CN112432305B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN112432305B CN112432305B CN202011147977.8A CN202011147977A CN112432305B CN 112432305 B CN112432305 B CN 112432305B CN 202011147977 A CN202011147977 A CN 202011147977A CN 112432305 B CN112432305 B CN 112432305B
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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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- 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
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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
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
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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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- Air Conditioning Control Device (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
The invention provides an air conditioner and a control method thereof, wherein the control method comprises the following steps: acquiring the bacterial pollution grade of an indoor unit heat exchanger of the air conditioner; determining a sterilization mode corresponding to the bacterial contamination level; and controlling the air conditioner to operate according to a sterilization mode so as to sterilize the heat exchanger of the indoor unit. The control method is suitable for both common air conditioners and intelligent air conditioners. The air conditioner determines the sterilization mode according to the bacterial pollution level of the indoor unit heat exchanger, can sterilize according to the bacterial pollution condition of the indoor unit heat exchanger, improves the intelligent degree, and simultaneously can improve the adjustment precision of the air conditioner, optimize the sterilization effect and save energy consumption.
Description
Technical Field
The present invention relates to air conditioning technology, and is especially air conditioner and its control method.
Background
The air conditioner is used for adjusting air parameters of indoor working environment. However, as the service life of the air conditioner is prolonged, the indoor heat exchanger of the air conditioner is dirty, and even bacteria can grow, when the indoor heat exchanger is adhered with bacteria, if the indoor heat exchanger is not cleaned in time, the running of the air conditioner can threaten the health of users.
In the prior art, although part of air conditioners have a sterilization function, the sterilization mode is quite single, a proper sterilization mode cannot be selected according to the bacterial pollution condition of an indoor unit heat exchanger, the intelligent degree is low, the sterilization effect is difficult to guarantee, and unnecessary energy consumption can be generated.
Therefore, how to increase the intelligence degree of the air conditioner to sterilize according to the bacterial pollution condition of the indoor unit heat exchanger becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
An object of the present invention is to provide an air conditioner and a control method thereof that at least partially solve the above problems.
A further object of the present invention is to increase the degree of intelligence of the air conditioner so that it can sterilize according to the bacterial contamination of the heat exchanger of the indoor unit.
Still another further object of the present invention is to improve the adjustment accuracy of the air conditioner and optimize the sterilization effect.
Another further object of the present invention is to improve the purification effect of the air conditioner.
Another further object of the present invention is to simplify the structure of the air conditioner and reduce the manufacturing cost.
It is still another object of the present invention to simplify the control logic of the air conditioner and to improve the operation efficiency.
According to an aspect of the present invention, there is provided a control method of an air conditioner, including: acquiring the bacterial pollution grade of an indoor unit heat exchanger of the air conditioner; determining a sterilization mode corresponding to the bacterial contamination level; and controlling the air conditioner to operate according to a sterilization mode so as to sterilize the heat exchanger of the indoor unit.
Optionally, the step of obtaining the bacterial contamination level of the heat exchanger of the indoor unit of the air conditioner comprises: acquiring an air quality record of a working environment where an indoor unit of the air conditioner is located, wherein the air quality record is used for recording the corresponding relation between the concentration of air bacteria and time in the previous working environment; and determining the bacterial pollution grade of the heat exchanger of the indoor unit according to the air quality record.
Optionally, the step of determining the bacterial pollution level of the heat exchanger of the indoor unit according to the air quality record comprises: determining the accumulated time length of the air bacteria concentration exceeding a preset concentration threshold according to the air quality record; and determining the bacterial pollution grade of the heat exchanger of the indoor unit according to the accumulated time length, wherein the bacterial pollution grade comprises a light pollution grade, a moderate pollution grade and a severe pollution grade.
Optionally, the step of determining the bacterial contamination level of the heat exchanger of the indoor unit according to the accumulated time period includes: judging whether the accumulated time length is greater than a first preset time length or not; if so, determining the bacterial contamination level as a severe contamination level; if not, further judging whether the accumulated time length is greater than a second preset time length, wherein the second preset time length is less than the first preset time length; if yes, determining the bacterial pollution grade as a moderate pollution grade; if not, determining that the bacterial pollution level is a light pollution level under the condition that the accumulated time length is longer than a third preset time length, wherein the third preset time length is shorter than the second preset time length.
