CN114857675B - Air conditioner and sterilization control method thereof - Google Patents

Air conditioner and sterilization control method thereof Download PDF

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Publication number
CN114857675B
CN114857675B CN202210461385.6A CN202210461385A CN114857675B CN 114857675 B CN114857675 B CN 114857675B CN 202210461385 A CN202210461385 A CN 202210461385A CN 114857675 B CN114857675 B CN 114857675B
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CN
China
Prior art keywords
ultraviolet sterilization
sterilization module
time length
air conditioner
limit value
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Application number
CN202210461385.6A
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Chinese (zh)
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CN114857675A (en
Inventor
胡碧君
郭全丽
张书铭
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Hisense Guangdong Air Conditioning Co Ltd
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Hisense Guangdong Air Conditioning Co Ltd
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Priority to CN202210461385.6A priority Critical patent/CN114857675B/en
Publication of CN114857675A publication Critical patent/CN114857675A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • 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
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • 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
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • 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
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • 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
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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

Abstract

The invention discloses an air conditioner and a sterilization control method of the air conditioner. The air conditioner includes: an indoor fan and an outdoor fan; a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer; an outdoor heat exchanger and an indoor heat exchanger, wherein one of the two heat exchangers works as a condenser and the other works as an evaporator; the ultraviolet sterilization module is used for sterilizing the evaporator through ultraviolet rays; the controller is configured to respond to a sterilization function starting instruction, and obtain the initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in the unit space; acquiring the accumulated operation time of the indoor fan; and controlling the ultraviolet sterilization module according to the accumulated running time of the indoor fan and the initial working time. The air conditioner can achieve good sterilization effect and save cost.

Description

Air conditioner and sterilization control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a sterilization control method of the air conditioner.
Background
The ultraviolet sterilization module is arranged on the air conditioner, in the related art, the distance measurement is performed by utilizing a sensor arranged in the air conditioner so as to calculate the volume of the space where the air conditioner is positioned, and then the running time of the ultraviolet sterilization module is calculated by the wind speed and the related parameters of the ultraviolet sterilization module so as to realize the automatic control and the efficient sterilization of the ultraviolet sterilization module. However, in the above scheme, only the influence of external factors such as the space size and the wind speed on the time required by the ultraviolet sterilization module to achieve the expected sterilization effect is considered, but the influence of the air humidity on the ultraviolet radiation intensity is ignored, especially when the air humidity exceeds a certain humidity, the sterilization effect of the ultraviolet sterilization module is attenuated sharply, and at the moment, the ultraviolet sterilization module is started, so that the expected sterilization effect is not achieved, and the loss of the ultraviolet sterilization module is increased. In addition, because the sensor is required to be arranged, the production cost is increased, in addition, the influence of the cleanliness degree of the filter screen of the air conditioner on the air of the convection filter screen is ignored, when the air conditioner is accumulated and operated for a long time, a large amount of dust and microorganisms can be accumulated on the filter screen, and the microorganisms attached to part of the filter screen can be taken away by air flow through the filter screen, so that the sterilizing effect of the ultraviolet sterilizing module can not be guaranteed.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide an air conditioner, with which a good sterilization effect can be achieved and the cost can be reduced.
The second objective of the present invention is to provide a sterilization control method for an air conditioner.
In order to solve the above-mentioned problem, an embodiment of a first aspect of the present invention provides an air conditioner, including: an indoor fan and an outdoor fan; a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer; an outdoor heat exchanger and an indoor heat exchanger, one of which is a condenser and the other of which is an evaporator; the ultraviolet sterilization module is used for sterilizing the evaporator through ultraviolet rays; the controller is configured to respond to a sterilization function starting instruction, and obtain the initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in the unit space; acquiring the accumulated operation time of the indoor fan; and controlling the ultraviolet sterilization module according to the accumulated running time of the indoor fan and the initial working time.
According to the air conditioner provided by the embodiment of the invention, the ultraviolet sterilization module is arranged on the air conditioner, when the sterilization function is required, the initial working time of the ultraviolet sterilization module is obtained according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space, so that the distance measurement is not required in the space where the air conditioner is positioned, a distance measurement sensor is not required to be arranged, the cost is effectively saved, and the cleanliness of the air conditioner filter screen can influence the air of the air filter screen to a certain extent, so that the cleanliness condition of the air conditioner filter screen is determined through the accumulated operation time of the indoor fan, and the influence of the initial working time and the accumulated operation time of the indoor fan on the air sterilization is comprehensively considered when the ultraviolet sterilization module is controlled, and the sterilization effect can be effectively improved.
In some embodiments, the controller is further specifically configured to: when the accumulated operation time length of the indoor fan reaches the upper limit value of the first preset operation time length, controlling the ultraviolet sterilization module to start operation; correcting the initial working time length through a first correction coefficient to obtain a first target working time length of the ultraviolet sterilization module, wherein the first correction coefficient is larger than 1; acquiring the actual working time length of the ultraviolet sterilization module after starting operation; and when the actual working time length is determined to reach the upper limit value of the first target working time length, controlling the ultraviolet sterilization module to stop running.
In some embodiments, the controller is further specifically configured to: when the ultraviolet sterilization module is in starting operation, determining that the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value, and sending a filter screen cleaning prompt instruction, wherein the second preset operation duration upper limit value is larger than the first preset operation duration upper limit value; receiving a filter screen cleaning completion instruction, controlling zero clearing of the accumulated running time length of the indoor fan, and obtaining the latest accumulated running time length of the indoor fan after the zero clearing of the accumulated running time length; and controlling the ultraviolet sterilization module according to the latest accumulated operation time and the initial working time.
In some embodiments, the controller is further specifically configured to: and if the filter screen cleaning completion instruction is not received, controlling the ultraviolet sterilization module to continue to operate until the actual working time length of the ultraviolet sterilization module reaches the first target working time length upper limit value.
In some embodiments, the controller is further specifically configured to: determining that the accumulated operation time length of the indoor fan reaches a first preset operation time length lower limit value; acquiring the humidity state of the working environment of the ultraviolet sterilization module; and controlling the ultraviolet sterilization module according to the initial working time and the humidity state of the working environment.
In some embodiments, the controller is further specifically configured to: acquiring indoor environment temperature and evaporator coil temperature; if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is larger than a preset upper temperature limit value, determining that the working environment humidity state of the ultraviolet sterilization module is an abnormal environment humidity state; and if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is smaller than a preset temperature lower limit value, determining that the working environment humidity state of the ultraviolet sterilization module is a normal environment humidity state.
In some embodiments, the air conditioner further includes a humidity detection module, where the humidity detection module is connected to the controller and is configured to detect a humidity of a working environment in which the ultraviolet sterilization module is located; the controller is further specifically configured to: if the working environment humidity is greater than the preset humidity upper limit value, determining that the working environment humidity state of the ultraviolet sterilization module is an abnormal environment humidity state; and if the working environment humidity is smaller than the preset humidity lower limit value, determining that the working environment humidity state of the ultraviolet sterilization module is a normal environment humidity state.
