Indoor unit air outlet mechanism and air conditioner
By designing an indoor unit air outlet mechanism with a windshield in a wall-mounted air conditioner indoor unit, the windshield motor is used to drive the windshield and the air guide plate to form an angle, which solves the problem that the prior art is difficult to achieve forward windshield and lateral windshield, and achieves lateral windshield and reduces noise.
Patent Information
- Application Number
- CN202311355516.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-18
- Publication Date
- 2025-04-25
AI Technical Summary
It is difficult to achieve forward wind barrier and sideways air outlets for existing wall-mounted air conditioners.
An indoor unit air outlet mechanism is designed, including a air guide plate and a air shield plate. The wind shield plate and the air guide plate are driven to form an angle between the air shield plate and form an opening to achieve lateral air outlet.
It realizes air outlet to the side when the forward air is blocked, reducing air conditioning noise and improving user experience.
Smart Images

Figure CN119879268A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air conditioners, and in particular to an indoor unit air outlet mechanism and an air conditioner. Background Art
[0002] The wall-mounted air conditioner indoor unit is a widely used household refrigeration equipment. However, the air outlet of the wall-mounted air conditioner indoor unit is usually opened and closed by the air guide door to control the wind direction. During the operation of the air conditioner, the air can be delivered to the front of the air guide plate, but when the air guide plate closes the air outlet to discharge air forward, the air outlet cannot discharge air to the side. Summary of the invention
[0003] The first object of the present invention is to provide an indoor unit air outlet mechanism to solve the existing technical problem that it is difficult to achieve forward wind shielding and lateral air outlet.
[0004] The indoor unit air outlet mechanism provided by the present invention comprises:
[0005] An air guide plate is drivingly connected to the air guide motor;
[0006] The wind shield is pivotally connected to the free end of the wind guide plate, and the wind guide plate is transmission-connected to a wind shield motor arranged on the inner machine body. The wind shield is located on the side of the wind guide plate facing the large part of the air outlet cross section.
[0007] The beneficial effects brought by the indoor unit air outlet mechanism of the present invention are:
[0008] By pivoting the wind shield at the free end of the wind guide plate and using a wind shield motor arranged on the indoor unit body to drive the wind shield, the wind shield and the wind guide plate can be driven to form an angle, and the wind shield and the wind guide plate jointly block the airflow forward from the disposal port, and an opening is formed in the angle area at the ends of the wind shield and the wind guide plate in the length direction, and the air flow flows out from the opening area, so that the air outlet mechanism of the indoor unit can discharge air to the side when the forward air outlet is blocked.
[0009] In a preferred technical solution, the windshield motor is transmission-connected with a windshield gear, the windshield gear is meshed with a windshield rack, and the windshield rack is pivotally connected to the windshield plate.
[0010] By setting the wind shield rack and the wind shield gear to be pivotally connected, the position of the wind shield rack on its own length can be controlled, thereby controlling the angle of the wind shield relative to the wind guide plate.
[0011] In a preferred technical solution, the wind shield gear is located below the wind shield rack, and the indoor unit air outlet mechanism includes a lifting component, and the lifting component is used to drive the wind shield rack to engage with the wind shield gear.
[0012] By setting up the lifting component, the windshield rack can be meshed with the windshield gear, so that the windshield rack can be close to the windshield gear, ensuring stable meshing of the two, thereby achieving precise control of the windshield rack by the windshield gear.
[0013] In a preferred technical solution, the lifting assembly includes a windshield guide member, which is connected to the windshield rack; the windshield guide member is configured to be able to move along a guide groove provided on the inner machine body.
[0014] By connecting the windshield guide member connected to the windshield rack to the guide groove by rolling friction, the guide groove can be used to limit the position of the windshield guide member, and cooperate with the windshield rack pivotally connected to the windshield plate to jointly control the position of the windshield rack, and utilize the change in the position of the windshield rack in its length direction to change the position of the pivot point of the windshield rack of the windshield plate, thereby controlling the angle of the windshield plate relative to the wind guide plate.
