Determination method, device, electronic device and storage medium for defrost mode

Abstract

The present disclosure provides a method, device, electronic device, and storage medium for determining a defrost mode, relating to the field of air conditioning technology. The method comprises: obtaining an indoor ambient temperature and an outdoor ambient temperature; obtaining the current operating frequency of the air conditioner and the measured opening of the expansion valve when the indoor ambient temperature and the outdoor ambient temperature meet preset conditions; determining a reference opening of the expansion valve based on the operating frequency and the outdoor ambient temperature; and determining a defrost mode based on a relationship between the difference between the measured opening and the reference opening and a first threshold. Thus, when the air conditioner requires defrosting, the degree of fluorine deficiency can be determined based on the difference between the reference opening and the measured opening of the expansion valve, and the defrost mode of the air conditioner can be determined based on the degree of fluorine deficiency. This allows the air conditioner to select a suitable defrost mode for defrosting, thereby improving the reliability of defrosting.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to a method, device, electronic device, and storage medium for determining a defrost mode. Background Art

[0002] With the development of the times and the advancement of technology, people have higher and higher requirements for home appliances. In order to improve the comfort of air-conditioning products under low-temperature heating conditions, some air-conditioning products use hot gas defrosting for defrosting.

[0003] Compared to conventional defrosting, hot gas defrosting does not reverse the refrigerant flow direction during defrosting. The high-temperature refrigerant enters the indoor unit first (with the indoor fan stopped to reduce heat dissipation) before entering the outdoor unit for defrosting. As a result, the indoor unit's heat exchanger temperature is higher, and no heat is absorbed from the room, resulting in better heating comfort. However, since the high-temperature refrigerant enters the indoor unit first, there will still be a certain amount of heat loss, resulting in insufficient defrosting heat. Especially when the system is low on fluorine, the refrigerant circulation volume is insufficient, and the heat carried is limited, seriously affecting the reliability of hot gas defrosting. Summary of the Invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] The first embodiment of the present disclosure provides a method for determining a defrost mode, comprising:

[0006] Get indoor and outdoor ambient temperatures;

[0007] When the indoor ambient temperature and the outdoor ambient temperature meet preset conditions, obtaining the current operating frequency of the air conditioner and the measured opening of the expansion valve;

[0008] determining a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature;

[0009] The defrost mode is determined according to a relationship between a difference between the measured opening degree and the reference opening degree and a first threshold value.

[0010] A second embodiment of the present disclosure provides a device for determining a defrost mode, comprising:

[0011] The first acquisition module is used to obtain the indoor ambient temperature and the outdoor ambient temperature;

[0012] A second acquisition module is configured to acquire the current operating frequency of the air conditioner and the measured opening of the expansion valve when the indoor ambient temperature and the outdoor ambient temperature meet preset conditions;

[0013] a first determining module, configured to determine a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature;

[0014] The second determining module is configured to determine a defrost mode according to a relationship between a difference between the measured opening and the reference opening and a first threshold.

[0015] The third aspect embodiment of the present disclosure proposes an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for determining the defrost mode proposed in the first aspect embodiment of the present disclosure is implemented.

[0016] The fourth embodiment of the present disclosure provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for determining the defrost mode provided in the first embodiment of the present disclosure is implemented.

[0017] The defrost mode determination method, device, electronic device, and storage medium provided by the present disclosure have the following beneficial effects:

[0018] In the disclosed embodiment, the indoor and outdoor ambient temperatures can be first obtained. Then, when the indoor and outdoor ambient temperatures meet preset conditions, the current operating frequency of the air conditioner and the measured opening of the expansion valve are obtained. A reference opening of the expansion valve is then determined based on the operating frequency and the outdoor ambient temperature. Finally, a defrost mode is determined based on the relationship between the difference between the measured and reference openings and a first threshold. Thus, when the air conditioner requires defrost, the degree of fluorine deficiency can be determined based on the difference between the reference and measured openings of the expansion valve. The defrost mode of the air conditioner can then be determined based on the degree of fluorine deficiency. This allows the air conditioner to select an appropriate defrost mode for defrosting, thereby improving defrost reliability.