In some embodiments, the controller is further specifically configured to: determining the working environment humidity state as an abnormal environment humidity state, and controlling the compressor to reduce the running frequency; controlling the ultraviolet sterilization module to start running; correcting the initial working time length through a second correction coefficient to obtain a second target working time length of the ultraviolet sterilization module, wherein the second correction coefficient is <1; acquiring the actual working time length of the ultraviolet sterilization module after starting operation; and determining that the actual working time length reaches the upper limit value of the second target working time length, and controlling the ultraviolet sterilization module to stop running.
In some embodiments, the controller is further specifically configured to: determining the humidity state of the working environment as a normal environment humidity state, and controlling the ultraviolet sterilization module to start running; acquiring the actual working time length of the ultraviolet sterilization module after starting operation; and when the actual working time length is determined to reach the upper limit value of the initial working time length, controlling the ultraviolet sterilization module to stop running.
In some embodiments, the controller, when obtaining the initial operating time of the ultraviolet sterilization module, is further specifically configured to: the initial operating time is obtained by the following formula:
T 0 ＝P*T s
wherein ,T0 For the initial working time, P is the refrigerating capacity of the air conditioner, T s For the effective sterilization period.
An embodiment of a second aspect of the present invention provides a sterilization control method for an air conditioner, where the air conditioner includes an ultraviolet sterilization module, and the sterilization control method includes: responding to a sterilization function starting instruction, and obtaining initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space; acquiring the accumulated operation time of the indoor fan; and controlling the ultraviolet sterilization module according to the accumulated running time of the indoor fan and the initial working time.
According to the sterilization control method of the air conditioner, the ultraviolet sterilization module is arranged on the air conditioner, when the sterilization function is required, the initial working time of the ultraviolet sterilization module is obtained according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space, so that the distance measurement is not needed in the space where the air conditioner is located, a distance measurement sensor is not needed, the cost is effectively saved, and the cleaning condition of the air conditioner filter screen is determined according to the accumulated operation time of the indoor fan because the cleaning degree of the air conditioner filter screen can influence the air of the filter screen, and the influence of the cleaning degree of the filter screen on the air sterilization can be avoided and the sterilization effect can be effectively improved by comprehensively considering the initial working time and the accumulated operation time of the indoor fan when the ultraviolet sterilization module is controlled.
In some embodiments, controlling the ultraviolet sterilization module according to the accumulated operation duration and the initial operation duration of the indoor fan includes: when the accumulated operation time length of the indoor fan reaches the upper limit value of the first preset operation time length, controlling the ultraviolet sterilization module to start operation; correcting the initial working time length through a first correction coefficient to obtain a first target working time length of the ultraviolet sterilization module, wherein the first correction coefficient is larger than 1; acquiring the actual working time length of the ultraviolet sterilization module after starting operation; and when the actual working time length is determined to reach the upper limit value of the first target working time length, controlling the ultraviolet sterilization module to stop running.
In some embodiments, the sterilization control method further comprises: when the ultraviolet sterilization module is in starting operation, determining that the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value, and sending a filter screen cleaning prompt instruction, wherein the second preset operation duration upper limit value is larger than the first preset operation duration upper limit value; receiving a filter screen cleaning completion instruction, controlling zero clearing of the accumulated running time length of the indoor fan, and obtaining the latest accumulated running time length of the indoor fan after the zero clearing of the accumulated running time length; and controlling the ultraviolet sterilization module according to the latest accumulated operation time and the initial working time.
In some embodiments, controlling the ultraviolet sterilization module according to the accumulated operation duration and the initial operation duration of the indoor fan includes: determining that the accumulated operation time length of the indoor fan reaches a first preset operation time length lower limit value; acquiring the humidity state of the working environment of the ultraviolet sterilization module; and controlling the ultraviolet sterilization module according to the initial working time and the humidity state of the working environment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a perspective view of an external appearance of an air conditioner according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an outline of a structure of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a structure of a control system of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a structure of an outdoor control apparatus of an air conditioner according to one embodiment of the present invention;
fig. 5 is a schematic block diagram of a structure of an indoor control device of an air conditioner according to an embodiment of the present invention;
fig. 6 is a cross-sectional view of an indoor unit according to one embodiment of the present invention;
fig. 7 is a block diagram of an air conditioner according to an embodiment of the present invention;
fig. 8 is a block diagram of an air conditioner according to another embodiment of the present invention;
fig. 9 is a flowchart of a sterilization control method according to an embodiment of the present invention;
fig. 10 is a flowchart of a sterilization control method according to another embodiment of the present invention.
Reference numerals:
1: an air conditioner; 2: an outdoor unit; 3: an indoor unit; 4: connecting a piping; a remote control 5.
10: a refrigerant circulation circuit; 11: a compressor; 13: an outdoor heat exchanger; 14: an expansion valve; 15: a reservoir; 16: an indoor heat exchanger; 17: an ultraviolet sterilization module; 18: a humidity detection module; 21: an outdoor fan; 26: an outdoor control device; 31: an indoor fan; 35: an indoor control device; 50: and a controller.
16b: a heat transfer tube; 21a: an outdoor fan motor; 31a: an indoor fan motor.
Detailed Description
Embodiments of the present application will be described in detail below, by way of example with reference to the accompanying drawings.
The air conditioner of the present application performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
The air conditioner 1 shown in fig. 1 includes: the indoor unit 3 is, for example, an indoor unit (shown in the figure), and the indoor unit is usually mounted on an indoor wall surface WL or the like. For another example, an indoor unit (not shown) is also an indoor unit mode.
The outdoor unit 2 is usually installed outdoors and is used for heat exchange in an indoor environment. In fig. 1, the outdoor unit 2 is located outdoors on the opposite side of the indoor unit 3 across the wall surface WL, and the outdoor unit 2 is indicated by a broken line.
Fig. 2 shows a circuit configuration of an air conditioner 1, and the air conditioner 1 includes a refrigerant circulation circuit 10, and is capable of performing a vapor compression refrigeration cycle by circulating a refrigerant in the refrigerant circulation circuit 10. The indoor unit 3 and the outdoor unit 2 are connected to each other by a connection pipe 4 to form a refrigerant circulation circuit 10 through which a refrigerant circulates.
Further, as shown in fig. 3, the air conditioner 1 is provided with a controller 50 to control operations of respective components in the air conditioner inside so that the respective components of the air conditioner 1 operate to realize respective predetermined functions of the air conditioner. As shown in fig. 1, a remote controller 5 is attached to the air conditioner 1, and the remote controller 5 has a function of communicating with the controller 50 using, for example, infrared rays or other communication means. The remote controller 5 is used for various controls of the air conditioner by a user, and interaction between the user and the air conditioner is realized.
As shown in fig. 2, the refrigerant circuit 10 includes a compressor 11, an outdoor heat exchanger 13, an expansion valve 14, a receiver 15, and an indoor heat exchanger 16. The indoor heat exchanger 16 and the outdoor heat exchanger 13 are used as condensers or evaporators, that is, one of them is operated as a condenser and the other is operated as an evaporator. The compressor 11 sucks in refrigerant from the suction port, and discharges the refrigerant compressed therein to the indoor heat exchanger 16 from the discharge port. The compressor 11 is an inverter compressor of variable capacity that performs rotational speed control based on an inverter.
