and the defrosting interval according to the frosting status of the air conditioning unit, which can ensure that the air conditioning unit meets the heating demand while having high operating energy efficiency.

[0045] Secondly, embodiments of this application provide a defrosting control device for an air conditioning unit, comprising:

[0046] The acquisition module is used to acquire a defrost request, wherein the defrost request is used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted;

[0047] The sorting module is used to respond to the defrosting request by arranging the first subgroup of air conditioners to the end of the initial defrosting queue of the air conditioning unit to obtain the current defrosting queue. The initial defrosting queue is arranged in descending order of the defrosting waiting time of the air conditioners.

[0048] The first determining module is used to determine the number of air conditioners currently defrosting in the air conditioning unit;

[0049] The second determining module is used to determine the number of new defrosting air conditioners that can be added to the air conditioning unit when the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners of the air conditioning unit.

[0050] The filtering module is used to filter out a second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting. The second subgroup of air conditioners is the first N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting.

[0051] The sending module is used to send a defrost command to the second subgroup of air conditioners, so that the second subgroup of air conditioners switches from the non-defrost state to the defrost state.

[0052] Thirdly, embodiments of this application provide a defrosting control system for an air conditioning unit, including an air conditioning unit and a controller, wherein the air conditioning unit is connected to the controller;

[0053] The controller is configured to:

[0054] Obtain a defrost request, the defrost request being used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted;

[0055] In response to the defrosting request, the first subgroup of air conditioners is placed at the end of the initial defrosting queue of the air conditioning unit to obtain the current defrosting queue. The initial defrosting queue is arranged in descending order of the defrosting waiting time of the air conditioners.

[0056] Determine the number of air conditioners currently defrosting in the air conditioning unit;

[0057] If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit.

[0058] Based on the number of air conditioners that can be added for defrosting, a second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted. The second subgroup of air conditioners consists of the top N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting.

[0059] Send a defrost command to the second subgroup of air conditioners to switch the second subgroup of air conditioners from non-defrost state to defrost state.

[0060] Fourthly, embodiments of this application provide a computer-readable storage medium storing program code, which can be invoked by a processor to execute the defrosting control method for an air conditioning unit as described in the first aspect above.

[0061] Fifthly, embodiments of this application provide a computer program product that, when run on a computer device, causes the computer device to execute the defrosting control method for an air conditioning unit as described in the first aspect above.

[0062] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0063] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This illustration shows a scenario diagram of a defrosting system for an air conditioning unit provided in an embodiment of this application.

[0065] Figure 2 A schematic flowchart of a defrosting control method for an air conditioning unit provided in an embodiment of this application is shown.

[0066] Figure 3 This illustration shows a scenario flowchart of the method for determining the arrangement order of multiple air conditioners in the defrosting control method for air conditioning units provided in an embodiment of this application.

[0067] Figure 4 This illustration shows a scenario flow diagram of the defrosting control method for an air conditioning unit provided in an embodiment of this application.

[0068] Figure 5 This paper illustrates another flowchart of the defrosting control method for an air conditioning unit provided in an embodiment of this application.

[0069] Figure 6 A structural block diagram of a defrosting control device for an air conditioning unit provided in an embodiment of this application is shown.

[0070] Figure 7 This application illustrates a computer-readable storage medium for storing or carrying program code that implements the defrosting control method for an air conditioning unit according to an embodiment of this application.

[0071] Figure 8 This application illustrates a computer program product for storing or carrying program code that implements the defrosting control method for an air conditioning unit according to an embodiment of this application. Detailed Implementation

[0072] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0073] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0074] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0075] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0076] Furthermore, in the description of this application, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0077] The air conditioning unit adopts a modular design, consisting of multiple air conditioners combined. During the heating operation, the outdoor unit of the air conditioning unit may frost up. Frost on the outdoor unit can greatly affect the heating effect of the air conditioning unit, so it is necessary to defrost the outdoor unit.

[0078] Currently, during the operation of air conditioning units, a certain number of air conditioners are defrosted according to their serial numbers. However, when the outdoor ambient temperature is too low and the humidity is high, the air conditioners with smaller serial numbers frequently require defrosting, while the air conditioners with larger serial numbers cannot defrost in time for a considerable period of time. This reduces the heating capacity of the air conditioners with larger serial numbers, resulting in lower operating energy efficiency of the air conditioning unit.

[0079] To address the aforementioned issues, the defrosting control method and defrosting system for air conditioning units provided in this application obtain a defrosting request, which instructs the first subgroup of air conditioners in the air conditioning unit to be defrosted. In response to the defrosting request, the first subgroup of air conditioners is moved to the end of the initial queue of air conditioners to be defrosted, thus obtaining the current queue of air conditioners to be defrosted. The initial queue of air conditioners to be defrosted is arranged in descending order of their defrosting waiting time. The current number of air conditioners to be defrosted in the air conditioning unit is determined. If the current number of air conditioners to be defrosted is less than the maximum number of air conditioners to be defrosted in the air conditioning unit, the number of air conditioners that can be added to the air conditioning unit is determined, and a second subgroup is selected from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added to the air conditioning unit. The air conditioning system identifies the first N air conditioners in the current defrost queue, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting. It also sends defrost commands to the second subgroup of air conditioners to switch them from non-defrost to defrost mode. This system allows for the selection of new air conditioners for defrosting from the current queue based on the current and maximum number of air conditioners that can be defrosted during operation. Since the queue is ordered from longest to shortest defrost waiting time, it mitigates the problem of air conditioners with higher unit numbers failing to defrost in time when defrosting is performed sequentially by unit number, thus improving the operating efficiency of the air conditioning unit.

