CN110360711A - Air conditioner anti-freezing method, air conditioner and computer readable storage medium - Google Patents
Air conditioner anti-freezing method, air conditioner and computer readable storage medium Download PDFInfo
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- CN110360711A CN110360711A CN201910664356.8A CN201910664356A CN110360711A CN 110360711 A CN110360711 A CN 110360711A CN 201910664356 A CN201910664356 A CN 201910664356A CN 110360711 A CN110360711 A CN 110360711A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000007710 freezing Methods 0.000 title claims abstract description 37
- 238000003860 storage Methods 0.000 title claims abstract description 17
- 238000004590 computer program Methods 0.000 claims abstract description 25
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 238000004378 air conditioning Methods 0.000 claims description 84
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 51
- 230000002528 anti-freeze Effects 0.000 claims description 51
- 230000000694 effects Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005373 pervaporation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner anti-freezing method, an air conditioner and a computer readable storage medium, wherein the method comprises the following steps: acquiring the current working state of the air conditioner; if the current working state is that the running time of the air conditioner entering the refrigeration mode exceeds the first preset time, determining a current preset interval according to the absolute value of the difference value between the real-time preset temperature value and the real-time indoor environment temperature; detecting an inlet pressure value of the evaporator; and determining the entering time and exiting time of the anti-freezing mode according to the pressure threshold value corresponding to the inlet pressure value and the current preset interval. The air conditioner comprises a controller, and the controller is used for realizing the anti-freezing method of the air conditioner when executing the computer program stored in the memory. A computer-readable storage medium having stored thereon a computer program which, when executed by a controller, implements the above-described air conditioner anti-freezing method. The invention can improve the accuracy of controlling the air conditioner to enter the anti-freezing state.
Description
Technical field
The present invention relates to air-conditioning technical fields, specifically, being related to a kind of air-conditioning anti-freezing method, further relate to using the air-conditioning
The air-conditioning of anti-freezing method further relates to the computer readable storage medium using the air-conditioning anti-freezing method.
Background technique
In air conditioner in use, refrigeration mode evaporimeter frosting is common problem.Major part designer now
On an evaporator assemble a temperature sensing package, using temperature sensing package acquire evaporator tube temperature, using evaporator tube temp controller group into
Enter to exit anti-freeze mode.Although the method can also reach anti-freeze effect, using when anti-freeze temperature sensing package anti-freeze at
This is relatively high.And anti-freeze temperature sensing package, due to working in the environment of hot and cold alternation, temperature sensing package is easy to appear failure, detection partially
The problems such as difference, service life, causes unit anti-freeze logic to fail, to the reliability effect air-conditioning defrost because of temperature sensing package occur
The problem of performance.
Summary of the invention
The first object of the present invention is to provide a kind of air-conditioning that control air-conditioning can be improved and enter the accuracy of anti-freeze state
Anti-freezing method.
The second object of the present invention is to provide a kind of air-conditioning that control air-conditioning can be improved and enter the accuracy of anti-freeze state.
The third object of the present invention is to provide a kind of calculating that control air-conditioning can be improved and enter the accuracy of anti-freeze state
Machine readable storage medium storing program for executing.
In order to realize above-mentioned first purpose, air-conditioning anti-freezing method provided by the invention includes: the current work for obtaining air-conditioning
Make state；If current working status is that air-conditioning enters refrigeration mode operation duration more than the first preset duration, according to pre- in real time
If the absolute value of the difference of temperature value and real-time indoor environment temperature determines current preset section；Detect the inlet pressure of evaporator
Value；The entry time of anti-freeze mode is determined according to inlet pressure pressure threshold corresponding with current preset section and is exited
Time.
By above scheme as it can be seen that it is more than that air-conditioning anti-freezing method of the invention, which enters refrigeration mode operation duration in air-conditioning,
After one preset duration, current preset locating for the absolute value of the difference of real-time preset temperature value and real-time indoor environment temperature is judged
Section, and according to the corresponding pressure threshold of the inlet pressure of evaporator and current preset section determine anti-freeze mode into
The angle of incidence and exit time are detected without setting temperature sensing package, avoid the problem that temperature sensing package is easy failure, moreover,
By the division in section locating for absolute value, so that the control of anti-freeze mode is more accurate, better anti-freeze effect can reach,
The refrigerating capacity of air-conditioner set and comfort are higher simultaneously.