The outdoor heat exchanger 13 has a first inlet and outlet for passing the refrigerant between the outdoor heat exchanger and the suction port of the compressor 11 via the accumulator 15, and has a second inlet and outlet for passing the refrigerant between the outdoor heat exchanger and the expansion valve 14. The outdoor heat exchanger 13 exchanges heat between the outdoor air and the refrigerant flowing through a heat transfer tube (not shown) connected between the second inlet and the first inlet of the outdoor heat exchanger 13.
The expansion valve 14 is disposed between the outdoor heat exchanger 13 and the indoor heat exchanger 16. The expansion valve 14 has a function of expanding and decompressing the refrigerant flowing between the outdoor heat exchanger 13 and the indoor heat exchanger 16. The expansion valve 14 is configured to be capable of changing the opening degree, and the opening degree is reduced to increase the flow resistance of the refrigerant passing through the expansion valve 14, and the opening degree is increased to decrease the flow resistance of the refrigerant passing through the expansion valve 14. The expansion valve 14 expands and decompresses the refrigerant flowing from the indoor heat exchanger 16 to the outdoor heat exchanger 13 during the heating operation. Further, even if the state of other devices mounted in the refrigerant circulation circuit 10 is not changed, when the opening degree of the expansion valve 14 is changed, the flow rate of the refrigerant flowing in the refrigerant circulation circuit 10 is changed.
The indoor heat exchanger 16 has a second inlet and outlet for allowing the liquid refrigerant to flow between the expansion valve 14 and a first inlet and outlet for allowing the gas refrigerant to flow between the gas refrigerant and the discharge port of the compressor 11. The indoor heat exchanger 16 exchanges heat between the indoor air and the refrigerant flowing through a heat transfer tube 16b (see fig. 6) connected between the second inlet and the first inlet of the indoor heat exchanger 16.
A receiver 15 is disposed between the outdoor heat exchanger 13 and the suction port of the compressor 11. In the accumulator 15, the refrigerant flowing from the outdoor heat exchanger 13 to the compressor 11 is separated into a gas refrigerant and a liquid refrigerant. The gas refrigerant is mainly supplied from the accumulator 15 to the suction port of the compressor 11.
The outdoor unit 2 further includes an outdoor fan 21, and the outdoor fan 21 generates an airflow of the outdoor air passing through the outdoor heat exchanger 13 to promote heat exchange between the refrigerant flowing through the heat transfer tubes and the outdoor air. The outdoor fan 21 is driven by an outdoor fan motor 21a capable of changing the rotational speed. The indoor unit 3 further includes an indoor fan 31, and the indoor fan 31 generates an airflow of the indoor air passing through the indoor heat exchanger 16 to promote heat exchange between the indoor air and the refrigerant flowing through the heat transfer pipe 16 b. The indoor fan 31 is driven by an indoor fan motor 31a capable of changing the rotational speed.
As shown in fig. 3 to 5, the controller 50 includes an outdoor control device 26 incorporated in the outdoor unit 2 and an indoor control device 35 incorporated in the indoor unit 3. The outdoor control device 26 and the indoor control device 35 are connected to each other by a signal line, and can transmit and receive signals to and from each other.
As shown in fig. 4, the outdoor control device 26 of the outdoor unit 2 controls the compressor 11, the expansion valve 14, the outdoor fan 21, and the like.
Referring to fig. 7, fig. 7 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, where the air conditioner further includes: the ultraviolet sterilization module is arranged on the indoor side and is used for sterilizing the evaporator through ultraviolet rays; for example, the ultraviolet sterilization module eliminates various bacteria, fungi, viruses and other microorganisms flowing through the air through the UVC ultraviolet sterilization lamp, so that the air conditioner improves the indoor air quality and meets the health requirements of users by arranging the ultraviolet sterilization module.
And, the controller 50 is configured to control the ultraviolet sterilization module by the following operations.
The controller 50 obtains an initial operating time of the ultraviolet sterilization module according to a cooling capacity of the air conditioner and an effective sterilization time of the ultraviolet sterilization module in the unit space in response to the sterilization function start command.
The number of the air conditioners which are matched with the different room areas can be selected, and the refrigerating capacity of the air conditioners is fixed after the number of the air conditioners is determined, so that the refrigerating capacity of the air conditioners is a fixed attribute parameter of the air conditioners, the air conditioners cannot be changed due to external factors, and the working environment area of the air conditioners can be known after the refrigerating capacity of the air conditioners is determined.
The effective sterilization duration is the operation duration required by the sterilization rate of the ultraviolet sterilization module in the unit space to reach a certain sterilization effect, namely under the condition of operating the effective sterilization duration, the ultraviolet sterilization module can effectively enable the sterilization effect of the air in the unit space to meet the expected requirement, for example, the effective sterilization duration can be set to be the duration required by the sterilization rate of the ultraviolet sterilization module in the unit space to reach more than 70%.
In an embodiment, for a sterilization function starting instruction, a user may send the sterilization function starting instruction to the air conditioner through a remote controller, an Application (APP) of the air conditioner in the mobile terminal or a control panel on the body of the air conditioner in an operation mode such as language, gesture, etc. so as to trigger the sterilization function of the air conditioner, so as to clean and sterilize air blown out by the air conditioner, and improve the intelligence of the air conditioner.
In the embodiment, the size of the working environment area of the air conditioner can be determined based on the refrigerating capacity of the air conditioner, and the initial working time length of the ultraviolet sterilization module is obtained by utilizing the pre-stored fixed parameters of the air conditioner, namely the refrigerating capacity and the effective sterilization time length, and is recorded as T for example 0 Therefore, the distance measurement is not required in the space where the air conditioner is located, and a distance measurement sensor is not required to be arranged, so that the cost is effectively saved.
The controller 50 also obtains the accumulated operating time of the indoor fan.
The accumulated operation time can be understood as the total time of the indoor fan after starting operation.
The method includes the steps of recording operation duration after each start of the indoor fan, accumulating the operation duration each time, wherein an accumulated result is the accumulated operation duration of the indoor fan, storing the calculated accumulated operation duration into an indoor control device of the indoor unit, and acquiring the accumulated operation duration of the indoor fan stored by the indoor control device by a controller.
The controller 50 controls the ultraviolet sterilization module according to the accumulated operation time length and the initial operation time length of the indoor fan.
In the embodiment, as the accumulated operation time length of the indoor fan of the air conditioner is increased, a large amount of microorganisms and dust can be accumulated on the filter screen of the air conditioner, when the ultraviolet sterilization module is used for sterilizing air, the air flow can take away part of microorganisms attached to the filter screen through the filter screen, so that the application can judge the cleaning condition of the filter screen of the air conditioner on the basis of the initial operation time length of the ultraviolet sterilization module, namely, the initial operation time length and the accumulated operation time length of the indoor fan are comprehensively considered when the ultraviolet sterilization module is controlled, thereby avoiding the influence of the cleaning degree of the filter screen on the air sterilization, and particularly, when the cleaning condition of the filter screen of the air conditioner is determined to be worse according to the accumulated operation time length, the operation time length of the sterilization of the ultraviolet sterilization module can be prolonged on the basis of the initial operation time length, and the sterilization effect is effectively improved.
