Control method of air conditioner, air conditioner and storage medium

Abstract

The invention discloses a control method of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners, the air conditioner comprises an indoor heat exchanger, a throttling valve and an outdoor heat exchanger which are connected in sequence, and the method comprises the steps that when the air conditioner is in a preset working condition and runs in a defrosting mode, the throttling valve is switched to the outdoor heat exchanger; acquiring operation state parameters of the air conditioner; when the operation state parameters meet the reliable operation conditions of the air conditioner, the throttle valve is controlled to reduce the opening degree; wherein in the preset working condition, the frosting rate of the outdoor heat exchanger is larger than a preset rate, in the defrosting mode, the indoor heat exchanger is in an evaporation state, and in the defrosting mode, the outdoor heat exchanger is in a condensation state. The defrosting time is shortened, and the indoor thermal comfort is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to control methods for air conditioners, air conditioners, and storage media. Background Technology

[0002] When an air conditioner is in heating mode in a low-temperature environment, the outdoor heat exchanger, which is in an evaporating state, is prone to frost formation, which affects the heating performance of the air conditioner. After the air conditioner has been running in heating mode for a period of time, it needs to enter defrosting mode to defrost the outdoor heat exchanger.

[0003] Currently, regardless of the severity of the frosting conditions on the outdoor heat exchanger, air conditioners generally operate according to pre-set defrosting parameters after entering defrosting mode. This can easily lead to long defrosting times in severe frosting conditions, reducing indoor thermal comfort. Summary of the Invention

[0004] The main objective of this application is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to shorten defrosting time and improve indoor thermal comfort.

[0005] To achieve the above objectives, this application proposes a control method for an air conditioner, the air conditioner comprising an indoor heat exchanger, a throttling valve, and an outdoor heat exchanger connected in sequence, the method comprising:

[0006] When the air conditioner is in a preset operating condition and running defrost mode, the operating status parameters of the air conditioner are obtained;

[0007] When the operating status parameters meet the reliable operating conditions of the air conditioner, the throttle valve is controlled to reduce its opening.

[0008] In the preset operating condition, the frosting rate of the outdoor heat exchanger is greater than the preset rate, and in the defrosting mode, the indoor heat exchanger is in an evaporation state and the outdoor heat exchanger is in a condensation state.

[0009] In one embodiment, the operating status parameters include the temperature of the indoor heat exchanger, and the reliable operating conditions include the temperature of the indoor heat exchanger being greater than the pour point temperature of the compressor oil in the air conditioner.

[0010] In one embodiment, the step of obtaining the operating status parameters of the air conditioner includes:

[0011] The lowest temperature of the indoor heat exchanger within the first time period after the defrosting mode is started is obtained, and the operating status parameters include the lowest temperature.

[0012] In one embodiment, after the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes:

[0013] When the operating status parameters do not meet the reliable operating conditions, the throttle valve is controlled to maintain its current opening.

[0014] In one embodiment, after the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes:

[0015] When the air conditioner meets the first exit condition or the second exit condition of the defrosting mode, the air conditioner is controlled to exit the defrosting mode.

[0016] The first exit condition includes the outdoor heat exchanger's temperature being greater than a first temperature threshold for a second duration; the second exit condition includes the outdoor heat exchanger's temperature being greater than a second temperature threshold, and the second temperature threshold being greater than the first temperature threshold.

[0017] In one embodiment, after the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes:

[0018] Get the number of consecutive times the air conditioner exited the defrost mode when the first exit condition was met before the current time.

[0019] If the number of consecutive occurrences is greater than or equal to the preset number, and the air conditioner meets the second exit condition of the defrosting mode, the air conditioner is controlled to exit the defrosting mode.

[0020] When the number of consecutive steps is less than or equal to the preset number of steps, and when the air conditioner meets the first exit condition or the second exit condition, the air conditioner is controlled to exit the defrosting mode.

[0021] In one embodiment, before the step of obtaining the operating status parameters of the air conditioner, the method further includes:

[0022] Control the air conditioner to operate in heating mode, and obtain the outdoor environmental parameters of the environment where the air conditioner is located and the temperature change parameters of the outdoor heat exchanger;

[0023] The air conditioner is determined to be in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters.

