CN110645636A - Fresh air conditioner and control method thereof - Google Patents
Fresh air conditioner and control method thereof Download PDFInfo
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- CN110645636A CN110645636A CN201911046212.2A CN201911046212A CN110645636A CN 110645636 A CN110645636 A CN 110645636A CN 201911046212 A CN201911046212 A CN 201911046212A CN 110645636 A CN110645636 A CN 110645636A
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
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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
- 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
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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
- 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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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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
- 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
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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
- 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
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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
- 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
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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- 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)
- Central Air Conditioning (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a fresh air conditioner and a control method thereof. A fresh air channel and an exhaust air channel are formed on the heat exchange core body, the fresh air channel is communicated with the fresh air channel, and the exhaust air channel is communicated with the exhaust air channel. The first heat exchanger is arranged in the fresh air duct, and the heat recovery air duct is connected between the exhaust air duct and the exhaust air flow passage. The second heat exchanger is arranged in the heat recovery air duct and is connected with the first heat exchanger through a refrigerant pipeline. After the heat exchange core body carries out heat recovery and cold volume recovery on the air flow in the air exhaust duct, other heat and cold volume in the air exhaust duct are recovered through the second heat exchanger in the heat recovery duct, the heat recovery efficiency of the fresh air conditioner is improved, and the fresh air conditioner is more energy-saving.
Description
Technical Field
The invention 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 deal with the increasingly severe energy crisis, energy conservation and environmental protection have become common consensus. The 'green energy-saving building' is constructed, so that the energy consumption of daily life can be effectively reduced. Because the heat preservation performance of the 'green energy-saving building' is excellent, the traditional indoor air treatment equipment can operate under lower power consumption and can meet the requirements of users.
For the fresh air machine, in order to replace indoor air and outdoor air, the energy of the indoor air is inevitably increased, and the load of other air processing equipment in a green energy-saving building is increased. The heat exchange efficiency of the existing total heat exchange type fresh air fan can reach about 60%. However, the heat exchange efficiency still causes large 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 for constructing the 'green energy-saving building'.
Disclosure of Invention
The embodiment of the invention provides a fresh air conditioner and a control method thereof, and aims to solve the technical problem that the heat recovery efficiency of the fresh air conditioner is low in the prior art.
The embodiment of the application provides a new trend air conditioner, include: 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 is arranged in the air conditioner main body, a fresh air channel and an exhaust air channel are formed on the heat exchange core, the fresh air channel is communicated with the fresh air channel, the exhaust air channel is communicated with the exhaust air channel, and the air flow in the exhaust air channel exchanges heat with the air flow in the fresh air channel through the heat exchange core; fresh air conditioner still includes: the first heat exchanger is arranged in the fresh air duct and is used for refrigerating or heating the air flow in the fresh air duct; the heat recovery air duct is connected between the exhaust air duct and the exhaust air flow passage; 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 air exhaust air duct.
In one embodiment, the fresh air conditioner further comprises a first air valve, the first air valve is installed on the exhaust air duct and comprises a first air direction adjusting position and a second air direction adjusting position, the first air direction adjusting position adjusts the air flow of the exhaust air duct to enter the exhaust air flow channel firstly, and the second air direction adjusting position adjusts the air flow of the exhaust air duct to enter the heat recovery air duct firstly.
In one embodiment, the first air valve further comprises a third air direction adjustment position, and the third air direction adjustment position adjusts the air flow of the exhaust air duct to directly flow from the inlet of the exhaust air duct to the outlet of the exhaust air duct.
In one embodiment, the fresh air conditioner further comprises: and the bypass air channel is connected between the exhaust air channel and the fresh air channel.
In one embodiment, a bypass air duct is connected between the heat recovery air duct and the exhaust air duct, and the bypass air 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 air valve further comprises a fourth air direction adjustment position, and the fourth air direction adjustment position blocks the air flow of the exhaust air duct from flowing from the inlet of the exhaust air duct to the outlet of the exhaust air duct.
In one embodiment, the heat exchange core, the heat recovery air duct and the bypass air duct are arranged in the vertical direction from top to bottom.
