CN108444034B - Anti-freezing control method for indoor unit of air conditioner and air conditioner - Google Patents
Anti-freezing control method for indoor unit of air conditioner and air conditioner Download PDFInfo
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- CN108444034B CN108444034B CN201810151968.2A CN201810151968A CN108444034B CN 108444034 B CN108444034 B CN 108444034B CN 201810151968 A CN201810151968 A CN 201810151968A CN 108444034 B CN108444034 B CN 108444034B
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- 238000007710 freezing Methods 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000008014 freezing Effects 0.000 claims abstract description 70
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 13
- 206010060904 Freezing phenomenon Diseases 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 1
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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
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F2110/00—Control inputs relating to air properties
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an anti-freezing control method for an indoor unit of an air conditioner and the air conditioner. The invention aims to solve the problems that the freezing condition of an indoor unit is difficult to accurately judge only according to the temperature of an inner coil pipe and a corresponding anti-freezing mode is not set according to the different freezing conditions of the indoor unit in the conventional air conditioner. The invention discloses an anti-freezing control method for an indoor unit, which comprises the following steps: when the air conditioner operates in a refrigerating mode, acquiring fan current and coil temperature of an indoor unit; selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil pipe; so that the air conditioner can judge the freezing condition of the indoor unit according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil pipe, and select the most suitable anti-freezing mode according to different freezing conditions, thereby effectively saving energy on the basis of enhancing the deicing effect.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an anti-freezing control method for an indoor unit of an air conditioner and the air conditioner.
Background
Along with the continuous improvement of living standard of people, people also put forward higher and higher requirements on living environment. In order to maintain a comfortable ambient temperature, an air conditioner has become an indispensable equipment in human life. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation loop for connecting the indoor unit and the outdoor unit, and a heat exchange medium in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation loop, so as to achieve an effect of changing a room temperature. Taking the air conditioner in refrigeration operation as an example, a coil pipe of the indoor unit is always in a low temperature state; at this moment, if the indoor environment has higher humidity, the coil pipe of the indoor unit is easy to freeze, and the generation of the freezing phenomenon can seriously affect the heat exchange efficiency of the indoor unit, so that the heat exchange effect of the air conditioner is continuously weakened, and the comfort level of the indoor environment is further affected. Therefore, when the air conditioner is in a cooling operation, the air conditioner needs to ensure that the coil of the indoor unit is not frozen.
In order to monitor the freezing phenomenon of the indoor unit coil, the conventional air conditioner usually installs a temperature sensor on the coil of the indoor unit, so that the air conditioner can judge the freezing condition of the indoor unit coil through the temperature of the coil of the indoor unit, and the air conditioner can timely perform deicing treatment when the freezing phenomenon of the coil of the indoor unit occurs. However, the monitoring method has a great disadvantage that the accuracy of the monitoring method needs to depend on the flow splitting condition of the heat exchanger; particularly, when the shunting condition of the heat exchanger of the indoor unit is not good, if the air conditioner only depends on one shunt branch provided with the temperature sensor, the freezing condition of the whole coil pipe of the indoor unit is difficult to accurately judge. Further, when the air conditioner has found that the indoor unit is frozen through the temperature sensor, the corresponding freezing prevention mode is not performed according to the difference of the freezing degree of the indoor unit. Therefore, the existing air conditioner can not accurately judge the freezing condition of the indoor unit, and a corresponding anti-freezing mode is not set according to the different freezing conditions of the indoor unit, so that the heat exchange efficiency of the air conditioner is easily seriously influenced by the freezing phenomenon of the indoor unit.
Accordingly, there is a need in the art for a new control method for preventing freezing of an indoor unit of an air conditioner and an air conditioner to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problems that the existing air conditioner is difficult to accurately determine the freezing condition of the indoor unit only according to the temperature of the inner coil, and a corresponding anti-freezing mode is not set according to the difference of the freezing conditions of the indoor unit, the present invention provides an anti-freezing control method for an indoor unit of an air conditioner, wherein the anti-freezing control method for the indoor unit comprises: when the air conditioner operates in a refrigerating mode, acquiring fan current and coil temperature of the indoor unit; and selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil.
