CN108375171B - Self-cleaning control method for air conditioner - Google Patents
Self-cleaning control method for air conditioner Download PDFInfo
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- CN108375171B CN108375171B CN201810096007.6A CN201810096007A CN108375171B CN 108375171 B CN108375171 B CN 108375171B CN 201810096007 A CN201810096007 A CN 201810096007A CN 108375171 B CN108375171 B CN 108375171B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 107
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 238000005057 refrigeration Methods 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 17
- 239000000428 dust Substances 0.000 description 17
- 239000012535 impurity Substances 0.000 description 14
- 230000007613 environmental effect Effects 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 7
- 238000007791 dehumidification Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000013475 authorization Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- 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
- F24F11/67—Switching between heating and cooling modes
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/90—Cleaning of purification apparatus
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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
-
- 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
- F24F2110/20—Humidity
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- 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
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Fluid Mechanics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a self-cleaning control method of an air conditioner, wherein the air conditioner comprises a self-cleaning mechanism for cleaning a filter screen, and the method comprises the following steps: after the air conditioner enters a self-cleaning mode, controlling the air conditioner to run in a heating mode; when the air conditioner is controlled to operate in the heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen; the first setting condition includes: the current environment humidity is not greater than the set environment humidity and/or the operation time of the heating mode reaches the set heating operation time; the set heating operation time is determined according to the ambient humidity when the heating mode is entered. The invention can improve the cleaning degree of the self-cleaning of the filter screen of the air conditioner.
Description
Technical Field
The invention belongs to the technical field of air conditioning, and particularly relates to control of an air conditioner, in particular to a self-cleaning control method of the air conditioner.
Background
The air inlet of the existing air conditioner is provided with a filter screen which is used for filtering air entering an indoor unit and preventing impurities such as dust from entering the indoor unit. After long-time use, impurities such as dust are easy to adhere to the filter screen, and air inlet meshes of the filter screen are blocked. If the air cannot be cleaned in time, the air quantity entering the indoor heat exchanger is reduced, the refrigerating/heating effect of the air conditioner is influenced, the energy consumption of the air conditioner is increased, and the service life of the air conditioner is shortened.
In order to clean the filter screen conveniently, a filter screen self-cleaning structure is arranged in the existing air conditioner, and the filter screen is cleaned under the condition that the filter screen is not detached. When the self-cleaning structure is used for cleaning the filter screen, the filter screen is not easy to sweep due to overlarge humidity, dust and the like attached to the filter screen and nearby structural members, and the cleaning effect is influenced. The cleaning of the filter screen is not thorough, and the problems of reduction of heat exchange air quantity, increase of energy consumption and the like still exist.
Disclosure of Invention
The invention aims to provide a self-cleaning control method of an air conditioner, which improves the cleaning degree of self-cleaning of a filter screen of the air conditioner.
In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:
a self-cleaning control method for an air conditioner, wherein the air conditioner comprises a self-cleaning mechanism for cleaning a filter screen, and the method comprises the following steps:
after the air conditioner enters a self-cleaning mode, controlling the air conditioner to run in a heating mode;
when the air conditioner is controlled to operate in the heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen;
the first setting condition includes: the current environment humidity is not greater than the set environment humidity and/or the operation time of the heating mode reaches the set heating operation time; the set heating operation time is determined according to the ambient humidity when the heating mode is entered.
In the heating mode, the control method determines the target frequency of the compressor according to the set target coil temperature, and controls the compressor according to the target frequency of the compressor.
The control method determines the target frequency of the compressor according to the set target coil temperature, and specifically includes:
the method comprises the steps of obtaining the real-time coil temperature of an indoor unit, calculating the difference value between the real-time coil temperature and the set target coil temperature, executing PID operation based on the difference value, and determining the target frequency of the compressor.
Preferably, the first set condition further includes that in the heating mode, a maintaining time for which the indoor coil temperature is stabilized at the set target coil temperature reaches a set maintaining time; the set maintaining time is determined according to the ambient humidity when the heating mode is entered.
In the heating mode, the wind speed of the indoor fan is controlled to be less than the set wind speed.
According to the control method, after the air conditioner enters the self-cleaning mode, the air conditioner is controlled to operate in the heating mode, and the control method specifically comprises the following steps:
after the air conditioner enters a self-cleaning mode, acquiring the current indoor environment temperature, and comparing the current indoor environment temperature with a set temperature;
if the current indoor environment temperature is not higher than the set temperature, controlling the air conditioner to directly run the heating mode; and if the current indoor environment temperature is higher than the set temperature, controlling the air conditioner to firstly operate the refrigeration mode and then operate the heating mode.