[0019] Additional aspects and advantages of the present disclosure will be given in part in the description below and in part will be obvious from the description below, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 A schematic flow chart of a method for determining a defrost mode provided in one embodiment of the present disclosure;

[0022] Figure 2 A schematic flow chart of a method for determining a defrost mode provided by another embodiment of the present disclosure;

[0023] Figure 3 A schematic flow chart of a method for determining a defrost mode provided by another embodiment of the present disclosure;

[0024] Figure 4 A schematic structural diagram of a device for determining a defrost mode according to an embodiment of the present disclosure;

[0025] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0027] The following describes a method, device, electronic device, and storage medium for determining a defrost mode according to embodiments of the present disclosure with reference to the accompanying drawings.

[0028] Figure 1 A flowchart of a method for determining a defrost mode provided in an embodiment of the present disclosure is provided.

[0029] The embodiment of the present disclosure takes the method for determining the defrost mode as an example in which the method is configured in a device for determining the defrost mode. The device for determining the defrost mode can be applied to any electronic device so that the electronic device can perform the function of determining the defrost mode.

[0030] like Figure 1 As shown, the method for determining the defrost mode may include the following steps:

[0031] Step 101: Acquire indoor ambient temperature and outdoor ambient temperature.

[0032] Optionally, the indoor ambient temperature and the outdoor ambient temperature may be obtained when the air conditioner meets the defrosting condition.

[0033] Optionally, if the pipe temperature of the outdoor heat exchanger is lower than a preset threshold, the air conditioner is determined to meet the defrosting condition. That is, if the pipe temperature of the outdoor heat exchanger is lower than the preset threshold, frost or ice will form on the surface of the outdoor heat exchanger, and defrosting is required.

[0034] Alternatively, the outdoor ambient temperature and the pipe temperature of the outdoor heat exchanger may be obtained first, and then the indoor ambient temperature may be obtained when the difference between the pipe temperature and the outdoor ambient temperature is greater than a second threshold.

[0035] That is, the air conditioner can be determined to meet the defrost conditions based on the outdoor ambient temperature and the pipe temperature of the outdoor heat exchanger. If the difference between the outdoor ambient temperature and the pipe temperature is greater than the fifth threshold, the air conditioner is determined to meet the defrost conditions, and the indoor ambient temperature is then obtained.

[0036] The fifth threshold value may be 5 degrees Celsius (° C.), 6° C., etc., which is not limited in the present disclosure.

[0037] Step 102: When the indoor ambient temperature and the outdoor ambient temperature meet preset conditions, the current operating frequency of the air conditioner and the measured opening of the expansion valve are obtained.

[0038] After obtaining the indoor and outdoor ambient temperatures, it may be further determined whether the indoor and outdoor ambient temperatures meet a preset condition, wherein the preset condition may be a temperature condition corresponding to hot gas defrosting.

[0039] Optionally, when the outdoor ambient temperature is lower than the second threshold and the indoor ambient temperature is higher than the third threshold, it is determined that the indoor ambient temperature and the outdoor ambient temperature meet a preset condition.

[0040] Alternatively, when the outdoor ambient temperature is greater than or equal to the second threshold, and the indoor ambient temperature is greater than a fourth threshold, it is determined that the indoor ambient temperature and the outdoor ambient temperature meet the preset condition.

[0041] The third threshold is greater than the fourth threshold; and the fourth threshold is greater than the second threshold.

[0042] The second threshold value may be -5°C, -6°C, etc. The third threshold value may be 15°C, 20°C, etc. The fourth threshold value may be 10°C, 12°C, etc. The present disclosure does not specifically limit the values ​​of the first threshold value, the second threshold value, and the third threshold value.

[0043] The current operating frequency of the air conditioner is the frequency at which the air conditioner was operating before entering the defrost mode. The measured opening of the expansion valve is the opening measured during operation before entering the defrost mode.

[0044] Step 103: Determine a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature.

[0045] The reference opening may be a theoretically optimal opening of the expansion valve corresponding to the current operating frequency and outdoor ambient temperature.

[0046] Optionally, the reference opening degree of the expansion valve may be determined according to a mapping relationship between the operating frequency and the outdoor ambient temperature and the reference opening degree.

