CN118168099A

CN118168099A - Defrosting method and device for air conditioner, storage medium and electronic device

Info

Publication number: CN118168099A
Application number: CN202311514483.2A
Authority: CN
Inventors: 李晓群; 陈倩玉; 王艳杰; 陈继稳; 杜宗雄
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-06-11

Abstract

The application discloses a defrosting method and device of an air conditioner, a storage medium and an electronic device. Wherein the method comprises the following steps: under the condition that a target air conditioner is in a heating mode, acquiring a current pressure ratio of the target air conditioner, wherein the current pressure ratio is a ratio between a current saturated pressure corresponding to a high-pressure temperature and a protective pressure corresponding to a low-pressure temperature, defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio, and timely defrosting the air conditioner external unit can avoid heating, abrasion and the like caused by the defrosting of the air conditioner external unit, so that the technical problem that the compressor is easy to damage can be solved.

Description

Defrosting method and device for air conditioner, storage medium and electronic device

Technical Field

The application relates to the field of household appliances, in particular to a defrosting method and device of an air conditioner, a storage medium and an electronic device.

Background

As is well known, the compressor is used as one of key core components of an air conditioner, once the compressor is damaged, the maintenance is difficult and expensive, the period is long, and the user experience is seriously affected, so that the corresponding reliability protection of the compressor is very important, a compression protection switch is not generally arranged for a household small machine type (compared with a central air conditioner), the compressor is generally protected by converting the temperature of two pipes into pressure, and the compressor is rarely or not protected by a pressure ratio; however, the pressure ratio is an important parameter, which is explicitly written in a compressor specification (as shown in fig. 1), for example, a certain type of compressor, is explicitly required to operate in an air conditioner system, the compressor is allowed to be overloaded for a short time, the compressor should be controlled below 7.5, if the high compression ratio is exceeded, the compressor is more prone to heat, wear and other problems are aggravated, and the service life of the compressor is shortened or even damaged seriously.

Aiming at the technical problem that the compressor is easy to damage, no effective solution is proposed at present.

Disclosure of Invention

The embodiment of the application provides a defrosting method and device of an air conditioner, a storage medium and an electronic device, which are used for at least solving the technical problem that a compressor is easy to damage.

According to an aspect of an embodiment of the present application, there is provided a defrosting method of an air conditioner, including: under the condition that a target air conditioner is in a heating mode, acquiring a current pressure ratio of the target air conditioner, wherein the current pressure ratio is a ratio between a current saturated pressure corresponding to a high-pressure temperature and a protection pressure corresponding to a low-pressure; and defrosting the air conditioner outdoor unit of the target air conditioner according to the current pressure ratio.

Optionally, in the case that the target air conditioner is in the heating mode, acquiring the current pressure ratio of the target air conditioner includes: after the target air conditioner is started and enters a heating mode, detecting whether the target air conditioner enters a stable state; and under the condition that the target air conditioner enters a stable state, acquiring the current pressure ratio of the target air conditioner.

Optionally, in a case that the target air conditioner enters a stable state, acquiring a current pressure ratio of the target air conditioner includes: under the condition that the target air conditioner enters a stable state, acquiring the current outer tube temperature of the target air conditioner; and under the condition that the current outer tube temperature is lower than a preset temperature threshold value, acquiring the current pressure ratio of the target air conditioner.

Optionally, detecting whether the target air conditioner enters a stable state includes: acquiring a first operation time length of the target air conditioner after entering a heating mode; under the condition that the first operation time length reaches a first time length, determining that the target air conditioner enters a stable state; and under the condition that the first operation time length does not reach the first operation time length, determining that the target air conditioner does not enter a stable state.

Optionally, detecting whether the target air conditioner enters a stable state includes: acquiring a second operation time length of the target air conditioner after entering the highest frequency; under the condition that the second operation time length reaches a second time length, determining that the target air conditioner enters a stable state; and under the condition that the second operation time period does not reach the second operation time period, determining that the target air conditioner does not enter a stable state.

Optionally, defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio comprises: and controlling the air conditioner to normally operate under the condition that the current pressure ratio is smaller than a first reference pressure ratio, and defrosting the air conditioner external unit of the target air conditioner.

Optionally, defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio comprises: defrosting the air conditioner external unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the first reference pressure ratio and smaller than a second reference pressure ratio and the operation time length reaches a third time length, wherein the second reference pressure is higher than the first reference pressure; and defrosting the air conditioner outdoor unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the second reference pressure ratio.