In further embodiment, anti-freeze mould is determined according to inlet pressure pressure threshold corresponding with current preset section
The step of entry time of formula and exit time includes: to detect that inlet pressure is greater than currently in continuous second preset duration
When the corresponding pressure threshold of pre-set interval, determines and enter anti-freeze mode.
It can be seen that if frosting situation occurs in evaporator, will affect the import of evaporator due in refrigeration mode
Pressure value, therefore, in the entrance for determining anti-freeze mode according to inlet pressure pressure threshold corresponding with current preset section
When the time, if continuous second preset duration detects that inlet pressure is greater than the corresponding pressure threshold in current preset section, recognize
To need to enter anti-freeze mode.
In further embodiment, anti-freeze mould is determined according to inlet pressure pressure threshold corresponding with current preset section
The step of entry time of formula and exit time further include: when after entrance anti-freeze mode and reaching third preset duration,
Exit anti-freeze mode.
It can be seen that the refrigeration effect in order to ensure air-conditioning, is entering anti-freeze mode after a certain period of time, is needing to exit anti-
Freezing mode makes air-conditioning reenter refrigeration mode refrigeration.
In further embodiment, anti-freeze mode are as follows: close compressor, indoor fan close room to run when front windshield
Outer blower.
It can be seen that close compressor makes air-conditioning no longer freeze in anti-freeze mode so that the refrigerant of high temperature into
When pervaporation device, defrost is carried out to evaporator, to prevent evaporator freeze.
In further embodiment, determined according to the absolute value of real-time preset temperature value and the difference of real-time indoor environment temperature
The step of current preset section includes: if that absolute value is less than or equal to the first fiducial temperature value, determine that current preset section is
First pre-set interval.
In further embodiment, determined according to the absolute value of real-time preset temperature value and the difference of real-time indoor environment temperature
The step of current preset section further include: if absolute value is greater than the first fiducial temperature value and is less than or equal to the second fiducial temperature value
When, determine that current preset section is the second pre-set interval.
In further embodiment, determined according to the absolute value of real-time preset temperature value and the difference of real-time indoor environment temperature
The step of current preset section further include: if absolute value is greater than the second fiducial temperature value, determine that current preset section is third
Pre-set interval.
It can be seen that carrying out section by the absolute value to real-time preset temperature value and the difference of real-time indoor environment temperature
It divides, control that can be more accurate is included in the opportunity of anti-freeze mode.
In order to realize the second object of the present invention, it includes processor and memory that the present invention, which provides air-conditioning, and memory is deposited
The step of containing computer program, above-mentioned air-conditioning anti-freezing method realized when computer program is executed by processor.
In order to realize the third object of the present invention, computer readable storage medium provided by the invention is stored thereon with meter
Calculation machine program, the step of above-mentioned air-conditioning anti-freezing method is realized when computer program is executed by a controller.
Detailed description of the invention
Fig. 1 is the flow chart of air-conditioning anti-freezing method embodiment of the present invention.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Air-conditioning anti-freezing method of the invention is the computer program applied in air-conditioning, it is preferred that air-conditioning setting is useful
Device, the knot of air-conditioning are passed in the temperature sensor of detection indoor environment temperature and the pressure of the inlet pressure for detecting evaporator
Structure is set as technology known in those skilled in the art, and in inventive point of the invention no longer structure, details are not described herein.
Air-conditioning anti-freezing method of the invention is applied on air-conditioning, for realizing the control to air-conditioning anti-freeze.The present invention
A kind of air-conditioning is also provided, which includes circuit board, and controller is provided on circuit board, and controller is deposited for executing in memory
The step of above-mentioned air-conditioning anti-freezing method is realized when the computer program of storage.The present invention also provides a kind of computer-readable storages
Medium, is stored thereon with computer program, and above-mentioned air-conditioning anti-freezing method is realized when computer program is executed by a controller
Step.