[0080] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0081] Please see Figure 1 The illustration shows an application scenario diagram of the defrosting system of the air conditioning unit provided in the embodiment of this application. The defrosting system of the air conditioning unit may include the air conditioning unit 100 and the control device 200. The air conditioning unit 100 is communicatively connected to the control device 200 and interacts with the control device 200 for data.

[0082] The air conditioning unit 100 may include multiple air conditioners, which may be any of the following: air source heat pump air conditioner, water source heat pump air conditioner, or ground source heat pump air conditioner, etc., without any limitation here.

[0083] The control device 200 can be any type of server or terminal device, etc., without limitation, and can be set according to actual needs.

[0084] A server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDN), big data, and artificial intelligence platforms.

[0085] Terminal devices can be mobile terminal devices (e.g., in-vehicle terminals, PDAs, tablet PCs, laptops, etc.) or fixed terminal devices (desktop computers, smart panels, etc.).

[0086] Please see Figure 2 This document illustrates a flowchart of a defrosting control method for an air conditioning unit according to an embodiment of this application. In a specific embodiment, the defrosting control method for the air conditioning unit can be applied to, for example... Figure 1 The control device 200 in the defrosting system of the air conditioning unit shown below will be used as an example to explain... Figure 2 The process shown is described in detail. The defrosting control method for air conditioning units may include the following steps 101 to 106.

[0087] Step 101: Obtain a defrost request.

[0088] In this embodiment, the first subgroup of air conditioners may include at least one air conditioner. When the first subgroup of air conditioners needs defrosting, the control device can obtain a defrosting request.

[0089] The defrost request can instruct the control equipment to control the first subgroup of air conditioners in the air conditioning unit to defrost.

[0090] In some implementations, when the first subgroup of air conditioners needs to defrost, the first subgroup of air conditioners can send a defrost request to the control device, and the control device receives the defrost request sent by the first subgroup of air conditioners.

[0091] In some implementations, when the first subgroup of air conditioners needs defrosting, the user can input a defrosting request carrying the identifier of the first subgroup of air conditioners into the control device via the input panel of the control device, and the control device will receive the defrosting request input by the user.

[0092] In some implementations, the defrosting system of the air conditioning unit may also include a client that is connected to the control device via a network and interacts with the control device via the network.

[0093] When the first subgroup of air conditioners needs defrosting, the user can send a defrosting request carrying the identifier of the first subgroup of air conditioners to the client. The client receives and responds to the defrosting request, and forwards the defrosting request to the control device via the network. The control device receives the defrosting request forwarded by the client.

[0094] The client can be any of the following: a mobile client (e.g., a mobile phone client, a PDA client, a Tablet PC client, a laptop client, a smartwatch client, a smart bracelet client, or a wearable client) or a fixed client (e.g., a desktop computer client, a smart panel client). The type of client is not limited here and can be set according to actual needs.

[0095] The network can be either a wired network or a wireless network, etc., without any limitation.

[0096] Step 102: In response to the defrost request, the first subgroup of air conditioners is placed at the end of the initial defrost queue of the air conditioning unit to obtain the current defrost queue.

[0097] In this embodiment of the application, after the control device obtains the defrost request, it can respond to the defrost request by arranging the first subgroup of air conditioners to the end of the initial defrost queue of the air conditioning unit, thereby obtaining the current defrost queue of air conditioners.

[0098] The initial queue of air conditioners awaiting defrosting can be arranged in descending order of their defrosting waiting time. The first subgroup of air conditioners is then moved to the end of the initial queue, resulting in the current queue, which is also arranged in descending order of defrosting waiting time.

[0099] In some implementations, the first subgroup of air conditioners may include multiple air conditioners. After receiving a defrost request, the control device can, in response to the defrost request, determine the arrangement order of the multiple air conditioners, and arrange the multiple air conditioners to the end of the initial queue of air conditioners to be defrosted, thus obtaining the current queue of air conditioners to be defrosted. Arranging the first subgroup of air conditioners to the end of the initial queue of air conditioners to be defrosted allows the current queue of air conditioners to be defrosted to be arranged in descending order of defrost waiting time, so that the air conditioner with the longest defrost waiting time is selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0100] The order in which multiple air conditioners are arranged can be determined based on at least one of the following: the liquid side temperature of the outdoor heat exchanger of the multiple air conditioners, the compressor discharge pressure, the defrost interval, and the preset air conditioner serial number. No restrictions are imposed here.