In one embodiment, the fresh air conditioner further comprises an upper air duct, which is located on the top of the heat exchange core and is connected between the exhaust air channel and the exhaust air duct.
In one embodiment, the fresh air conditioner further comprises a first filter installed in the fresh air duct and located upstream of the heat exchange core.
In one embodiment, the fresh air conditioner further comprises a purification module, and the purification module is installed in the fresh air duct and is located between the heat exchange core and the first heat exchanger.
In one embodiment, the fresh air conditioner further comprises a humidification module, the humidification module is located in the fresh air duct, and the humidification module is located downstream of the first heat exchanger.
In one embodiment, the fresh air conditioner further comprises a second filter installed in the exhaust air duct and located 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 a 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 an air exhaust duct.
In one embodiment, a fresh air fan is disposed in the fresh air duct, the fresh air fan is configured to allow an air flow to flow from the fresh air inlet to the fresh air outlet, and an exhaust fan is disposed in the exhaust air duct, and the exhaust fan is configured to allow an 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 installed below the first heat exchanger.
In one embodiment, the fresh air conditioner comprises a first water pump, the first water pump is installed at the first water pan, and the first water pump is used for discharging water in the first water pan 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 installed below the second heat exchanger.
In one embodiment, the fresh air conditioner comprises a second water pump, the second water pump is installed at the second water pan, and the second water pump is used for discharging water in the second water pan out of the air conditioner main body.
The application also provides a control method of the fresh air conditioner, the control method is used for the fresh air conditioner, and the control method comprises the following steps: in the refrigeration mode, the first air valve is controlled to reach the first air direction adjusting position, the second air valve is controlled to be opened, and the third air valve is controlled to be closed; and in the heating mode, the first air valve is controlled to reach the 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 reach the 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 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 use number of the heat exchangers is reduced, and the cost is reduced; on the other hand, the switching between the refrigeration mode and the heating mode is realized, the heat transfer effect is optimized, and the heating frosting in winter is prevented. The invention reduces the external energy dissipation of the building, can reduce the indoor refrigeration/heating demand in the green energy-saving building, and further can reduce the cost of the air conditioner by reducing the volume of the two air conditioners and the amount of refrigerant.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is an external structural schematic view of an embodiment of a fresh air conditioner according to the present invention;
FIG. 2 is a schematic view of the front interior 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 an enlarged schematic view of the heat exchange core of the fresh air conditioner of FIG. 2;
FIG. 5 is a schematic diagram of the fresh air conditioner of FIG. 2 in a cooling mode;
fig. 6 is a schematic structural diagram of the fresh air conditioner in fig. 2 in a heating mode;
FIG. 7 is a schematic diagram of the fresh air conditioner of FIG. 2 in a bypass mode;
fig. 8 is a schematic structural diagram of the fresh air conditioner of fig. 2 in an internal circulation mode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to solve the technical problem of low heat recovery efficiency of a fresh air conditioner in the prior art, the invention provides the fresh air conditioner, and the secondary recovery of exhaust energy is realized by arranging the second heat exchanger 42 to be combined 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, a fresh air duct 10 and an exhaust air duct 20 are formed in the air conditioner main body, and a heat exchange core 30 is disposed in the air conditioner main body. The heat exchange core 30 is formed with a fresh air channel and an exhaust air channel, the fresh air channel is communicated with the fresh air channel 10, the exhaust air channel is communicated with the exhaust air channel 20, and the air flow in the exhaust air channel 20 is heat exchanged with the air flow in the fresh air channel 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 cooling or heating the air flow in the fresh air duct 10, and 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 disposed in the heat recovery air duct, the second heat exchanger 42 is connected to 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 invention, after the heat exchange core 30 carries out heat recovery and cold recovery on the air flow in the exhaust air duct 20, other heat and cold in the exhaust air duct 20 are also recovered through the second heat exchanger 42 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. In addition, the second heat exchanger 42 is also arranged in the air conditioner main body, so that the number of used heat exchangers is reduced, and the cost is reduced; on the other hand, the switching between the refrigeration mode and the heating mode is realized, the heat transfer effect is optimized, and the heating frosting in winter is prevented. The invention reduces the external energy dissipation of the building, can reduce the indoor refrigeration/heating demand in the green energy-saving building, and further can reduce the cost of the air conditioner by reducing the volume of the two air conditioners and the amount of refrigerant.