Air-conditioning anti-freezing method embodiment:
Air-conditioning anti-freezing method of the invention is the application program applied in air conditioner, for realizing to air-conditioning anti-freeze
Control.
Referring to Fig. 1, air-conditioning anti-freezing method is first carried out step S1, obtains working as air-conditioning when carrying out anti-freeze control
Preceding working condition.Air-conditioning system can generate various operation datas in use, e.g., the temperature information of component, the pressure of component
Force information, component operation information and trip information etc..By reading the operation data of air-conditioning, the current of air-conditioning can get
Working condition.
After obtaining current working status, step S2 is executed, judges whether current working status is that air-conditioning enters refrigeration mode
Operation duration is more than the first preset duration.Wherein, the first preset duration entered after refrigeration mode according to air-conditioning occur frosting when
Between determine, can pass through test obtain.When there is refrigeration mode due to air-conditioning when certain time length, evaporator will appear frost,
To influence the refrigeration performance of air-conditioning.Therefore, entering refrigeration mode operation duration in air-conditioning is more than that the first preset duration then need to be into
The processing of row anti-freeze.
When executing step S2, if air-conditioning enters refrigeration mode operation duration and is not up to the first preset duration, do not need
Anti-freeze processing is carried out, the current working status for obtaining air-conditioning is continued.If current working status is that air-conditioning enters refrigeration mode fortune
When row duration is more than the first preset duration, S3 is thened follow the steps, according to real-time preset temperature value and real-time indoor environment temperature
The absolute value of difference determines current preset section.At runtime due to air-conditioning, indoor environment temperature can enter refrigeration with air-conditioning
Mode operation duration corresponding change, therefore, it is necessary to obtain real-time preset temperature value to judge real-time indoor environment temperature, from
And improve the accuracy of judgement.Current preset section can be configured as needed.
In the present embodiment, determined according to the absolute value of real-time preset temperature value and the difference of real-time indoor environment temperature current
The step of pre-set interval includes: if that absolute value is less than or equal to the first fiducial temperature value, determine that current preset section is first
Pre-set interval；If absolute value is greater than the first fiducial temperature value and is less than or equal to the second fiducial temperature value, current preset is determined
Section is the second pre-set interval.If absolute value is greater than the second fiducial temperature value, determine that current preset section is third preset areas
Between.First fiducial temperature value and the second fiducial temperature value can be obtained according to experimental data.
After determining current preset section, step 4 is executed, the inlet pressure of evaporator is detected.Real-time preset temperature value
Current preset section corresponding to absolute value with the difference of real-time indoor environment temperature can reflect out unit reflection air-conditioning
Operating states of the units, when air-conditioner set operating status difference, the frosting degree of evaporator is different, thus cause evaporator into
Mouth pressure value has different, and therefore, it is necessary to enter the opportunity of anti-freeze mode according to the judgement of the inlet pressure of evaporator.
The inlet pressure of evaporator can pass device by the pressure of the inlet pressure for detecting evaporator and obtain.
After the inlet pressure of detection evaporator, step S5 is executed, according to inlet pressure and current preset section pair
The pressure threshold answered determines entry time and the exit time of anti-freeze mode.Since air-conditioner set operating status is not steamed simultaneously
The frosting degree for sending out device is different, so that the inlet pressure of evaporator be caused to have different, therefore, it is necessary to according to current pre-
If section sets corresponding pressure threshold and detects to inlet pressure, to improve the accuracy into anti-freeze mode.
In the present embodiment, anti-freeze mode is determined according to inlet pressure pressure threshold corresponding with current preset section
The step of entry time and exit time includes: to detect that inlet pressure is greater than current preset in continuous second preset duration
When the corresponding pressure threshold in section, determines and enter anti-freeze mode.Second preset duration is in current preset section according to air-conditioning
When, occur determining at the time of frosting, can be obtained according to experimental result.For example, when current preset section is the first pre-set interval, the
Two preset durations are 5 minutes；When current preset section is the second pre-set interval, the second preset duration is 4 minutes；Current preset area
Between be third pre-set interval when, the second preset duration be 3 minutes.
