CN110345612B - Frost-prevention air-mixing energy-saving method for fresh air main unit - Google Patents

Frost-prevention air-mixing energy-saving method for fresh air main unit Download PDF

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Publication number
CN110345612B
CN110345612B CN201910527368.6A CN201910527368A CN110345612B CN 110345612 B CN110345612 B CN 110345612B CN 201910527368 A CN201910527368 A CN 201910527368A CN 110345612 B CN110345612 B CN 110345612B
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air
fresh air
fresh
inlet
opened
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CN110345612A (en
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王小梅
孙振同
王丽
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Nather Ventilation System Co ltd
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Nather Ventilation System Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/20Humidity
    • F24F2110/22Humidity of the outside air

Abstract

The invention discloses a frost-proof air mixing energy-saving method of a fresh air main machine, which comprises the following steps: detecting the current temperature of outdoor air through a temperature and humidity sensor; an external circulation mode: when the outdoor temperature is the proper temperature, the external circulation mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is closed, and a fresh air fan and an exhaust fan are opened; a wind mixing mode: when the outdoor temperature is lower temperature, the air mixing mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is opened, and a fresh air fan and an exhaust fan are started; an internal circulation mode: when the outdoor temperature is very cold temperature or very hot temperature, the internal circulation mode is started, and the air valve state is as follows: the air valve at the second fresh air inlet is closed, the air valve at the second return air inlet is opened, the fresh air fan is opened, and the exhaust fan is closed.

