Volute tongue mechanism, air conditioner with volute tongue mechanism and control method of volute tongue mechanism

Abstract

The invention discloses a volute tongue mechanism which comprises a volute tongue assembly and a film covering assembly, the film covering assembly comprises a thin film and a control unit for controlling the thin film to be rolled or unfolded, and under the control of the control unit, the thin film can switch an air guide face of the volute tongue assembly from a full shielding state, a partial shielding state and a full exposure state. According to the volute tongue mechanism and the air conditioner thereof, the control unit is adopted to control the unfolding area of the thin film, and therefore the air guide face of the volute tongue is shielded by different sizes. When the rotating speed of the fan of the air conditioner is high, the thin film shields all the volute tongue, at the moment, the air outlet amount is maximum, cooling is faster, and a user feels cooler. When the rotating speed of the draught fan is low, the thin film is partially or completely exposed out of the air guide face, at the moment, the volute tongue guides air, output of the air is more uniform, and noise is lower. According to the control method of the volute tongue mechanism, the film shielding area is flexibly adjusted according to the wind speed so as to actively adapt to different wind speeds, and user experience is better.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a volute mechanism and an air conditioner and a control method thereof. Background Art

[0002] The volute tongue assembly is a commonly used air guide mechanism in the indoor unit of the air conditioner. The height of the tooth protrusion on the surface of the volute tongue can change the air volume or noise at different fan speeds, so it has the function of adjusting the air outlet. For example, the Chinese patent, the patent publication number is CN117386668 B, which discloses a volute tongue assembly and an air conditioner. The volute tongue assembly includes a movable tooth protrusion and a driving mechanism; the movable tooth protrusion includes a reel and a tooth protrusion connected to each other; the tooth protrusion is located in the circumferential position of the reel, and the tooth protrusion protrudes forward in the direction of its own rotation. The volute tongue assembly includes a volute tongue, which includes a tongue root and a diffuser section connected in a curved manner, and a first air guide surface is arranged on the outer side of the tongue root; a connecting hole connecting the inner and outer sides of the tongue root is provided; the movable tooth protrusion includes a tooth protrusion, and the tooth protrusion protrudes on the first air guide surface through the connecting hole; the driving mechanism can drive the movable tooth protrusion to move and change the protrusion height of the tooth protrusion relative to the first air guide surface. The air conditioner includes a volute tongue assembly. The shape of the tooth protrusion of the volute tongue of the invention is variable, which can better adapt to different requirements under different environments and different speeds, and improve user experience.

[0003] However, in reality, different wind speeds require different shapes of volute tongue teeth. When the fan is running at low speed, the noise level is lower, and users are more concerned about the sound quality of the air conditioner. Using a volute tongue with a deeper tooth depth will help improve uneven air flow and howling problems in harsh environments. When the fan is running at high speed, heat exchange is accelerated, and users are more interested in lowering the room temperature as quickly as possible. At this time, using a volute tongue with a shallower tooth depth or a smoother air guide surface will help increase the air volume and cool experience. Obviously, the existing volute tongue with teeth cannot adapt to the different air supply requirements at different fan speeds. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a volute-tongue mechanism and an air conditioner and a control method thereof, so as to solve the technical problem that the existing volute-tongue assembly cannot adapt to different requirements under different wind speeds.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides a volute tongue mechanism, which includes: a volute tongue assembly and a coating assembly, the coating assembly including a film and a control unit for controlling the retraction or unfolding of the film, under the control of the control unit, the film can switch the wind guide surface of the volute tongue assembly between full shielding, partial shielding and full exposure states.

[0007] Wherein, the control unit controls the film to unfold or retract along the width direction of the volute tongue assembly.

[0008] Wherein, the film is a sound-absorbing film.

[0009] Wherein, the control unit includes: a front-laminated reel, a film-pulling belt and a first driving module, one end of the film-pulling belt is connected to the film, and the other end is connected to the rear-laminated reel, one side of the film is wound around the front-laminated reel, and the output shaft of the first driving module is connected to the front-laminated reel.

[0010] Wherein, the film-drawing belt is an elastic belt.

[0011] Wherein, the control unit further includes a second driving module and a post-lamination reel controlled by the second driving module.

[0012] Wherein, the film-drawing belt is wound around the outer wind guide surface of the volute tongue assembly.

[0013] Wherein, the first driving module and the second driving module are both driving motors, and the output shafts of the driving motors are respectively connected to the pre-film-covering reel and the retroperitoneal reel.

[0014] There are two groups of control units, and the two groups of control units are respectively connected to two opposite sides in the width direction of the film.

