CN110953689A - Air conditioner anti-freezing protection method and device and air conditioner - Google Patents
Air conditioner anti-freezing protection method and device and air conditioner Download PDFInfo
- Publication number
- CN110953689A CN110953689A CN201911113607.XA CN201911113607A CN110953689A CN 110953689 A CN110953689 A CN 110953689A CN 201911113607 A CN201911113607 A CN 201911113607A CN 110953689 A CN110953689 A CN 110953689A
- Authority
- CN
- China
- Prior art keywords
- temperature
- wind speed
- freezing protection
- air conditioner
- superheat degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- 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)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a method and a device for preventing freezing of an air conditioner and the air conditioner. The method comprises the following steps: acquiring the current coil temperature of the air conditioner; under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, the wind speed of the fan is increased from a first wind speed to a second wind speed, and the difference between the obtained current return air temperature and the current coil temperature is determined as a first superheat degree and stored; and under the condition that the fan operates at the second wind speed, determining the difference between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree, adjusting the preset anti-freezing protection temperature under the condition that the absolute value of the superheat difference between the first superheat degree and the second superheat degree is larger than a second set value, and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature. Therefore, the accuracy of the anti-freezing protection of the air conditioner is improved.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for preventing freezing of an air conditioner and the air conditioner.
Background
With the development of artificial intelligence technology, air conditioners are more and more intelligent. When the air conditioner is used, in order to prevent the evaporator from freezing due to the excessively low temperature of the evaporator or liquid refrigerant from entering the compressor to cause liquid impact damage to the compressor when the air conditioner is in a refrigeration or dehumidification mode, anti-freezing protection is usually performed.
Currently, freeze protection may include: and setting a plurality of anti-freezing protection temperatures, entering different treatment stages of anti-freezing protection when the coil pipe sensor detects that different anti-freezing protection temperatures are reached, and reducing the frequency of the compressor or stopping the compressor. And when the temperature of the coil pipe rises to different recovery temperatures, the refrigeration or dehumidification operation is recovered. However, the number of the evaporator branches is N (N is more than or equal to 2), the number of the indoor unit evaporator coils is only one, and when the indoor unit evaporator has differences of components, air volume distribution, processing consistency and the like, actual temperature distribution of each flow path branch has larger difference, so that the detected coil temperature cannot reflect the integral icing condition of the evaporator, and the refrigeration and dehumidification effects are influenced or the indoor unit is damaged due to too large icing and dropping.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for protecting freezing prevention of an air conditioner and the air conditioner, and aims to solve the technical problem that the accuracy of freezing prevention protection of the air conditioner is not high.
In some embodiments, the method comprises:
acquiring the current coil temperature of the air conditioner;
under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, the wind speed of the fan is increased from a first wind speed to a second wind speed, and the difference between the obtained current return air temperature and the current coil temperature is determined as a first superheat degree and stored;
and under the condition that the fan operates at the second wind speed, determining the difference between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree, adjusting the preset anti-freezing protection temperature under the condition that the absolute value of the superheat difference between the first superheat degree and the second superheat degree is larger than a second set value, and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
In some embodiments, the apparatus comprises:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is configured to acquire the current coil temperature of the air conditioner;
the lifting module is configured to increase the wind speed of the fan from a first wind speed to a second wind speed under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, and determine and store the obtained difference between the current return air temperature and the current coil temperature as a first superheat degree;
the first protection module is configured to determine a difference value between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree under the condition that the fan operates at the second wind speed, adjust the preset anti-freezing protection temperature under the condition that an absolute value of an superheat difference value between the first superheat degree and the second superheat degree is larger than a second set value, and perform anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
In some embodiments, the apparatus comprises a processor and a memory storing program instructions, the apparatus comprising: a processor and a memory storing program instructions, the processor being configured to execute the above-mentioned air conditioner anti-freeze protection method when executing the program instructions
In some embodiments, the air conditioner includes: the anti-freezing protection device for the air conditioner comprises the anti-freezing protection device for the air conditioner.
The method and the device for protecting the air conditioner from freezing and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:
after the temperature of a coil pipe of the air conditioner reaches the preset anti-freezing protection temperature, the air speed of a fan of the air conditioner can be increased, the air quantity is increased, the condition that the distribution of an evaporator of the air conditioner is uneven is determined under the condition that the superheat degree is greatly changed after the air quantity is increased, and the preset anti-freezing protection temperature needs to be adjusted.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
FIG. 1 is a schematic flow chart illustrating a method for protecting an air conditioner from freezing in an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a method for protecting an air conditioner from freezing in an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart illustrating a method for protecting an air conditioner from freezing in an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of an anti-freezing protection device of an air conditioner according to an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of an anti-freezing protection device of an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of an air conditioner anti-freezing protection device according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The air conditioner has an anti-freezing protection function, in the embodiment of the disclosure, after the temperature of a coil of the air conditioner reaches a preset anti-freezing protection temperature, a corresponding anti-freezing protection strategy is not executed immediately, but the air speed of a fan of the air conditioner is increased, and the air volume is increased, so that if the superheat degree is changed greatly after the air volume is increased, the uneven distribution of an evaporator of the air conditioner can be determined, at this time, the preset anti-freezing protection temperature in the anti-freezing protection strategy needs to be adjusted, and according to the adjusted preset anti-freezing protection temperature, when the corresponding anti-freezing protection strategy is executed, the risk of freezing of the evaporator or the condition of poor operation effect of the air conditioner can be reduced, the accuracy of the anti-freezing protection of the air conditioner is improved, and the intelligence of the.