[0047] That is, in a laboratory environment, the optimal expansion valve opening can be determined for the same outdoor ambient temperature and different operating frequencies. Furthermore, the optimal expansion valve opening for the same operating frequency and different outdoor ambient temperatures can be determined, thereby generating an optimal opening mapping table. While the air conditioner is running, the optimal opening mapping table can be queried based on the real-time operating frequency and outdoor ambient temperature to obtain a reference expansion valve opening for the current operating conditions.

[0048] Step 104 : determining a defrost mode according to a relationship between a difference between the measured opening and the reference opening and a first threshold.

[0049] It should be noted that in terms of air conditioning control, a theoretical optimal opening (i.e. reference opening) will be set corresponding to the outdoor ambient temperature and operating frequency. After the operation enters the closed-loop stage, the opening will be adjusted in real time according to the deviation between the exhaust and the target exhaust. When the system refrigerant is too low, the exhaust temperature is prone to overshoot and high. The air conditioning system will actively increase the opening and increase the system circulation flow, so that the exhaust is reduced and eventually approaches or reaches the target exhaust.

[0050] Therefore, the degree of fluorine deficiency can be determined by comparing the difference between the measured opening at the time of defrost entry and the reference opening corresponding to the time of defrost entry. Different degrees of fluorine deficiency have different effects on hot gas defrosting. The greater the difference between the measured opening and the reference opening, the more severe the fluorine deficiency. More severe the fluorine deficiency, the more likely it is that defrosting using hot gas defrost mode will be incomplete.

[0051] Optionally, when the difference is smaller than a first threshold, the defrost mode is determined to be hot gas defrost.

[0052] If the difference is less than the first threshold, it indicates that the air conditioner is slightly or not deficient in fluorine, and the impact on hot gas defrosting is small, so hot gas defrosting can completely defrost the air conditioner. Therefore, the defrost mode is determined to be hot gas defrost to ensure user comfort under low-temperature heating conditions.

[0053] The first threshold may be 100p, 90p, etc. This disclosure does not limit this.

[0054] Alternatively, when the difference is greater than or equal to the first threshold, the defrost mode is determined to be the reverse cycle defrost.

[0055] If the difference is greater than or equal to the first threshold, it indicates that the air conditioner is seriously defrosted, which has a significant impact on hot air defrosting. Hot air defrosting is not thorough, affecting the user experience. Therefore, the defrost mode is determined to be reverse cycle defrosting to avoid incomplete defrosting.

[0056] In the disclosed embodiment, the indoor and outdoor ambient temperatures can be first obtained. Then, when the indoor and outdoor ambient temperatures meet preset conditions, the current operating frequency of the air conditioner and the measured opening of the expansion valve are obtained. A reference opening of the expansion valve is then determined based on the operating frequency and the outdoor ambient temperature. Finally, a defrost mode is determined based on the relationship between the difference between the measured and reference openings and a first threshold. Thus, when the air conditioner requires defrost, the degree of fluorine deficiency can be determined based on the difference between the reference and measured openings of the expansion valve. The defrost mode of the air conditioner can then be determined based on the degree of fluorine deficiency. This allows the air conditioner to select an appropriate defrost mode for defrosting, thereby improving defrost reliability.

[0057] Figure 2 A flow chart of a method for determining a defrost mode provided by an embodiment of the present disclosure is shown as follows: Figure 2 As shown, the method for determining the defrost mode may include the following steps:

[0058] Step 201: Acquire indoor ambient temperature and outdoor ambient temperature.

[0059] Step 202: When the indoor ambient temperature and the outdoor ambient temperature meet preset conditions, the current operating frequency of the air conditioner and the measured opening of the expansion valve are obtained.

[0060] The specific implementation of step 201 and step 202 can refer to the detailed description in other disclosed embodiments and will not be described in detail here.

[0061] Optionally, when the indoor ambient temperature and the outdoor ambient temperature do not meet the preset conditions, the defrost mode is determined to be reverse cycle defrost.

[0062] It is understandable that when the indoor ambient temperature and the outdoor ambient temperature do not meet the preset conditions, it means that the current operating environment of the air conditioner is not suitable for hot gas defrosting. Therefore, the defrost mode is determined to be reverse cycle defrosting.

