CN213577779U - Wall-mounted air conditioner indoor unit - Google Patents

Abstract

The utility model provides a wall-mounted air conditioner indoor unit, which comprises a shell, wherein an air outlet is formed at the bottom of the front side of the shell, and a plurality of air dispersing holes are formed in the area of the bottom wall of the shell, which is close to the air outlet; each flow guide part is positioned on the inner side of the bottom wall of the shell and defines a flow passage communicated to at least part of the dispersed air holes together with the bottom wall of the shell; the front end of the rear wall of the air channel is connected with the rear end of each flow guide part and is communicated with each overflowing channel so as to guide the air supply flow to the air outlet and the overflowing channel, so that the air supply flow in the overflowing channel is blown out through the air dispersing holes; and at least one swing blade group, each of which includes a plurality of swing blades provided in one of the through-flow passages to change the flow direction of the supply air flow in the through-flow passage by synchronous rotation. The utility model discloses a machine has realized comfortable air supply in wall-hanging air conditioning.

Description

Wall-mounted air conditioner indoor unit

Technical Field

The utility model relates to an air conditioning technology field, in particular to wall-mounted air conditioner indoor unit.

Background

With the development of the times and the progress of technology, users not only expect faster cooling and heating speeds of air conditioners, but also pay more attention to the comfort performance of the air conditioners.

However, in order to achieve more rapid cooling and heating, it is inevitable to supply a large amount of air. However, when cold air or hot air with an excessive wind speed is directly blown to a human body, discomfort of the human body is inevitably caused. The long-term cold wind blowing of human body can also cause air conditioning diseases.

Therefore, how to realize comfortable air supply of the air conditioner becomes a technical problem to be solved urgently in the air conditioner industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can realize the wall-hanging air conditioning indoor set of comfortable air supply.

The further purpose of the utility model is to prevent the air holes from generating condensation.

The utility model discloses a further aim is to simplify the air supply structure of wall-hanging air conditioning indoor set.

Particularly, the utility model provides a wall-hanging air conditioning indoor set, it includes:

the air outlet is formed at the bottom of the front side of the shell, and a plurality of air dispersing holes are formed in the area, close to the air outlet, of the bottom wall of the shell;

each flow guide part is positioned on the inner side of the bottom wall of the shell and defines a flow passage communicated to at least part of the dispersed air holes together with the bottom wall of the shell;

the front end of the rear wall of the air channel is connected with the rear end of each flow guide part and is communicated with each overflowing channel so as to guide the air supply flow to the air outlet and the overflowing channel, so that the air supply flow in the overflowing channel is blown out through the air dispersing holes; and

and each swing blade group comprises a plurality of swing blades which are arranged in one overflowing channel so as to change the flowing direction of the air supply flow in the overflowing channel through synchronous rotation.

Optionally, each of the swing vanes is rotatably mounted to the flow guide.

Optionally, each flow guide comprises: the channel enclosure plate extends upwards from the inner side surface of the bottom wall of the shell and is used for defining a flow channel together with the bottom wall of the shell; and the connecting plate extends backwards from the top end of the channel baffle plate so as to be connected with the front end of the rear wall of the air channel.

Optionally, each flow guide is an integral piece with the housing.

Optionally, the air outlet and each flow guide part are long strips, and the length direction of each strip is parallel to the transverse direction of the shell; the individual flaps of each flap group are arranged in the transverse direction of the housing.

Optionally, the plurality of air dispersing holes form a plurality of air dispersing areas arranged along the transverse direction of the shell, and each air dispersing area is a long strip with the length direction parallel to the transverse direction of the shell; the quantity of water conservancy diversion portion is a plurality of, and every water conservancy diversion portion corresponds a wind-dispersing district.

Optionally, the wall-mounted indoor air conditioner further includes: and the inner air deflector is rotatably arranged on the inner side of the air outlet and is used for guiding the upper and lower air outlet directions of the air outlet.

Optionally, the inner air deflector is configured to direct the supply air flow towards the over-flow channel.

Optionally, a plurality of spherical recesses are formed in both side surfaces of the inner air deflector.