[0024] In one embodiment, the outdoor environmental parameters include the outdoor ambient temperature, and the temperature change parameters include the temperature change rate. The step of determining whether the air conditioner is in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters includes:

[0025] When the outdoor ambient temperature is within a preset temperature range and the rate of temperature change is greater than a preset rate of change, the air conditioner is determined to be in the preset operating condition.

[0026] The preset temperature range indicates that the outdoor air is in a state of high humidity.

[0027] In one embodiment, the method further includes:

[0028] Obtain the outdoor ambient temperature of the environment where the air conditioner is located;

[0029] The initial opening degree of the throttle valve is determined based on the outdoor ambient temperature.

[0030] Before the step of obtaining the operating status parameters of the air conditioner, the method further includes:

[0031] When the air conditioner starts the defrosting mode, the throttle valve is controlled to operate at the initial opening.

[0032] In addition, to achieve the above objectives, this application also proposes an air conditioner, which includes a control device, an indoor heat exchanger, a throttling valve, and an outdoor heat exchanger connected in sequence. The throttling valve is connected to the control device. The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the control method for the air conditioner as described above.

[0033] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the air conditioner control method described above.

[0034] One or more technical solutions proposed in this application have at least the following technical effects: When the outdoor heat exchanger is in a rapid frosting condition, the opening of the throttle valve of the air conditioner is no longer fixed during the defrosting process. When the system is determined to be in a reliable operating state by the operating status parameters, the opening of the throttle valve is reduced, which can effectively increase the exhaust temperature of the compressor. The temperature of the refrigerant flowing into the outdoor heat exchanger for defrosting is effectively increased, and the defrosting heat is effectively increased, thereby effectively shortening the defrosting time and improving indoor thermal comfort. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the equipment structure of the hardware operating environment involved in the control method of the air conditioner in this application embodiment;

[0038] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to this application.

[0039] Figure 3 This is a flowchart illustrating Embodiment 2 of the control method for the air conditioner of this application;

[0040] Figure 4 This is a flowchart illustrating the control method for the air conditioner in Embodiment 3 of this application.

[0041] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0043] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The main solution of this application embodiment is: a control method based on an air conditioner, the air conditioner including an indoor heat exchanger, a throttling valve and an outdoor heat exchanger connected in sequence, the method including: when the air conditioner is in a preset operating condition and running defrost mode, acquiring the operating status parameters of the air conditioner; when the operating status parameters meet the reliable operating conditions of the air conditioner, controlling the throttling valve to reduce its opening; wherein, in the preset operating condition, the frosting rate of the outdoor heat exchanger is greater than a preset rate, and in the defrost mode, the indoor heat exchanger is in an evaporation state and the outdoor heat exchanger is in a condensation state.

[0045] In this embodiment, for ease of description, the following description uses an air conditioner as the subject of execution.

[0046] In existing technology, regardless of the severity of the frosting conditions of the outdoor heat exchanger, the air conditioner generally operates according to the preset defrosting parameters after entering defrosting mode. This can easily lead to a long defrosting time in severe frosting conditions, reducing indoor thermal comfort.

[0047] This application provides the above solution. When the outdoor heat exchanger is in a rapid frosting condition, the opening of the throttle valve of the air conditioner is no longer fixed during the defrosting process. When the system is determined to be in a reliable operating state by the operating status parameters, the opening of the throttle valve is reduced, which can effectively increase the exhaust temperature of the compressor. The temperature of the refrigerant flowing into the outdoor heat exchanger for defrosting is effectively increased, and the defrosting heat is effectively increased, thereby effectively shortening the defrosting time and improving indoor thermal comfort.

[0048] This application provides an air conditioner. The air conditioner may include any type such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling-mounted air conditioner, or a multi-split air conditioner.

[0049] In this embodiment, refer to Figure 1 The air conditioner includes a control device 100 and a refrigerant circulation loop. The refrigerant circulation loop includes a compressor 1, a reversing assembly 2, and an indoor heat exchanger, a throttle valve 3, and an outdoor heat exchanger connected in sequence. The exhaust port of the compressor 1, the return port of the compressor 1, the indoor heat exchanger, and the outdoor heat exchanger are all connected to the reversing assembly 2.

[0050] The reversing assembly 2 (e.g., a four-way valve) has a first operating state and a second operating state. When the reversing assembly 2 is in the first operating state, the exhaust port of the compressor 1 is connected to the indoor heat exchanger and the exhaust port of the compressor 1 is connected to the outdoor heat exchanger. When the reversing assembly 2 is in the second operating state, the exhaust port of the compressor 1 is connected to the outdoor heat exchanger and the return port of the compressor 1 is connected to the indoor heat exchanger.

