CN117419420A - Air conditioner freezing judgment method, processing method and air conditioner - Google Patents
Air conditioner freezing judgment method, processing method and air conditioner Download PDFInfo
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- CN117419420A CN117419420A CN202311537481.5A CN202311537481A CN117419420A CN 117419420 A CN117419420 A CN 117419420A CN 202311537481 A CN202311537481 A CN 202311537481A CN 117419420 A CN117419420 A CN 117419420A
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- 238000007710 freezing Methods 0.000 title claims abstract description 36
- 230000008014 freezing Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003672 processing method Methods 0.000 title claims abstract description 8
- 238000005057 refrigeration Methods 0.000 claims abstract description 11
- 238000007791 dehumidification Methods 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 9
- 238000010309 melting process Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 description 6
- 206010060904 Freezing phenomenon Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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- 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
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner freezing judging method, a processing method and an air conditioner, which comprise the steps of acquiring temperature values of an inner disc temperature sensor at fixed time intervals delta M in a first preset duration M1 under the condition that a precondition is met when the air conditioner operates in a preset refrigeration or dehumidification mode to obtain a temperature set T1, and judging whether all the temperature values in the temperature set T1 are larger than a first preset temperature T1; if yes, judging that the air conditioner is frozen, and starting the deicing treatment, wherein the method comprises the following steps of: s1: the compressor is stopped, the indoor fan continuously operates at the current rotating speed for a third preset duration M3; s2: and calculating the temperature difference between the temperature of the air inlet and the temperature of the air outlet of the indoor unit, and comparing the temperature difference with a temperature threshold. The invention solves the problems that the indoor unit in the prior art can only detect the temperature of the corresponding shunt by the inner disk temperature sensor to judge that the air conditioner is frozen, and the other shunt without the inner disk sensor of the indoor unit is difficult to accurately prevent freezing.
Description
Technical Field
The present invention relates to the field of air conditioning equipment detection technologies, and in particular, to an air conditioner freezing determination method, a processing method, and an air conditioner.
Background
When the air conditioner is in a refrigerating mode, when the environment of the outdoor unit is low, the indoor load demand is low, or when the refrigerant distribution of the indoor evaporator is uneven/the air quantity is uneven due to dirt blockage of the filter screen of the indoor unit, the indoor evaporator is possibly frosted and even frozen. In the prior art, the indoor coil temperature sensor is generally arranged in the middle of a certain path of the evaporator, but the evaporator is unevenly shunted to cause freezing of the indoor coil temperature sensor, at the moment, wind can pass through the non-freezing part of the evaporator to cause the temperature rise of the indoor coil, the sensor flow path is overheated, at the moment, the shunt is frozen, the freezing prevention protection program is not started, and the accurate freezing prevention protection cannot be performed.
Therefore, the indoor unit can only detect the temperature of the corresponding shunt by the inner disc temperature sensor to judge that the air conditioner is frozen, accurate anti-freezing protection is difficult to be carried out on other shunts which are not provided with the inner disc sensor of the indoor unit, the whole freezing condition of the air conditioner is difficult to be effectively judged, and the indoor evaporator is caused to freeze, so that the heat exchange efficiency of the air conditioner is affected.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an air conditioner freezing judging method, a processing method and an air conditioner, which solve the problems that in the prior art, an indoor unit can only detect the temperature of a corresponding shunt by an inner disc temperature sensor to judge that the air conditioner is frozen, other shunts without the inner disc sensor of the indoor unit are difficult to accurately prevent freezing, the integral freezing condition of the air conditioner is difficult to effectively judge, and an indoor evaporator is frozen, so that the heat exchange efficiency of the air conditioner is affected.
According to an embodiment of the invention, an air conditioner freezing judging method comprises the following steps:
when the air conditioner operates in a preset refrigeration or dehumidification mode, acquiring temperature values of an inner disc temperature sensor at fixed time intervals delta M in a first preset time length M1 under the condition that a preset condition is met, obtaining a temperature set T1, and judging whether all the temperature values in the temperature set T1 are larger than a first preset temperature T1;
if yes, judging that the air conditioner is frozen, starting the deicing treatment, and if not, controlling the air conditioner to normally operate.
