CN115235022A - Air conditioner and fresh air control method thereof - Google Patents

Air conditioner and fresh air control method thereof Download PDF

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Publication number
CN115235022A
CN115235022A CN202210934310.5A CN202210934310A CN115235022A CN 115235022 A CN115235022 A CN 115235022A CN 202210934310 A CN202210934310 A CN 202210934310A CN 115235022 A CN115235022 A CN 115235022A
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CN
China
Prior art keywords
fresh air
air
heat exchanger
expansion valve
electronic expansion
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Granted
Application number
CN202210934310.5A
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Chinese (zh)
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CN115235022B (en
Inventor
向世焜
李林
邹海如
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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 CN202210934310.5A priority Critical patent/CN115235022B/en
Publication of CN115235022A publication Critical patent/CN115235022A/en
Application granted granted Critical
Publication of CN115235022B publication Critical patent/CN115235022B/en
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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
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • 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
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—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
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F2003/144—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only
    • F24F2003/1446—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by dehumidification only by condensing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fluid Mechanics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner and a fresh air control method thereof, wherein outdoor fresh air inlet is divided into two air inlet channels, one channel is internally provided with an outdoor small heat exchanger which can effectively dehumidify and heat fresh air and the like to control the humidity of the fresh air and avoid condensation and water blowing of an indoor unit, the other channel is a channel provided with a baffle plate, the air inlet volume of the fresh air can be effectively increased when the baffle plate is opened, when a user needs to quickly change the fresh air, the air inlet volume of the fresh air can be increased due to the existence of the channel, the air inlet volume of the fresh air can be effectively increased, and simultaneously, the balance of fresh air humidity control and the fresh air inlet volume can be well achieved.

Description

Air conditioner and fresh air control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a fresh air control method thereof.
Background
With the improvement of living standard, people have higher and higher requirements on living environment, and more importance is attached to health and comfort, and the quality of indoor air is directly related to the health of people, so that the indoor air quality also becomes one of evaluation elements of living environment. To improve indoor air quality, the most effective way is to improve indoor fresh air volume, and this can generally be realized through modes such as windowing, but when having indoor air conditioning equipment just to be under operation, in order to avoid its performance to receive the influence, generally can't adopt the mode of windowing, consequently, has had the demand to the air conditioner of taking new trend function certainly. At present, the air conditioner with the fresh air function is generally provided with a small heat exchanger in an outdoor fresh air system, so that fresh air is dehumidified and indoor anhydrous humidification is carried out through condensate water after dehumidification, but the fresh air is reduced due to the fact that the small heat exchanger can obstruct the flow of the fresh air, and the balance of fresh air humidity control and fresh air intake cannot be well achieved.
Disclosure of Invention
The invention aims to provide an air conditioner and a fresh air control method thereof, wherein outdoor fresh air inlet is divided into two air inlet channels, one channel is internally provided with an outdoor small heat exchanger which can effectively control the fresh air humidity, and the other channel is provided with a baffle plate which can be opened or closed according to the control of a user, so that the air inlet quantity of the fresh air can be effectively improved, and simultaneously, the balance between the fresh air humidity control and the fresh air inlet quantity can be well achieved.
To achieve the above object, an embodiment of the present invention provides an air conditioner, including:
an indoor unit for adjusting the temperature and/or humidity of indoor air;
the outdoor unit is connected with the indoor unit through an on-line pipe;
the fresh air supply device is arranged in the outdoor unit and comprises a first air inlet channel and a second air inlet channel, a fresh air heat exchanger is arranged in the first air inlet channel, a wind shielding plate is arranged on the second air inlet channel, and the fresh air supply device is used for conveying outdoor air to the indoor space through the first air inlet channel and/or the second air inlet channel;
the controller is used for controlling a refrigerant in the refrigerating system not to flow through the fresh air heat exchanger and opening the wind shielding plate when detecting that the fresh air supply function is started and the fresh air dehumidification function is closed; when detecting that fresh air supply function and fresh air dehumidification function all start, the control refrigerant flows through the fresh air heat exchanger to and when the air conditioner is in the non-air supply mode, control according to detecting the heat transfer temperature of fresh air heat exchanger the action of shutter.
As an improvement of the above scheme, the indoor unit includes an indoor heat exchanger; the outdoor unit also comprises a compressor, an outdoor heat exchanger, a throttling component, a first electronic expansion valve and a second electronic expansion valve; the compressor, the outdoor heat exchanger, the throttling assembly and the indoor heat exchanger are sequentially connected, two ends of the fresh air heat exchanger are respectively connected with the first electronic expansion valve and the second electronic expansion valve, and the other ends of the first electronic expansion valve and the second electronic expansion valve are respectively connected to the throttling assembly.