[0015] In a second aspect, an embodiment of the present invention further provides an air conditioner, comprising a volute mechanism as described in any one of the above.

[0016] In a third aspect, an embodiment of the present invention further provides a control method for a snail tongue mechanism, the control method comprising the following steps:

[0017] Obtaining the fan speed of the air conditioner, and adjusting the shielding area of ​​the air guide surface of the volute tongue assembly according to the fan speed;

[0018] When the speed of the fan is lower than the set threshold, the control unit controls the film to enter a fully retracted state, so that the wind guide surface is fully exposed;

[0019] When the speed of the fan is higher than a set threshold, the control unit controls the film to enter a partially or fully blocked state, so that the wind guide surface of the volute tongue assembly is partially or fully blocked by the film.

[0020] Wherein, in the step of controlling the film to enter a fully wound state or a partially or fully blocked state by the control unit, the rotation speed of the driving module for controlling the winding and unwinding of the film maintains a set difference, so that the film is in a tensioned state.

[0021] The volute tongue mechanism and the air conditioner thereof of the present invention use a control unit to control the unfolding area of ​​the film, thereby shielding the air guide surface of the volute tongue in different sizes. When the fan speed of the air conditioner is high, the film completely shields the volute tongue, at which time the air output is maximum, the temperature drops faster, and the user feels cooler. When the fan speed is low, the film partially or completely exposes the air guide surface, and the volute tongue guides the wind, making its output more uniform and less noisy. The control method of the volute tongue mechanism flexibly adjusts the film shielding area according to the wind speed, thereby providing a better user experience.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial structural schematic diagram of an air conditioner according to an embodiment of the present invention (also a schematic diagram of the film of the volute mechanism being in a fully shielded state).

[0024] Figure 2 It is a partial structural schematic diagram from another angle of the air conditioner according to an embodiment of the present invention (also a structural schematic diagram of the film of the volute mechanism being in a partially shielded state).

[0025] Figure 3 It is a schematic diagram of a partial structure of the air conditioner according to an embodiment of the present invention from another angle (also a schematic diagram showing that the air guide surface of the volute-tongue mechanism is in a fully exposed state).

[0026] Figure 4 It is a partial structural exploded diagram of an air conditioner according to an embodiment of the present invention.

[0027] Figure 5 Schematic diagram of the structure of the volute tongue mechanism according to an embodiment of the present invention.

[0028] Figure 6 for Figure 5 The enlarged structural schematic diagram of local A is shown.

[0029] Figure 7 2 is a schematic structural diagram of the volute tongue mechanism from another perspective of an embodiment of the present invention.

[0030] Figure 8 This is a structural schematic diagram of a film of a volute-tongue mechanism according to an embodiment of the present invention being in a fully shielded state.

[0031] Fig. 9 for Figure 8 The enlarged structural schematic diagram of local B is shown.

[0032] Description of reference numerals:

[0033] Air conditioner 100, bottom shell 1, installation cavity 11, volute tongue assembly 2, air guide surface 21, end 22, coating assembly 3, film 31, front coating reel 32, first drive module 33, film pulling belt 34, second drive module 35, rear coating reel 36. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] The following will be combined with the 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0041] The existing volute tongue assembly generally drives the volute tongue and the tooth protrusion to rotate through a driving device, and adjusts the height of the tooth protrusion protruding from the surface of the volute tongue, thereby adjusting the output wind force characteristics according to different needs. However, the shape of the tooth protrusion for different wind speeds also has an impact. Therefore, based on the above needs, this embodiment provides a volute tongue mechanism.

[0042] See also Figures 1 to 9 , this embodiment discloses a volute tongue mechanism, which includes: a volute tongue component 2 and a film component 3, the film component 3 includes a film 31 and a control unit for controlling the film 31 to be rolled up or unfolded, under the control of the control unit, the film 31 can switch between full shielding, partial shielding and full exposure of the air guide surface of the volute tongue component 2. Compared with the existing control of the protrusion height of the tooth protrusion to change the tooth depth to adapt to the air outlet requirements of different wind speeds, this embodiment uses the film 31 to block the air guide surface 21 of the volute tongue component 2, thereby changing the tooth shape on the air guide surface 21 to adapt to the air outlet requirements of different wind speeds.

[0043] The volute tongue mechanism of this embodiment changes the tooth-convex shape of the wind guide surface 21 of the volute tongue assembly 2 by shielding the wind guide surface of the volute tongue assembly 2 with the film 31, thereby adapting to functional requirements under different wind speeds.