[0063] Step 203 , obtaining the lower limit and upper limit of the operating frequency of the air conditioner, the first opening of the expansion valve when the air conditioner operates at the lower limit of the operating frequency, and the second opening of the expansion valve when the air conditioner operates at the upper limit of the operating frequency.

[0064] The lower limit of the operating frequency may be the rated minimum operating frequency of the air conditioner, and the upper limit of the operating frequency may be the rated maximum operating frequency of the air conditioner.

[0065] The first opening degree may be an optimal opening degree of the expansion valve in order to ensure the performance of the air conditioner when the air conditioner operates at the lower limit of the operating frequency.

[0066] The first opening degree may be an optimal opening degree of the expansion valve in order to ensure the performance of the air conditioner when the air conditioner is operating at the upper limit of the operating frequency.

[0067] Step 204: Determine a correction coefficient based on the outdoor ambient temperature.

[0068] Optionally, the outdoor ambient temperature is positively correlated with the correction coefficient, that is, the higher the outdoor ambient temperature, the larger the correction coefficient.

[0069] Step 205 : determining a reference opening according to the lower limit of the operating frequency, the upper limit of the operating frequency, the first opening, the second opening, the correction coefficient, and the current operating frequency.

[0070] The formula for determining the reference opening can be shown as follows:

[0071]

[0072] Among them, P0 is the reference opening, F0 is the current operating frequency, F1 is the lower limit of the operating frequency, F2 is the upper limit of the operating frequency, P1 is the first opening, P2 is the second opening, k is the correction coefficient, and the value of k can be [0,100].

[0073] Step 206 : Determine the defrost mode according to the relationship between the difference between the measured opening and the reference opening and the first threshold.

[0074] In the embodiment of the present disclosure, the indoor ambient temperature and the outdoor ambient temperature can be obtained first, and then when the indoor ambient temperature and the outdoor ambient temperature meet the preset conditions, the current operating frequency of the air conditioner and the measured opening of the expansion valve are obtained, the lower limit and upper limit of the operating frequency of the air conditioner are obtained, the first opening of the expansion valve when the air conditioner operates at the lower limit of the operating frequency, and the second opening of the expansion valve when the air conditioner operates at the upper limit of the operating frequency, and the correction coefficient is determined according to the outdoor ambient temperature, and then the reference opening is determined according to the lower limit of the operating frequency, the upper limit of the operating frequency, the first opening, the second opening, the correction coefficient and the current operating frequency, and finally the defrost mode is determined according to the relationship between the difference between the measured opening and the reference opening and the first threshold value. In this way, the reference opening of the expansion valve under the current operating frequency and the outdoor ambient temperature can be accurately determined, and then the degree of fluorine deficiency can be accurately determined based on the reference opening of the expansion valve, thereby improving the accuracy of the determined defrost mode.

[0075] Figure 3 A flow chart of a method for determining a defrost mode provided by an embodiment of the present disclosure; Figure 3 As shown, the method for determining the defrost mode may include the following steps:

[0076] Step 301: Obtain the outdoor ambient temperature and the pipe temperature of the outdoor heat exchanger.

[0077] Step 302: When the difference between the outdoor ambient temperature and the pipe temperature is greater than a second threshold, obtain the indoor ambient temperature.

[0078] Step 303 , determining whether the indoor ambient temperature and the outdoor ambient temperature meet preset conditions; if so, executing step 304 ; if not, executing step 308 .

[0079] Step 304: Obtain the current operating frequency of the air conditioner and the measured opening of the expansion valve.

[0080] Step 305: Determine a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature.

[0081] Step 306 , determining whether the difference between the measured opening and the reference opening is less than a first threshold; if the difference is less than the first threshold, executing step 307 ; if the difference is not less than the first threshold, executing step 308 .

[0082] Step 307: Determine that the defrost mode is hot gas defrost.

[0083] Step 308: Determine that the defrost mode is reverse cycle defrost.

[0084] In order to implement the above embodiment, the present disclosure further proposes a device for determining a defrost mode.

[0085] Figure 4 This is a structural diagram of a device for determining a defrost mode provided in an embodiment of the present disclosure.