As an improvement of the above scheme, when it is detected that the fresh air dehumidification function is closed, the first electronic expansion valve and the second electronic expansion valve are closed, and a refrigerant in the refrigeration system does not flow through the fresh air heat exchanger;
when the fresh air dehumidification function is detected to be started, the first electronic expansion valve and the second electronic expansion valve are opened; when the air conditioner is in a refrigeration mode, a dehumidification mode or an air supply mode, a refrigerant in the refrigeration system flows through the fresh air heat exchanger through the first electronic expansion valve and flows into the indoor heat exchanger through the second electronic expansion valve; when the air conditioner is in a heating mode, the refrigerant in the refrigerating system flows through the fresh air heat exchanger through the second electronic expansion valve and flows into the outdoor heat exchanger through the first electronic expansion valve.
As an improvement of the scheme, after the refrigerant is controlled to flow through the fresh air heat exchanger, when the air conditioner is in an air supply mode, the controller is also used for controlling the air shielding plate to be closed.
As an improvement of the above scheme, the action of controlling the wind shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger includes:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold value, controlling the wind shielding plate to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, controlling the wind shielding plate to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are both greater than or equal to a preset second temperature threshold value, controlling the wind shielding plate to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the wind shielding plate is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the wind shielding plate is controlled to be closed.
As an improvement of the scheme, the first air inlet channel and the second air inlet channel are arranged in parallel, and the sectional area of the first air inlet channel is larger than that of the second air supply channel.
In order to achieve the above object, an embodiment of the present invention further provides a fresh air control method for an air conditioner, where the air conditioner includes a fresh air supply device disposed in an outdoor unit, the fresh air supply device includes a first air inlet channel and a second air inlet channel, a fresh air heat exchanger is disposed in the first air inlet channel, a wind shielding plate is disposed on the second air inlet channel, and the fresh air supply device is configured to convey outdoor air to the indoor space through the first air inlet channel and/or the second air inlet channel; then, the method comprises:
when the fresh air supply function is detected to be started and the fresh air dehumidification function is detected to be closed, controlling the refrigerant in the refrigeration system not to flow through the fresh air heat exchanger and opening the wind shielding plate;
when detecting that the fresh air supply function and the fresh air dehumidification function are both started, controlling a refrigerant to flow through the fresh air heat exchanger, and when the air conditioner is in a non-air supply mode, controlling the action of the air shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger.
As an improvement of the above scheme, after the refrigerant is controlled to flow through the fresh air heat exchanger, the method further comprises the following steps:
and when the air conditioner is in an air supply mode, controlling the air shield to be closed.
As an improvement of the above scheme, the action of controlling the wind shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger includes:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold value, controlling the wind shielding plate to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, controlling the wind shielding plate to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are both greater than or equal to a preset second temperature threshold value, controlling the wind shielding plate to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the wind shielding plate is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the wind shielding plate is controlled to be closed.
As an improvement of the scheme, the first air inlet channel and the second air inlet channel are arranged in parallel, and the sectional area of the first air inlet channel is larger than that of the second air supply channel.
Compared with the prior art, the air conditioner and the fresh air control method thereof disclosed by the embodiment of the invention have the advantages that the outdoor fresh air inlet is divided into two air inlet channels, one channel is internally provided with the outdoor small heat exchanger which can effectively dehumidify and heat fresh air to control the humidity of the fresh air and avoid condensation and water blowing of an indoor unit, the other channel is a channel provided with the baffle, the air inlet volume of the fresh air can be effectively increased when the baffle is opened, when a user needs to quickly change the fresh air, the air inlet volume of the fresh air can be increased due to the existence of the channel, the air inlet volume of the fresh air can be effectively increased, and meanwhile, the balance between the humidity control of the fresh air and the air inlet volume of the fresh air can be well achieved.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an outdoor fresh air system according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a fresh air channel according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a refrigeration system provided by an embodiment of the present invention;
FIG. 5 is a flow chart of the operation of the controller in the cooling mode provided by an embodiment of the present invention;
FIG. 6 is a schematic flow diagram of the refrigerant when the fresh air dehumidifying function is turned off in the cooling mode according to the embodiment of the present invention;
fig. 7 is a schematic flow direction diagram of the refrigerant when the fresh air dehumidifying function is turned on in the cooling mode according to the embodiment of the present invention;
FIG. 8 is a flowchart illustrating operation of the controller in a heating mode according to an embodiment of the present invention;
FIG. 9 is a schematic flow diagram of the refrigerant when the fresh air dehumidifying function is turned off in the heating mode according to the embodiment of the present invention;
fig. 10 is a schematic flow direction diagram of the refrigerant when the fresh air dehumidifying function is turned on in the heating mode according to the embodiment of the present invention;
FIG. 11 is a flowchart illustrating operation of the controller in the dehumidification mode according to an embodiment of the present invention;
FIG. 12 is a flowchart illustrating operation of the controller in the blowing mode according to an embodiment of the present invention;
fig. 13 is a flowchart of a method for controlling fresh air of an air conditioner according to an embodiment of the present invention.
