CN110645636B - Fresh air conditioner and control method thereof - Google Patents

Fresh air conditioner and control method thereof Download PDF

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Publication number
CN110645636B
CN110645636B CN201911046212.2A CN201911046212A CN110645636B CN 110645636 B CN110645636 B CN 110645636B CN 201911046212 A CN201911046212 A CN 201911046212A CN 110645636 B CN110645636 B CN 110645636B
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China
Prior art keywords
air
duct
exhaust
fresh air
fresh
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CN201911046212.2A
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Chinese (zh)
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CN110645636A (en
Inventor
张玉峰
古展彰
毛建平
黎磊
杨力
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
    • F24F1/0038—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room in combination with simultaneous exhaustion of inside air
    • 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
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
    • 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
    • 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
    • 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
    • F24F1/0087—Indoor units, e.g. fan coil units with humidification means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
    • 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
    • F24F13/02—Ducting arrangements
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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]
    • Y02B30/56—Heat recovery units

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)
  • Central Air Conditioning (AREA)

Abstract

The application provides a fresh air conditioner and a control method thereof. The heat exchange core body is provided with a fresh air flow passage and an exhaust flow passage, the fresh air flow passage is communicated with the fresh air duct, and the exhaust flow passage is communicated with the exhaust duct. The first heat exchanger is arranged in the fresh air channel, and the heat recovery channel is connected between the exhaust channel and the exhaust runner. The second heat exchanger is arranged in the heat recovery air duct and is connected with the first heat exchanger through a refrigerant pipeline. And after the heat exchange core body performs heat recovery and cold recovery on the air flow in the air exhaust air duct, other heat and cold in the air exhaust air duct are recovered through the second heat exchanger in the heat recovery air duct, so that the heat recovery efficiency of the fresh air conditioner is improved, and the fresh air conditioner is more energy-saving.

Description

Fresh air conditioner and control method thereof
Technical Field
The application relates to the technical field of air conditioning equipment, in particular to a fresh air conditioner and a control method thereof.
Background
In order to cope with the increasingly serious energy crisis, energy conservation and environmental protection have become human consensus. The energy consumption of daily life can be effectively reduced by constructing the green energy-saving building. Due to the excellent heat preservation performance of the 'green energy-saving building', the traditional indoor air treatment equipment can be operated under lower power consumption and can meet the requirements of users.
For the fresh air machine, in order to perform indoor and outdoor air replacement, the energy of indoor air is inevitably increased and lost, and the load of other air treatment equipment in the green energy-saving building is increased. The heat exchange efficiency of the existing total heat exchange type fresh air machine can reach about 60 percent. However, the heat exchange efficiency still causes larger energy loss, and how to further improve the heat recovery efficiency is a bottleneck in the industry and one of the problems to be solved in building a 'green energy-saving building'.
Disclosure of Invention
The embodiment of the application provides a fresh air conditioner and a control method thereof, which are used for solving the technical problem of low heat recovery efficiency of the fresh air conditioner in the prior art.
The embodiment of the application provides a fresh air conditioner, which comprises the following components: the air conditioner comprises an air conditioner main body, wherein a fresh air duct and an exhaust air duct are formed in the air conditioner main body; the heat exchange core body is arranged in the air conditioner main body, a fresh air flow channel and an exhaust flow channel are formed on the heat exchange core body, the fresh air flow channel is communicated with the fresh air channel, the exhaust flow channel is communicated with the exhaust air channel, and air flow in the exhaust air channel is in heat exchange with air flow in the fresh air channel through the heat exchange core body; the fresh air conditioner further comprises: the first heat exchanger is arranged in the fresh air duct and used for refrigerating or heating air flow in the fresh air duct; the heat recovery air duct is connected between the exhaust air duct and the exhaust runner; the second heat exchanger is arranged in the heat recovery air duct and is connected with the first heat exchanger through a refrigerant pipeline, and the second heat exchanger is used for recovering heat or cold of air flow in the exhaust air duct.
In one embodiment, the fresh air conditioner further comprises a first air valve, the first air valve is installed on the air exhaust duct, the first air valve comprises a first air direction adjusting position and a second air direction adjusting position, the air flow of the air exhaust duct is adjusted to enter the air exhaust flow passage firstly by the first air direction adjusting position, and the air flow of the air exhaust duct is adjusted to enter the heat recovery duct firstly by the second air direction adjusting position.
