Wall-mounted indoor unit, air conditioner and control method

Abstract

The invention provides a wall-mounted indoor unit, an air conditioner and a control method. The wall-mounted indoor unit comprises a shell, a plurality of heat exchangers and a plurality of centrifugal fans are arranged in the shell, a third air opening is formed in the top of the shell, and the heat exchangers are located between the centrifugal fans and the third air opening; the centrifugal fan comprises a volute, the volute is provided with a first air outlet and a second air outlet, an opening of the first air outlet faces the heat exchanger, an opening of the second air outlet is opposite to the heat exchanger, a volute tongue is arranged in the volute, the volute tongue can move in the volute, and the first air outlet and the second air outlet are arranged in the volute. The volute tongue is provided with a first position for sealing the first air outlet and a second position for sealing the second air outlet. According to the air conditioner, the technical problem that in the prior art, a switching structure of an air conditioner with a reversible air supply duct occupies part of the air duct space, and consequently the user experience is poor can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a wall-mounted indoor unit, an air conditioner, and a control method. Background Art

[0002] With the continuous advancement of air conditioning technology, users have placed higher demands on comfort, energy efficiency, and intelligence. However, in actual use, the distribution of hot and cold air during cooling and heating still remains problematic, resulting in a suboptimal user experience. For example, in cooling mode, cold air sinks to the bottom of the room, while hot air accumulates at the top, causing a "hot head, cold feet" phenomenon. In heating mode, hot air rises to the top of the room, while cold air accumulates at the bottom, exacerbating the "hot head, cold feet" problem. These issues severely impact the user experience.

[0003] To address this issue, air conditioners with reversible air ducts have gradually emerged on the market. These air conditioners change the airflow direction so that during cooling, cold air is delivered from the top and gradually sinks to the bottom of the room; during heating, hot air is delivered from the bottom and gradually rises to the top of the room, thus reducing the phenomenon of hot and cold stratification. However, while this design improves comfort to a certain extent, it also brings new technical challenges.

[0004] Specifically, air conditioners with reversible air ducts typically require a smaller air inlet area to achieve reversible switching of the ducts. This means that reversible air supply requires more switching mechanisms and a more complex duct system, which takes up some duct space. This significantly increases duct resistance. At the same size, the air volume cannot meet the needs of rapid cooling or heating, affecting the air conditioner's operating efficiency and user experience. To achieve the required air volume, it is usually necessary to increase the duct size or the overall size of the air conditioner, which runs counter to the current trend of miniaturization and lightweighting of air conditioners.

[0005] Since the air conditioner with reversible air supply duct in the prior art has more switching mechanisms and a more complex duct system, it will occupy part of the duct space and there are technical problems such as affecting the operating efficiency and user experience of the air conditioner. Therefore, the present invention studies and designs a wall-mounted indoor unit, air conditioner, and control method. Summary of the Invention

[0006] Therefore, the present invention provides a wall-mounted indoor unit, an air conditioner, and a control method, which can solve the technical problem in the prior art that the switching structure of the air conditioner with a reversible air supply duct occupies part of the duct space, resulting in a poor user experience.

[0007] In order to solve the above problems, the present invention provides a wall-mounted indoor unit, comprising: a housing, a plurality of heat exchangers and a plurality of centrifugal fans are arranged in the housing, a third air outlet is provided at the top of the housing, and the heat exchanger is located between the centrifugal fans and the third air outlet;

[0008] The centrifugal fan includes a volute, which has a first air outlet and a second air outlet. The opening of the first air outlet faces the heat exchanger, and the opening of the second air outlet faces away from the heat exchanger. A volute tongue is provided in the volute, and the volute tongue can move in the volute. The volute tongue has a first position for closing the first air outlet and a second position for closing the second air outlet.

[0009] In some embodiments, there is a first connecting line between the first air outlet and the center and the center of the volute, and there is a second connecting line between the second air outlet and the center and the center of the volute, and there is an angle between the first connecting line and the second connecting line, and the angle is 140°±5°.