According to the air conditioner provided by the embodiment of the invention, the ultraviolet sterilization module is arranged on the air conditioner, when the sterilization function is required, the initial working time of the ultraviolet sterilization module is obtained according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space, so that the distance measurement is not required in the space where the air conditioner is positioned, a distance measurement sensor is not required to be arranged, the cost is effectively saved, and the cleanliness of the air conditioner filter screen can influence the air of the air filter screen to a certain extent, so that the cleanliness condition of the air conditioner filter screen is determined through the accumulated operation time of the indoor fan, and the influence of the initial working time and the accumulated operation time of the indoor fan on the air sterilization is comprehensively considered when the ultraviolet sterilization module is controlled, and the sterilization effect can be effectively improved.
In some embodiments, the controller controls the ultraviolet sterilization module to start operating when determining that the accumulated operating time of the indoor fan reaches the first preset operating time upper limit value.
The first preset operation time is a time set based on experience, which is not limited, for example, the first preset operation time may be set to 200 hours, and the controller determines the accumulated operation time T of the indoor fan fan Up to 200The upper limit of h, T fan And when the time is more than or equal to 200 hours, starting the ultraviolet sterilization module to perform ultraviolet sterilization.
When the accumulated running time of the indoor fan reaches the first preset running time upper limit value, the accumulated running time of the indoor fan is longer, and microorganisms and dust are accumulated on a filter screen of the air conditioner too much, so that in order to reduce the influence of the cleanliness of the filter screen on air sterilization, the controller corrects the initial working time by a first correction coefficient to obtain a first target working time of the ultraviolet sterilization module, wherein the first correction coefficient is more than 1, that is, on the basis of the initial working time, the controller properly prolongs the sterilization time of the ultraviolet sterilization module by the first correction coefficient so as to improve the sterilization effect and ensure the cleanliness of air blown out by the air conditioner.
The first correction coefficient is a coefficient set based on a large amount of test data, and the value range of the first correction coefficient is (1, 2), for example, the first correction coefficient may be 1.2, 1.5 or 2.
The first target operation duration t1=the first correction coefficient is the initial operation duration.
And when the ultraviolet sterilization module is started, the time timer synchronously starts to count so as to record the continuous working time after the ultraviolet sterilization module is started and operated, namely the actual working time T after the ultraviolet sterilization module is started and operated uvc 。
Further, the controller determines the actual operating time period T uvc Reaching the upper limit value of the first target working time length, namely T uvc And when the temperature is not less than T1, the ultraviolet sterilization module is controlled to stop running, the sterilization function is closed, the air conditioner is restored to the original running state, so that the ultraviolet sterilization module completes the ultraviolet sterilization function, and the purposes of automatic control and efficient sterilization of the ultraviolet sterilization module are realized.
In addition, in the starting operation process of the ultraviolet sterilization module, if the accumulated operation time length of the indoor fan is determined to reach the second preset operation time length upper limit value, wherein the second preset operation time length upper limit value is larger than the first preset operation time length upper limit value, the fact that too many attachments are attached to the filter screen of the air conditioner at the moment is indicated, the sterilization effect is seriously influenced because the air cannot be improved in a mode of prolonging the sterilization time length of the ultraviolet sterilization module is provided, and therefore the controller actively sends a filter screen cleaning prompt instruction to remind a user to unpick and wash the filter screen, and the influence of the cleaning degree of the filter screen on air sterilization is avoided.
The second preset operation duration upper limit value is a duration set based on experience, which is not limited, for example, the second preset operation duration can be set to 360 hours, and the controller determines the accumulated operation duration T of the indoor fan fan Up to an upper limit of 360h, i.e. T fan And when the time is more than or equal to 360 hours, sending a filter screen cleaning prompt instruction so as to remind a user to actively clean or replace the filter screen.
The controller determines whether the filter screen needs to be cleaned by determining whether the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value when the ultraviolet sterilization module is in the starting operation. When the accumulated running time of the indoor fan reaches the first preset running time upper limit value but does not reach the second preset running time upper limit value, the mode of prolonging the sterilizing time of the ultraviolet sterilizing module is explained to improve air at the moment, a user does not need to clean a filter screen, and the controller controls the ultraviolet sterilizing module to run for a first target working time so as to achieve a sterilizing function and meet air quality health requirements. When the accumulated running time of the indoor fan reaches the second preset running time upper limit value, the fact that microorganisms and dust accumulated by the filter screen are too much is indicated, the sterilizing effect cannot be guaranteed by prolonging the running time of the ultraviolet sterilizing module, and therefore the controller actively sends a filter screen cleaning prompt instruction to automatically start the filter screen cleaning prompt function, and a user is conveniently reminded of cleaning the filter screen.
Furthermore, after the filter screen is replaced, a user needs to manually push a button to clean a filter screen cleaning prompt instruction, after the filter screen cleaning prompt instruction is cleaned, the controller can receive a filter screen cleaning completion instruction, control the accumulated running time of the indoor fan to be cleared, acquire the latest accumulated running time of the indoor fan after the accumulated running time is cleared, that is, after the accumulated running time of the indoor fan is cleared, start to record the accumulated running time of the indoor fan again, and take the re-recorded data as the latest accumulated running time of the indoor fan.
And the controller controls the ultraviolet sterilization module according to the latest accumulated operation time and the initial operation time, specifically, after the filter screen is replaced, the cleanliness of the filter screen is higher, so that the cleanliness of the filter screen is judged again according to the latest accumulated operation time of the indoor fan, the initial operation time is corrected based on the judged cleanliness of the filter screen, the target operation time of the ultraviolet sterilization module under the condition is determined again, when the actual operation time of the ultraviolet sterilization module reaches the re-determined target operation time, the ultraviolet sterilization module is controlled to stop operation, and the sterilization function is finished, thereby reducing the loss of the ultraviolet sterilization module and prolonging the service life of the ultraviolet sterilization module.
In addition, if the controller does not receive the filter screen cleaning completion instruction, the ultraviolet sterilization module is controlled to continue to operate until the actual working time length of the ultraviolet sterilization module reaches the upper limit value of the first target working time length, the ultraviolet sterilization module is controlled to stop operating, the sterilization function is closed, and the air conditioner is restored to the original operating state. Therefore, even if a user does not clean the filter screen in time, the filter screen is considered to be lower in cleanliness, and the sterilization operation time of the ultraviolet sterilization module is prolonged to ensure a good sterilization effect.
It will be appreciated that if the user does not replace the filter screen or does not manually push a button to clear the filter screen cleaning prompt, the filter screen cleaning prompt will always be present, and the controller will not always receive the filter screen cleaning completion command.