According to the control method, the controlling the air conditioner to operate in the cooling mode first and then in the heating mode specifically comprises the following steps:
controlling the air conditioner to operate in a refrigeration mode, and controlling the air conditioner to operate in a heating mode after a second set condition is met;
the second setting condition includes: the current indoor environment temperature is not more than the set temperature or the running time of the refrigeration mode reaches the set refrigeration running time; the set refrigerating operation time is determined according to the indoor environment temperature when the refrigerator enters the refrigerating mode.
The control method as described above, in the cooling mode, controlling the compressor to operate at a frequency not lower than a first set frequency; after the second set condition is met, firstly controlling the compressor to reduce the frequency to a second set frequency, and then controlling the air conditioner to operate the heating mode; the second set frequency is less than the first set frequency.
The control method as described above, the method further comprising:
and controlling the air conditioner to enter the self-cleaning mode after the self-cleaning condition is met.
Preferably, the self-cleaning condition includes receiving a self-cleaning control command and/or reaching a set accumulated operation time since the last self-cleaning.
Compared with the prior art, the invention has the advantages and positive effects that: the air conditioner self-cleaning control method provided by the invention is characterized in that after entering a self-cleaning mode, the air conditioner is firstly controlled to operate a heating mode, and after a certain condition is met, a self-cleaning mechanism is started to clean a filter screen; by controlling the air conditioner to operate in a heating mode, the temperature near a heat exchanger of the indoor unit, particularly around the filter screen can be increased, and the humidity around the filter screen is further reduced; the humidity around the filter screen is reduced, and the adhesive force of impurities such as dust on the filter screen can be reduced; then when the self-cleaning mechanism is started to clean the filter screen, impurities such as dust and the like can be smoothly removed from the filter screen, so that the cleaning degree of the self-cleaning of the filter screen is improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a flow chart of an embodiment of an air conditioner self-cleaning control method according to the present invention;
fig. 2 is a flowchart of another embodiment of an air conditioner self-cleaning control method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1, a flow chart of an embodiment of an air conditioner self-cleaning control method according to the present invention is shown. In this embodiment, the air conditioner includes a self-cleaning mechanism for cleaning the filter screen, and the self-cleaning mechanism may be any possible structure capable of automatically cleaning the filter screen in the air conditioner of the prior art. The method for realizing self-cleaning by using the self-cleaning mechanism comprises the following steps:
step 11: and after the air conditioner enters the self-cleaning mode, controlling the air conditioner to run in a heating mode.
The air conditioners with the self-cleaning mechanisms are all provided with a self-cleaning mode, and the self-cleaning mechanisms act in the self-cleaning mode to clean dust on the filter screen. In the prior art, after entering the self-cleaning mode, the compressor stops running, the air conditioner stops cooling/heating, and the self-cleaning mechanism is immediately started to act. In this embodiment, after the air conditioner enters the self-cleaning mode, the self-cleaning mechanism is not started immediately, but the air conditioner is controlled to operate in the heating mode.
Specifically, the air conditioner may enter the self-cleaning mode after the self-cleaning condition is satisfied. That is, the self-cleaning mode is operated to satisfy a condition for preventing the improper execution of the self-cleaning from affecting the performance of the air conditioner for adjusting the indoor temperature and the consumption of energy consumption. Preferably, the self-cleaning condition may be that a self-cleaning control command is received, or that the accumulated operation time of the air conditioner reaches a set accumulated operation time since the last self-cleaning; of course, the two conditions may be included at the same time, that is, the self-cleaning control command is received, and the accumulated operation time of the air conditioner reaches the set accumulated operation time since the last self-cleaning.
For the heating mode process, the heating mode in the prior art can be adopted for operation. In the heating mode, a target frequency of the compressor is determined according to a set target coil temperature, and the compressor is controlled according to the target frequency of the compressor. Specifically, the real-time coil temperature of the indoor unit is obtained, the difference value between the real-time coil temperature and the set target coil temperature is calculated, PID operation is executed based on the difference value, and the target frequency of the compressor is determined. The method of performing the PID operation based on the difference value is prior art and will not be described in detail herein. The real-time coil temperature is detected in real time by using an indoor unit coil temperature sensor according to a set sampling frequency, and a target coil temperature is set to be a preset target temperature. The determination of the set target coil temperature follows the principle that the temperature is reduced as much as possible on the basis of locally heating and dehumidifying the part near the indoor heat exchanger, particularly around the filter screen to the required humidity, so that the phenomenon that the comfort is influenced by the temperature rise of the indoor environment caused by the temperature rise is avoided, and meanwhile, the energy consumption of the air conditioner in operation is reduced as much as possible. Preferably, the target coil temperature is set to 48 ℃.