100, an indoor unit; 200. an outdoor unit; 20A, a first air inlet channel; 20B, a second air inlet channel; 20C, an outdoor fresh air inlet; 11. a compressor; 12. an outdoor heat exchanger; 13. a throttle assembly; 14. an indoor heat exchanger; 15. a fresh air heat exchanger; 16. a first electronic expansion valve; 17. a second electronic expansion valve; 201. a wind shield plate; 202. a water pan; 203. and a drainage device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention, and the air conditioner according to the embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 is used to adjust the temperature and/or humidity of indoor air, the outdoor unit 200 is connected to the indoor unit 100 through a connecting pipe, the outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors.
Referring to fig. 2 to 3, the present invention provides a fresh air inlet channel for an outdoor fresh air system, the channel divides an original single channel into two or more inlet channel regions, in the embodiment of the present invention, two inlet channels are preferred, which are a first inlet channel 20A and a second inlet channel 20B, respectively, a fresh air heat exchanger 15 is arranged in the first inlet channel 20A, a wind shielding plate 201 is arranged on the second inlet channel 20B, and the fresh air supply device is used for supplying outdoor air to the indoor space through the first inlet channel 20A and/or the second inlet channel 20B. The invention selects two fresh air inlet channels, mainly takes the design into consideration of simplification, the fresh air channels are designed into two channels which meet the current functional requirements (achieve two action points of dehumidification and air volume increase), the same effect can be achieved by increasing the air inlet channels, but the difficulty and the precision of control can be increased, and the difficulty of mold design and mold opening is increased.
Specifically, the first air inlet channel 20A and the second air inlet channel 20B are arranged in parallel, and are located at a lower air inlet of an air inlet 20C in the outdoor fresh air system, outdoor fresh air enters the outdoor fresh air casing through the air inlet 20C, and then flows to the indoor space through the first air inlet channel 20A and the second air inlet channel 20B, the cross sections of the first air inlet channel 20A and the second air inlet channel 20B are regular quadrangles, the cross section area of the first air inlet channel 20A is larger than the cross section area of the second air inlet channel 20B, for example, the cross section area ratio of the first air inlet channel 20A to the second air inlet channel 20B is 2:1, which may also be designed as a cross section ratio of other ratios, which is not specifically limited herein.
In the embodiment of the invention, the shape of the fresh air channel is designed into a regular polygon, mainly considering that the dehumidification device of the outdoor small heat exchanger is easy to match with the dehumidification device, and the shape of the existing heat exchanger is mostly regular polygon and is easy to produce, process and manufacture. The shape of the fresh air channel can also be designed into other shapes such as a circle, a triangle and the like, but the difficulty of the production and assembly process of the fresh air channel is correspondingly increased. In addition, the larger cross-sectional area of the first air inlet channel 20A with the dehumidification function is to realize dehumidification and ensure a certain fresh air inlet amount.
Specifically, the cross section of the air inlet of the second air inlet channel 20B is provided with an openable or closable air shielding plate 201, two sides of the air shielding plate 201 are provided with stepping motors to control the opening and closing of the air shielding plate 201, the working mode is similar to the wind swing of an air conditioner hanging machine, the air shielding plate 201 is closed according to a fresh air control logic, when fresh air needs to be dehumidified, the fresh air flows through the first air inlet channel 20A and is dehumidified by the fresh air heat exchanger 15; when indoor needs trade new trend fast, the board 201 that hides opens, increase new trend intake this moment.
Specifically, the fresh air heat exchanger 15 is located in the first air inlet channel 20A and perpendicular to the flow direction of fresh air, the fresh air heat exchanger 15 is perpendicular to the water pan 202, and one end of the fresh air heat exchanger close to the drainage device 203 is fixed to the water pan 202 through a screw; the water receiving tray 202 is positioned below the first air inlet channel 20A, can collect moisture dehumidified by fresh air, is horizontally placed in an outdoor fresh air shell, and is fixed with the shell through screws on two sides; the drainage device 203 is positioned below the water pan 202 and above the outdoor heat exchanger 12, and discharges condensed water to the outside, and the drainage device 203 is fixed with the outdoor fresh air shell through a screw close to one end of the water pan 202; a humidity sensor (not shown in the figure) is positioned at an air inlet of the outdoor fresh air system and used for detecting the humidity value of outdoor fresh air; the temperature sensor (not shown in the figure) is located on the U-shaped pipe in the middle of the fresh air heat exchanger 15 and is used for detecting the temperature of the U-shaped pipe of the fresh air heat exchanger 15.