In some embodiments, the controller determines an accumulated operating time period T of the indoor fan fan Reaching the lower limit value of the first preset operation time length, namely T fan The first preset operation time length is less than or equal to. For example, if the first preset operation duration is 200h, the accumulated operation duration T of the indoor fan fan When reaching the first preset operation time lower limit value, the method can be recorded as T fan ≤200h。
Furthermore, in this case, the filter screen of the air conditioner has fewer attachments, and the ultraviolet sterilization module is considered to be influenced by the high humidity environment, so that the ultraviolet radiation intensity is weakened and the sterilization effect is poor.
Therefore, the controller controls the ultraviolet sterilization module according to the initial working time length and the working environment humidity state, so that the influence of air humidity on ultraviolet radiation intensity is reduced, the loss of the ultraviolet sterilization module is reduced, and the service life of the ultraviolet sterilization module is prolonged.
In some embodiments, for obtaining the humidity state of the working environment of the ultraviolet sterilization module, the indoor environment temperature T can be obtained Ring(s) And evaporator coil temperature T Coiled pipe And calculates the temperature difference Δt between the indoor ambient temperature and the evaporator coil temperature, as can be expressed as Δt=t Ring(s) －T Coiled pipe Judging the working environment humidity state of the ultraviolet sterilization module by using the calculated temperature difference, specifically, if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is greater than a preset temperature upper limit value, determining that the working environment humidity state of the ultraviolet sterilization module is an abnormal environment humidity state, wherein the abnormal environment humidity state can be understood as a state that the humidity of the current working environment can influence the sterilization effect of the ultraviolet sterilization module; if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is smaller than the preset temperature lower limit value, the working environment humidity state of the ultraviolet sterilization module is determined to be a normal environment humidity state, wherein the normal environment humidity state can be understood as a state that the humidity of the current working environment cannot influence the sterilization effect of the ultraviolet sterilization module.
The indoor environment temperature can be detected through a temperature sensor arranged on an indoor unit of the air conditioner and is sent to a controller of the air conditioner, or other indoor equipment capable of acquiring the indoor environment temperature sends the detected indoor environment temperature to the controller of the air conditioner through a communication module. The evaporator coil temperature is sensed by providing a corresponding temperature sensor and transmitting the sensed evaporator coil temperature to a controller of the air conditioner.
The preset temperature is a temperature value preset according to experience, and is not limited thereto, for example, the preset temperature may be set to 10 ℃.
For example, taking the preset temperature as 10 ℃ as an example, if the controller determines that the temperature difference delta T between the indoor environment temperature and the temperature of the evaporator coil is greater than the preset upper temperature limit value, namely delta T is greater than or equal to 10 ℃, the temperature difference is greater, the environment humidity near the ultraviolet sterilization module is greater, namely the working environment humidity state of the ultraviolet sterilization module is determined to be an abnormal environment humidity state; or the controller determines that the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is smaller than the lower limit value of the preset temperature, namely delta T is less than or equal to 10 ℃, and the temperature difference indicates that the humidity near the ultraviolet sterilization module cannot influence the sterilization effect, namely the working environment humidity state of the ultraviolet sterilization module is determined to be the normal environment humidity state.
Or, the humidity detection module can be connected with the controller by arranging the humidity detection module on the air conditioner so as to be used for detecting the humidity of the working environment where the ultraviolet sterilization module is located.
If the controller determines that the working environment humidity is greater than the preset humidity upper limit value, the controller indicates that the working environment humidity near the ultraviolet sterilization module is greater, and the sterilization effect is affected, namely, the working environment humidity state of the ultraviolet sterilization module is determined to be an abnormal environment humidity state. Or if the controller determines that the working environment humidity is smaller than the preset humidity lower limit value, the controller indicates that the working environment humidity near the ultraviolet sterilization module cannot influence the sterilization effect, and determines that the working environment humidity state of the ultraviolet sterilization module is a normal environment humidity state.
The preset humidity is a humidity value preset empirically, and is not limited thereto, for example, the preset humidity may be set to 60%.
For example, taking the preset humidity as 60% as an example, if the controller determines that the working environment humidity Rh is greater than the preset humidity upper limit value, that is, rh is greater than or equal to 60%, it is indicated that the environment humidity near the ultraviolet sterilization module is greater, that is, the working environment humidity state of the ultraviolet sterilization module is determined to be an abnormal environment humidity state; or, the controller determines that the working environment humidity Rh is smaller than the preset humidity lower limit value, namely Rh is smaller than or equal to 60%, and then the controller indicates that the humidity near the ultraviolet sterilization module cannot influence the sterilization effect, namely determines that the working environment humidity state of the ultraviolet sterilization module is the normal environment humidity state.
In some embodiments, controlling the ultraviolet sterilization module according to the initial operating time period and the operating environment humidity state is achieved as follows.
The controller determines that the humidity state of the working environment is an abnormal environment humidity state, and indicates that the air humidity near the ultraviolet sterilization module is high, and in order to reduce the influence of the air humidity on the ultraviolet radiation intensity, the compressor is controlled to reduce the running frequency so as to reduce the moisture condensation and the temperature difference, so that the sterilization effect of the ultraviolet sterilization module is ensured.
Meanwhile, the ultraviolet sterilization module is controlled to start to operate, at the moment, due to the fact that the cleanliness of the filter screen is high, the initial working time length is corrected through the second correction coefficient to obtain the second target working time length of the ultraviolet sterilization module while the operating frequency of the compressor is reduced to reduce air humidity, wherein the second correction coefficient is smaller than 1, namely the sterilization time length of the ultraviolet sterilization module is shortened, service life loss of the ultraviolet sterilization module is reduced, and the problem that comfort level is reduced due to the fact that refrigerating/heating effects are weakened due to long-time frequency-reducing operation of the compressor can be avoided.
The second correction coefficient is a coefficient set based on a large amount of test data, and may be set to 0.8, for example.
The second target operating period t2=second correction coefficient is an initial operating period.
In addition, when the ultraviolet sterilization module is started to operate, the time timer is synchronously started to count so as to record the continuous working time after the ultraviolet sterilization module is started to operate, namely the actual working time T after the ultraviolet sterilization module is started to operate uvc 。
Further, the controller determines the actual operating time period T uvc Reaching the upper limit value of the second target working time length, namely T uvc When the temperature is not less than T2, the ultraviolet sterilization module is controlled to stop running, the sterilization function is closed, the air conditioner is restored to the original running state, and the ultraviolet sterilization module finishes the ultraviolet sterilization function so far, so that the air conditioner is in factThe automatic control and high-efficiency sterilization of the ultraviolet sterilization module are realized.
Or the controller determines that the working environment humidity state is the normal environment humidity state, and then the air humidity near the ultraviolet sterilization module is not influenced by the ultraviolet radiation intensity, so that the frequency reduction of the compressor is not required to be controlled, the controller directly controls the ultraviolet sterilization module to start to operate, and the actual working time length after the ultraviolet sterilization module starts to operate is obtained.