Fig. 1 is a schematic flow chart of an air conditioner anti-freezing protection method in an embodiment of the present disclosure. As shown in fig. 1, the process of air conditioner freeze protection may include:
step 101: and acquiring the current coil temperature of the air conditioner.
In the embodiment of the disclosure, the evaporator of the air conditioner is divided into N paths (N is more than or equal to 2), and only one indoor unit evaporator coil is provided, so that the temperature of the coil can be collected in real time or at regular time, the temperature collected each time is the current temperature of the coil, and the temperature can be collected through a corresponding temperature sensor.
Step 102: and under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, the wind speed of the fan is increased from a first wind speed to a second wind speed, and the obtained difference between the current return air temperature and the current coil temperature is determined as a first superheat degree and stored.
The air conditioner has an anti-freezing function, and in the related anti-freezing protection strategies of the air conditioner, when the current temperature reaches the preset anti-freezing protection temperature, the corresponding anti-freezing protection strategy can be executed.
Table 1 shows a corresponding relationship between a coil temperature range formed by a preset anti-freezing protection temperature and an anti-freezing protection strategy in the embodiment of the present disclosure.
TABLE 1
In table 1, the first temperature, the second temperature, the third temperature, and the fourth temperature are all preset anti-freezing protection temperatures, the first temperature is less than the second temperature, the second temperature is less than the third temperature, and the third temperature is less than the fourth temperature. As shown in table 1, each anti-freezing protection strategy executed by the air conditioner is related to the corresponding preset anti-freezing protection temperature, and the corresponding anti-freezing protection strategy is executed when the temperature of the coil reaches the corresponding preset anti-freezing protection temperature. Of course, there are various specific strategies in the anti-freezing protection function of the air conditioner, but any one of the strategies is related to the preset anti-freezing protection temperature, so that if the current coil temperature reaches the preset anti-freezing protection temperature, corresponding processing can be performed. Generally, in order to improve the fault tolerance of the air conditioner, if the difference between the current coil temperature and the preset anti-freezing protection temperature is within a certain range, it can be determined that the current coil temperature reaches the preset temperature. The difference between the current coil temperature and the preset anti-freezing protection temperature may be a positive value or a negative value, and therefore, an absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature may be compared with a set value, that is, the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, and it may be determined that the current coil temperature reaches the preset anti-freezing protection temperature. The first set value may be 0.1, 0.2, 0.3, 0.5, etc., which may be determined according to performance parameters of the air conditioner and the operation mode.
In the embodiment of the disclosure, when the temperature of the current coil reaches the preset anti-freezing protection temperature, the corresponding anti-freezing protection strategy is not executed immediately, but whether the corresponding anti-freezing protection strategy is executed is determined according to the superheat degree of the air conditioner after the air volume of the fan is increased.
For example: in the process of reducing the temperature of the coil, the absolute value of the difference between the current temperature of the coil and the fourth temperature is less than 0.2, that is, the current temperature of the coil reaches the fourth temperature can be determined, at this time, the compressor shown in table 1 is immediately executed to increase at a speed of 1HZ/10 seconds, but the compressor normally operates, and still performs the processes of refrigeration or defrosting, etc., however, the wind speed of the fan normally operating at the time of the air conditioner needs to be determined as a first wind speed, the wind speed of the fan needs to be increased from the first wind speed to a second wind speed, and a corresponding superheat degree needs to be stored, wherein the superheat degree is the difference between the return air temperature and the temperature of the coil. Therefore, the current return air temperature needs to be obtained, when the air conditioner operates, the compressor corresponds to the exhaust temperature and the return air temperature, when the coil temperature is determined to reach the preset anti-freezing protection temperature, the return air temperature can be collected, and the collected temperature is the current return air temperature.
The current coil temperature is obtained in the above steps, and therefore, in the case that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than the first set value, the difference between the current return air temperature obtained at this time and the current coil temperature is determined as the first superheat degree and stored, the first superheat degree △ t1 is Th 1-tp1. th1, Tp1 is the current return air temperature and the current coil temperature obtained in the case that the fan operates at the first air speed, respectively, and when the current return air temperature is collected, the current coil temperature still needs to reach the preset anti-freezing protection temperature.
