Defrosting control method of outdoor unit, outdoor unit, and storage medium

Abstract

The application provides a defrosting control method of an outdoor unit, the outdoor unit and a storage medium. The outdoor unit is provided with a heat pump unit. The defrosting control method of the outdoor unit comprises the following steps: acquiring an environmental parameter and a system parameter of the heat pump unit; determining whether the environmental parameter and the system parameter meet a preset first condition; if yes, controlling the heat pump unit to enter a defrosting mode; if no, continuously determining whether the system parameter and the environmental parameter meet a preset second condition, and adjusting the first condition when the system parameter and the environmental parameter meet the second condition; and the adjusted first condition is easier to meet than the unadjusted first condition. The application relates to the technical field of air conditioners, and can improve the defrosting control efficiency of the outdoor unit.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to the field of defrosting control technology, and more particularly to a defrosting control method for an outdoor unit, an outdoor unit, and a storage medium. Background Technology

[0002] When an air conditioner is operating, if the evaporator temperature is low, some moisture in the air will condense on the evaporator, causing frost to form and leading to malfunctions. For example, when the air conditioner is in heating mode, if the outdoor temperature is too low, moisture in the air will condense into frost on the surface of the coils (finned heat exchangers) of the outdoor unit. Therefore, timely defrosting of the air conditioner is crucial for its maintenance.

[0003] In some related technologies, solutions determine whether the air conditioner needs to be defrosted using a heat pump unit based on ambient temperature and the temperature of the air conditioner's coils. However, these methods cannot accurately determine whether defrosting should be performed based on the overall operating status of the heat pump unit, resulting in incomplete defrosting and consequently low defrosting efficiency. Summary of the Invention

[0004] In view of the above, it is necessary to propose a defrosting control method for an outdoor unit, an outdoor unit, and a storage medium to solve the technical problem of low efficiency during defrosting operations.

[0005] This application provides a defrosting control method for an outdoor unit, wherein the outdoor unit is equipped with a heat pump unit. The control method includes: acquiring environmental parameters and system parameters of the heat pump unit; determining whether the environmental parameters and the system parameters meet a preset first condition; if yes, controlling the heat pump unit to enter a defrosting mode; if no, continuing to determine whether the system parameters and the environmental parameters meet a preset second condition, and adjusting the first condition when the system parameters and the environmental parameters meet the second condition; wherein the adjusted first condition is easier to meet than the original first condition.

[0006] In some embodiments, the environmental parameters include ambient temperature, and the system parameters include the evaporation temperature of the refrigerant in the heat pump unit. The step of obtaining the environmental parameters and the system parameters of the heat pump unit includes: obtaining the ambient temperature and the evaporation temperature according to a preset cycle.

[0007] In some embodiments, the system parameters further include the inlet water temperature of the heat pump unit, and the first condition includes: the ambient temperature is less than a preset first temperature threshold; the duration for which the evaporation temperature is lower than the defrost curve value is greater than or equal to a preset first duration threshold; and the inlet water temperature is higher than a preset second temperature threshold; wherein, the defrost curve value is the evaporation temperature corresponding to the ambient temperature on a pre-stored defrost curve, and the pre-stored defrost curve is used to characterize the correspondence between the ambient temperature and the evaporation temperature.

[0008] In some embodiments, the first condition further includes: the cumulative duration of the outdoor unit's hot operation is greater than or equal to a preset second duration threshold, or the time elapsed since the outdoor unit exited the previous defrost mode is greater than or equal to a third duration threshold.

[0009] In some embodiments, the second condition includes the heat pump unit not entering the defrost mode after a preset defrost interval. The step of adjusting the first condition includes: after a preset time interval, adjusting the first duration threshold to a fourth duration threshold; wherein the fourth duration threshold is less than the first duration threshold.

[0010] In some embodiments, the second condition includes: the heat pump unit has not entered the defrost mode after a preset defrost interval and the ambient temperature is greater than a preset third temperature threshold. The step of adjusting the first condition includes: after a preset time interval, shifting the defrost curve upward and adjusting the first duration threshold to a fourth duration threshold; wherein the fourth duration threshold is less than the first duration threshold.