Description

Frost-prevention air-mixing energy-saving method for fresh air main unit
Technical Field
The invention belongs to the field of fresh air supply methods of fresh air hosts, and particularly relates to a frost-prevention air-mixing energy-saving method of a fresh air host.
Background
The fresh air host machine on the market at present comprises a case shell, a total heat exchange core body, a control device, a fresh air fan, an exhaust fan, a fresh air inlet, an exhaust outlet, a return air inlet and an air supply outlet, and if the application number is 2018203884671, the total heat exchange core body is arranged in the case shell and divides the case shell into four regions, and four exchange side surfaces of the total heat exchange core body are respectively communicated with one region; the fresh air inlet and the air outlet are arranged on one side of the case shell, and the return air inlet and the air supply outlet are arranged on the other side of the case shell; the fresh air inlet, the air outlet, the air return inlet and the air supply outlet correspond to the four areas respectively; the air exhaust fan is communicated with the air outlet, and the fresh air fan is communicated with the air supply outlet; the control device is arranged in the case shell, and no matter indoor air is discharged or outdoor air enters the room and passes through the full heat exchange core body, so that heat exchange is realized at the place, and the fresh air entering the room can receive heat of partial discharged air.
However, in the severe cold northern area, when the air conditioner operates below 0 ℃, outdoor fresh air directly enters the main machine and can be condensed, and the fresh air main machine can be frozen, so that the main machine is damaged. And a lot of fresh air manufacturers add anti-freezing measures in the fresh air control program, such as increasing outdoor temperature detection, and directly closing the fresh air when the outdoor temperature is lower than 0 ℃. However, the temperature of the northern area in winter is almost normal, and if the fresh air is directly closed, the significance of installing the fresh air fan is lost. Meanwhile, in a high-humidity environment in summer, when the outdoor temperature is higher than 36 ℃ or the humidity is higher than 85%, if fresh air is always started, the indoor temperature and humidity become higher and higher, and the indoor furniture is mildewed due to overhigh humidity.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for adjusting the working state of the fresh air host machine in time according to the outdoor temperature and humidity, so that the fresh air host machine always works in a normal temperature state, the interior of the fresh air host machine is prevented from being frozen, and the appropriate fresh air can be provided indoors.
In order to achieve the purpose, the invention provides the following technical scheme: a frost prevention and air mixing energy-saving method for a fresh air main machine comprises the following steps:
detecting the current temperature of outdoor air through a temperature and humidity sensor, and selecting the working mode of the fresh air host according to the outdoor temperature;
1) an external circulation mode: when the outdoor temperature is the proper temperature, the external circulation mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is closed, and a fresh air fan and an exhaust fan are opened;
2) a wind mixing mode: when the outdoor temperature is lower temperature, the air mixing mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is opened, and a fresh air fan and an exhaust fan are started;
3) an internal circulation mode: when the outdoor temperature is very cold temperature or very hot temperature, the internal circulation mode is started, and the air valve state is as follows: the air valve at the second fresh air inlet is closed, the air valve at the second return air inlet is opened, the fresh air fan is opened, and the exhaust air fan is closed.
Further, the suitable temperature is 0 ℃ and less than or equal to 36 ℃; the lower temperature is between minus 15 ℃ and outdoor temperature and between 0 ℃; the very cold temperature is < -15 ℃; the very hot temperature was >36 ℃.
And further selecting the working mode of the fresh air host according to the outdoor humidity, and starting the air mixing mode when the outdoor humidity is more than 85%.
Further in the air mixing mode, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the following proportion:
1) when the outdoor temperature is more than or equal to minus 3 ℃ and less than or equal to 0 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 5: 5;
2) when the outdoor temperature is less than or equal to minus 3 ℃ and less than 6 ℃, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the proportion of 6: 4;
3) when the outdoor temperature is less than or equal to minus 9 ℃ and less than minus 6 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 7: 3;
4) when the outdoor temperature is less than or equal to minus 12 ℃ and less than minus 9 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 8: 2;
5) when the outdoor temperature is less than or equal to 15 ℃ below zero and less than 12 ℃ below zero, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 9: 1.