In the above preferred technical solution of the control method for preventing freezing of an indoor unit of an air conditioner, "selectively enabling the air conditioner to enter a corresponding indoor unit freezing prevention mode according to a correspondence between a fan current of the indoor unit and a coil temperature" specifically includes: if the fan current of the indoor unit is smaller than a first preset current value and larger than a second preset current value, and the coil temperature of the indoor unit is smaller than a first preset temperature and larger than a second preset temperature, the air conditioner enters a first anti-freezing mode, wherein the first preset current value is larger than the second preset current value, and the first preset temperature is larger than the second preset temperature.
In the above preferred technical solution of the control method for preventing freezing of an indoor unit of an air conditioner, "selectively enabling the air conditioner to enter a corresponding indoor unit freezing prevention mode according to a correspondence between a fan current of the indoor unit and a coil temperature" specifically includes: and if the fan current of the indoor unit is less than or equal to a second preset current value and greater than a third preset current value and the coil temperature of the indoor unit is less than or equal to a second preset temperature and greater than a third preset temperature, enabling the air conditioner to enter a second anti-freezing mode, wherein the second preset current value is greater than the third preset current value, and the second preset temperature is greater than the third preset temperature.
In the above preferred technical solution of the control method for preventing freezing of an indoor unit of an air conditioner, "selectively enabling the air conditioner to enter a corresponding indoor unit freezing prevention mode according to a correspondence between a fan current of the indoor unit and a coil temperature" specifically includes: and if the current of the fan of the indoor unit is less than or equal to a third preset current value and the temperature of the coil of the indoor unit is less than or equal to the third preset temperature, enabling the air conditioner to enter a third freezing prevention mode.
In a preferred technical solution of the above-mentioned indoor unit anti-freezing control method for an air conditioner, the indoor unit anti-freezing control method further includes: and when the air conditioner operates in a refrigerating mode and the indoor unit is in an unfrozen state, measuring the first preset current value and the first preset temperature.
In a preferred technical solution of the above-mentioned indoor unit anti-freezing control method for an air conditioner, the indoor unit anti-freezing control method further includes: and when the air conditioner operates in a refrigerating mode and the indoor unit is in a slightly icing state, measuring the second preset current value and the second preset temperature.
In a preferred technical solution of the above-mentioned indoor unit anti-freezing control method for an air conditioner, the indoor unit anti-freezing control method further includes: and when the air conditioner operates in a refrigerating mode and the indoor unit is in a severe icing state, measuring the third preset current value and the third preset temperature.
In a preferred technical solution of the above-mentioned indoor unit anti-freezing control method for an air conditioner, the indoor unit anti-freezing control method further includes: and after the air conditioner enters an indoor unit anti-freezing mode, judging whether the air conditioner exits the indoor unit anti-freezing mode or not according to the fan current of the indoor unit and a first preset current value.
In the above preferred technical solution of the control method for preventing freezing of an indoor unit of an air conditioner, "determining whether to exit the air conditioner from a freezing prevention mode of the indoor unit according to a fan current of the indoor unit and the first preset current value" specifically includes: and if the fan current of the indoor unit is greater than or equal to the first preset current value, enabling the air conditioner to exit the anti-freezing mode of the indoor unit.
The invention also provides an air conditioner, which comprises a controller, wherein the controller is configured to be capable of executing the anti-freezing control method for the indoor unit of the air conditioner.
As can be understood by those skilled in the art, in a preferred embodiment of the present invention, the method for controlling the indoor unit to prevent freezing includes: when the air conditioner operates in a refrigerating mode, acquiring fan current and coil temperature of the indoor unit; and selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil. When the freezing degree of the indoor unit is judged only through the fan current of the indoor unit or only through the coil temperature of the indoor unit, the judgment is easy to be mistaken due to the influence of other irrelevant factors; therefore, the indoor unit anti-freezing control method provided by the invention judges the freezing degree of the indoor unit by introducing two judging conditions at the same time, namely the air conditioner can selectively enable the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current and the coil temperature of the indoor unit, so that the judging accuracy is effectively improved. The freezing degree of the indoor unit is judged according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil pipe, so that the optimal anti-freezing mode of the indoor unit is selected.