[0011] In some embodiments, the number of outdoor units is two or more, each outdoor unit is equipped with a heat pump unit, and the two or more heat pump units include a target heat pump unit. The control method further includes: determining whether the number of heat pump units in defrost mode among the two or more heat pump units is less than half of the total number of the two or more heat pump units; if so, and the environmental parameters and the system parameters meet the first condition, then controlling the target heat pump unit to enter defrost mode.

[0012] This application embodiment also provides an outdoor unit, which is equipped with a heat pump unit. The heat pump unit includes a compressor, and the outdoor unit further includes a first sensor, a second sensor, and a controller. The first sensor is used to acquire environmental parameters. The second sensor is installed at the air intake of the compressor to acquire some system parameters of the heat pump unit. The controller is connected to the heat pump unit and is used to determine whether the environmental parameters and the system parameters meet a preset first condition. If yes, the controller controls the heat pump unit to enter a defrost mode. If no, the controller continues to determine whether the system parameters and the environmental parameters meet a preset second condition, and adjusts the first condition when the system parameters and the environmental parameters meet the second condition. The adjusted first condition is easier to meet than the original first condition.

[0013] This application also provides an outdoor unit, including a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor. When the processor executes the computer-readable instructions, it implements a defrosting control method for the outdoor unit.

[0014] This application also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an outdoor unit to implement the defrosting control method for the outdoor unit.

[0015] As can be seen from the above technical solutions, the embodiments of this application determine whether the outdoor unit needs to enter defrost mode by judging whether the environmental parameters of the outdoor unit and the system parameters of the heat pump unit meet the first condition. Thus, judging whether the outdoor unit needs defrosting based on real-time changing quantitative data can improve the defrosting efficiency of the outdoor unit. Furthermore, when the environmental and system parameters fail to meet the first condition, and the heat pump unit has not defrosted the outdoor unit for a long time, adjusting the first condition lowers the standard for the heat pump unit to enter defrost mode, thereby improving the defrosting efficiency of the heat pump unit and avoiding the defect of incomplete defrosting. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an outdoor unit provided in one embodiment of this application.

[0017] Figure 2 This is a flowchart of a defrosting control method for an outdoor unit provided in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of a defrosting curve provided in an embodiment of this application.

[0019] Figure 4This is a flowchart of a method for controlling a target heat pump unit to enter defrost mode according to an embodiment of this application.

[0020] Figure 5 This is a structural schematic diagram of an outdoor unit provided in another embodiment of this application. Detailed Implementation

[0021] To better understand the purpose, features, and advantages of this application, a detailed description of the application is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other. Numerous specific details are set forth in the following description to provide a thorough understanding of this application; the described embodiments are only a part of the embodiments of this application, and not all of them.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] This application provides a defrosting control method for an outdoor unit, which can be applied to one or more electronic devices. An electronic device is a device that can automatically perform numerical calculations and / or information processing according to pre-set or stored instructions. Its hardware includes, but is not limited to, microprocessors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), digital signal processors (DSPs), embedded devices, etc.

[0025] Electronic devices can be any electronic product that allows human-computer interaction with a customer, such as personal computers, tablets, smartphones, personal digital assistants (PDAs), game consoles, interactive network television (IPTV), smart wearable devices, etc.

[0026] Electronic devices may also include network devices and / or client devices. The network devices include, but are not limited to, a single network server, a server group consisting of multiple network servers, or a cloud based on cloud computing consisting of a large number of hosts or network servers.

[0027] The networks in which electronic devices are located include, but are not limited to, the Internet, wide area networks, metropolitan area networks, local area networks, and virtual private networks (VPNs).

[0028] like Figure 1 As shown, the defrosting control method for outdoor units provided in this application can be applied to outdoor unit 100. Outdoor unit 100 is equipped with a heat pump unit 110, which includes a compressor 111 and a finned heat exchanger 112. The compressor 111 delivers refrigerant to the finned heat exchanger 112, thereby utilizing the heat in the refrigerant to defrost the finned heat exchanger 112.