Optionally, the wall-mounted air conditioning indoor unit further includes an outer air deflector rotatably mounted to the casing for opening or closing the air outlet.

The utility model discloses a wall-hanging air conditioning indoor set has seted up a plurality of scattered wind holes at the diapire of casing to still set up water conservancy diversion portion, made water conservancy diversion portion and casing diapire inject the passageway that overflows in intercommunication scattered wind hole. When the air outlet is in an open state, the main part of the air supply flow (the air supply flow is usually heat exchange air which exchanges heat with the heat exchanger) in the shell is blown to the indoor from the air outlet, and the other part of the air supply flow outside the main part enters the overflowing channel, is blown to the air dispersing holes under the guidance of the flow guide part, and is blown to the indoor after being dispersed by the air dispersing holes. The airflow becomes softer after being scattered, a no-wind effect is achieved, and comfortable air supply of the air conditioner is realized. When the air outlet is closed (for example, closed by an external air deflector), all the air supply airflow is forced to flow to the plurality of air dispersion holes, so that the plurality of air dispersion holes supply air with large air volume, and the effect of completely supplying air without wind sense is realized.

And, the utility model discloses an among the wall-hanging air conditioning indoor set, be provided with the pendulum leaf group in every overflows the passageway, a plurality of pendulum leaves themselves have broken up the air supply air current, have the efficiency to prevent to overflow the passageway inner wall and appear the condensation. And the flow direction of the air supply airflow in the flow passage can be changed by adjusting the angle of the swing blade, so that the included angle between the flow direction of the air supply airflow and the axis of the air dispersing hole is changed. The smaller the included angle is, the smoother the air supply flow can pass through the air dispersing holes, and the larger the air quantity is; the larger the included angle is, the larger the resistance of the air supply airflow entering the air dispersing hole is, the smaller the air quantity is, but the finer and more comfortable the air outlet airflow is. Therefore, the swing blade has the functions of adjusting the air quantity of the air dispersing hole and the comfort level.

Further, the utility model discloses an among the wall-hanging air conditioning indoor set, because a plurality of scattered wind holes are located the casing diapire, can vertical air supply downwards, remedy traditional wall-hanging air conditioning indoor set and only relied on the air outlet air supply, the defect of vertical air supply downwards of not being convenient for. Particularly, when the air conditioner is in a heating mode, the temperature of the area right below the indoor unit of the wall-mounted air conditioner can be increased more quickly by utilizing the plurality of air dissipation holes to supply air vertically downwards.

Further, the utility model discloses an among the wall-hanging air conditioning indoor set, water conservancy diversion portion includes passageway enclosure baffle and connecting plate. The channel baffle plate and the bottom wall of the shell define a flow passage together, and can guide air flow to the air dispersing holes. The connecting plate extends backward from the top end of the channel enclosure plate to be connected with the front end of the rear wall of the air channel, so that the connecting plate is equivalent to an extension section of the rear wall of the air channel, the connection transition of the rear wall of the air channel and the connecting plate is more natural and smooth, and extra on-way resistance cannot be brought to air flow. And the air supply airflow passes through the air duct rear wall and the connecting plate and then is bent downwards to enter the air passage channel, so that the bottom wall of the shell, the rear wall of the channel baffle plate and the air duct rear wall form a step surface, and when the wall-mounted air conditioner indoor unit operates for refrigeration, the step surface structure can effectively prevent condensation at the air dispersing hole.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a wall-mounted air conditioner indoor unit according to an embodiment of the present invention;

FIG. 2 is an enlarged view at A of FIG. 1;

fig. 3 is a schematic structural view of the wall-mounted air conditioning indoor unit of fig. 1 with an external air deflector hidden;

FIG. 4 is an enlarged view at B of FIG. 3;

fig. 5 is an enlarged cross-sectional view of the wall-mounted air conditioning indoor unit shown in fig. 1;

FIG. 6 is an enlarged view at C of FIG. 5;

fig. 7 is a schematic view showing a structure of a casing in the wall-mounted type air conditioning indoor unit of fig. 1;

fig. 8 is an enlarged view of fig. 7 at D.