It will be understood that in a certain freezing range, the more severe the freezing of the indoor unit, the lower will necessarily be the temperature of the coil of the indoor unit. Further, the fan current of the indoor unit can be changed correspondingly with the change of the freezing degree of the indoor unit, and the change of the fan current is not easily interfered by irrelevant factors. The freezing degree of the indoor unit is judged by combining the fan current of the indoor unit and the coil temperature, so that the air conditioner can more accurately judge the freezing condition of the indoor unit more effectively, and the problem that the existing air conditioner is easily influenced by other irrelevant factors to cause misjudgment when the freezing condition of the indoor unit is judged only by the temperature of the inner coil is effectively solved.
Specifically, when the current attenuation degree of the fan of the indoor unit is low and the temperature of the coil of the indoor unit is high, it indicates that the indoor unit is in a slightly frozen state, and the air conditioner preferably enables the indoor unit to enter a first anti-freezing mode; when the current attenuation degree of a fan of the indoor unit is slightly high and the temperature of a coil of the indoor unit is slightly low, the indoor unit is in a moderate freezing state at the moment, and the air conditioner is suitable for enabling the indoor unit to enter a second anti-freezing mode; when the current attenuation degree of the fan of the indoor unit is high and the temperature of the coil of the indoor unit is low, the indoor unit is in a severe freezing state at the moment, and the air conditioner is suitable for enabling the indoor unit to enter a third freezing prevention mode. The invention effectively judges the freezing degree of the indoor unit by the judging mode, so that the air conditioner can accurately select the most suitable anti-freezing mode.
Furthermore, on the basis of the control method for the indoor unit to enter the anti-freezing mode, the invention also provides a control method for the indoor unit to exit the anti-freezing mode. In a preferred embodiment of the present invention, after the air conditioner enters an indoor unit anti-freezing mode, the indoor unit anti-freezing control method compares a fan current of the indoor unit with a first preset current value; if the fan current of the indoor unit is greater than or equal to the first preset current value, the freezing condition of the indoor unit is improved; at this time, the indoor unit is caused to exit the anti-freezing mode. That is to say, the invention judges the time when the indoor unit exits the anti-freezing mode by comparing the fan current of the indoor unit with the first preset current value, so as to effectively ensure that the freezing condition of the indoor unit is comprehensively improved when the indoor unit exits the anti-freezing mode; simultaneously, the air conditioner can also resume normal refrigeration mode fast after the deicing, and then effectively guarantee the refrigeration effect of air conditioner improves user experience.
Further, the present invention provides, in addition to the above-described technical solutions, an air conditioner including a controller configured to be able to execute the anti-freezing control method according to the above-described preferred technical solutions, thereby having technical effects of the above-described anti-freezing control method, and compared to existing air conditioners, the air conditioner according to the present invention is able to select an optimal anti-freezing mode according to a freezing degree of an indoor unit, make an anti-freezing operation of the air conditioner more intelligent and flexible, and prevent excessive waste of energy and poor deicing effects due to poor correspondence of the anti-freezing mode in which the air conditioner operates.
Drawings
FIG. 1 is a flow chart of the main steps of the control method for preventing the indoor unit from freezing according to the present invention;
fig. 2 is a flowchart illustrating specific steps of an indoor unit freezing prevention control method according to the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the steps of the method of the present invention are described herein in a particular order, these orders are not limiting, and one skilled in the art may perform the steps in a different order without departing from the underlying principles of the invention.
Based on the existing air conditioner proposed in the background art, the freezing condition of the indoor unit is judged only through the temperature of the inner coil, and the problem of misjudgment is easily caused. The invention provides an anti-freezing control method for an indoor unit of an air conditioner, and aims to solve the problem that the existing air conditioner judges the time for entering an anti-freezing mode only by a single factor and is easy to cause misjudgment due to the influence of other factors.