[0051] With the cooperation of the above components, the air conditioner includes at least the following operating modes:

[0052] In heating mode, the reversing assembly 2 operates in the first operating state, the throttle valve 3 operates at the throttle opening, and the refrigerant discharged by the compressor 1 flows through the indoor heat exchanger, the throttle valve 3, and the outdoor heat exchanger in sequence before returning to the compressor 1. The indoor heat exchanger is in a condensing state, and the outdoor heat exchanger is in an evaporating state. The indoor heat exchanger releases heat to the indoor space to raise the indoor air temperature.

[0053] In cooling mode, the reversing assembly 2 operates in the second operating state, the throttle valve 3 operates at the throttle opening, and the refrigerant discharged by the compressor 1 flows sequentially through the outdoor heat exchanger, the throttle valve 3, and the indoor heat exchanger before returning to the compressor 1. The indoor heat exchanger is in the evaporation state, the outdoor heat exchanger is in the condensation state, and the indoor heat exchanger releases cooling energy into the indoor space to lower the indoor air temperature.

[0054] In defrosting mode, the reversing assembly 2 operates in the second operating state, the throttle valve 3 operates at the throttle opening, and the refrigerant discharged by the compressor 1 flows sequentially through the outdoor heat exchanger, the throttle valve 3, and the indoor heat exchanger before returning to the compressor 1. The indoor heat exchanger is in an evaporating state, and the outdoor heat exchanger is in a condensing state. The outdoor heat exchanger releases heat to melt the frost on its surface and in the space it is in.

[0055] The air conditioner also includes a first temperature sensor 01, which is located in the indoor heat exchanger to detect the temperature of the indoor heat exchanger. In this embodiment, the first temperature sensor 01 may be located at the refrigerant outlet of the coil in the indoor heat exchanger or in the middle of the coil.

[0056] The air conditioner also includes a second temperature sensor 02, which is located in the outdoor heat exchanger to detect the temperature of the outdoor heat exchanger. In this embodiment, the second temperature sensor 02 may be located at the refrigerant outlet of the coil in the outdoor heat exchanger.

[0057] The air conditioner also includes an environmental detection module 03, which is located in the outdoor environment where the air conditioner is located, to detect outdoor environmental parameters (such as outdoor temperature, outdoor humidity, outdoor enthalpy, etc., at least one).

[0058] Reference Figure 1 The air conditioner also includes a control device 100, and the aforementioned throttle valve 3, compressor 1, reversing assembly 2, first temperature sensor 01, second temperature sensor 02 and environmental detection module 03 are all connected to the control device 100.

[0059] The control device 100 includes: at least one processor 1001; and a memory 1002 communicatively connected to the at least one processor 1001, and a timer 1003, etc.; wherein the memory 1002 stores instructions that can be executed by the at least one processor 1001, the instructions being executed by the at least one processor 1001 to enable the at least one processor 1001 to perform the air conditioner control method in the following embodiment.

[0060] The following is for reference. Figure 1 The diagram illustrates a structural schematic of a control device 100 suitable for implementing embodiments of this application. The air conditioner in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 1 The control device 100 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0061] like Figure 1 As shown, the control device 100 may include a processor 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in memory 1002. The program in memory 1002 may be a program in read-only memory (ROM) or a program loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device 100. The processor 1001 and memory 1002 (ROM and RAM) are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices including, for example, magnetic tapes, hard disks, etc.; and communication devices. The communication device allows the control device 100 to communicate wirelessly or wiredly with other devices to exchange data. Although the control unit 100 with various systems is shown in the figure, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented or have alternatively.

[0062] Specifically, according to the embodiments disclosed in this application, the method flow described in the following embodiments can be implemented as a computer software program. For example, the embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from memory 1002. When the computer program is executed by processor 1001, it performs the functions defined in the control method of the air conditioner of the embodiments disclosed in this application.

[0063] The air conditioner provided in this application, employing the control method of the air conditioner in the following embodiments, can solve the technical problem of how to shorten defrosting time and improve indoor thermal comfort. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as those of the control method of the air conditioner provided in the following embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the following embodiments, and will not be repeated here.