In one embodiment, the first damper further comprises a third wind direction adjustment position that adjusts the flow of the exhaust duct directly from the inlet of the exhaust duct to the outlet of the exhaust duct.
In one embodiment, the fresh air conditioner further comprises: the bypass air duct is connected between the exhaust air duct and the fresh air duct.
In one embodiment, a bypass duct is connected between the heat recovery duct and the exhaust duct, and the bypass duct is also connected with the fresh air duct.
In one embodiment, a second air valve is arranged between the bypass air duct and the exhaust air duct, the second air valve is used for controlling the communication between the bypass air duct and the exhaust air duct, a third air valve is arranged between the bypass air duct and the fresh air duct, and the third air valve is used for controlling the communication between the bypass air duct and the fresh air duct.
In one embodiment, the first damper further includes a fourth wind direction adjustment position that blocks airflow of the exhaust duct from flowing from the inlet of the exhaust duct to the outlet of the exhaust duct.
In one embodiment, the heat exchange core, the heat recovery air duct and the bypass air duct are arranged in sequence from top to bottom in the vertical direction.
In one embodiment, the fresh air conditioner further comprises an upper layer air duct located at the top of the heat exchange core and connected between the air exhaust runner and the air exhaust duct.
In one embodiment, the fresh air conditioner further comprises a first filter mounted in the fresh air duct and upstream of the heat exchange core.
In one embodiment, the fresh air conditioner further comprises a purification module mounted in the fresh air duct and located between the heat exchange core and the first heat exchanger.
In one embodiment, the fresh air conditioner further comprises a humidification module located in the fresh air duct and downstream of the first heat exchanger.
In one embodiment, the fresh air conditioner further comprises a second filter mounted in the exhaust duct and upstream of the heat exchange core.
In one embodiment, the air conditioner main body is provided with a fresh air inlet and a fresh air outlet which are respectively connected with the fresh air duct, and the air conditioner main body is also provided with an air exhaust inlet and an air exhaust outlet which are respectively connected with the air exhaust duct.
In one embodiment, a fresh air fan is arranged in the fresh air duct, the fresh air fan is used for enabling air flow to flow from the fresh air inlet to the fresh air outlet, and an exhaust fan is arranged in the exhaust duct and is used for enabling air flow to flow from the exhaust air inlet to the exhaust air outlet.
In one embodiment, the fresh air conditioner comprises a first water pan, and the first water pan is arranged below the first heat exchanger.
In one embodiment, the fresh air conditioner comprises a first water pump, wherein the first water pump is arranged at the first water receiving disc and is used for discharging water in the first water receiving disc out of the air conditioner main body.
In one embodiment, the fresh air conditioner comprises a second water pan, and the second water pan is arranged below the second heat exchanger.
In one embodiment, the fresh air conditioner comprises a second water pump, the second water pump is arranged at the second water receiving disc, and the second water pump is used for discharging water in the second water receiving disc out of the air conditioner main body.
The application also provides a control method of the fresh air conditioner, which is used for the fresh air conditioner and comprises the following steps: the refrigerating mode is used for controlling the first air valve to a first air direction adjusting position, controlling the second air valve to be opened and controlling the third air valve to be closed under the refrigerating mode; and in the heating mode, the first air valve is controlled to a second air direction adjusting position, the second air valve is controlled to be opened, and the third air valve is controlled to be closed.
In one embodiment, a control method includes: and in the bypass mode, the first air valve is controlled to a third air direction adjusting position, the second air valve is controlled to be closed, and the third air valve is controlled to be closed.
In one embodiment, a control method includes: and in the internal circulation mode, the first air valve is controlled to a fourth air direction adjusting position, the second air valve is controlled to be opened, and the third air valve is controlled to be opened.