Further in the air mixing mode, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the following proportion: when the outdoor humidity is more than 85%, the air valve at the second air return port and the air valve at the second fresh air port are opened according to the ratio of 9: 2.
In a further internal circulation mode, the internal circulation is started for 1 hour, and the air valve at the second fresh air inlet is opened for 5 minutes.
Compared with the prior art, the invention has the beneficial effects that: when the temperature is between-15 ℃ and-0 ℃, the air valve at the second fresh air inlet and the air valve at the second air return inlet are opened according to a certain proportion, and the low-temperature outdoor fresh air and the high-temperature indoor return air are mixed, so that the temperature of the fresh air entering the fresh air host machine can be ensured to be above 0 ℃, and the fresh air host machine can normally operate at the temperature between-15 ℃ and-0 ℃. And the internal circulation mode is started below-15 ℃ or above 36 ℃, and the air valve at the second fresh air inlet can be automatically opened for 5 minutes after the internal circulation is started for 1 hour, so that the oxygen content of indoor air is ensured, the heat exchange efficiency of the main machine is improved, the load of the household air conditioner is reduced, and the energy-saving effect is achieved.
Drawings
FIG. 1 is a perspective view of an anti-frost air mixing device of a fresh air main unit used in the present invention;
FIG. 2 is a top view of the anti-frost air mixing device of the fresh air main unit used in the present invention;
FIG. 3 is a schematic structural view of a split body of the fresh air main unit used in the present invention before being matched with the anti-frost air mixing device;
FIG. 4 shows the air supply and exhaust paths when the outdoor temperature is relatively suitable;
FIG. 5 shows the air supply and exhaust duct when the outdoor temperature is low or the humidity is high;
fig. 6 shows the air supply and exhaust duct when the outdoor temperature is too low or too high.
Reference numerals: 1. a wind mixing device; 10. a second housing; 101. an exhaust chamber; 102. a mixed air cavity; 103. a cover plate; 11. a second fresh air port; 12. a second air outlet; 13. a second air exhaust interface; 14. a second fresh air interface; 15. a wind mixing fan; 16. a second air return inlet; 17. an air valve; 18. a skirt edge; 19. a temperature and humidity sensor; 2. a fresh air host; 21. a first fresh air port; 22. a first exhaust port; 23. a first air supply outlet; 24. a first air return opening; 25. a total heat exchange core; 3. a water absorption filter screen.
Detailed Description
The embodiment of the anti-frost air-mixing energy-saving method of the fresh air host machine of the invention is further explained with reference to fig. 1 to 6.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.
As shown in fig. 1 to 3, the frost-proof air mixing device includes a second casing 10, a partition is provided in the second casing 10, the partition divides the inside of the second casing 10 into an air inlet chamber and an air outlet chamber 101, a second fresh air inlet 11, a second fresh air inlet 14 and a second air return inlet 16 are provided on the side wall of the second casing 10 corresponding to the air inlet chamber, a second air outlet 12 and a second air outlet 13 are provided on the side wall of the second casing 10 corresponding to the air outlet chamber 101, air valves 17 are provided on the second fresh air inlet 11 and the second air return inlet 16, a temperature and humidity sensor 19 is provided at the position of the second casing 10 corresponding to the second fresh air inlet 11, so as to detect the temperature and humidity of the outdoor air in real time.
In order to facilitate understanding of the present invention, and to distinguish from the structure of the present application, the structures of the fresh air host 2 in the prior art are respectively named as a first shell, a total heat exchange core 25, a control device, a fresh air blower, an exhaust air blower, a first fresh air opening 21, a first exhaust opening 22, a first air return opening 24, and a first supply opening 23.
When in use, the air mixing device 1 and the fresh air host 2 are connected to form a new fresh air host 2, and the specific connection mode is as follows: the second fresh air port 14 is connected with the first fresh air port 21, the second exhaust port 13 is connected with the first exhaust port 22, and the second return air port 16 is communicated indoors.
When the air mixing device 1 is installed, the air mixing device can be directly connected with the fresh air host 2 and installed indoors, and the second fresh air inlet 11 and the second air outlet 12 are connected outdoors through pipelines; it is also possible to arrange the air mixing device 1 outdoors, in which case the second return air inlet 16 is connected to the interior by a duct.
A water absorption filter screen 3 is arranged in the air inlet cavity corresponding to the second fresh air port 14, and the water absorption filter screen, the second fresh air port 11 and the second air return port 16 enclose a mixed air cavity 102; the shell is internally provided with a wind mixing fan 15 corresponding to the wind mixing cavity 102, and the wind mixing fan 15 can accelerate the uniform mixing of fresh wind and return wind.