In other preferred embodiments, in the heating mode, the wind speed of the indoor fan is also controlled to be less than the set wind speed. Wherein the set wind speed is also a preset value and can be modified by authorization. For example, the set wind speed is a wind speed corresponding to a breeze, the wind speed of the indoor fan is controlled to be smaller than the set wind speed, and the wind speed of the indoor fan can be controlled to be a mute wind speed smaller than the wind speed corresponding to the breeze. The wind speed to indoor fan is injectd, can not too big, and the purpose is to avoid too big wind speed to blow into the indoor high temperature rise that leads to and influence the travelling comfort with high temperature wind, can also avoid too big wind speed to be unfavorable for local temperature rise around the filter screen and influence dehumidification effect simultaneously.
Step 12: when the air conditioner is controlled to operate in a heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen.
Wherein the first setting condition includes: the current ambient humidity is not greater than the set ambient humidity and/or the operation time of the heating mode reaches the set heating operation time. And the set heating operation time is determined according to the ambient humidity at the time of entering the heating mode. The current environment humidity refers to the indoor environment humidity of the indoor unit obtained by adopting a humidity sensor according to a set sampling frequency. The set environmental humidity is a preset humidity value, preferably, when the environmental humidity is not more than the set environmental humidity, the adhesive force of dust on the filter screen is small, and impurities such as the dust are easily cleaned from the filter screen.
There may be a certain difference between the current ambient humidity and the humidity around the filter screen, and therefore, as a more preferred embodiment, the first setting condition is that the operation time of the heating mode reaches the set heating operation time, and the set heating operation time is determined according to the ambient humidity when the heating mode is entered. Moreover, the larger the ambient humidity is, the longer the heating operation time is set to ensure sufficient dehumidification of the periphery of the filter screen. In addition, the first setting condition may be that, in the heating mode, a maintaining time during which the indoor coil temperature is stabilized at the set target coil temperature reaches the set maintaining time. The set holding time is also determined based on the ambient humidity at the time of entering the heating mode. The larger the ambient humidity is, the longer the set holding time is to ensure sufficient dehumidification around the filter screen. For example, the ambient humidity when entering the heating mode is less than 40% (relative humidity), and the set holding time is 2 min; when the heating mode is entered, the environmental humidity is less than 60 percent and not less than 40 percent, and the setting maintaining time is 3 min; when the heating mode is entered, the environmental humidity is less than 80% and not less than 60%, and the setting maintaining time is 5 min; the environmental humidity when entering the heating mode is more than 80%, and the set maintaining time is 7 min.
When the air conditioner is controlled to operate in the heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen. At this moment, through the operation of the heating mode and the judgment of the first set condition, the adhesion force of impurities such as dust on the filter screen can be reduced by the humidity around the filter screen, and the impurities can be easily swept down by the self-cleaning mechanism, so that the self-cleaning cleanliness of the filter screen is improved.
By adopting the self-cleaning control method, after entering the self-cleaning mode, the air conditioner is firstly controlled to operate in the heating mode, and the self-cleaning mechanism is started to clean the filter screen after certain conditions are met; by controlling the air conditioner to operate in a heating mode, the temperature near a heat exchanger of the indoor unit, particularly around the filter screen can be increased, and the humidity around the filter screen is further reduced; the humidity around the filter screen is reduced, and the adhesive force of impurities such as dust on the filter screen can be reduced; then when the self-cleaning mechanism is started to clean the filter screen, impurities such as dust and the like can be smoothly removed from the filter screen, so that the cleaning degree of the self-cleaning of the filter screen is improved.
Referring to fig. 2, there is shown a flowchart of another embodiment of an air conditioner self-cleaning control method according to the present invention. In this embodiment, the air conditioner includes a self-cleaning mechanism for cleaning the filter screen, and the self-cleaning mechanism may be any possible structure capable of automatically cleaning the filter screen in the air conditioner of the prior art. The method for realizing self-cleaning by using the self-cleaning mechanism comprises the following steps:
step 21: after the air conditioner enters a self-cleaning mode, the current indoor environment temperature is obtained and compared with the set temperature.