[0029] In one embodiment of this application, the outdoor unit further includes a first sensor 120 and a second sensor 130. The first sensor 120 is used to acquire environmental parameters, and the second sensor 130 is disposed at the suction port of the compressor 111 and is used to acquire some system parameters of the heat pump unit 110. The environmental parameters include ambient temperature, and the system parameters include the evaporation temperature of the refrigerant in the heat pump unit 110.

[0030] In one embodiment of this application, the outdoor unit further includes a controller 140. The controller 140 is connected to the heat pump unit 110 and is used to determine whether environmental parameters and system parameters meet a preset first condition. When the controller 140 determines that the environmental parameters and system parameters meet the preset first condition, it controls the heat pump unit 110 to enter defrost mode. When the controller 140 determines that the environmental parameters and system parameters do not meet the preset first condition, it continues to determine whether the system parameters and environmental parameters meet a preset second condition, and when the system parameters and environmental parameters meet the second condition, it adjusts the first condition. The adjusted first condition is easier to meet than the original first condition.

[0031] In one embodiment of this application, the first condition includes: the ambient temperature is less than a preset first temperature threshold; the duration for which the evaporation temperature is lower than the defrost curve value is greater than or equal to a preset first duration threshold; and the inlet water temperature is higher than a preset second temperature threshold. The defrost curve value is the evaporation temperature corresponding to the ambient temperature on a pre-stored defrost curve, and the pre-stored defrost curve is used to characterize the correspondence between the ambient temperature and the evaporation temperature.

[0032] It should be noted that the heat pump unit also includes an air conditioning side heat exchanger for connection to the terminal water system. This air conditioning side heat exchanger typically functions as a condenser in the heat pump unit's heating mode and as an evaporator in its cooling mode. The inlet water temperature mentioned in this application refers to the inlet water temperature of the air conditioning side heat exchanger.

[0033] In one embodiment of this application, the first condition further includes: the cumulative duration of the outdoor unit's hot operation is greater than or equal to a preset second duration threshold, or the time elapsed since the outdoor unit exited the previous defrost mode is greater than or equal to a third duration threshold.

[0034] In one embodiment of this application, when the controller 140 determines that the environmental parameters and system parameters meet a preset first condition, it indicates that the controller 140 determines that the outdoor unit 100 may be frosted in the current environment, and the controller 140 can control the heat pump unit 110 to enter the defrosting mode. When the controller 140 determines that the environmental parameters and system parameters fail to meet the preset first condition, it indicates that the outdoor unit 100 may not be frosted when the environment of the outdoor unit 100 is evaluated according to the preset first condition. In order to improve the defrosting accuracy of the outdoor unit 100 and avoid damage to the outdoor unit 100 due to incomplete defrosting, the controller 140 further determines whether the system parameters and environmental parameters meet a preset second condition, and when the system parameters and environmental parameters meet the second condition, adjusts the first condition to a state that is easier to meet.

[0035] In one embodiment of this application, the second condition includes: the heat pump unit has not entered defrost mode after a preset defrost interval. When the controller 140 determines that the system parameters and environmental parameters meet the second condition, it indicates that the heat pump unit has not defrosted the outdoor unit for a relatively long period of time, and the probability of frost formation on the outdoor unit is high. Therefore, the controller 140 can adjust the first condition to ensure that the adjusted first condition is easier to meet than the original first condition. In this way, the environmental parameters and system parameters are more likely to meet the adjusted first condition, thereby ensuring that the heat pump unit 110 is more likely to enter defrost mode, thus improving the efficiency of the heat pump unit 110 in defrosting the outdoor unit 100.

[0036] like Figure 2The diagram shown is a flowchart of a defrosting control method for an outdoor unit according to an embodiment of this application. The order of steps in the flowchart can be changed, and some steps can be omitted, depending on different requirements. The defrosting control method for an outdoor unit provided in this embodiment includes the following steps.

[0037] S20, acquire environmental parameters and system parameters of the heat pump unit.

