Volute assembly, fan, indoor unit and air conditioning equipment

Abstract

The invention relates to a volute assembly, a fan, an indoor unit and air conditioning equipment. The volute assembly comprises a volute body, a movable volute and a cover plate, and an air inlet, a first air opening and a second air opening are formed in the volute body; the inner wall of the volute body is provided with a flow guide part arranged in a protruding mode, and the flow guide part extends to the first air opening. The movable volute is movably arranged in the volute body and used for achieving switching of the communicating states of the volute cavity and the first air opening and the communicating states of the volute cavity and the second air opening. The cover plate is arranged outside the volute main body and is opposite to the flow guide part, a fluid cavity is defined by the cover plate and the volute main body, a plurality of first through holes communicated with the fluid cavity are formed in the flow guide part, the fluid cavity is provided with a ventilation opening capable of being opened and closed, and the ventilation opening is communicated with the air inlet. According to the volute assembly, the multiple first through holes are formed, the air inlet area of the side, where the first air opening is located, of the indoor unit is increased equivalently, and the air return resistance of the indoor unit in the reversible air supply process is reduced advantageously.

Description

Technical Field

[0001] This application relates to the field of air handling technology, and more particularly to a volute assembly, a fan, an indoor unit, and an air conditioning device. Background Technology

[0002] In order to adjust the air outlet direction of the indoor unit, existing technologies include indoor units with multiple air outlets. Depending on the different working modes of the indoor unit, the air outlet and air intake functions of each air outlet can be switched, which means that reversible air supply can be achieved.

[0003] In order to change the air outlet direction of the indoor unit, the indoor unit is equipped with a volute assembly with multiple air outlets. The volute assembly includes a movable volute, which can switch the air outlets by moving the movable volute, thereby sending the airflow inside the volute cavity out through different air outlets.

[0004] However, during the reversible air supply process of the aforementioned indoor unit, the size of the volute assembly with the movable volute is increased due to the presence of a movable volute and a driving component within the volute assembly. When the volume of the indoor unit remains constant, the space occupied by the volute assembly with the movable volute is relatively large, resulting in a limited overall air intake area and causing the indoor unit to have a large return air resistance. Summary of the Invention

[0005] This application provides a volute assembly, a fan, an indoor unit, and an air conditioning device to solve the technical problem of high return air resistance in the reversible air supply process of the indoor unit in the prior art.

[0006] In a first aspect, this application provides a volute assembly, comprising: The volute body has an air inlet on its axial end face and a first air outlet and a second air outlet on its circumferential side. The inner wall of the volute body has a protruding guide portion that extends to the first air outlet. The movable volute is movably disposed inside the volute body. The movable volute and the volute body enclose the volute chamber to form the volute chamber cavity. The movable volute is used to switch the connection state between the volute chamber cavity and the first air outlet and the second air outlet. A cover plate is disposed on the outside of the volute body and opposite to the flow guide. The cover plate and the volute body enclose a fluid chamber. The flow guide has multiple first through holes that communicate with the fluid chamber. The fluid chamber has an openable and closable vent, and the vent communicates with the air inlet.

[0007] Optionally, the movable volute has a first air outlet position and a second air outlet position. When the movable volute is in the first air outlet position, the first air outlet is separated from the volute chamber by the movable volute, the second air outlet is connected to the volute chamber, the vent is in the open state, the airflow entering the first air outlet flows through the guide part, enters the fluid chamber through the first through hole, and then enters the air inlet through the vent. When the movable volute is in the second air outlet position, the second air outlet is separated from the volute chamber by the movable volute, the first air outlet is connected to the volute chamber, the vent is in a closed state, the airflow inside the volute chamber flows through the guide section, enters and exits the fluid chamber through the first through hole, and then flows out through the first air outlet.

[0008] Optionally, the volute body includes a first air duct, which is connected to the volute chamber and a first air outlet respectively; the guide section is integrated into the inner wall of the first air duct. When the movable volute is in the first air outlet position, the guide section and the volute chamber are separated by the movable volute. When the movable volute is in the second air outlet position, the guide section and the volute chamber are connected.

[0009] Optionally, the volute body includes a second air duct, which is connected to the volute chamber and the second air outlet respectively, and a plurality of second through holes are provided on the side wall of the air duct. When the movable volute is in the second air outlet position, the airflow entering the second air inlet flows through the second through hole to the air inlet, and then flows into the volute chamber through the air inlet.