According to inlet pressure pressure threshold corresponding with current preset section determine the entry time of anti-freeze mode with
And the step of exit time further include: after entering anti-freeze mode and when reaching third preset duration, exit anti-freeze mode.
In order to ensure the refrigeration effect of air-conditioning, is entering anti-freeze mode after a certain period of time, needing to exit anti-freeze mode, make air-conditioning weight
Newly enter refrigeration mode to freeze.Third preset duration is determined according to current preset section, can be obtained according to experimental data.For example,
When current preset section is the first pre-set interval, third preset duration is 7 minutes；Current preset section is the second pre-set interval
When, third preset duration is 9 minutes；When current preset section is third pre-set interval, third preset duration is 11 minutes.
After exiting anti-freeze mode, operation of air conditioner normal refrigerating mode, compressor opens refrigeration, opens next anti-freeze
The detection in period.
Air-conditioning embodiment:
The air-conditioning of the present embodiment includes shell, and circuit board is provided in shell, and controller is provided on circuit board and is deposited
Reservoir, memory are stored with computer program, and controller realizes that above-mentioned air-conditioning anti-freezing method is implemented when executing computer program
Step in example.
For example, computer program can be divided into one or more modules, one or more module, which is stored in, is deposited
It in reservoir, and is executed by controller, to complete the present invention.One or more modules can be the system that can complete specific function
Column count machine program instruction section, the instruction segment is for describing implementation procedure of the computer program in air-conditioning.
Air-conditioning may include, but be not limited only to, controller, memory.It will be understood by those skilled in the art that air-conditioning can wrap
More or fewer components are included, perhaps combine certain components or different components, such as air-conditioning can also include input and output
Equipment, network access equipment, bus etc..
For example, controller can be central processing unit (Central Processing Unit, CPU), it can also be
His general purpose controller, digital signal controller (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array
(FieldProgrammable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor are patrolled
Collect device, discrete hardware components etc..General purpose controller can be microcontroller or the controller be also possible to it is any conventional
Controller etc..Controller is the control centre of air-conditioning, utilizes the various pieces of various interfaces and the entire air-conditioning of connection.
Memory can be used for storing computer program and/or module, and controller is stored in memory by operation or execution
Interior computer program and/or module, and the data being stored in memory are called, realize the various functions of air-conditioning.For example,
Memory can mainly include storing program area and storage data area, wherein storing program area can storage program area, at least one
Application program needed for function (such as sound receive capabilities, sound are converted into literal function etc.) etc.；Storage data area can store
Created data (such as audio data, text data etc.) etc. are used according to mobile phone.In addition, memory may include high speed
Random access memory can also include nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligent memory card
(Smart Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card), at least
One disk memory, flush memory device or other volatile solid-state parts.
Computer readable storage medium embodiment:
If the integrated module of the air-conditioning of above-described embodiment is realized in the form of SFU software functional unit and as independent production
Product when selling or using, can store in a computer readable storage medium.Based on this understanding, above-mentioned air-conditioning is realized
All or part of the process in anti-freezing method embodiment can also instruct relevant hardware come complete by computer program
At computer program can be stored in a computer readable storage medium, which, can be real when being executed by a controller
The step of existing above-mentioned air-conditioning anti-freezing method embodiment.Wherein, computer program includes computer program code, computer program
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..Storage medium can wrap
It includes: any entity or device, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, meter of computer program code can be carried
Calculation machine memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access
Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that computer-readable medium includes
Content can be according to making laws in jurisdiction and the requirement of patent practice carries out increase and decrease appropriate, such as in certain judicial pipes
Area under one's jurisdiction does not include electric carrier signal and telecommunication signal according to legislation and patent practice, computer-readable medium.