[0038] In one embodiment of this application, in order to monitor the environment in which the outdoor unit is located in a timely manner and thus control the heat pump unit to defrost the outdoor unit in a timely manner, the environmental parameters of the environment in which the outdoor unit is located and the system parameters of the heat pump unit can first be obtained. Among them, the environmental parameters can be the ambient temperature, ambient humidity, ambient atmospheric pressure, etc.; the system parameters of the heat pump unit can be the inlet water temperature of the heat pump unit.

[0039] Among them, the probability of outdoor unit frosting is higher when the ambient temperature is low; and when the inlet water temperature of the heat pump unit is high, the probability of outdoor unit frosting also increases due to the large temperature difference between the inside and outside.

[0040] In one embodiment of this application, in order to improve the defrosting efficiency of the outdoor unit by the heat pump unit, it is necessary to promptly determine whether the outdoor unit needs defrosting in its current environment. Therefore, the environmental parameters of the outdoor unit's environment and the system parameters of the heat pump unit can be continuously monitored. Specifically, the steps for obtaining the environmental parameters and the system parameters of the heat pump unit include: obtaining the ambient temperature and evaporation temperature according to a preset cycle. The preset cycle can be set by the outdoor unit maintenance personnel; for example, the preset cycle can be 40 minutes, 50 minutes, 80 minutes, etc., and this application does not limit this.

[0041] S21. Determine whether the environmental parameters and the system parameters meet the preset first condition. If yes, proceed to step S22; otherwise, proceed to step S23.

[0042] In one embodiment of this application, the first condition includes: the ambient temperature is less than a preset first temperature threshold; the duration for which the evaporation temperature is lower than the defrost curve value is greater than or equal to a preset first duration threshold; and the inlet water temperature is higher than a preset second temperature threshold. The defrost curve value is the evaporation temperature corresponding to the ambient temperature on a pre-stored defrost curve, which characterizes the correspondence between the ambient temperature and the evaporation temperature. For example, the first temperature threshold can be 12 degrees Celsius; the preset first duration threshold can be 120 seconds; and the second temperature threshold can be 15 degrees Celsius. Specifically, under the current ambient temperature of the outdoor unit, if the evaporation temperature of the refrigerant in the heat pump unit is lower than the evaporation temperature corresponding to the ambient temperature on the defrost curve for more than 120 seconds, then it can be determined that the outdoor unit is frosted.

[0043] For example, such as Figure 3 The diagram shows the defrost curve, where the horizontal axis represents the ambient temperature and the vertical axis represents the evaporation temperature of the refrigerant in the heat pump unit. Specifically, DFA represents the evaporation temperature corresponding to an ambient temperature of -30 degrees Celsius in the defrost curve; DFB represents the evaporation temperature corresponding to an ambient temperature of 10 degrees Celsius in the defrost curve. Figure 3 As shown, when the ambient temperature is 6 degrees Celsius, if the evaporation temperature of the refrigerant is below -6.5 degrees Celsius, the probability of the outdoor unit frosting is relatively high; when the ambient temperature is 6 degrees Celsius, if the evaporation temperature of the refrigerant is greater than or equal to -6.5 degrees Celsius, the probability of the outdoor unit frosting is relatively low.

[0044] In one embodiment of this application, the first condition further includes: the cumulative duration of the outdoor unit's hot operation is greater than or equal to a preset second duration threshold, or the time elapsed since the outdoor unit exited the previous defrost mode is greater than or equal to a third duration threshold. For example, the second duration threshold may be 15 minutes; the third duration threshold may be 40 minutes.

[0045] In one embodiment of this application, when it is determined that the environmental parameters and system parameters meet the first condition, it indicates that the probability of the outdoor unit frosting is high. In this case, the outdoor unit can execute step S22 to control the heat pump unit to enter the defrosting mode. When it is determined that the environmental parameters and system parameters do not meet the first condition, it indicates that judging whether the outdoor unit is frosting based on the current first condition may be too strict. In this case, the outdoor unit can execute step S23 to determine whether to update the first condition, thereby making it easier for the heat pump unit to enter the defrosting mode and thus improving the defrosting efficiency of the heat pump unit for the outdoor unit.

[0046] S22, control the heat pump unit to enter defrost mode.