[0010] Optionally, the flow guide includes an arc-shaped plate protruding toward the interior of the volute body, with a plurality of first through holes evenly distributed on the arc-shaped plate.

[0011] Optionally, the end of the volute body is also provided with a flow guide channel, which is connected to the fluid chamber, and the vent is located on the side of the flow guide channel facing the air inlet.

[0012] Optionally, the volute assembly also includes a movable sealing component, which is configured to correspond to the vent and is used to control the opening and closing of the vent.

[0013] Optionally, the sealing assembly includes a resilient seal, and the vent has a contact surface that matches the resilient seal.

[0014] Optionally, the sealing component is driven to the movable volute to achieve linkage between the sealing component and the movable volute.

[0015] Secondly, this application provides a fan, including the volute assembly provided in the first aspect of this application, and also includes a fan blade assembly, which is rotatably disposed inside the volute chamber.

[0016] Thirdly, this application provides an indoor unit, including the fan provided in the second aspect of this application, and also including a housing assembly and a baffle assembly. The fan is disposed inside the housing assembly, and the housing assembly has a third air outlet and a fourth air outlet. The third air outlet is configured to correspond to the first air outlet, and the fourth air outlet is configured to correspond to the second air outlet. The air inlet is connected to the third air outlet and the fourth air outlet respectively; the baffle assembly is movably installed inside the housing assembly to realize the switching of the connection state between the air inlet and the third air outlet and the fourth air outlet.

[0017] Optionally, the baffle assembly has a first return air position and a second return air position; when the baffle assembly is in the first return air position, the air inlet is connected to the third air outlet, and the fourth air outlet is separated from the air inlet by the baffle assembly; when the movable volute is in the first air outlet position, the first air outlet is separated from the volute chamber by the movable volute, the second air outlet is connected to the volute chamber, and the vent is in the open state. When the baffle assembly is in the second return air position, the air inlet is connected to the fourth air outlet, and the third air outlet is separated from the air inlet by the baffle assembly; when the movable volute is in the second air outlet position, the second air outlet is separated from the volute chamber by the movable volute, the first air outlet is connected to the volute chamber, and the ventilation opening is in the closed state.

[0018] Optionally, the baffle assembly is integrated with a sealing component for controlling the opening and closing of the vent.

[0019] Optionally, there are multiple fans arranged side by side inside the housing assembly. Both ends of the volute body are provided with air inlets, and the ends of two adjacent fans are connected by a baffle assembly.

[0020] Alternatively, the cover plate is integrated into the housing assembly.

[0021] Fourthly, this application provides an air conditioning device, including the indoor unit provided in the third aspect of this application.

[0022] The technical solutions provided in this application have the following advantages compared with the prior art: The volute assembly provided in this embodiment includes a volute body, a movable volute, and a cover plate. An air inlet is provided on the axial end face of the volute body to allow axial air intake. A first air outlet and a second air outlet are provided on the circumferential side of the volute body, allowing airflow inside the volute body to flow out from either the first or second air outlet depending on the indoor unit's operating mode. The inner wall of the volute body has a protruding guide portion extending to the first air outlet, which guides the airflow entering or exiting the volute body from the first air outlet. The movable volute is movably disposed inside the volute body, forming a volute chamber with the volute body. The movable volute is used to switch the connection between the volute chamber and the first and second air outlets. The cover plate and the volute body enclose a fluid chamber. The guide section has multiple first through holes that communicate with the fluid chamber. As the airflow flows along the guide section, it can pass through the first through holes and enter the fluid chamber. The fluid chamber has an openable vent that is connected to the air inlet. When the vent is open, the airflow inside the fluid chamber can enter the air inlet through the vent. The opening of multiple first through holes is equivalent to increasing the air intake area of ​​the indoor unit on the side where the first air outlet is located, which helps to reduce the return air resistance of the indoor unit during the reversible air supply process.

