CN213383797U

CN213383797U - Air outlet wind direction adjusting structure

Info

Publication number: CN213383797U
Application number: CN202021785910.2U
Authority: CN
Inventors: 库陈宗; 陆海芳
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-06-08
Anticipated expiration: 2030-08-24

Abstract

The utility model provides an air outlet wind direction is adjusted structure for adjust the air-out direction that forms the air outlet on the air-out casing, be equipped with the vertical air damper who carries out the vertical regulation of wind direction in the air outlet at least to and carry out the horizontal air damper that the wind direction transversely adjusted, just air outlet wind direction is adjusted the structure include in one side of air outlet sets up the first wind direction adjusting part on the air-out casing, first wind direction adjusting part constitutes respectively and is connected with the transmission of vertical air damper and horizontal air damper to because of accepting outside along vertical or horizontal operating force, and can order about vertical air damper or the upset of horizontal air damper in order to adjust the air-out direction. The utility model discloses an air outlet wind direction adjustment structure sets up in one side of air outlet through the adjusting part that will be used for the wind direction horizontal and vertical regulation, compares in the current form that sets up that is located air outlet blade middle part, can make the air-out adjust the structure and have the bright spot, and promotes its aesthetic impression.

Description

Air outlet wind direction adjusting structure

Technical Field

The utility model relates to an air conditioner air-out adjusts technical field, in particular to structure is adjusted to air outlet wind direction.

Background

At present, the traditional wind direction adjusting structures for the air outlet of the automobile air conditioner are all the same and different, and generally rotate by a toggle button which spans on a blade or slide along the blade to adjust the wind direction, and simultaneously adjust the opening and closing of an air door and the opening of the air door through the rotation of a thumb wheel. Besides the traditional manual adjusting structure, the electric adjusting air outlet is also used in some high-grade automobiles, and the air outlet direction can be automatically adjusted according to keys or voice signals.

For the traditional air outlet adjusting structure, the arrangement form is fixed, and no bright spot exists on the structure, so that the aesthetic fatigue is easily caused. And for the electric adjusting structure, the cost is higher, and the electric adjusting structure does not have the basis of a large amount of applications. Therefore, there is a need to develop a new air outlet adjusting structure with lower cost and bright spots.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an air outlet wind direction adjusting structure to can make the air-out adjust the structure and have certain bright spot, and help promoting its aesthetic feeling.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides an air outlet wind direction is adjusted structure for adjust the air-out direction that forms the air outlet on the air-out casing, be equipped with the vertical air damper who carries out the vertical regulation of wind direction in the air-out at least to and carry out the horizontal air damper that the wind direction transversely adjusted, just air outlet wind direction is adjusted the structure include in one side setting of air outlet is in first wind direction adjusting part on the air-out casing, first wind direction adjusting part constitute respectively with vertical air damper reaches horizontal air damper's transmission is connected to because of accepting outside vertical or horizontal operating force along, and can order about vertical air damper or horizontal air damper upset is in order to adjust the air-out direction.

Further, first wind direction adjusting part locates including rotating plectrum base on the air-out casing to and be restricted in plectrum panel on the plectrum base, the plectrum panel can for plectrum base lateral sliding, and can drive the synchronous vertical upset of plectrum base, just the plectrum base with vertical air damper transmission is connected, the plectrum panel with the transmission links to each other between the lateral air damper.

Furthermore, one end of the plectrum base is provided with a transmission tooth part, one end of the vertical air damper is provided with a matching tooth part, and the transmission tooth part is meshed with the matching toothed plate to form transmission connection between the plectrum base and the vertical air damper.

Furthermore, in it is equipped with the drive shift fork to rotate on the air-out casing, the one end of drive shift fork with the plectrum panel transmission is connected, in order to can follow the lateral sliding of plectrum panel and reciprocating rotation, and for with the one end that the plectrum panel links to each other, the other end of drive shift fork pass through the connecting rod unit with the transmission of horizontal air damper links to each other, and follows the rotation of drive shift fork, horizontal air damper because of the transmission of connecting rod unit can transversely overturn.