The first wind speed is the current wind speed of the corresponding fan when the temperature of the current coil pipe reaches the preset anti-freezing protection temperature, and a lifting wind speed amplitude can be preset, so that the sum of the current wind speed and the lifting wind speed amplitude is the second wind speed.
Step 103: and under the condition that the fan operates at a second wind speed, determining the difference between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree, adjusting the preset anti-freezing protection temperature under the condition that the absolute value of the superheat difference between the first superheat degree and the second superheat degree is larger than a second set value, and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
After the air conditioner increases the amount of wind, the fan was with the operation of second wind speed back promptly, can increase the coverage of air conditioner heat transfer effect at once, generally, if there is the uneven phenomenon of evaporimeter reposition of redundant personnel in the air conditioner, when the amount of wind increase, reposition of redundant personnel uneven degree can continue to increase, leads to the excessive heat change can be great. Therefore, it is still necessary to determine the amount of superheat first.
The current coil temperature obtained in step 101, at this time, the current return air temperature is also obtained, that is, the current coil temperature and the current return air temperature are obtained when the fan is operating at the second wind speed, at this time, a difference between the current return air temperature and the current coil temperature may be determined as a second superheat degree, △ t2 is Th2-Tp2, where Th2 and Tp2 are the current return air temperature and the current coil temperature obtained when the fan is operating at the second wind speed, respectively.
After the second superheat degree is determined, the second superheat degree needs to be compared with the stored first superheat degree, if the second superheat degree and the stored first superheat degree are changed greatly, the bypass of the evaporator is not uniform, at the moment, the preset anti-freezing protection temperature in the anti-freezing protection strategy needs to be adjusted, and then, corresponding anti-freezing protection operation is carried out according to the adjusted preset anti-freezing protection temperature.
A value, i.e., a second set value, may be preset, so that if the absolute value of the superheat difference △ t is △ t1- △ t2, i.e., the absolute value of the superheat difference, i.e., △ t, is greater than the second set value, it indicates that the evaporator is unevenly distributed, and at this time, the preset anti-freeze protection temperature in the anti-freeze protection strategy needs to be adjusted.
In some embodiments, when the absolute value of △ t is greater than the second set value, if △ t is positive, that is, the first superheat degree is greater than the second superheat degree, it indicates that the evaporator coil is in a flow path with a low refrigerant liquid content, and at this time, there is a risk that the evaporator freezes too much and even falls off, and the preset anti-freezing protection temperature needs to be increased by the first set temperature.
In some embodiments, when the absolute value of △ t is greater than the second set value, if △ t is a negative value, that is, the first superheat degree is less than the second superheat degree, it indicates that the evaporator coil has a flow path with a large amount of refrigerant liquid, and at this time, there is a risk of poor air conditioning operation effect, and the preset anti-freezing protection temperature needs to be decreased by the second set temperature.
In the embodiment of the present disclosure, the first set temperature and the second set temperature may be determined according to performance parameters of the air conditioner and an installation environment. The first set temperature and the second set temperature may or may not be equal.
Of course, after the preset anti-freezing protection temperature is adjusted, the anti-freezing protection operation can be performed according to the adjusted preset anti-freezing protection temperature.
Table 2 is a corresponding relationship between the temperature range of the coil pipe formed by the adjusted preset anti-freezing protection temperature and the anti-freezing protection strategy in the embodiment of the present disclosure.
TABLE 2
As shown in table 2, the preset anti-freeze protection temperature is adjusted, so that during the gradual decrease of the coil temperature, if the obtained current coil temperature reaches (the second temperature +1), the strategy of decreasing the compressor at a speed of 1HZ/10 seconds can be executed. The method comprises the steps of acquiring the temperature of a coil in real time or at regular time in the operation process of the air conditioner, determining the acquired temperature of the coil corresponding to the temperature range of the coil, wherein the temperature range of the coil is formed according to the adjusted preset anti-freezing protection temperature, and further determining and executing a corresponding anti-freezing protection strategy.
It can be seen that, in this embodiment, after the temperature of the coil of the air conditioner reaches the preset anti-freezing protection temperature, the corresponding anti-freezing protection strategy is not executed immediately, but the air speed of the air conditioner fan is increased to increase the air volume, so that if the superheat degree changes greatly after the air volume is increased, it can be determined that the evaporator of the air conditioner has uneven flow distribution, at this time, the preset anti-freezing protection temperature in the anti-freezing protection strategy needs to be adjusted, and according to the adjusted preset anti-freezing protection temperature, when the corresponding anti-freezing protection strategy is executed, the risk of freezing the evaporator or the condition of poor operation effect of the air conditioner can be reduced, the accuracy of the anti-freezing protection of the air conditioner is improved, and the intelligence of the air conditioner is further improved.
Of course, after the air volume is increased, if the change of the overheating volume is not large, the phenomenon that the evaporator in the air conditioner is not uniformly distributed is not obvious, and at the moment, the corresponding anti-freezing protection strategy in the anti-freezing function of the air conditioner can be immediately executed. In some embodiments, when the fan operates at the second wind speed and the absolute value of the superheat difference is less than or equal to the second set value, the anti-freezing protection operation is performed according to the preset anti-freezing protection temperature.