[0015] In a preferred technical solution, the guide groove is an arc-shaped groove, and the guide groove is configured so that when the windshield guide member moves along the guide groove, the windshield rack engages with the windshield gear.
[0016] The arc groove can be adapted to the motion trajectory of one end of the windshield, so that the windshield rack can be driven to move along the length direction by controlling the windshield motor to drive the gear to rotate, thereby controlling the opening angle of the windshield relative to the wind guide plate, and then controlling the proportion of the windshield covering the air outlet, thereby preventing the air outlet from blowing forward. At the same time, the windshield and the wind guide plate form an opening area with an angle at the edges of both ends of the air outlet.
[0017] In a preferred technical solution, the center of the guide groove is the position of the pivot point between the wind guide plate and the wind shield plate when the wind guide plate is opened to the maximum extent.
[0018] The center of the guide groove is the center of the pivotal position of the air guide plate and the wind shield plate when the air guide plate is opened to the maximum extent. It can be achieved that when the air guide plate is opened to the maximum extent, if the air volume of the air outlet is adjusted and the blocked area of the air outlet is changed so that air is only discharged from the air outlet to the side, it is only necessary to adjust the position of the wind shield rack, and there is no need to use the air guide motor to drive the movement of the air guide plate. Only one motor is needed to realize this function, which is beneficial to reduce the noise emitted by the air conditioner at this time and improve the user experience.
[0019] In a preferred technical solution, the windshield guide is eccentrically arranged on the windshield rack at the pivot point between the windshield rack and the windshield plate.
[0020] By arranging the position of the windshield guide on the windshield rack to be different from the pivot point between the windshield rack and the windshield plate, the windshield guide and the pivot point can be used to jointly determine the position of the windshield rack to ensure that the windshield rack is meshed with the windshield gear.
[0021] In a preferred technical solution, the windshield rack is an arc-shaped rack.
[0022] By using an arc-shaped rack, when the angle of the air guide plate remains unchanged and the angle of the wind shield relative to the air guide plate changes, the wind shield rack can always maintain engagement with the wind shield gear, so that only the wind shield motor needs to be driven when realizing front wind shielding and side air outlet, thereby helping to reduce the noise emitted by the air conditioner at this time and improve user experience.
[0023] In a preferred technical solution, the windshield is a flat plate.
[0024] When the air conditioner is blowing air normally, the angle between the wind shield and the air guide plate is minimized, and the wind shield is a flat plate, which can reduce the interference of the air guide mechanism on the airflow when the air conditioner is blowing air forward normally.
[0025] The second object of the present invention is to provide an air conditioner to solve the technical problem of difficulty in achieving forward wind shielding and lateral air outlet.
[0026] The air conditioner provided by the present invention comprises a wall-mounted air conditioner indoor unit, wherein the wall-mounted air conditioner indoor unit comprises an air outlet and the indoor unit air outlet mechanism arranged at the air outlet.