Further, in the plectrum base is last to be constructed the transversely arranged and to inlay the dress mouth, and in the inboard of plectrum base is equipped with transversely arranged inlay the guide strip of dress mouth both sides, just the inboard of plectrum panel is equipped with to inlay and locates inlay the intraoral connecting seat of dress, in be equipped with respectively corresponding to both sides on the connecting seat the trip that the guide strip arranged, the plectrum panel because of the trip in hook on the guide strip and the card is arranged in on the plectrum base to can have the edge the direction of guide strip slides.

Furthermore, a panel slot and a connecting rod slot are respectively formed in the plectrum panel and the connecting rod unit, a first shifting fork rod and a second shifting fork rod are arranged on the driving shifting fork and are respectively arranged at two opposite ends, the first shifting fork rod is slidably embedded in the panel slot, and the second shifting fork rod is slidably embedded in the connecting rod slot.

Furthermore, the connecting rod unit comprises a first connecting rod, a second connecting rod and a middle connecting rod, wherein one end of the first connecting rod is provided with the connecting rod slot, one end of the second connecting rod is hinged and connected with the transverse air damper, and the middle connecting rod is hinged and connected between the other end of the first connecting rod and the other end of the second connecting rod.

Further, the air outlet is including locating last wind gap of blowing and the wind gap of blowing down on the air-out casing, vertical air damper is located the intersection of going up the wind gap of blowing with the wind gap of blowing down, in order to adjust go up the wind gap of blowing with the aperture of wind gap of blowing down, horizontal air damper has and is located respectively go up the wind gap of blowing with the wind gap of blowing down in air damper and the air door of blowing down.

Furthermore, still be equipped with in the air outlet and be located horizontal air damper reaches the air regulation air door on vertical air damper upper reaches, and for first wind direction adjusting part, in the air outlet opposite side be equipped with on the air-out casing with the air regulation air door transmission is connected, in order to order about the second adjusting part of air regulation air door upset.

Furthermore, the second adjusting component comprises a knob which is rotatably arranged on the air outlet casing, a transmission rod which is arranged in the air outlet casing in a sliding manner is arranged in the air outlet casing, the transmission rod is respectively in meshed transmission with the knob and the air volume adjusting air door, and the knob is used for driving the air volume adjusting air door to turn over.

Compared with the prior art, the utility model discloses following advantage has:

air outlet wind direction adjust structure, set up in one side of air outlet through the adjusting part that will be used for the wind direction horizontal and vertical regulation, compare in the current form that sets up that is located air outlet blade middle part, can make air outlet wind direction adjust structure have the bright spot, and can promote its aesthetic impression.

In addition, link to each other through meshing form and vertical damper, link to each other through connecting rod unit and horizontal damper, simple structure, easily manufacturing and assembly, and first wind direction adjusting part adopts the combination form of plectrum panel and plectrum base to utilize the drive shift fork to realize the drive to the connecting rod unit, same simple structure does benefit to manufacturing and designing. And the second adjusting component which is also positioned at the other side of the air outlet is adopted to drive and control the air quantity adjusting air door, so that the integral aesthetic feeling of the air outlet adjusting structure can be further improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of an air outlet wind direction adjusting structure according to an embodiment of the present invention;

FIG. 2 is a rear view of FIG. 1;

fig. 3 is a schematic view of the inside of the air outlet according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first wind direction adjusting assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a plectrum panel according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a pick base according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a driving fork according to an embodiment of the present invention;

fig. 8 is a schematic transmission diagram of the first wind direction adjusting assembly, the vertical damper and the horizontal damper according to the embodiment of the present invention;

FIG. 9 is a schematic view of a portion of the structure of FIG. 8;

fig. 10 is a schematic structural view of an air quantity adjusting damper according to an embodiment of the present invention;

fig. 11 is a schematic transmission diagram of a second adjusting assembly and an air quantity adjusting damper according to an embodiment of the present invention;

description of reference numerals:

1-an air outlet shell, 2-an upper air blowing opening, 3-a lower air blowing opening, 4-an air duct, 5-a plectrum panel, 6-a knob, 7-a decorative plate, 8-a fixed seat, 9-a transmission rod, 10-an upper air blowing air door, 11-a lower air blowing air door, 12-an air inlet, 13-an air volume adjusting air door, 14-a transmission gear, 15-a vertical adjusting air door, 16-a plectrum base, 17-a driving shifting fork, 18-a transmission shaft rod, 19-a first connecting rod, 20-a second connecting rod and 21-a middle connecting rod;

501-panel body, 502-connecting seat, 503-trip, 504-panel slot and 505-shifting block;

1601-a base body, 1602-a first rotating shaft, 1603-a second rotating shaft, 1604-a transmission tooth part, 1605-an embedding opening, 1606-a guide bar and 1607-a notch;

1701-fork body, 1702-mounting shaft, 1703-first fork lever, 1704-second fork lever.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

And simultaneously, the utility model discloses in horizontal regulation and vertical regulation, also indicate that so-called wind direction is adjusted from side to side and is adjusted from top to bottom in the air-out of general vehicle air conditioner is adjusted.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to an air outlet wind direction adjusting structure, which is generally applied to an automobile air conditioning system to adjust the air outlet direction of an air outlet formed on an air outlet shell, and the embodiment also adjusts the structure through the adjusting structure, so that the air outlet wind direction adjusting structure has bright points, and the aesthetic feeling of the air outlet wind direction adjusting structure can be improved.

In the overall design, as shown in fig. 1 and fig. 2 in combination with fig. 3, as an exemplary implementation form of the air outlet wind direction adjusting structure of this embodiment, a vertical damper 15 for vertically adjusting the wind direction and a horizontal damper for horizontally adjusting the wind direction are provided in the air outlet of this embodiment, and the air outlet liquid specifically includes an up-blowing wind gap 2 and a down-blowing wind gap 3 provided on the air outlet casing 1, and the vertical damper 15 is located at the intersection of the up-blowing wind gap 2 and the down-blowing wind gap 3 to adjust the opening degree of the up-blowing wind gap 2 and the down-blowing wind gap 3, and the above-mentioned horizontal damper has an up-blowing wind gap 10 and a down-blowing wind gap 11 respectively located in the up-blowing wind gap 2 and the down-blowing wind gap 3.

In addition, in addition to the vertical damper 15 and the horizontal damper composed of the upper air blowing damper 10 and the lower air blowing damper 11, an air volume damper 13 located upstream of the horizontal damper and the vertical damper 15 is further provided in the air outlet of the present embodiment. The air quantity adjusting damper 13 is used for adjusting the air quantity entering the air outlet through the air duct 4, and meanwhile, the air quantity adjusting damper 13 is also used for controlling the opening and closing of the outlet air of the air outlet.

Based on the setting of the above-mentioned intraoral damper of air outlet, this embodiment air outlet wind direction adjustment structure also includes the first wind direction adjusting part that sets up on air-out casing 1 in one side of air outlet, this first wind direction adjusting part is in the design respectively with vertical damper 15 and horizontal damper's transmission is connected to when it accepts outside along vertical or horizontal operating force, and can order about vertical damper 15 or horizontal damper upset in order to adjust the air-out direction.

As an exemplary structure, as shown in fig. 4, the first wind direction adjusting assembly of the present embodiment includes a plectrum base 16 rotatably disposed on the air outlet casing 1, and a plectrum panel 5 constrained on the plectrum base 16. Plectrum panel 5 can be for plectrum base 16 lateral sliding to can drive plectrum base 16 synchronous vertical upset, and plectrum base 16 specifically be connected with vertical air damper 15 transmission promptly, and plectrum panel 5 then links to each other with the transmission between the horizontal air damper.

In addition, in the present embodiment, a driving fork 17 is also rotatably disposed on the air outlet casing 1, and one end of the driving fork 17 is in transmission connection with the plectrum panel 5 so as to be capable of reciprocating rotation along with the lateral sliding of the plectrum panel 5. The other end of the driving fork 17 is set to be in transmission connection with the transverse damper through the link unit with respect to the end connected with the plectrum panel 5, so that the transverse damper can be turned over transversely due to the transmission of the link unit with the rotation of the driving fork 17.