Preferably, in the solution of the present invention, the heat exchange core 30 is a total heat exchanger.
As shown in fig. 5 and fig. 6, in the technical solution of this embodiment, the fresh air conditioner further includes a first air valve 51, the first air valve 51 is installed on the exhaust air duct 20, the first air valve 51 includes a first air direction adjusting position and a second air direction adjusting position, the first air direction adjusting position adjusts the air flow of the exhaust air duct 20 to enter the exhaust air flow channel first, and the second air direction adjusting position adjusts the air flow of the exhaust air duct 20 to enter the heat recovery air duct first. When the air conditioner operates in a cooling mode, the first air valve 51 moves to the first air direction adjusting position, exhausted air passes through the heat exchange core 30 and then absorbs heat again to provide cooling capacity for the refrigerant, and accordingly the cooling capacity of the exhausted air is further recovered. Because the exchange efficiency of the heat exchange core 30 is not 100%, the exhaust air temperature passing through the heat exchange core 30 is still lower than that of outdoor air, therefore, 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 under the condition of meeting the same refrigerating capacity, the arrangement mode can reduce the area of the heat exchangers, not only reduce the cost, but also reduce the wind resistance. When the air conditioner operates in heating mode, the first air valve 51 moves to the second air direction adjusting position, exhaust air firstly passes through the second heat exchanger 42 and then exchanges heat and humidity with outdoor fresh air through the heat exchange core 30, the heating frosting problem of the air conditioner is effectively avoided, residual heat of the exhaust air is recycled, and heating operation is achieved without defrosting. If the discharged air passes through the heat exchange core 30, the temperature is decreased and the relative humidity is increased after the indoor air and the outdoor air exchange heat and moisture, and the air with low temperature and high relative humidity exchanges heat with the second heat exchanger 42 again, which may cause serious frosting.
As shown in fig. 7, in the solution of the present embodiment, the first air valve 51 further includes a third air direction adjusting position, and the third air direction adjusting position adjusts the air flow of the exhaust air duct 20 to directly flow from the inlet of the exhaust air duct 20 to the outlet of the exhaust air 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 the indoor through the fresh air duct 10, so that the operation resistance is greatly reduced, the fresh air and exhaust air double-bypass operation is realized, and the energy is saved and the consumption is reduced.
As shown in fig. 4, in the technical solution of this embodiment, the fresh air conditioner further includes: and the bypass air duct 61, the bypass air duct 61 is connected between the exhaust air duct 20 and the fresh air duct 10. The air flow in the exhaust air duct 20 can be introduced into the fresh air duct 10 through the bypass air duct 61, so as to realize the internal circulation or dehumidification of the air. Optionally, the bypass air duct 61 is connected between the heat recovery air duct and the exhaust air duct 20, and the bypass air duct 61 is further connected with the fresh air duct 10. On one hand, the bypass air duct 61 can be used to communicate the heat recovery air duct with the exhaust air duct 20, and on the other hand, the bypass air duct 61 can also be used to communicate the exhaust air duct 20 with the fresh air duct 10. Preferably, a second air valve 52 is disposed between the bypass air duct 61 and the exhaust air duct 20, and a third air valve 53 is disposed between the bypass air duct 61 and the fresh air duct 10. When in use, the second air valve 52 is used for controlling the communication between the bypass air duct 61 and the exhaust air duct 20, and the third air valve 53 is used for controlling the communication between the bypass air duct 61 and the fresh air duct 10.