[0101] In one implementation, the control device can respond to a defrost request by determining whether the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are the same. When it is determined that the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are different, the control device can determine the order of the multiple air conditioners according to the order of their liquid-side temperatures from lowest to highest. The lower the liquid-side temperature of the outdoor heat exchanger of an air conditioner, the easier it is for the air conditioner to frost, and the higher the defrost requirement. Sort the air conditioners according to the order of their liquid-side temperatures from lowest to highest to ensure that air conditioners with high defrost requirements are selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0102] In one implementation, the control device can respond to a defrost request by determining whether the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are the same. If the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are the same, the control device can determine whether the compressor discharge pressures of multiple air conditioners are the same. If the compressor discharge pressures of multiple air conditioners are different, the control device can determine the order of the multiple air conditioners by arranging them in ascending order of compressor discharge pressure. When the liquid-side temperatures of the outdoor heat exchangers of the air conditioners are the same, the lower the compressor discharge pressure of the air conditioner, the easier it is for the air conditioner to frost, and the higher the defrost requirement. Sort the air conditioners in ascending order of compressor discharge pressure to ensure that air conditioners with high defrost requirements are selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0103] In one implementation, the control device can respond to a defrost request by determining whether the liquid-side temperature of the outdoor heat exchangers of multiple air conditioners is the same. When the liquid-side temperature of the outdoor heat exchangers of multiple air conditioners is determined to be the same, the control device can determine whether the discharge pressure of the compressors of multiple air conditioners is the same. When the discharge pressure of the compressors of multiple air conditioners is determined to be the same, the control device can determine whether the defrost interval of multiple air conditioners is the same. When the defrost interval of multiple air conditioners is determined to be different, the control device can determine the order of the multiple air conditioners according to the order of the defrost interval from longest to shortest. When the liquid-side temperature of the outdoor heat exchanger and the discharge pressure of the compressor are the same, the longer the defrost interval, the easier it is for the air conditioner to frost, and the higher the defrost requirement. Sort the air conditioners according to the order of the defrost interval from longest to shortest to ensure that the air conditioners with high defrost requirements are selected first, which helps to improve the selection accuracy of the second subgroup of air conditioners.

[0104] In one implementation, the control device can respond to a defrost request by determining whether the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are the same. When the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are determined to be the same, the control device can determine whether the compressor discharge pressures of multiple air conditioners are the same. When the compressor discharge pressures of multiple air conditioners are determined to be the same, the control device can determine whether the defrost intervals of multiple air conditioners are the same. When the defrost intervals of multiple air conditioners are determined to be the same, the control device can determine the arrangement order of multiple air conditioners according to a preset air conditioner serial number from smallest to largest. When the liquid-side temperature of the outdoor heat exchanger, the compressor discharge pressure, and the defrost interval are all the same, the air conditioners are sorted according to their serial numbers so that the air conditioning units defrost according to the set serial number order, which helps to improve the user experience during the defrosting process of the air conditioning units.

[0105] In one application scenario, such as Figure 3 As shown, the method for determining the arrangement order of multiple air conditioners may include the following steps 201 to 207.

[0106] Step 201: Determine whether the liquid side temperature (Te) of the outdoor heat exchangers of multiple air conditioners is the same.

[0107] When it is determined that the Te values ​​of multiple air conditioners are different, proceed to step 202;

[0108] When it is determined that the Te values ​​of multiple air conditioners are the same, proceed to step 203.

[0109] Step 202: Determine the arrangement order of the multiple air conditioners by arranging them in ascending order of Te.

[0110] Step 203: Determine whether the compressor discharge pressure (Pd) of multiple air conditioners is the same.

[0111] When it is determined that the Pd values ​​of multiple air conditioners are different, proceed to step 204.

[0112] If it is determined that the Pd values ​​of multiple air conditioners are the same, proceed to step 205.

[0113] Step 204: Determine the arrangement order of the multiple air conditioners by arranging them in ascending order of Pd.

[0114] Step 205: Determine whether the defrosting interval (Ti) of multiple air conditioners is the same.

[0115] When it is determined that the Ti values ​​of multiple air conditioners are different, proceed to step 206;

[0116] When it is determined that the Ti values ​​of multiple air conditioners are the same, proceed to step 207.

[0117] Step 206: Determine the arrangement order by arranging multiple air conditioners in descending order of Ti.

[0118] Step 207: Determine the arrangement order by arranging multiple air conditioners in ascending order of their preset serial numbers.

[0119] Step 103: Determine the number of air conditioners currently defrosting in the air conditioning unit.

[0120] In this embodiment of the application, the control device responds to the defrosting request by arranging the first subgroup of air conditioners to the end of the initial defrosting queue of the air conditioning unit. After obtaining the current defrosting queue, the control device can obtain the air conditioner status of each air conditioner in the air conditioning unit and determine the number of air conditioners that can be defrosted in the unit based on the air conditioner status of each air conditioner in the air conditioning unit.

[0121] The air conditioning status can include defrosting status or non-defrosting status, and the control equipment can determine the number of air conditioners in the air conditioning unit that are in defrosting status as the current number of defrosting air conditioners.

[0122] The control equipment can acquire the operating parameters of each air conditioner in the air conditioning unit and determine the air conditioning status of each air conditioner based on the operating parameters.

[0123] When the operating parameters are within the preset range, the corresponding air conditioner is determined to be in defrost mode; when the operating parameters are outside the preset range, the corresponding air conditioner is determined to be in non-defrost mode.