According to another aspect of the embodiment of the present application, there is also provided a defrosting device of an air conditioner, including: the device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current pressure ratio of a target air conditioner under the condition that the target air conditioner is in a heating mode, wherein the current pressure ratio is the ratio between the current high-pressure temperature corresponding saturation pressure and the low-pressure corresponding protection pressure; and the defrosting unit is used for defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio.

Optionally, the obtaining unit is further configured to: after the target air conditioner is started and enters a heating mode, detecting whether the target air conditioner enters a stable state; and under the condition that the target air conditioner enters a stable state, acquiring the current pressure ratio of the target air conditioner.

Optionally, the obtaining unit is further configured to: under the condition that the target air conditioner enters a stable state, acquiring the current outer tube temperature of the target air conditioner; and under the condition that the current outer tube temperature is lower than a preset temperature threshold value, acquiring the current pressure ratio of the target air conditioner.

Optionally, the obtaining unit is further configured to: acquiring a first operation time length of the target air conditioner after entering a heating mode; under the condition that the first operation time length reaches a first time length, determining that the target air conditioner enters a stable state; and under the condition that the first operation time length does not reach the first operation time length, determining that the target air conditioner does not enter a stable state.

Optionally, the obtaining unit is further configured to: acquiring a second operation time length of the target air conditioner after entering the highest frequency; under the condition that the second operation time length reaches a second time length, determining that the target air conditioner enters a stable state; and under the condition that the second operation time period does not reach the second operation time period, determining that the target air conditioner does not enter a stable state.

Optionally, the defrosting unit is further configured to: and controlling the air conditioner to normally operate under the condition that the current pressure ratio is smaller than a first reference pressure ratio, and defrosting the air conditioner external unit of the target air conditioner.

Optionally, the defrosting unit is further configured to: defrosting the air conditioner external unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the first reference pressure ratio and smaller than a second reference pressure ratio and the operation time length reaches a third time length, wherein the second reference pressure is higher than the first reference pressure; and defrosting the air conditioner outdoor unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the second reference pressure ratio.

According to another aspect of the embodiments of the present application, there is also provided a storage medium including a stored program that executes the above-described method when running.

According to another aspect of the embodiments of the present application, there is also provided an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor executing the method described above by the computer program.

In the embodiment of the application, under the condition that the target air conditioner is in a heating mode, the current pressure ratio of the target air conditioner is obtained, the current pressure ratio is the ratio between the saturated pressure corresponding to the current high-pressure temperature and the protective pressure corresponding to the low-pressure, the external air conditioner of the target air conditioner is defrosted according to the current pressure ratio, and the external air conditioner is defrosted in time, so that the technical problems of easy damage of the compressor under the conditions of heating, abrasion and the like brought by the defrosting of the external air conditioner can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a schematic illustration of an alternative air conditioner;

FIG. 2 is a flow chart of an alternative method of defrosting an air conditioner according to an embodiment of the application;

FIG. 3 is a schematic diagram of an alternative defrosting scheme for an air conditioner according to an embodiment of the present application;

FIG. 4 is a schematic view of a defrosting apparatus of an alternative air conditioner according to an embodiment of the present application;

Fig. 5 is a block diagram of a structure of a terminal according to an embodiment of the present application.

Detailed Description

In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The inventors have analyzed that air conditioning generally has high pressure protection (via pipe Wen Huansuan), whereas the maximum absolute pressure of a typical home air conditioning system is limited to 4Mpa, corresponding to a pipe temperature of 63 ℃, if by limitation, gao Yabi 7.5.5 is exceeded, often corresponding to a lower low pressure, 4/7.5=0.53, which corresponds to a saturation temperature of-3.2 ℃. Therefore, the high-pressure ratio condition of the general air conditioning system is often the condition of a low-temperature heating mode, and the existing air conditioners in the market are basically heat pump modes and have a refrigerating and heating mode. The air conditioner has a heating function, can be operated in a low-temperature environment, the lower the temperature is, the lower the corresponding low pressure of the system is, the smaller the high-pressure ratio denominator is, the larger the compressor is, and the frosting can be met under the condition that the environment is lower than 0 ℃, and when the air conditioner is frosted, the low-pressure low-temperature condition of the air conditioning system can be aggravated.

Based on the above, the application provides a logic function for protecting the compressor pressure ratio from being too high and an air conditioner thereof, and the compressor pressure ratio protecting function is added under the condition of not increasing the cost according to the existing detection parameters.

The valve blocking function judgment logic is added, so that the risk of error protection is avoided while timeliness protection is achieved, the new function does not need to be added with new cost, the enterprise image can be improved, after-sale problem investigation is improved, and after-sale fault maintenance is reduced.