As a more preferred embodiment, as shown in fig. 8. In the technical solution of this embodiment, the first air valve 51 further includes a fourth air direction adjusting position, and the fourth air direction adjusting position blocks the air flow of the exhaust air duct 20 from flowing from the inlet of the exhaust air duct 20 to the outlet of the exhaust air 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 flow in the exhaust air duct 20 enters the fresh air duct 10 through the bypass air duct 61.
As shown in fig. 4, in the technical solution of the present embodiment, the heat exchange core 30, the heat recovery air channel and the bypass air channel 61 are sequentially arranged from top to bottom in the vertical direction, when the heat exchange core 30 works, the air flow in the exhaust air channel 20 passes through the heat exchange core 30 in the vertical direction, and the air flow in the fresh air channel 10 passes through the heat exchange core 30 in the horizontal direction. Optionally, the fresh air conditioner further includes an upper air duct 62, the upper air duct 62 is located at the top of the heat exchange core 30 and is connected between the exhaust air channel and the exhaust air channel 20, that is, the exhaust air channel of the heat exchange core 30 is respectively communicated with the exhaust air 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 scheme of this embodiment, the fresh air conditioner further includes a first filter 71, and the first filter 71 is installed in the fresh air duct 10 and located upstream of the heat exchange core 30, so as to filter the air flow entering the fresh air duct 10 at first, and prevent dust 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 air duct 20 and located upstream of the heat exchange core 30, so as to filter the air flow entering the exhaust air duct 20 at first and prevent dust from affecting the operation of the devices in the exhaust air duct 20.
As shown in fig. 2 and fig. 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 is 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 the pollutants in the air can be reduced. Preferably, the fresh air conditioner further comprises a humidifying module 74, the humidifying module 74 is located in the fresh air duct 10, and the humidifying module 74 is located at the downstream of the first heat exchanger 41, and the air humidity can be increased through the humidifying module 74 to improve the comfort of the user.
In the technical scheme of this embodiment, the main body of the air conditioner is provided with a fresh air inlet 11 and a fresh air outlet 12 respectively connected to a fresh air duct 10, and the main body of the air conditioner is further provided with an exhaust air inlet 21 and an exhaust air outlet 22 respectively connected to an exhaust air duct 20. The fresh air outlet 12 and the air exhaust inlet 21 are communicated with the indoor, and the fresh air inlet 11 and the air exhaust outlet 22 are communicated with the outdoor. More preferably, a fresh air blower 13 is disposed in the fresh air duct 10, and an exhaust air blower 23 is disposed in the exhaust air duct 20. When in use, the fresh air blower 13 is used for allowing the air flow to flow from the fresh air inlet 11 to the fresh air outlet 12, and the exhaust air blower 23 is used for allowing the air flow to flow from the exhaust air inlet 21 to the exhaust air outlet 22.
Optionally, as shown in fig. 3, the fresh air conditioner includes a first water pan 411, the first water pan 411 is installed below the first heat exchanger 41, and the first water pan 411 is used for receiving condensed water generated on the first heat exchanger 41. More preferably, the fresh air conditioner includes a first water pump 412, the first water pump 412 is installed at the first water pan 411, and the first water pump 412 is used for discharging water in the first water pan 411 out of the air conditioner main body. The water in the first water receiving tray 411 can be timely discharged out of the air-conditioning body by the first water pump 412.
Optionally, the fresh air conditioner includes a second water pan 421, the second water pan 421 is installed below the second heat exchanger 42, and the second water pan 421 is used for receiving condensed water generated on the second heat exchanger 42. More preferably, the fresh air conditioner includes a second water pump, the second water pump is installed at the second water pan 421, and the second water pump is used for discharging water in the second water pan 421 out of the air conditioner main body. The water in the second water receiving tray 421 can be discharged out of the air conditioner main body in time by the second water pump.
The invention also provides a control method of the fresh air conditioner, which is used for the fresh air conditioner and comprises the following steps:
in the cooling mode, the first air valve 51 is controlled to be at the first 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;
and a heating mode, in which 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.