[0010] In some embodiments, the housing further has a first air outlet and a second air outlet, wherein the first air outlet is located below the housing, and the second air outlet is located at the front side of the housing.

[0011] In some embodiments, when the volute tongue is in the first position, the air flow flows in from the third air inlet, flows through the heat exchanger and the second air outlet, and then flows out from the second air outlet; when the volute tongue is in the second position, the air flow flows in from the first air outlet, flows through the first air outlet and the heat exchanger, and then flows out from the third air outlet.

[0012] In some embodiments, there are two heat exchangers, and the two heat exchangers are arranged in a V shape, and the opening of the V shape faces the centrifugal fan. Along the axial direction of the volute, multiple centrifugal fans are arranged at intervals, and the central axis of the volute is perpendicular to the central axis of the third air outlet.

[0013] In some embodiments, a guide plate is provided on one side of the volute tongue along the axial direction of the volute, a through hole is provided on the guide plate, the through hole extends along the circumference of the volute, and a rack is provided on the inner wall of the through hole, the rack extends along the extension direction of the through hole, a driving member is provided on the volute, a driving shaft of the driving member passes through the volute and extends into the through hole, a gear is provided on the driving shaft of the driving member, and the gear is engaged with the rack.

[0014] In some embodiments, the volute tongue is arc-shaped, and the volute tongue matches the volute casing.

[0015] In some embodiments, the volute tongue has a first end and a second end, the first end is provided with a baffle, the baffle extends back to the center of the volute, and there is a second angle between the baffle and the volute tongue, and the second angle is an acute angle.

[0016] In some embodiments, when the volute tongue is in the first position, the baffle is connected to the inner wall of the first air outlet, and the second end is connected to the inner wall of the volute after passing through the second air outlet; when the volute tongue is in the second position, the baffle is connected to the inner wall of the second air outlet, and the second end is connected to the inner wall of the volute after passing through the first air outlet.

[0017] The present invention also provides an air conditioner, comprising the above-mentioned wall-mounted indoor unit.

[0018] The present invention also provides the above-mentioned air conditioner control method, which is implemented according to the following steps:

[0019] a determination step of determining an operating mode of the air conditioner;

[0020] The control step comprises controlling the volute tongue to move to the first position when the air conditioner is in heating mode, and controlling the volute tongue to move to the second position when the air conditioner is in cooling mode.

[0021] The wall-mounted indoor unit, air conditioner, and control method provided by the present invention have the following beneficial effects:

[0022] Because the volute tongue has a first position that closes the first air outlet and a second position that closes the second air outlet, a reversible air supply structure of the centrifugal fan is realized. Reversible air supply can be achieved only by controlling the position of the volute tongue 7. The structure is simple and does not require unnecessary switching structures and air duct structures. It can effectively increase the air volume and air pressure, reduce air duct resistance, ensure efficient air circulation in a limited space, and improve the overall performance of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. Those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0024] Figure 1 This is a schematic diagram of the structure of the wall-mounted indoor unit of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the wall-mounted indoor unit of the present invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the centrifugal fan in the wall-mounted indoor unit of the present invention. Figure 1 ;

[0027] Figure 4 This is a schematic diagram of the structure of the centrifugal fan in the wall-mounted indoor unit of the present invention. Figure 2 ;

[0028] Figure 5 It is a schematic structural diagram of the volute tongue in the wall-mounted indoor unit of the present invention;

[0029] Figure 6 Schematic diagram of the movement position of the volute tongue in the wall-mounted indoor unit of the present invention;

[0030] Figure 7 It is an assembly structure diagram of a control method for an air conditioner according to another embodiment of the present invention.