Optionally, the sterilization mode includes a temperature processing mode for adjusting the temperature of the indoor unit heat exchanger, an ultraviolet processing mode for emitting ultraviolet light to the indoor unit heat exchanger, and a composite processing mode for adjusting the temperature of the indoor unit heat exchanger and emitting ultraviolet light to the indoor unit heat exchanger; and in the step of determining the sterilization mode corresponding to the bacterial contamination level, the sterilization mode corresponding to the light contamination level is an ultraviolet treatment mode, the sterilization mode corresponding to the moderate contamination level is a temperature treatment mode, and the sterilization mode corresponding to the heavy contamination level is a composite treatment mode.
Optionally, the step of controlling the air conditioner to operate in the sterilization mode includes: acquiring sterilization parameters corresponding to the sterilization mode; and controlling the air conditioner to operate according to the sterilization parameters.
Optionally, in a case that the sterilization mode is determined to be the temperature processing mode, the sterilization parameter corresponding to the temperature processing mode includes a target coil temperature of the heat exchanger of the indoor unit; under the condition that the sterilization mode is determined to be the ultraviolet treatment mode, the sterilization parameters corresponding to the ultraviolet treatment mode comprise ultraviolet irradiation time length; and under the condition that the sterilization mode is determined to be the composite processing mode, the sterilization parameters corresponding to the sterilization mode comprise the ultraviolet irradiation duration and the target coil temperature of the heat exchanger of the indoor unit.
Optionally, the step of controlling the air conditioner to operate according to the target coil temperature includes: acquiring the current initial coil temperature of the heat exchanger of the indoor unit; determining the operating frequency of a compressor of the air conditioner according to the difference between the target coil temperature and the initial coil temperature; and controlling the compressor to run according to the running frequency so that the temperature of the heat exchanger of the indoor unit reaches the target coil temperature.
Optionally, before obtaining the bacterial contamination level of the heat exchanger of the indoor unit of the air conditioner, the method further comprises: and acquiring a signal for finishing self-cleaning of the air conditioner.
According to another aspect of the present invention, there is also provided an air conditioner having an indoor unit heat exchanger, further comprising: a processor and a memory, the memory having stored therein a control program for implementing the control method according to any one of the above when the control program is executed by the processor.
According to the air conditioner and the control method thereof, the bacterial pollution grade of the heat exchanger of the indoor unit of the air conditioner is obtained, the sterilization mode corresponding to the bacterial pollution grade is determined, the air conditioner is controlled to operate according to the sterilization mode, and therefore the heat exchanger of the indoor unit is sterilized, the air conditioner can sterilize according to the condition that the heat exchanger of the indoor unit is polluted by bacteria, and the intelligent degree is improved.
Further, according to the air conditioner and the control method thereof, a proper sterilization mode is selected according to the bacterial pollution level of the heat exchanger of the indoor unit, so that the air conditioner can be sterilized in a targeted manner, the adjustment precision of the air conditioner is improved, the sterilization effect is optimized, and the energy consumption is saved.
Furthermore, the air conditioner and the control method thereof can firstly utilize the self-cleaning function to clean pollutants such as dust and the like adhered to the surface of the heat exchanger of the indoor unit, and then utilize the sterilization function to clean bacteria adhered to the surface of the heat exchanger of the indoor unit, thereby being beneficial to improving the purification effect of the air conditioner, enabling the heat exchanger of the indoor unit to be fresh, and being beneficial to promoting the heat exchanger of the indoor unit to normally exert the air temperature regulation function.
Furthermore, according to the air conditioner and the control method thereof, the air quality record of the working environment where the indoor unit of the air conditioner is located is obtained, and the bacterial pollution level of the heat exchanger of the indoor unit can be determined according to the air quality record, so that other detection devices for detecting the bacterial pollution level of the heat exchanger of the indoor unit are not required to be specially installed, the structure of the air conditioner can be simplified, and the manufacturing cost is reduced.
Furthermore, according to the air conditioner and the control method thereof, the accumulated time length that the concentration of the air bacteria in the air quality record exceeds the preset concentration threshold value is obtained, the bacterial pollution level of the heat exchanger of the indoor unit can be determined according to the accumulated time length, the calculation process is simple, the control logic of the air conditioner is simplified, and the operation efficiency of the air conditioner is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of an air conditioner according to one embodiment of the present invention;
fig. 2 is a schematic view of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of a control method of an air conditioner according to an embodiment of the present invention;
fig. 4 is a control flowchart of an air conditioner according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic block diagram of an air conditioner 10 according to one embodiment of the present invention.