In the cooling mode of the air conditioner, the first air valve 51 moves to the first air direction adjusting position, and the exhausted air passes through the heat exchange core 30 to absorb heat again to provide cooling capacity for the refrigerant, so that the cooling capacity of the exhausted air is further recovered. Because the exchange efficiency of the heat exchange core 30 is not 100%, the exhaust air temperature passing through the heat exchange core 30 is still lower than that of outdoor air, therefore, 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 under the condition of meeting the same refrigerating capacity, the arrangement mode can reduce the area of the heat exchangers, not only reduce the cost, but also reduce the wind resistance. Specifically, in the above-described preferred embodiment, the fresh air blower 13 and the exhaust air blower 23 operate according to a set gear, the first heat exchanger 41 and the second heat exchanger 42 operate, at this time, the first heat exchanger 41 serves as an evaporator to provide cooling capacity, and the second heat exchanger 42 serves as a condenser to operate according to cooling capacity. 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 at this time, the fresh air path is: the fresh air inlet 11 → the first filter 71 → the heat exchange core 30 → the fresh air blower 13 → the purification module 73 → the first heat exchanger 41 → the humidification module 74 → the fresh air outlet 12. The air exhaust air passage is as follows: the discharge air 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 discharge air blower 23 → the discharge air outlet 22.
In the heating mode of the air conditioner, the first air valve 51 moves to the second air direction adjusting position, exhaust air firstly passes through the second heat exchanger 42 and then exchanges heat and humidity with outdoor fresh air through the heat exchange core 30, the heating frosting problem of the air conditioner is effectively avoided, residual heat of the exhaust air is recycled, and heating operation is achieved without defrosting. If the discharged air passes through the heat exchange core 30, the temperature is decreased and the relative humidity is increased after the indoor air and the outdoor air exchange heat and moisture, and the air with low temperature and high relative humidity exchanges heat with the second heat exchanger 42 again, which may cause serious frosting. Specifically, as shown in fig. 6, when the unit is operated for heating, the fresh air blower 13 and the exhaust air blower 23 are operated according to a set gear, the first heat exchanger 41 and the second heat exchanger 42 are operated, the operation mode is switched by the four-way valve, the first heat exchanger 41 is used as a condenser to provide heat, and the second heat exchanger 42 is used as an evaporator to be operated for heating. The stepping motor controls the first air valve 51 to rotate to the second air direction adjusting position shown in fig. 6, the second air valve 52 is opened, the third air valve 53 is closed, and at this time, the fresh air path is: the fresh air inlet 11 → the first filter 71 → the heat exchange core 30 → the fresh air blower 13 → the purification module 73 → the first heat exchanger 41 → the humidification module 74 → the fresh air outlet 12. The air exhaust air passage is as follows: the discharge air 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 discharge air blower 23 → the discharge air outlet 22.
More preferably, the control method of the present invention further includes a bypass mode, in which the first damper 51 is controlled to the third wind direction adjustment 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, air boxes are disposed at 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, and humidity. And when the difference of various indexes of the fresh air inlet air and the exhaust air inlet air is smaller than a preset value, starting a bypass mode. At this time, the stepping motor controls the first air valve 51 to rotate to a third air direction adjusting position, the second air valve 52 closes the fresh air fan 13, the exhaust air fan 23 operates according to a set gear, and the heat exchanger system stops operating. The fresh air path at this moment is: the fresh air inlet 11 → the first filter 71 → the heat exchange core 30 → the fresh air blower 13 → the purification module 73 → the first heat exchanger 41 → the humidification module 74 → the fresh air outlet 12. The air exhaust air passage is as follows: the discharge air inlet 21 → the second filter 72 → the first air valve 51 → the discharge air blower 23 → the discharge air outlet 22. At the moment, the air valve is switched, so that the running resistance is greatly reduced, the operation of fresh air and exhaust double bypass is realized, and the energy is saved and the consumption is reduced.