[0023] The fan, indoor unit, and air conditioning equipment provided in this application embodiment include the above-mentioned volute assembly, which can reduce return air resistance. Therefore, it naturally possesses the technical effects of the above-mentioned volute assembly. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0027] Figure 1 A schematic diagram of the structure of the fan provided in the embodiments of this application. Figure 1 ; Figure 2 A schematic diagram of the structure of the fan provided in the embodiments of this application. Figure 2 ; Figure 3 A schematic diagram of the structure of the volute body provided in the embodiments of this application. Figure 1 ; Figure 4 A schematic diagram of the structure of the volute body provided in the embodiments of this application. Figure 2 ; Figure 5 A partial structural schematic diagram of the volute assembly provided in an embodiment of this application; Figure 6 A schematic diagram showing the state of the volute assembly provided in this application embodiment when the movable volute is in the first air outlet position; Figure 7 A schematic diagram showing the state of the volute assembly provided in this application embodiment when the movable volute is in the second air outlet position; Figure 8 This is a schematic diagram of the first operating state of the fan provided in an embodiment of this application; Figure 9 Schematic diagram of the second operating state of the fan provided in the embodiments of this application Figure 1 ; Figure 10 Schematic diagram of the second operating state of the fan provided in the embodiments of this application Figure 2 ; Figure 11 A schematic diagram of the structure of the indoor unit provided in the embodiments of this application. Figure 1 ; Figure 12 Provided for the embodiments of this application Figure 11 Enlarged detail of section A; Figure 13 A partial cross-sectional view of the indoor unit provided in an embodiment of this application; Figure 14 Provided for the embodiments of this application Figure 13 Enlarged detail view of section B; Figure 15 Provided for the embodiments of this application Figure 11 A schematic diagram of the internal structure of the indoor unit; Figure 16 This is a schematic diagram of the first operating mode of the indoor unit provided in an embodiment of this application; Figure 17 A schematic diagram of the structure of the indoor unit provided in the embodiments of this application. Figure 2 ; Figure 18 Provided for the embodiments of this application Figure 17 A schematic diagram of the internal structure of the indoor unit; Figure 19 This is a schematic diagram of the second operating mode of the indoor unit provided in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures: 1. Volute body; 1a. First volute body; 1b. Second volute body; 1c. Third volute body; 11. Air inlet; 12. First air outlet; 13. Second air outlet; 14. Air guide; 141. First through hole; 142. Arc-shaped plate; 143. Reinforcing rib; 15. Volute chamber; 16. Fluid chamber; 17. First air duct; 18. Second air duct; 181. Second through hole; 19. Air guide channel; 191. Ventilation opening; 192. Contact surface; 2. Movable volute; 2a. First movable volute; 2b. Second movable volute; 2c. Third movable volute; 3. Cover plate; 4. Sealing assembly; 41. Elastic seal; 5. Fan blade assembly; 6. Housing assembly; 61. Third air vent; 62. Fourth air vent; 63. Base plate; 64. Side plate; 65. Top plate; 66. Rear plate; 67. Front plate; 7. Baffle assembly; 7a. First baffle assembly; 7b. Second baffle assembly; 7c. Third baffle assembly; 7d. Fourth baffle assembly; 71. Baffle body; 72. Rotating frame; 8. Heat exchanger. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0031] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0032] To address the technical problem of high return air resistance in reversible air supply processes of indoor units in existing technologies, this application provides a volute assembly, a fan, an indoor unit, and an air conditioning device. The volute assembly has a protruding guide section 14 on the inner wall of the volute body 1, which extends to the first air outlet 12. A fluid chamber 16 exists between the guide section 14 and the cover plate 3 on the outside of the volute body 1. A first through hole 141 is provided on the guide section 14, allowing the return airflow to be blocked by the movable volute 2 and then enter the fluid chamber 16 through the first through hole 141. The airflow then enters the air inlet 11 of the volute assembly through the vent 191 of the fluid chamber 16. This increases the air intake area of ​​the volute assembly, increases the air intake volume at the air inlet 11, reduces the return air resistance of the volute assembly, and reduces the resistance of the indoor unit to return air on the side where the first air outlet 12 is located.

[0033] Please see Figures 1 to 19 The first aspect of this application provides a volute assembly applied to an indoor unit with multiple air vents. The positions of the air vents in the indoor unit are set according to the air outlet requirements. For example, when the indoor unit needs to achieve both upward and downward air outlets, the air vents can be located at the top and bottom of the indoor unit; when the indoor unit needs to achieve both horizontal and downward air outlets, the air vents can be located at the bottom and on one side. The following embodiments of this application will be described with the indoor unit having both horizontal and downward air outlet operating modes.