[0124] The preset parameter range can be used to characterize the operating parameter range of the corresponding air conditioner when it is in defrost mode. The preset parameter range can be the operating parameter range set by the user in advance, or it can be the operating parameter range automatically generated by the control device based on the process of defrosting the air conditioning unit multiple times, etc. There is no limitation here.

[0125] Operating parameters may include at least one of operating current, operating voltage, and operating power, etc., without limitation here.

[0126] Step 104: If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners for the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit.

[0127] In this embodiment of the application, after the control device determines the current number of defrosting air conditioners in the air conditioning unit, if the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, the difference between the maximum number of defrosting air conditioners and the current number of defrosting air conditioners can be calculated to obtain the number of new defrosting air conditioners that can be added to the air conditioning unit.

[0128] Among them, the maximum number of defrosting air conditioners can be used to characterize the maximum defrosting load capacity of the air conditioning unit, and the number of additional defrosting air conditioners can be used to characterize the additional defrosting load capacity of the air conditioning unit.

[0129] Step 105: Select the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting.

[0130] In this embodiment of the application, if the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, after the control device determines the number of air conditioners that can be added to the air conditioning unit, it can select the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added to the defrosting unit.

[0131] The second subgroup of air conditioners may include at least one air conditioner, which is in a non-defrosting state. The second subgroup of air conditioners may be the first N air conditioners in the current defrosting queue, where N may be greater than or equal to 1 and is related to the number of new air conditioners that can be added for defrosting.

[0132] Specifically, if the current number of air conditioners requiring defrosting is less than the maximum number of air conditioners that can be defrosted by the air conditioning unit, the control equipment can determine the number of air conditioners that can be added to the air conditioning unit after determining the number of air conditioners that need to be defrosted in the current queue. Based on the number of air conditioners that need to be defrosted and the number of air conditioners that can be added, the control equipment can select the second subgroup of air conditioners from the current queue of air conditioners that need to be defrosted. Since the current queue of air conditioners that need to be defrosted is sorted in descending order of defrosting waiting time, air conditioners with longer defrosting waiting times can be selected first, which is beneficial to improving the operating energy efficiency of the air conditioning unit.

[0133] Regarding the process by which the control device determines the number of air conditioners to be defrosted in the current defrost queue, in some embodiments, the control device can count the current defrost queue to obtain the number of air conditioners to be defrosted.

[0134] Regarding the process by which the control device determines the number of air conditioners in the current defrost queue, in some embodiments, the control device may generate a prompt message and receive the number of air conditioners in the current defrost queue uploaded by the user based on the prompt message.

[0135] The prompt message can be used to prompt the user to upload the number of air conditioners in the current defrost queue to the control device. The prompt message can be at least one of the following: text prompt message, sound prompt message, or light prompt message, etc., without limitation.

[0136] Regarding the process by which the control device selects the second subgroup of air conditioners from the current queue of air conditioners awaiting defrosting based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting, in some embodiments, when the number of air conditioners to be defrosted is greater than or equal to the number of air conditioners that can be added for defrosting, the control device can select the number of air conditioners to be defrosted starting from the first position in the current queue, thus obtaining the second subgroup of air conditioners. Alternatively, when the number of air conditioners to be defrosted is less than the number of air conditioners that can be added for defrosting, the control device can determine all air conditioners to be defrosted corresponding to the current queue as the second subgroup of air conditioners. Selecting the air conditioner with the longest defrosting waiting time from the current queue to obtain the second subgroup of air conditioners ensures that the air conditioner with the longest defrosting waiting time is defrosted first, which is beneficial to improving the operating energy efficiency of the air conditioning unit.

[0137] Step 106: Send a defrost command to the second subgroup air conditioner to switch the second subgroup air conditioner from non-defrost state to defrost state.

[0138] In this embodiment, after the control device selects the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of new defrosting air conditioners that can be added, it can send a defrosting command to the second subgroup of air conditioners. The second subgroup of air conditioners receives and responds to the defrosting command, switching from the non-defrosting state to the defrosting state. This realizes that during the operation of the air conditioning unit, based on the current number of air conditioners to be defrosted and the maximum number of air conditioners to be defrosted, the new air conditioners to be defrosted are selected from the current queue of air conditioners to be defrosted, and the new air conditioners to be defrosted are controlled to perform defrosting. Since the current queue of air conditioners to be defrosted is sorted in descending order of defrosting waiting time, the problem of air conditioners with larger unit numbers not being able to defrost in time for a long time when the air conditioning unit defrosts in order of unit number can be suppressed, thereby improving the operating energy efficiency of the air conditioning unit.

[0139] In some implementations, after the control device selects the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting, it can send a defrosting command to the second subgroup of air conditioners when the interval between sending the previous defrosting command and the previous defrosting command reaches a preset interval. The second subgroup of air conditioners receives and responds to the defrosting command, switches from the non-defrosting state to the defrosting state, and controls the newly added defrosting air conditioners of the air conditioning unit to defrost according to the preset interval. This can avoid the sudden drop in the heating capacity of the air conditioning unit caused by real-time defrosting of the newly added defrosting air conditioners, which would lead to large fluctuations in the indoor temperature heated by the air conditioning unit. This is beneficial to improving the stability of the indoor temperature heated by the air conditioning unit.