More preferably, the control method of the present invention further includes an internal circulation mode, and in the internal circulation mode, 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. Specifically, as shown in fig. 8, when the internal circulation mode is operated, the exhaust fan 23 stops operating, the fresh air fan 13 operates according to a set gear, the first air valve 51 is opened to the second air direction adjustment position, the second air valve 52 is opened, the third air valve 53 is opened, the heat exchanger system stops operating, and the internal circulation air path at this time is: the exhaust air inlet 21 → the second filter 72 → the first air valve 51 → the second air valve 52 → the third air valve 53 → the fresh air blower 13 → the purge module 73 → the first heat exchanger 41 → the humidification module 74 → the fresh air outlet 12. And the resistance components such as the second heat exchanger 42 and the heat exchange core body 30 which are not involved in the air path are shielded through the air valve switching, so that the energy consumption is reduced. 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, and the four-way valve is switched to use the second heat exchanger 42 as an evaporator to condense moisture in the air, and the first heat exchanger 41 as a condenser to heat the dehumidified air.
According to the technical scheme, the air valves are switched in a limited space, so that the using number and the using area of the heat exchangers are reduced, the switching of multiple functions is completed, and the secondary recovery of exhaust air energy and the temperature and humidity control and purification functions of fresh air entering the room are realized. Through to the wind channel design, reduce heat exchanger use quantity on the one hand, reduce cost. On the other hand, the switching between the refrigeration mode and the heating mode is realized, the heat transfer effect is optimized, and the heating frosting in winter is prevented. And optimize the wind channel, reduce the internal windage. The air conditioner can meet the following requirements: 1. recovering the cold and heat of the exhaust air; 2. the heat exchange core 30 and the heat exchanger are matched under the conditions of refrigeration and heating, so that the problems of the heat exchange core 30 that the efficiency is reduced during refrigeration, the heat exchanger frosts during heating and the like are avoided.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the embodiment of the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (22)
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 channel and an exhaust air channel are formed on the heat exchange core body (30), the fresh air channel is communicated with the fresh air channel (10), the exhaust air channel is communicated with the exhaust air channel (20), and air flow in the exhaust air channel (20) is subjected to heat exchange with air flow in the fresh air channel (10) through the heat exchange core body (30);
its characterized in that, new trend air conditioner still includes:
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 channel is connected between the exhaust air channel (20) and the exhaust air flow channel;
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).
2. The fresh air conditioner according to claim 1, further comprising a first air valve (51), wherein the first air valve (51) is installed on the exhaust air 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 adjusts the air flow of the exhaust air duct (20) to enter the exhaust air flow channel first, and the second air direction adjusting position adjusts the air flow of the exhaust air duct (20) to enter the heat recovery air duct first.
3. Fresh air conditioner according to claim 2, characterized in that the first air valve (51) further comprises a third air direction adjusting position which adjusts the air flow of the exhaust air duct (20) to flow directly from the inlet of the exhaust air duct (20) to the outlet of the exhaust air duct (20).
4. The fresh air conditioner according to claim 3, further comprising: and the bypass air duct (61) is connected between the exhaust air duct (20) and the fresh air duct (10).
5. Fresh air conditioner according to claim 4, characterized in that the bypass air duct (61) is connected between the heat recovery air duct and the exhaust air duct (20), and the bypass air duct (61) is also connected with the fresh air duct (10).
6. The fresh air conditioner according to claim 5, wherein a second air valve (52) is disposed between the bypass air duct (61) and the exhaust air duct (20), the second air valve (52) is used for controlling the communication between the bypass air duct (61) and the exhaust air duct (20), a third air valve (53) is disposed between the bypass air duct (61) and the fresh air duct (10), and the third air valve (53) is used for controlling the communication between the bypass air duct (61) and the fresh air duct (10).
7. Fresh air conditioner according to claim 6, characterized in that the first air valve (51) further comprises a fourth wind direction adjustment position, which blocks the air flow of the exhaust air duct (20) from flowing from the inlet of the exhaust air duct (20) to the outlet of the exhaust air duct (20).
8. Fresh air conditioner according to claim 4, characterized in that the heat exchange core (30), the heat recovery air duct and the bypass air duct (61) are arranged in the vertical direction from top to bottom.
9. Fresh air conditioner according to claim 8, characterized in that it further comprises an upper air duct (62), said upper air duct (62) being located on top of said heat exchange core (30) and being connected between said exhaust air flow passage and said exhaust air duct (20).
