CN105928127A - Fresh air processing device - Google Patents

Fresh air processing device Download PDF

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Publication number
CN105928127A
CN105928127A CN201610452279.6A CN201610452279A CN105928127A CN 105928127 A CN105928127 A CN 105928127A CN 201610452279 A CN201610452279 A CN 201610452279A CN 105928127 A CN105928127 A CN 105928127A
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CN
China
Prior art keywords
straightway
fresh air
air
wind
handing
Prior art date
Application number
CN201610452279.6A
Other languages
Chinese (zh)
Other versions
CN105928127B (en
Inventor
苏起钦
詹朝永
余锐生
周伟峰
曾成
Original Assignee
珠海格力电器股份有限公司
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Priority to CN201610452279.6A priority Critical patent/CN105928127B/en
Publication of CN105928127A publication Critical patent/CN105928127A/en
Application granted granted Critical
Publication of CN105928127B publication Critical patent/CN105928127B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00Ventilation, e.g. by means of wall-ducts or systems using window or roof apertures
    • F24F7/007Ventilation, e.g. by means of wall-ducts or systems using window or roof apertures with forced flow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28Arrangement or mounting of filters

Abstract

The invention provides a fresh air processing device. The fresh air processing device comprises a box body (10) and a flow choking device (20), wherein the box body (10) comprises a first air inlet (11), a first air outlet (12) and a fresh air passage which communicates with the first air inlet (11) and the first air outlet (12); the flow choking device (20) is arranged on the fresh air passage and is used for choking water vapor or rain. By adopting the fresh air processing device disclosed by the invention, the problem that the fresh air processing device in the prior art is poor in waterproofness can be solved.

Description

Fresh air handing device

Technical field

The present invention relates to household appliance technical field, in particular to a kind of Fresh air handing device.

Background technology

At present, along with the raising of people's living standard, the requirement to IAQ (indoor air quality) is more and more higher.Currently, on market The equipment such as substantial amounts of air conditioner or fresh air processor are had to be capable of the function of new wind outside indoor conveying chamber.But, due to outdoor Environment is the most changeable, in order to ensure that the new wind introduced from outdoor has good air quality and ensure that unit is long-time Stable operation, it is therefore desirable to Fresh air handing device possesses the waterproof and feature of lower resistance.

But, Most current Fresh air handing device does not all consider the waterproof and demand of lower resistance when being designed, and therefore makes Used time, when running into thunderstorm weather, fail to carry out good rainproof, thus while introducing new wind, substantial amounts of rainwater is sucked. Furthermore, owing to failing to consider the demand of lower resistance, the most operationally there is the problem that noise is big.

Summary of the invention

The present invention provides a kind of Fresh air handing device, to solve the technical problem of Fresh air handing device water proofing property of the prior art difference.

The invention provides a kind of Fresh air handing device, including: casing, there is the first air inlet and the first air outlet and connection First air inlet and the fresh air channel of the first air outlet;Choke apparatus, is arranged in fresh air channel, and choke apparatus is used for intercepting water Vapour or rainwater.

Further, choke apparatus is wind blade, and wind blade is used for the Leads to new breeze fresh air channel of the first air inlet, Wind blade has resistive portion, and resistive portion is used for preventing steam or rainwater from flowing out from the first air outlet with new wind.

Further, wind blade includes the first straightway, arc section and the second straightway being sequentially connected with along air intake direction, resistance Stream portion includes arc section and the second straightway.

Further, the first straightway is tangent with one end of arc section, and the second straightway is tangent with the other end of arc section.

Further, wind blade is multiple, and in top plan view, multiple wind blades are arranged side by side, adjacent two wind guide vanes There is between sheet interval.

Further, in adjacent two wind blades, the free end of the second straightway of one of them wind blade arrives another The distance of the first straightway of wind blade is oblique distance, and oblique distance meets: 0≤a≤0.3d, and wherein, a is oblique distance, D is the spacing of two adjacent wind blade the first straightways.