Detailed Description

A wall-mounted air conditioning indoor unit according to an embodiment of the present invention will be described with reference to fig. 1 to 8. Where the orientations or positional relationships indicated by the terms "front", "back", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc., are based on the orientations or positional relationships shown in the drawings, they are merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Fig. 1 is a schematic structural view of a wall-mounted air conditioner indoor unit according to an embodiment of the present invention; FIG. 2 is an enlarged view at A of FIG. 1; fig. 3 is a schematic structural view of the wall-mounted air conditioning indoor unit of fig. 1 with an external air deflector hidden; FIG. 4 is an enlarged view at B of FIG. 3; fig. 5 is an enlarged cross-sectional view of the wall-mounted air conditioning indoor unit shown in fig. 1; FIG. 6 is an enlarged view at C of FIG. 5; fig. 7 is a schematic view showing a structure of a casing in the wall-mounted type air conditioning indoor unit of fig. 1; fig. 8 is an enlarged view of fig. 7 at D.

As shown in fig. 1 to 8, a wall-mounted air conditioning indoor unit according to an embodiment of the present invention may generally include a casing 10, at least one guide portion 70, at least one vane set, and an air duct 20.

An air outlet 12 is formed at the bottom of the front side of the casing 10, and a plurality of air dispersing holes 13 are formed in a region of the bottom wall 101 of the casing 10 adjacent to the air outlet 12. The air outlet 12 is open forward and downward, and the front edge of the bottom wall 101 of the housing 10 forms the lower edge (also the rear edge) of the air outlet 12, and the area where the air dispersing holes 13 are located is adjacent to the front edge of the bottom wall 101.

Each flow guide 70 is located inside the bottom wall 101 of the housing 10 and defines, together with the bottom wall 101 of the housing 10, a flow passage 701 communicating with at least part of the dispersion wind holes 13. Specifically, if only one flow guide portion 70 is provided, the flow passage 701 of the flow guide portion 70 communicates with all the air diffusing holes 13. If a plurality of flow guiding parts 70 are provided, the flow passage 701 of each flow guiding part 70 corresponds to one of the dispersion air holes 13, and each dispersion air hole 13 is ensured to correspond to one flow passage 701.

The air duct 20 is formed within the housing 10 and is defined by a rear wall 21 (or volute) and a front wall 22 (or tongue). The front end of the rear wall 21 is connected to the rear end of each flow guide part 70 and is communicated with each flow passage 701, so as to guide the blowing air flow to the air outlet 12 and the flow passage 701. The supply air flow entering the overflow passage 701 is blown out through the plurality of air-dispersing holes 13.

Each of the swing blade groups 80 includes a plurality of swing blades 81, and the plurality of swing blades 81 are provided in one of the flow passages 701 to change the flow direction of the air flow in the flow passage 701 by synchronous rotation.

The supply air flow in this embodiment is usually heat exchange air that exchanges heat with the heat exchanger 30, and may be fresh air flow. For example, a wall-mounted air conditioning indoor unit may be an indoor part of an air conditioner that performs cooling/heating using a vapor compression refrigeration cycle. A heat exchanger 30 and a fan 40 are provided in the casing 10. Under the action of the fan 40, indoor air enters the casing 10 through the air inlet 11 at the top of the casing 10, completes forced convection heat exchange with the heat exchanger 30 to form heat exchange air, and then is blown to the air outlet 12 and the overflowing channel 701 under the guidance of the air duct 20.

The embodiment of the utility model provides an in, because a plurality of scattered wind holes 13 have been seted up to diapire 101 of casing 10 of wall-hanging air conditioning indoor set to the water conservancy diversion portion 70 has still been set up, the passageway 701 that overflows that communicates scattered wind hole 13 is injectd with diapire 101 of casing 10 to the water conservancy diversion portion 70. In this way, the wall-mounted air conditioner indoor unit has various air supply modes without wind sensation, such as:

first, the outlet 12 is opened, and the main part of the blowing airflow inside the casing 10 is blown into the room through the outlet 12. The other part of the main part of the blowing air flow enters the flow passage 701, is guided by the guide part 70, is blown to the air dispersing holes 13, is dispersed by the air dispersing holes 13, and is blown downward into the room. The air supply airflow becomes softer after being scattered, an air supply effect close to no wind sensation is achieved, and comfortable air supply of the air conditioner is realized.