Referring to fig. 4, fig. 4 is a schematic diagram of a framework of a refrigeration system provided by an embodiment of the present invention, the refrigeration system including: the air conditioner comprises a compressor 11, an outdoor heat exchanger 12, a throttling assembly 13, an indoor heat exchanger 14, a fresh air heat exchanger 15, a first electronic expansion valve 16 and a second electronic expansion valve 17. The compressor 11, the outdoor heat exchanger 12, the throttling assembly 13 and the indoor heat exchanger 14 are sequentially connected, two ends of the fresh air heat exchanger 15 are respectively connected with the first electronic expansion valve 16 and the second electronic expansion valve 17, and the other ends of the first electronic expansion valve 16 and the second electronic expansion valve 17 are respectively connected to the throttling assembly 11. When the air conditioner works, the temperature of the fresh air heat exchanger 15 is lower than the outdoor environment temperature by adjusting the opening degrees of the first electronic expansion valve 16 and the second electronic expansion valve 17, so that the dehumidification result is achieved.
Specifically, when it is detected that the fresh air dehumidification function is closed, the first electronic expansion valve 16 and the second electronic expansion valve 17 are closed, and the refrigerant in the refrigeration system does not flow through the fresh air heat exchanger 15;
when the fresh air dehumidification function is detected to be started, the first electronic expansion valve 16 and the second electronic expansion valve 17 are opened; when the air conditioner is in a refrigeration mode, a dehumidification mode or an air supply mode, the refrigerant in the refrigeration system flows through the fresh air heat exchanger 15 through the first electronic expansion valve 16 and flows into the indoor heat exchanger 14 through the second electronic expansion valve 17; when the air conditioner is in a heating mode, the refrigerant in the refrigeration system flows through the fresh air heat exchanger 15 through the second electronic expansion valve 17, and flows into the outdoor heat exchanger 12 through the first electronic expansion valve 16.
The controller of the embodiment of the invention is used for: the fresh air heat exchanger is used for controlling a refrigerant in the refrigeration system not to flow through the fresh air heat exchanger 15 and opening the wind shielding plate 201 when detecting that a fresh air supply function is started and a fresh air dehumidification function is closed; when the fresh air supply function and the fresh air dehumidification function are both started, a refrigerant is controlled to flow through the fresh air heat exchanger 15, and when the air conditioner is in a non-air supply mode (a refrigeration mode, a heating mode and a dehumidification mode), the action of the air shielding plate 201 is controlled according to the detected heat exchange temperature of the fresh air heat exchanger 15; when the air conditioner is in the air supply mode, the controller is also used for controlling the wind shielding plate 201 to be closed.
Specifically, the action of controlling the wind shielding plate 201 according to the detected heat exchange temperature of the fresh air heat exchanger 15 includes:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold, controlling the wind shielding plate 201 to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, the wind shielding plate 201 is controlled to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are both greater than or equal to a preset second temperature threshold value, the wind shielding plate 201 is controlled to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the air shielding plate 201 is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the air shielding plate 201 is controlled to be closed.
When the air conditioner is operated in a cooling mode:
referring to fig. 5, fig. 5 is a flowchart illustrating an operation of a controller in a cooling mode according to an embodiment of the present invention, where the controller is configured to execute steps S101 to S111:
s101, starting up and running in a refrigeration mode, and then entering a step S102;
s102, judging whether a fresh air supply function is started, if so, entering a step S104, and if not, entering a step S103;
s103, if the fresh air supply function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, controlling the wind shielding plate 201 to be closed, and ending the process;
s104, if the fresh air supply function is started, judging whether the fresh air dehumidification function is started, if so, entering a step S106, and if not, entering a step S105;
s105, if the fresh air dehumidification function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, and controlling the wind shielding plate 201 to be opened; at this time, outdoor fresh air flows through the first air inlet channel 20A and the second air inlet channel 20B;
s106, if the fresh air dehumidification function is started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be opened, and then entering the step S107;
s107, reading the heat exchange temperature of the fresh air heat exchanger 15, and then entering the step S108;
s108, judging whether the heat exchange temperature is greater than or equal to a first temperature threshold (such as 1 ℃), if so, entering a step S111, otherwise, entering a step S109;
s109, when the heat exchange temperature is lower than the first temperature threshold, in order to avoid blocking fresh air caused by frosting of the fresh air heat exchanger 15, the air shielding plate 201 is controlled to be opened to ensure the air intake of indoor fresh air exchange, and then the step S110 is carried out;
s110, judging whether the following conditions are met: the heat exchange temperature is larger than or equal to a second temperature threshold value, the temperature is read again after a preset time interval, if the temperature is larger than or equal to the second temperature threshold value, the step S111 is carried out, and if the temperature is not larger than the second temperature threshold value, the step S110 is repeatedly executed;
and S111, controlling the wind shielding plate 201 to be closed.