Specifically, the dial plate 5 has an arc-shaped plate body 501, as shown in fig. 5, a connecting seat 502 is provided on the inner side of the plate body 501, and a dial 505 is provided on the outer side of the plate body 501. The connecting sockets 502 are two connecting sockets 502 arranged at intervals, each connecting socket 502 is also provided with a convex hook 503, and meanwhile, a panel slot 504 in a notch shape is further arranged between the two connecting sockets 502 in the embodiment.

Fig. 6 shows a structure of the paddle base 16 of the present embodiment, which is also embodied as a base body 1601, and the base body 1601 is composed of a middle portion, which is also arc-shaped, and end portions integrally connected to both ends. A through insertion opening 1605 is provided in the middle part, and guide strips 1606 arranged transversely are also formed on both sides of the insertion opening 1605 on the inner side of the pusher base 16. Further, a first rotating shaft 1602 is provided at one end portion, and a second rotating shaft 1603 is provided at the other end portion, so that the paddle base 16 as a whole can be rotatably arranged in the outlet casing 1 by the first rotating shaft 1602 and the second rotating shaft 1603 at both ends.

As an exemplary embodiment, for the transmission connection between the plectrum base 16 and the vertical damper 15, for example, a transmission tooth 1604 may be provided on the second rotation shaft 1603 at one end of the plectrum base 16, and at the same time, as shown in fig. 4, a corresponding matching tooth may also be provided on the transmission shaft 18 at one end of the vertical damper 15. Thus, the geared connection between the paddle base 16 and the vertical damper 15 is established by the meshing engagement of the geared teeth 1604 with the mating toothed plate.

In addition, to facilitate the arrangement of the driving fork 17 of the present embodiment, the guide strips 1606 on the paddle base 17 on both sides of the insertion opening 1605 may be divided into two sections, and an inward recessed notch 1607 is provided at a position between the two sections of the guide strips 1606. Through the arrangement of the notch 1607, a space for arranging the driving fork 17 can be provided, and the rotation of the driving fork 17 itself is facilitated.

As shown in fig. 7, the driving fork 17 of the present embodiment has a fork body 1701, and an installation shaft 1702 is provided on the top of the fork body 1701, and the installation shaft 1702 is used for the rotation of the driving fork 17 in the outlet casing 1. A first fork lever 1703 and a second fork lever 1704 are further provided at opposite ends of the fork body 1701 to be outwardly extended in the same direction. The first fork lever 1703 is slidably inserted into the panel slot 504 to achieve transmission connection between the driving fork 17 and the blade panel 5, and the second fork lever 1704 is slidably inserted into a link slot formed on the first link 19 to achieve transmission connection between the driving fork 17 and the link unit.

In this embodiment, the connecting seat 502 on the plectrum panel 5 is embedded in the embedded opening 1605 on the plectrum base 16, and the hook 503 on the plectrum panel 5 is hooked on the guide strip 1606, so that the plectrum panel 5 can be clamped on the plectrum base 16, and meanwhile, the plectrum panel 5 can be transversely guided and slid relative to the plectrum base 16 by utilizing the sliding of the connecting seat 502 along the embedded opening 1605 and the sliding of the hook 503 along the guide strip 1606.

When the plectrum panel 5 transversely slides, also can drive via the drive shift fork 17 the connecting rod unit removes, and the removal of connecting rod unit can realize the drive to horizontal air damper finally to realize the upset of horizontal air damper. As an exemplary arrangement of the link unit, the link unit of the present embodiment specifically includes a first link 19, a second link 20 having one end hingedly connected to the lateral damper, and an intermediate link 21 hingedly connected between one end of the first link 19 and the other end of the second link 20, as shown in fig. 8 in combination with fig. 9.

At this time, the other end of the first link 19 is provided with a link slot similar in structure to the panel slot 504 of the paddle panel 5, and the link slot is arranged in the same direction as the opening direction of the panel slot 504, and the second fork 1704 of the driving fork 17 is slidably fitted therein as described above. Of course, it is also possible to make the opening directions of the link insertion grooves coincide with those of the panel insertion grooves 504, so that the opening directions are just opposite, but at this time, the arrangement positions of the link units need to be adjusted accordingly.