For example, when the absolute value of △ t is less than or equal to the second set value, the corresponding anti-freeze protection strategy can be determined and operated according to table 1.
△ t is greater than the second setting value, since △ t is negative, namely the first superheat degree is less than the second superheat degree, it indicates that the evaporator coil has a flow path with a large amount of liquid in the refrigerant, at this time, there is a risk of poor air conditioner operation effect, the pre-set anti-freezing protection temperature is lowered to the second setting temperature, so as to reduce the rate of poor air conditioner operation effect, in order to further improve the air conditioner cooling or dehumidifying effect, in some embodiments, the pre-set anti-freezing protection temperature is lowered to the second setting temperature, the operation time is recorded, and the wind speed of the fan is raised to a third wind speed when the operation time is greater than the setting time, wherein the third wind speed is greater than the first wind speed.
For example: after the preset anti-freezing protection temperature is reduced by 2.5 degrees, the running time is recorded, if the recorded running time is more than the set time for five minutes, the wind speed of the fan can be increased to a third wind speed, the evaporating pressure of the evaporator can be increased through the high wind running of the fan, and therefore the freezing risk can be reduced.
Of course, after the air-conditioning fan operates at the second air speed, whether the anti-freezing protection operation is performed according to the adjusted preset anti-freezing protection temperature or the original preset anti-freezing protection temperature, the air speed of the fan needs to be reduced from the second air speed to the first air speed. Namely, when the anti-freezing protection operation is carried out, the wind speed of the fan is reduced from the second wind speed to the first wind speed, so that the fan can be recovered to be in normal operation, and high wind detection is not needed.
The following operational flows are integrated into the specific embodiment to illustrate the air conditioner anti-freezing protection process provided by the embodiment of the present invention.
In an embodiment of the present disclosure, the air conditioner has an anti-freezing protection function, and can store a corresponding relationship between a coil temperature range formed by preset anti-freezing protection temperatures and an anti-freezing protection strategy as shown in table 1.
Fig. 2 is a schematic flow chart of an air conditioner anti-freezing protection method in the embodiment of the disclosure. As shown in fig. 2, the process of air conditioner freeze protection may include:
step 201: and acquiring the current coil temperature of the air conditioner.
The current coil temperature of the air conditioner can be acquired in real time or in timing.
Step 202: is the absolute value of the difference between the current coil temperature and the preset freeze protection temperature less than 0.5? If so, go to step 203, otherwise, go to step 204.
In this embodiment, the first set value is 0.5, and the preset anti-freezing protection temperature may be the first temperature, the second temperature, the third temperature, or the fourth temperature.
And 203, increasing the wind speed of the air conditioner fan from the first wind speed to the second wind speed, acquiring the current return air temperature, determining the difference between the current return air temperature and the current coil temperature as a first superheat degree △ t1, storing, and returning to the step 201.
Step 204: determine whether the wind speed of the wind turbine is the second wind speed? If yes, go to step 205, otherwise, go back to step 201.
The wind speed is the second wind speed, namely the wind volume is increased, so that the anti-freezing protection strategy needs to be adjusted according to the difference between the overheating quantities.
And 205, acquiring the current return air temperature, and determining the difference between the current return air temperature and the current coil temperature as a second superheat degree △ t 2.
In step 206, it is determined whether the absolute value of the superheat difference △ t between the first superheat △ t1 and the second superheat △ t2 is greater than the second set value, if yes, go to step 207, otherwise go to step 211.
In step 207, it is determined whether the superheat difference △ t is greater than 0.
Step 208: the preset anti-freezing protection temperature is increased by 2 °, and the process proceeds to step 210.
Step 209: the preset anti-freezing protection temperature is reduced by 2 °, and the process proceeds to step 210.
Step 210: and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
Table 3 is a corresponding relationship between the temperature range of the coil formed by the adjusted preset anti-freezing protection temperature and the anti-freezing protection strategy in the embodiment of the present disclosure.
After the preset anti-freezing protection temperature is adjusted, if possible, the corresponding relationship between the coil temperature range formed by the adjusted preset anti-freezing protection temperature and the anti-freezing protection strategy is shown in table 3, and after the coil temperature reaches the adjusted preset anti-freezing protection temperature, the corresponding anti-freezing protection strategy can be determined according to table 3 and operated.
TABLE 3
Step 211: and performing anti-freezing protection operation according to the preset anti-freezing protection temperature.
△ t is less than or equal to the second set value, the corresponding anti-freeze protection strategy can be determined and run according to table 1.
Therefore, in this embodiment, after the temperature of the coil pipe of the air conditioner reaches the preset anti-freezing protection temperature, the air speed of the air conditioner fan can be increased, the air volume is increased, and under the condition that the superheat degree is greatly changed after the air volume is increased, it is determined that the evaporator of the air conditioner has the condition of uneven distribution, and the preset anti-freezing protection temperature needs to be adjusted.