Further, in the vertical direction, the free end of the first straightway of this wind blade of distance on the arc section of wind blade The longest point of distance is basic point, in adjacent two wind blades, and the free end institute of the first straightway of one of them wind blade Horizontal line and another wind blade arc section basic point place horizontal line between distance be vertical distance, vertical away from From meeting: 0≤b≤0.3d, wherein, b is vertical distance.

Further, the first straightway is θ with horizontal angle in the counterclockwise direction, 40 ° of < θ < 60 °.

Further, a length of L of the first straightway1, a length of L of the second straightway2, the length of the first straightway and second The length of straightway meets: 3L2< L1< 5L2

Further, wind blade is made up of one or more snippets arc section.

Further, casing also have the second air inlet and the second air outlet and connection the second air inlet and the second air outlet return Wind passage.

Further, Fresh air handing device includes that two choke apparatus, two choke apparatus are separately positioned on fresh air channel and return air In passage.

Further, Fresh air handing device also includes current collector, current collector and the first air outlet and the second air inlet one-piece construction.

Further, Fresh air handing device also includes being provided with grid at grid, the first air inlet and the second air outlet.

Application technical scheme, by arranging choke apparatus such that it is able to enter by outdoor on Fresh air handing device The indoor steam in new wind and rainwater filter, thus realize a kind of waterproof Fresh air handing device.

Accompanying drawing explanation

The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 shows the structural representation of the Fresh air handing device provided according to embodiments of the present invention;

Fig. 2 shows the top view of the Fresh air handing device provided according to embodiments of the present invention;

Fig. 3 shows the structural representation of one of them embodiment of the wind blade provided according to embodiments of the present invention;

Fig. 4 shows the structural representation of the grid provided according to embodiments of the present invention;

Fig. 5 shows the structural representation of another embodiment of the wind blade provided according to embodiments of the present invention.

Wherein, above-mentioned accompanying drawing includes the following drawings labelling:

10, casing;11, the first air inlet;12, the first air outlet;13, the second air inlet;14, the second air outlet;20、 Choke apparatus;21, the first straightway;22, arc section;23, the second straightway;24, the first blade tip;25, the second blade tip; 30, grid;40, current collector;51, the first circular arc;52, the second circular arc;A, oblique distance;B, vertical distance;D, two The spacing of adjacent wind blade the first straightway;θ, the first straightway in the counterclockwise direction with horizontal angle;L1, first straight The length of line segment;L2, the length of the second straightway.

Detailed description of the invention

It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined. Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.

As it is shown in figure 1, the invention provides a kind of Fresh air handing device, including casing 10, there is the first air inlet 11 and the One air outlet 12 and connection the first air inlet 11 and fresh air channel of the first air outlet 12;Choke apparatus 20, is arranged on new wind On passage, choke apparatus 20 is used for intercepting steam or rainwater.

By arranging choke apparatus 20 on Fresh air handing device, when outdoor is thunderstorm weather, by entering at the first air inlet 11 Rainwater can be removed by rainwater contained in the new wind entered when stream is through choke apparatus 20, therefore can realize Fresh air handing device Except water function.

Further, choke apparatus 20 is wind blade, and wind blade is for leading to the new wind of Leads to new breeze at the first air inlet 11 Road, wind blade has resistive portion, and resistive portion is used for preventing steam or rainwater from flowing out from the first air outlet 12 with new wind.Wind guide vane Sheet includes the first straightway 21, arc section 22 and the second straightway 23 being sequentially connected with along air intake direction, and resistive portion includes circular arc Section 22 and the second straightway 23.First straightway 21 is tangent with one end of arc section 22, the second straightway 23 and arc section 22 The other end tangent.