The air conditioner 10 may generally include, divided in an overall structure: an ultraviolet sterilization module, a refrigeration system 110, a processor 120, and a memory 130.
The refrigeration system 110 may be a compression refrigeration system 110. The air conditioner 10 may generally include, in terms of installation location division of components: indoor units 150 and outdoor units. The indoor unit 150 and the outdoor unit of the air conditioner 10 perform cooling and heating cycles of the air conditioner 10 by means of efficient cooperative operation, thereby achieving cooling and heating adjustment of the indoor temperature. The refrigeration system 110 may include a compressor, an outdoor heat exchanger, and an indoor heat exchanger.
Fig. 2 is a schematic view of an indoor unit 150 of the air conditioner 10 according to an embodiment of the present invention. The indoor unit 150 may include a cabinet 151 and an indoor unit heat exchanger (not shown) disposed inside the cabinet 151.
The indoor unit 150 of the present embodiment may be a vertical type, such as a square cabinet or a circular cabinet, or may be a wall-mounted type, but is not limited thereto. Fig. 2 is only an example of the indoor unit 150 of the wall-mounted air conditioner 10, and those skilled in the art should be able to fully expand the indoor unit to other models without one being shown here.
The air conditioner 10 of the present embodiment has a sterilization function. The ultraviolet sterilization module may be disposed in the indoor unit 150 of the air conditioner 10, and is configured to emit ultraviolet light to the indoor unit heat exchanger to perform sterilization on the indoor unit heat exchanger. The ultraviolet sterilization module can be an ultraviolet lamp.
In some embodiments, the air conditioner 10 may further include an air quality detecting device disposed in the casing 151 of the indoor unit 150 or any other location in the working environment of the indoor unit 150, for detecting the air quality of the working environment, such as the concentration of air bacteria in the working environment. The air bacteria in the working environment can be one or more of bacteria such as mites, tubercle bacillus, hemolytic coccus, diphtheria bacillus, bordetella pertussis and the like. When the air bacteria in the working environment are various bacteria, the air bacteria concentration may refer to the sum of the concentrations of all bacteria.
In other alternative embodiments, the air conditioner 10 may not be provided with an air quality detection device separately. The air conditioner 10 may establish a data connection with an external air quality detection device in advance, for example, the air conditioner 10 may be paired with the air quality detection device in a wireless communication manner such as bluetooth or Wifi, so as to implement pre-binding. When the air conditioner 10 needs to query the air quality record of the working environment, a query request may be sent to the air quality detection device in data connection with the air conditioner 10, which is advantageous for reducing the manufacturing cost of the air conditioner 10.
In other embodiments, the air conditioner 10 may further include a temperature detecting device disposed on the indoor unit heat exchanger for detecting the temperature of the indoor unit heat exchanger. The temperature of the heat exchanger of the indoor unit can be the temperature of the coil pipe.
The processor 120 and the memory 130 may form a control device, and the control device may be provided in the indoor unit 150. The memory 130 stores therein a control program 131, and the control program 131 is executed by the processor 120 to implement the control method of the air conditioner 10 according to any one of the following embodiments. The processor 120 may be a Central Processing Unit (CPU), or a digital processing unit (DSP), etc. The memory 130 is used to store programs executed by the processor 120. The memory 130 may be any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto. The memory 130 may also be a combination of various memories 130. Since the control program 131 is executed by the processor 120 to implement the processes of the following method embodiments and achieve the same technical effects, the details are not repeated herein to avoid repetition.
Fig. 3 is a schematic diagram of a control method of the air conditioner 10 according to an embodiment of the present invention. The control method may generally include:
step S302, a bacterial contamination level of the heat exchanger of the indoor unit of the air conditioner 10 is obtained. The bacterial contamination levels may include a light contamination level, a moderate contamination level, and a heavy contamination level. The bacterial pollution grade can be used for representing the degree of bacterial pollution of the heat exchanger of the indoor unit. The higher the bacterial contamination level, the more bacteria adhered to the indoor unit heat exchanger.
In step S304, a sterilization mode corresponding to the bacterial contamination level is determined. The air conditioner 10 of the present embodiment may be preset with a plurality of different sterilization modes, each sterilization mode being set corresponding to a bacterial contamination level. The sterilization mode may include a temperature treatment mode for adjusting a temperature of the indoor unit heat exchanger, an ultraviolet treatment mode for irradiating ultraviolet rays to the indoor unit heat exchanger, and a composite treatment mode for adjusting a temperature of the indoor unit heat exchanger and for emitting ultraviolet rays to the indoor unit heat exchanger.