In the above embodiment, after the heat exchange core body performs heat recovery and cold recovery on the air flow in the air exhaust duct, other heat and cold in the air exhaust duct are also recovered through the second heat exchanger in the heat recovery duct, so that the heat recovery efficiency of the fresh air conditioner is improved, and the fresh air conditioner is more energy-saving. In addition, the second heat exchanger is also arranged in the air conditioner main body, so that the number of the heat exchangers is reduced, and the cost is reduced; on the other hand, the switching of the refrigerating and heating modes is realized, the heat transfer effect is optimized, and the heating and frosting in winter are prevented. The application reduces the energy dissipation of the building to the outside, can reduce the indoor refrigerating/heating quantity demand in the environment-friendly energy-saving building, and further can reduce the cost of the air conditioner by reducing the volume of the two devices and the quantity of the refrigerant.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 is an external structural schematic view of an embodiment of a fresh air conditioner according to the present application;
FIG. 2 is a schematic view of the front internal structure of the fresh air conditioner of FIG. 1;
FIG. 3 is a schematic view of the internal back structure of the fresh air conditioner of FIG. 1;
FIG. 4 is a schematic view of an enlarged structure at a heat exchange core of the fresh air conditioner of FIG. 2;
FIG. 5 is a schematic view of the fresh air conditioner of FIG. 2 in a cooling mode;
FIG. 6 is a schematic view of the fresh air conditioner of FIG. 2 in a heating mode;
FIG. 7 is a schematic view of the fresh air conditioner of FIG. 2 in bypass mode;
fig. 8 is a schematic structural view of the fresh air conditioner of fig. 2 in an internal circulation mode.
Detailed Description
The present application will be described in further detail with reference to the following embodiments and the accompanying drawings, in order to make the objects, technical solutions and advantages of the present application more apparent. The exemplary embodiments of the present application and the descriptions thereof are used herein to explain the present application, but are not intended to limit the application.
In order to solve the technical problem of low heat recovery efficiency of a fresh air conditioner in the prior art, the application provides the fresh air conditioner, and the secondary recovery of exhaust energy is realized by combining the second heat exchanger 42 with the heat exchange core 30, so that the heat recovery efficiency of the fresh air conditioner is improved.
As shown in fig. 1, 2 and 3, the fresh air conditioner of the present embodiment includes an air conditioner main body in which a fresh air duct 10 and an exhaust air duct 20 are formed, and a heat exchange core 30 is disposed in the air conditioner main body. The heat exchange core 30 is provided with a fresh air flow passage and an exhaust flow passage, the fresh air flow passage is communicated with the fresh air duct 10, the exhaust flow passage is communicated with the exhaust air duct 20, and the air flow in the exhaust air duct 20 is in heat exchange with the air flow in the fresh air duct 10 through the heat exchange core 30. The fresh air conditioner further comprises a first heat exchanger 41, a heat recovery air duct and a second heat exchanger 42. The first heat exchanger 41 is disposed in the fresh air duct 10, and is used for refrigerating or heating the air flow in the fresh air duct 10, and the heat recovery duct is connected between the exhaust duct 20 and the exhaust runner. The second heat exchanger 42 is disposed in the heat recovery air duct, the second heat exchanger 42 is connected with the first heat exchanger 41 through a refrigerant pipeline, and the second heat exchanger 42 is used for recovering heat or cold of the air flow in the exhaust air duct 20.
By applying the technical scheme of the application, after the heat exchange core 30 carries out heat recovery and cold recovery on the air flow in the air exhaust duct 20, the second heat exchanger 42 in the heat recovery duct also carries out recovery on other heat and cold in the air exhaust duct 20, so that the heat recovery efficiency of the fresh air conditioner is improved, and the fresh air conditioner is more energy-saving. In addition, the second heat exchanger 42 is also arranged in the air conditioner main body, so that the number of heat exchangers is reduced, and the cost is reduced; on the other hand, the switching of the refrigerating and heating modes is realized, the heat transfer effect is optimized, and the heating and frosting in winter are prevented. The application reduces the energy dissipation of the building to the outside, can reduce the indoor refrigerating/heating quantity demand in the environment-friendly energy-saving building, and further can reduce the cost of the air conditioner by reducing the volume of the two devices and the quantity of the refrigerant.
Preferably, in the solution of the present application, the heat exchange core 30 is a total heat exchanger.