Wherein, because the filter screen cleanliness is higher and the temperature is suitable under this condition, consequently need not to prolong or shorten ultraviolet sterilization module's sterilization duration, ultraviolet sterilization module operation initial operating duration can realize better bactericidal effect promptly, guarantees the cleanliness factor of air conditioner blowout air to the controller is determining actual operating duration T uvc Up to the upper limit of the initial working time, namely T uvc ≥T 0 And when the air conditioner is in the original running state, the ultraviolet sterilization module is controlled to stop running, the sterilization function is closed, and the air conditioner is restored to the original running state.
In some embodiments, the controller, when obtaining the initial operating time of the ultraviolet sterilization module, is further specifically configured to: the initial operating time is obtained by the following formula:
T 0 ＝P*T s
wherein ,T0 For the initial working time, P is the refrigerating capacity of the air conditioner, T s Is effective sterilization time.
In addition, it should be noted that, in the operation process of the ultraviolet sterilization module, if the controller receives an instruction for closing the ultraviolet sterilization module, the controller controls the ultraviolet sterilization module to stop operating, and meanwhile, the actual operation duration of the ultraviolet sterilization module is cleared.
An embodiment of the second aspect of the present invention provides a sterilization control method for an air conditioner, as shown in fig. 9, where the air conditioner includes an ultraviolet sterilization module, and the sterilization control method includes:
step S1, responding to a sterilization function starting instruction, and obtaining the initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in the unit space.
In an embodiment, for a sterilization function starting instruction, a user may send the sterilization function starting instruction to the air conditioner through a remote controller, an Application (APP) of the air conditioner in the mobile terminal or a control panel on the body of the air conditioner in an operation mode such as language, gesture, etc. so as to trigger the sterilization function of the air conditioner, so as to clean and sterilize air blown out by the air conditioner, and improve the intelligence of the air conditioner.
In the embodiment, the size of the working environment area of the air conditioner can be determined based on the refrigerating capacity of the air conditioner, and the initial working time length of the ultraviolet sterilization module is obtained by utilizing the pre-stored fixed parameters of the air conditioner, namely the refrigerating capacity and the effective sterilization time length, and is recorded as T for example 0 Therefore, the distance measurement is not required in the space where the air conditioner is located, and a distance measurement sensor is not required to be arranged, so that the cost is effectively saved.
And S2, acquiring the accumulated running time of the indoor fan. The method includes the steps of recording operation duration after each start of the indoor fan, accumulating the operation duration each time, wherein an accumulated result is the accumulated operation duration of the indoor fan, storing the calculated accumulated operation duration into an indoor control device of the indoor unit, and acquiring the accumulated operation duration of the indoor fan stored by the indoor control device by a controller.
And step S3, controlling the ultraviolet sterilization module according to the accumulated running time and the initial working time of the indoor fan.
In the embodiment, as the accumulated operation time length of the indoor fan of the air conditioner is increased, a large amount of microorganisms and dust can be accumulated on the filter screen of the air conditioner, when the ultraviolet sterilization module is used for sterilizing air, the air flow can take away part of microorganisms attached to the filter screen through the filter screen, so that the application can judge the cleaning condition of the filter screen of the air conditioner on the basis of the initial operation time length of the ultraviolet sterilization module, namely, the initial operation time length and the accumulated operation time length of the indoor fan are comprehensively considered when the ultraviolet sterilization module is controlled, thereby avoiding the influence of the cleaning degree of the filter screen on the air sterilization, and particularly, when the cleaning condition of the filter screen of the air conditioner is determined to be worse according to the accumulated operation time length, the operation time length of the sterilization of the ultraviolet sterilization module can be prolonged on the basis of the initial operation time length, and the sterilization effect is effectively improved.
According to the sterilization control method of the air conditioner, the ultraviolet sterilization module is arranged on the air conditioner, when the sterilization function is required, the initial working time of the ultraviolet sterilization module is obtained according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space, so that the distance measurement is not needed in the space where the air conditioner is located, a distance measurement sensor is not needed, the cost is effectively saved, and the cleaning condition of the air conditioner filter screen is determined according to the accumulated operation time of the indoor fan because the cleaning degree of the air conditioner filter screen can influence the air of the filter screen, and the influence of the cleaning degree of the filter screen on the air sterilization can be avoided and the sterilization effect can be effectively improved by comprehensively considering the initial working time and the accumulated operation time of the indoor fan when the ultraviolet sterilization module is controlled.
In some embodiments, when the accumulated operation time length of the indoor fan reaches the first preset operation time length upper limit value, the ultraviolet sterilization module is controlled to start operation. Furthermore, when the accumulated running time of the indoor fan reaches the first preset running time upper limit value, the accumulated running time of the indoor fan is longer, and microorganisms and dust on a filter screen of the air conditioner accumulate too much, so that in order to reduce the influence of the cleanliness of the filter screen on air sterilization, the initial working time is corrected by a first correction coefficient to obtain a first target working time of the ultraviolet sterilization module, wherein the first correction coefficient is more than 1, that is, on the basis of the initial working time, the controller properly prolongs the sterilization time of the ultraviolet sterilization module by the first correction coefficient so as to improve the sterilization effect and ensure the cleanliness of air blown out by the air conditioner.
The first target working time period t1=the first correction coefficient is the initial working time period.
And, when the ultraviolet sterilization module is started, the time meterThe timer starts timing synchronously to record the continuous working time after the ultraviolet sterilization module starts to operate, namely the actual working time T after the ultraviolet sterilization module starts to operate uvc . And further, when the actual working time length is determined to reach the upper limit value of the first target working time length, controlling the ultraviolet sterilization module to stop running.
Specifically, the controller determines that the actual working time reaches the upper limit value of the first target working time, namely T uvc And when the temperature is not less than T1, the ultraviolet sterilization module is controlled to stop running, the sterilization function is closed, the air conditioner is restored to the original running state, so that the ultraviolet sterilization module completes the ultraviolet sterilization function, and the purposes of automatic control and efficient sterilization of the ultraviolet sterilization module are realized.
In addition, in the starting operation process of the ultraviolet sterilization module, if the accumulated operation time length of the indoor fan is determined to reach the second preset operation time length upper limit value, wherein the second preset operation time length upper limit value is larger than the first preset operation time length upper limit value, the fact that too many attachments are attached to the filter screen of the air conditioner at the moment is indicated, the sterilization effect is seriously influenced because the air cannot be improved in a mode of prolonging the sterilization time length of the ultraviolet sterilization module is provided, and therefore the controller actively sends a filter screen cleaning prompt instruction to remind a user to unpick and wash the filter screen, and the influence of the cleaning degree of the filter screen on air sterilization is avoided.
The controller determines whether the filter screen needs to be cleaned by determining whether the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value when the ultraviolet sterilization module is in the starting operation. When the accumulated running time of the indoor fan reaches the first preset running time upper limit value but does not reach the second preset running time upper limit value, the mode of prolonging the sterilizing time of the ultraviolet sterilizing module is explained to improve air at the moment, a user does not need to clean a filter screen, and the controller controls the ultraviolet sterilizing module to run for a first target working time so as to achieve a sterilizing function and meet air quality health requirements. When the accumulated running time of the indoor fan reaches the second preset running time upper limit value, the fact that microorganisms and dust accumulated by the filter screen are too much is indicated, the sterilizing effect cannot be guaranteed by prolonging the running time of the ultraviolet sterilizing module, and therefore the controller actively sends a filter screen cleaning prompt instruction to automatically start the filter screen cleaning prompt function, and a user is conveniently reminded of cleaning the filter screen.