10. Fresh air conditioner according to claim 1, characterized in that it further comprises a first filter (71), said first filter (71) being mounted in said fresh air duct (10) and upstream of said heat exchange core (30).
11. Fresh air conditioner according to claim 1, characterized in that it further comprises a purification module (73), said purification module (73) being mounted in said fresh air duct (10) and being located between said heat exchange core (30) and said first heat exchanger (41).
12. Fresh air conditioner according to claim 1, characterized in that it further comprises a humidification module (74), said humidification module (74) being located installed in said fresh air duct (10) and said humidification module (74) being located downstream of said first heat exchanger (41).
13. Fresh air conditioner according to claim 1, characterized in that it further comprises a second filter (72), said second filter (72) being mounted in the exhaust air duct (20) and upstream of the heat exchange core (30).
14. The fresh air conditioner according to claim 1, wherein the air conditioner body is provided with a fresh air inlet (11) and a fresh air outlet (12) which are respectively connected with the fresh air duct (10), and the air conditioner body is further provided with an air exhaust inlet (21) and an air exhaust outlet (22) which are respectively connected with the air exhaust duct (20).
15. The fresh air conditioner according to claim 14, wherein a fresh air blower (13) is disposed in the fresh air duct (10), the fresh air blower (13) is used for allowing the air flow to flow from the fresh air inlet (11) to the fresh air outlet (12), an exhaust air blower (23) is disposed in the exhaust air duct (20), and the exhaust air blower (23) is used for allowing the air flow to flow from the exhaust air inlet (21) to the exhaust air outlet (22).
16. Fresh air conditioner according to claim 1, characterized in that it comprises a first water pan (411), said first water pan (411) being mounted below said first heat exchanger (41).
17. The fresh air conditioner as claimed in claim 16, wherein the fresh air conditioner comprises a first water pump (412), the first water pump (412) is installed at the first water receiving tray (411), and the first water pump (412) is used for draining water in the first water receiving tray (411) out of the air conditioner main body.
18. 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).
19. Fresh air conditioner according to claim 18, characterized in that it comprises a second water pump mounted at the second water pan (421) for draining the water in the second water pan (421) out of the air conditioner body.
20. A control method of a fresh air conditioner, wherein the control method is used for controlling the fresh air conditioner as claimed in claim 7, and the control method comprises the following steps:
a cooling mode in which the first damper (51) is controlled to the first wind direction adjustment 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 in the heating mode, the first air valve (51) is controlled to be at 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.
21. The control method according to claim 20, characterized by comprising: a bypass mode in which the first damper (51) is controlled to the third wind direction adjustment position, the second damper (52) is controlled to close, and the third damper (53) is controlled to close.
22. The control method according to claim 20, characterized by comprising: and an internal circulation mode, wherein the first air valve (51) is controlled to the fourth wind direction adjusting 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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| CN112413736A (en) * | 2020-11-09 | 2021-02-26 | 珠海格力电器股份有限公司 | Fresh air conditioner indoor unit, fresh air conditioner and control method of fresh air conditioner |
| CN112503639A (en) * | 2020-12-01 | 2021-03-16 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| WO2023050890A1 (en) * | 2021-09-30 | 2023-04-06 | 中兴通讯股份有限公司 | Indirect evaporative cooling air conditioning system and control method therefor, and air conditioner control device |
| CN114151860A (en) * | 2021-12-03 | 2022-03-08 | 珠海格力电器股份有限公司 | Fresh air conditioner and control method thereof |
| CN114151860B (en) * | 2021-12-03 | 2023-01-06 | 珠海格力电器股份有限公司 | Fresh air conditioner and control method thereof |
| CN114543176A (en) * | 2022-02-16 | 2022-05-27 | 青岛海信日立空调***有限公司 | Air conditioning equipment |
| CN114543176B (en) * | 2022-02-16 | 2023-04-18 | 青岛海信日立空调***有限公司 | Air conditioning equipment |
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