For example, the refrigeration mode is started to operate, the fresh air exchange function button is not opened, at this time, the first electronic expansion valve 16 and the second electronic expansion valve 17 are closed, and the type of the air conditioner is consistent with that of the current common refrigeration air conditioner. Referring to fig. 6, fig. 6 is a schematic flow direction diagram of a refrigerant when the fresh air dehumidification function is turned off in the refrigeration mode according to the embodiment of the present invention, where a refrigerant flow direction of the refrigeration system is as follows: discharged from the compressor 11, flows to the outdoor heat exchanger 12, throttled by the throttle unit 13, flows to the indoor heat exchanger 14, and returns to the suction port of the compressor 11. After the fresh air exchange function in the refrigeration mode is started, the interface of the remote controller prompts whether to dehumidify the fresh air, if the fresh air is not dehumidified or the user does not select the fresh air, the fresh air dehumidification function is closed by default, and at the moment, the flowing direction of the refrigerant of the refrigeration system can refer to fig. 6.
For example, after the fresh air exchange and supply function in the refrigeration mode is turned on, the remote controller interface prompts whether to dehumidify the fresh air, and the selection is that the outdoor fresh air system dehumidifies the fresh air, as shown in fig. 7, fig. 7 is a schematic diagram of a refrigerant flow direction when the fresh air dehumidification function is turned on in the refrigeration mode according to an embodiment of the present invention, and at this time, the refrigerant flow direction of the refrigeration system is: the air is discharged from the compressor 11, flows to the outdoor heat exchanger 12, one part of the air flows to the indoor heat exchanger 14 through the throttling component 13, the other part of the air flows to the fresh air heat exchanger 15 in the fresh air system through the first electronic expansion valve 16, then flows to the indoor heat exchanger 14 through the second electronic expansion valve 17, and then returns to the air suction port of the compressor 11.
When the air conditioner operates in a heating mode:
referring to fig. 8, fig. 8 is a flowchart illustrating an operation of a controller in a heating mode according to an embodiment of the present invention, where the controller is configured to execute steps S201 to S211:
s201, starting up and running in a heating mode, and then entering a step S202;
s202, judging whether a fresh air supply function is started, if so, entering a step S204, and if not, entering a step S203;
s203, if the fresh air supply function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, controlling the wind shielding plate 201 to be closed, and ending the process;
s204, if the fresh air supply function is started, judging whether the fresh air dehumidification function is started, if so, entering a step S206, and if not, entering a step S205;
s205, if the fresh air dehumidification function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, and controlling the wind shielding plate 201 to be opened; at this time, outdoor fresh air flows through the first air inlet channel 20A and the second air inlet channel 20B;
s206, if the fresh air dehumidification function is started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be opened, and then entering the step S207;
s207, reading the heat exchange temperature of the fresh air heat exchanger 15, and then entering the step S208;
s208, judging whether the heat exchange temperature is greater than or equal to a first temperature threshold (such as 1 ℃), if so, entering a step S211, otherwise, entering a step S209;
s209, when the heat exchange temperature is lower than the first temperature threshold, in order to avoid blocking fresh air caused by frosting of the fresh air heat exchanger 15, the wind shielding plate 201 is controlled to be opened to ensure the air intake of indoor fresh air exchange, and then the step S210 is carried out;
s210, judging whether the heat exchange temperature is greater than or equal to a first temperature threshold value, if so, entering a step S211, and if not, repeatedly executing the step S210;
and S211, controlling the wind shielding plate 201 to be closed.
In an exemplary mode, the air conditioner is started to operate in a heating mode, the fresh air exchange function key is not opened, the first electronic expansion valve 16 and the second electronic expansion valve 17 are closed at the moment, and the type of the air conditioner is consistent with that of the existing common refrigeration air conditioner. Referring to fig. 9, fig. 9 is a schematic flow direction of the refrigerant when the fresh air dehumidification function is turned off in the heating mode according to the embodiment of the present invention, where a flow direction of the refrigerant of the refrigeration system is as follows: is discharged from the compressor 11, flows to the indoor heat exchanger 14, throttled by the throttle unit 13, flows to the outdoor heat exchanger 12, and returns to the suction port of the compressor 11. After the fresh air exchange function in the heating mode is started, the interface of the remote controller prompts whether to dehumidify the fresh air, if the fresh air is not dehumidified or the user does not select the fresh air, the fresh air dehumidification function is closed by default, and at the moment, the flowing direction of the refrigerant of the refrigeration system can refer to fig. 9.
For example, after the fresh air exchanging and supplying function in the heating mode is turned on, the remote controller interface may prompt whether to dehumidify the fresh air, and the selection is that the outdoor fresh air system dehumidifies the fresh air at this time, which may be referred to fig. 10, where fig. 10 is a schematic diagram of a refrigerant flow direction when the fresh air dehumidifying function is turned on in the heating mode provided by an embodiment of the present invention, and at this time, a refrigerant flow direction of the refrigeration system is: the air is discharged from the compressor 11, flows to the indoor heat exchanger 14, one part of the air flows to the outdoor heat exchanger 12 through throttling of the throttling component 13, the other part of the air flows to the fresh air heat exchanger 15 in the fresh air system through the second electronic expansion valve 17, then flows to the outdoor heat exchanger 12 through the first electronic expansion valve 16, and then returns to the air suction port of the compressor 11.