And step S306, controlling the air conditioner 10 to operate according to a sterilization mode so as to sterilize the indoor unit heat exchanger. That is, the air conditioner 10 is controlled to start sterilization of the indoor unit heat exchanger in accordance with the determined sterilization mode.
That is, the air conditioner 10 of the present embodiment is preset with three different sterilization modes, i.e., a temperature treatment mode, an ultraviolet treatment mode, and a composite treatment mode. When the air conditioner 10 performs sterilization processing on the indoor unit heat exchanger in the temperature processing mode, high-temperature sterilization can be performed by using high temperature generated by the indoor unit heat exchanger by adjusting the temperature of the indoor unit heat exchanger. When the air conditioner 10 performs sterilization processing on the indoor unit heat exchanger in the ultraviolet processing mode, the ultraviolet sterilization module may be started to perform ultraviolet sterilization using ultraviolet light emitted in the ultraviolet sterilization mode. When the air conditioner 10 adopts the composite processing mode, the air conditioner 10 performs the high temperature sterilization and the ultraviolet sterilization at the same time, that is, controls the temperature of the heat exchanger of the indoor unit and the ultraviolet sterilization module at the same time.
By using the above method, the air conditioner 10 of the present embodiment controls the air conditioner 10 to operate according to the sterilization mode by obtaining the bacterial pollution level of the heat exchanger of the indoor unit of the air conditioner 10 and determining the sterilization mode corresponding to the bacterial pollution level, so as to perform sterilization treatment on the heat exchanger of the indoor unit, which enables the air conditioner 10 of the present embodiment to perform sterilization according to the situation that the heat exchanger of the indoor unit is polluted by bacteria, thereby improving the intelligent degree.
The proper sterilization mode is selected according to the bacterial pollution level of the heat exchanger of the indoor unit, so that the air conditioner 10 of the embodiment can be sterilized in a targeted manner, the adjustment precision of the air conditioner 10 is improved, the sterilization effect is optimized, and the energy consumption is saved.
The air conditioner 10 of the present embodiment may have both the self-cleaning function and the sterilization function. In this embodiment, before the step S302, the control method may further include: a signal that the air conditioner 10 finishes self-cleaning is acquired. That is, the air conditioner 10 of the present embodiment may perform sterilization after the indoor heat exchanger and/or the outdoor heat exchanger completes self-cleaning. In the self-cleaning process of the indoor unit heat exchanger, the indoor unit heat exchanger can be defrosted firstly and then is defrosted by adjusting the refrigerating system 110, so that pollutants such as dust and the like attached to the surface of the indoor unit heat exchanger are cleaned.
For example, a remote controller pre-bound with the air conditioner 10 may be provided with a self-cleaning key and a sterilization key. The user can select to start the self-cleaning function and the sterilization function according to actual needs.
In other alternative embodiments, the air conditioner 10 may also automatically detect the degree of contamination of the heat exchanger of the indoor unit, so as to automatically start the self-cleaning function and the sterilization function.
In still other alternative embodiments, the self-cleaning function and the sterilization function of the air conditioner 10 may be combined to form a sterilization washing function, for example, after the air conditioner 10 receives the sterilization washing command, the self-cleaning function may be performed first, and then the sterilization function may be performed. The self-cleaning function of the air conditioner 10 may include self-cleaning for an outdoor heat exchanger, and self-cleaning for an indoor heat exchanger. When the self-cleaning function is executed, the air conditioner 10 may first perform self-cleaning on the indoor unit heat exchanger, and after the indoor unit heat exchanger finishes self-cleaning and stands by for 2-5 min, control the four-way valve of the refrigeration system 110 to reverse, and then perform self-cleaning on the outdoor unit heat exchanger. During the defrosting process of the indoor unit heat exchanger and during the standby period of the air conditioner 10, the fan of the indoor unit 150 may be controlled to operate at a preset first self-cleaning rotation speed. When the outdoor heat exchanger is self-cleaned, the fan of the indoor unit 150 may be controlled to operate at a preset second self-cleaning rotation speed, and the second self-cleaning rotation speed may be greater than the first self-cleaning rotation speed. In some embodiments, when the air conditioner 10 needs to perform high temperature sterilization by using the high temperature generated by the indoor heat exchanger, the coil temperature of the indoor heat exchanger can be controlled after the indoor heat exchanger finishes self-cleaning and at the same time when the outdoor heat exchanger starts self-cleaning.