[0064] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or air conditioner capable of performing the above functions. The following description uses an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0065] Based on this, the embodiments of this application provide a control method for an air conditioner, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the control method for the air conditioner of this application.

[0066] In this embodiment, the control method of the air conditioner includes steps S10 to S20:

[0067] Step S10: When the air conditioner is in a preset operating condition and running defrosting mode, obtain the operating status parameters of the air conditioner. In the preset operating condition, the frosting rate of the outdoor heat exchanger is greater than the preset rate. In the defrosting mode, the indoor heat exchanger is in an evaporating state and the outdoor heat exchanger is in a condensing state.

[0068] A frosting rate greater than the preset rate indicates that the outdoor heat exchanger is in a rapid frosting state. Whether the air conditioner is in the preset operating condition can be determined by obtaining the environmental state parameters of the environment where the air conditioner is located and / or the operating state parameters of the air conditioner itself, or by obtaining the state commands input by the user, or by counting the number of times the air conditioner enters defrosting mode within a preset time period.

[0069] The defrosting mode is the operating mode for defrosting the outdoor heat exchanger. In the defrosting mode, the reversing assembly operates in the second operating state, the throttle valve operates at the throttle opening, and the refrigerant discharged from the compressor flows sequentially through the outdoor heat exchanger, the throttle valve, and the indoor heat exchanger before returning to the compressor. The indoor heat exchanger is in an evaporating state, and the outdoor heat exchanger is in a condensing state. The outdoor heat exchanger releases heat to melt the frost on its surface and in the space it occupies.

[0070] When the air conditioner is in preset operating conditions and running in heating mode, it can be determined whether the air conditioner meets the start conditions for defrosting mode. If the start conditions are met, the air conditioner can be controlled to switch from heating mode to defrosting mode (the commutator switches from the first operating state to the second operating state). If the start conditions are not met, the air conditioner can be controlled to maintain operation in heating mode. The start conditions are the conditions that the air conditioner's own operating parameters and / or the environmental parameters of the environment in which the air conditioner is located must meet when the outdoor heat exchanger's frost affects the air conditioner's heating performance. Start conditions may include an outdoor ambient temperature lower than a first preset temperature and / or an outdoor heat exchanger temperature lower than a second preset temperature. In defrosting mode, both the indoor fan corresponding to the indoor heat exchanger and the outdoor fan corresponding to the outdoor heat exchanger are in a stopped state.

[0071] Operating status parameters are reliability-related status parameters detected during the operation of the air conditioner. Operating status parameters may include, but are not limited to, at least one of the following: indoor heat exchanger temperature, compressor return gas temperature, compressor return gas pressure, compressor discharge temperature, compressor discharge pressure, compressor oil level, etc. In this embodiment, operating status parameters include parameters related to the compressor's oil return volume.

[0072] Step S20: When the operating status parameters meet the reliable operating conditions of the air conditioner, control the throttle valve to reduce its opening.

[0073] Reliable operating conditions may include the target parameter range that the air conditioner needs to achieve when it is in a reliable operating state, or the target relationship between the operating state parameters and the preset parameter thresholds.

[0074] The opening adjustment parameters during the throttle valve reduction process can be preset fixed parameters, or parameters determined based on the actual operating conditions of the air conditioner, and so on. For example, the opening adjustment parameters can be determined based on the relationship between the operating status parameters and the target parameter range required for reliable operation of the air conditioner, and / or the temperature of the outdoor heat exchanger and / or the operating frequency of the compressor.

[0075] In this embodiment, after the throttle valve reduces its opening, it maintains the reduced opening until the air conditioner meets the exit conditions for defrosting mode.

[0076] This embodiment provides a control method for an air conditioner. In this scheme, when the outdoor heat exchanger is in a rapid frosting condition, the opening of the throttle valve is no longer fixed during the defrosting process. When the system is determined to be in a reliable operating state by the operating status parameters, the opening of the throttle valve is reduced, which can effectively increase the exhaust temperature of the compressor. The temperature of the refrigerant flowing into the outdoor heat exchanger for defrosting is effectively increased, and the defrosting heat is effectively enhanced, thereby effectively shortening the defrosting time and improving indoor thermal comfort.

[0077] In this embodiment, after step S10, the method further includes: when the operating status parameters do not meet the reliable operating conditions, controlling the throttle valve to maintain the current opening.