When the air conditioner is operated in a dehumidification mode:
referring to fig. 11, fig. 11 is a flowchart illustrating the operation of the controller in the dehumidification mode according to the embodiment of the present invention; the controller is configured to execute steps S301 to S311, and the working process of steps S301 to S311 is the same as that of steps S101 to S111, which is not described herein again, and similarly, the refrigerant flow direction is also the same as that of the refrigeration mode, which is not described herein again.
When the air conditioner is operated in an air supply mode:
referring to fig. 12, fig. 12 is a flowchart illustrating the operation of the controller in the air blowing mode according to the embodiment of the present invention, where the controller is configured to execute steps S401 to S416:
s401, starting up and running in an air supply mode, and then entering a step S402;
s402, judging whether a fresh air supply function is started, if so, entering a step S404, and if not, entering a step S403;
s403, if the fresh air supply function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, and controlling the wind shielding plate 201 to be closed, and ending the process;
s404, if the fresh air supply function is started, judging whether the fresh air dehumidification function is started, if so, entering a step S405, and if not, entering a step S406;
s405, if a fresh air dehumidification function is started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be opened, and controlling the wind shielding plate 201 to be closed;
s406, if the fresh air dehumidification function is not started, controlling the first electronic expansion valve 16 and the second electronic expansion valve 17 to be closed, and controlling the wind shielding plate 201 to be opened; at this time, the fresh outdoor air flows through the first air inlet channel 20A and the second air inlet channel 20B.
For example, after the air supply mode of the air conditioner is started, the outdoor fresh air exchange function is not started, the first electronic expansion valve 16 and the second electronic expansion valve 17 are in a closed state, at this time, the compressor does not work, and the refrigerant does not flow. After the air supply mode of the air conditioner is started, the outdoor fresh air exchange function is started, the interface of the remote controller prompts whether to dehumidify the fresh air, and if not, or if not, the user does not select, the fresh air dehumidification function is closed by default. The first electronic expansion valve 16 and the second electronic expansion valve 17 are in a closed state, the compressor does not work, and the refrigerant does not flow. After the air supply mode of the air conditioner is started, the outdoor fresh air exchange function is started, and fresh air is dehumidified. At this time, the first electronic expansion valve 16 and the second electronic expansion valve 17 are opened. The wind shielding plate 201 is closed, and outdoor fresh air flows to the indoor from the first air inlet channel 20A. At which time the compressor 11 starts and operates at the lowest frequency. The flow direction of the refrigerant in the air conditioning system is as follows: the air is discharged from the compressor 11, flows to the outdoor heat exchanger 12, one part of the air flows to the indoor heat exchanger 14 through the throttling component 13, the other part of the air flows to the fresh air heat exchanger 15 in the fresh air system through the first electronic expansion valve 16, then flows to the indoor heat exchanger 14 through the second electronic expansion valve 17, and then returns to the air suction port of the compressor 11.
Compared with the prior art, the air conditioner disclosed by the embodiment of the invention has the advantages that the air inlet of the outdoor fresh air is divided into two air inlet channels, one channel is internally provided with the small outdoor heat exchanger which can effectively dehumidify and heat the fresh air to control the humidity of the fresh air and avoid water blowing due to condensation of an indoor unit, the other channel is provided with the baffle, the air inlet volume of the fresh air can be effectively increased when the baffle is opened, when a user needs to quickly change the fresh air, the air inlet volume of the fresh air can be increased due to the existence of the channel, the air inlet volume of the fresh air can be effectively increased, and meanwhile, the balance between the humidity control of the fresh air and the air inlet volume of the fresh air can be well achieved.
Referring to fig. 13, fig. 13 is a flowchart of a fresh air control method of an air conditioner according to an embodiment of the present invention, where the fresh air control method of the air conditioner is implemented by a controller in the air conditioner, the air conditioner includes a fresh air supply device disposed in an outdoor unit, the fresh air supply device includes a first air inlet channel and a second air inlet channel, a fresh air heat exchanger is disposed in the first air inlet channel, a wind shielding plate is disposed on the second air inlet channel, and the fresh air supply device is configured to deliver outdoor air to a room through the first air inlet channel and/or the second air inlet channel; then, the method comprises:
s1, when the starting of a fresh air supply function and the closing of a fresh air dehumidification function are detected, controlling a refrigerant in a refrigeration system not to flow through a fresh air heat exchanger, and opening a wind shielding plate;
s2, when the fresh air supply function and the fresh air dehumidification function are started, a refrigerant is controlled to flow through the fresh air heat exchanger, and when the air conditioner is in a non-air supply mode, the action of the air shielding plate is controlled according to the detected heat exchange temperature of the fresh air heat exchanger.