Referring to fig. 1, the method for controlling freezing prevention of an indoor unit according to the present invention is mainly illustrated in a flowchart. The air conditioner of the present invention includes an indoor unit, and as shown in fig. 1, the control method for preventing freezing of the indoor unit mainly includes the following steps:
s1: when the air conditioner operates in a refrigerating mode, acquiring fan current and coil temperature of an indoor unit;
s2: and selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil.
It will be understood by those skilled in the art that in a certain freezing range, the more severe the freezing condition of the indoor unit, the lower the temperature of the coil of the indoor unit will necessarily be. Meanwhile, the current of the fan of the indoor unit can reflect the freezing degree of the air conditioner, and the corresponding current of the fan is determined because the load of the fan is determined at a certain rotating speed. In other words, when the rotation speed of the fan is determined, if the wind resistance of the fan is larger, the freezing degree of the indoor unit is more serious, and the fan current of the indoor unit is also smaller; meanwhile, if the current of the fan is smaller, the larger the wind resistance of the fan is, that is, the more serious the freezing degree of the indoor unit is. Therefore, the freezing degree of the indoor unit can be effectively judged according to the corresponding relation between the coil temperature of the indoor unit and the fan current.
It should be noted that, in practical applications, the fan current and the coil temperature of the indoor unit under different freezing degrees may be respectively measured in an experimental manner before the air conditioner leaves the factory, that is, the air conditioner is enabled to perform cooling operation in an unfrozen state, and a first preset current value and a first preset temperature are respectively measured; enabling the air conditioner to perform refrigeration operation in a slightly frozen state, and respectively measuring a second preset current value and a second preset temperature; and enabling the air conditioner to perform cooling operation in a heavy freezing state, and respectively measuring a third preset current value and a third preset temperature. Of course, a person skilled in the art can flexibly set the freezing degree range of the air conditioner according to actual conditions, for example, the freezing degree range can be distinguished according to the freezing area of the inner coil, the air conditioner is set to be in an unfrozen state when the freezing phenomenon of the inner coil does not occur, the air conditioner is set to be in moderate freezing when the freezing area of the inner coil reaches 30%, and the air conditioner is set to be in severe freezing when the freezing area of the inner coil reaches 80%.
Further, on the basis of the setting mode, the fan current and the coil temperature of the indoor unit, which are respectively and correspondingly measured in each situation, are divided into sections, namely if the fan current of the indoor unit is greater than or equal to a first preset current value and the coil temperature of the indoor unit is greater than or equal to a first preset temperature, the indoor unit is in an unfrozen state, and the indoor unit does not need to enter an anti-freezing mode; if the fan current of the indoor unit is smaller than a first preset current value and larger than a second preset current value, and the coil temperature of the indoor unit is smaller than a first preset temperature and larger than a second preset temperature, the indoor unit is in a slightly frozen state; if the fan current of the indoor unit is smaller than a second preset current value and larger than a third preset current value, and the coil temperature of the indoor unit is smaller than a second preset temperature and larger than a third preset temperature, the indoor unit is in a moderate freezing state; and if the current of the fan of the indoor unit is less than a third preset current value and the temperature of the coil of the indoor unit is less than a third preset temperature, indicating that the indoor unit is in a heavy freezing state.
As will be appreciated by those skilled in the art, in the preferred embodiment of the present invention, the first preset current value is greater than the second preset current value, which is greater than the third preset current value; and the first preset temperature is greater than the second preset temperature, which is greater than the third preset temperature. Those skilled in the art can flexibly set specific values of the first preset current value, the first preset temperature, the second preset current value, the second preset temperature, the third preset current value and the third preset temperature in practical application, as long as the dividing point determined by the preset values can distinguish the freezing degree of the indoor unit, so that the air conditioner can select the most suitable anti-freezing mode of the indoor unit.
Referring to fig. 2, the method for controlling the indoor unit to prevent freezing according to the present invention is illustrated in a flowchart. As shown in fig. 2, the step of selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relationship between the fan current and the coil temperature of the indoor unit specifically includes: and if the current of the fan of the indoor unit is smaller than a first preset current value and larger than a second preset current value, and the temperature of the coil pipe of the indoor unit is smaller than a first preset temperature and larger than a second preset temperature, enabling the air conditioner to enter a first anti-freezing mode. Since the indoor unit is only in a slightly frozen state at this time, the air conditioner can rapidly improve the freezing condition of the indoor unit by increasing the opening degree of the electronic expansion valve by 50 steps; of course, the technician may set the first freeze prevention mode according to the actual conditions of different air conditioners.
Preferably, as shown in fig. 2, the step of selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to a corresponding relationship between a fan current of the indoor unit and a coil temperature includes: and if the fan current of the indoor unit is less than or equal to a second preset current value and greater than a third preset current value, and the coil temperature of the indoor unit is less than or equal to the second preset temperature and greater than the third preset temperature, enabling the air conditioner to enter a second anti-freezing mode. Because the indoor unit is in a moderate freezing state, the air conditioner needs to increase the opening of the electronic expansion valve by 50 steps and reduce the frequency of the compressor to 0.8 times of the current frequency to quickly improve the freezing condition of the indoor unit; of course, the technician may set the second freeze prevention mode according to the actual conditions of different air conditioners.
Preferably, as shown in fig. 2, the step of selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to a corresponding relationship between a fan current of the indoor unit and a coil temperature includes: and if the current of the fan of the indoor unit is less than or equal to a third preset current value and the temperature of the coil of the indoor unit is less than or equal to the third preset temperature, enabling the air conditioner to enter a third freezing prevention mode. The air conditioner can protect the indoor unit in an automatic shutdown mode because the indoor unit is in a heavy freezing state at the moment; of course, the technician may set the third freeze prevention mode according to the actual conditions of different air conditioners.
In a preferred embodiment of the method, after the air conditioner enters an indoor unit anti-freezing mode, the air conditioner compares a fan current of the indoor unit with a first preset current value; if the current of the fan of the indoor unit is greater than or equal to a first preset current value, the freezing condition of the indoor unit is improved; at this time, the indoor unit is caused to exit the anti-freezing mode.
Finally, it should be noted that the above examples are all preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. When the present invention is actually used, a part of the steps may be added or deleted as needed or the order between the different steps may be changed by those skilled in the art. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
So far, the preferred embodiments of the present invention have been described in conjunction with the accompanying drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (6)
1. An indoor unit anti-freezing control method for an air conditioner is characterized by comprising the following steps:
when the air conditioner operates in a refrigerating mode, acquiring fan current and coil temperature of the indoor unit;
selectively enabling the air conditioner to enter a corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current of the indoor unit and the temperature of the coil pipe;
the step of selectively enabling the air conditioner to enter the corresponding indoor unit anti-freezing mode according to the corresponding relation between the fan current and the coil temperature of the indoor unit specifically comprises the following steps:
if the current of the fan of the indoor unit is smaller than a first preset current value and larger than a second preset current value, and the temperature of the coil of the indoor unit is smaller than a first preset temperature and larger than a second preset temperature, increasing the opening of an electronic expansion valve of the air conditioner by 50 steps;
if the fan current of the indoor unit is less than or equal to the second preset current value and greater than a third preset current value, and the coil temperature of the indoor unit is less than or equal to the second preset temperature and greater than the third preset temperature, the opening of an electronic expansion valve of the air conditioner is increased by 50 steps, and the frequency of a compressor is reduced to 0.8 time of the current frequency;
if the fan current of the indoor unit is less than or equal to the third preset current value and the coil temperature of the indoor unit is less than or equal to the third preset temperature, stopping the air conditioner;
the first preset current value is greater than the second preset current value, the second preset current value is greater than the third preset current value, the first preset temperature is greater than the second preset temperature, and the second preset temperature is greater than the third preset temperature;
the control method for preventing the indoor unit from freezing further comprises the following steps:
and after the air conditioner enters an indoor unit anti-freezing mode, judging whether the air conditioner exits the indoor unit anti-freezing mode or not according to the fan current of the indoor unit and the first preset current value.