The air conditioners with the self-cleaning mechanisms are all provided with a self-cleaning mode, and the self-cleaning mechanisms act in the self-cleaning mode to clean dust on the filter screen. In the prior art, after entering the self-cleaning mode, the compressor stops running, the air conditioner stops cooling/heating, and the self-cleaning mechanism is immediately started to act. In this embodiment, after the air conditioner enters the self-cleaning mode, the self-cleaning mechanism is not immediately started, but the current indoor environment temperature is obtained first and compared with the set temperature. The current indoor environment temperature is a real-time indoor environment temperature obtained by adopting a temperature sensor according to a set sampling frequency; the set temperature is a preset temperature, is a temperature reflecting the indoor temperature, and can be modified by authorization. For example, the set temperature is 27 ℃.
Specifically, the air conditioner may enter the self-cleaning mode after the self-cleaning condition is satisfied. That is, the self-cleaning mode is operated to satisfy a condition for preventing the improper execution of the self-cleaning from affecting the performance of the air conditioner for adjusting the indoor temperature and the consumption of energy consumption. Preferably, the self-cleaning condition may be that a self-cleaning control command is received, or that the accumulated operation time of the air conditioner reaches a set accumulated operation time since the last self-cleaning; of course, the two conditions may be included at the same time, that is, the self-cleaning control command is received, and the accumulated operation time of the air conditioner reaches the set accumulated operation time since the last self-cleaning.
Step 22: if the current indoor environment temperature is not greater than the set temperature, controlling the air conditioner to directly run in a heating mode; and if the current indoor environment temperature is higher than the set temperature, controlling the air conditioner to firstly run in a refrigeration mode and then run in a heating mode.
If the current indoor environment temperature is not higher than the set temperature, the current indoor environment temperature is more appropriate and not very high. In this case, the air conditioner is controlled to directly operate in the heating mode in order to increase the self-cleaning speed and reduce the operation time and the operation energy consumption of the air conditioner as much as possible. And if the current indoor ambient temperature is greater than the set temperature, it indicates that the current indoor ambient temperature is too high, and if the heating mode is directly operated, the indoor ambient temperature may be higher, resulting in discomfort. In this case, the air conditioner is controlled to operate the cooling mode first so as to cool the room first, and then, to operate the heating mode.
In a preferred embodiment, the air conditioner is controlled to operate in the cooling mode, and the air conditioner is controlled to operate in the heating mode after the second setting condition is satisfied. Wherein the second setting condition includes: the current indoor environment temperature is not more than the set temperature or the running time of the refrigeration mode reaches the set refrigeration running time; the set cooling operation time is determined according to the indoor ambient temperature when the cooling mode is entered. If the second set condition is that the current indoor environment temperature is not greater than the set temperature, which indicates that the indoor temperature is reduced to a more appropriate temperature, the heating mode is switched to; if the second set time is the time when the operation time of the refrigeration mode reaches the set refrigeration operation time, the set refrigeration operation time is determined according to the indoor environment temperature when the refrigeration mode is entered, and a reasonable determination mode is adopted, so that the indoor temperature is reduced to a more appropriate temperature. Preferably, the higher the indoor ambient temperature is, the longer the cooling operation time is set to ensure sufficient reduction of the indoor temperature. For example, when the indoor environment temperature enters the refrigeration mode, the indoor environment temperature is more than 33 ℃, and the refrigeration running time is set to be 3 min; when the refrigerator enters a refrigeration mode, the indoor environment temperature is not more than 33 ℃ but more than 30 ℃, and the refrigeration running time is set to be 2 min; the indoor environment temperature when entering the refrigeration mode is not more than 30 ℃ but more than 27 ℃, and the refrigeration running time is set to be 1 min.
For the process of the cooling mode, the cooling mode in the prior art can be adopted for operation. As a preferred embodiment, in the cooling mode, the compressor is controlled to operate at a frequency not lower than the first set frequency. The first set frequency is preferably a large frequency value, such as a frequency value of high-frequency operation, so as to control the air conditioner to perform high-frequency rapid cooling and shorten the self-cleaning time. And after the second set condition is met, the compressor is controlled to reduce the frequency to the second set frequency, and then the air conditioner is controlled to operate in a heating mode. Wherein, the second setting frequency is less than the first setting frequency. The compressor is firstly subjected to frequency reduction and then is switched to a heating mode, so that the problem that the compressor is stopped due to impact of high frequency in the reversing process of the four-way valve on the compressor when the four-way valve is switched from the cooling mode to the heating mode is avoided.