[0047] In one embodiment of this application, when the environmental and system parameters meet a first condition, it indicates a high probability of frost formation on the outdoor unit. At this time, the heat pump unit can be controlled to enter defrost mode, enabling timely defrosting of the outdoor unit. Specifically, after the outdoor unit controls the heat pump unit to enter defrost mode, the compressor in the outdoor unit delivers refrigerant to the finned heat exchanger, thereby increasing the temperature of the finned heat exchanger and achieving the defrosting effect.

[0048] S23, determine whether the system parameters and the environmental parameters meet the preset second condition. If the system parameters and the environmental parameters meet the second condition, adjust the first condition and re-execute step S20.

[0049] In one embodiment of this application, when it is determined that the environmental parameters and system parameters do not meet the first condition, it indicates that judging whether the outdoor unit is frosted based on the current first condition may be too strict. The outdoor unit may have frosted, but the first condition failed to detect it. Therefore, it is necessary to adjust the first condition so that the heat pump unit can more easily enter the defrosting mode, thereby improving the defrosting efficiency of the heat pump unit for the outdoor unit.

[0050] In one embodiment of this application, the second condition includes: the heat pump unit has not entered defrost mode after a preset defrost interval. When the system parameters and environmental parameters are determined to meet the second condition, it indicates that the heat pump unit has not defrosted the outdoor unit for a relatively long period of time, and the probability of frost formation on the outdoor unit is high. Therefore, the first condition can be adjusted to ensure that the adjusted first condition is easier to meet than the original first condition, making it easier for the heat pump unit to enter defrost mode. In this embodiment, the step of adjusting the first condition includes: after a preset time interval, adjusting the first duration threshold to a fourth duration threshold; wherein the fourth duration threshold is less than the first duration threshold. For example, the preset time interval can be 5 minutes, and the fourth duration threshold can be 60 seconds.

[0051] In another embodiment of this application, the second condition includes: the heat pump unit has not entered the defrost mode after a preset defrost interval and the ambient temperature is greater than a preset third temperature threshold. When it is determined that the system parameters and environmental parameters meet the second condition, it indicates that the heat pump unit has not defrosted the outdoor unit for a relatively long period of time, and the current ambient temperature is high, so the probability of frost forming on the outdoor unit is high. In this embodiment, the step of adjusting the first condition includes: after a preset time interval, shifting the defrost curve upward and adjusting the first duration threshold to a fourth duration threshold; wherein, the fourth duration threshold is less than the first duration threshold. Specifically, shifting the defrost curve upward includes: increasing the evaporation temperature corresponding to each ambient temperature in the defrost curve by an equal amount. For example, before shifting the defrost curve, the evaporation temperature corresponding to an ambient temperature of 6 degrees Celsius in the defrost curve is -6.5 degrees Celsius; then after shifting the defrost curve, the evaporation temperature corresponding to an ambient temperature of 6 degrees Celsius in the defrost curve can be -5.5 degrees Celsius.

[0052] In one embodiment of this application, after adjusting the first condition, the outdoor unit can re-execute step S20 to re-determine whether the environmental parameters of the current environment where the outdoor unit is located and the system parameters of the heat pump unit meet the adjusted first condition. Thus, by continuously adjusting the first condition and updating the criteria for the heat pump unit to enter defrost mode, the efficiency of the heat pump unit in defrosting the outdoor unit can be improved.

[0053] As can be seen from the above technical solutions, the embodiments of this application determine whether the outdoor unit needs to enter defrost mode by judging whether the environmental parameters of the outdoor unit and the system parameters of the heat pump unit meet the first condition. Thus, judging whether the outdoor unit needs defrosting based on real-time changing quantitative data can improve the defrosting efficiency of the outdoor unit. Furthermore, when the environmental and system parameters fail to meet the first condition, and the heat pump unit has not defrosted the outdoor unit for a long time, adjusting the first condition lowers the standard for the heat pump unit to enter defrost mode, thereby improving the defrosting efficiency of the heat pump unit and avoiding the defect of incomplete defrosting.