It can be seen from the above, it is more than first pre- that air-conditioning anti-freezing method of the invention, which enters refrigeration mode operation duration in air-conditioning,
If after duration, judging current preset area locating for the absolute value of the difference of real-time preset temperature value and real-time indoor environment temperature
Between, and determine according to the corresponding pressure threshold of the inlet pressure of evaporator and current preset section the entrance of anti-freeze mode
Time and exit time are detected without setting temperature sensing package, avoid the problem that temperature sensing package is easy failure, moreover, logical
The division in section locating for absolute value is crossed, so that the control of anti-freeze mode is more accurate, can reach better anti-freeze effect, together
When air-conditioner set refrigerating capacity and comfort it is higher.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept invented is not limited thereto,
All insubstantial modifications made using this design to the present invention, are also fallen within the scope of protection of the present invention.
Claims (9)
1. a kind of air-conditioning anti-freezing method, it is characterised in that: include:
Obtain the current working status of air-conditioning；
If the current working status is that air-conditioning enters refrigeration mode operation duration more than the first preset duration, according to pre- in real time
If the absolute value of the difference of temperature value and real-time indoor environment temperature determines current preset section；
Detect the inlet pressure of evaporator；
When determining the entrance of anti-freeze mode according to inlet pressure pressure threshold corresponding with the current preset section
Between and exit time.
2. air-conditioning anti-freezing method according to claim 1, it is characterised in that:
It is described according to inlet pressure pressure threshold corresponding with the current preset section determine anti-freeze mode into
The step of angle of incidence and exit time includes:
Detect that the inlet pressure is greater than the corresponding pressure threshold in the current preset section in continuous second preset duration
When, it determines and enters the anti-freeze mode.
3. air-conditioning anti-freezing method according to claim 2, it is characterised in that:
It is described according to inlet pressure pressure threshold corresponding with the current preset section determine anti-freeze mode into
The step of angle of incidence and exit time further include:
After entering the anti-freeze mode and when reaching third preset duration, the anti-freeze mode is exited.
4. air-conditioning anti-freezing method according to any one of claims 1 to 3, it is characterised in that:
The anti-freeze mode are as follows: close compressor, indoor fan close outdoor fan to run when front windshield.
5. air-conditioning anti-freezing method according to any one of claims 1 to 3, it is characterised in that:
The absolute value of the real-time preset temperature value of basis and the difference of real-time indoor environment temperature determines current preset section
Step includes:
If the absolute value is less than or equal to the first fiducial temperature value, determine that the current preset section is the first preset areas
Between.
6. air-conditioning anti-freezing method according to claim 5, it is characterised in that:
The absolute value of the real-time preset temperature value of basis and the difference of real-time indoor environment temperature determines current preset section
Step further include:
If the absolute value is worked as described in greater than the first fiducial temperature value and when being less than or equal to the second fiducial temperature value, determining
Preceding pre-set interval is the second pre-set interval.
7. air-conditioning anti-freezing method according to claim 6, it is characterised in that:
The absolute value of the real-time preset temperature value of basis and the difference of real-time indoor environment temperature determines current preset section
Step further include:
If the absolute value is greater than the second fiducial temperature value, determine that the current preset section is third pre-set interval.
8. a kind of air-conditioning, including shell, it is provided with circuit board in shell, processor and storage are provided on the circuit board
Device, the memory are stored with computer program, and such as claim 1 is realized when the computer program is executed by the processor
To described in any one of 7 the step of air-conditioning anti-freezing method.
9. a kind of computer readable storage medium, is stored thereon with computer program, it is characterised in that: the computer program quilt
The step of controller realizes air-conditioning anti-freezing method as claimed in any of claims 1 to 7 in one of claims when executing.
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| CN111609665A (en) * | 2020-05-15 | 2020-09-01 | 珠海格力电器股份有限公司 | Defrosting control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113263885A (en) * | 2020-02-14 | 2021-08-17 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
| CN113263885B (en) * | 2020-02-14 | 2024-04-30 | 大众汽车股份公司 | Method for regulating a heat pump for a motor vehicle, heat pump for a motor vehicle and motor vehicle |
| CN111609665A (en) * | 2020-05-15 | 2020-09-01 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN111609665B (en) * | 2020-05-15 | 2021-12-07 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN115654661A (en) * | 2022-08-19 | 2023-01-31 | 珠海格力电器股份有限公司 | Air conditioner anti-freezing control method and air conditioner |
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