[0031] The accompanying drawings are:

[0032] 1. Shell; 2. Heat exchanger; 3. Centrifugal fan; 4. First air outlet; 5. Second air outlet; 6. Third air outlet; 7. Volute tongue; 8. Through hole; 9. Baffle; 10. Guide plate. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] See also Figure 1-7 As shown, according to an embodiment of the present invention, a wall-mounted indoor unit is provided, comprising: a shell 1, wherein a plurality of heat exchangers 2 and a plurality of centrifugal fans 3 are arranged in the shell 1, a third air outlet 6 is provided on the top of the shell 1, and the heat exchanger 2 is located between the centrifugal fan 3 and the third air outlet 6; the centrifugal fan 3 comprises a volute, wherein the volute has a first air outlet and a second air outlet, the opening of the first air outlet faces the heat exchanger 2, and the opening of the second air outlet faces away from the heat exchanger 2, a volute tongue 7 is provided in the volute, the volute tongue 7 can move in the volute, and the volute tongue 7 has a first position for closing the first air outlet and a second position for closing the second air outlet.

[0038] In this technical solution, the volute tongue 7 has a first position that closes the first air outlet and a second position that closes the second air outlet, thereby realizing a reversible air supply structure of the centrifugal fan 3. Reversible air supply can be achieved only by controlling the position of the volute tongue 7. The structure is simple and does not require redundant switching structures and air duct structures. It can effectively increase the air volume and air pressure, reduce air duct resistance, ensure efficient air circulation in a limited space, and improve the overall performance of the air conditioner.

[0039] In the existing technology, the upper air vent can serve as both the air inlet when discharging downward and the air outlet when discharging upward. The reason for reducing the air inlet area is that in order to achieve reversible air supply, more switching mechanisms and a more complex air duct system are required, which will occupy part of the air duct space.

[0040] In some embodiments, there is a first connecting line between the first air outlet and the center and the center of the volute, and there is a second connecting line between the second air outlet and the center and the center of the volute, and there is an angle between the first connecting line and the second connecting line, and the angle is 140°±5°.

[0041] In this technical solution, an angle is designed between the first connection line and the second connection line, and the angle is 140°±5°, which meets the space, function and performance requirements of the air conditioner, avoids air flow out of the first air outlet, and improves user experience.

[0042] In some embodiments, the housing 1 further has a first air outlet 4 and a second air outlet 5 , wherein the first air outlet 4 is located below the housing 1 , and the second air outlet 5 is located at the front side of the housing 1 .

[0043] In this technical solution, when the air is discharged from the top, the air inlet is the first air outlet 4 at the bottom of the air conditioner, and the air outlet is located at the third air outlet 6 at the top of the air conditioner. The airflow flows to the centrifugal fan 3 and then flows out through the heat exchanger 2; when the air is discharged from the bottom, the air inlet is located at the third air outlet 6 at the top of the air conditioner, and the air outlet is located at the second air outlet 5 on the front side of the air conditioner. The airflow flows to the heat exchanger 2 and then flows out through the centrifugal fan 3.

[0044] In some embodiments, when the volute tongue 7 is in the first position, the air flow flows in from the third air outlet 6, flows through the heat exchanger and the second air outlet, and then flows out from the second air outlet 5; when the volute tongue 7 is in the second position, the air flow flows in from the first air outlet 4, flows through the first air outlet and the heat exchanger, and then flows out from the third air outlet 6.

[0045] In this technical solution, when the air is discharged from the upper side, the third air vent 6 on the top of the air conditioner serves as the upper air outlet, the first air vent 4 on the bottom of the air conditioner serves as the air inlet, and the second air vent 5 on the front side of the air conditioner is closed. When the air is discharged from the lower side, the third air vent 6 on the top of the air conditioner serves as the air inlet, the first air vent 4 is closed, and the second air vent 5 on the front side of the air conditioner serves as the air outlet. The centrifugal fan 2 of the present invention is a double-suction centrifugal fan.

[0046] In some embodiments, there are two heat exchangers 2, and the two heat exchangers 2 are arranged in a V shape, and the opening of the V shape faces the centrifugal fan 3. Along the axial direction of the volute, multiple centrifugal fans are arranged at intervals, and the central axis of the volute is perpendicular to the central axis of the third air outlet 6.