The utility model discloses among the wall-hanging air conditioner indoor set, be provided with pendulum leaf group 80 in every overflows passageway 701, a plurality of pendulum leaves 81 themselves have broken up the air supply air current, have the efficiency to prevent to overflow the passageway inner wall and appear the condensation. Moreover, the flow direction of the air supply flow in the flow passage 701 can be changed by adjusting the angle of the swing blade 81, so that the included angle between the flow direction of the air supply flow and the axis of the air dispersing hole 13 is changed. The smaller the included angle is, the smoother the air supply flow can pass through the air dispersing holes 13, and the larger the air quantity is; the larger the included angle is, the larger the resistance of the air supply flow entering the air dispersing holes 13 is, the smaller the air quantity is, but the finer and more comfortable the air outlet flow is. As can be seen, the swing blade 81 has the function of adjusting the air volume and comfort of the air dispersing hole 13.

In addition, because the plurality of air dispersing holes 13 are formed on the bottom wall 101 of the housing 10, air can be supplied vertically downward, and the defect that air is not conveniently supplied vertically downward due to the fact that air is supplied only through an air outlet in the prior art is overcome. Particularly, in the heating mode, the plurality of air dissipation holes 13 are used for supplying air vertically and downwards, so that the temperature of the area right below the indoor unit of the wall-mounted air conditioner is increased more quickly, and the problem that hot air is difficult to flow right below the indoor unit in the prior art is solved.

Secondly, the outlet 12 is closed (e.g. by the external air guiding plate), as shown in fig. 5. When the air outlet 12 is closed, all the air flow is forced to flow to the plurality of air-dispersing holes 13, so that the plurality of air-dispersing holes 13 can supply air with large air volume, and the effect of completely supplying air without wind sense is realized.

In some embodiments, as shown in fig. 1 and 5, the wall-mounted air conditioning indoor unit may further include an outer air guide plate 50. The outer air guide plate 50 is rotatably installed to the housing 10 for opening or closing the air outlet 12. Of course, the outer wind deflector 50 may also have a function of guiding the air blowing direction of the air outlet 12 up and down. It will be appreciated that the axis of rotation of the outer air deflectors 50 is parallel to the transverse direction of the casing 10, which transverse direction of the casing 10 has been indicated in the relevant figures.

In some embodiments, the wall-mounted air conditioning indoor unit may further include a human detection sensor and a controller. The human body sensor is mounted on the casing 10 and used for detecting whether a human body enters the air outlet coverage range of the air outlet 12, and specifically, the human body sensor can be an infrared sensor. Based on this, an alternative non-wind-sensing control mode is as follows: when the human body sensor detects that the human body enters the air outlet coverage range, a human body sensing signal is formed, and the human body sensing signal is transmitted to the controller. The controller controls the outer air deflector 50 to close the air outlet 12, so that the air conditioner can completely supply air without wind sense through the plurality of air dispersing holes 13, and cold air or hot air is prevented from directly blowing to a human body. When the human body sensor detects that the human body leaves the air outlet coverage area, the controller controls the outer air deflector 50 to open the air outlet 12, and the air is normally supplied.

In some embodiments, the air outlet 12 and each flow guiding portion 70 are long strips with the length direction parallel to the transverse direction of the housing 10, and the swing blades 81 of each swing blade group 80 are arranged along the transverse direction of the housing 10. A plurality of the swing blade groups 80 may share a common link 83, the link 83 extends in a lateral direction of the housing 10, and each of the swing blades 81 is connected to a different portion in a longitudinal direction of the link 83. The link is driven by a motor (not shown) to reciprocate in the lateral direction of the housing 10 to drive the plurality of swing vanes 81 to swing reciprocally.