[0044] It should be noted that the volute tongue assembly 2 of the present embodiment includes an integrally formed volute tongue member, that is, a protruding tooth protrusion integrally formed on the air guide surface of the volute tongue. It also includes a tooth protrusion member and a volute tongue member, which use a driving module to control the relative rotation angle between the two to change the height of the tooth protrusion and adjust the tooth depth. Which volute tongue assembly is specifically used depends on the corresponding adjustment settings of different models of air conditioners. The film 31 of the present embodiment and the corresponding control unit can be assembled and adapted with any of the above volute tongue assemblies.

[0045] In this embodiment, if Figure 5 As shown, the control unit controls the film 31 to unfold or retract along the width direction of the volute tongue assembly 2. The advantage of retracting or unfolding along the width direction of the volute tongue assembly 2 is that the film retracting and releasing path is short, and the shielding size of the volute tongue assembly 2 can be quickly adjusted. At the same time, it is also convenient to connect the control unit when assembling inside the air conditioner. It can be understood that in other embodiments, according to the shape of the air guide surface 21 of the volute tongue assembly 2, the retracting and unfolding direction of the film 31 can also be selected according to other directions relative to the air guide surface 21.

[0046] Among them, the film 31 is a sound-absorbing film and also has good ductility. When the film is fully unfolded to completely cover the volute tongue assembly 2, the wind sent out by the fan blows to the surface of the film 31. At this time, in order to reduce the noise generated by the collision of wind and the film 31, the film 31 is made of a material with sound-absorbing function, which can absorb part of the noise and avoid generating loud noise during the operation of the air conditioner, affecting the user experience.

[0047] Please refer again Figure 5 and Figure 6 The control unit includes: a pre-laminated reel 32, a post-laminated reel 36, a film-drawing belt 34, and a first driving module 33. One end of the film-drawing belt 34 is connected to the film 31, and the other end is connected to the post-laminated reel 36. One side of the film 31 is wound around the pre-laminated reel 32. The output shaft of the first driving module 33 is connected to the pre-laminated reel 32. It can be understood that if the film-drawing belt 34 adopts an elastic belt with elastic and retractable characteristics, the post-laminated reel 36 can be removed. At this time, one end of the film-drawing belt 34 can be fixedly connected to the volute tongue assembly 2. The film-drawing belt 34 is used to provide power for the film 31 to move in the opposite direction relative to the pre-laminated reel 32 after the film 31 is pulled toward the pre-laminated reel 32.

[0048] Please combine again Figure 7The film 31 of this embodiment is roughly rectangular in shape according to the shape of its volute tongue assembly 2, and the relative long sides of the film 31 are respectively connected to the front film-laminating reel 32 and the rear film-laminating reel 36, and the front film-laminating reel 32 and the rear film-laminating reel 36 are arranged parallel to each other. The front long side of the film 31 is wound on the front film-laminating reel 32, and the rear long side is fixedly connected to the film-drawing belt 34, and the other end of the film-drawing belt 34 is connected to the rear film-laminating reel 36. Specifically, the front film-laminating reel 32 is arranged at the upper edge of the air guide surface 21 of the volute tongue assembly 2, and the rear film-laminating reel 36 is arranged at the lower edge of the air guide surface.

[0049] When the first driving module 33 starts to rotate, it drives the front film reel 32 to rotate, so that the film 31 starts to be rolled onto the front film reel 32. At this time, the film 31 partially blocks the wind guide surface 21 of the volute tongue component 2. When the reeling is completed, the wind guide surface 21 of the volute tongue component 2 is completely exposed. At this time, the film-drawing belt 34 is elastically pulled up because one end is fixedly connected to the rear film reel 36 or the volute tongue component 2. On the contrary, when the first driving module 33 reversely drives the front film reel 32, the front film reel 32 gradually unwinds outward, and the film-drawing belt 34 simultaneously unfolds the film 31 under the action of its own elastic recovery until it completely covers the wind guide surface 21 of the volute tongue component 2. Of course, after the film 31 is unfolded to the set position and fixed, the film-drawing belt 34 also has the function of providing tension to the film 31.

[0050] The film-drawing belt 34 is an elastic belt, such as a tension spring, an elastic rope, etc., which is an elastic belt-shaped member and is used to provide a restoring force when the film 31 is unfolded again after being rolled up.

[0051] In another embodiment, the control unit further comprises a second driving module 35, the output shaft of the second driving module 35 is connected to the film-covered reel 36, and the other end of the film-drawing belt 34 is wound on the film-covered reel 36. That is, the film-covered reel 32 and the film-covered reel 36 used to drive the film 31 to roll or unfold both use the first driving module 33 and the second driving module 35 with active power. On the one hand, the speed of rolling or unfolding can be increased, and on the other hand, the smoothness of rolling or unfolding can be maintained. In the winding process, according to the winding direction, the first driving module 33 and the second driving module 35 can be used with different rotation speeds, that is, the two can be rotated at a differential speed, so as to keep the film 31 with a certain tension. When the film 312 is in a stationary state, since the first driving module 33 and the second driving module 35 have an automatic locking function, they can make the film 31 in a tensioned state to improve the guiding effect on the air outlet.