As shown in fig. 5 and 6, in the technical solution of this embodiment, the fresh air conditioner further includes a first air valve 51, where the first air valve 51 is installed on the air exhaust duct 20, the first air valve 51 includes a first air direction adjusting position and a second air direction adjusting position, where the first air direction adjusting position adjusts the air flow of the air exhaust duct 20 to enter the air exhaust flow channel first, and the second air direction adjusting position adjusts the air flow of the air exhaust duct 20 to enter the heat recovery duct first. When the air conditioner is in refrigeration operation, the first air valve 51 moves to a first air direction adjusting position, exhaust air absorbs heat again after passing through the heat exchange core 30 to provide cooling capacity for the refrigerant, and accordingly cooling capacity of the exhaust air is further recovered. Because the exchange efficiency of the heat exchange core 30 is not 100%, the exhaust temperature passing through the heat exchange core 30 is still lower than that of the outdoor air, so that the heat exchange temperature difference when the second heat exchanger 42 is arranged in the heat recovery air duct is larger than that when the second heat exchanger 42 is arranged outdoors, the heat exchange effect is better, and the arrangement mode can reduce the heat exchanger area under the condition of meeting the same refrigerating capacity, thereby not only reducing the cost, but also reducing the wind resistance. When the air conditioner is in heating operation, the first air valve 51 moves to the second air direction adjusting position, the exhaust air firstly passes through the second heat exchanger 42, and then exchanges heat with outdoor fresh air through the heat exchange core 30 to exchange humidity, so that the problem of heating frost of the air conditioner is effectively avoided, the residual heat of the exhaust air is recovered, and defrosting is not needed when the heating operation is realized. If the exhaust air passes through the heat exchange core 30, the indoor air and the outdoor air exchange heat and humidity, then the temperature is reduced and the relative humidity is increased, and the low-temperature high-relative humidity air exchanges heat with the second heat exchanger 42, which has serious frosting effect.
As shown in fig. 7, in the technical solution of the present embodiment, the first air valve 51 further includes a third air direction adjusting position, where the air flow of the air exhaust duct 20 is adjusted to flow directly from the inlet of the air exhaust duct 20 to the outlet of the air exhaust duct 20. In this state, the exhaust air directly flows to the outlet of the exhaust air duct 20 through the inlet of the exhaust air duct 20 to be discharged outdoors, and the fresh air directly enters indoors through the fresh air duct 10, so that the running resistance is greatly reduced, the double bypass running of fresh air and exhaust air is realized, and the energy conservation and consumption reduction are realized.
As shown in fig. 4, in the technical solution of this embodiment, the fresh air conditioner further includes: the bypass duct 61, the bypass duct 61 is connected between the exhaust duct 20 and the fresh air duct 10. The bypass duct 61 can introduce the air flow in the exhaust duct 20 into the fresh air duct 10, thereby realizing the internal circulation or dehumidification of the air. Optionally, a bypass duct 61 is connected between the heat recovery duct and the exhaust duct 20, and the bypass duct 61 is also connected with the fresh air duct 10. The bypass duct 61 may be used to communicate between the heat recovery duct and the exhaust duct 20 on the one hand, and the bypass duct 61 may also be used to communicate the exhaust duct 20 with the fresh air duct 10 on the other hand. Preferably, a second air valve 52 is arranged between the bypass air duct 61 and the exhaust air duct 20, and a third air valve 53 is arranged between the bypass air duct 61 and the fresh air duct 10. In use, the second damper 52 is used to control the communication of the bypass duct 61 with the exhaust duct 20 and the third damper 53 is used to control the communication of the bypass duct 61 with the fresh air duct 10.
As a more preferred embodiment, fig. 8 shows. In the technical solution of the present embodiment, the first air valve 51 further includes a fourth air direction adjusting position, where the fourth air direction adjusting position blocks the air flow of the air exhaust duct 20 from the inlet of the air exhaust duct 20 to the outlet of the air exhaust duct 20. When the fresh air conditioner is in the internal circulation or dehumidification mode, the first air valve 51 is controlled to move to the fourth air direction adjusting position, so that the air flows in the air exhaust duct 20 enter the fresh air duct 10 through the bypass duct 61.
As shown in fig. 4, in the technical solution of the present embodiment, the heat exchange core 30, the heat recovery air duct and the bypass air duct 61 are sequentially arranged from top to bottom in the vertical direction, and when the heat exchange core 30 works, the air flow in the air exhaust air duct 20 passes through the heat exchange core 30 in the vertical direction, and the air flow in the fresh air duct 10 passes through the heat exchange core 30 in the horizontal direction. Optionally, the fresh air conditioner further includes an upper air duct 62, where the upper air duct 62 is located at the top of the heat exchange core 30 and is connected between the air exhaust channel and the air exhaust channel 20, that is, the air exhaust channel of the heat exchange core 30 is respectively communicated with the air exhaust channel 20 through the upper air duct 62 and the bypass air duct 61, and the fresh air duct 10 is directly communicated with the fresh air channel of the heat exchange core 30.