[0140] The preset interval duration can be a user-defined interval duration or an interval duration automatically generated by the control device based on the process of defrosting the air conditioning unit multiple times; no limitation is made here.

[0141] In one application scenario, such as Figure 4 As shown, the defrosting control method for an air conditioning unit may include the following steps 301 to 307.

[0142] Step 301: Obtain a defrost request.

[0143] The defrost request can be used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted.

[0144] Step 302: Calculate the number of air conditioners currently defrosting in the air conditioning unit.

[0145] Step 303: Determine whether the air conditioning unit has reached the maximum number of air conditioners requiring defrosting.

[0146] When it is determined that the number of air conditioning units has not reached the maximum number of air conditioners to defrost, proceed to step 304;

[0147] If it is determined that the number of air conditioning units has not reached the maximum number of defrosting air conditioners, return to step 302.

[0148] Step 304: Calculate the number of additional defrosting air conditioners that can be added to the air conditioning unit.

[0149] Step 305: Sort the air conditioners currently waiting to be defrosted in descending order of defrost waiting time to obtain the current air conditioner queue.

[0150] The air conditioners currently awaiting defrosting include the initial queue of air conditioners awaiting defrosting and the first subgroup of air conditioners.

[0151] Step 306: Starting from the first position of the current defrost queue, select the air conditioners that can be added to the defrost queue to obtain the second subgroup of air conditioners.

[0152] Step 307: Send a defrost command to the second subgroup air conditioner to switch the second subgroup air conditioner from non-defrost state to defrost state.

[0153] The solution provided in this application obtains a defrost request and, in response, arranges the first subgroup of air conditioners to the end of the initial defrost queue of the air conditioning unit, thus obtaining the current defrost queue. It also determines the current number of air conditioners requiring defrost. If the current number of air conditioners requiring defrost is less than the maximum number of air conditioners that can be defrosted, it determines the number of air conditioners that can be added to the air conditioning unit for defrosting. Based on the number of air conditioners that can be added for defrosting, it selects the second subgroup of air conditioners from the current defrost queue and sends a defrost command to the second subgroup of air conditioners, switching them from a non-defrost state to a defrost state. This achieves the ability to select new air conditioners for defrosting from the current defrost queue based on the current number of air conditioners requiring defrost and the maximum number of air conditioners requiring defrost during the operation of the air conditioning unit, and controls these new air conditioners to perform defrosting. Since the current defrost queue is sorted in descending order of defrost waiting time, it can suppress the problem of air conditioners with larger unit numbers not being defrosted in time when the air conditioning unit defrosts according to unit number order, thereby improving the operating energy efficiency of the air conditioning unit.

[0154] Please see Figure 5 This document illustrates a flowchart of a defrosting control method for an air conditioning unit according to another embodiment of this application. In a specific embodiment, the defrosting control method for the air conditioning unit can be applied to, for example... Figure 1 The control device 200 in the defrosting system of the air conditioning unit shown below will be used as an example to explain... Figure 5 The process shown is described in detail. The defrosting control method for air conditioning units may include the following steps 401 to 408.

[0155] Step 401: Determine the frosting status of the air conditioning unit.

[0156] In this embodiment, the frosting state may include an easy-to-frost state, a normal frosting state, and a difficult-to-frost state, etc., and is not limited here.

[0157] The control equipment can obtain the ambient temperature and humidity of the environment where the air conditioning unit is located, and determine the frosting status of the air conditioning unit based on the ambient temperature and humidity.

[0158] When the ambient temperature is lower than the first temperature threshold and the ambient humidity is higher than the first humidity threshold, the air conditioning unit is determined to be in the first frosting state; when the ambient temperature is higher than the second temperature threshold and the ambient humidity is lower than the second humidity threshold, the air conditioning unit is determined to be in the second frosting state; when the ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, and the ambient humidity is greater than or equal to the second humidity threshold and less than or equal to the first humidity threshold, the air conditioning unit is determined to be in the third frosting state.

[0159] The first frosting state can be used to characterize that the air conditioning unit is in a state of easy frosting, the second frosting state can be used to characterize that the air conditioning unit is in a state of difficult frosting, and the third frosting state can be used to characterize that the air conditioning unit is in a state of normal frosting.

[0160] The first temperature threshold is less than the second temperature threshold, and the first humidity threshold is greater than the second humidity threshold.

[0161] Step 402: Adjust the maximum number of defrosting air conditioners and the preset interval time according to the frosting status.

[0162] In this embodiment, after the control device determines the frosting state of the air conditioning unit, it can adjust the maximum number of air conditioners to be defrosted and the preset interval time according to the frosting state. Adjusting the number of air conditioners to be defrosted and the defrosting interval time according to the frosting state of the air conditioning unit can ensure that the air conditioning unit meets the heating demand while having high operating energy efficiency.