Designed by the above-mentioned structure to wind blade, can make by the first air inlet 11 can not be straight containing the rainwater in the new wind of rain Tap in the cavity of Fresh air handing device.Reason is, due to the construction features of wind blade, it makes Fresh air handing device inhale The steam being mingled with in the air-flow entered could enter the cavity of Fresh air handing device after having to pass through the passage constituted between two wind blades In.Owing to wind blade is made up of the first straightway 21, arc section 22 and the second straightway 23, it is straight that arc section 22 connects first Line segment 21 and the second straightway 23, and arc section 22 has the effect turned to, therefore wind blade is to by the gas of fresh air channel Stream has obvious barrier effect, it is achieved that the effect that steam separates, thus more effectively prevents and be mingled with aerial rainwater It is inhaled into indoor.

For the relation between denseness and rainproof effect and the resistance of wind blade, owing to wind blade denseness is the least, resistance is more Little, and denseness is the least, rainproof effect is the poorest, therefore, it is necessary to the shape of appropriate design blade and denseness so that wind blade has There is less resistance and there is good rainwater-proof effect.

Further, choke apparatus 20 includes multiple described wind blade, and in top plan view, multiple wind blades are arranged side by side, There is between adjacent two wind blades interval, and in adjacent two wind blades, the second straight line of one of them wind blade The free end of section 23 is oblique distance to the distance of the first straightway 21 of another wind blade, and oblique distance meets: 0≤a ≤ 0.3d, wherein, a is oblique distance, and d is the spacing of two adjacent wind blade the first straightways.

Further, in the vertical direction, on the arc section 22 of wind blade the first straightway 21 of distance wind blade from By end distance the longest point be basic point, in adjacent two wind blades, the first straightway 21 of one of them wind blade from By the distance between the horizontal line at the end horizontal line at place and the basic point place of the arc section 22 of another wind blade be vertical away from From, vertical distance meets: 0≤b≤0.3d, wherein, b is vertical distance.

Specifically, the passage constituted between wind blade meets vertical coincidence and oblique coincidence, as shown in Figure 2.Wherein, hang down Refer to coincidence: when the first blade tip 24 of one of them wind blade is positioned at below another wind blade adjacent, the of wind blade There is vertical distance b in vertical direction, as shown in Figure 3 in one blade tip and arc section peak;Oblique coincidence refers to: cross another Second blade tip 25 of wind blade does the straight line of first straightway 21 being parallel to another wind blade adjacent, the straight line done It is positioned at the lower section of the first straightway 21 of adjacent wind blade, between this straight line and the first straightway 21, there is oblique distance.

In this embodiment, a length of L of the first straightway 21 of wind blade1, a length of L of the second straightway 232, the The length of one straightway 21 meets with the length of the second straightway 23: 3L2< L1< 5L2

Further, the first straightway 21 is θ with horizontal angle in the counterclockwise direction, 40 ° of < θ < 60 °.

As another embodiment, wind blade can be made up of one or more snippets arc section.Fig. 5 shows that wind blade is by first The version that circular arc 51 and the second circular arc 52 are constituted.Wherein the first circular arc 51 is tangent with the second circular arc 52, and new wind from After first air inlet 11 enters, after the first circular arc 51 and the second circular arc 52, enter the first air outlet 12.Wherein new containing rain Wind is through the first circular arc 51 and the tangent of the second circular arc 52, owing to both have replicated structures in the tangent, newly Wind is when by wind blade, and wind blade has obvious barrier effect to by the air-flow of fresh air channel, it is achieved that steam separates Effect, thus more effectively prevent and be mingled with aerial rainwater and be inhaled into indoor.

Further, casing also has the second air inlet 13 and the second air outlet 14 and connects the second air inlet 13 and second and go out The return air channel in air port 14.Return air channel can introduce outside indoor air discharge chamber while new wind in fresh air channel, thus Reach stablizing of room pressure.

Further, Fresh air handing device includes two choke apparatus 20, two choke apparatus 20 be separately positioned on fresh air channel and In return air channel.By being respectively provided with choke apparatus 20 in fresh air channel and return air channel, it is possible to effectively to from outdoor entrance Steam in indoor new wind, and the air from indoor discharge chamber intercepts.