Furthermore, after the filter screen is replaced, a user needs to manually push a button to clean a filter screen cleaning prompt instruction, after the filter screen cleaning prompt instruction is cleaned, the controller can receive a filter screen cleaning completion instruction, control the accumulated running time of the indoor fan to be cleared, acquire the latest accumulated running time of the indoor fan after the accumulated running time is cleared, that is, after the accumulated running time of the indoor fan is cleared, start to record the accumulated running time of the indoor fan again, and take the re-recorded data as the latest accumulated running time of the indoor fan.
And then, the ultraviolet sterilization module is controlled according to the latest accumulated operation time length and the initial operation time length, specifically, after the filter screen is replaced, the cleanliness is higher, so that the cleanliness of the filter screen is judged again according to the latest accumulated operation time length of the indoor fan, the initial operation time length is corrected based on the judged cleanliness of the filter screen, the target operation time length of the ultraviolet sterilization module under the condition is determined again, when the actual operation time length of the ultraviolet sterilization module reaches the re-determined target operation time length, the ultraviolet sterilization module is controlled to stop operation, and the sterilization function is finished, so that the loss of the ultraviolet sterilization module can be reduced, and the service life of the ultraviolet sterilization module is prolonged.
In addition, if the controller does not receive the filter screen cleaning completion instruction, the ultraviolet sterilization module is controlled to continue to operate until the actual working time length of the ultraviolet sterilization module reaches the upper limit value of the first target working time length, the ultraviolet sterilization module is controlled to stop operating, the sterilization function is closed, and the air conditioner is restored to the original operating state. Therefore, even if a user does not clean the filter screen in time, the filter screen is considered to be lower in cleanliness, and the sterilization operation time of the ultraviolet sterilization module is prolonged to ensure a good sterilization effect.
In some embodiments, when the controller determines the accumulated operating time period T of the indoor fan fan Reaching the lower limit value of the first preset operation time length, namely T fan When the first preset operation time is less than or equal to the first preset operation time, the air conditionerThe filter screen has less attachments, and meanwhile, the ultraviolet sterilization module is considered to be influenced by a high-humidity environment, the ultraviolet radiation intensity is weakened, and the sterilization effect is poor.
Therefore, the ultraviolet sterilization module is controlled according to the initial working time length and the working environment humidity state, so that the influence of air humidity on ultraviolet radiation intensity is reduced, the loss of the ultraviolet sterilization module is reduced, and the service life of the ultraviolet sterilization module is prolonged.
The sterilization control method of the air conditioner according to the embodiment of the present invention is illustrated with reference to fig. 10, and the following details are given.
And S4, the air conditioner keeps in an operating state.
And S5, judging whether the sterilization function is started, namely whether a sterilization function starting instruction is received.
Step S6, the controller reads the refrigerating capacity P of the preset air conditioner stored in the memory in the indoor control device to estimate the volume of the space where the air conditioner is located, and determines the initial operation duration T of the ultraviolet sterilization module according to the effective sterilization duration Ts of the ultraviolet sterilization module 0, wherein ,T0 ＝P*T s 。
Step S7, the controller judges the accumulated running time T of the indoor fan fan 。
Step S8, if the accumulated running time T of the indoor fan fan And (3) if the time is more than or equal to 200 hours, executing the step S9.
And S9, the controller controls the ultraviolet sterilization module to start running.
Step S10, the controller controls the ultraviolet sterilization module to start a timer to start accumulating the actual working time.
Step S11, judging the accumulated running time T of the indoor fan fan Whether the time is more than or equal to 360 hours. If yes, step S12 is executed, otherwise step S15 is executed.
Step S12, the air conditioner sends a filter screen cleaning prompt instruction.
Step S13, judging whether a filter screen cleaning completion instruction is received. If so, step S14 is performed, otherwise step S15 is performed.
And S14, the controller controls the accumulated running time of the indoor fan to be cleared, and the step S7 is executed.
Step S15, judging whether the actual working time is the first target working time upper limit, namely T uvc ≥T 0 *1.2. If yes, step S16 is executed, otherwise step S10 is executed.
And S16, the controller controls the ultraviolet sterilization module to stop running, closes the sterilization function and returns to execute the step S4.
Step S17, if the accumulated running time T of the indoor fan fan And (5) if the time is less than or equal to 200 hours, executing the step S18.
In step S18, the controller obtains the indoor ambient temperature and the evaporator coil temperature.
Step S19, the temperature difference Δt between the indoor environment temperature and the evaporator coil temperature is stored in the memory of the indoor control device.
And step S20, judging whether the delta T is more than or equal to 10 ℃. If yes, step S21 is executed, and if no, step S24 is executed.
And S21, the controller controls the compressor to reduce the operation frequency and controls the ultraviolet sterilization module to start operation.
In step S22, the controller controls the ultraviolet sterilization module to start a timer to accumulate the actual working time.
Step S23, judging whether the actual working time reaches the upper limit value of the second target working time, namely judging whether T is uvc ≥T 0 *0.8. If yes, step S16 is executed, otherwise step S22 is executed.
And S24, the controller controls the ultraviolet sterilization module to start running.
In step S25, the controller controls the ultraviolet sterilization module to start a timer to accumulate the actual working time.
Step S26, judging whether the actual working time length reaches the upper limit value of the initial working time length, namely judging whether T is uvc ≥T 0 . If yes, step S16 is executed, otherwise step S25 is executed.
In a word, according to the air conditioner and the sterilization control method of the air conditioner, on the basis of calculating the initial operation time of the ultraviolet sterilization module according to the refrigerating capacity and the effective sterilization time of the ultraviolet sterilization module, the starting time and the target operation time of the ultraviolet sterilization module are controlled through the accumulated operation time of the indoor fan and the replacement condition of the filter screen, so that the sterilization effect of the ultraviolet sterilization module is ensured to a great extent, and the cost of the ranging sensor can be saved. In addition, the influence of air humidity is also considered when the ultraviolet sterilization module is controlled, when the humidity state of the working environment does not meet the working requirement of the ultraviolet sterilization module, the air humidity is reduced by adjusting the running frequency of the compressor, so that the sterilization effect is ensured, meanwhile, the running time of the ultraviolet sterilization module is properly shortened, the loss of the ultraviolet sterilization module is reduced, and the service life of the ultraviolet sterilization module is prolonged.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. An air conditioner, comprising:
an indoor fan and an outdoor fan;
a refrigerant circulation loop for circulating the refrigerant in a loop formed by the compressor, the condenser, the expansion valve, the evaporator, the four-way valve and the pressure reducer;
an outdoor heat exchanger and an indoor heat exchanger, one of which is a condenser and the other of which is an evaporator;
The ultraviolet sterilization module is used for sterilizing the evaporator through ultraviolet rays;
the controller is configured to respond to a sterilization function starting instruction, and obtain the initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in the unit space;
acquiring the accumulated operation time of the indoor fan;
controlling the ultraviolet sterilization module according to the accumulated operation time length of the indoor fan and the initial working time length;
when the ultraviolet sterilization module is in starting operation, determining that the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value, and sending a filter screen cleaning prompt instruction;
determining that the accumulated running time of the indoor fan reaches a first preset running time lower limit value, wherein the second preset running time upper limit value is larger than the first preset running time upper limit value;
acquiring the humidity state of the working environment of the ultraviolet sterilization module;
and controlling the ultraviolet sterilization module according to the initial working time and the humidity state of the working environment.