In an embodiment of the present disclosure, the air conditioner has an anti-freezing protection function.
Fig. 3 is a schematic flow chart of a method for protecting freezing prevention of an air conditioner in an embodiment of the present disclosure. As shown in fig. 3, the process of air conditioner freeze protection may include:
step 301: and acquiring the current coil temperature of the air conditioner.
The current coil temperature of the air conditioner can be acquired in real time or in timing.
Step 302: is the absolute value of the difference between the current coil temperature and the preset freeze protection temperature less than 0.8? If so, go to step 303, otherwise, go to step 304.
And 303, increasing the wind speed of the air conditioner fan from the first wind speed to the second wind speed, acquiring the current return air temperature, determining the difference between the current return air temperature and the current coil temperature as a first superheat degree △ t1, storing, and returning to 301.
The first wind speed is the current wind speed of the corresponding fan when the current temperature of the coil pipe reaches the preset anti-freezing protection temperature, and the second wind speed is the sum of the first wind speed and the preset lifting wind speed amplitude.
Step 304: is the wind speed of the wind turbine determined to be operating at the second wind speed? If yes, go to step 305, otherwise, go back to step 301.
And 305, acquiring the current return air temperature, and determining the difference between the current return air temperature and the current coil temperature as a second superheat degree △ t 2.
And (6) judging 306 whether the absolute value of the superheat difference value △ t between the first superheat degree △ t1 and the second superheat degree △ t2 is larger than a second set value, if so, executing step 307, and otherwise, executing step 314.
In step 307, it is determined whether the superheat difference △ t is greater than 0.
Step 308: the preset anti-freezing protection temperature is increased by 2 °, and the process proceeds to step 310.
Step 309: the preset anti-freezing protection temperature is reduced by 2 °, and the process proceeds to step 311.
Step 310: and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature, and reducing the wind speed of the fan from the second wind speed to the first wind speed.
Step 311: and carrying out anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature, reducing the wind speed of the fan from the second wind speed to the first wind speed, and recording the operation time of the air conditioner after the preset anti-freezing protection temperature is reduced by 2 degrees.
Step 312: determine if the run time is greater than 5 minutes? If yes, go to step 313, otherwise, go back to step 311.
Step 313: the wind speed of the fan is increased from the first wind speed to a third wind speed.
Step 314: and performing anti-freezing protection operation according to the preset anti-freezing protection temperature, and reducing the wind speed of the fan from the second wind speed to the first wind speed.
It can be seen that, in this embodiment, after the temperature of the coil of the air conditioner reaches the preset anti-freezing protection temperature, the air speed of the air conditioner fan can be increased, the air volume is increased, and under the condition that the superheat degree is greatly changed after the air volume is increased, it is determined that the evaporator of the air conditioner has a non-uniform distribution condition, and the preset anti-freezing protection temperature needs to be adjusted, so that the risk of freezing the evaporator can be reduced when a corresponding anti-freezing protection strategy is executed according to the adjusted preset anti-freezing protection temperature, and the evaporation pressure of the evaporator can be increased by the high-wind operation of the fan when the refrigerant liquid is distributed in a flow path with a large number of liquid.
According to the process of the air conditioner anti-freezing protection, the device for the air conditioner anti-freezing protection can be constructed.
Fig. 4 is a schematic structural diagram of an air conditioner anti-freezing protection device provided by the embodiment of the disclosure. As shown in fig. 4, the air conditioner anti-freezing protection device includes: an acquisition module 410, a lifting module 420, and a first protection module 430.
An obtaining module 410 configured to obtain a current coil temperature of the air conditioner.
And the lifting module 420 is configured to, when the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, increase the wind speed of the fan from a first wind speed to a second wind speed, and determine and store the obtained difference between the current return air temperature and the current coil temperature as a first superheat degree.
The first protection module 430 is configured to determine a difference between the acquired current return air temperature and the current coil temperature as a second superheat degree when the fan operates at the second air speed, adjust the preset anti-freezing protection temperature when an absolute value of an superheat difference between the first superheat degree and the second superheat degree is greater than a second set value, and perform anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
In some embodiments, the first protection module 430 includes:
and the first adjusting unit is configured to increase the preset anti-freezing protection temperature by a first set temperature under the condition that the absolute value of the superheat difference value is greater than a second set value and the first superheat degree is greater than the second superheat degree.
And the second adjusting unit is configured to reduce the preset anti-freezing protection temperature by a second set temperature under the conditions that the absolute value of the superheat difference value is larger than a second set value and the first superheat degree is lower than the second superheat degree.
In some embodiments, the apparatus further comprises: the recording and lifting module is configured to record the running time after the preset anti-freezing protection temperature is reduced by a second set temperature; under the condition that the operation time is longer than the set time, the wind speed of the fan is increased to a third wind speed; wherein the third wind speed is greater than the first wind speed.