In the air conditioner 10 of the present embodiment, the self-cleaning function is firstly utilized to clean the contaminants such as dust adhered to the surface of the heat exchanger of the indoor unit, and then the sterilization function is utilized to clean the bacteria adhered to the surface of the heat exchanger of the indoor unit, which is beneficial to improving the purification effect of the air conditioner 10, enabling the heat exchanger of the indoor unit to be new, and facilitating the heat exchanger of the indoor unit to normally perform the air temperature adjusting function.
The step S302 may include: and acquiring an air quality record of the working environment where the indoor unit 150 of the air conditioner 10 is located, wherein the air quality record is used for recording the corresponding relation between the concentration of air bacteria and time in the previous working environment, and determining the bacterial pollution level of the heat exchanger of the indoor unit according to the air quality record.
By acquiring the air quality record of the working environment where the indoor unit 150 of the air conditioner 10 is located, the bacterial pollution level of the heat exchanger of the indoor unit can be determined according to the air quality record, so that other detection devices for detecting the bacterial pollution level of the heat exchanger of the indoor unit are not required to be specially installed, the structure of the air conditioner 10 can be simplified, and the manufacturing cost can be reduced.
The step of obtaining the air quality record of the working environment where the indoor unit 150 of the air conditioner 10 is located may include: an inquiry request is sent to an air quality detection device in data connection with the air conditioner 10 to obtain an air quality record. The air quality detection device can detect the air bacteria concentration once at preset time intervals. The preset time interval may be any value within a range of 1-30 min, for example, 5 min. The air quality records can be the air bacteria concentrations corresponding to different times in the previous working environment. For example, the air quality records may be the air bacteria concentrations corresponding to different times during the entire time period after the last time the air conditioner 10 turned off the sterilization function.
The step of determining the bacterial contamination level of the heat exchanger of the indoor unit according to the air quality record may comprise: and determining the accumulated time length when the air bacteria concentration exceeds a preset concentration threshold according to the air quality record, and determining the bacterial pollution grade of the heat exchanger of the indoor unit according to the accumulated time length, wherein the bacterial pollution grade comprises a light pollution grade, a moderate pollution grade and a heavy pollution grade.
The concentration threshold value can be set according to the air quality requirement of the working environment, and can be 2000-3000 cfu/m. In the step of obtaining the accumulated time length that the concentration of the air bacteria in the air quality record exceeds the preset concentration threshold, an air quality curve for representing the change of the concentration of the air bacteria along with time can be drawn by taking the concentration of the air bacteria as a vertical coordinate (dependent variable) and taking the time as a horizontal coordinate (independent variable) according to the corresponding relation between the time and the concentration of the air bacteria in the air quality record, and the time that the concentration of the air bacteria is greater than the preset concentration threshold is accumulated, so that the accumulated time length that the concentration of the air bacteria in the air quality record exceeds the concentration threshold can be obtained.
The step of determining the bacterial contamination level of the heat exchanger of the indoor unit according to the accumulated time period may include: judging whether the accumulated time length is greater than a first preset time length, if so, determining that the bacterial pollution level is a severe pollution level; if the accumulated time length is longer than a second preset time length and is less than or equal to a first preset time length, and the second preset time length is shorter than the first preset time length, determining that the bacterial pollution grade is a moderate pollution grade; and if the accumulated time length is longer than a third preset time length and is less than or equal to a second preset time length, and the third preset time length is shorter than the second preset time length, determining that the bacterial pollution grade is a light pollution grade. The first preset duration may be determined according to the time span of the air quality record (i.e., the time length of the time argument in the air quality curve). For example, if the time span of the air quality record is 168h, the first preset time period may be 70% of the time span of the air quality record, the second preset time period may be 50% of the time span of the air quality record, and the second preset time period may be 30% of the time span of the air quality record.
In the above step S304, the sterilization mode corresponding to the light contamination level may be an ultraviolet processing mode, the sterilization mode corresponding to the moderate contamination level may be a temperature processing mode, and the sterilization mode corresponding to the heavy contamination level may be a composite processing mode.
If the cumulative time length that the air bacteria concentration is greater than the preset concentration threshold value is less than or equal to the third preset time length, which indicates that the degree of bacterial contamination of the indoor unit heat exchanger is low, the sterilization function of the air conditioner 10 may not be started at this time.