Further, can arrange dedusting choke apparatus at the first air inlet 11, dedusting choke apparatus can be to from outdoor entrance The new wind of fresh air channel carries out dust removal and filtration;Furthermore, at the second air inlet 13, may also set up dedusting choke apparatus, dedusting choked flow Device can carry out dust removal and filtration to the wind from indoor entrance return air channel.

In the present embodiment, Fresh air handing device also includes: current collector 40, and current collector 40 enters with the first air outlet 12 and second Air port 13 one-piece construction.Current collector 40 and the first air outlet 12 and the second air inlet 13 one-piece construction can be improved newly The compactedness of wind processing means, makes this Fresh air handing device have less overall dimensions.Furthermore, by setting up integral type afflux Device can be obviously reduced the local resistance loss at the first air outlet 12 and the second air inlet 13, thus further reduces new wind The resistance of processing means.

Further, Fresh air handing device also includes grid 30, as shown in Figure 5.Specifically, at the first air inlet 11 and second Grid 30 it is provided with at air outlet 14.

In order to have a better understanding of the present invention, below to the Fresh air handing device of the present invention work side when transition season in spring and autumn Formula is described in detail.

When needs are to the new wind of indoor conveying, under the effect of air-supply power set, outdoor new wind enters from the first air inlet 11 Fresh air channel, can be provided with filter dust removal and filtration at the first air inlet 11 of fresh air channel, and new wind is through filter dedusting Filter.

New wind, after dust removal and filtration completes, enters wind blade, and wind blade is by the first straightway 21, arc section 22 and second Straightway 23 is constituted, and new wind first passes through the first straightway 21, is then passed through arc section 22, finally enters the second straightway 23. When outdoor is thunderstorm weather, Fresh air handing device containing rain in the air sucked, containing the new wind of rain through the first straightway 21, when arc section 22 finally enters the second straightway 23, owing to arc section 22 is straight as connecting the first straightway 21 and second The turning point of line segment 23, rainwater be stopped by its meeting, and air then can enter the second straightway 23 smoothly.

Therefore, when the new wind containing rain is after wind blade, and rainwater is filtered, thus ensure that in the new wind entering indoor and do not contain Rainwater, the new wind after final removal rainwater enters room area by the first air outlet 12 at current collector.

Meanwhile, when return air, under the effect of air draft power set, the room air the second air inlet at current collector 40 13 enter return air channel, can be provided with filter dust removal and filtration at the second air inlet 13 of return air channel, and room air passes through Filter dust removal and filtration.After room air dust removal and filtration completes, enter wind blade, finally enter second via wind blade Air outlet 14.

Further understand in order to the present invention is had, it is possible to this Fresh air handing device is used as air conditioner and uses, below to this The bright Fresh air handing device working method when season of summer and winter is described in detail.

When this Fresh air handing device runs at cooling in summer, under the effect of air-supply power set, the new wind of outdoor high temperature high humidity Enter fresh air channel from the first air inlet 11, filter dust removal and filtration can be provided with at the first air inlet 11 of fresh air channel, New wind is through filter dust removal and filtration.

New wind, after dust removal and filtration completes, enters wind blade, and wind blade is by the first straightway 21, arc section 22 and second Straightway 23 is constituted, and new wind first passes through the first straightway 21, is then passed through arc section 22, finally enters the second straightway 23. When outdoor is thunderstorm weather, Fresh air handing device containing rain in the air sucked, containing the new wind of rain through the first straightway 21, when arc section 22 finally enters the second straightway 23, owing to arc section 22 is straight as connecting the first straightway 21 and second The turning point of line segment 23, rainwater be stopped by its meeting, and air then can enter the second straightway 23 smoothly.

Therefore, when the new wind containing rain is after wind blade, and rainwater is filtered, thus ensure that in the new wind entering indoor and do not contain Rainwater, then new wind passes sequentially through the first heat-exchanger rig and lowers the temperature, after reaching the temperature that user sets, finally by current collector The first air outlet 12 at 40 enters room conditioning region.