In some embodiments, further comprising: and the second protection module is configured to perform anti-freezing protection operation according to the preset anti-freezing protection temperature under the condition that the fan operates at the second wind speed and the absolute value of the superheat difference value is smaller than or equal to a second set value.
In some embodiments, the apparatus further comprises: and the reducing module is configured to reduce the wind speed of the fan from the second wind speed to the first wind speed when the anti-freezing protection operation is performed.
In the following, a self-cleaning process of an air conditioner controlled by the air conditioner anti-freezing protection device provided by the embodiment of the invention is illustrated with reference to specific embodiments.
In this embodiment, the air conditioner has an anti-freezing protection function.
Fig. 5 is a schematic structural diagram of an anti-freezing protection device of an air conditioner according to an embodiment of the disclosure. As shown in fig. 5, the air conditioner anti-freezing protection device includes: the obtaining module 410, the lifting module 420, and the first protecting module 430 may further include: the second protection includes 440, a lowering module 450, and a record lifting module 460. And the first protection module 430 further includes: a first adjusting unit 431 and a second adjusting unit 432.
Thus, under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than the first set value, namely when the current coil temperature reaches the preset anti-freezing protection temperature, the lifting module 420 can increase the air speed of the air conditioner from the first air speed to the second air speed, obtain the current return air temperature, and determine the difference between the current return air temperature and the current coil temperature as the first superheat degree △ t1 and store the difference.
When the wind speed of the fan is the second wind speed, the first protection module 430 may obtain the current return air temperature, determine the difference between the current return air temperature and the current coil temperature as the second superheat degree △ t2, and when the absolute value of the superheat difference △ t is greater than the second set value and △ t is greater than 0, the first adjustment unit 431 may increase the preset anti-freeze protection temperature by 2 degrees, and when the absolute value of the superheat difference △ t is greater than the second set value and △ t is less than 0, the second adjustment unit 432 may decrease the preset anti-freeze protection temperature by 2 degrees.
In addition, if △ t is less than 0, the recording and lifting module 460 can record the running time of the air conditioner after the preset anti-freezing protection temperature is reduced by 2 degrees, and increase the wind speed of the fan from the first wind speed to the third wind speed when the recorded running time is more than 5 minutes.
Of course, when the wind speed of the fan is running at the second wind speed and the absolute value of the overheat difference △ t is less than or equal to the second set value, the second protection module 440 may perform the anti-freeze protection operation according to the original preset anti-freeze protection temperature, and the reducing module 450 also reduces the wind speed of the fan from the second wind speed to the first wind speed.
In this embodiment, it can be seen that, after the temperature of the coil reaches the preset anti-freezing protection temperature, the air speed of the air-conditioning fan can be increased, the air quantity is increased, and under the condition that the superheat degree is greatly changed after the air quantity is increased, the condition that the evaporator of the air conditioner has uneven distribution is determined, the preset anti-freezing protection temperature needs to be adjusted, and therefore, according to the adjusted preset anti-freezing protection temperature, when a corresponding anti-freezing protection strategy is executed, the risk of freezing of the evaporator can be reduced, moreover, when the refrigerant liquid in the evaporator coil is in a flow path with a large amount of liquid, the high wind operation of the fan can improve the evaporation pressure of the evaporator, thus, the risk of icing of the evaporator is further reduced while the refrigeration or dehumidification effect of the air conditioner is ensured, and therefore, the accuracy of the anti-freezing protection of the air conditioner can be improved, and the intelligence of the air conditioner is further improved.
The embodiment of the disclosure provides an air conditioner anti-freezing protection device, which includes a processor and a memory storing program instructions, wherein the processor is configured to execute the air conditioner anti-freezing protection process when executing the program instructions.
The embodiment of the present disclosure provides an anti-freezing protection device for an air conditioner, the structure of which is shown in fig. 6, including:
a processor (processor)100 and a memory (memory)101, and may further include a Communication Interface (Communication Interface)102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to execute the air conditioner anti-freeze protection method according to any of the above embodiments.
In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions/modules stored in the memory 101 to execute the functional applications and data processing, that is, to implement the air conditioner anti-freezing protection method in any of the above method embodiments.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises any one of the air conditioner anti-freezing protection devices.
The embodiment of the disclosure provides a computer-readable storage medium, which stores computer-executable instructions configured to execute the air conditioner anti-freezing protection method in any one of the embodiments.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the air conditioner anti-freeze protection method of any of the above embodiments.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method of freeze protection for an air conditioner, the method comprising:
acquiring the current coil temperature of the air conditioner;
under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, the wind speed of the fan is increased from a first wind speed to a second wind speed, and the difference between the obtained current return air temperature and the current coil temperature is determined as a first superheat degree and stored;
and under the condition that the fan operates at the second wind speed, determining the difference between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree, adjusting the preset anti-freezing protection temperature under the condition that the absolute value of the superheat difference between the first superheat degree and the second superheat degree is larger than a second set value, and performing anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
2. The method of claim 1, wherein said adjusting said preset anti-freeze protection temperature comprises:
under the condition that the absolute value of the superheat difference value is larger than a second set value and the first superheat degree is larger than the second superheat degree, increasing the preset anti-freezing protection temperature to a first set temperature;
and under the condition that the absolute value of the superheat difference value is larger than a second set value and the first superheat degree is smaller than the second superheat degree, reducing the preset anti-freezing protection temperature to a second set temperature.