Optionally, in the technical solution of this embodiment, the fresh air conditioner further includes a first filter 71, where the first filter 71 is installed in the fresh air duct 10 and is located upstream of the heat exchange core 30, so that the air flow entering the fresh air duct 10 from the beginning can be filtered, and dust is prevented from affecting the operation of each device in the fresh air duct 10. More preferably, the fresh air conditioner further includes a second filter 72, and the second filter 72 is installed in the exhaust duct 20 and located upstream of the heat exchange core 30, so that the air flow initially entering the exhaust duct 20 can be filtered, and dust is prevented from affecting the operation of various devices in the exhaust duct 20.
As shown in fig. 2 and 3, in the technical solution of the present embodiment, the fresh air conditioner further includes a purification module 73, and the purification module 73 is installed in the fresh air duct 10 and located between the heat exchange core 30 and the first heat exchanger 41. The air can be further purified by the purification module 73, and pollutants in the air can be reduced. Preferably, the fresh air conditioner further includes a humidification module 74, the humidification module 74 is installed in the fresh air duct 10, and the humidification module 74 is located downstream of the first heat exchanger 41, and air humidity can be increased by the humidification module 74 to improve user comfort.
In the technical scheme of the embodiment, a fresh air inlet 11 and a fresh air outlet 12 which are respectively connected with a fresh air duct 10 are arranged on an air conditioner main body, and an air exhaust inlet 21 and an air exhaust outlet 22 which are respectively connected with an air exhaust duct 20 are also arranged on the air conditioner main body. The fresh air outlet 12 and the exhaust air inlet 21 are communicated with the indoor space, and the fresh air inlet 11 and the exhaust air outlet 22 are communicated with the outdoor space. More preferably, a fresh air fan 13 is arranged in the fresh air duct 10, and an exhaust fan 23 is arranged in the exhaust air duct 20. In use, the fresh air blower 13 is used to flow air from the fresh air inlet 11 to the fresh air outlet 12, and the exhaust blower 23 is used to flow air from the exhaust air inlet 21 to the exhaust air outlet 22.
Alternatively, as shown in fig. 3, the fresh air conditioner includes a first water receiving tray 411, the first water receiving tray 411 is installed below the first heat exchanger 41, and the first water receiving tray 411 is used for receiving condensation water generated on the first heat exchanger 41. More preferably, the fresh air conditioner comprises a first water pump 412, the first water pump 412 is installed at the first water receiving disc 411, and the first water pump 412 is used for discharging water in the first water receiving disc 411 out of the air conditioner main body. The water in the first water receiving tray 411 can be discharged out of the air conditioner main body in time by the first water pump 412.
Optionally, the fresh air conditioner includes a second water receiving tray 421, the second water receiving tray 421 is installed below the second heat exchanger 42, and the second water receiving tray 421 is used for receiving condensation water generated on the second heat exchanger 42. More preferably, the fresh air conditioner comprises a second water pump, the second water pump is installed at the second water receiving disc 421, and the second water pump is used for discharging water in the second water receiving disc 421 out of the air conditioner main body. The water in the second water receiving tray 421 can be timely discharged out of the air conditioner main body through the second water pump.
The application also provides a control method of the fresh air conditioner, which is used for the fresh air conditioner and comprises the following steps:
a cooling mode in which the first damper 51 is controlled to a first damper position, the second damper 52 is controlled to be opened, and the third damper 53 is controlled to be closed;
in the heating mode, the first damper 51 is controlled to the second damper position, the second damper 52 is controlled to be opened, and the third damper 53 is controlled to be closed.