[0078] The throttle valve here can maintain the current opening until the exit conditions for defrosting mode are met.

[0079] In this embodiment, the reliability of the air conditioner's operation in defrosting mode can be guaranteed by this method.

[0080] In other embodiments, after step S10, when the operating status parameters do not meet the reliable operating conditions, the throttle valve can be controlled to maintain its current opening or increase its opening based on the operating status parameters. Specifically, when the operating status parameters meet the high reliability risk conditions, the throttle valve can be controlled to increase its opening; when the operating status parameters meet the low reliability risk conditions, the throttle valve can be controlled to maintain its current opening.

[0081] In one feasible implementation, the operating status parameters include the temperature of the indoor heat exchanger, and the reliable operating conditions include the temperature of the indoor heat exchanger being greater than the pour point temperature of the compressor oil in the air conditioner.

[0082] The temperature of the indoor heat exchanger can be detected by the first temperature sensor mentioned above.

[0083] Compressor oil is the lubricating oil used to cool and lubricate the compressor during operation. Compressor oil can mix with the refrigerant in the refrigerant circulation loop and participate in the circulation together. The mixing state of the compressor oil and refrigerant varies depending on the system's operating conditions.

[0084] When the temperature of the indoor heat exchanger is higher than the pour point temperature, it can be assumed that the compressor oil is not likely to accumulate in the indoor heat exchanger, the compressor oil return is sufficient, and the air conditioner is in a reliable operating state. When the temperature of the indoor heat exchanger is lower than or equal to the pour point temperature, the compressor oil is likely to accumulate in the indoor heat exchanger, the compressor oil return is insufficient, the air conditioner has poor operating reliability, and reliability problems are likely to occur.

[0085] In this embodiment, the opening adjustment parameters can be determined based on the temperature difference between the indoor heat exchanger and the pour point temperature, and / or the temperature of the outdoor heat exchanger, and / or the operating frequency of the compressor, etc.

[0086] In this embodiment, by ensuring sufficient oil return from the compressor, the throttle valve opening is reduced to increase the defrosting heat of the outdoor heat exchanger, thereby ensuring reliable operation of the air conditioner while effectively improving defrosting efficiency.

[0087] In one feasible implementation, the step of obtaining the operating status parameters of the air conditioner includes: obtaining the lowest temperature of the indoor heat exchanger within a first time period after the defrosting mode is started, wherein the operating status parameters include the lowest temperature.

[0088] After the air conditioner starts defrosting mode, the temperature of the indoor heat exchanger will first decrease, then increase, and finally reach a stable state. During the first period, the temperature of the indoor heat exchanger is in a decreasing state. The first period is a preset fixed duration, or it can be determined according to the actual operating conditions of the air conditioner. For example, after starting defrosting mode, the temperature change trend of the indoor heat exchanger can be monitored, and the moment when the temperature change trend changes from a decreasing trend to an increasing trend can be considered the end of the first period.

[0089] After the defrosting mode is activated, the temperature of the indoor heat exchanger is detected every first time interval within the first time interval. Here, the first time interval is less than the first time interval. At least two indoor heat exchanger temperatures are obtained, and the minimum value among the at least two indoor heat exchanger temperatures is taken as the lowest temperature here.

[0090] In this embodiment, the above method helps to accurately determine the reliability risk of the air conditioner throughout the defrosting process, ensuring that the air conditioner can operate reliably throughout the defrosting process after the throttle valve reduces its opening. This improves the defrosting efficiency of the air conditioner while further enhancing its operational reliability.

[0091] In other embodiments, the average temperature of the indoor heat exchanger during the first hour after the defrosting mode is started can also be used as the operating status parameter.

[0092] Based on any of the above embodiments, in the second embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 After step S10, the following steps are also included:

[0093] Step S30: When the air conditioner meets the first exit condition or the second exit condition of the defrosting mode, control the air conditioner to exit the defrosting mode.

[0094] The first exit condition includes the outdoor heat exchanger's temperature being greater than a first temperature threshold for a second duration; the second exit condition includes the outdoor heat exchanger's temperature being greater than a second temperature threshold, and the second temperature threshold being greater than the first temperature threshold.