3. The method of claim 2, wherein after said reducing said preset anti-freeze protection temperature by a second set temperature, further comprising:
recording the running time;
under the condition that the operation time is longer than the set time, the wind speed of the fan is increased to a third wind speed;
wherein the third wind speed is greater than the first wind speed.
4. The method of claim 1, further comprising:
and under the condition that the fan operates at the second wind speed and the absolute value of the superheat difference value is smaller than or equal to a second set value, performing anti-freezing protection operation according to the preset anti-freezing protection temperature.
5. The method of claim 1 or 4, wherein said performing freeze protection operations further comprises:
reducing the wind speed of the wind turbine from the second wind speed to the first wind speed.
6. An apparatus for freeze protection of an air conditioner, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is configured to acquire the current coil temperature of the air conditioner;
the lifting module is configured to increase the wind speed of the fan from a first wind speed to a second wind speed under the condition that the absolute value of the difference between the current coil temperature and the preset anti-freezing protection temperature is smaller than a first set value, and determine and store the obtained difference between the current return air temperature and the current coil temperature as a first superheat degree;
the first protection module is configured to determine a difference value between the acquired current return air temperature and the current coil pipe temperature as a second superheat degree under the condition that the fan operates at the second wind speed, adjust the preset anti-freezing protection temperature under the condition that an absolute value of an superheat difference value between the first superheat degree and the second superheat degree is larger than a second set value, and perform anti-freezing protection operation according to the adjusted preset anti-freezing protection temperature.
7. The apparatus of claim 6, wherein the first protection module comprises:
a first adjusting unit configured to increase the preset anti-icing protection temperature by a first set temperature in a case where the absolute value of the superheat difference is greater than a second set value and the first superheat degree is greater than the second superheat degree;
a second adjusting unit configured to lower the preset anti-freeze protection temperature by a second set temperature in a case where the absolute value of the superheat difference is larger than a second set value and the first superheat degree is at the second superheat degree.
8. The apparatus of claim 6, further comprising:
and the second protection module is configured to perform anti-freezing protection operation according to the preset anti-freezing protection temperature under the condition that the fan operates at the second wind speed and the absolute value of the superheat difference value is smaller than or equal to a second set value.
9. An apparatus for air conditioner freeze protection, comprising a processor and a memory storing program instructions, the processor being configured to perform the method of any one of claims 1 to 5 when executing the program instructions.
10. An air conditioner characterized by comprising the device of claim 6 or 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113607.XA CN110953689B (en) | 2019-11-14 | 2019-11-14 | Air conditioner anti-freezing protection method and device and air conditioner |
| PCT/CN2020/093276 WO2021093310A1 (en) | 2019-11-14 | 2020-05-29 | Freezing-prevention protection method and apparatus for air conditioner, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911113607.XA CN110953689B (en) | 2019-11-14 | 2019-11-14 | Air conditioner anti-freezing protection method and device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110953689A true CN110953689A (en) | 2020-04-03 |
| CN110953689B CN110953689B (en) | 2021-08-24 |
Family
ID=69977298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911113607.XA Active CN110953689B (en) | 2019-11-14 | 2019-11-14 | Air conditioner anti-freezing protection method and device and air conditioner |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110953689B (en) |
| WO (1) | WO2021093310A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111578415A (en) * | 2020-05-25 | 2020-08-25 | 广东美的制冷设备有限公司 | Radiation air conditioner and compressor protection control method and device |
| CN112556095A (en) * | 2020-11-25 | 2021-03-26 | 郑州海尔空调器有限公司 | Method and device for preventing air conditioner evaporator from freezing and air conditioner |
| WO2021093310A1 (en) * | 2019-11-14 | 2021-05-20 | 青岛海尔空调器有限总公司 | Freezing-prevention protection method and apparatus for air conditioner, and air conditioner |
| WO2023093048A1 (en) * | 2021-11-25 | 2023-06-01 | 青岛海尔空调器有限总公司 | Method and apparatus for protecting coil, and air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289618B (en) * | 2022-08-19 | 2024-06-11 | 宁波奥克斯电气股份有限公司 | Air conditioner control method, device, air conditioner and computer readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000006957A2 (en) * | 1998-07-29 | 2000-02-10 | Hebert Thomas H | Dual evaporator for indoor units and method therefor |
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