[0054] In one embodiment of this application, the number of outdoor units can be two or more, each of which is equipped with a heat pump unit, and the target heat pump unit is included among the two or more heat pump units. To improve the defrosting efficiency of the target heat pump unit on the outdoor unit, the decision on whether the outdoor unit controls the target heat pump unit to enter defrost mode can be determined based on the number of heat pump units in defrost mode among the two or more heat pump units. For example... Figure 4 The diagram shown is a flowchart of a defrosting control method for an outdoor unit according to another embodiment of this application. The order of steps in this flowchart can be changed, and some steps can be omitted, depending on different requirements. The defrosting control method for an outdoor unit provided in this embodiment includes the following steps.

[0055] S40, determine the number of heat pump units in defrost mode among the two or more heat pump units.

[0056] In one embodiment of this application, when a large number of heat pump units are in defrost mode out of two or more heat pump units, it indicates that the current ambient temperature is low, the probability of outdoor unit frost formation is high, and most of the heat pump units in the outdoor units are defrosting the outdoor units. Conversely, when a small number of heat pump units are in defrost mode out of two or more heat pump units, it indicates that the current ambient temperature is high, the probability of outdoor unit frost formation is low, and fewer of the heat pump units in the outdoor units are defrosting the outdoor units. Therefore, the number of heat pump units in defrost mode can be used to determine whether to control the target heat pump unit to enter defrost mode.

[0057] S41, when the number of heat pump units in defrost mode is less than half of the total number of the two or more heat pump units, determine whether the environmental parameters and the system parameters meet the first condition.

[0058] In one embodiment of this application, when the number of heat pump units in defrost mode is less than half of the total number of the two or more heat pump units, it indicates that the ambient temperature of the environment where the two or more outdoor units are located may be low, and the probability of frost formation on the outdoor units is high. Therefore, it is possible to continue to determine whether the environmental parameters and system parameters meet the first condition. The first condition is the same as the detailed description in step S21, and will not be repeated here.

[0059] S42, when the environmental parameters and the system parameters meet the first condition, control the target heat pump unit to enter the defrosting mode.

[0060] In one embodiment of this application, when the environmental and system parameters meet a first condition, it indicates a high probability of frost formation on the outdoor unit. At this time, the heat pump unit can be controlled to enter defrost mode, enabling timely defrosting of the outdoor unit. Specifically, after the outdoor unit controls the heat pump unit to enter defrost mode, the compressor in the outdoor unit delivers refrigerant to the finned heat exchanger, thereby increasing the temperature of the finned heat exchanger and achieving the defrosting effect.

[0061] Please see Figure 5 This is a schematic diagram of an outdoor unit provided in an embodiment of this application. The outdoor unit 1 includes a memory 12 and a processor 13. The memory 12 is used to store computer-readable instructions, and the processor 13 executes the computer-readable instructions stored in the memory to implement the defrosting control method of the outdoor unit described in any of the above embodiments.

[0062] In one embodiment of this application, the outdoor unit 1 further includes a bus and a computer program stored in the memory 12 and executable on the processor 13, such as a defrosting control program for the outdoor unit.

[0063] Figure 5 Only the outdoor unit 1, which has a memory 12 and a processor 13, is shown. Those skilled in the art will understand that... Figure 5 The structure shown does not constitute a limitation on the outdoor unit 1, and may include fewer or more components than shown, or combine certain components, or have different component arrangements.

[0064] Combination Figure 2The memory 12 in the outdoor unit 1 stores a plurality of computer-readable instructions to implement a defrosting control method for the outdoor unit. The processor 13 can execute the plurality of instructions to achieve: acquiring environmental parameters and system parameters of the heat pump unit; determining whether the environmental parameters and the system parameters meet a preset first condition; if yes, controlling the heat pump unit to enter defrosting mode; if no, continuing to determine whether the system parameters and the environmental parameters meet a preset second condition, and adjusting the first condition when the system parameters and the environmental parameters meet the second condition; wherein the adjusted first condition is easier to meet than the original first condition.

[0065] Specifically, the processor 13's implementation method for the above instructions can be found in [reference needed]. Figure 2 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0066] Those skilled in the art will understand that the schematic diagram is merely an example of outdoor unit 1 and does not constitute a limitation on outdoor unit 1. Outdoor unit 1 can be a bus-type structure or a star-type structure. Outdoor unit 1 may also include more or fewer other hardware or software than shown in the diagram, or different component arrangements. For example, outdoor unit 1 may also include input / output devices, network access devices, etc.