[0086] like Figure 4 As shown, the defrost mode determining device 400 may include:

[0087] The first acquisition module 401 is used to obtain the indoor ambient temperature and the outdoor ambient temperature;

[0088] The second acquisition module 402 is used to obtain the current operating frequency of the air conditioner and the measured opening of the expansion valve when the indoor ambient temperature and the outdoor ambient temperature meet the preset conditions;

[0089] A first determining module 403 is configured to determine a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature;

[0090] The second determining module 404 is configured to determine a defrost mode according to a relationship between a difference between the measured opening and the reference opening and a first threshold.

[0091] Optionally, the second determining module 404 is configured to:

[0092] When the difference is less than the first threshold, the defrost mode is determined to be hot gas defrost; or,

[0093] When the difference is greater than or equal to the first threshold, the defrost mode is determined to be the reverse cycle defrost.

[0094] Optionally, the first determining module 403 is configured to:

[0095] Obtaining a lower limit and an upper limit of an operating frequency of the air conditioner, a first opening degree of the expansion valve when the air conditioner operates at the lower limit of the operating frequency, and a second opening degree of the expansion valve when the air conditioner operates at the upper limit of the operating frequency;

[0096] Determine the correction factor according to the outdoor ambient temperature;

[0097] The reference opening is determined according to the operating frequency lower limit, the operating frequency upper limit, the first opening, the second opening, the correction coefficient and the current operating frequency.

[0098] Optionally, a third determining module is further included, configured to:

[0099] When the outdoor ambient temperature is lower than the second threshold and the indoor ambient temperature is higher than the third threshold, it is determined that the indoor ambient temperature and the outdoor ambient temperature meet the preset condition; or

[0100] When the outdoor ambient temperature is greater than or equal to the second threshold and the indoor ambient temperature is greater than the fourth threshold, determining that the indoor ambient temperature and the outdoor ambient temperature meet the preset condition;

[0101] The third threshold is greater than the fourth threshold; and the fourth threshold is greater than the second threshold.

[0102] Optionally, the method further includes a fourth determining module, configured to:

[0103] When the indoor ambient temperature and the outdoor ambient temperature do not meet the preset conditions, the defrost mode is determined to be reverse cycle defrost.

[0104] Optionally, the first acquisition module 401 is configured to:

[0105] Obtain the outdoor ambient temperature and the pipe temperature of the outdoor heat exchanger;

[0106] When the difference between the pipeline temperature and the outdoor ambient temperature is greater than a fifth threshold, the indoor ambient temperature is acquired.

[0107] The functions and specific implementation principles of the above modules in the embodiments of the present disclosure can be referred to the above method embodiments and will not be repeated here.

[0108] The defrost mode determination device of the disclosed embodiment can first obtain the indoor and outdoor ambient temperatures. Then, if the indoor and outdoor ambient temperatures meet preset conditions, it can obtain the current operating frequency of the air conditioner and the measured opening of the expansion valve. Then, based on the operating frequency and the outdoor ambient temperature, it can determine the reference opening of the expansion valve. Finally, based on the relationship between the difference between the measured opening and the reference opening and a first threshold value, it can determine the defrost mode. Thus, when the air conditioner needs to defrost, the degree of fluorine deficiency can be determined based on the difference between the reference opening and the measured opening of the expansion valve. Then, based on the degree of fluorine deficiency, the defrost mode of the air conditioner can be determined. This allows the air conditioner to select an appropriate defrost mode for defrosting, thereby improving the reliability of defrosting.

[0109] In order to implement the above embodiments, the present disclosure also proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, it implements the method for determining the defrost mode proposed in the above embodiments of the present disclosure.

[0110] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the method for determining the defrost mode proposed in the above embodiments of the present disclosure is implemented.

[0111] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown. Figure 5 The electronic device 12 shown is only an example and should not limit the functionality and scope of use of the embodiments of the present disclosure.

[0112] like Figure 5 As shown, electronic device 12 is implemented as a general-purpose computing device. Components of electronic device 12 may include, but are not limited to, one or more processors or processing units 16, system memory 28, and a bus 18 that connects various system components (including system memory 28 and processing unit 16).

[0113] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. Examples of such architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnection (PCI) bus.