The aforementioned plurality of air-dispersing holes 13 (i.e., all of the air-dispersing holes 13) constitute a plurality of air-dispersing areas arranged in the transverse direction of the casing 10, and each air-dispersing area is elongated with its length direction parallel to the transverse direction of the casing 10. Correspondingly, the number of the flow guiding parts 70 is multiple, and each flow guiding part 70 corresponds to one wind dispersing area. As shown in fig. 1 to 8, the number of the wind dispersing areas is two, namely, the wind dispersing area a1 and the wind dispersing area a2, and the two wind dispersing areas a1 and a2 are arranged at intervals in the transverse direction of the housing 10, that is, at intervals in the left and right direction. The number of the flow guide portions 70 is also two, and each flow guide portion 70 corresponds to one wind dispersing area. In this way, the area between the two flow guiding parts 70 can be used for installing the rotating shaft of the inner air guiding plate or the outer air guiding plate.

The individual air dissipation holes 13 in each air dissipation zone may be arranged in a matrix, see fig. 2. In addition, the air dispersing holes 13 may be circular holes, kidney-shaped holes, square holes, elliptical holes, triangular holes, polygonal holes, or other openings of various shapes.

In some embodiments, as shown in fig. 5-8, each flow guide 70 includes a channel apron 71 and a web 72. Wherein the channel containment flaps 71 extend upwardly from the inner surface of the bottom wall 101 of the housing 10 for defining with the bottom wall 101 the aforementioned overflow channels 701. The passage fence 71 specifically includes a rear plate and left and right side plates extending forward from both lateral ends of the rear plate, and front ends of the two side plates are joined to the bottom wall 101 of the housing 10. The connecting plate 72 extends rearward from the top end of the passage fence 71 to meet the front end of the rear wall 21 of the air chute 20. Each of the swing blades 81 may be rotatably installed to the guide part 70. In particular, the swinging vane 81 can be installed on the channel baffle 71, so that the swinging vane 81 is just in the flow channel 701. In this embodiment, the passage enclosure 71 not only defines the flow passage 701 together with the bottom wall 101 of the casing 10, but also guides the flow of the supply air to the air dispersing holes 13. The connecting plate 72 extends from the top end of the channel baffle 71 to connect with the front end of the rear wall 21 of the air duct 20, so that the connecting plate 72 is equivalent to an extension of the rear wall 21 of the air duct 20, which makes the connection transition between the rear wall 21 of the air duct 20 and the connecting plate 72 more natural and smooth without causing extra on-way resistance to the air flow.

In the above embodiment, the air flow is guided forward by the rear wall 21 of the air duct 20 and the connecting plate 72, and then bends downward to enter the flow passage 701, so that the bottom wall 101 of the housing 10, the rear wall of the passage baffle 71 and the rear wall 21 of the air duct 20 form a step surface. When the wall-mounted air conditioner indoor unit operates in a refrigeration mode, condensation at the air dispersing holes 13 can be effectively prevented by the stepped surface structure, and condensation water is prevented from dripping out through the air dispersing holes 13.

In some embodiments, as shown in fig. 5-8, each flow guide 70 is an integral piece with the housing 10. The design makes the structure simpler on the one hand, has saved the assembly work in later stage, and on the other hand also makes the position of being connected of water conservancy diversion portion 70 and the diapire 101 of casing 10 not have any gap, can avoid the air supply air current to leak through the gap between the two and flow back to the inside of casing 10 (the inside in non-wind channel 20), causes cold volume/heat waste. Especially, when the outer air deflector 50 closes the air outlet 12, the air flow of the supply air is forced to flow to the flow passage 701 by the fan, the air pressure in the flow passage 701 is large, and if a gap exists between the air guide part 70 and the bottom wall 101 of the housing 10, a leakage problem is easily caused.

In some embodiments of the present invention, as shown in fig. 3 and 4, the wall-mounted air conditioner indoor unit further includes an inner air deflector 60. The inner wind deflector 60 is rotatably installed inside the air outlet 12 for guiding the air outlet direction of the air outlet 12.