[0034] Specifically, the indoor unit is equipped with a third air vent 61 for downward airflow and a fourth air vent 62 for horizontal airflow. When one of the third air vent 61 and the fourth air vent 62 is used for airflow discharge, the other is used for air return, thereby realizing different operating modes of the indoor unit, such as... Figure 16 and Figure 19 As shown (the arrows in the figure indicate the direction of airflow).

[0035] To achieve different operating modes of the indoor unit, the volute assembly includes a volute body 1, a movable volute 2, and a cover plate 3. An air inlet 11 is provided on the axial end face of the volute body 1, allowing axial air intake. A first air vent 12 and a second air vent 13 are provided on the circumferential side of the volute body 1, allowing airflow inside the volute body 1 to exit from either the first air vent 12 or the second air vent 13 depending on the operating mode of the indoor unit. Figure 8 , Figure 9 and Figure 10 As shown (the arrows in the diagram indicate the direction of airflow), this allows the indoor unit to output air from the third air outlet 61 or the fourth air outlet 62.

[0036] The inner wall of the volute body 1 has a protruding guide portion 14 that extends to the first air inlet 12 and can guide the airflow entering or exiting the volute body 1 from the first air inlet 12.

[0037] The movable volute 2 is movably disposed inside the volute body 1. The movable volute 2 and the volute body 1 enclose a volute chamber 15. The movable volute 2 is used to switch the communication state between the volute chamber 15 and the first air outlet 12 and the second air outlet 13, such as... Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the opening directions of the first air vent 12 and the second air vent 13 are set at an angle to facilitate the shielding and avoidance of different air vents by moving the position of the movable volute 2. When the volute chamber 15 is connected to the first air vent 12, the airflow inside the volute chamber 15 can flow out from the first air vent 12, and then out from the air vent on the side of the indoor unit corresponding to the first air vent 12; when the volute chamber 15 is connected to the second air vent 13, the airflow inside the volute chamber 15 can flow out from the second air vent 13, and then out from the air vent on the other side of the indoor unit corresponding to the second air vent 13, thereby realizing the adjustment of the air outlet direction of the indoor unit, such as... Figure 16 and Figure 19 As shown.

[0038] The cover plate 3 is disposed on the outside of the volute body 1 and opposite to the flow guide 14, and the cover plate 3 and the volute body 1 enclose a fluid chamber 16, that is, a hollow cavity is formed between the flow guide 14 and the cover plate 3, such as Figure 5 , Figure 6 and Figure 7As shown, the airflow guide 14 has multiple first through holes 141 that communicate with the fluid chamber 16. As the airflow flows along the airflow guide 14, it can pass through the first through holes 141 on the airflow guide 14 and enter the fluid chamber 16. The fluid chamber 16 has an openable vent 191, and the vent 191 is connected to the air inlet 11. When the vent 191 is open, the airflow inside the fluid chamber 16 can enter the air inlet 11 through the vent 191. The opening of multiple first through holes 141 is equivalent to increasing the air intake area of ​​the indoor unit on the side where the first air outlet 12 is located, which helps to reduce the return air resistance of the indoor unit in the reversible air supply process.

[0039] It should be noted that when the indoor unit returns air through the vent on the side where the first vent 12 is located (such as the third vent 61), the volute assembly correspondingly discharges air through the second vent 13, causing the airflow in the indoor unit to be blown out through the vent on the side where the second vent 13 is located (such as the fourth vent 62). Figure 6 , Figure 8 and Figure 19 As shown. At this time, the movable volute 2 separates the first air inlet 12 from the volute chamber 15. The return airflow entering from the third air inlet 61 is blocked by the movable volute 2 and enters the fluid chamber 16 through the first through hole 141 of the guide section 14. Then it flows to the air inlet 11 of the volute assembly through the ventilation port 191 of the fluid chamber 16. This reduces the return air resistance and increases the air intake of the volute assembly and the fan. Under the same specifications, the air intake of the volute assembly of this application is larger than that of the conventional volute, and the power consumption of the fan is reduced.