Preferably, the preconditions include:
(1) The temperature value T2 of the outdoor temperature sensor is smaller than a second preset temperature T2;
(2) The continuous running time of the compressor is longer than a second preset time length M2;
if the preconditions (1) and (2) are satisfied, comparing the temperature set T1 with a first preset temperature T1, and judging whether to start deicing treatment according to a comparison result;
if either or both of the preconditions (1) and (2) are satisfied, the air conditioner continues to operate in a preset cooling or dehumidifying mode.
Preferably, the first preset temperature T1 is greater than the inner disc control temperature T3, and t1—t3=7℃.
Preferably, the temperature set t1= { T 1 ,T 2 ,……T n-1 ,T n (n-1) ×Δm=m1, when the temperature value T is obtained n+1 At the time, T is taken 1 And (5) removing the temperature set T1.
Preferably, each time a temperature value of the inner disk temperature sensor is obtained, the temperature value is stored in the temperature set T1, whether the temperature value is greater than the first preset temperature T1 is judged, if yes, only the temperature value is stored, and if not, the temperature value is marked and stored.
On the other hand, according to an embodiment of the present invention, there is also provided an air conditioner freezing processing method, adopting the above air conditioner freezing judging method, if it is judged that the air conditioner is frozen, performing ice-melting processing, including the steps of:
s1: the compressor is stopped, the indoor fan continuously operates at the current rotating speed for a third preset duration M3;
s2: and calculating the temperature difference between the temperature of the air inlet and the temperature of the air outlet of the indoor unit, comparing the temperature difference with a temperature threshold value, and starting different restarting modes.
Preferably, comparing the temperature difference with a temperature threshold, turning on the different restart modes comprises: if the temperature difference is smaller than or equal to the temperature threshold, immediately ending the deicing treatment, restarting the compressor, and carrying out normal refrigeration;
if the temperature difference is greater than the temperature threshold, continuing to execute the step S1, continuing to perform a fourth preset duration M4, acquiring the air inlet temperature and the air outlet temperature of the indoor unit in real time within the fourth preset duration M4, and repeating the step S2.
Preferably, if the temperature difference is still greater than the temperature threshold after the fourth preset time period M4 is full, the ice-melting process is automatically ended, the compressor is restarted, and normal refrigeration is performed.
On the other hand, according to the embodiment of the invention, there is also provided an air conditioner, including an indoor unit and an outdoor unit;
the indoor unit comprises an indoor fan, an evaporator, a controller, an inner disk temperature sensor, an air inlet temperature sensor and an air outlet temperature sensor;
the outdoor unit comprises a compressor and an outdoor temperature sensor;
the controller is capable of executing the air conditioner freezing judgment method and the air conditioner freezing processing method described above.
Compared with the prior art, the invention has the following beneficial effects:
under the condition that the outdoor temperature, the compressor running time and the running mode are all met, whether the shunt without the inner disc temperature sensor is frozen or not is judged by taking the control temperature of the inner disc temperature sensor and 7 ℃ as judging basis so as to effectively judge the whole freezing condition of the air conditioner, meanwhile, the output of the compressor is stopped during the ice melting period, cold air blowing is carried out indoors by utilizing the low-temperature energy frozen by the evaporator, the freezing release of the evaporator is judged, the compressor is started in time, the whole process is blown out as cold air, and the use comfort of a user can be ensured while electricity is saved.
Drawings
Fig. 1 is a flowchart of a method for determining icing of an air conditioner according to an embodiment of the present invention.
Fig. 2 is a flowchart of an ice-melting process according to an embodiment of the present invention.