2. The air conditioner of claim 1, wherein the controller is further specifically configured to:
When the accumulated operation time length of the indoor fan reaches the upper limit value of the first preset operation time length, controlling the ultraviolet sterilization module to start operation;
correcting the initial working time length through a first correction coefficient to obtain a first target working time length of the ultraviolet sterilization module, wherein the first correction coefficient is larger than 1;
acquiring the actual working time length of the ultraviolet sterilization module after starting operation;
and when the actual working time length is determined to reach the upper limit value of the first target working time length, controlling the ultraviolet sterilization module to stop running.
3. The air conditioner of claim 2, wherein the controller is further specifically configured to:
receiving a filter screen cleaning completion instruction, controlling zero clearing of the accumulated running time length of the indoor fan, and obtaining the latest accumulated running time length of the indoor fan after the zero clearing of the accumulated running time length;
and controlling the ultraviolet sterilization module according to the latest accumulated operation time and the initial working time.
4. The air conditioner of claim 3, wherein the controller is further specifically configured to:
and if the filter screen cleaning completion instruction is not received, controlling the ultraviolet sterilization module to continue to operate until the actual working time length of the ultraviolet sterilization module reaches the first target working time length upper limit value.
5. The air conditioner of claim 1, wherein the controller is further specifically configured to:
acquiring indoor environment temperature and evaporator coil temperature;
if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is larger than a preset upper temperature limit value, determining that the working environment humidity state of the ultraviolet sterilization module is an abnormal environment humidity state;
and if the temperature difference between the indoor environment temperature and the temperature of the evaporator coil is smaller than a preset temperature lower limit value, determining that the working environment humidity state of the ultraviolet sterilization module is a normal environment humidity state.
6. An air conditioner according to claim 1, wherein,
the air conditioner further comprises a humidity detection module, wherein the humidity detection module is connected with the controller and is used for detecting the humidity of the working environment where the ultraviolet sterilization module is located;
the controller is further specifically configured to:
if the working environment humidity is greater than the preset humidity upper limit value, determining that the working environment humidity state of the ultraviolet sterilization module is an abnormal environment humidity state;
and if the working environment humidity is smaller than the preset humidity lower limit value, determining that the working environment humidity state of the ultraviolet sterilization module is a normal environment humidity state.
7. The air conditioner according to claim 5 or 6, wherein the controller is further specifically configured to:
determining the working environment humidity state as an abnormal environment humidity state, and controlling the compressor to reduce the running frequency;
controlling the ultraviolet sterilization module to start running;
correcting the initial working time length through a second correction coefficient to obtain a second target working time length of the ultraviolet sterilization module, wherein the second correction coefficient is <1;
acquiring the actual working time length of the ultraviolet sterilization module after starting operation;
and determining that the actual working time length reaches the upper limit value of the second target working time length, and controlling the ultraviolet sterilization module to stop running.
8. The air conditioner according to claim 5 or 6, wherein the controller is further specifically configured to:
determining the humidity state of the working environment as a normal environment humidity state, and controlling the ultraviolet sterilization module to start running;
acquiring the actual working time length of the ultraviolet sterilization module after starting operation;
and when the actual working time length is determined to reach the upper limit value of the initial working time length, controlling the ultraviolet sterilization module to stop running.
9. The air conditioner of claim 1, wherein the controller, when obtaining the initial operating time of the ultraviolet sterilization module, is further specifically configured to:
The initial operating time is obtained by the following formula:
wherein ,for the initial operating time length, < >>For the cooling capacity of the air conditioner, +.>For the effective sterilization period.
10. A sterilization control method of an air conditioner, wherein the air conditioner includes an ultraviolet sterilization module, the sterilization control method comprising:
responding to a sterilization function starting instruction, and obtaining initial working time of the ultraviolet sterilization module according to the refrigerating capacity of the air conditioner and the effective sterilization time of the ultraviolet sterilization module in a unit space;
acquiring the accumulated operation time of the indoor fan;
controlling the ultraviolet sterilization module according to the accumulated operation time length of the indoor fan and the initial working time length;
when the ultraviolet sterilization module is in starting operation, determining that the accumulated operation duration of the indoor fan reaches a second preset operation duration upper limit value, and sending a filter screen cleaning prompt instruction;
determining that the accumulated running time of the indoor fan reaches a first preset running time lower limit value, wherein the second preset running time upper limit value is larger than the first preset running time upper limit value;
acquiring the humidity state of the working environment of the ultraviolet sterilization module;
And controlling the ultraviolet sterilization module according to the initial working time and the humidity state of the working environment.
11. The sterilization control method of an air conditioner according to claim 10, wherein controlling the ultraviolet sterilization module according to the accumulated operation time length of the indoor fan and the initial operation time length comprises:
when the accumulated operation time length of the indoor fan reaches the upper limit value of the first preset operation time length, controlling the ultraviolet sterilization module to start operation;
correcting the initial working time length through a first correction coefficient to obtain a first target working time length of the ultraviolet sterilization module, wherein the first correction coefficient is larger than 1;
acquiring the actual working time length of the ultraviolet sterilization module after starting operation;
and when the actual working time length is determined to reach the upper limit value of the first target working time length, controlling the ultraviolet sterilization module to stop running.
12. The sterilization control method of an air conditioner according to claim 11, further comprising:
receiving a filter screen cleaning completion instruction, controlling zero clearing of the accumulated running time length of the indoor fan, and obtaining the latest accumulated running time length of the indoor fan after the zero clearing of the accumulated running time length;
And controlling the ultraviolet sterilization module according to the latest accumulated operation time and the initial working time.
CN202210461385.6A 2022-04-28 2022-04-28 Air conditioner and sterilization control method thereof Active CN114857675B (en)

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CN114234380A (en) * 2021-11-12 2022-03-25 广东积微科技有限公司 Air conditioner sterilization control method and air conditioner

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CN105972764A (en) * 2016-05-25 2016-09-28 广东美的制冷设备有限公司 Sterilization method and device and air conditioner
CN112178882A (en) * 2019-07-05 2021-01-05 青岛海尔空调器有限总公司 Air conditioner sterilization control method and air conditioner
CN111397129A (en) * 2020-03-27 2020-07-10 广东美的制冷设备有限公司 Degerming control method of air conditioner, air conditioner and readable storage medium
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