[0040] In some embodiments of this application, the movable volute 2 has a first air outlet position and a second air outlet position. When the movable volute 2 is in the first air outlet position, the first air outlet 12 and the volute chamber 15 are separated by the movable volute 2, and the second air outlet 13 is connected to the volute chamber 15, such as... Figure 6 As shown, the vent 191 is in the open state. The airflow entering the first vent 12 flows through the guide section 14, enters the fluid chamber 16 through the first through hole 141, and then enters the air inlet 11 through the vent 191. When the indoor unit returns air through the third vent 61 on the side where the first vent 12 is located, some airflow will enter the volute body 1 through the first vent 12 and be blocked by the movable volute 2. Traditional volute assemblies can only allow airflow through the gap at one end of the volute body 1; however, in this application, because the guide section 14 extending to the first vent 12 is provided with the first through hole 141, the airflow remaining between the movable volute 2 and the first vent 12 can enter the fluid chamber 16 through the first through hole 141, and then flow into the air inlet 11 through the vent 191, as shown. Figure 8 As shown.

[0041] When the movable volute 2 is in the second air outlet position, the second air outlet 13 and the volute chamber 15 are separated by the movable volute 2, while the first air outlet 12 is connected to the volute chamber 15. Figure 7 As shown, the vent 191 is in the closed state. At this time, the indoor unit returns air through the fourth vent 62 on the side where the second vent 13 is located. The airflow enters the volute chamber 15 through the air inlet 11. The airflow inside the volute chamber 15 flows through the guide section 14. Since the vent 191 is in the closed state, the airflow can only enter and exit the fluid chamber 16 through the first through hole 141, and then flow out through the first vent 12. Figure 9 As shown; at this time, the fluid chamber 16 is equivalent to a soundproof chamber, which can resonate with noise waves of a specific frequency to achieve sound silencing, effectively suppressing airflow noise and significantly reducing the noise level when air is discharged through the first air outlet 12.

[0042] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 The volute body 1 includes a first air duct 17, which is connected to the volute chamber 15 and the first air outlet 12 respectively. The guide section 14 is integrated on the inner wall of the first air duct 17, so that the airflow can pass through the guide section 14 and the fluid chamber 16 when the airflow flows from the volute chamber 15 to the first air outlet 12 or from the first air outlet 12 to the volute chamber 15, thereby reducing the return air resistance or reducing the noise of the outlet airflow.

[0043] When the movable volute 2 is in the first air outlet position, the guide section 14 and the volute chamber 15 are separated by the movable volute 2, such as... Figure 6 As shown, at this time, the return airflow entering through the third air vent 61 of the indoor unit flows into the first air vent 12, is blocked by the movable volute 2, and can enter the fluid chamber 16 through the first through hole 141 of the guide section 14, and then enter the air inlet 11 through the vent 191 of the fluid chamber; when the movable volute 2 is in the second air outlet position, the guide section 14 is connected to the volute chamber 15, as shown. Figure 7 As shown, when the airflow inside the volute chamber 15 flows out through the first air duct 17, it can enter the fluid chamber 16 through the first through hole 141 on the guide section 14. After the noise is reduced by the fluid chamber 16, it flows out of the fluid chamber 16 through the first through hole 141, which can reduce the noise level of the first air outlet 12.

[0044] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 6 , Figure 9 and Figure 10The volute body 1 includes a second air duct 18, which is connected to the volute chamber 15 and the second air inlet 13. Multiple second through holes 181 are provided on the side wall of the second air duct 18. When the movable volute 2 is in the second air outlet position, the airflow entering the second air inlet 13 is blocked by the movable volute 2, but can flow through the second through holes 181 to the air inlet 11, and then into the volute chamber 15 through the air inlet 11. Figure 9 and Figure 10 As shown, when the indoor unit returns air through the fourth air outlet 62 on the side where the second air outlet 13 is located, the return airflow entering between the second air outlet 13 and the movable volute 2 can flow out of the second air duct 18 through the second through hole 181, avoiding the formation of a high-pressure area in the middle area inside the volute body 1 (such as the area between the movable volute 2 and the second air outlet 13), and maintaining air pressure balance between the middle area of ​​the volute body 1 and the external areas at both ends, thus reducing the return air resistance when the return airflow enters the fan through the side where the second air outlet 13 is located.