In the cooling mode, the first air valve 51 moves to the first air direction adjusting position, the exhaust air absorbs heat again after passing through the heat exchange core 30 to provide cooling capacity for the refrigerant, and accordingly cooling capacity of the exhaust air is further recovered. Because the exchange efficiency of the heat exchange core 30 is not 100%, the exhaust temperature passing through the heat exchange core 30 is still lower than that of the outdoor air, so that the heat exchange temperature difference when the second heat exchanger 42 is arranged in the heat recovery air duct is larger than that when the second heat exchanger 42 is arranged outdoors, the heat exchange effect is better, and the arrangement mode can reduce the heat exchanger area under the condition of meeting the same refrigerating capacity, thereby not only reducing the cost, but also reducing the wind resistance. Specifically, in combination with the above-described preferred embodiment, the fresh air fan 13 and the exhaust fan 23 are operated according to a set gear, and the first heat exchanger 41 and the second heat exchanger 42 are operated, and at this time, the first heat exchanger 41 serves as an evaporator to provide cold energy, and the second heat exchanger 42 serves as a condenser to operate according to refrigeration. The stepping motor controls the first air valve 51 to rotate to the first air direction adjusting position as shown in fig. 5, the second air valve 52 is opened, the third air valve 53 is closed, and the fresh air path is: fresh air inlet 11, first filter 71, heat exchange core 30, fresh air fan 13, purification module 73, first heat exchanger 41, humidification module 74 and fresh air outlet 12. The exhaust air path is as follows: the air exhaust inlet 21, the second filter 72, the first air valve 51, the heat exchange core 30, the second heat exchanger 42, the second air valve 52, the air exhaust fan 23 and the air exhaust outlet 22.
In the heating mode, the first air valve 51 moves to the second air direction adjusting position, the air exhaust passes through the second heat exchanger 42, and the heat exchange and the humidity exchange are performed between the heat exchange core 30 and the outdoor fresh air, so that the heating frost problem of the air conditioner is effectively avoided, the residual heat of the air exhaust is recovered, and the heating operation is realized without defrosting. If the exhaust air passes through the heat exchange core 30, the indoor air and the outdoor air exchange heat and humidity, then the temperature is reduced and the relative humidity is increased, and the low-temperature high-relative humidity air exchanges heat with the second heat exchanger 42, which has serious frosting effect. Specifically, as shown in fig. 6, when the unit heats, the fresh air fan 13 and the exhaust fan 23 operate according to a set gear, the first heat exchanger 41 and the second heat exchanger 42 operate, the operation mode is switched by the four-way valve, the first heat exchanger 41 serves as a condenser to provide heat, and the second heat exchanger 42 serves as an evaporator to perform heating operation. The stepping motor controls the first air valve 51 to rotate to the second air direction adjusting position as shown in fig. 6, the second air valve 52 is opened, the third air valve 53 is closed, and the fresh air path is: fresh air inlet 11, first filter 71, heat exchange core 30, fresh air fan 13, purification module 73, first heat exchanger 41, humidification module 74 and fresh air outlet 12. The exhaust air path is as follows: the air exhaust inlet 21, the second filter 72, the first air valve 51, the second air valve 52, the second heat exchanger 42, the heat exchange core 30, the air exhaust fan 23 and the air exhaust outlet 22.
More preferably, the control method of the present application further includes a bypass mode in which the first damper 51 is controlled to the third damper position, the second damper 52 is controlled to be closed, and the third damper 53 is controlled to be closed. Specifically, as shown in fig. 7, an air box is arranged between the unit exhaust air inlet 21 and the fresh air inlet 11 to detect air quality, including information such as PM2.5, CO2 concentration, temperature, humidity, etc. When the difference of various indexes of the fresh air inlet and the exhaust air inlet is smaller than a preset value, a bypass mode is started. At this time, the stepping motor controls the first air valve 51 to rotate to the third air direction adjusting position, the second air valve 52 closes the fresh air fan 13, the exhaust fan 23 operates according to the set gear, and the heat exchanger system stops operating. At this time, the fresh air path is as follows: fresh air inlet 11, first filter 71, heat exchange core 30, fresh air fan 13, purification module 73, first heat exchanger 41, humidification module 74 and fresh air outlet 12. The exhaust air path is as follows: the exhaust air inlet 21, the second filter 72, the first air valve 51, the exhaust fan 23 and the exhaust air outlet 22. At the moment, through the switching of the air valve, the running resistance is greatly reduced, the double bypass running of fresh air and exhaust air is realized, and the energy is saved and the consumption is reduced.