[0114] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0115] The memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be configured to read and write non-removable, non-volatile magnetic media ( Figure 5 Not shown, often called a "hard drive"). Although Figure 5 Although not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a Compact Disc Read Only Memory (hereinafter referred to as: CD-ROM), a Digital Video Disc Read Only Memory (hereinafter referred to as: DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the various embodiments of the present disclosure.

[0116] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may include an implementation of a network environment. Program modules 42 generally implement the functions and / or methods of the embodiments described herein.

[0117] The electronic device 12 can also communicate with one or more external devices 14 (e.g., a keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the electronic device 12, and / or any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). This communication can occur via an input / output (I / O) interface 22. Furthermore, the electronic device 12 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 via the bus 18. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with the electronic device 12, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0118] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the methods mentioned in the above embodiments.

[0119] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0120] 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 being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0121] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0122] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0123] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0124] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0125] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0126] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. A person of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for determining a defrost mode, characterized in that: include: Get indoor and outdoor ambient temperatures; When the indoor ambient temperature and the outdoor ambient temperature meet preset conditions, obtaining the current operating frequency of the air conditioner and the measured opening of the expansion valve; determining a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature; The defrost mode is determined according to a relationship between a difference between the measured opening degree and the reference opening degree and a first threshold value.

2. The method according to claim 1, characterized in that The determining of the defrost mode according to a relationship between a difference between the measured opening and the reference opening and a first threshold value includes: When the difference is less than the first threshold, determining that the defrost mode is hot gas defrost; or, When the difference is greater than or equal to the first threshold, it is determined that the defrost mode is reverse cycle defrost.

3. The method according to claim 1, characterized in that Determining the reference opening of the expansion valve includes: Obtaining a lower limit and an upper limit of an operating frequency of the air conditioner, a first opening degree of the expansion valve when the air conditioner operates at the lower limit of the operating frequency, and a second opening degree of the expansion valve when the air conditioner operates at the upper limit of the operating frequency; determining a correction coefficient according to the outdoor ambient temperature; The reference opening is determined according to the operating frequency lower limit, the operating frequency upper limit, the first opening, the second opening, the correction coefficient, and the current operating frequency.

4. The method according to claim 1, wherein Also includes: When the outdoor ambient temperature is lower than a second threshold and the indoor ambient temperature is higher than a third threshold, determining that the indoor ambient temperature and the outdoor ambient temperature meet the preset condition; or, When the outdoor ambient temperature is greater than or equal to a second threshold, and the indoor ambient temperature is greater than a fourth threshold, determining that the indoor ambient temperature and the outdoor ambient temperature meet the preset condition; The third threshold is greater than the fourth threshold; and the fourth threshold is greater than the second threshold.

5. The method according to claim 4, characterized in that After obtaining the indoor ambient temperature and the outdoor ambient temperature, the method further includes: When the indoor ambient temperature and the outdoor ambient temperature do not meet the preset conditions, the defrost mode is determined to be reverse cycle defrost.

6. The method according to any one of claims 1 to 5, characterized in that: The obtaining of the indoor ambient temperature and the outdoor ambient temperature includes: Obtaining the outdoor ambient temperature and the pipe temperature of the outdoor heat exchanger; When the difference between the pipe temperature and the outdoor ambient temperature is greater than a fifth threshold, the indoor ambient temperature is acquired.

7. A device for determining a defrost mode, characterized in that: include: The first acquisition module is used to obtain the indoor ambient temperature and the outdoor ambient temperature; A second acquisition module is configured to acquire the current operating frequency of the air conditioner and the measured opening of the expansion valve when the indoor ambient temperature and the outdoor ambient temperature meet preset conditions; a first determining module, configured to determine a reference opening of the expansion valve according to the operating frequency and the outdoor ambient temperature; The second determining module is configured to determine a defrost mode according to a relationship between a difference between the measured opening and the reference opening and a first threshold.

8. The device according to claim 7, characterized in that The second determining module is configured to: When the difference is less than the first threshold, determining that the defrost mode is hot gas defrost; or, When the difference is greater than or equal to the first threshold, it is determined that the defrost mode is reverse cycle defrost.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for determining the defrost mode according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for determining the defrost mode according to any one of claims 1 to 6 is implemented.

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