[0163] Specifically, when the air conditioning unit is determined to be in the first frosting state, the maximum number of air conditioners requiring defrosting and the preset interval time can be reduced. When the air conditioning unit is determined to be in the second frosting state, the maximum number of air conditioners requiring defrosting and the preset interval time can be increased. When the air conditioning unit is determined to be in the third frosting state, the maximum number of air conditioners requiring defrosting and the preset interval time can remain unchanged.

[0164] Step 403: Obtain a defrost request.

[0165] Step 404: In response to the defrost request, the first subgroup of air conditioners is placed at the end of the initial defrost queue of the air conditioning unit to obtain the current defrost queue.

[0166] Step 405: Determine the number of air conditioners currently defrosting in the air conditioning unit.

[0167] Step 406: If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners for the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit.

[0168] Step 407: Select the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting.

[0169] Step 408: Send a defrost command to the second subgroup air conditioner to switch the second subgroup air conditioner from non-defrost state to defrost state.

[0170] In this embodiment, steps 403, 404, 405, 406, 407 and 408 can refer to the content of the corresponding steps in the foregoing embodiments, and are not limited here.

[0171] The solution provided in this embodiment determines the frosting state of the air conditioning unit, adjusts the maximum number of air conditioners to be defrosted and the preset interval time according to the frosting state, obtains a defrosting request, and responds to the defrosting request by arranging the first subgroup of air conditioners to the end of the initial queue of air conditioners to be defrosted in the air conditioning unit, thus obtaining the current queue of air conditioners to be defrosted. It also determines the current number of air conditioners to be defrosted in the air conditioning unit. If the current number of air conditioners to be defrosted is less than the maximum number of air conditioners to be defrosted in the air conditioning unit, it determines the number of air conditioners that can be added to the air conditioning unit for defrosting, and selects the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting. The system sends defrost commands to the first subgroup of air conditioners, switching them from non-defrost to defrost mode. This allows for the selection of new air conditioners to defrost from the current queue based on the current and maximum number of air conditioners to be defrosted during operation. Since the queue is ordered from longest to shortest defrost waiting time, this system mitigates the problem of longer defrost times for air conditioners when defrosting is performed sequentially by unit number, thus improving the overall energy efficiency of the air conditioning unit.

[0172] Furthermore, by adjusting the number of air conditioners requiring defrosting and the defrosting interval based on the frosting status of the air conditioning unit, it can be ensured that the air conditioning unit meets heating requirements while maintaining high operating energy efficiency.

[0173] Please see Figure 6 This application illustrates a defrosting control device 500 for an air conditioning unit according to an embodiment of the present application. The defrosting control device 500 for the air conditioning unit can be applied to, for example... Figure 1 The control device 200 in the defrosting system of the air conditioning unit shown below will be used as an example to explain... Figure 6 The defrosting control device 500 of the air conditioning unit shown will be described in detail. The defrosting control device 500 of the air conditioning unit may include an acquisition module 510, an arrangement module 520, a first determination module 530, a second determination module 540, a filtering module 550, and a sending module 560.

[0174] The acquisition module 510 can be used to acquire a defrost request, which can be used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted; the arrangement module 520 can be used to respond to the defrost request by arranging the first subgroup of air conditioners to the end of the initial queue of air conditioners to be defrosted in the air conditioning unit, thus obtaining the current queue of air conditioners to be defrosted. The initial queue of air conditioners to be defrosted can be arranged in descending order of the defrost waiting time of the air conditioners to be defrosted; the first determination module 530 can be used to determine the current number of air conditioners to be defrosted in the air conditioning unit; the second determination module 540 can be used to determine if... When the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, the number of air conditioners that can be added to the air conditioning unit for defrosting is determined; the filtering module 550 can be used to filter out the second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting. The second subgroup of air conditioners can be the first N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N can be greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting; the sending module 560 can be used to send a defrosting command to the second subgroup of air conditioners to switch the second subgroup of air conditioners from the non-defrosting state to the defrosting state.

[0175] In some implementations, the filtering module 550 may include a first determining unit and a filtering unit.

[0176] The first determining unit can be used to determine the number of air conditioners to be defrosted in the current air conditioner queue; the filtering unit can be used to filter out the second subgroup of air conditioners from the current air conditioner queue based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting.

[0177] In some implementations, the filtering unit may include a selection subunit and a first determination subunit.

[0178] The selection subunit can be used to select the number of air conditioners to be defrosted from the first position of the current air conditioner queue when the number of air conditioners to be defrosted is greater than or equal to the number of air conditioners that can be added for defrosting, thus obtaining the second subgroup of air conditioners; the first determination subunit can be used to determine all air conditioners to be defrosted corresponding to the current air conditioner queue as the second subgroup of air conditioners when the number of air conditioners to be defrosted is less than the number of air conditioners that can be added for defrosting.

[0179] In some implementations, the first subgroup of air conditioners may include multiple air conditioners, and the arrangement module 520 may include a response unit and an arrangement unit.

[0180] The response unit can be used to respond to a defrost request and determine the arrangement order of multiple air conditioners; the arrangement unit can be used to arrange multiple air conditioners to the end of the initial air conditioner queue to be defrosted according to the arrangement order, so as to obtain the current air conditioner queue to be defrosted.