The bacterial pollution level of the heat exchanger of the indoor unit can be determined according to the accumulated time length by acquiring the accumulated time length when the concentration of the air bacteria in the air quality record exceeds the preset concentration threshold value, the calculation process is simple, the control logic of the air conditioner 10 is simplified, and the operation efficiency of the air conditioner 10 is improved.
The step S306 may include: and acquiring sterilization parameters corresponding to the sterilization mode, and controlling the air conditioner 10 to operate according to the sterilization parameters. The sterilization parameters may refer to the operation parameters of the air conditioner 10 corresponding to each sterilization mode.
And if the sterilization mode is determined to be the temperature processing mode, the sterilization parameter corresponding to the temperature processing mode can comprise the target coil temperature of the heat exchanger of the indoor unit. In the case where it is determined that the sterilization mode is the ultraviolet treatment mode, the sterilization parameter corresponding to the ultraviolet treatment mode may include an ultraviolet irradiation time period. In the case that the sterilization mode is determined to be the composite processing mode, the sterilization parameters corresponding to the sterilization mode may include the ultraviolet irradiation duration and the target coil temperature of the indoor unit heat exchanger. The ultraviolet irradiation time and the target coil temperature can be preset values.
The target coil temperature of the indoor unit heat exchanger can be preset according to the air bacterium type and the average content of the working environment. For example, in the cities of Beijing, Tianjin, Tangshan, etc., the target coil temperature may be any value within the range of 50-65 ℃, for example, 60 ℃.
In the case where it is determined that the sterilization mode is the temperature treatment mode or the composite treatment mode, the step of controlling the air conditioner 10 to operate at the target coil temperature may include: the method comprises the steps of obtaining the current initial coil temperature of an indoor unit heat exchanger, determining the operating frequency of a compressor of the air conditioner 10 according to the difference value between the target coil temperature and the initial coil temperature, and controlling the compressor of the air conditioner 10 to operate according to the operating frequency, so that the temperature of the indoor unit heat exchanger reaches the target coil temperature.
The operation frequency of the compressor of the air conditioner 10 is determined according to the difference value between the target coil temperature and the initial coil temperature, the air conditioner 10 is controlled to operate according to the determined operation frequency of the compressor, the temperature of the heat exchanger of the indoor unit can quickly reach the target coil temperature in a short time, and therefore the high-temperature sterilization stage can be quickly started, and the sterilization efficiency is improved.
Since the means for adjusting the operating frequency of the compressor according to the temperature of the coil is well known to those skilled in the art, the method for adjusting the operating frequency of the compressor will not be described herein. In this embodiment, the temperature of the heat exchanger of the indoor unit can be stabilized at the target coil temperature by controlling the operating frequency of the compressor. When the temperature of the indoor heat exchanger is stabilized at the target coil temperature and the time length exceeds the preset high-temperature sterilization time length, the temperature control of the indoor heat exchanger can be stopped. The high-temperature sterilization time can be any value within the range of 10-30 min.
When the sterilization mode is the temperature processing mode, if the time period during which the temperature of the heat exchanger of the indoor unit is stabilized at the target coil temperature exceeds the preset high-temperature sterilization time period, the air conditioner 10 may be controlled to exit the sterilization mode, for example, the compressor may be turned off.
In some optional embodiments, in the step of controlling the air conditioner 10 to operate according to the target coil temperature when the sterilization mode is determined to be the temperature processing mode or the composite processing mode, while adjusting the operating frequency of the compressor, the rotation speed of the fan of the indoor unit 150 of the air conditioner 10 may also be adjusted, so that the fan of the indoor unit 150 operates according to the preset sterilization rotation speed, so as to cause the air in the working environment of the indoor unit 150 to enter the casing 151, flow through the indoor unit heat exchanger, and then flow out of the air supply outlet of the casing 151, thereby forming a processing air flow, which enables the air conditioner 10 of this embodiment to perform high-temperature sterilization processing on the indoor unit heat exchanger, and perform high-temperature sterilization processing on bacteria remaining in the working environment, thereby facilitating improvement of the sterilization effect of the air conditioner 10. When the air conditioner 10 is controlled to exit the sterilization mode, the indoor unit 150 fan may be turned off.