[0045] It should be noted that by providing a first through hole 141 at the first air outlet 12 and a second through hole 181 at the second air outlet 13, this application enables the indoor unit to achieve reduced return air resistance and increased air intake volume regardless of whether the return air is from the side where the first air outlet 12 is located or the side where the second air outlet 13 is located. This is beneficial for improving the operating performance of the indoor unit in different working modes. By adopting the volute assembly of this application, due to the increased air intake volume, a smaller fan can be installed inside the indoor unit model with the same air volume.

[0046] In some embodiments of this application, please refer to Figure 8 and Figure 9 The cross-sectional area of ​​the first through-hole 141 is smaller than that of the second through-hole 181. In addition to increasing the air intake area, the first through-hole 141 also has a noise reduction function. Therefore, a better noise reduction effect can be achieved with a smaller cross-sectional area. When the airflow of the second air duct 18 passes through the second through-hole 181, the larger cross-sectional area can quickly achieve airflow and pressure balance.

[0047] It should be noted that the shapes of the first through hole 141 and the second through hole 181 can be circular holes, elliptical holes, polygonal holes, etc. The first through hole 141 and the second through hole 181 are preferably microporous structures. Specifically, the cross-sectional areas of the first through hole 141 and the second through hole 181 can be designed through fluid simulation. Preferably, the cross-sectional area of ​​the second through hole 181 is more than twice that of the cross-sectional area of ​​the first through hole 141. This can create a better airflow effect on the side wall of the second air duct 18 with a limited layout area, and quickly transport the high-pressure airflow accumulated in the middle of the volute to the air inlet 11 at the end of the volute body 1.

[0048] In some embodiments of this application, please refer to Figure 3and Figure 4 The airflow guide 14 includes an arc-shaped plate 142 protruding towards the interior of the volute body 1. The arc-shaped plate 142 is integrally formed with the volute body 1, which simplifies the assembly process. Multiple first through holes 141 are evenly distributed on the arc-shaped plate 142. When the airflow flows in the first air duct 17, it can be blocked by the protruding arc-shaped plate 142, thereby allowing more airflow to enter the fluid chamber 16 through the evenly distributed first through holes 141, thus increasing the intake air volume or reducing the noise of the exhaust airflow.

[0049] In some embodiments of this application, please refer to Figure 4 The flow guide 14 also includes a reinforcing rib 143 disposed on one side of the arc-shaped plate 142. The reinforcing rib 143 is located on the side of the arc-shaped plate 142 facing away from the first air duct 17, which can strengthen the structural strength of the flow guide 14, prevent the flow guide 14 from deforming when impacted by airflow, and help improve the structural stability of the flow guide 14.

[0050] In some embodiments of this application, please refer to Figure 1 and Figure 8 The end of the volute body 1 is also provided with a flow channel 19, which is connected to the fluid chamber 16. The vent 191 is located on the side of the flow channel 19 facing the air inlet 11. When the vent 191 is open, the airflow in the fluid chamber 16 flows to the flow channel 19 at the end of the volute body 1 and finally flows to the air inlet 11 at the end of the volute body 1 through the vent 191.

[0051] It should be noted that this application provides a clear and relatively smooth guiding path for the airflow in the fluid chamber 16 by providing a flow guide channel 19 communicating with the fluid chamber 16 at the end of the volute body 1. The airflow flows from the fluid chamber 16 to the flow guide channel 19, and then through the vent 191 to the air inlet 11, avoiding disordered flow and collision of airflow in complex structures, reducing energy loss caused by turbulence, eddies, etc., and enabling the airflow to complete the delivery process more efficiently. When the vent 191 is open, the airflow is constrained and guided by the channel wall within the flow guide channel 19, and can flow to the air inlet 11 at a faster speed. Compared with the case without the flow guide channel 19, the airflow delivery speed is improved, thereby accelerating the working rhythm of the entire system and improving the air intake efficiency.

[0052] In some embodiments of this application, please refer to Figure 1 and Figure 8 The cross-section of the flow channel 19 along the direction from the fluid chamber 16 to the vent 191 is tapered. The cavity enclosed by the inner wall of the flow channel 19 has a gradually converging cross-sectional shape and its inner wall surface is smooth, ensuring that the airflow remains stable before entering the air inlet 11 and reducing the generation of eddies and turbulence.

[0053] In some embodiments of this application, please refer to Figure 1 , Figure 8 , Figure 9 and Figure 10 The volute assembly also includes a movable blocking component 4, which is correspondingly arranged with the vent 191 to realize the opening and closing control of the vent 191. Specifically, by moving the blocking component 4 relative to the vent 191, the vent 191 is blocked or avoided, thereby realizing the opening and closing of the vent 191, and thus enabling the fluid chamber 16 to realize different airflow transmission processes in different working modes of the indoor unit.

[0054] It should be noted that the movable blocking component 4 can precisely control the opening and closing of the vent 191 according to different operating modes of the indoor unit. When airflow needs to enter the air inlet 11 through the vent 191 of the fluid chamber 16, the blocking component 4 moves to avoid the vent 191, allowing the airflow to pass smoothly; when the volute assembly exits air through the first air outlet 12, the blocking component 4 blocks the vent 191, blocking the airflow, so that the airflow can only flow out of the fluid chamber 16 again through the first through hole 141, achieving noise reduction. This precise control method allows the airflow to flow orderly in the fluid chamber 16 and related channels according to design requirements, meeting the needs under different operating conditions.

[0055] In some embodiments of this application, please refer to Figure 13 and Figure 14 The sealing component 4 includes an elastic seal 41. The vent 191 is provided with a contact surface 192 that matches the elastic seal 41. When the sealing component 4 abuts against the vent 191, the elastic seal 41 can achieve buffering and sealing, preventing rigid impact between the sealing component 4 and the vent 191, and improving the sealing performance when the vent 191 is blocked.

[0056] In some embodiments of this application, a sealing gasket is also provided on the contact surface 192. The sealing gasket has an opening corresponding to the vent 191, which can further reduce the collision stress when the sealing component 4 and the vent 191 are engaged, and improve the sealing performance between the sealing component 4 and the vent 191.

[0057] It should be noted that the sealing component 4 can be disposed inside the fluid chamber 16 to block the vent 191 from the inside, or it can be disposed outside the fluid chamber 16 to block the vent 191 from the outside. However, considering the limited internal volume of the fluid chamber 16 and the fact that the sealing component 4 could easily affect the airflow within the fluid chamber 16, it is preferable to dispose of the sealing component 4 outside the fluid chamber 16. Figure 1 , Figure 8 and Figure 9As shown.

[0058] In the above embodiments, the opening and closing of the vent 191 is closely related to the position of the movable volute 2. When the movable volute 2 is in the first air outlet position, the vent 191 is in the open state, and when the movable volute 2 is in the second air outlet position, the vent 191 is in the closed state. Therefore, the blocking component 4 and the movable volute 2 can be driven independently or driven in conjunction with the same set of driving components.

[0059] In some embodiments of this application, please refer to Figure 2 and Figure 10 The blocking component 4 is connected to the movable volute 2 to achieve linkage between the blocking component 4 and the movable volute 2. When the indoor unit's working mode is switched, the movable volute 2 and the blocking component 4 move synchronously, thereby achieving the switching of the connection state of the first air outlet 12, the second air outlet 13 and the ventilation outlet 191, which can improve the linkage and reliability of the air outlet state switching of the volute component.

[0060] In some embodiments of this application, please refer to Figure 2 and Figure 10 The movable volute 2 is rotatably disposed inside the volute body 1, and the sealing component 4 is rotatably disposed outside the volute body 1. The movable volute 2 and the sealing component 4 are connected by a transmission, so that when both the movable volute 2 and the sealing component 4 rotate relative to the volute body 1, the relative position between the movable volute 2 and the sealing component 4 remains unchanged, thereby realizing the linkage between the sealing component 4 and the movable volute 2.

[0061] Specifically, when the movable volute 2 rotates to the side where the first air vent 12 is located on the volute body 1, the sealing assembly 4 simultaneously rotates to a position away from the air vent 191, such as... Figure 2 As shown, the return airflow blocked by the movable volute 2 at the first air inlet 12 can flow through the fluid chamber 16 and the vent 191 to the air inlet 11. When the movable volute 2 rotates to the side where the second air inlet 13 is located on the volute body 1, the sealing assembly 4 rotates synchronously to a position opposite to the vent 191, forming a seal and shield for the vent 191, as shown. Figure 10 As shown, the airflow from the volute chamber 15 to the first air outlet 12 can be silenced and reduced through the fluid chamber 16.