[0027] By arranging the above-mentioned indoor unit air outlet mechanism in the air conditioner, the air conditioner accordingly has all the advantages of the above-mentioned indoor unit air outlet mechanism, which will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background technology, the drawings required for use in the embodiments or the background technology description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0029] Figure 1 It is a schematic diagram of an air conditioner in the background technology when the air guide plate is opened;
[0030] Figure 2 This is a schematic diagram of the structure of the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a state where the side air outlet is the main state;
[0031] Figure 3A schematic diagram of the structure of a wall-mounted air conditioner indoor unit used in the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a lateral air outlet state at this time;
[0032] Figure 4 This is a schematic diagram of the structure of the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a state where the air outlet is mainly in the forward direction;
[0033] Figure 5 This is a schematic diagram of the structure of a wall-mounted air conditioner indoor unit used by the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a forward air outlet state at this time;
[0034] Figure 6 This is a schematic diagram of the structure of a wall-mounted air conditioner indoor unit used in the indoor unit air outlet mechanism provided in the first embodiment of the present invention, in which the air outlet is closed at this time;
[0035] Description of reference numerals:
[0036] 11- wind guide plate; 12- wind guide motor; 13- wind guide swing rod;
[0037] 21- windshield; 22- windshield motor; 23- windshield gear; 24- windshield rack;
[0038] 30-inner machine body; 31-guide groove. DETAILED DESCRIPTION
[0039] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0040] Embodiment 1:
[0041] Figure 2 This is a schematic diagram of the structure of the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a state where the side air outlet is the main state; Figure 3 This is a schematic diagram of the structure of a wall-mounted air conditioner indoor unit used in the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a lateral air outlet state. Figure 2-Figure 3 As shown, the indoor unit air outlet mechanism provided in the first embodiment of the present invention includes:
[0042] The air guide plate 11 is drivingly connected to the air guide motor 12;
[0043] The wind shield 21 is pivotally connected to the free end of the wind guide plate 11, and the wind guide plate 11 is transmission-connected to a wind shield motor 22 disposed on the inner machine body 30. The wind shield 21 is located on a side of the wind guide plate 11 facing the majority of the air outlet cross section.
[0044] Generally speaking, the indoor unit body 30 includes a middle frame and a base, and an air outlet is arranged in the bottom area of the front surface of the base. The windshield motor 22 is installed on the end face side wall of the air outlet in the length direction. Among them, in this application, the front side and the front side indicate the direction of the component or component away from the wall on which the wall-mounted air conditioner indoor unit is installed, and the rear side and the rear side are the directions of the component or component toward the wall of the wall-mounted air conditioner indoor unit. The length direction of the air outlet is consistent with the length direction of the air conditioner, and the length direction of the air outlet is perpendicular to the above-mentioned forward or rearward direction.
[0045] Specifically, the end of the air guide plate 11 in the opposite direction of the air outlet direction is connected to the air guide motor 12 through a guide swing rod, the air guide motor 12 is installed on the base, and the air guide swing rod 13 is fixed on the power output shaft of the air guide motor 12. The free end of the air guide plate 11 is the end of the air guide plate 11 downstream along the air outlet direction, in other words, it is usually the front end of the air guide plate 11.
[0046] Among them, the wind shield 21 is located on the side of the wind guide plate 11 facing the larger part of the cross-section of the air outlet. Taking the wall-mounted air conditioner indoor unit as an example, it means that the wind guide plate 11 is usually installed at a position biased towards the upper edge or lower edge of the air outlet, rather than at a position centered in the height direction of the air outlet. For example, the rotation axis of the wind guide plate 11 is located at a position 70% or 80% from top to bottom of the air outlet. The side of the wind guide plate 11 facing the larger part of the cross-section of the air outlet mentioned here is the upper side of the wind guide plate 11, not the lower side of the wind guide plate 11, that is, not the side facing the smaller area of the cross-section of the air outlet. Of course, if the wind guide plate 11 is located at a relatively upper position of the air outlet, the side of the wind guide plate 11 facing the larger part of the cross-section of the air outlet is the lower side of the wind guide plate 11.
[0047] By pivoting the wind shield 21 at the free end of the wind guide plate 11 and using the wind shield motor 22 arranged on the indoor unit body 30 to drive the wind shield 21, the wind shield 21 can be driven to form an angle with the wind guide plate 11. The wind shield 21 and the wind guide plate 11 jointly block the forward airflow from the disposal port, and an opening is formed in the angle area at the ends of the wind shield 21 and the wind guide plate 11 in the length direction. The airflow flows out from the opening area, so that the indoor unit air outlet mechanism can discharge air to the side position when the forward air outlet is blocked.