[0047] In some specific embodiments, the fluid domain of the air duct system within an air conditioner's indoor unit is dimensioned based on the overall unit dimensions, with a length, width, and height of 690 mm, 240 mm, and 310 mm, respectively. This dimension ensures sufficient space for arranging the relevant duct components for reversible air supply within the indoor unit of the air conditioner, based on a double-suction centrifugal fan, while maintaining appropriate distances between the various components, ensuring optimal performance of the entire fan and duct system under target operating conditions.

[0048] In some embodiments, due to the size limitations of the air conditioner's indoor unit, the impeller diameter cannot be too large. The impeller height to diameter ratio of a centrifugal fan is within a reasonable range of 0.25 to 0.7. Therefore, the impeller height cannot be too high. Given the length of the indoor unit, the arrangement of three impellers can reduce the blade height, thereby improving efficiency and reducing noise. Double-suction centrifugal fans draw air from both sides.

[0049] In some specific embodiments, the wall-mounted indoor unit of the present invention utilizes three double-suction centrifugal fans and a top-mounted heat exchanger. To ensure maximum airflow, the heat exchanger is a double-row, 16-unit unit. Consequently, the heat exchanger dimensions are 690 mm wide, 25.5 mm thick, and 290 mm long. Due to the high air speed and pressure of the centrifugal fans, airflow through the heat exchanger exhibits significant high-velocity zones. To ensure that more of the heat exchanger is in this high-velocity zone, the heat exchanger is designed with an asymmetrical V-shape.

[0050] In some embodiments, a guide plate 10 is provided on one side of the volute tongue 7 along the axial direction of the volute, and a through hole 8 is provided on the guide plate 10. The through hole 8 extends along the circumference of the volute, and a rack is provided on the inner wall of the through hole 8. The rack extends along the extension direction of the through hole 8. A driving member is provided on the volute, and a driving shaft of the driving member passes through the volute and extends into the through hole 8. A gear is provided on the driving shaft of the driving member, and the gear is engaged with the rack.

[0051] In this technical solution, when the volute tongue 7 moves, the driving member rotates the volute tongue 7 in the volute through the cooperation of the gear and the rack, thereby realizing the switching of the volute tongue 7 between the first position and the second position. Furthermore, the volute tongue 7 can also be set outside the volute, and the structure and principle are the same as those of the volute tongue 7 set inside the volute. The driving member can be a motor

[0052] A guide plate 10 is built on one side of the volute tongue 7, and a through hole 8 with a gear is dug out on the guide plate 10. The gear cooperates with the motor arranged outside the volute to realize the sliding of the volute tongue. In order to ensure that the trajectory of the through hole 8 with a rack can be fixed through the position of the motor, the through hole 8 is positioned by two concentric arc segments with the same rotation center, that is, the point where the plane is located on the rotation axis of the centrifugal fan blade. The central angle of the circle is consistent with the angle of the two outlets of the volute to ensure that the length of the through hole is long enough so that the volute tongue can move to the corresponding working position. When downward air outlet is required, the volute tongue is controlled at position 1, serving as the volute tongue of the lower outlet, and blocking the upper outlet, and forming an airtight complete volute with the lower half of the volute. Similarly, when upward air outlet is required, the position of the rotating volute tongue is controlled at position 2, forming a complete volute structure with the upper half of the volute.

[0053] In some embodiments, the volute tongue 7 is arc-shaped, and the volute tongue 7 matches the volute casing.

[0054] In this technical solution, to achieve reversible upward and downward airflow from the same volute, both air outlets share a single volute tongue 7. This tongue 7 rotates around its center. When discharging upward, it acts as the volute tongue for the upper outlet, blocking the lower outlet. When discharging downward, it acts as the volute tongue for the lower outlet, blocking the upper outlet. Within the volute is a double-suction centrifugal fan blade with a diameter of 120 mm and a height of 110 mm.

[0055] In some embodiments, the volute tongue 7 has a first end and a second end, the first end is provided with a baffle 9, the baffle 9 extends back to the center of the volute, and there is a second angle between the baffle 9 and the volute tongue 7, and the second angle is an acute angle.