| CN106288180A (en) * | 2016-08-12 | 2017-01-04 | 青岛海尔空调器有限总公司 | A kind of control method for air-conditioning, device and air-conditioning |
| CN106403041A (en) * | 2016-10-27 | 2017-02-15 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN107152758A (en) * | 2017-05-22 | 2017-09-12 | 广东美的制冷设备有限公司 | Air conditioner anti-freeze protects control method and device |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100507384C (en) * | 2005-09-01 | 2009-07-01 | 珠海格力电器股份有限公司 | Method of preventing indoor heat exchanger bursting by freezing and air cooling cold water set using said method |
| CN102345915B (en) * | 2011-08-02 | 2013-11-27 | 宁波奥克斯电气有限公司 | Fault operation control method of DC (direct current) convertible frequency air conditioner |
| JP5979112B2 (en) * | 2013-09-30 | 2016-08-24 | ダイキン工業株式会社 | Refrigeration equipment |
| CN106369771A (en) * | 2016-10-31 | 2017-02-01 | 芜湖美智空调设备有限公司 | Control method and control device for air conditioner freezing prevention as well as air conditioner |
| CN108317667B (en) * | 2018-01-22 | 2020-12-29 | 青岛海尔空调器有限总公司 | Method and device for detecting icing of air conditioner indoor unit |
| CN108317669B (en) * | 2018-02-14 | 2020-08-25 | 青岛海尔空调器有限总公司 | Anti-freezing control method for indoor unit of air conditioner |
| CN109631233B (en) * | 2018-11-27 | 2021-07-06 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting judgment method and system |
| CN110953689B (en) * | 2019-11-14 | 2021-08-24 | 合肥海尔空调器有限公司 | Air conditioner anti-freezing protection method and device and air conditioner |
-
2019
- 2019-11-14 CN CN201911113607.XA patent/CN110953689B/en active Active
-
2020
- 2020-05-29 WO PCT/CN2020/093276 patent/WO2021093310A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000006957A2 (en) * | 1998-07-29 | 2000-02-10 | Hebert Thomas H | Dual evaporator for indoor units and method therefor |
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
| CN106288180A (en) * | 2016-08-12 | 2017-01-04 | 青岛海尔空调器有限总公司 | A kind of control method for air-conditioning, device and air-conditioning |
| CN106403041A (en) * | 2016-10-27 | 2017-02-15 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN107152758A (en) * | 2017-05-22 | 2017-09-12 | 广东美的制冷设备有限公司 | Air conditioner anti-freeze protects control method and device |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021093310A1 (en) * | 2019-11-14 | 2021-05-20 | 青岛海尔空调器有限总公司 | Freezing-prevention protection method and apparatus for air conditioner, and air conditioner |
| CN111578415A (en) * | 2020-05-25 | 2020-08-25 | 广东美的制冷设备有限公司 | Radiation air conditioner and compressor protection control method and device |
| CN111578415B (en) * | 2020-05-25 | 2021-12-21 | 广东美的制冷设备有限公司 | Radiation air conditioner and compressor protection control method and device |
| CN112556095A (en) * | 2020-11-25 | 2021-03-26 | 郑州海尔空调器有限公司 | Method and device for preventing air conditioner evaporator from freezing and air conditioner |
| WO2023093048A1 (en) * | 2021-11-25 | 2023-06-01 | 青岛海尔空调器有限总公司 | Method and apparatus for protecting coil, and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110953689B (en) | 2021-08-24 |
| WO2021093310A1 (en) | 2021-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110953689B (en) | Air conditioner anti-freezing protection method and device and air conditioner | |
| CN109959127B (en) | Unit control method and device and air conditioner | |
| CN108444034B (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| CN112128944B (en) | Method and device for controlling humidity of air conditioner and air conditioner | |
| CN110736203B (en) | Control method and control device for defrosting of air conditioner and air conditioner | |
| CN109210699B (en) | Control method for anti-freezing protection of air conditioner | |
| CN114636225B (en) | Method and device for freezing protection of air conditioner, air conditioner and storage medium | |
| CN111706973A (en) | Control method and control device for dehumidification of air conditioner and air conditioner | |
| CN112066515B (en) | Control method for air conditioning system, air conditioning control system and air conditioning system | |
| CN110736234A (en) | Air conditioner control method and device and air conditioner | |
| CN108413564B (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| CN110469991B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN110736213B (en) | Control method and control device for defrosting of air conditioner and air conditioner | |
| CN113028574A (en) | Control method and control device for improving reliability of air conditioner and air conditioner | |
| CN114738949B (en) | Control method and device for mobile air conditioner and mobile air conditioner | |
| CN114061033B (en) | Method and device for defrosting air conditioner, air conditioner and storage medium | |
| CN108413565B (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| CN110470000B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN110470009B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN110470022B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN110470023B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN113251596A (en) | Control method and device for air conditioner and air conditioner | |
| CN110470008B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN112524760A (en) | Method and device for controlling air outlet temperature of air conditioner and air conditioner | |
| CN112556095A (en) | Method and device for preventing air conditioner evaporator from freezing and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |