CN108507130B - Self-cleaning control method for air conditioner - Google Patents
Self-cleaning control method for air conditioner Download PDFInfo
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- CN108507130B CN108507130B CN201810152157.4A CN201810152157A CN108507130B CN 108507130 B CN108507130 B CN 108507130B CN 201810152157 A CN201810152157 A CN 201810152157A CN 108507130 B CN108507130 B CN 108507130B
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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
- F24F11/62—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/62—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
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Abstract
The invention belongs to the technical field of air conditioners and aims to solve the problem that the existing air conditioner is easy to frequently execute a self-cleaning mode due to misjudgment by judging the single condition of the current of an indoor unit fan. To this end, the present invention provides a self-cleaning control method for an air conditioner including an indoor unit, the self-cleaning control method including: when the air conditioner operates in a refrigerating mode, acquiring fan current of an indoor unit, coil temperature of the indoor unit and dew point temperature of air; comparing the coil temperature of the indoor unit with the dew point temperature of air, and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to the comparison result and the fan current of the indoor unit. The invention enables the air conditioner to execute the self-cleaning mode under a reasonable condition no matter the indoor unit of the air conditioner generates condensation or does not generate condensation, and can avoid the condition that the air conditioner wastes energy.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method for an air conditioner.
Background
The air conditioner is a device capable of refrigerating/heating the indoor, and as time goes on, the dust deposition on the indoor unit and the outdoor unit of the air conditioner increases gradually, and after the dust deposition accumulates to a certain degree, a large amount of bacteria can be bred, and especially when the indoor air flows through the indoor unit, a large amount of dust and bacteria can be carried, so that the air conditioner needs to be cleaned in time.
In the prior art, the cleaning mode of the air conditioner comprises manual cleaning and self-cleaning of the air conditioner, time and labor are wasted by adopting the manual cleaning, all parts of the air conditioner need to be disassembled and cleaned, and all the parts need to be reassembled after the cleaning is finished. Therefore, many air conditioners have adopted a self-cleaning mode, for example, patent publication No. CN107525209A discloses a self-cleaning control method for an air conditioner, which specifically includes detecting a current operation mode of the air conditioner, and if the current operation mode of the air conditioner is a non-cooling mode, adjusting the air conditioner to a cooling mode; detecting the rotating speed of a motor of an indoor unit fan of the air conditioner and a first current value of the motor under the rotating speed; and comparing the first current value of the motor at the rotating speed with a first preset current value at the rotating speed, and if the first current value is less than or equal to the first preset current value, starting a self-cleaning mode of the air conditioner and executing self-cleaning treatment of the heat exchanger of the indoor unit. That is, the above patent uses the fan current of the indoor unit to determine whether to perform self-cleaning of the indoor unit, however, in the process of cooling operation of the air conditioner, condensation may occur in the indoor unit of the air conditioner, and the fan current of the indoor unit may be affected after condensation occurs in the indoor unit, that is, the fan current of the indoor unit may be reduced due to condensation of the air conditioner or dust deposition of the air conditioner if it cannot be determined by only a single condition of the fan current of the indoor unit that the current of the indoor unit is reduced to the end, and if the fan current of the indoor unit is reduced due to condensation of the indoor unit, the air conditioner may still perform self-cleaning on the indoor unit without dust deposition of the indoor unit, which may cause waste of energy. Therefore, the air conditioner is easy to frequently execute the self-cleaning mode due to misjudgment by judging the single condition of the fan current of the indoor unit of the air conditioner.
Therefore, there is a need in the art for a new self-cleaning control method for an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the conventional air conditioner is easy to frequently execute a self-cleaning mode due to misjudgment by judging a single condition of a fan current of an indoor unit, the present invention provides a self-cleaning control method for an air conditioner, the air conditioner comprises an indoor unit, the self-cleaning control method comprises: when the air conditioner operates in a refrigerating mode, acquiring fan current of an indoor unit, coil temperature of the indoor unit and dew point temperature of air; comparing the coil temperature of the indoor unit with the dew point temperature of air, and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to the comparison result and the fan current of the indoor unit.
In the preferred technical solution of the self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result and the fan current of the indoor unit includes: if the coil temperature of the indoor unit is less than the dew point temperature of air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than a preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a first preset value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to a comparison result of the ratio and the first preset value.
In the preferred technical solution of the above self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result between the ratio and the first preset value includes: and if the ratio is smaller than the first preset value, executing a self-cleaning mode on the indoor unit.
In the preferred technical solution of the above self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result between the ratio and the first preset value further includes: and if the ratio is not less than the first preset value, the self-cleaning mode is not executed on the indoor unit.
In the preferred technical solution of the self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result and the fan current of the indoor unit includes: if the coil temperature of the indoor unit is greater than or equal to the dew point temperature of the air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than a preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a second preset value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to a comparison result of the ratio and a second preset value.
In the preferred technical solution of the above self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result between the ratio and the second preset value includes: and if the ratio is smaller than a second preset value, executing a self-cleaning mode on the indoor unit.
In the preferred technical solution of the above self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result between the ratio and the second preset value further includes: and if the ratio is not less than the second preset value, the self-cleaning mode is not executed on the indoor unit.
In the preferred technical solution of the self-cleaning control method, the step of determining whether to execute the self-cleaning mode on the indoor unit according to the comparison result and the fan current of the indoor unit includes: and if the difference value between the coil temperature of the indoor unit and the standard coil temperature is less than or equal to the preset temperature value, not executing the self-cleaning mode on the indoor unit.
In a preferred technical solution of the above self-cleaning control method, the self-cleaning control method further includes: and if the execution times of the steps of comparing the coil temperature of the indoor unit with the dew point temperature of the air and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value reach preset times, executing a self-cleaning mode on the indoor unit.
In a preferred technical solution of the above self-cleaning control method, the self-cleaning control method further includes: and if the running time of the air conditioner reaches the preset time, executing a self-cleaning mode on the indoor unit.
The technical scheme includes that when the air conditioner is in refrigeration operation, whether condensation is generated in the indoor unit or not and whether the temperature of a coil of the indoor unit is too high or not are judged, if condensation is generated in the indoor unit and the temperature of the coil of the indoor unit is too high, the ratio of the current of a fan of the indoor unit to a standard current value is compared with a first preset value, and whether a self-cleaning mode is executed on the indoor unit or not is judged according to a comparison result; and if the indoor unit does not generate condensation and the temperature of the coil pipe of the indoor unit is overhigh, comparing the ratio of the current of the fan of the indoor unit to the standard current value with a second preset value, and judging whether to execute a self-cleaning mode on the indoor unit or not according to the comparison result. In practical application, because the fan current of the indoor unit is reduced due to the generation of the condensation, the first preset value is set to be lower than the second preset value, so that when the indoor unit of the air conditioner generates the condensation, the ratio of the fan current of the indoor unit to the standard current value can be compared with the slightly lower preset value. Through the arrangement, no matter the air conditioner generates condensation or does not generate condensation, the air conditioner can execute the self-cleaning mode under a reasonable condition, namely, the condition that the air conditioner frequently executes the self-cleaning mode to waste energy due to the fact that the air conditioner is judged to be ash-deposited due to condensation of the indoor unit by mistake through introducing judgment conditions of the coil temperature of the indoor unit of the air conditioner and the dew point temperature of air can be avoided.
Further, on the basis of the control mode, the invention also provides another control mode, namely when the execution times of the step of comparing the coil temperature of the indoor unit with the dew point temperature of air and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with the preset temperature value reach the preset times, the air conditioner automatically executes a self-cleaning mode, thereby cleaning the indoor unit. By the control mode, when the fan current of the indoor unit is detected to be in fault (namely the fan current of the indoor unit cannot be acquired), the time for entering the self-cleaning mode can still be judged by calculating the execution times of the steps of comparing the coil temperature of the indoor unit with the dew point temperature of air and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with the preset temperature value, so that the air conditioner can execute the self-cleaning mode according to the second control mode, and the situation that the self-cleaning mode is not executed all the time because the air conditioner cannot execute the self-cleaning mode through the first control mode is avoided.
Furthermore, on the basis of the two control modes, the invention further provides a control mode for judging whether to execute the self-cleaning mode or not by judging whether the running time of the air conditioner reaches the preset time or not, and by the control mode, when the coil temperature sensor of the indoor unit for detecting the coil temperature of the indoor unit and the air dew point temperature sensor for detecting the dew point temperature of air are failed/damaged and the fan current of the indoor unit is also detected to be failed, the time for entering the self-cleaning mode can still be judged by the running time of the air conditioner, so that the situation that the self-cleaning mode is not executed all the time because the air conditioner cannot execute the self-cleaning mode by the first and second control modes is avoided.
Drawings
FIG. 1 is a flow chart of a self-cleaning control method of the present invention;
fig. 2 is a flow chart of an embodiment of the self-cleaning control method of 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 present invention has been described with reference to an indoor unit of an air conditioner, since the indoor unit and the outdoor unit of the air conditioner have a symmetrical structure, the principle of the present invention is also applicable to the self-cleaning of the outdoor unit during the heating operation of the air conditioner, and at this time, the fan current of the indoor unit is replaced by the fan current of the outdoor unit and the coil temperature of the indoor unit is replaced by the coil temperature of the outdoor unit.
The problem that the existing air conditioner frequently executes the self-cleaning mode due to misjudgment is easily caused by judging the single condition of the current of the fan of the indoor unit based on the background technology. The invention provides a self-cleaning control method for an air conditioner, aiming at enabling the air conditioner to execute a self-cleaning mode under a reasonable condition, thereby avoiding the situation that the air conditioner is judged to be ash-deposited due to condensation of an indoor unit and the energy is wasted due to frequent execution of the self-cleaning mode.
Specifically, the air conditioner of the present invention includes an indoor unit, and as shown in fig. 1, the self-cleaning control method of the present invention includes: when the air conditioner operates in a refrigerating mode, acquiring fan current of an indoor unit, coil temperature of the indoor unit and dew point temperature of air; comparing the coil temperature of the indoor unit with the dew point temperature of air, and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to the comparison result and the fan current of the indoor unit. The coil temperature of the indoor unit can be acquired through the coil temperature sensor of the indoor unit, and the dew point temperature of air is acquired through the air dew point temperature sensor. In addition, the preset temperature value may be 2 ℃, which is not limited, and a person skilled in the art may flexibly set a specific value of the preset temperature value in practical application, and only the boundary point determined by the preset temperature value may be used to determine whether the temperature of the coil pipe of the indoor unit is too high. It should be noted that the current of the fan of the indoor unit can directly reflect the dust deposition degree of the air conditioner, because the load of the fan is determined at a certain rotation speed, when the load of the fan is increased at the same rotation speed, and accordingly, the current of the fan is decreased, it is indicated that the wind resistance of the fan is increased, that is, the dust deposition on the indoor unit is performed, and the more serious the dust deposition is, the smaller the current of the fan is, so the dust deposition degree of the indoor unit of the air conditioner can be fully determined according to the current of the fan.
Preferably, as shown in fig. 2, the step of determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result and the fan current of the indoor unit includes: if the coil temperature of the indoor unit is less than the dew point temperature of air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than a preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a first preset value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to a comparison result of the ratio and the first preset value. The step of judging whether to execute the self-cleaning mode on the indoor unit according to the comparison result of the ratio and the first preset value comprises the following steps: if the ratio is smaller than a first preset value, a self-cleaning mode is executed on the indoor unit; and if the ratio is not less than the first preset value, the self-cleaning mode is not executed on the indoor unit. It should be noted that, in the technical description of the present invention, "the self-cleaning mode is not performed" may be understood as not immediately performing the self-cleaning mode, i.e., performing the self-cleaning mode with a delay. In such a way, whether condensation is generated in the indoor unit of the air conditioner is judged by comparing the coil temperature of the indoor unit with the dew point temperature of air, when the coil temperature of the indoor unit is lower than the dew point temperature of the air, water vapor in the air can be pre-cooled on the indoor unit to generate condensation, and due to the generation of the condensation, the fan current of the indoor unit of the air conditioner can be reduced to a certain extent, so that the specific value of the first preset value can be set to be lower, for example, the first preset value is set to be 0.8, namely, when the ratio of the fan current of the indoor unit to the standard current value is lower than 0.8, the air conditioner can execute the self-cleaning mode on the indoor unit. Certainly, the first preset value may also be other values, and a person skilled in the art may flexibly set a specific value of the first preset value in practical application, as long as the demarcation point determined by the first preset value can determine whether the indoor unit is dusted or not under the condition that the indoor unit generates condensation.
Preferably, as shown in fig. 2, the step of determining whether to perform the self-cleaning mode on the indoor unit according to the comparison result and the fan current of the indoor unit includes: if the coil temperature of the indoor unit is greater than or equal to the dew point temperature of the air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than a preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a second preset value; and judging whether to execute a self-cleaning mode on the indoor unit or not according to a comparison result of the ratio and a second preset value. The step of judging whether to execute the self-cleaning mode on the indoor unit according to the comparison result of the ratio and the second preset value comprises the following steps: if the ratio is smaller than a second preset value, executing a self-cleaning mode on the indoor unit; and if the ratio is not less than the second preset value, the self-cleaning mode is not executed on the indoor unit. In such a way, whether condensation occurs in the indoor unit of the air conditioner is judged by comparing the coil temperature of the indoor unit with the dew point temperature of air, when the coil temperature of the indoor unit is not less than the dew point temperature of the air, condensation does not occur on the indoor unit of the air conditioner, and the fan current of the indoor unit is not affected by the condensation, so that the specific value of the second preset value can be set to be slightly higher, for example, the second preset value is set to be 0.9, namely, when the ratio of the fan current of the indoor unit to the standard current value is lower than 0.9, the air conditioner can execute the self-cleaning mode on the indoor unit. Certainly, the second preset value may also be other values, and a person skilled in the art may flexibly set a specific value of the second preset value in practical application, as long as the demarcation point determined by the second preset value can determine whether the indoor unit is dusted or not under the condition that the indoor unit does not generate condensation. In addition, in order to consider the influence of condensation on the fan current of the indoor unit when the indoor unit generates condensation, the first preset value should be always set lower than the second preset value.