Meanwhile, when return air, under the effect of air draft power set, the room air the second air inlet at current collector 40 13 enter return air channel, can be provided with filter dust removal and filtration at the second air inlet 13 of return air channel, and room air passes through Filter dust removal and filtration.After room air dust removal and filtration completes, enter wind blade, then heated up by the second heat-exchanger rig, Finally drain into outdoor via the second air outlet 14.Second heat-exchanger rig is used as condenser, and the second heat-exchanger rig is by indoor low temperature return air Condensation, the cold in indoor low temperature return air is recycled, and reduces the condensation temperature of whole Fresh air handing device.

When this Fresh air handing device heating operation in the winter time, under the effect of air-supply power set, the new wind of outdoor low temperature is from the One air inlet 11 enters fresh air channel, can be provided with filter dust removal and filtration, new wind at the first air inlet 11 of fresh air channel Through filter dust removal and filtration.

New wind, after dust removal and filtration completes, enters wind blade, and wind blade is by the first straightway 21, arc section 22 and second Straightway 23 is constituted, and new wind first passes through the first straightway 21, is then passed through arc section 22, finally flows through the second straightway 23. When outdoor is thunderstorm weather, Fresh air handing device containing rain in the air sucked, containing the new wind of rain through the first straightway 21, when arc section 22 finally enters the second straightway 23, owing to arc section 22 is straight as connecting the first straightway 21 and second The turning point of line segment 23, rainwater be stopped by its meeting, and air then can enter the second straightway 23 smoothly.

Therefore, when the new wind containing rain is after wind blade, and rainwater is filtered, thus ensure that in the new wind entering indoor and do not contain Rainwater, then new wind passes sequentially through the first heat-exchanger rig and heats up, after reaching the temperature that user sets, finally by current collector The first air outlet 12 at 40 enters room conditioning region.

Meanwhile, when return air, under the effect of air draft power set, the room air the second air inlet at current collector 40 13 enter return air channel, can be provided with filter dust removal and filtration at the second air inlet 13 of return air channel, and room air passes through Filter dust removal and filtration.After room air dust removal and filtration completes, enter wind blade, then by the second heat-exchanger rig cooling, Finally drain into outdoor via the second air outlet 14.Second heat-exchanger rig is used as vaporizer, and the second heat-exchanger rig is by indoor high temperature return air Evaporation, the heat in indoor high temperature return air is recycled, and improves the evaporating temperature of whole Fresh air handing device.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc. With replacement, improvement etc., should be included within the scope of the present invention.

Claims (14)