[0067] It should be noted that outdoor unit 1 is only an example. Other existing or future electronic products that are applicable to this application should also be included within the scope of protection of this application and are incorporated herein by reference.

[0068] The memory 12 includes at least one type of readable storage medium, which can be non-volatile or volatile. The readable storage medium includes flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the memory 12 can be an internal storage unit of the outdoor unit 1, such as the portable hard drive of the outdoor unit 1. In other embodiments, the memory 12 can be an external storage device of the outdoor unit 1, such as a plug-in portable hard drive, SmartMedia Card (SMC), Secure Digital (SD) card, Flash Card, etc., equipped on the outdoor unit 1. The memory 12 can be used not only to store application software and various types of data installed on the outdoor unit 1, such as the code of the outdoor unit's defrosting control program, but also to temporarily store data that has been output or will be output.

[0069] In some embodiments, the processor 13 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 13 is the control core of the outdoor unit 1, connecting various components of the outdoor unit 1 via various interfaces and lines. It executes programs or modules stored in the memory 12 (e.g., executing the outdoor unit's defrost control program) and calls data stored in the memory 12 to perform various functions of the outdoor unit 1 and process data.

[0070] The processor 13 executes the operating system of the outdoor unit 1 and various installed applications. The processor 13 executes these applications to implement the steps in the above-described embodiments of the defrosting control methods for the various outdoor units, for example... Figure 2 The steps are shown.

[0071] For example, the computer program may be divided into one or more modules / units, which are stored in the memory 12 and executed by the processor 13 to complete this application. The one or more modules / units may be a series of computer-readable instruction segments capable of performing a specific function, which describe the execution process of the computer program in the outdoor unit 1.

[0072] The integrated unit implemented as a software functional module described above can be stored in a computer-readable storage medium. This software functional module, stored in a storage medium, includes several instructions to cause a computer device (which may be a personal computer, computer equipment, or network device, etc.) or processor to execute portions of the outdoor unit defrosting control method described in the various embodiments of this application.

[0073] If the module / unit integrated in outdoor unit 1 is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware devices. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above.

[0074] The computer program includes computer program code, which may be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory, and other memory.

[0075] Furthermore, the computer-readable storage medium may primarily include a stored program area and a stored data area, wherein the stored program area may store the operating system, an application program required for at least one function, etc.; and the stored data area may store data created based on the use of blockchain nodes, etc.

[0076] The bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc. For ease of representation, in... Figure 5 The symbol is represented by only one arrow, but this does not indicate that there is only one bus or one type of bus. The bus is configured to enable communication between the memory 12 and at least one processor 13, etc.

[0077] This application also provides a computer-readable storage medium (not shown) storing computer-readable instructions, which are executed by a processor in an outdoor unit to implement the defrosting control method of the outdoor unit described in any of the above embodiments.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and other division methods may be used in actual implementation.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0081] Furthermore, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices described in the specification may also be implemented by a single unit or device through software or hardware. Terms such as "first," "second," etc., are used to indicate names and do not indicate any specific order.

[0082] 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 it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A defrosting control method for an outdoor unit, characterized in that, The outdoor unit is equipped with a heat pump unit, and the control method includes: The ambient temperature and system parameters of the heat pump unit are obtained according to a preset cycle. The system parameters include the evaporation temperature of the refrigerant in the heat pump unit. The system determines whether the environmental parameters and system parameters meet a preset first condition. If so, it controls the heat pump unit to enter defrost mode. The system parameters also include the inlet water temperature of the heat pump unit. The first condition includes: the ambient temperature is less than a preset first temperature threshold; the duration for which the evaporation temperature is lower than the defrost curve value is greater than or equal to a preset first duration threshold; and the inlet water temperature is higher than a preset second temperature threshold. The defrost curve value is the evaporation temperature corresponding to the ambient temperature on a pre-stored defrost curve, and the pre-stored defrost curve is used to characterize the correspondence between the ambient temperature and the evaporation temperature. If not, then continue to determine whether the system parameters and the environmental parameters meet the preset second condition, and when the system parameters and the environmental parameters meet the second condition, adjust the first condition by adjusting the first duration threshold and / or the defrosting curve; wherein, if the heat pump unit does not defrost the outdoor unit within the preset time and the ambient temperature exceeds the temperature threshold, it is determined that the system parameters and the environmental parameters meet the second condition. The adjusted first condition is easier to satisfy than the original first condition.