In the embodiment of the invention, the temperature and the standard current value of the standard coil can be measured before the air conditioner leaves a factory, namely, the air conditioner is in a completely clean state, so that the air conditioner operates under a standard working condition, and the temperature and the standard current value of the standard coil corresponding to the fan of the indoor unit at different rotating speeds are measured in the process of operating the air conditioner under the standard working condition.
Preferably, the self-cleaning control method of the present invention further comprises: and if the execution times of the steps of comparing the coil temperature of the indoor unit with the dew point temperature of the air and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value reach preset times, executing a self-cleaning mode on the indoor unit. The preset times can be set by a person skilled in the art through an experimental manner, or can be set through an empirical manner, as long as the air conditioner can execute the self-cleaning mode through the demarcation point determined by the preset times. For example, the preset number of times may be 5, that is, when the number of times of performing the step of comparing the coil temperature of the indoor unit with the dew point temperature of the air and comparing the difference between the coil temperature of the indoor unit and the standard coil temperature with the preset temperature value reaches 5, the air conditioner immediately and automatically performs the self-cleaning mode.
Preferably, the self-cleaning control method of the present invention further comprises: and if the running time of the air conditioner reaches the preset time, executing a self-cleaning mode on the indoor unit. The skilled person can set the preset time through an experimental manner, or can set the preset time through an empirical manner, as long as the air conditioner can execute the self-cleaning mode through the demarcation point determined by the preset time. For example, the preset time may be 10h (hours), that is, when the operation time of the air conditioner reaches 10h, the air conditioner automatically performs the self-cleaning mode immediately.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously 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 (4)
1. A self-cleaning control method for an air conditioner including an indoor unit, the self-cleaning control method comprising:
when the air conditioner operates in a refrigerating mode, acquiring fan current of the indoor unit, coil temperature of the indoor unit and dew point temperature of air;
comparing the coil temperature of the indoor unit with the dew point temperature of the air, and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value;
if the coil temperature of the indoor unit is less than the dew point temperature of the air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than the preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a first preset value;
if the ratio is smaller than the first preset value, a self-cleaning mode is executed on the indoor unit;
if the ratio is not less than the first preset value, the self-cleaning mode is not executed on the indoor unit;
if the coil temperature of the indoor unit is greater than or equal to the dew point temperature of the air and the difference value between the coil temperature of the indoor unit and the standard coil temperature is greater than the preset temperature value, comparing the ratio of the fan current of the indoor unit to the standard current value with a second preset value;
if the ratio is smaller than the second preset value, a self-cleaning mode is executed on the indoor unit;
if the ratio is not less than the second preset value, the self-cleaning mode is not executed on the indoor unit;
wherein the first preset value is lower than the second preset value.
2. The self-cleaning control method of claim 1,
and if the difference value between the coil temperature of the indoor unit and the standard coil temperature is less than or equal to the preset temperature value, not executing a self-cleaning mode on the indoor unit.
3. The self-cleaning control method according to claim 1, further comprising:
and if the execution times of the steps of comparing the coil temperature of the indoor unit with the dew point temperature of the air and comparing the difference value between the coil temperature of the indoor unit and the standard coil temperature with a preset temperature value reach preset times, executing a self-cleaning mode on the indoor unit.
4. The self-cleaning control method according to any one of claims 1 to 3, characterized by further comprising:
and if the running time of the air conditioner reaches the preset time, executing a self-cleaning mode on the indoor unit.
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| CN109405178A (en) * | 2018-10-09 | 2019-03-01 | 青岛海尔空调器有限总公司 | Air conditioner and its control method |
| CN109916049B (en) * | 2019-03-21 | 2020-12-25 | 青岛海尔空调器有限总公司 | Self-cleaning control method for air conditioner |
| CN110469941B (en) * | 2019-07-17 | 2021-09-21 | 青岛海尔空调器有限总公司 | Self-cleaning control method for air conditioner |
| CN114838451B (en) * | 2022-05-23 | 2024-02-02 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and air conditioner |
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| CN106382709A (en) * | 2016-08-26 | 2017-02-08 | 珠海格力电器股份有限公司 | Method and system for detecting filth blockage of filter screen of air conditioner and air conditioner |
| CN106545953A (en) * | 2016-09-20 | 2017-03-29 | 珠海格力电器股份有限公司 | A kind of state of air-conditioning determines method, device and air-conditioning |
| CN107525209A (en) * | 2017-07-13 | 2017-12-29 | 青岛海尔空调器有限总公司 | Air conditioner automatically cleaning control method and device |
| CN107192102A (en) * | 2017-07-21 | 2017-09-22 | 广东美的暖通设备有限公司 | New blower fan and its automatically cleaning control method and device |
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