Fig. 3 is a block diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1 and fig. 2, an embodiment of the present invention provides an air conditioner freezing determination method, including:
when the air conditioner is in a preset refrigeration or dehumidification mode and the indoor evaporator is partially frosted, if the frosted part is in a shunt with an inner disc temperature sensor, in the shunt, the temperature rises to the control temperature T3 of the inner disc, and the controller of the air conditioner immediately performs frequency-reducing shutdown on the air conditioner according to a preset anti-freezing protection program.
If the frosting part is a shunt without the inner disc temperature sensor, the air conditioner controller cannot judge that the evaporator frosts, after the continuous operation, the frosting part is aggravated until the evaporator is frozen, at the moment, wind can pass through the part of the evaporator which is not frosted, so that the temperature of the inner disc is increased, and the larger the icing area of the evaporator is, the higher the temperature of the inner disc is, therefore, in the shunt with the inner disc sensor, the temperature detected by the inner disc temperature sensor is higher than the frozen shunt temperature, and when the temperature in the shunt with the inner disc temperature sensor is increased to the control temperature T3, the temperature warning information is sent out by the inner disc temperature sensor, but the shunt is not frozen, the controller cannot implement an anti-freezing program, so that the anti-freezing protection program is invalid, and the whole freezing condition of the air conditioner cannot be effectively judged.
Thus, the first preset temperature T1 for the inner disc temperature sensor is greater than the normal inner disc control temperature T3, and T1-t3=7 ℃, e.g., the control temperature T3 for the normal inner disc is 9 ℃, the first preset temperature T1 is 9+7=16 ℃.
When the air conditioner is in a preset refrigeration or dehumidification mode and the temperature value detected by the inner disc temperature sensor is larger than T1 for the first time, the controller starts to acquire the temperature value T2 of the outdoor temperature sensor and the continuous operation time of the compressor, if T2<At 30 ℃ and for a duration of operation of the compressor exceeding 30 minutes, the controller creates a temperature set T1, acquires all the temperature values of the inner disc temperature sensor within a first preset duration M1 at fixed time intervals Δm (for example 30S, but not too short or too long) and stores them in the temperature set T1, wherein M1 is 10 minutes, after which 10 minutes the temperature set t1= { T 1 ,T 2 ,……T n-1 ,T n (n-1) ×Δm=m1, and if the temperature set T1 is full, obtaining the next temperature value T n+1 At the time, T is taken 1 Culling from the temperature set T1, at which time t1= { T 2 ,T 3 ,……T n ,T n+1 During the running process of the air conditioner, the radiator is continuously operated, and the temperature inside the air conditioner is always in a fluctuation state, so that the T2 can not be satisfied<Under the conditions that the temperature of the inner disc exceeds t1 under the conditions that the temperature is 30 ℃ and the continuous working time of the compressor exceeds 30 minutes, the freezing phenomenon in the air conditioner is immediately judged, and the air conditioner needs to be continuously monitored within a certain period of time.
In the process of acquiring the temperature value detected by the inner disk temperature sensor and storing the temperature value into the temperature set T1, the following cases may occur:
(1) Within 10 minutes, one or more temperature values less than T1 appear in all the temperature values in the temperature set T1, with the remaining temperature values being greater than T1.
(2) Within 10 minutes, all temperature values in the temperature set T1 are greater than T1.
In the two cases, the air conditioner controller does not judge that the air conditioner is frozen in the case (1), because the temperature in the air conditioner is fluctuated, the time is high and low, the temperature of the inner tray is fluctuated near the first preset temperature t1, the air conditioner is not judged to be frozen at the moment, but the monitoring is required to be enhanced, a certain frosting risk exists, the more the temperature value smaller than t1 is, the larger the frosting risk is, and if the case (2) is occurred, the freezing phenomenon of the air conditioner is judged to occur.