[0181] In some implementations, the response unit may include a first judgment subunit and a second determination subunit.

[0182] The second determining subunit can be used to respond to a defrost request and determine whether the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are the same; the second determining subunit can be used to determine the arrangement order of the multiple air conditioners in ascending order of liquid-side temperature when it is determined that the liquid-side temperatures of the outdoor heat exchangers of multiple air conditioners are different.

[0183] In some implementations, the response unit may further include a second judgment subunit and a third determination subunit.

[0184] The second judgment subunit can be used to determine whether the compressor discharge pressure of multiple air conditioners is the same when the liquid side temperature of the outdoor heat exchanger of multiple air conditioners is the same; the third determination subunit can be used to determine the arrangement order of multiple air conditioners according to the order of compressor discharge pressure from small to large when the compressor discharge pressure of multiple air conditioners is different.

[0185] In some implementations, the response unit may further include a third judgment subunit, a fourth determination subunit, and a fifth determination subunit.

[0186] The third judgment subunit can be used to determine whether the defrosting intervals of multiple air conditioners are the same when the compressor discharge pressure of multiple air conditioners is the same; the fourth determination subunit can be used to determine the arrangement order of multiple air conditioners in descending order of defrosting interval when the defrosting intervals of multiple air conditioners are different; the fifth determination subunit can be used to determine the arrangement order of multiple air conditioners in ascending order of preset air conditioner serial numbers when the defrosting intervals of multiple air conditioners are the same.

[0187] In some implementations, the transmitting module 560 may include a transmitting unit.

[0188] The sending unit can be used to send a defrost command to the second subgroup of air conditioners when the interval between the last defrost command and the previous defrost command has reached a preset interval.

[0189] In some embodiments, the defrosting control device 500 of the air conditioning unit may further include a third determining module and an adjusting module.

[0190] The third determining module can be used to determine the frosting status of the air conditioning unit before the obtaining module 510 obtains the defrosting request; the adjusting module can be used to adjust the maximum number of defrosting air conditioners and the preset interval time according to the frosting status.

[0191] The solution provided in this embodiment obtains a defrost request, which instructs the first subgroup of air conditioners in the air conditioning unit to be defrosted. In response to the defrost request, the first subgroup of air conditioners is moved to the end of the initial queue of air conditioners to be defrosted in the air conditioning unit, thus obtaining the current queue of air conditioners to be defrosted. The initial queue of air conditioners to be defrosted is arranged in descending order of their defrost waiting time. The current number of air conditioners to be defrosted in the air conditioning unit is determined. If the current number of air conditioners to be defrosted is less than the maximum number of air conditioners to be defrosted in the air conditioning unit, the number of air conditioners that can be added to the air conditioning unit is determined, and the number of air conditioners to be added to the current queue of air conditioners to be defrosted is determined based on the number of air conditioners that can be added to the current queue of air conditioners to be defrosted. The system selects the second subgroup of air conditioners from the queue and sends a defrost command to them, switching them from non-defrost to defrost mode. This allows the system to select new air conditioners from the current queue for defrosting based on the current number of air conditioners to be defrosted and the maximum number of air conditioners to be defrosted during the operation of the air conditioning unit. The system then controls these new air conditioners to begin defrosting. Since the current queue of air conditioners to be defrosted is sorted in descending order of defrost waiting time, the system can prevent air conditioners with larger unit numbers from being defrosted in a timely manner when the air conditioning unit defrosts according to their unit numbers, thus improving the operating efficiency of the air conditioning unit.

[0192] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For device embodiments, since they are basically similar to method embodiments, the description is relatively simple; relevant parts can be referred to in the descriptions of the method embodiments. Any processing method described in the method embodiments can be implemented in the device embodiments through corresponding processing modules, and will not be elaborated upon further in the device embodiments.

[0193] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0194] Please refer to Figure 7 This diagram illustrates a structural block diagram of a computer-readable storage medium provided in an embodiment of this application. The computer-readable storage medium 600 stores program code 610, which can be called by a processor to execute the methods described in the above method embodiments.

[0195] The computer-readable storage medium 600 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Optionally, the computer-readable storage medium 600 includes a non-transitory computer-readable storage medium. The computer-readable storage medium 600 has storage space for program code 610 that performs any of the method steps described above. This program code can be read from or written to one or more computer program products. The program code 610 may, for example, be compressed in a suitable form.

[0196] Please refer to Figure 8 This diagram illustrates a structural block diagram of a computer program product 700 provided in an embodiment of this application. The computer program product 700 includes a computer program / instructions 710, which is stored in a computer-readable storage medium of a computer device. When the computer program product 700 runs on the computer device, the processor of the computer device reads the computer program / instructions 710 from the computer-readable storage medium, and executes the computer program / instructions 710, causing the computer device to perform the methods described in the above method embodiments.

[0197] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A defrosting control method for an air conditioning unit, characterized in that, include: Obtain a defrost request, the defrost request being used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted; In response to the defrosting request, the first subgroup of air conditioners is placed at the end of the initial defrosting queue of the air conditioning unit to obtain the current defrosting queue. The initial defrosting queue is arranged in descending order of the defrosting waiting time of the air conditioners. Determine the number of air conditioners currently defrosting in the air conditioning unit; If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit. Based on the number of air conditioners that can be added for defrosting, a second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted. The second subgroup of air conditioners consists of the top N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting. Send a defrost command to the second subgroup of air conditioners to switch the second subgroup of air conditioners from non-defrost state to defrost state.