The second fresh air interface 14 and the second air exhaust interface 13 are located on the same side of the second casing 10, a skirt 18 connected with the fresh air main unit 2 is arranged on the side face of the second casing 10 corresponding to the second fresh air interface, and the skirt 18 is connected with the fresh air main unit 2 through screws.
The filter screen that absorbs water can be dismantled with second casing 10 and be connected, corresponding filter screen department that absorbs water on second casing 10 has seted up and has got the opening of putting, gets to put opening and extend to second casing 10 is inside along being provided with the slide, and filter screen 3 that absorbs water installs in the slide, and it is provided with apron 103 to get the opening part at second casing correspondence.
As shown in fig. 4 to 6, a method for saving energy by mixing air and frost in a fresh air main unit 2 includes the following steps:
the current temperature of outdoor air is detected through a temperature and humidity sensor 19, and the working mode of the fresh air host machine 2 is selected according to the outdoor temperature;
1) an external circulation mode: when the outdoor temperature is the proper temperature, the external circulation mode is started, and the state of the air valve 17 is as follows: the air valve 17 at the second fresh air inlet 11 is opened, the air valve 17 at the second air return inlet 16 is closed, the fresh air fan and the exhaust fan are opened, as shown in fig. 4, at this time, fresh air enters the room through the air path a, and indoor air is exhausted through the air path b;
2) a wind mixing mode: when the outdoor temperature is lower temperature, the air mixing mode is started, and the state of the air valve 17 is as follows: the air valve 17 at the second fresh air inlet 11 is opened, the air valve 17 at the second air return inlet 16 is opened, and the fresh air fan and the exhaust fan are opened, as shown in fig. 5, outdoor fresh air enters the air inlet cavity from the second fresh air inlet 11, meanwhile, part of indoor air enters the air inlet cavity through the second air return inlet 16 (air path c) and is combined with the air path a, finally, the indoor air enters the room through the air path a, and part of indoor air is exhausted through the air path b;
3) an internal circulation mode: when the outdoor temperature is very cold temperature or very hot temperature, the internal circulation mode is started, and the air valve 17 is in a state: the air valve 17 at the second fresh air inlet 11 is closed, the air valve 17 at the second air return inlet 16 is opened, the fresh air fan is opened, the exhaust air fan is closed, as shown in fig. 6, indoor air enters the air inlet cavity through the second air return inlet 16 (air path c) to be combined with the air path a, finally enters the indoor through the air path a, and the exhaust is stopped.
The preferable suitable temperature of the embodiment is 0 ℃ and less than or equal to 36 ℃; the lower temperature is between minus 15 ℃ and outdoor temperature and between 0 ℃; the very cold temperature is < -15 ℃; the extreme heat temperature is more than 36 ℃, the temperature range can be finely adjusted, and the temperature can be floated up and down by 2-3 ℃.
The preferred operating mode of selecting new trend host computer 2 according to outdoor humidity of this embodiment, when outdoor humidity > 85%, open the mode of mixing wind.
In the air mixing mode, the air valve 17 at the second air return opening 16 and the air valve 17 at the second fresh air opening 11 are opened according to the following proportion:
1) when the outdoor temperature is more than or equal to 3 ℃ below zero and less than or equal to 0 ℃, the air valve 17 at the second air return port 16 and the air valve 17 at the second fresh air port 11 are opened according to the proportion of 5: 5;
2) when the outdoor temperature is less than or equal to minus 3 ℃ and less than 6 ℃, the air valve 17 at the second air return port 16 and the air valve 17 at the second fresh air port 11 are opened according to the proportion of 6: 4;
3) when the outdoor temperature is less than or equal to minus 6 ℃ and less than 9 ℃, an air valve 17 at the second air return port 16 and an air valve 17 at the second fresh air port 11 are opened according to the proportion of 7: 3;
4) when the outdoor temperature is less than or equal to 12 ℃ below zero and less than 9 ℃ below zero, the air valve 17 at the second air return port 16 and the air valve 17 at the second fresh air port 11 are opened according to the proportion of 8: 2;
5) when the outdoor temperature is less than or equal to 15 ℃ below zero and less than 12 ℃ below zero, the air valve 17 at the second air return port 16 and the air valve 17 at the second fresh air port 11 are opened according to the proportion of 9: 1.
In the air mixing mode, the air valve 17 at the second air return opening 16 and the air valve 17 at the second fresh air opening 11 are opened according to the outdoor humidity in the following proportion: when the outdoor humidity is more than 85%, the air valve 17 at the second air return opening 16 and the air valve 17 at the second fresh air opening 11 are opened according to the ratio of 9: 2.
In the preferred internal circulation mode of the embodiment, the internal circulation is started for 1 hour, and the air valve at the second fresh air inlet 11 is opened for 175 minutes to supplement the oxygen content in the chamber.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (5)