More preferably, the control method of the present application further includes an internal circulation mode in which the first damper 51 is controlled to the fourth damper position, the second damper 52 is controlled to be opened, and the third damper 53 is controlled to be opened. Specifically, as shown in fig. 8, when the internal circulation mode is operated, the exhaust fan 23 is stopped, the fresh air fan 13 is operated according to the set gear, the first air valve 51 is opened to the second air direction adjusting position, the second air valve 52 is opened, the third air valve 53 is opened, the heat exchanger system is stopped, and the internal circulation air path at this time is: the air exhaust inlet 21, the second filter 72, the first air valve 51, the second air valve 52, the third air valve 53, the fresh air fan 13, the purification module 73, the first heat exchanger 41, the humidification module 74 and the fresh air outlet 12. By switching the damper, the resistance components not involved in the air path, such as the second heat exchanger 42 and the heat exchange core 30, are shielded, reducing power consumption. Preferably, the air flow can be dehumidified in the internal circulation mode, and during dehumidification, the second air valve 52 is opened to the fourth air direction adjustment position, the first heat exchanger 41 and the second heat exchanger 42 are put into operation, the second heat exchanger 42 is used as an evaporator by reversing through the four-way valve, moisture in the air is condensed, the first heat exchanger 41 is used as a condenser, and the dehumidified air is subjected to temperature rising treatment.
According to the technical scheme, the air valves are switched in a limited space, so that the number and the use area of the heat exchangers are reduced, the switching of a plurality of functions is completed, and the functions of secondary recovery of exhaust energy, temperature and humidity control and purification of fresh air entering the room are realized. Through the design to the wind channel, on the one hand reduces the heat exchanger quantity of use, reduce cost. On the other hand, the switching of the refrigerating and heating modes is realized, the heat transfer effect is optimized, and the heating and frosting in winter are prevented. And the air duct is optimized, so that the internal wind resistance is reduced. The air conditioner can meet the following conditions: 1. recovering heat of exhaust air cooling capacity; 2. the heat exchange core 30 is matched with the heat exchanger under the refrigerating and heating conditions, so that the problems of reduced efficiency of the heat exchange core 30 during refrigeration, frosting of the heat exchanger during heating and the like are avoided.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations can be made to the embodiments of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (16)

1. A fresh air conditioner comprising:
the air conditioner comprises an air conditioner main body, wherein a fresh air duct (10) and an exhaust air duct (20) are formed in the air conditioner main body;
the heat exchange core body (30) is arranged in the air conditioner main body, a fresh air flow channel and an exhaust flow channel are formed on the heat exchange core body (30), the fresh air flow channel is communicated with the fresh air channel (10), the exhaust flow channel is communicated with the exhaust air channel (20), and air flow in the exhaust air channel (20) is in heat exchange with air flow in the fresh air channel (10) through the heat exchange core body (30);
the fresh air conditioner is characterized by further comprising:
the first heat exchanger (41) is arranged in the fresh air duct (10) and is used for refrigerating or heating the air flow in the fresh air duct (10);
the heat recovery air duct is connected between the exhaust air duct (20) and the exhaust air flow passage;
the second heat exchanger (42) is arranged in the heat recovery air duct, the second heat exchanger (42) is connected with the first heat exchanger (41) through a refrigerant pipeline, and the second heat exchanger (42) is used for recovering heat or cold of air flow in the exhaust air duct (20);
the fresh air conditioner further comprises a first air valve (51), the first air valve (51) is arranged on the air exhaust duct (20), the first air valve (51) comprises a first air direction adjusting position and a second air direction adjusting position, the first air direction adjusting position is used for adjusting the air flow of the air exhaust duct (20) to enter the air exhaust flow channel firstly, and the second air direction adjusting position is used for adjusting the air flow of the air exhaust duct (20) to enter the heat recovery duct firstly;
the first air valve (51) further comprises a third air direction adjusting position, and the third air direction adjusting position adjusts the air flow of the air exhaust air duct (20) to flow from the inlet of the air exhaust air duct (20) to the outlet of the air exhaust air duct (20) directly;
the fresh air conditioner further comprises: a bypass air duct (61), wherein the bypass air duct (61) is connected between the exhaust air duct (20) and the fresh air duct (10);
the air conditioner is characterized in that a fresh air inlet (11) and a fresh air outlet (12) which are respectively connected with the fresh air duct (10) are arranged on the air conditioner main body, and an air exhaust inlet (21) and an air exhaust outlet (22) which are respectively connected with the air exhaust duct (20) are also arranged on the air conditioner main body;
the bypass air duct (61) is connected between the heat recovery air duct and the air exhaust air duct (20), the bypass air duct (61) is also connected with the fresh air duct (10), a second air valve (52) is arranged between the bypass air duct (61) and the air exhaust air duct (20), and the second air valve (52) is used for controlling the communication between the bypass air duct (61) and the air exhaust air duct (20);
the heat exchange core body (30), the heat recovery air duct and the bypass air duct (61) are sequentially arranged from top to bottom in the vertical direction.