[0052] In this embodiment, when the first driving module 33 and the second driving module 35 are provided on the front lamination reel 32 and the rear lamination reel 36, the film 31 can be retracted and released by controlling the first driving module 33 and the second driving module 35. At this time, the film pulling belt 34 may not have elastic properties.

[0053] In another embodiment, the post-lamination reel 36 and the second driving module 35 may also be replaced by a tension member having an automatic retraction, such as a retractable reset assembly consisting of a roller connected to the rotating shaft and a torsion spring.

[0054] Please refer again Fig. 9 The film-drawing belt 34 is wound around the outer wind-guiding surface of the volute tongue component 2, specifically the end 22 of the volute tongue component 2, that is, located at the outer edge of the wind-guiding surface 21. Specifically, the film-drawing belt 34 is arranged in contact with the near outer end of the volute tongue component 2, so that the middle part of the wind-guiding surface 21 of the volute tongue component 2 is not blocked by the film-drawing belt 34, which affects the wind-guiding effect.

[0055] The first driving module 33 and the second driving module 35 are both driving motors, and the output shafts of the driving motors are respectively connected to the pre-filming reel 32 and the post-peritoneal reel 36. The first driving module 33 drives the pre-filming reel 32 to rotate and retract the film 31, and the second driving module 35 drives the post-filming reel 36 to rotate to wind or release the film-drawing belt 34.

[0056] In this embodiment, the control unit is provided with two groups, and the two groups of the control units are respectively connected to two opposite sides in the width direction of the film 31. When only one control unit is provided, a retractable reset component such as a film pulling belt can also be provided on the opposite side to assist in winding or unfolding the film 31.

[0057] Please refer again Figures 1 to 3 The embodiment of the present invention further provides an air conditioner 100, which includes a volute mechanism as described above. Specifically, the volute mechanism is assembled in the installation cavity 11 of the bottom shell 1, the bottom shell 1 is a part of the indoor unit of the air conditioner, and other parts of the indoor unit of the air conditioner 100 are omitted.

[0058] It can be understood that the volute tongue mechanism of this embodiment can be used on any air guide mechanism for adjusting air outlet, so as to improve the air outlet characteristics and meet the needs of users at different wind speeds.

[0059] Please refer again Figures 1 to 3 , which are three different working states when the volute tongue mechanism of the above embodiment is assembled on the bottom shell 1. The working process of the volute tongue mechanism is briefly described below in conjunction with the accompanying drawings:

[0060] Figure 1The film 31 of the volute tongue mechanism completely covers the air guide surface 21 of the volute tongue assembly 2. At this time, for the air conditioner, the fan speed is greater than the set threshold, and a large air volume, rapid cooling or heating is required. Therefore, the film 31 is unfolded to completely block the air guide surface 21 of the volute tongue assembly 2. At this time, the wind can quickly pass through the surface of the film 31 and be output from the air outlet to the environment in a low resistance state. Since the film 31 is made of a sound-absorbing material, it can also reduce the noise generated during the air guide process.

[0061] Figure 2 The film 31 of the volute tongue mechanism partially blocks the air guide surface 21 of the volute tongue assembly 2. At this time, according to different models of air conditioners and equipment parameter requirements, the fan speed is in the middle range. At this time, taking into account the air output and air guide uniformity requirements, the tooth protrusion part on the air guide surface 21 of the volute tongue assembly 2 is blocked and its shape is changed, thereby taking into account the user needs in this state.

[0062] Figure 3 This is a schematic diagram of the structure of the state in which the film 31 of the volute tongue mechanism does not block the air guide surface 21 of the volute tongue assembly 2. At this time, the film 31 is rolled up onto the pre-filming reel 32, and the film-drawing belt 34 is in a pulled-up state. At this time, the speed of the corresponding fan is generally less than the set threshold. At this time, the user is more concerned about the uniformity and low noise of the air outlet. At this time, the film 31 does not block the air guide surface 21, so that the teeth on the air guide surface 21 are all exposed, and the wind is dispersed by the teeth and directed to the air outlet, which can avoid the whistling noise caused by the air guide and make the air outlet more uniform and soothing.