In addition, as time goes by, the temperature value of the inner disc temperature sensor is always obtained, the temperature set T1 data is always replaced, when judging whether the temperature value in the temperature set T1 is greater than the first preset temperature T1, in order to improve efficiency, when the temperature value of the inner disc temperature sensor is obtained each time, the temperature value is compared with the first preset temperature T1, if the temperature value is greater than T1, the temperature value is only stored in the temperature set T1, otherwise, the temperature value is required to be marked and then stored in the temperature set T1, and then whether the air conditioner is frozen is judged, and only whether the temperature set T1 is provided with the marked temperature value is judged in real time, and all the temperature values in the whole temperature set T1 are compared with T1 without storing new temperature values each time, so long as the temperature value which is not marked in the temperature set T1, the situation (2) can be directly judged, and the air conditioner is frozen, and at this time, the air conditioner controller starts the deicing process.
Therefore, under the condition that the outdoor temperature, the running time of the compressor and the running mode meet the conditions, whether the shunt without the inner disc temperature sensor is frozen or not is judged through the inner disc temperature sensor, and the whole freezing condition of the air conditioner can be effectively judged.
After the air conditioner is frozen, the controller starts to control the partial period of the air conditioner to start deicing treatment, the controller controls the compressor to stop, the indoor fan continues to run continuously at the current rotating speed, after a third preset time length M3 (generally set to 5 minutes), the air inlet temperature and the air outlet temperature are obtained through the air inlet temperature sensor and the air outlet temperature sensor, the temperature difference value (the air inlet temperature minus the air outlet temperature) between the air inlet temperature and the air outlet temperature is calculated, and the temperature difference value is compared with a preset temperature threshold (generally set to 1 ℃):
if the temperature difference is smaller than or equal to the temperature threshold, the temperature difference indicates that the temperature of the air inlet and the temperature of the air outlet of the indoor unit are close, the evaporator is judged to be frozen and the deicing is finished, and then the deicing process is immediately finished, and the compressor is restarted to perform normal refrigeration;
if the temperature difference is larger than the temperature threshold value, the temperature difference between the air inlet temperature and the air outlet temperature of the indoor unit is indicated to be still large, ice melting processing is continuously performed, the compressor is continuously stopped and the indoor fan is continuously operated at the current rotating speed, meanwhile, a fourth preset time length M4 (generally set to be 10 minutes) is preset, the air inlet temperature and the air outlet temperature of the indoor unit are obtained in real time within 10 minutes, the temperature difference between the air inlet temperature and the air outlet temperature of the indoor unit is calculated and compared with the temperature threshold value, if the temperature difference is smaller than or equal to the temperature threshold value for less than 10 minutes, ice melting processing is immediately finished, if the temperature difference is still larger than the temperature threshold value for more than 10 minutes, ice melting processing is finished by default, ice melting processing is automatically finished, and the compressor is restarted for normal refrigeration.
In addition, the output of the compressor is stopped during the ice melting period, cold air is blown into a room by utilizing the low-temperature energy frozen by the evaporator, the freezing release of the evaporator is judged, the compressor is started in time, the cold air is blown out in the whole process, and the comfort level of the user can be ensured while electricity is saved.
Example 2:
as shown in fig. 3, an embodiment of the present invention provides an air conditioner, including an indoor unit and an outdoor unit;
the indoor unit comprises an indoor fan, an evaporator, a controller, an inner disk temperature sensor, an air inlet temperature sensor and an air outlet temperature sensor, wherein the inner disk temperature sensor, the air inlet temperature sensor and the air outlet temperature sensor are respectively used for measuring the inner disk temperature, the air inlet temperature and the air outlet temperature of the indoor unit;
the outdoor unit comprises a compressor and an outdoor temperature sensor, and the outdoor temperature sensor is used for measuring the outdoor temperature;
the controller is electrically connected to all the components in the indoor unit and the outdoor unit, is used for the controller to operate or receive related data, and is capable of executing the air conditioner freezing judgment method and the air conditioner freezing treatment method described in embodiment 1.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (9)
1. A freezing judgment method of an air conditioner is characterized in that: the method comprises the following steps:
when the air conditioner operates in a preset refrigeration or dehumidification mode, acquiring temperature values of an inner disc temperature sensor at fixed time intervals delta M in a first preset time length M1 under the condition that a preset condition is met, obtaining a temperature set T1, and judging whether all the temperature values in the temperature set T1 are larger than a first preset temperature T1;
if yes, judging that the air conditioner is frozen, starting the deicing treatment, and if not, controlling the air conditioner to normally operate.