2. Fresh air conditioner according to claim 1, characterized in that a third air valve (53) is arranged between the bypass air duct (61) and the fresh air duct (10), the third air valve (53) being used for controlling the communication of the bypass air duct (61) with the fresh air duct (10).
3. Fresh air conditioner according to claim 2, wherein the first damper (51) further comprises a fourth wind direction adjustment position blocking the flow of air of the air discharge duct (20) from the inlet of the air discharge duct (20) to the outlet of the air discharge duct (20).
4. The fresh air conditioner according to claim 1, further comprising an upper layer air duct (62), the upper layer air duct (62) being located on top of the heat exchange core (30) and connected between the exhaust air flow channel and the exhaust air duct (20).
5. Fresh air conditioner according to claim 1, further comprising a first filter (71), the first filter (71) being mounted in the fresh air duct (10) and upstream of the heat exchange core (30).
6. Fresh air conditioner according to claim 1, further comprising a purification module (73), the purification module (73) being mounted in the fresh air duct (10) and being located between the heat exchange core (30) and the first heat exchanger (41).
7. Fresh air conditioner according to claim 1, further comprising a humidification module (74), the humidification module (74) being located in the fresh air duct (10) and the humidification module (74) being located downstream of the first heat exchanger (41).
8. Fresh air conditioner according to claim 1, further comprising a second filter (72), the second filter (72) being mounted in the exhaust duct (20) and upstream of the heat exchange core (30).
9. Fresh air conditioner according to claim 1, wherein a fresh air fan (13) is arranged in the fresh air duct (10), the fresh air fan (13) is used for enabling air flow to flow from the fresh air inlet (11) to the fresh air outlet (12), an air exhaust fan (23) is arranged in the air exhaust duct (20), and the air exhaust fan (23) is used for enabling air flow to flow from the air exhaust inlet (21) to the air exhaust outlet (22).
10. The fresh air conditioner according to claim 1, characterized in that the fresh air conditioner comprises a first water pan (411), the first water pan (411) being mounted below the first heat exchanger (41).
11. The fresh air conditioner according to claim 10, characterized in that the fresh air conditioner comprises a first water pump (412), the first water pump (412) being mounted at the first water pan (411), the first water pump (412) being for draining water in the first water pan (411) out of the air conditioner body.
12. Fresh air conditioner according to claim 1, characterized in that it comprises a second water pan (421), said second water pan (421) being mounted below said second heat exchanger (42).
13. The fresh air conditioner according to claim 12, comprising a second water pump mounted at the second water pan (421), the second water pump being for draining water in the second water pan (421) out of the air conditioner body.
14. A control method of a fresh air conditioner, wherein the control method is used for controlling the fresh air conditioner according to claim 3, and the control method comprises:
a cooling mode in which the first damper (51) is controlled to the first damper position, the second damper (52) is controlled to be opened, and the third damper (53) is controlled to be closed;
and a heating mode, wherein the first air valve (51) is controlled to the second air direction adjusting position, the second air valve (52) is controlled to be opened, and the third air valve (53) is controlled to be closed.
15. The control method according to claim 14, characterized in that the control method includes: and a bypass mode in which the first damper (51) is controlled to the third damper position, the second damper (52) is controlled to be closed, and the third damper (53) is controlled to be closed.
16. The control method according to claim 14, characterized in that the control method includes: and an internal circulation mode in which the first air valve (51) is controlled to the fourth air direction adjustment position, the second air valve (52) is controlled to be opened, and the third air valve (53) is controlled to be opened.
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