[0063] The embodiment of the present invention further provides a control method for a volute tongue mechanism, the control method comprising the following steps:

[0064] Obtaining the fan speed of the air conditioner, and adjusting the shielding area of ​​the air guide surface of the volute tongue assembly according to the fan speed;

[0065] When the speed of the fan is lower than the set threshold, the control unit controls the film to enter a fully retracted state, so that the wind guide surface is fully exposed;

[0066] When the speed of the fan is higher than a set threshold, the control unit controls the film to enter a partially or fully blocked state, so that the wind guide surface of the volute tongue assembly is partially or fully blocked by the film.

[0067] Wherein, in the step of controlling the film to enter a fully wound state or a partially or fully blocked state by the control unit, the rotation speed of the driving module for controlling the winding and unwinding of the film maintains a set difference, so that the film is in a tensioned state.

[0068] The control method further includes: according to the model of the air conditioner and the operating parameter requirements, the control unit controls the film to be in a semi-expanded state, that is, partially shielding the air guide surface 21, at this time, both noise and air distribution uniformity can be taken into account.

[0069] The volute tongue mechanism and the air conditioner thereof of this embodiment use a control unit to control the unfolding area of ​​the film, thereby shielding the air guide surface of the volute tongue to different sizes. When the fan speed of the air conditioner is high, the film completely shields the volute tongue. At this time, the air output is maximum, the temperature drops faster, and the user feels cooler. When the fan speed is low, the film partially or completely exposes the air guide surface. At this time, the volute tongue guides the wind, making its output more uniform and less noisy. The control method of the volute tongue mechanism flexibly adjusts the film shielding area according to the wind speed, thereby providing a better user experience.

[0070] The above examples are only used to further illustrate the technical content of the present invention, so that readers can understand it more easily, but they do not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention is protected by the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A volute tongue mechanism, characterized in that: include: A volute tongue component and a film covering component, wherein the volute tongue component has a wind guiding surface; The film covering assembly includes a film and a control unit for controlling the film to be rolled up or unfolded. Under the control of the control unit, the film can switch the air guide surface of the volute tongue assembly between full shielding, partial shielding and full exposure.

2. The volute mechanism according to claim 1, characterized in that: The control unit controls the film to be unfolded or retracted along the width direction of the volute tongue assembly.

3. The volute mechanism according to claim 1, characterized in that: The film is a sound-absorbing film.

4. The volute mechanism according to claim 1, characterized in that: The control unit includes: a pre-laminated reel, a film-pulling belt and a first driving module, one end of the film-pulling belt is connected to the film, and the other end is connected to the volute tongue assembly, one side of the film is wound around the pre-laminated reel, and the output shaft of the first driving module is connected to the pre-laminated reel.

5. The volute mechanism according to claim 4, characterized in that: The film-drawing belt is an elastic belt.

6. The volute mechanism according to claim 4, characterized in that: The control unit further includes a second driving module and a post-lamination reel controlled by the second driving module, and the other end of the film-drawing belt is wound on the post-lamination reel.

7. The volute mechanism according to claim 4, characterized in that: The film-drawing belt is wound on the wind-guiding surface of the volute tongue component and is close to the short side edge of the wind-guiding surface.

8. The volute mechanism according to claim 6, characterized in that: The first driving module and the second driving module are both driving motors, and the output shafts of the driving motors are respectively connected to the front film-covering reel and the rear film-covering reel, so as to drive the front film-covering reel and the rear film-covering reel to rotate and rewind or unwind.

9. The volute mechanism according to any one of claims 1 to 8, characterized in that: The control unit is provided with two groups, and the two groups of the control units are respectively connected to two opposite sides in the width direction of the film.

10. An air conditioner, characterized in that: The air conditioner comprises a bottom shell and a volute mechanism as claimed in any one of claims 1 to 9 arranged in the bottom shell.

11. A control method for a volute mechanism, the control method being executed by the air conditioner according to claim 10, characterized in that: The following steps are involved: Obtaining the fan speed of the air conditioner, and adjusting the shielding area of ​​the air guide surface of the volute tongue component blocked by the film according to the fan speed; When the speed of the fan is lower than the set threshold, the control unit controls the film to enter a fully retracted state, so that the wind guide surface is fully exposed; When the speed of the fan is higher than a set threshold, the control unit controls the film to enter a partially or fully blocked state, so that the wind guide surface of the volute tongue assembly is partially or fully blocked by the film.

12. The control method of the volute mechanism according to claim 11, characterized in that: In the step of controlling the film to enter a fully wound state or a partially or fully blocked state by the control unit, the rotation speeds of the first drive module and the second drive module for controlling the winding and unwinding of the film maintain a set difference, so that the film is in a tensioned state.

Images