When the sterilization mode is the composite processing mode, if the time length for stabilizing the temperature of the indoor unit heat exchanger at the target coil temperature exceeds the preset high-temperature sterilization time length and the time length for starting the ultraviolet sterilization module to emit ultraviolet light to the indoor unit heat exchanger reaches the preset ultraviolet irradiation time length, the air conditioner 10 may be controlled to exit the sterilization mode, for example, the compressor and the ultraviolet sterilization module may be turned off. The ultraviolet irradiation duration can be preset according to the power of the ultraviolet sterilization module and the air bacterium type and average content of the working environment. For example, in the cities of Beijing, Tianjin, Tangshan, etc., if the power of the ultraviolet sterilization module is 9-17W, the ultraviolet irradiation time period can be any value within the range of 15-60 min.
Under the condition that the sterilization mode is determined to be the ultraviolet processing mode, if the time length for starting the ultraviolet sterilization module to emit ultraviolet light to the heat exchanger of the indoor unit reaches the ultraviolet irradiation time length, the air conditioner 10 may be controlled to exit the sterilization mode, for example, the ultraviolet sterilization module may be turned off.
Fig. 4 is a control flowchart of the air conditioner 10 according to an embodiment of the present invention.
In step S402, a signal indicating that the air conditioner 10 finishes self-cleaning is obtained.
In step S404, an air quality record of the working environment where the indoor unit 150 of the air conditioner 10 is located is obtained. The air quality record is used to record the correspondence between the concentration of airborne bacteria and the time in the previous work environment.
And step S406, determining the accumulated time length for the air bacteria concentration to exceed the preset concentration threshold according to the air quality record.
Step S408, determining whether the accumulated time length exceeds a first preset time length, if yes, performing step S410, and if not, performing step S426.
And step S410, determining the bacterial pollution grade of the heat exchanger of the indoor unit as a heavy pollution grade.
In step S412, it is determined that the sterilization mode of the air conditioner 10 is the composite processing mode.
Step S414, obtaining a preset ultraviolet irradiation duration.
And step S416, controlling the operation of the ultraviolet sterilization module according to the ultraviolet irradiation duration.
And step S418, acquiring a preset target coil temperature.
And step S420, acquiring the current initial coil temperature of the heat exchanger of the indoor unit.
In step S422, the operating frequency of the compressor is determined according to the difference between the target coil temperature and the initial coil temperature.
And step S424, controlling the compressor to run according to the running frequency, so that the temperature of the heat exchanger of the indoor unit reaches the target coil temperature.
In step S426, it is determined whether the accumulated time duration is greater than a second preset time duration, if so, step S428 is executed, and if not, step S432 is executed.
And step 428, determining the bacterial pollution level of the heat exchanger of the indoor unit to be a moderate pollution level.
In step S430, it is determined that the sterilization mode of the air conditioner 10 is the temperature process mode.
And step S432, determining the bacterial pollution level of the heat exchanger of the indoor unit as a light pollution level under the condition that the accumulated time length is greater than a third preset time length.
In step S434, it is determined that the sterilization mode of the air conditioner 10 is the ultraviolet treatment mode.
Step S436, acquiring a preset ultraviolet irradiation duration.
And step 438, controlling the operation of the ultraviolet sterilization module according to the ultraviolet irradiation duration.
The control method of the embodiment is suitable for both a common air conditioner and an intelligent air conditioner. By using the above method, the air conditioner 10 and the control method thereof in this embodiment control the air conditioner 10 to operate according to the sterilization mode by acquiring the bacterial pollution level of the heat exchanger of the indoor unit of the air conditioner 10 and determining the sterilization mode corresponding to the bacterial pollution level, so as to perform sterilization treatment on the heat exchanger of the indoor unit, so that the air conditioner 10 in this embodiment can perform sterilization according to the situation that the heat exchanger of the indoor unit is polluted by bacteria, thereby improving the intelligent degree.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (9)
1. A control method of an air conditioner, comprising:
acquiring the bacterial pollution grade of an indoor unit heat exchanger of the air conditioner;
determining a sterilization mode corresponding to the bacterial contamination level;
controlling the air conditioner to operate according to the sterilization mode so as to sterilize the heat exchanger of the indoor unit; wherein
The step of obtaining the bacterial pollution grade of the heat exchanger of the indoor unit of the air conditioner comprises the following steps:
acquiring an air quality record of a working environment where an indoor unit of the air conditioner is located, wherein the air quality record is used for recording the corresponding relation between the concentration of air bacteria and time in the working environment;
determining the accumulated time length of the air bacteria concentration exceeding a preset concentration threshold according to the air quality record;
and determining the bacterial pollution grade of the heat exchanger of the indoor unit according to the accumulated time length.