2. The indoor unit anti-freezing control method for the air conditioner as claimed in claim 1, wherein the indoor unit anti-freezing control method further comprises:
and when the air conditioner operates in a refrigerating mode and the indoor unit is in an unfrozen state, measuring the first preset current value and the first preset temperature.
3. The indoor unit anti-freezing control method for the air conditioner as claimed in claim 1, wherein the indoor unit anti-freezing control method further comprises:
and when the air conditioner operates in a refrigerating mode and the indoor unit is in a slightly icing state, measuring the second preset current value and the second preset temperature.
4. The indoor unit anti-freezing control method for the air conditioner as claimed in claim 1, wherein the indoor unit anti-freezing control method further comprises:
and when the air conditioner operates in a refrigerating mode and the indoor unit is in a severe icing state, measuring the third preset current value and the third preset temperature.
5. The indoor unit anti-freezing control method for the air conditioner according to claim 1, wherein the step of determining whether to cause the air conditioner to exit the indoor unit anti-freezing mode according to the fan current of the indoor unit and the first preset current value specifically comprises:
and if the fan current of the indoor unit is greater than or equal to the first preset current value, enabling the air conditioner to exit the anti-freezing mode of the indoor unit.
6. An air conditioner including a controller, characterized in that the controller is configured to be able to execute the indoor unit anti-freezing control method for an air conditioner of any one of claims 1 to 5.
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| CN201810151968.2A CN108444034B (en) | 2018-02-14 | 2018-02-14 | Anti-freezing control method for indoor unit of air conditioner and air conditioner |
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| CN201810151968.2A CN108444034B (en) | 2018-02-14 | 2018-02-14 | Anti-freezing control method for indoor unit of air conditioner and air conditioner |
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| CN111189187B (en) * | 2018-11-14 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189184B (en) * | 2018-11-14 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189185B (en) * | 2018-11-14 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189188B (en) * | 2018-11-14 | 2021-09-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189158B (en) * | 2018-11-14 | 2022-03-29 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189159B (en) * | 2018-11-14 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN111189165B (en) * | 2018-11-14 | 2022-04-15 | 青岛海尔空调器有限总公司 | Air conditioner and anti-freezing control method thereof |
| CN112762593B (en) * | 2021-01-06 | 2022-11-15 | 青岛海尔空调器有限总公司 | Control method and device for preventing freezing of air conditioner evaporator and cabinet air conditioner |
| CN114608145B (en) * | 2022-02-24 | 2024-02-20 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner, air conditioner and storage medium |
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| US7836707B2 (en) * | 2006-01-20 | 2010-11-23 | Carrier Corporation | Methods for detecting and responding to freezing coils in HVAC systems |
| CN201072272Y (en) * | 2007-06-07 | 2008-06-11 | 中国人民解放军总后勤部建筑工程研究所 | Heat pump defrosting control device of cooling and heating blower |
| CN101660808B (en) * | 2008-08-29 | 2012-01-04 | Tcl集团股份有限公司 | Air conditioner and frost removal control method thereof |
| CN104807132B (en) * | 2014-01-23 | 2018-02-27 | 珠海格力电器股份有限公司 | Defrosting control method and device |
| CN105980784B (en) * | 2014-03-28 | 2018-12-11 | 日立江森自控空调有限公司 | Air conditioner |
| CN104930674B (en) * | 2015-05-14 | 2017-11-17 | 珠海格力电器股份有限公司 | Defrosting control method and device for outdoor unit of air conditioning unit and air conditioning system |
| CN105627524B (en) * | 2016-03-14 | 2018-06-01 | 广东美的制冷设备有限公司 | Air conditioner anti-freeze control method and air conditioner |
| CN106288144A (en) * | 2016-07-26 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner and Defrost method thereof |
| CN107084507A (en) * | 2017-06-05 | 2017-08-22 | 广东美的暖通设备有限公司 | Defrost determination methods, defrost judge system and air-conditioning |
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2018
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