[0056] In this technical solution, a baffle 9 is provided through the first end, and the baffle 9 extends back to the center of the volute. There is a second angle between the baffle 9 and the volute tongue 7, and the second angle is an acute angle. Since the angles of the two air outlets of the volute are not 180 degrees and the volute trajectory is gradual, the distances between the two outlets and the volute tongue are different, and a baffle 9 with a diffusion section is required to make the volute have good air tightness.

[0057] In some embodiments, when the volute tongue 7 is in the first position, the baffle 9 is connected to the inner wall of the first air outlet, and the second end is connected to the inner wall of the volute after passing through the second air outlet; when the volute tongue 7 is in the second position, the baffle 9 is connected to the inner wall of the second air outlet, and the second end is connected to the inner wall of the volute after passing through the first air outlet.

[0058] In this technical solution, refer to Figure 6The baffle 9 is to meet the needs of the expansion section of the volute and guide the air flow blown out from the fan blade. The baffle 9 can close the air duct of the first air outlet or the second air outlet to achieve reversible air supply of the centrifugal fan.

[0059] The wall-mounted indoor unit of the present invention realizes a solution for reversible air supply of the indoor unit of the air conditioner, and an air duct system and its layout for realizing the solution for reversible air supply of the indoor unit of the air conditioner. Significantly improves air volume and air pressure, and optimizes air duct resistance: The double-suction centrifugal fan design can effectively increase air volume and air pressure. At the same time, by optimizing the air duct layout and rotating volute structure, the air duct resistance is reduced, ensuring efficient air circulation in a limited space and improving the overall performance of the air conditioner. Improves the distribution of hot and cold air and enhances user comfort: Through the reversible air supply design, a uniform distribution of cold and hot air is achieved, effectively solving problems such as "hot head and cold feet", and providing users with a more comfortable and uniform indoor environment.

[0060] The present invention also provides an air conditioner, comprising the above-mentioned wall-mounted indoor unit.

[0061] The air conditioner of this invention addresses the problems of high duct resistance and insufficient air volume in existing reversible air supply designs for indoor air conditioners. These issues directly lead to low air conditioner efficiency during operation, impacting the user experience. By utilizing a double-suction centrifugal fan and a rotating volute structure, the air duct layout is optimized, significantly increasing air volume and pressure while reducing duct resistance, thus resolving the pain points of the existing technology.

[0062] The air conditioner of this invention features a reversible air supply design within the indoor unit. It utilizes multiple double-suction centrifugal fans and a rotating volute structure to optimize the air duct layout and increase air volume and pressure. This design is particularly suitable for wall-mounted air conditioners, enabling efficient air circulation within limited spaces, improving overall performance and user comfort.

[0063] The air conditioner of this invention utilizes a dual-suction centrifugal fan and a rotating volute structure to optimize the air duct layout and increase air volume and pressure. This design not only solves the existing problems of high duct resistance and insufficient air volume, but also achieves uniform distribution of cold and hot air through intelligent control methods, effectively solving the problem of "hot head and cold feet" and significantly improving the user experience.

[0064] The present invention also provides a control method for the above-mentioned air conditioner, which is implemented according to the following steps:

[0065] a determination step of determining an operating mode of the air conditioner;

[0066] The control step is to control the volute tongue 7 to move to the first position when the air conditioner is in heating mode, and to control the volute tongue 7 to move to the second position when the air conditioner is in cooling mode.

[0067] In this technical solution, when a user turns on the air conditioner, the air conditioner's internal unit detects the indoor temperature using a sensor and determines whether it is in heating or cooling mode. In heating mode, the system defaults to downward airflow. It then determines whether the rotating volute 7 is in the first position. If so, the fan starts, and the air conditioner's internal unit begins delivering air downward. If the rotating volute 7 is in the second position, the system first switches the volute 7 to the first position before activating the fan. In cooling mode, the system defaults to upward airflow. It then determines whether the rotating volute 7 is in the second position. If so, the fan starts, and the air conditioner's internal unit begins delivering air upward. If the rotating volute 7 is in the first position, the system first switches the volute 7 to the second position before activating the fan. It should be emphasized that the above control process is automated by the system control program after powering on. Users can manually adjust the airflow direction for different operating modes based on their preferences by entering their desired settings on the remote control. The next time the air conditioner is started again, the above control process will be repeated.