1. a Fresh air handing device, it is characterised in that including:
Casing (10), has the first air inlet (11) and the first air outlet (12) and connects described first air inlet (11) Fresh air channel with described first air outlet (12);
Choke apparatus (20), is arranged in described fresh air channel, and described choke apparatus (20) is used for intercepting steam or rainwater.
Fresh air handing device the most according to claim 1, it is characterised in that described choke apparatus (20) is wind blade, Described wind blade is for by fresh air channel described in the Leads to new breeze at described first air inlet (11) place, and described wind blade has Resistive portion, described resistive portion is had to be used for preventing described steam or described rainwater with described new wind from described first air outlet (12) Flow out.
Fresh air handing device the most according to claim 2, it is characterised in that described wind blade includes along air intake direction sequentially The first straightway (21), arc section (22) and the second straightway (23) connected, described resistive portion includes described circular arc Section (22) and described second straightway (23).
Fresh air handing device the most according to claim 3, it is characterised in that described first straightway (21) and described circular arc One end of section (22) is tangent, and described second straightway (23) is tangent with the other end of described arc section (22).
Fresh air handing device the most according to claim 3, it is characterised in that described wind blade is multiple, in top plan view On, multiple described wind blades are arranged side by side, and have interval between adjacent two described wind blades.
Fresh air handing device the most according to claim 5, it is characterised in that in adjacent two described wind blades, wherein The free end of second straightway (23) of one described wind blade is to first straightway (21) of wind blade another described Distance be oblique distance, described oblique distance meets: 0≤a≤0.3d, and wherein, a is oblique distance, and d is two adjacent The spacing of wind blade the first straightway.
Fresh air handing device the most according to claim 6, it is characterised in that in the vertical direction, the circle of described wind blade The free end the longest point of distance of first straightway (21) of upper this wind blade of distance of segmental arc (22) is basic point, in phase In adjacent two wind blades, the horizontal line at the free end place of first straightway (21) of one of them described wind blade And the distance between the horizontal line at the described basic point place of the arc section (22) of another described wind blade is vertical distance, Described vertical distance meets: 0≤b≤0.3d, wherein, b is vertical distance.
Fresh air handing device the most according to claim 7, it is characterised in that described first straightway (21) is in side counterclockwise To being θ with horizontal angle, 40 ° of < θ < 60 °.
Fresh air handing device the most according to claim 3, it is characterised in that a length of L of described first straightway (21)1, The a length of L of described second straightway (23)2, the length of described first straightway (21) and described second straightway (23) Length meet:
3L2< L1< 5L2
Fresh air handing device the most according to claim 2, it is characterised in that described wind blade is by one or more snippets arc section Constitute.
11. Fresh air handing devices according to any one of claim 1 to 10, it is characterised in that described casing (10) also has There are the second air inlet (13) and the second air outlet (14) and connect described second air inlet (13) and described second and go out The return air channel in air port (14).
12. Fresh air handing devices according to claim 11, it is characterised in that described Fresh air handing device includes two described resistances Stream device (20), two described choke apparatus (20) are separately positioned in described fresh air channel and described return air channel.
13. Fresh air handing devices according to claim 11, it is characterised in that described Fresh air handing device also includes: current collector (40), described current collector (40) and described first air outlet (12) and described second air inlet (13) one-piece construction.
14. Fresh air handing devices according to claim 11, it is characterised in that described Fresh air handing device also includes grid (30), Described first air inlet (11) and described second air outlet (14) place are provided with described grid (30).
CN201610452279.6A 2016-06-20 2016-06-20 Fresh air handing device CN105928127B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610452279.6A CN105928127B (en) 2016-06-20 2016-06-20 Fresh air handing device

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Application Number Priority Date Filing Date Title
CN201610452279.6A CN105928127B (en) 2016-06-20 2016-06-20 Fresh air handing device

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CN105928127B CN105928127B (en) 2019-10-25

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2465439Y (en) * 2000-06-10 2001-12-12 深圳市泰尔卡科技有限公司 High-efficient water-proof ventilation structure
US20030050006A1 (en) * 2001-09-11 2003-03-13 Myint Tom H. Security air vent
CN202419877U (en) * 2011-12-16 2012-09-05 成都英德生物工程有限公司 Fresh air box
CN202630335U (en) * 2012-06-01 2012-12-26 中国石油化工集团公司 Rainproof sand-stop grille air port
CN203893367U (en) * 2014-06-26 2014-10-22 于志强 Double-circulation fresh-air machine
EP2982909A1 (en) * 2014-08-08 2016-02-10 Ventive Limited A cowl for a ventilation system
CN205747310U (en) * 2016-06-20 2016-11-30 珠海格力电器股份有限公司 Fresh air handing device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2465439Y (en) * 2000-06-10 2001-12-12 深圳市泰尔卡科技有限公司 High-efficient water-proof ventilation structure
US20030050006A1 (en) * 2001-09-11 2003-03-13 Myint Tom H. Security air vent
CN202419877U (en) * 2011-12-16 2012-09-05 成都英德生物工程有限公司 Fresh air box
CN202630335U (en) * 2012-06-01 2012-12-26 中国石油化工集团公司 Rainproof sand-stop grille air port
CN203893367U (en) * 2014-06-26 2014-10-22 于志强 Double-circulation fresh-air machine
EP2982909A1 (en) * 2014-08-08 2016-02-10 Ventive Limited A cowl for a ventilation system
CN205747310U (en) * 2016-06-20 2016-11-30 珠海格力电器股份有限公司 Fresh air handing device

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