1. A frost-prevention air-mixing energy-saving method of a fresh air host comprises the fresh air host, wherein the fresh air host comprises a first shell, a total heat exchange core, a control device, a fresh air fan, an exhaust fan, a first fresh air inlet, a first exhaust port, a first return air inlet and a first supply air outlet; it is characterized by also comprising:
the frost-proof air mixing device comprises a second shell, wherein a partition plate is arranged in the second shell, the partition plate divides the interior of the second shell into an air inlet cavity and an air outlet cavity, a second fresh air inlet, a second fresh air interface and a second air return inlet are arranged on the side wall, corresponding to the air inlet cavity, of the second shell, a second air outlet and a second air outlet interface are arranged on the side wall, corresponding to the air outlet cavity, of the second shell, air valves are arranged on the second fresh air inlet and the second air return inlet, the second fresh air interface is connected with the first fresh air inlet, the second air outlet interface is connected with the first air outlet, and the second air return inlet is communicated indoors;
and comprises the following steps:
detecting the current temperature of outdoor air through a temperature and humidity sensor, and selecting the working mode of the fresh air host according to the outdoor temperature;
1) an external circulation mode: when the outdoor temperature is the proper temperature, the external circulation mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is closed, and a fresh air fan and an exhaust fan are opened;
2) a wind mixing mode: when the outdoor temperature is lower temperature, the air mixing mode is started, and the air valve state is as follows: an air valve at a second fresh air inlet is opened, an air valve at a second return air inlet is opened, and a fresh air fan and an exhaust fan are started;
3) an internal circulation mode: when the outdoor temperature is very cold temperature or very hot temperature, the internal circulation mode is started, and the air valve state is as follows: the air valve at the second fresh air inlet is closed, the air valve at the second return air inlet is opened, the fresh air fan is started, and the exhaust air fan is closed;
wherein the suitable temperature is: 0 ℃ and less than or equal to 36 ℃ of outdoor temperature; the lower temperature is as follows: the outdoor temperature is more than or equal to minus 15 ℃ and less than or equal to 0 ℃; very cold temperatures are: the outdoor temperature is less than-15 ℃; the very hot temperatures are: the outdoor temperature is >36 ℃.
2. The frost-proof air-mixing energy-saving method of the fresh air main machine according to claim 1, characterized in that: and selecting the working mode of the fresh air host according to the outdoor humidity, and starting the air mixing mode when the outdoor humidity is more than 85%.
3. The energy-saving method for preventing frost and mixing air of the fresh air main unit according to claim 2, characterized in that: in the air mixing mode, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the following proportion:
1) when the outdoor temperature is more than or equal to minus 3 ℃ and less than or equal to 0 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 5: 5;
2) when the outdoor temperature is less than or equal to minus 3 ℃ and less than 6 ℃, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the proportion of 6: 4;
3) when the outdoor temperature is less than or equal to minus 9 ℃ and less than minus 6 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 7: 3;
4) when the outdoor temperature is less than or equal to minus 12 ℃ and less than minus 9 ℃, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 8: 2;
5) when the outdoor temperature is less than or equal to 15 ℃ below zero and less than 12 ℃ below zero, the air valve at the second air return inlet and the air valve at the second fresh air inlet are opened according to the proportion of 9: 1.
4. The energy-saving method for preventing frost and mixing air of the fresh air main unit according to claim 3, characterized in that: in the air mixing mode, an air valve at a second air return port and an air valve at a second fresh air port are opened according to the following proportion: when the outdoor humidity is more than 85%, the air valve at the second air return port and the air valve at the second fresh air port are opened according to the ratio of 9: 2.
5. The energy-saving method for preventing frost and mixing air of the fresh air main unit according to claim 4, wherein: in the internal circulation mode, the internal circulation is started for 1 hour, and the air valve at the second fresh air port is opened for 5 minutes.
CN201910527368.6A 2019-06-18 2019-06-18 Frost-prevention air-mixing energy-saving method for fresh air main unit Active CN110345612B (en)

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US9513065B2 (en) * 2011-11-01 2016-12-06 Ruskin Company Energy recovery ventilation control system
CN105202654B (en) * 2015-09-02 2019-02-22 广东申菱环境系统股份有限公司 A kind of integral air conditioner unit and its control method applied to subway station
CN204987242U (en) * 2015-09-23 2016-01-20 上海兰舍空气技术有限公司 Novel remove new fan of haze
CN105890070B (en) * 2016-06-01 2018-09-28 江苏慧居建筑科技有限公司 The dehumidification fresh air group and air conditioning method of more condensers and double back wind bypass
CN108518764A (en) * 2018-03-15 2018-09-11 浙江盾安自控科技有限公司 A kind of combined air processing group air-supply humiture accuracy-control system and method
CN109737549B (en) * 2018-12-19 2020-09-18 广州西奥多电气设备有限公司 Multi-mode total heat exchange fresh air system and control method thereof

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