[0095] During the operation of the throttle valve at a reduced opening after step S20 or during the operation of the throttle valve at the current opening after step S10, it can be determined whether the air conditioner meets the first exit condition or the second exit condition. When the air conditioner meets one of the first exit condition or the second exit condition, the air conditioner can be controlled to exit the defrosting mode.

[0096] The first temperature threshold can be the frosting temperature, such as 0°C.

[0097] The second duration can be a preset fixed value, or it can be a value determined according to the actual operating conditions of the air conditioner. For example, the second duration can be determined based on outdoor environmental parameters (outdoor temperature and / or outdoor humidity, etc.).

[0098] Exiting defrost mode for an air conditioner can include resuming it in heating mode.

[0099] In this embodiment, when the air conditioner meets the first exit condition, it can be considered that the outdoor heat exchanger has defrosted completely. When the air conditioner meets the second exit condition, it can be considered that the outdoor heat exchanger has defrosted completely and the defrosting water in the chassis located at the bottom of the outdoor heat exchanger has fully evaporated. Based on this, when the air conditioner meets either the first or the second exit condition, the air conditioner exits the defrosting mode, which helps to ensure that heating is restored in time when defrosting is completed, and can effectively ensure indoor heating comfort.

[0100] In one feasible implementation of this embodiment, after step S10, the method may further include: obtaining the number of consecutive times the air conditioner exits the defrosting mode when it meets the first exit condition before the current time; if the number of consecutive times is greater than or equal to a preset number, controlling the air conditioner to exit the defrosting mode when the air conditioner meets the second exit condition of the defrosting mode; if the number of consecutive times is less than or equal to the preset number, controlling the air conditioner to exit the defrosting mode when the air conditioner meets either the first exit condition or the second exit condition.

[0101] The preset number of cycles is a critical value used to distinguish whether there is a risk of water accumulation or frost blockage on the chassis at the bottom of the outdoor heat exchanger. The preset number of cycles can be a fixed parameter set in advance, or it can be a parameter determined according to the actual operating conditions of the air conditioner, such as the preset number of cycles determined according to outdoor environmental parameters.

[0102] In this embodiment, if the number of consecutive defrost cycles is greater than or equal to a preset number, it can be considered that there is a risk of water accumulation or frost blockage in the chassis. At this time, the air conditioner will exit the defrost mode only when the second exit condition is met. If the air conditioner does not meet the second exit condition, it will continue to run in the defrost mode and will not trigger the exit of the defrost mode through the first exit condition. This helps to ensure that the outdoor heat exchanger is defrosted cleanly while the moisture in the chassis is fully evaporated, so as to ensure the defrosting effect and avoid the air conditioner from malfunctioning due to water accumulation or frost blockage in the chassis. If the number of consecutive defrost cycles is less than the preset number, it can be considered that there is a risk of water accumulation or frost blockage in the chassis. At this time, the air conditioner can exit the defrost mode when either the first exit condition or the second exit condition is met. This can ensure that the outdoor heat exchanger temperature can exit the defrost mode even if it does not reach a very high temperature. This helps to ensure the timely exit of the defrost mode of the air conditioner, thereby further shortening the defrost time and improving indoor thermal comfort.

[0103] Based on any of the above embodiments, in the third embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4 Before the step of obtaining the operating status parameters of the air conditioner, the method further includes:

[0104] Step S01: Control the air conditioner to operate in heating mode, and obtain the outdoor environmental parameters of the environment where the air conditioner is located and the temperature change parameters of the outdoor heat exchanger.

[0105] Outdoor environmental parameters may include at least one of the following: outdoor humidity, outdoor moisture content, outdoor temperature, outdoor enthalpy, etc.

[0106] Temperature change parameters represent the temperature change status of an outdoor heat exchanger. These parameters may include the rate of temperature change, the magnitude of temperature change, and the trend of temperature change, among others.

[0107] Step S02: Determine whether the air conditioner is in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters.

[0108] In one implementation, a first target parameter range corresponding to the outdoor environmental parameters and a second target parameter range corresponding to the temperature change parameters can be preset under a preset operating condition. Based on this, if the outdoor environmental parameters are within the first target parameter range and the temperature change parameters are within the second target parameter range, the air conditioner can be considered to be in the preset operating condition; if at least one of the outdoor environmental parameters and the temperature change parameters is not within the corresponding target parameter range, the air conditioner can be considered not to be in the preset operating condition.