2. The defrosting control method according to claim 1, characterized in that, The step of selecting a second subgroup of air conditioners from the current queue of air conditioners to be defrosted based on the number of air conditioners that can be added for defrosting includes: Determine the number of air conditioners in the current defrost queue; Based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting, the second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted.

3. The defrosting control method according to claim 2, characterized in that, The step of selecting the second subgroup of air conditioners from the current queue of air conditioners awaiting defrosting based on the number of air conditioners to be defrosted and the number of air conditioners that can be added for defrosting includes: When the number of air conditioners to be defrosted is greater than or equal to the number of air conditioners that can be added for defrosting, the number of air conditioners to be defrosted that can be added for defrosting is selected from the first position of the current air conditioner queue to obtain the second subgroup of air conditioners. When the number of air conditioners to be defrosted is less than the number of air conditioners that can be added for defrosting, all air conditioners to be defrosted corresponding to the current air conditioner queue are identified as the second subgroup of air conditioners.

4. The defrosting control method according to any one of claims 1 to 3, characterized in that, The first subgroup of air conditioners includes multiple air conditioners. In response to the defrost request, the first subgroup of air conditioners is arranged to the end of the initial defrost queue of the air conditioning unit, resulting in the current defrost queue, including: In response to the defrost request, determine the arrangement order of the multiple air conditioners; According to the arrangement order, the multiple air conditioners are arranged to the end of the initial air conditioner queue to be defrosted, thus obtaining the current air conditioner queue to be defrosted.

5. The defrosting control method according to claim 4, characterized in that, The step of determining the arrangement order of the multiple air conditioners in response to the defrost request includes: In response to the defrost request, determine whether the liquid-side temperature of the outdoor heat exchangers of the multiple air conditioners is the same; When it is determined that the liquid-side temperatures of the outdoor heat exchangers of the multiple air conditioners are different, the order in which the multiple air conditioners are arranged according to their liquid-side temperatures from smallest to largest is determined as the arrangement order.

6. The defrosting control method according to claim 5, characterized in that, The step of determining the arrangement order of the multiple air conditioners in response to the defrost request further includes: When it is determined that the liquid side temperature of the outdoor heat exchangers of the multiple air conditioners is the same, it is determined whether the discharge pressure of the compressors of the multiple air conditioners is the same. When it is determined that the compressor discharge pressures of the multiple air conditioners are different, the arrangement order is determined by arranging the multiple air conditioners in ascending order of compressor discharge pressure.

7. The defrosting control method according to claim 6, characterized in that, The step of determining the arrangement order of the multiple air conditioners in response to the defrost request further includes: When it is determined that the compressor discharge pressure of the multiple air conditioners is the same, it is determined whether the defrosting interval of the multiple air conditioners is the same. When it is determined that the defrosting intervals of the multiple air conditioners are different, the order in which the multiple air conditioners are arranged from largest to smallest according to the defrosting interval is determined as the arrangement order; When it is determined that the defrosting intervals of the multiple air conditioners are the same, the order in which the multiple air conditioners are arranged in ascending order according to the preset air conditioner serial number is determined as the arrangement order.

8. The defrosting control method according to any one of claims 1 to 3, characterized in that, Sending the defrost command to the second subgroup of air conditioners includes: When the interval between sending the previous defrost command and the previous defrost command reaches a preset interval, the defrost command is sent to the second subgroup of air conditioners.

9. The defrosting control method according to claim 8, characterized in that, Before obtaining the defrost request, the defrost control method further includes: Determine the frosting status of the air conditioning unit; The maximum number of defrosting air conditioners and the preset interval time are adjusted according to the frosting state.

10. A defrosting control system for an air conditioning unit, characterized in that, It includes an air conditioning unit and a controller, wherein the air conditioning unit is connected to the controller; The controller is configured to: Obtain a defrost request, the defrost request being used to instruct the first subgroup of air conditioners in the air conditioning unit to be defrosted; In response to the defrosting request, the first subgroup of air conditioners is placed at the end of the initial defrosting queue of the air conditioning unit to obtain the current defrosting queue. The initial defrosting queue is arranged in descending order of the defrosting waiting time of the air conditioners. Determine the number of air conditioners currently defrosting in the air conditioning unit; If the current number of defrosting air conditioners is less than the maximum number of defrosting air conditioners in the air conditioning unit, determine the number of additional defrosting air conditioners that can be added to the air conditioning unit. Based on the number of air conditioners that can be added for defrosting, a second subgroup of air conditioners is selected from the current queue of air conditioners to be defrosted. The second subgroup of air conditioners consists of the top N air conditioners to be defrosted in the current queue of air conditioners to be defrosted, where N is greater than or equal to 1 and is related to the number of air conditioners that can be added for defrosting. Send a defrost command to the second subgroup of air conditioners to switch the second subgroup of air conditioners from non-defrost state to defrost state.

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