According to an aspect of the embodiment of the application, an embodiment of a defrosting method of an air conditioner is provided. Fig. 2 is a flowchart of an alternative defrosting method of an air conditioner according to an embodiment of the present application, and as shown in fig. 2, the method may include the steps of:

Step S1, under the condition that the target air conditioner is in a heating mode, acquiring the current pressure ratio of the target air conditioner, wherein the current pressure ratio is the ratio between the current saturated pressure corresponding to the high-pressure temperature and the protection pressure corresponding to the low-pressure.

In the above embodiment, after the target air conditioner is turned on and enters a heating mode, whether the target air conditioner enters a stable state is detected; acquiring a current pressure ratio of the target air conditioner under the condition that the target air conditioner enters a stable state, for example, the current outer tube temperature of the target air conditioner can be acquired first; and under the condition that the current outer tube temperature is lower than a preset temperature threshold value, acquiring the current pressure ratio of the target air conditioner.

Optionally, detecting whether the target air conditioner enters a stable state includes the following two ways: 1) Acquiring a first operation time length after the target air conditioner enters a heating mode, determining that the target air conditioner enters a stable state when the first operation time length reaches a first time length, and determining that the target air conditioner does not enter the stable state when the first operation time length does not reach the first time length; 2) Acquiring a second operation time length of the target air conditioner after entering the highest frequency; under the condition that the second operation time length reaches a second time length, determining that the target air conditioner enters a stable state; and under the condition that the second operation time period does not reach the second operation time period, determining that the target air conditioner does not enter a stable state.

And S2, defrosting the air conditioner outdoor unit of the target air conditioner according to the current pressure ratio.

For example: controlling the air conditioner to normally operate and defrosting the air conditioner external unit of the target air conditioner under the condition that the current pressure ratio is smaller than a first reference pressure ratio; defrosting the air conditioner external unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the first reference pressure ratio and smaller than a second reference pressure ratio and the operation time length reaches a third time length, wherein the second reference pressure is higher than the first reference pressure; and defrosting the air conditioner outdoor unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the second reference pressure ratio.

Through the steps, under the condition that the target air conditioner is in a heating mode, the current pressure ratio of the target air conditioner is obtained, the current pressure ratio is the ratio between the current high-pressure temperature corresponding saturation pressure and the current low-pressure corresponding protection pressure, the air conditioner external unit of the target air conditioner is defrosted according to the current pressure ratio, and the technical problem that the compressor is easy to damage under the conditions of heating, abrasion and the like caused by the fact that the air conditioner external unit is defrosted in time can be avoided.

According to the technical scheme, under the heating mode of the air conditioner, under the condition that the hidden danger of frosting of the condenser of the external machine is identified, the parameters of the air conditioner system are monitored, the pressure ratio is calculated, the compressor is timely protected from entering defrosting under the condition that the compressor is possibly damaged by the pressure ratio, the pressure ratio allowance is improved, and damage caused by the high pressure ratio of the air conditioner is avoided. As an alternative example, the technical solution of the present application is further described in detail below in conjunction with specific embodiments.

Referring to fig. 3, the specific embodiment is as follows:

the air conditioner is a heat pump system, has a heating function, and has the tube temperature of an evaporator of a conventional air conditioner, the tube temperature of a condenser is detected, and the tube temperature is converted into corresponding saturation pressure by the controller;

Step 1, a user starts up and enters a heating mode, and then whether the air conditioner enters a stable state is judged, for example, after the air conditioner system is judged to run for T1 time or after the running frequency reaches the current maximum frequency for T2 time.

When the air conditioning system is started up and operates and the set temperature is different from the current temperature by a large amount, the air conditioner is started up and operates at a high frequency, a general frequency converter operates, in the frequency raising process, the system is in an unstable state, a general refrigerant at the low pressure side (the external side) is in a suction state, the low pressure is lower, the whole system does not reach a stable state, the operation time T1 represents the time when the air conditioning system initially enters the stable state, for example, 5 minutes, or the time T2 after the frequency reaches the current maximum frequency, which means the meaning of the time T1 is the same as that when the system initially reaches the stable state, and the parameter change of the unstable system is not referred to.