Specifically, after the refrigerant is controlled to flow through the fresh air heat exchanger, the method further comprises the following steps:
and when the air conditioner is in an air supply mode, controlling the air shield to be closed.
Specifically, the action of the wind shield plate is controlled according to the detected heat exchange temperature of the fresh air heat exchanger, and the action comprises the following steps:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold value, controlling the wind shielding plate to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, controlling the wind shielding plate to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are greater than or equal to a preset second temperature threshold value, controlling the wind shielding plate to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the wind shielding plate is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the wind shielding plate is controlled to be closed.
Specifically, the first air inlet channel and the second air inlet channel are arranged in parallel, and the sectional area of the first air inlet channel is larger than that of the second air supply channel.
Specifically, the indoor unit includes an indoor heat exchanger; the outdoor unit also comprises a compressor, an outdoor heat exchanger, a throttling assembly, a first electronic expansion valve and a second electronic expansion valve; the compressor, the outdoor heat exchanger, the throttling assembly and the indoor heat exchanger are sequentially connected, two ends of the fresh air heat exchanger are respectively connected with the first electronic expansion valve and the second electronic expansion valve, and the other ends of the first electronic expansion valve and the second electronic expansion valve are respectively connected to the throttling assembly.
Specifically, when the fresh air dehumidification function is detected to be closed, the first electronic expansion valve and the second electronic expansion valve are closed, and a refrigerant in the refrigeration system does not flow through the fresh air heat exchanger;
when the fresh air dehumidification function is detected to be started, the first electronic expansion valve and the second electronic expansion valve are opened; when the air conditioner is in a refrigeration mode, a dehumidification mode or an air supply mode, a refrigerant in the refrigeration system flows through the fresh air heat exchanger through the first electronic expansion valve and flows into the indoor heat exchanger through the second electronic expansion valve; when the air conditioner is in a heating mode, the refrigerant in the refrigerating system flows through the fresh air heat exchanger through the second electronic expansion valve and flows into the outdoor heat exchanger through the first electronic expansion valve.
It should be noted that, in the fresh air control method of the air conditioner according to the embodiment of the present invention, reference may be made to the working flowchart of the controller of the air conditioner according to the embodiment described above, and details are not repeated herein.
Compared with the prior art, the fresh air control method of the air conditioner disclosed by the embodiment of the invention divides the fresh air inlet into two air inlet channels, one channel is internally provided with the small outdoor heat exchanger which can effectively dehumidify and heat the fresh air to control the humidity of the fresh air and avoid condensation and water blowing of an indoor unit, the other channel is a channel provided with the baffle, the air inlet volume of the fresh air can be effectively increased when the baffle is opened, when a user needs to quickly change the fresh air, the air inlet volume of the fresh air can be increased due to the existence of the channel, the air inlet volume of the fresh air can be effectively increased, and meanwhile, the balance between the humidity control of the fresh air and the air inlet volume of the fresh air can be well achieved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (10)

1. An air conditioner, comprising:
an indoor unit for adjusting the temperature and/or humidity of indoor air;
the outdoor unit is connected with the indoor unit through an on-line pipe;
the fresh air supply device is arranged in the outdoor unit and comprises a first air inlet channel and a second air inlet channel, a fresh air heat exchanger is arranged in the first air inlet channel, a wind shielding plate is arranged on the second air inlet channel, and the fresh air supply device is used for conveying outdoor air to the indoor space through the first air inlet channel and/or the second air inlet channel;
the controller is used for controlling a refrigerant in the refrigerating system not to flow through the fresh air heat exchanger and opening the wind shielding plate when detecting that the fresh air supply function is started and the fresh air dehumidification function is closed; when detecting that the fresh air supply function and the fresh air dehumidification function are both started, controlling a refrigerant to flow through the fresh air heat exchanger, and when the air conditioner is in a non-air supply mode, controlling the action of the air shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger.
2. The air conditioner according to claim 1, wherein the indoor unit includes an indoor heat exchanger; the outdoor unit also comprises a compressor, an outdoor heat exchanger, a throttling component, a first electronic expansion valve and a second electronic expansion valve; the compressor, the outdoor heat exchanger, the throttling assembly and the indoor heat exchanger are sequentially connected, two ends of the fresh air heat exchanger are respectively connected with the first electronic expansion valve and the second electronic expansion valve, and the other ends of the first electronic expansion valve and the second electronic expansion valve are respectively connected to the throttling assembly.
3. The air conditioner as claimed in claim 2, wherein when it is detected that the fresh air dehumidifying function is turned off, the first electronic expansion valve and the second electronic expansion valve are closed, and a refrigerant in the refrigerating system does not flow through the fresh air heat exchanger;
when the fresh air dehumidification function is detected to be started, the first electronic expansion valve and the second electronic expansion valve are opened; when the air conditioner is in a refrigeration mode, a dehumidification mode or an air supply mode, a refrigerant in the refrigeration system flows through the fresh air heat exchanger through the first electronic expansion valve and flows into the indoor heat exchanger through the second electronic expansion valve; when the air conditioner is in a heating mode, the refrigerant in the refrigerating system flows through the fresh air heat exchanger through the second electronic expansion valve and flows into the outdoor heat exchanger through the first electronic expansion valve.