For the heating mode process, the heating mode in the prior art can be adopted for operation. In the heating mode, a target frequency of the compressor is determined according to a set target coil temperature, and the compressor is controlled according to the target frequency of the compressor. Specifically, the real-time coil temperature of the indoor unit is obtained, the difference value between the real-time coil temperature and the set target coil temperature is calculated, PID operation is executed based on the difference value, and the target frequency of the compressor is determined. The method of performing the PID operation based on the difference value is prior art and will not be described in detail herein. The real-time coil temperature is detected in real time by using an indoor unit coil temperature sensor according to a set sampling frequency, and a target coil temperature is set to be a preset target temperature. The determination of the set target coil temperature follows the principle that the temperature is reduced as much as possible on the basis of locally heating and dehumidifying the part near the indoor heat exchanger, particularly around the filter screen to the required humidity, so that the phenomenon that the comfort is influenced by the temperature rise of the indoor environment caused by the temperature rise is avoided, and meanwhile, the energy consumption of the air conditioner in operation is reduced as much as possible. Preferably, the target coil temperature is set to 48 ℃.
In other preferred embodiments, in the heating mode, the wind speed of the indoor fan is also controlled to be less than the set wind speed. Wherein the set wind speed is also a preset value and can be modified by authorization. For example, the set wind speed is a wind speed corresponding to a breeze, the wind speed of the indoor fan is controlled to be smaller than the set wind speed, and the wind speed of the indoor fan can be controlled to be a mute wind speed smaller than the wind speed corresponding to the breeze. The wind speed to indoor fan is injectd, can not too big, and the purpose is to avoid too big wind speed to blow into the indoor high temperature rise that leads to and influence the travelling comfort with high temperature wind, can also avoid too big wind speed to be unfavorable for local temperature rise around the filter screen and influence dehumidification effect simultaneously.
Step 23: when the air conditioner is controlled to operate in a heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen.
Wherein the first setting condition includes: the current ambient humidity is not greater than the set ambient humidity and/or the operation time of the heating mode reaches the set heating operation time. And the set heating operation time is determined according to the ambient humidity at the time of entering the heating mode. The current environment humidity refers to the indoor environment humidity of the indoor unit obtained by adopting a humidity sensor according to a set sampling frequency. The set environmental humidity is a preset humidity value, preferably, when the environmental humidity is not more than the set environmental humidity, the adhesive force of dust on the filter screen is small, and impurities such as the dust are easily cleaned from the filter screen.
There may be a certain difference between the current ambient humidity and the humidity around the filter screen, and therefore, as a more preferred embodiment, the first setting condition is that the operation time of the heating mode reaches the set heating operation time, and the set heating operation time is determined according to the ambient humidity when the heating mode is entered. Moreover, the larger the ambient humidity is, the longer the heating operation time is set to ensure sufficient dehumidification of the periphery of the filter screen. In addition, the first setting condition may be that, in the heating mode, a maintaining time during which the indoor coil temperature is stabilized at the set target coil temperature reaches the set maintaining time. The set holding time is also determined based on the ambient humidity at the time of entering the heating mode. The larger the ambient humidity is, the longer the set holding time is to ensure sufficient dehumidification around the filter screen. For example, the ambient humidity when entering the heating mode is less than 40% (relative humidity), and the set holding time is 2 min; when the heating mode is entered, the environmental humidity is less than 60 percent and not less than 40 percent, and the setting maintaining time is 3 min; when the heating mode is entered, the environmental humidity is less than 80% and not less than 60%, and the setting maintaining time is 5 min; the environmental humidity when entering the heating mode is more than 80%, and the set maintaining time is 7 min.
When the air conditioner is controlled to operate in the heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen. At this moment, through the operation of the heating mode and the judgment of the first set condition, the adhesion force of impurities such as dust on the filter screen can be reduced by the humidity around the filter screen, and the impurities can be easily swept down by the self-cleaning mechanism, so that the self-cleaning cleanliness of the filter screen is improved.