The wall-mounted type air conditioning indoor unit may be simultaneously installed with the inner air guide plate 60 and the outer air guide plate 50. The outer air guiding plate 50 is mainly used for opening and closing the air outlet 12, the inner air guiding plate 60 is located inside the outer air guiding plate 50, and when the outer air guiding plate 50 is in a state of closing the air outlet 12, the inner air guiding plate 60 is shielded inside the casing 10. When the outer air guiding plate 50 opens the air outlet 12, the inner air guiding plate 60 is used for guiding the air outlet direction of the air outlet 12, including swinging the air up and down.

In some embodiments, the inner air deflector 60 is configured to direct the supply air flow toward the flow passage 701. As can be seen from the above, when the air outlet 12 is in the closed state, the air flow will flow to the flow passage 701. At this time, the inner air deflector 60 can guide the blowing air flow toward the flow passage 701, so that the blowing air flow can flow more smoothly toward the flow passage 701, and does not detour and bend into the flow passage 701 after rushing to the inner side of the outer air deflector 50, thereby causing large pressure loss.

In some embodiments, as shown in fig. 3 and 4, both side surfaces of the inner air deflection plate 60 are formed with a plurality of spherical recesses 61. This makes inner air deflector 60 also carried out the vortex to the air supply air current when the wind-guiding, makes it more dispersed, has improved the comfort level of air supply air current. The inner air deflector 60 is matched with the air dispersing holes 13, and the air flow is comfortable to process by utilizing different structures, so that the air supply flow is more comfortable, and the use experience of a user is improved.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. A wall-mounted air conditioner indoor unit, comprising:

the air outlet is formed at the bottom of the front side of the shell, and a plurality of air dispersing holes are formed in the area, close to the air outlet, of the bottom wall of the shell;

each flow guide part is positioned on the inner side of the bottom wall of the shell and defines an overflowing channel communicated with at least part of the air dispersing holes together with the bottom wall of the shell;

the front end of the rear wall of the air channel is connected with the rear end of each flow guide part and is communicated with each overflowing channel so as to guide the air supply flow to the air outlet and the overflowing channel, so that the air supply flow in the overflowing channel is blown out through the air diffusing holes; and

at least one swinging blade group, wherein each swinging blade group comprises a plurality of swinging blades which are arranged in one overflowing channel so as to change the flowing direction of the air supply flow in the overflowing channel through synchronous rotation.

2. The wall-mounted air conditioning indoor unit of claim 1,

each swing blade is rotatably mounted to the flow guide portion.

3. The wall-mounted air conditioning indoor unit of claim 1, wherein each of the deflectors comprises:

the channel baffle plate extends upwards from the inner side surface of the bottom wall of the shell and is used for defining the overflowing channel together with the bottom wall of the shell; and

and the connecting plate extends backwards from the top end of the channel baffle plate so as to be connected with the front end of the rear wall of the air duct.

4. The wall-mounted air conditioning indoor unit of claim 1,

each flow guide part and the shell are integrally formed.

5. The wall-mounted air conditioning indoor unit of claim 1,

the air outlet and each flow guide part are long strips, and the length direction of each flow guide part is parallel to the transverse direction of the shell;

the swing blades of each of the swing blade groups are arranged in a transverse direction of the housing.

6. The wall-mounted air conditioning indoor unit of claim 5,

the plurality of air dispersing holes form a plurality of air dispersing areas which are arranged along the transverse direction of the shell, and each air dispersing area is in a long strip shape with the length direction parallel to the transverse direction of the shell;

the number of the flow guide parts is multiple, and each flow guide part corresponds to one wind dispersing area.

7. The wall-mounted air conditioning indoor unit of claim 1, further comprising:

and the inner air deflector is rotatably arranged on the inner side of the air outlet and is used for guiding the upper and lower air outlet directions of the air outlet.

8. The wall-mounted air conditioning indoor unit of claim 7,

the inner air deflector is configured to direct the supply airflow toward the over-flow channel.

9. The wall-mounted air conditioning indoor unit of claim 7,

a plurality of spherical pits are formed in the surfaces of the two sides of the inner air deflector.

10. The wall-mounted air conditioning indoor unit of claim 1, further comprising:

and the outer air deflector is rotatably arranged on the shell and is used for opening or closing the air outlet.

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