2. The air conditioner freeze judging method as set forth in claim 1, wherein: the preconditions include:
(1) The temperature value T2 of the outdoor temperature sensor is smaller than a second preset temperature T2;
(2) The continuous running time of the compressor is longer than a second preset time length M2;
if the preconditions (1) and (2) are satisfied, comparing the temperature set T1 with a first preset temperature T1, and judging whether to start deicing treatment according to a comparison result;
if either or both of the preconditions (1) and (2) are satisfied, the air conditioner continues to operate in a preset cooling or dehumidifying mode.
3. The air conditioner freeze judging method as set forth in claim 1, wherein:
the first preset temperature T1 is greater than the inner disc control temperature T3, and T1-t3=7 ℃.
4. The air conditioner freeze judging method as set forth in claim 1, wherein: the temperature set t1= { T 1 ,T 2 ,……T n-1 ,T n (n-1) ×Δm=m1, when the temperature value is obtainedT n+1 At the time, T is taken 1 And (5) removing the temperature set T1.
5. The air conditioner freeze judging method as set forth in claim 4, wherein: and when the temperature value of the inner disc temperature sensor is obtained each time, storing the temperature value into a temperature set T1, judging whether the temperature value is larger than a first preset temperature T1, if so, only storing, and if not, marking and storing the temperature value.
6. An air conditioner freezing treatment method adopting the air conditioner freezing judgment method as defined in claims 1-6, characterized in that: if the air conditioner is judged to be frozen, carrying out ice-melting treatment, wherein the ice-melting treatment comprises the following steps of:
s1: the compressor is stopped, the indoor fan continuously operates at the current rotating speed for a third preset duration M3;
s2: and calculating the temperature difference between the temperature of the air inlet and the temperature of the air outlet of the indoor unit, comparing the temperature difference with a temperature threshold value, and starting different restarting modes.
7. The freezing treatment method of air conditioner as claimed in claim 6, wherein: comparing the temperature difference to a temperature threshold, starting different restart modes includes: if the temperature difference is smaller than or equal to the temperature threshold, immediately ending the deicing treatment, restarting the compressor, and carrying out normal refrigeration;
if the temperature difference is greater than the temperature threshold, continuing to execute the step S1, continuing to perform a fourth preset duration M4, acquiring the air inlet temperature and the air outlet temperature of the indoor unit in real time within the fourth preset duration M4, and repeating the step S2.
8. The freezing treatment method of air conditioner as claimed in claim 7, wherein: if the temperature difference is still greater than the temperature threshold after the fourth preset time period M4 is full, automatically ending the ice-melting process, restarting the compressor, and performing normal refrigeration.
9. An air conditioner, characterized in that: comprises an indoor unit and an outdoor unit;
the indoor unit comprises an indoor fan, an evaporator, a controller, an inner disk temperature sensor, an air inlet temperature sensor and an air outlet temperature sensor;
the outdoor unit comprises a compressor and an outdoor temperature sensor;
the controller is capable of executing the air conditioner freezing judgment method according to claims 1 to 5 and the air conditioner freezing processing method according to claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537481.5A CN117419420A (en) | 2023-11-16 | 2023-11-16 | Air conditioner freezing judgment method, processing method and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537481.5A CN117419420A (en) | 2023-11-16 | 2023-11-16 | Air conditioner freezing judgment method, processing method and air conditioner |
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| CN117419420A true CN117419420A (en) | 2024-01-19 |
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| CN202311537481.5A Pending CN117419420A (en) | 2023-11-16 | 2023-11-16 | Air conditioner freezing judgment method, processing method and air conditioner |
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| Country | Link |
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| CN (1) | CN117419420A (en) |
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- 2023-11-16 CN CN202311537481.5A patent/CN117419420A/en active Pending
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