2. The control method according to claim 1, wherein
The bacterial contamination levels include a light contamination level, a moderate contamination level, and a heavy contamination level.
3. The control method according to claim 1, wherein
The step of determining the bacterial pollution grade of the indoor unit heat exchanger according to the accumulated time length comprises the following steps:
judging whether the accumulated time length is greater than a first preset time length or not;
if so, determining the bacterial contamination grade as a severe contamination grade;
if not, further judging whether the accumulated time length is greater than a second preset time length, wherein the second preset time length is less than the first preset time length;
if so, determining the bacterial contamination level as a moderate contamination level;
if not, determining that the bacterial pollution level is a light pollution level under the condition that the accumulated time length is longer than a third preset time length, wherein the third preset time length is shorter than the second preset time length.
4. The control method according to claim 2, wherein
The sterilization mode comprises a temperature processing mode for adjusting the temperature of the indoor unit heat exchanger, an ultraviolet processing mode for emitting ultraviolet rays to the indoor unit heat exchanger and a composite processing mode for adjusting the temperature of the indoor unit heat exchanger and emitting ultraviolet rays to the indoor unit heat exchanger; and is
In the step of determining the sterilization mode corresponding to the bacterial contamination level, the sterilization mode corresponding to the light contamination level is the ultraviolet treatment mode, the sterilization mode corresponding to the medium contamination level is the temperature treatment mode, and the sterilization mode corresponding to the heavy contamination level is the composite treatment mode.
5. The control method according to claim 1, wherein
The step of controlling the air conditioner to operate in the sterilization mode includes:
acquiring sterilization parameters corresponding to the sterilization mode;
and controlling the air conditioner to operate according to the sterilization parameters.
6. The control method according to claim 4, wherein
Under the condition that the sterilization mode is determined to be a temperature processing mode, the sterilization parameters corresponding to the temperature processing mode comprise the target coil temperature of the indoor unit heat exchanger;
under the condition that the sterilization mode is determined to be an ultraviolet treatment mode, the sterilization parameters corresponding to the ultraviolet treatment mode comprise ultraviolet irradiation time length; and is
And under the condition that the sterilization mode is determined to be the composite processing mode, the sterilization parameters corresponding to the sterilization mode comprise the ultraviolet irradiation duration and the target coil temperature of the heat exchanger of the indoor unit.
7. The control method according to claim 6, wherein
The step of controlling the air conditioner to operate according to the target coil temperature comprises the following steps:
acquiring the current initial coil temperature of the indoor unit heat exchanger;
determining an operating frequency of a compressor of the air conditioner according to a difference between the target coil temperature and the initial coil temperature;
and controlling the compressor to operate according to the operating frequency, so that the temperature of the heat exchanger of the indoor unit reaches the target coil temperature.
8. The control method according to claim 1, wherein before obtaining the bacterial pollution level of the indoor unit heat exchanger of the air conditioner, the method further comprises the following steps:
and acquiring a signal for finishing self-cleaning of the air conditioner.
9. An air conditioner, it has indoor set heat exchanger, still includes:
a processor and a memory, the memory having stored therein a control program for implementing the control method according to any one of claims 1-8 when executed by the processor.
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| US20230024439A1 (en) * | 2021-07-23 | 2023-01-26 | Haier Us Appliance Solutions, Inc. | Air conditioner unit and methods of operation |
| CN114216222A (en) * | 2021-11-09 | 2022-03-22 | 青岛海尔空调器有限总公司 | Air conditioner bacterium visualization control method and system, electronic device and medium |
| CN114234355B (en) * | 2021-12-24 | 2022-10-28 | 珠海格力电器股份有限公司 | Air conditioner cleaning method and device, electronic equipment and computer readable storage medium |
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| CN107270400B (en) * | 2017-07-01 | 2020-08-25 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit with air purification function and control method thereof |
| CN110822631A (en) * | 2018-08-07 | 2020-02-21 | 青岛海尔空调器有限总公司 | Air conditioner and self-cleaning method thereof |
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| CN111397127A (en) * | 2020-03-27 | 2020-07-10 | 广东美的制冷设备有限公司 | Sterilization control method and device of air conditioner, storage medium and control equipment |
| CN111706961A (en) * | 2020-05-22 | 2020-09-25 | 珠海格力电器股份有限公司 | Control method of sterilization device, sterilization device and air conditioner |
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