By adopting the self-cleaning control method, after entering the self-cleaning mode, if the indoor environment temperature is higher, the air conditioner is controlled to operate in a cooling mode, the indoor temperature is reduced, and then the air conditioner is controlled to operate in a heating mode; if the indoor environment temperature is not high, controlling the air conditioner to directly run in a heating mode; after a certain condition is met in the heating operation mode, the self-cleaning mechanism is started to clean the filter screen; by controlling the air conditioner to operate in a heating mode, the temperature near a heat exchanger of the indoor unit, particularly around the filter screen can be increased, and the humidity around the filter screen is further reduced; the humidity around the filter screen is reduced, and the adhesive force of impurities such as dust on the filter screen can be reduced; then when the self-cleaning mechanism is started to clean the filter screen, impurities such as dust and the like can be smoothly removed from the filter screen, so that the cleaning degree of the self-cleaning of the filter screen is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (8)
1. A self-cleaning control method of an air conditioner, the air conditioner comprises a self-cleaning mechanism for cleaning a filter screen, and the method is characterized by comprising the following steps:
after the air conditioner enters a self-cleaning mode, controlling the air conditioner to run in a heating mode;
when the air conditioner is controlled to operate in the heating mode, if a first set condition is met, the self-cleaning mechanism is started to clean the filter screen;
the first setting condition includes: the current environment humidity is not more than the set environment humidity and/or the operation time of the heating mode reaches the set heating operation time; the set heating running time is determined according to the ambient humidity when the heating mode is entered;
in the heating mode, determining a target frequency of a compressor according to a set target coil temperature, and controlling the compressor according to the target frequency of the compressor;
the first set condition further includes that in the heating mode, a maintaining time for an indoor coil temperature to stabilize at the set target coil temperature reaches a set maintaining time; the set maintaining time is determined according to the ambient humidity when the heating mode is entered.
2. The control method according to claim 1, wherein determining the target frequency of the compressor based on the set target coil temperature specifically comprises:
the method comprises the steps of obtaining the real-time coil temperature of an indoor unit, calculating the difference value between the real-time coil temperature and the set target coil temperature, executing PID operation based on the difference value, and determining the target frequency of the compressor.
3. The control method according to claim 1, wherein in the heating mode, a wind speed of an indoor fan is controlled to be less than a set wind speed.
4. The control method according to any one of claims 1 to 3, wherein after the air conditioner enters the self-cleaning mode, controlling the air conditioner to operate in a heating mode specifically comprises:
after the air conditioner enters a self-cleaning mode, acquiring the current indoor environment temperature, and comparing the current indoor environment temperature with a set temperature;
if the current indoor environment temperature is not higher than the set temperature, controlling the air conditioner to directly run the heating mode; and if the current indoor environment temperature is higher than the set temperature, controlling the air conditioner to firstly operate the refrigeration mode and then operate the heating mode.
5. The control method according to claim 4, wherein the controlling the air conditioner to operate the cooling mode first and then to operate the heating mode comprises:
controlling the air conditioner to operate in a refrigeration mode, and controlling the air conditioner to operate in a heating mode after a second set condition is met;
the second setting condition includes: the current indoor environment temperature is not more than the set temperature or the running time of the refrigeration mode reaches the set refrigeration running time; the set refrigerating operation time is determined according to the indoor environment temperature when the refrigerator enters the refrigerating mode.
6. The control method according to claim 5, wherein in the cooling mode, the compressor is controlled to operate at a frequency not lower than a first set frequency; after the second set condition is met, firstly controlling the compressor to reduce the frequency to a second set frequency, and then controlling the air conditioner to operate the heating mode; the second set frequency is less than the first set frequency.
7. The control method according to any one of claims 1 to 3, characterized in that the method further comprises:
and controlling the air conditioner to enter the self-cleaning mode after the self-cleaning condition is met.
8. The control method according to claim 7, wherein the self-cleaning condition includes receiving a self-cleaning control instruction and/or reaching a set accumulated operating time since the last self-cleaning of an accumulated operating time of the air conditioner.
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| CN109764502B (en) * | 2019-03-08 | 2020-09-11 | 广东美的制冷设备有限公司 | Air conditioner, method of controlling the same, and computer-readable storage medium |
| CN110469940B (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 |
| 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 |
| CN110887179A (en) * | 2019-10-17 | 2020-03-17 | 珠海格力电器股份有限公司 | Air conditioner filter screen cleaning control method, computer readable storage medium and air conditioner |
| CN111928431B (en) * | 2020-07-20 | 2021-12-14 | 海信（山东）空调有限公司 | Control method of air conditioner |
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