[0048] Figure 4 This is a schematic diagram of the structure of the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a state where the air outlet is mainly forward; Figure 2 and Figure 4 As shown, preferably, the windshield motor 22 is drivingly connected to a windshield gear 23 , the windshield gear 23 is meshed with a windshield rack 24 , and the windshield rack 24 is pivotally connected to the windshield plate 21 .
[0049] Specifically, the windshield gear 23 can be fixedly connected to the output shaft of the windshield motor 22 to transmit power to the windshield rack 24. Specifically, in this embodiment, the position where the windshield rack 24 is pivoted to the windshield plate 21 is relatively close, and the position where the windshield plate 21 is pivoted to the windshield rack 24 and the pivot point where the windshield plate 21 is pivoted to the wind guide plate 11 are respectively located at two ends of the windshield plate 21.
[0050] By setting the wind shield rack 24 to be pivotally connected to the wind shield gear 23, the position of the wind shield rack 24 on its own length can be controlled, thereby controlling the angle of the wind shield plate 21 relative to the wind guide plate 11.
[0051] like Figure 2 and Figure 4 As shown, preferably, the wind shield gear 23 is located below the wind shield rack 24 , and the indoor unit air outlet mechanism includes a lifting component, which is used to drive the wind shield rack 24 to engage with the wind shield gear 23 .
[0052] By setting up the lifting component, the windshield rack 24 can be meshed with the windshield gear 23 so that the windshield rack 24 can be close to the windshield gear 23 to ensure stable meshing of the two, thereby achieving precise control of the windshield rack 24 by the windshield gear 23.
[0053] In another implementation, the windshield rack 24 may be located above the windshield gear 23 , and the windshield gear 23 is used to block the downward movement tendency of the windshield rack 24 .
[0054] like Figure 2 and Figure 4 As shown, preferably, the lifting assembly includes a windshield guide (not shown in the figure), which is connected to the windshield rack 24; the windshield guide is configured to be able to move along a guide groove 31 provided on the inner machine body 30.
[0055] In this embodiment, the windshield guide member may be a guide wheel rotatably connected to the windshield rack 24. The windshield guide member moves along the guide groove 31, and specifically, the windshield guide wheel rolls in the guide groove 31. Of course, in another implementation, the windshield guide member may also be a guide rod disposed on the windshield rack 24, and the guide rod directly contacts the guide groove 31 and moves along the guide groove 31.
[0056] By connecting the windshield guide member connected to the windshield rack 24 to the guide groove 31 by rolling friction, the guide groove 31 can be used to limit the position of the windshield guide member, and cooperate with the windshield rack 24 pivotally connected to the windshield plate 21 to jointly control the position of the windshield rack 24, and utilize the change in the position of the windshield rack 24 in its length direction to change the position of the pivot point of the windshield rack 24 of the windshield plate 21, thereby controlling the angle of the windshield plate 21 relative to the wind guide plate 11.
[0057] In another implementation, the lifting assembly can also be implemented in other ways to cause the windshield rack 24 to mesh with the windshield gear 23. For example, a torsion spring can be arranged between the windshield plate 21 and the windshield rack 24. When the torsion spring is deformed, a force is applied to increase the angle between the windshield plate 21 and the windshield rack 24. At the same time, a torsion spring is also arranged between the windshield plate 21 and the wind deflector 11. When the torsion spring is deformed, a force is applied to increase the angle between the windshield plate 21 and the wind deflector 11.
[0058] like Figure 2 and Figure 4 As shown, preferably, the guide groove 31 is an arc-shaped groove, and the guide groove 31 is configured so that when the windshield guide member moves along the guide groove 31 , the windshield rack 24 engages with the windshield gear 23 .