In the present embodiment, as mentioned above, the air volume damper 16 is also disposed in the air outlet, and in this case, as shown in fig. 10 and 11, the air volume damper 16 is located at the air inlet 12 of the air outlet housing 1 connected to the air duct 4. Meanwhile, for the first wind direction adjusting assembly, the second adjusting assembly which is in transmission connection with the air quantity adjusting damper 13 and used for driving the air quantity adjusting damper 13 to turn over is also arranged on the air outlet shell 1 on the other side of the air outlet in the embodiment.

Also as an exemplary implementation form, the second adjusting component of the present embodiment specifically includes a knob 6 rotatably disposed on the air outlet casing 1, and a transmission rod 9 slidably disposed in the air outlet casing 1, and a transmission gear 14 disposed at one end of the air volume damper 13. The transmission rod 9 is respectively engaged with the knob 6 and the transmission gear 14 for transmission, so that the knob 6 can drive the air quantity adjusting air door 13 to turn over, and the opening and the closing of the air quantity adjusting air door 13 are controlled.

It should be noted that, in order to achieve a reliable arrangement of the transmission gear 14, in a specific arrangement, the transmission gear 14 is also engaged with the rack structure formed on the transmission rod 9 on one side, and at the same time, the other side of the transmission gear 14 is also engaged with the rack structure formed on the air outlet casing 1.

In addition, as a general arrangement, the vertical damper 15 for adjusting the wind direction vertically, that is, up and down, is generally provided in one in this embodiment. The transverse damper for adjusting the transverse direction, that is, the left and right direction of the wind, is generally a plurality of dampers arranged at intervals, that is, the upper blowing damper 10 and the lower blowing damper 11 are a plurality of dampers arranged at intervals, and as a preferred embodiment, the upper blowing damper 10 and the lower blowing damper 11 are also arranged in pairs, each pair of the upper blowing damper 10 and the lower blowing damper 11 are also fixedly connected into a whole, and each transverse damper composed of the upper blowing damper 10 and the lower blowing damper 11 which are fixedly connected together is connected by the second connecting rod 20 in a hinged manner, so as to finally form a linkage arrangement between each transverse damper.

In the present embodiment, the air volume damper 13 is similarly provided in plural at intervals as in the case of the lateral damper, but it is also possible to provide only one air volume damper 13 as in the case of the vertical damper 15, except that the air volume damper 13 is provided in plural. At this time, only the transmission structural form between the knob 6 and the air quantity adjusting damper 13 needs to be adjusted.

In addition, in order to further improve the appearance quality of the air outlet structure of the embodiment, a decorative plate 7 covering the air outlet casing 1 may be disposed outside the air outlet casing 1, and the decorative plate 7 and the air outlet casing 1 may be connected in a form such as clamping, screwing, and the like. The decorative plate 7 is hollowed out at a position corresponding to the air outlet, and the plectrum panel 5 and the knob 6 are exposed relative to the decorative plate 7. Meanwhile, a plurality of fixing seats 8 are also arranged on the decorative plate 7 and used for connecting the decorative plate with an automobile instrument panel structure.

The air outlet wind direction adjusting structure of this embodiment all sets up in one side of air outlet through with two adjusting part, compares in the current form that sets up that is located air outlet blade middle part, can make air outlet wind direction adjusting structure have the bright spot, can promote the aesthetic impression of air outlet structure, and has fine practicality.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an air outlet wind direction adjusts structure for adjust the air-out direction that forms the air outlet on air-out casing (1), its characterized in that: at least, be equipped with vertical air damper (15) that carry out the vertical regulation of wind direction in the air outlet to and carry out the horizontal air damper that the wind direction transversely adjusted, just air outlet wind direction adjustment structure include in one side setting of air outlet is in first wind direction adjusting part on air-out casing (1), first wind direction adjusting part constitute respectively with vertical air damper (15) reach horizontal air damper's transmission is connected, and because of accepting outside vertical or horizontal operating force along, and can order about vertical air damper (15) or horizontal air damper upset is in order to adjust the air-out direction.