[0109] In another implementation, a third target parameter range corresponding to the operating condition parameters under a preset operating condition is pre-set. Based on this, the operating condition parameters can be calculated using outdoor environmental parameters and temperature change parameters. If the operating condition parameters are within the third target parameter range, the air conditioner can be considered to be in the preset operating condition; if the operating condition parameters are outside the third target parameter range, the air conditioner can be considered not to be in the preset operating condition.

[0110] In this embodiment, the above method can automatically and accurately identify whether the outdoor heat exchanger is in a severe frosting scenario, ensuring that the air conditioner can use the matching defrosting logic to defrost in a severe frosting scenario, effectively shortening the defrosting time, effectively improving the defrosting cleanliness, avoiding frequent defrosting, and further improving indoor heating comfort.

[0111] In one feasible implementation of this embodiment, the outdoor environmental parameters include the outdoor ambient temperature, the temperature change parameters include the temperature change rate, and the step of determining whether the air conditioner is in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters includes: when the outdoor ambient temperature is within a preset temperature range and the temperature change rate is greater than a preset change rate, determining that the air conditioner is in the preset operating condition; wherein, the preset temperature range indicates that the outdoor air is in a high humidity state.

[0112] The preset temperature range includes the frosting temperature (e.g., 0℃). The deviation between the critical value of the preset temperature range and the frosting temperature is less than or equal to the preset value. For example, the preset temperature range is [-4℃, 4℃].

[0113] During the operation of the air conditioner in heating mode, the outdoor environmental parameters and temperature change rate are detected at set intervals, and the air conditioner is determined to be in the preset operating condition based on the outdoor environmental parameters and temperature change rate.

[0114] In this embodiment, when the outdoor ambient temperature and temperature change rate meet the above conditions, the outdoor heat exchanger can be considered to be in a frequent frosting condition. The frost layer adheres to the outdoor heat exchanger quickly, the adhesion time is short, and the defrosting action is frequent. Based on this, the above method can accurately identify whether the air conditioner is in the preset condition, which is conducive to improving the accuracy of defrosting control, thereby further ensuring the defrosting effect and improving indoor thermal comfort.

[0115] Based on any of the above embodiments, in the third embodiment of this application, the same or similar content as the above embodiments can be referred to the above description, and will not be repeated hereafter. In addition, the method further includes: obtaining the outdoor ambient temperature of the environment where the air conditioner is located; determining the initial opening degree of the throttle valve based on the outdoor ambient temperature; before the step of obtaining the operating status parameters of the air conditioner, the method further includes: controlling the throttle valve to operate at the initial opening degree when the air conditioner starts the defrosting mode.

[0116] Different outdoor ambient temperatures correspond to different initial opening degrees. The initial opening degree can be determined by identifying the temperature range in which the outdoor ambient temperature falls, or by substituting the outdoor ambient temperature into the formula to calculate the initial opening degree.

[0117] During the operation of the throttle valve at its initial opening, the operating status parameters of the air conditioner are obtained.

[0118] In cases where the air conditioner is not in a preset operating condition and the defrosting mode is activated, the throttle valve can maintain its initial opening until the air conditioner meets the exit conditions for the defrosting mode.

[0119] In this embodiment, determining the initial opening of the throttle valve during the defrosting mode startup phase based on the outdoor ambient temperature helps ensure the defrosting effect of the outdoor heat exchanger during the defrosting startup phase. On this basis, when the outdoor heat exchanger is in a rapid frosting state, the throttle valve opening can be reduced by determining the air conditioner's reliable operation through the air conditioner's operating status parameters, thereby further increasing the defrosting heat of the outdoor heat exchanger. This ensures that the defrosting efficiency can be effectively improved under severe frosting scenarios, thereby further improving indoor heating comfort.

[0120] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the air conditioner in this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0121] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the air conditioner control method of the above embodiments.

[0122] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0123] The aforementioned computer-readable storage medium may be included in the air conditioner; or it may exist independently and not be installed in the air conditioner.

[0124] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the air conditioner, cause the air conditioner to perform the following process: when the air conditioner is in a preset operating condition and running defrost mode, acquire the operating status parameters of the air conditioner; when the operating status parameters meet the reliable operating conditions of the air conditioner, control the throttle valve to reduce its opening; wherein, in the preset operating condition, the frosting rate of the outdoor heat exchanger is greater than a preset rate, and in the defrost mode, the indoor heat exchanger is in an evaporating state and the outdoor heat exchanger is in a condensing state.