4. The air conditioner as claimed in claim 1, wherein the controller is further configured to control the damper to close when the air conditioner is in a blowing mode after controlling the refrigerant to flow through the fresh air heat exchanger.
5. The air conditioner according to claim 1, wherein the controlling of the operation of the shutter according to the detected heat exchange temperature of the fresh air heat exchanger comprises:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold value, controlling the wind shielding plate to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, controlling the wind shielding plate to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are both greater than or equal to a preset second temperature threshold value, controlling the wind shielding plate to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the wind shielding plate is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the wind shielding plate is controlled to be closed.
6. The air conditioner of claim 1, wherein the first air supply path and the second air supply path are arranged in parallel, and a sectional area of the first air supply path is larger than a sectional area of the second air supply path.
7. A fresh air control method of an air conditioner is characterized in that the air conditioner comprises a fresh air supply device arranged in an outdoor unit, the fresh air supply device comprises a first air inlet channel and a second air inlet channel, a fresh air heat exchanger is arranged in the first air inlet channel, a wind shielding plate is arranged on the second air inlet channel, and the fresh air supply device is used for conveying outdoor air to the indoor space through the first air inlet channel and/or the second air inlet channel; then, the method comprises:
when the starting of a fresh air supply function and the closing of a fresh air dehumidification function are detected, controlling a refrigerant in a refrigeration system not to flow through the fresh air heat exchanger and opening the wind shielding plate;
when detecting that the fresh air supply function and the fresh air dehumidification function are both started, controlling a refrigerant to flow through the fresh air heat exchanger, and when the air conditioner is in a non-air supply mode, controlling the action of the air shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger.
8. The method as claimed in claim 7, wherein after controlling the refrigerant to flow through the fresh air heat exchanger, the method further comprises:
and when the air conditioner is in an air supply mode, controlling the air shield to be closed.
9. The method for controlling fresh air of an air conditioner according to claim 7, wherein the controlling the operation of the wind shielding plate according to the detected heat exchange temperature of the fresh air heat exchanger comprises:
when the heat exchange temperature is greater than or equal to a preset first temperature threshold value, controlling the wind shielding plate to be closed;
when the heat exchange temperature is smaller than the first temperature threshold value, determining the operation mode of the air conditioner;
when the air conditioner is in a refrigeration mode or a dehumidification mode, controlling the wind shielding plate to be opened, and when the heat exchange temperatures measured twice at intervals of a preset time period are both greater than or equal to a preset second temperature threshold value, controlling the wind shielding plate to be closed; wherein the second temperature threshold is greater than the first temperature threshold;
when the air conditioner is in a heating mode, the wind shielding plate is controlled to be opened, and when the heat exchange temperature is greater than or equal to the first temperature threshold value, the wind shielding plate is controlled to be closed.
10. The method as claimed in claim 7, wherein the first air intake channel and the second air intake channel are arranged in parallel, and the cross-sectional area of the first air intake channel is larger than the cross-sectional area of the second air supply channel.
CN202210934310.5A 2022-08-04 2022-08-04 Air conditioner and fresh air control method thereof Active CN115235022B (en)

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JPH08216666A (en) * 1995-02-10 1996-08-27 Matsushita Electric Ind Co Ltd Air-conditioning and dehumidification device in heat pump for electric vehicle
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CN113432262A (en) * 2021-06-29 2021-09-24 青岛海信日立空调***有限公司 Air conditioning system
CN216431958U (en) * 2021-07-02 2022-05-03 秦文选 Bypass oxygenation and isothermal difference refrigeration fresh air dehumidifier
CN114704875A (en) * 2022-03-11 2022-07-05 海信（广东）空调有限公司 Air conditioner and control method thereof
CN114811876A (en) * 2022-04-22 2022-07-29 海信（广东）空调有限公司 Air conditioner and control method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08216666A (en) * 1995-02-10 1996-08-27 Matsushita Electric Ind Co Ltd Air-conditioning and dehumidification device in heat pump for electric vehicle
CN202403347U (en) * 2011-12-19 2012-08-29 东南大学 Air treatment device
JP2020051667A (en) * 2018-09-26 2020-04-02 東芝キヤリア株式会社 Air conditioner
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CN113432262A (en) * 2021-06-29 2021-09-24 青岛海信日立空调***有限公司 Air conditioning system
CN216431958U (en) * 2021-07-02 2022-05-03 秦文选 Bypass oxygenation and isothermal difference refrigeration fresh air dehumidifier
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CN114811876A (en) * 2022-04-22 2022-07-29 海信（广东）空调有限公司 Air conditioner and control method thereof

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