2. The air outlet wind direction adjusting structure of claim 1, wherein: first wind direction adjusting part locates including rotating plectrum base (16) on the air-out casing (1), and be restricted in plectrum panel (5) on plectrum base (16), plectrum panel (5) can for plectrum base (16) lateral sliding, and can drive synchronous vertical upset of plectrum base (16), just plectrum base (16) with vertical air damper (15) transmission is connected, plectrum panel (5) with the transmission links to each other between the horizontal air damper.

3. The air outlet wind direction adjusting structure of claim 2, wherein: one end of the plectrum base (16) is provided with a transmission tooth part (1604), one end of the vertical air damper (15) is provided with a matching tooth part, the transmission tooth part (1604) is meshed with the matching toothed plate to form transmission connection between the plectrum base (16) and the vertical air damper (15).

4. The air outlet wind direction adjusting structure of claim 2, wherein: in rotate on air-out casing (1) and be equipped with drive shift fork (17), the one end of drive shift fork (17) with plectrum panel (5) transmission is connected, in order to follow the lateral sliding of plectrum panel (5) and reciprocating rotation, and for with the one end that plectrum panel (5) link to each other, the other end of drive shift fork (17) pass through the connecting rod unit with the transmission of horizontal air damper links to each other, and follows the rotation of drive shift fork (17), horizontal air damper because of the transmission of connecting rod unit can transversely overturn.

5. The air outlet wind direction adjusting structure of claim 4, wherein: constructed on plectrum base (16) have transverse arrangement inlay dress mouth (1605), and in the inboard of plectrum base (16) is equipped with transverse arrangement in inlay the gib block (1606) of dress mouth (1605) both sides, just the inboard of plectrum panel (5) is equipped with to inlay and locates connecting seat (502) in inlaying dress mouth (1605), in be equipped with on connecting seat (502) respectively corresponding to both sides trip (503) that gib block (1606) were arranged, plectrum panel (5) because of trip (503) in hook on gib block (1606) and the card are arranged in on plectrum base (16), and can have the edge the direction of gib block (1606) slides.

6. The air outlet wind direction adjusting structure of claim 4, wherein: the driving shifting fork (17) is provided with a first shifting fork rod (1703) and a second shifting fork rod (1704) which are respectively arranged at two opposite ends, the first shifting fork rod (1703) is slidably embedded in the panel slot (504), and the second shifting fork rod (1704) is slidably embedded in the connecting rod slot.

7. The air outlet wind direction adjusting structure of claim 6, wherein: the connecting rod unit comprises a first connecting rod (19) with one end provided with the connecting rod inserting slot, a second connecting rod (20) with one end hinged with the transverse adjusting air door, and an intermediate connecting rod (21) hinged between the other end of the first connecting rod (19) and the other end of the second connecting rod (20).

8. The air outlet wind direction adjusting structure of claim 1, wherein: the air outlet is including locating air outlet (2) of blowing on air-out casing (1) and air outlet (3) of blowing down, just vertical air damper (15) are located air outlet (2) of blowing on with the intersection of air outlet (3) of blowing down, in order to adjust air outlet (2) of blowing on with the aperture of air outlet (3) of blowing down, horizontal air damper has and is located respectively air outlet (2) of blowing on with air damper (10) of blowing down in air outlet (3) and air door (11) of blowing down.

9. The outlet wind direction adjustment structure of any one of claims 1 to 8, wherein: still be equipped with in the air outlet and be located horizontal air damper reaches air regulation air door (13) on vertical air damper (15) upper reaches, and for first wind direction adjusting part, in the air outlet opposite side be equipped with on air-out casing (1) with air regulation air door (13) transmission is connected, in order to order about the second adjusting part of air regulation air door (13) upset.

10. The air outlet wind direction adjusting structure of claim 9, wherein: the second adjusting component comprises a knob (6) which is rotatably arranged on the air outlet casing (1), a transmission rod (9) which is arranged in a sliding mode is arranged in the air outlet casing (1), the transmission rod (9) is respectively in meshed transmission with the knob (6) and between the air volume adjusting air doors (13), and the knob (6) is formed to drive the air volume adjusting air doors (13) to overturn.