[0125] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0126] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the air conditioner described above. This program can solve the technical problem of how to shorten defrosting time and improve indoor thermal comfort. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the control method of the air conditioner provided in the above embodiments, and will not be repeated here.

[0127] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0128] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. Modules described in the embodiments of this application can be implemented in software or hardware. The names of modules do not necessarily limit the specific unit itself. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0129] The above descriptions are merely some embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the content of this specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application. Therefore, the protection scope of this application should be determined by the scope of the claims.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes an indoor heat exchanger, a throttling valve, and an outdoor heat exchanger connected in sequence, and the method includes: When the air conditioner is in a preset operating condition and running defrost mode, the operating status parameters of the air conditioner are obtained; When the operating status parameters meet the reliable operating conditions of the air conditioner, the throttle valve is controlled to reduce its opening. In the preset operating condition, the frosting rate of the outdoor heat exchanger is greater than the preset rate, and in the defrosting mode, the indoor heat exchanger is in an evaporation state and the outdoor heat exchanger is in a condensation state.

2. The method as described in claim 1, characterized in that, The operating status parameters include the temperature of the indoor heat exchanger, and the reliable operating conditions include the temperature of the indoor heat exchanger being greater than the pour point temperature of the compressor oil in the air conditioner.

3. The method as described in claim 2, characterized in that, The steps for obtaining the operating status parameters of the air conditioner include: The lowest temperature of the indoor heat exchanger within the first time period after the defrosting mode is started is obtained, and the operating status parameters include the lowest temperature.

4. The method as described in claim 1, characterized in that, After the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes: When the operating status parameters do not meet the reliable operating conditions, the throttle valve is controlled to maintain its current opening.

5. The method as described in claim 1, characterized in that, After the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes: When the air conditioner meets the first exit condition or the second exit condition of the defrosting mode, the air conditioner is controlled to exit the defrosting mode. The first exit condition includes the outdoor heat exchanger's temperature being greater than a first temperature threshold for a second duration; the second exit condition includes the outdoor heat exchanger's temperature being greater than a second temperature threshold, and the second temperature threshold being greater than the first temperature threshold.

6. The method as described in claim 5, characterized in that, After the step of obtaining the operating status parameters of the air conditioner when the air conditioner is in a preset operating condition and running defrost mode, the method further includes: Get the number of consecutive times the air conditioner exited the defrost mode when the first exit condition was met before the current time. If the number of consecutive occurrences is greater than or equal to the preset number, and the air conditioner meets the second exit condition of the defrosting mode, the air conditioner is controlled to exit the defrosting mode. When the number of consecutive steps is less than or equal to the preset number of steps, and when the air conditioner meets the first exit condition or the second exit condition, the air conditioner is controlled to exit the defrosting mode.

7. The method according to any one of claims 1 to 6, characterized in that, Before the step of obtaining the operating status parameters of the air conditioner, the method further includes: Control the air conditioner to operate in heating mode, and obtain the outdoor environmental parameters of the environment where the air conditioner is located and the temperature change parameters of the outdoor heat exchanger; The air conditioner is determined to be in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters.

8. The method as described in claim 7, characterized in that, The outdoor environmental parameters include the outdoor ambient temperature, and the temperature change parameters include the temperature change rate. The step of determining whether the air conditioner is in the preset operating condition based on the outdoor environmental parameters and the temperature change parameters includes: When the outdoor ambient temperature is within a preset temperature range and the rate of temperature change is greater than a preset rate of change, the air conditioner is determined to be in the preset operating condition. The preset temperature range indicates that the outdoor air is in a state of high humidity.

9. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Obtain the outdoor ambient temperature of the environment where the air conditioner is located; The initial opening degree of the throttle valve is determined based on the outdoor ambient temperature. Before the step of obtaining the operating status parameters of the air conditioner, the method further includes: When the air conditioner starts the defrosting mode, the throttle valve is controlled to operate at the initial opening.

10. An air conditioner, characterized in that, The air conditioner includes a control device, an indoor heat exchanger, a throttling valve, and an outdoor heat exchanger connected in sequence. The throttling valve is connected to the control device. The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the control method for the air conditioner as described in any one of claims 1 to 9.

11. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the control method for the air conditioner as described in any one of claims 1 to 9.

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