Step 2, judging whether t _{Outer tube temperature} is less than or equal to 0 ℃, if not, the air conditioning system does not have the condition that the high pressure ratio is more than 7.5, and as can be seen from the previous example, the high pressure ratio condition can be possibly generated when the temperature of the low-pressure corresponding outer pipe is lower than-3.2 ℃; if yes, reading the corresponding saturated compression of the real-time pipe temperature and the temperature of the internal machine and the external machine, and calculating the system pressure ratio data: pressure ratio = high pressure temperature corresponds to saturation pressure/low pressure corresponds to protection pressure; in addition, because t _{Outer tube temperature} is less than or equal to 0 ℃, the external machine may involve frosting, the low pressure is further reduced, the noise high pressure ratio is further increased, and therefore real-time detection is required.

Further determination is made as to whether the pressure ratio is less than 7, wherein 7 is the parameter data given by the compressor specification, which can be adjusted according to the situation, for example, conservative settings can be set to 6.5 or the like; when the conditions are met, executing according to normal operation and defrosting logic of the air conditioner; if not, judging that the pressure ratio E [7,7.5 ] is satisfied and the time T3 is satisfied (the time T3 can be 2-7min and is the same as the specification requirement of the compressor) or the pressure ratio is more than or equal to 7.5, and if the pressure ratio E [7,7.5 ] is satisfied, executing defrosting to avoid the damage of the high pressure ratio of the compressor.

The general air conditioner has built-in logic, and the defrosting is carried out through time, outer pipe temperature and other conditions to meet the requirements of indoor heat and air-out temperature, but the time parameter is not good or is difficult to enter defrosting when the outer pipe temperature condition of entering defrosting is set, so that the comfort experience of a user is influenced, the situation that the outdoor unit is excessively frosted, the pressure ratio is overloaded, and further the noise compressor is irreversibly damaged is also possible.

It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.

From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present application.

According to another aspect of the embodiment of the application, there is also provided a defrosting device of an air conditioner for implementing the defrosting method of the air conditioner. Fig. 4 is a schematic view of an alternative defrosting apparatus of an air conditioner according to an embodiment of the present application, and as shown in fig. 4, the apparatus may include:

an obtaining unit 41, configured to obtain, when a target air conditioner is in a heating mode, a current pressure ratio of the target air conditioner, where the current pressure ratio is a ratio between a current high-pressure temperature corresponding saturation pressure and a current low-pressure corresponding protection pressure; and a defrosting unit 43, configured to defrost the outdoor unit of the target air conditioner according to the current pressure ratio.

Through the module, under the condition that the target air conditioner is in the heating mode, the current pressure ratio of the target air conditioner is obtained, the current pressure ratio is the ratio between the current high-pressure temperature corresponding saturation pressure and the current low-pressure corresponding protection pressure, the air conditioner external unit of the target air conditioner is subjected to defrosting according to the current pressure ratio, and the air conditioner external unit is timely defrosted, so that the technical problems that the compressor is easy to damage under the conditions of heating, abrasion and the like caused by the defrosting can be avoided.

It should be noted that the above modules are the same as examples and application scenarios implemented by the corresponding steps, but are not limited to what is disclosed in the above embodiments. It should be noted that, the above modules may be implemented in a corresponding hardware environment as part of the apparatus, and may be implemented in software, or may be implemented in hardware, where the hardware environment includes a network environment.

According to another aspect of the embodiment of the application, a server or a terminal for implementing the defrosting method of the air conditioner is also provided.

Fig. 5 is a block diagram of a terminal according to an embodiment of the present application, and as shown in fig. 5, the terminal may include: one or more (only one is shown) processors 501, memory 503, and transmission means 505, as shown in fig. 5, the terminal may further comprise input output devices 507.

The memory 503 may be used to store software programs and modules, such as program instructions/modules corresponding to the defrosting method and apparatus of the air conditioner in the embodiment of the present application, and the processor 501 executes the software programs and modules stored in the memory 503, thereby executing various functional applications and data processing, that is, implementing the defrosting method of the air conditioner. Memory 503 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, the memory 503 may further include memory located remotely from the processor 501, which may be connected to the terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The transmission device 505 is used for receiving or transmitting data via a network, and may also be used for data transmission between the processor and the memory. Specific examples of the network described above may include wired networks and wireless networks. In one example, the transmission device 505 includes a network adapter (Network Interface Controller, NIC) that may be connected to other network devices and routers via a network cable to communicate with the internet or a local area network. In one example, the transmission device 505 is a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.

Wherein in particular the memory 503 is used for storing application programs.

The processor 501 may call an application stored in the memory 503 via the transmission means 505 to perform the following steps:

under the condition that a target air conditioner is in a heating mode, acquiring a current pressure ratio of the target air conditioner, wherein the current pressure ratio is a ratio between a current saturated pressure corresponding to a high-pressure temperature and a protection pressure corresponding to a low-pressure; and defrosting the air conditioner outdoor unit of the target air conditioner according to the current pressure ratio.

Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments, and this embodiment is not described herein.

It will be appreciated by those skilled in the art that the structure shown in fig. 5 is only illustrative, and the terminal may be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a palm computer, a Mobile internet device (Mobile INTERNET DEVICES, MID), a PAD, etc. Fig. 5 is not limited to the structure of the electronic device. For example, the terminal may also include more or fewer components (e.g., network interfaces, display devices, etc.) than shown in fig. 5, or have a different configuration than shown in fig. 5.

Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute in association with hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.

The embodiment of the application also provides a storage medium. Alternatively, in the present embodiment, the above-described storage medium may be used for executing the program code of the defrosting method of the air conditioner.

Alternatively, in this embodiment, the storage medium may be located on at least one network device of the plurality of network devices in the network shown in the above embodiment.

Alternatively, in the present embodiment, the storage medium is configured to store program code for performing the steps of:

Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

The integrated units in the above embodiments may be stored in the above-described computer-readable storage medium if implemented in the form of software functional units and sold or used as separate products. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing one or more computer devices (which may be personal computers, servers or network devices, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.

In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In several embodiments provided by the present application, it should be understood that the disclosed client may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, such as the division of the units, is merely a logical function division, and may be implemented in another manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.

Claims

1. A defrosting method of an air conditioner, comprising:

under the condition that a target air conditioner is in a heating mode, acquiring a current pressure ratio of the target air conditioner, wherein the current pressure ratio is a ratio between a current saturated pressure corresponding to a high-pressure temperature and a protection pressure corresponding to a low-pressure;

And defrosting the air conditioner outdoor unit of the target air conditioner according to the current pressure ratio.

2. The method of claim 1, wherein obtaining the current pressure ratio of the target air conditioner in a case where the target air conditioner is in a heating mode comprises:

After the target air conditioner is started and enters a heating mode, detecting whether the target air conditioner enters a stable state;

And under the condition that the target air conditioner enters a stable state, acquiring the current pressure ratio of the target air conditioner.

3. The method according to claim 2, wherein, in the case where the target air conditioner enters a steady state, acquiring the current pressure ratio of the target air conditioner includes:

Under the condition that the target air conditioner enters a stable state, acquiring the current outer tube temperature of the target air conditioner;

And under the condition that the current outer tube temperature is lower than a preset temperature threshold value, acquiring the current pressure ratio of the target air conditioner.

4. The method of claim 2, wherein detecting whether the target air conditioner enters a steady state comprises:

acquiring a first operation time length of the target air conditioner after entering a heating mode;

under the condition that the first operation time length reaches a first time length, determining that the target air conditioner enters a stable state;

And under the condition that the first operation time length does not reach the first operation time length, determining that the target air conditioner does not enter a stable state.

5. The method of claim 2, wherein detecting whether the target air conditioner enters a steady state comprises:

acquiring a second operation time length of the target air conditioner after entering the highest frequency;

Under the condition that the second operation time length reaches a second time length, determining that the target air conditioner enters a stable state;

and under the condition that the second operation time period does not reach the second operation time period, determining that the target air conditioner does not enter a stable state.

6. The method according to any one of claims 1 to 5, wherein defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio, comprises:

And controlling the air conditioner to normally operate under the condition that the current pressure ratio is smaller than a first reference pressure ratio, and defrosting the air conditioner external unit of the target air conditioner.

7. The method according to any one of claims 1 to 5, wherein defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio, comprises:

Defrosting the air conditioner external unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to a first reference pressure ratio and smaller than a second reference pressure ratio and the operation time length reaches a third time length, wherein the second reference pressure is higher than the first reference pressure;

and defrosting the air conditioner outdoor unit of the target air conditioner under the condition that the current pressure ratio is larger than or equal to the second reference pressure ratio.

8. A defrosting apparatus of an air conditioner, comprising:

The device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the current pressure ratio of a target air conditioner under the condition that the target air conditioner is in a heating mode, wherein the current pressure ratio is the ratio between the current high-pressure temperature corresponding saturation pressure and the low-pressure corresponding protection pressure;

and the defrosting unit is used for defrosting the air conditioner external unit of the target air conditioner according to the current pressure ratio.

9. A storage medium comprising a stored program, wherein the program when run performs the method of any one of the preceding claims 1 to 7.

10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor performs the method of any of the preceding claims 1 to 7 by means of the computer program.