2. The defrosting control method for an outdoor unit as described in claim 1, characterized in that, The first condition also includes: The cumulative duration of the outdoor mechanism's thermal operation is greater than or equal to a preset second duration threshold, or The time elapsed between the outdoor unit exiting the previous defrosting mode and the time elapsed is greater than or equal to the third duration threshold.

3. The defrosting control method for an outdoor unit as described in claim 1, characterized in that, The second condition includes the heat pump unit not entering the defrost mode after a preset defrost interval. The step of adjusting the first condition includes: After a preset time interval, the first duration threshold is adjusted to the fourth duration threshold; The fourth duration threshold is less than the first duration threshold.

4. The defrosting control method for an outdoor unit as described in claim 1, characterized in that, The second condition includes: the heat pump unit has not entered the defrost mode after a preset defrost interval and the ambient temperature is greater than a preset third temperature threshold. The step of adjusting the first condition includes: After a preset time interval, the defrosting curve is shifted upwards, and the first duration threshold is adjusted to the fourth duration threshold. The fourth duration threshold is less than the first duration threshold.

5. The defrosting control method for an outdoor unit as described in claim 1, characterized in that, The number of outdoor units is two or more, each outdoor unit is equipped with a heat pump unit, and the two or more heat pump units include a target heat pump unit. The control method further includes: If the number of heat pump units in defrost mode among the two or more heat pump units is less than half of the total number of the two or more heat pump units, and if so, and the environmental parameters and the system parameters meet the first condition, then control the target heat pump unit to enter defrost mode.

6. An outdoor unit, wherein a heat pump unit is provided inside the outdoor unit, the heat pump unit comprising: The compressor is characterized in that the outdoor unit further includes a first sensor, a second sensor, and a controller; The first sensor is used to acquire the ambient temperature and the evaporation temperature of the refrigerant in the heat pump unit according to a preset cycle. The second sensor is installed at the suction port of the compressor and is used to acquire some system parameters of the heat pump unit according to a preset cycle. The some system parameters include the evaporation temperature of the refrigerant in the heat pump unit. The controller is used to connect to the heat pump unit and to determine whether the environmental parameters and the system parameters meet a preset first condition. If yes, the controller controls the heat pump unit to enter the defrosting mode. If no, the controller continues to determine whether the system parameters and the environmental parameters meet a preset second condition, and adjusts the first condition when the system parameters and the environmental parameters meet the second condition. The system parameters also include the inlet water temperature of the heat pump unit. The first condition includes: the ambient temperature is less than a preset first temperature threshold; the duration for which the evaporation temperature is lower than the defrost curve value is greater than or equal to a preset first duration threshold; and the inlet water temperature is higher than a preset second temperature threshold. The defrost curve value is the evaporation temperature corresponding to the ambient temperature on a pre-stored defrost curve, and the pre-stored defrost curve is used to characterize the correspondence between the ambient temperature and the evaporation temperature. The adjustment of the first condition includes: adjusting the first condition by adjusting the first duration threshold and / or the defrosting curve; Wherein, if the heat pump unit fails to defrost the outdoor unit within a preset time and the ambient temperature exceeds a temperature threshold, the system parameters and the environmental parameters are determined to meet the second condition; The adjusted first condition is easier to satisfy than the original first condition.

7. An outdoor unit, comprising a memory, a processor, and computer-readable instructions stored in the memory and executable on the processor, characterized in that, When the processor executes the computer-readable instructions, it implements the defrosting control method for the outdoor unit as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, implement the defrosting control method for the outdoor unit as described in any one of claims 1 to 5.

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