[0059] The arc-shaped groove can be adapted to the motion trajectory of one end of the wind shield 21, so that the wind shield rack 24 can be driven to move along the length direction by controlling the wind shield motor 22 to drive the gear to rotate, thereby controlling the opening angle of the wind shield 21 relative to the wind guide plate 11, and then controlling the proportion of the wind shield 21 blocking the air outlet, thereby preventing the air outlet from discharging air forward. At the same time, the wind shield 21 and the wind guide plate 11 form an opening area with an angle at the edges of both ends of the air outlet.
[0060] like Figure 2 and Figure 4 As shown, preferably, the center of the guide groove 31 is the position of the pivot point between the wind guide plate 11 and the wind shield plate 21 when the wind guide plate 11 is opened to the maximum extent.
[0061] The center of the guide groove 31 is the center of the pivotal position of the air guide plate 11 and the wind shield plate 21 when the air guide plate 11 is opened to the maximum extent. It can be achieved that when the air guide plate 11 is opened to the maximum extent, if the air volume of the air outlet is adjusted and the blocked area of the air outlet is changed so that the air is only discharged from the air outlet to the side, it is only necessary to adjust the position of the wind shield rack 24, and there is no need to use the air guide motor 12 to drive the air guide plate 11 to move. Only one motor is needed to realize this function, which is beneficial to reduce the noise emitted by the air conditioner at this time and improve the user experience.
[0062] like Figure 2 and Figure 4 As shown, preferably, the windshield guide is eccentrically arranged on the windshield rack 24 at the pivot point between the windshield rack 24 and the windshield plate 21 .
[0063] By making the position of the windshield guide on the windshield rack 24 different from the pivot point between the windshield rack 24 and the windshield plate 21, the position of the windshield rack 24 can be determined by the windshield guide and the pivot point to ensure that the windshield rack 24 is engaged with the windshield gear 23.
[0064] like Figure 2 and Figure 4 As shown, preferably, the windshield rack 24 is an arc-shaped rack.
[0065] By using an arc-shaped rack, when the angle of the wind guide plate 11 remains unchanged and the angle of the wind shield plate 21 relative to the wind guide plate 11 changes, the wind shield rack 24 can always maintain engagement with the wind shield gear 23, so that only the wind shield motor 22 needs to be driven when realizing front wind shielding and side air outlet, thereby helping to reduce the noise emitted by the air conditioner at this time and improve the user experience.
[0066] like Figure 2 and Figure 4 As shown, preferably, the wind shield 21 is a flat plate.
[0067] When the air conditioner is blowing air normally, the angle between the wind shield 21 and the air guide plate 11 is minimized as much as possible. The wind shield 21 is a flat plate, which can reduce the interference of the air guide mechanism on the airflow when the air conditioner is blowing air forward normally.
[0068] The operating principle of this embodiment is:
[0069] like Figure 2 , Figure 3 and Figure 4 As shown, the wind deflector 11 can rotate under the drive of the wind deflector motor 12 to achieve up and down wind sweeping. When the wind deflector motor 12 rotates, the wind deflector gear 23 and the wind deflector rack 24 are meshed to drive the wind deflector guide member on the wind deflector rack 24 to move in the guide groove 31, thereby driving the wind deflector 21 to rotate on the wind deflector 11. By controlling the position of the wind deflector 21, the size of the forward and side wind output can be controlled, thereby controlling the forward air supply volume and the side air supply volume.
[0070] Since the side edges of the wind deflector 11 and the wind shield 21 form a variable angle, air can be supplied to the side. By controlling the position of the wind shield 21 through the wind shield motor 22, the angle can be changed to change the front air supply and the side air supply at the same time.
[0071] like Figure 2 and Figure 3 As shown, when the side angle between the air guide plate 11 and the wind shield plate 21 is the position shown in the figure, the front position of the air outlet is blocked by the wind shield plate 21, the forward air supply volume is basically zero, the front air outlet of the indoor unit is in a zero wind state, and the side air supply volume is the largest at this time.