[0068] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A wall-mounted indoor unit, characterized in that: include: A shell (1), wherein a plurality of heat exchangers (2) and a plurality of centrifugal fans (3) are arranged in the shell (1), a third air outlet (6) is provided at the top of the shell (1), and the heat exchanger (2) is located between the centrifugal fans (3) and the third air outlet (6); The centrifugal fan (3) comprises a volute, the volute having a first air outlet and a second air outlet, the opening of the first air outlet facing the heat exchanger (2), and the opening of the second air outlet facing away from the heat exchanger (2), a volute tongue (7) is provided in the volute, the volute tongue (7) is movable in the volute, and the volute tongue (7) has a first position for closing the first air outlet and a second position for closing the second air outlet.

2. The wall-mounted indoor unit according to claim 1, characterized in that: There is a first connecting line between the first air outlet and the center and the center of the volute, and there is a second connecting line between the second air outlet and the center and the center of the volute. There is an angle between the first connecting line and the second connecting line, and the angle is 140°±5°.

3. The wall-mounted indoor unit according to claim 1, characterized in that: The housing (1) further comprises a first air outlet (4) and a second air outlet (5), wherein the first air outlet (4) is located below the housing (1) and the second air outlet (5) is located at the front side of the housing (1).

4. The wall-mounted indoor unit according to claim 3, characterized in that: When the volute tongue (7) is located at the first position, the air flow flows in from the third air port (6), flows through the heat exchanger and the second air outlet, and then flows out from the second air port (5); when the volute tongue (7) is located at the second position, the air flow flows in from the first air outlet (4), flows through the first air outlet and the heat exchanger, and then flows out from the third air port (6).

5. The wall-mounted indoor unit according to claim 1, characterized in that: There are two heat exchangers (2), and the two heat exchangers (2) are arranged in a V shape, and the opening of the V shape faces the centrifugal fan (3). Along the axial direction of the volute, multiple centrifugal fans are arranged at intervals, and the central axis of the volute is perpendicular to the central axis of the third air outlet (6).

6. The wall-mounted indoor unit according to claim 1, characterized in that: Along the axial direction of the volute, a guide plate (10) is provided on one side of the volute tongue (7), and a through hole (8) is provided on the guide plate (10), and the through hole (8) extends along the circumference of the volute, and a rack is provided on the inner wall of the through hole (8), and the rack extends along the extension direction of the through hole (8). A driving member is provided on the volute, and a driving shaft of the driving member passes through the volute and extends into the through hole (8), and a gear is provided on the driving shaft of the driving member, and the gear is engaged with the rack.

7. The wall-mounted indoor unit according to claim 6, characterized in that: The volute tongue (7) is arc-shaped, and the volute tongue (7) matches the volute.

8. The wall-mounted indoor unit according to claim 6, characterized in that: The volute tongue (7) has a first end and a second end, the first end is provided with a baffle (9), the baffle (9) extends back to the center of the volute, and a second angle is formed between the baffle (9) and the volute tongue (7), and the second angle is an acute angle.

9. The wall-mounted indoor unit according to claim 8, characterized in that: When the volute tongue (7) is in the first position, the baffle (9) is connected to the inner wall of the first air outlet, and the second end is connected to the inner wall of the volute after passing through the second air outlet; when the volute tongue (7) is in the second position, the baffle (9) is connected to the inner wall of the second air outlet, and the second end is connected to the inner wall of the volute after passing through the first air outlet.

10. An air conditioner, characterized in that: The invention comprises the wall-mounted indoor unit according to any one of claims 1 to 9.

11. The air conditioner control method according to claim 10, wherein: Follow these steps to implement: a determination step of determining an operating mode of the air conditioner; The control step comprises controlling the volute tongue (7) to move to the first position when the air conditioner is in a heating mode, and controlling the volute tongue (7) to move to the second position when the air conditioner is in a cooling mode.

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