[0072] Figure 5 This is a schematic diagram of the structure of a wall-mounted air conditioner indoor unit used by the indoor unit air outlet mechanism provided in the first embodiment of the present invention, which is in a forward air outlet state at this time; Figure 6This is a schematic diagram of the structure of a wall-mounted air conditioner indoor unit used in the indoor unit air outlet mechanism provided in the first embodiment of the present invention, in which the air outlet is closed at this time; Figure 4 and Figure 5 As shown, the wind deflector 11 is opened to the maximum angle, and the wind deflector 11 and the wind shield 21 are in a folded state, that is, the angle between the wind deflector 11 and the wind shield 21 is the smallest, and the forward air outlet area of the air outlet is the largest. At this time, the wind deflector 11 is controlled to move alone, while the wind shield motor 22 is controlled to remain stationary, and the wind deflector 11 is closed. At this time, Figure 6 Therefore, by controlling the position of the wind deflector 11 and the wind shield 21, the front and side air outlets can be controlled to improve the user experience.
[0073] Embodiment 2:
[0074] Embodiment 2 further provides an air conditioner, comprising the above-mentioned indoor unit air outlet mechanism.
[0075] By arranging the above-mentioned indoor unit air outlet mechanism in the air conditioner, the air conditioner accordingly has all the advantages of the above-mentioned indoor unit air outlet mechanism, which will not be described one by one here.
[0076] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.
[0077] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0078] In the above embodiments, the descriptions of directions such as “upper” and “lower” are all based on the drawings.
[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention.
[0080] Thus, the present invention will not be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An indoor unit air outlet mechanism, characterized in that: include: An air guide plate (11) is drivingly connected to an air guide motor (12); The wind shield (21) is pivotally connected to the free end of the wind guide plate (11), and the wind guide plate (11) is transmission-connected to a wind shield motor (22) arranged on the inner machine body (30). The wind shield (21) is located on the side of the wind guide plate (11) facing the larger part of the air outlet cross section.
2. The indoor unit air outlet mechanism according to claim 1, characterized in that: The windshield motor (22) is drivingly connected to a windshield gear (23), the windshield gear (23) is meshed with a windshield rack (24), and the windshield rack (24) is pivotally connected to the windshield plate (21).
3. The indoor unit air outlet mechanism according to claim 2, characterized in that: The wind shielding gear (23) is located below the wind shielding rack (24), and the indoor unit air outlet mechanism comprises a lifting component, and the lifting component is used to drive the wind shielding rack (24) to engage with the wind shielding gear (23).
4. The indoor unit air outlet mechanism according to claim 3, characterized in that: The lifting assembly comprises a windshield guide member, which is connected to the windshield rack (24); the windshield guide member is configured to be able to move along a guide groove (31) provided on the inner machine body (30).
5. The indoor unit air outlet mechanism according to claim 4, characterized in that: The guide groove (31) is an arc-shaped groove, and the guide groove (31) is configured such that when the windshield guide member moves along the guide groove (31), the windshield rack (24) engages with the windshield gear (23).
6. The indoor unit air outlet mechanism according to claim 4, characterized in that: The center of the guide groove (31) is the position of the pivot point between the wind guide plate (11) and the wind shield plate (21) when the wind guide plate (11) is opened to the maximum extent.
7. The indoor unit air outlet mechanism according to claim 4, characterized in that: The windshield guide member is eccentrically arranged on the windshield rack (24) at the pivot point between the windshield rack (24) and the windshield plate (21).
8. The indoor unit air outlet mechanism according to claim 3, characterized in that: The wind shielding rack (24) is an arc-shaped rack.
9. The indoor unit air outlet mechanism according to any one of claims 1 to 8, characterized in that: The wind shield (21) is a flat plate.
10. An air conditioner, characterized in that: The air conditioner comprises a wall-mounted air conditioner indoor unit, and the wall-mounted air conditioner indoor unit comprises an air outlet and an indoor unit air outlet mechanism according to any one of claims 1 to 9 arranged at the air outlet.