[0062] Please see Figures 1 to 19 The second aspect of this application provides a fan, including the volute assembly described in the above embodiments, and also includes a fan blade assembly 5. The fan blade assembly 5 is rotatably disposed inside the volute chamber 15 to provide power for airflow, so that airflow can be drawn into the volute chamber 15 from the air inlet 11 and then flow out from the first air outlet 12 or the second air outlet 13.

[0063] In some embodiments of this application, the fan is a centrifugal fan equipped with a volute assembly, which can effectively collect, pressurize, and guide gas flow. It can accurately and comprehensively collect gas entering the centrifugal fan from all directions, achieving axial air intake and circumferential air outlet, such as... Figure 8 and Figure 9 As shown. This fan can be installed in household appliances, air conditioning equipment, and other devices, effectively reducing vibration, noise, and energy consumption during operation.

[0064] Please see Figures 1 to 19 The third aspect of this application provides an indoor unit, including the fan described in the above embodiments, and further including a housing assembly 6 and a baffle assembly 7. The fan is disposed inside the housing assembly 6. The housing assembly 6 has a third air vent 61 and a fourth air vent 62, so that airflow can only enter and exit the housing assembly 6 through the third air vent 61 and the fourth air vent 62. The third air vent 61 is correspondingly disposed to the first air vent 12, and the airflow flowing out of the first air vent 12 can be blown out of the indoor unit through the third air vent 61. The fourth air vent 62 is correspondingly disposed to the second air vent 13, and the airflow flowing out of the second air vent 13 can be blown out of the indoor unit through the fourth air vent 62, thereby giving the indoor unit multiple air outlet directions and realizing different working modes of the indoor unit.

[0065] The air inlet 11 is connected to the third air outlet 61 and the fourth air outlet 62 respectively, so that the indoor unit can return air through either the third air outlet 61 or the fourth air outlet 62; the baffle assembly 7 is movably disposed inside the housing assembly 6, and the baffle assembly 7 is used to switch the connection state between the air inlet 11 and the third air outlet 61 and the fourth air outlet 62, thereby realizing the switching of the indoor unit's working mode.

[0066] Specifically, the indoor unit has a first operating mode and a second operating mode, which can be referred to as a down-discharge operating mode and a horizontal-discharge operating mode. A third air vent 61 is located on the bottom plate 63 of the housing assembly 6, and a fourth air vent 62 is located on the front plate 67 of the housing assembly 6. When the indoor unit is in the first operating mode, such as... Figure 16 As shown, the indoor unit returns air through the fourth air vent 62. At this time, the baffle assembly 7 moves to connect the fourth air vent 62 with the air inlet 11, and the indoor unit discharges air through the third air vent 61, realizing the downward air discharge function of the indoor unit (i.e., the downward air discharge working mode), which is suitable for achieving downward blowing of hot air during heating. When the indoor unit is in the second working mode, as... Figure 19 As shown, the indoor unit returns air through the third air vent 61. At this time, the baffle assembly 7 moves to connect the third air vent 61 with the air inlet 11, and the indoor unit discharges air through the fourth air vent 62, which can realize the horizontal air discharge function of the indoor unit (i.e., the horizontal air discharge working mode), which is suitable for realizing the horizontal blowing of cold air during cooling.

[0067] In some embodiments of this application, please refer to Figure 11, Figure 15 , Figure 17 and Figure 18 The baffle assembly 7 has a first return air position and a second return air position; when the baffle assembly 7 is in the first return air position, the air inlet 11 is connected to the third air outlet 61, and the fourth air outlet 62 is separated from the air inlet 11 by the baffle assembly 7, such as... Figure 17 and Figure 18 As shown, the return airflow can be drawn into the air inlet 11 at the end of the volute body 1 from the third air inlet 61 under the rotation of the fan blade assembly 5. The movable volute 2 is in the first air outlet position, the first air inlet 12 is separated from the volute chamber 15 by the movable volute 2, the second air inlet 13 is connected to the volute chamber 15, and the vent 191 is in the open state. A portion of the return airflow located in the first air duct 17 can enter the fluid chamber 16 through the first through hole 141, and then flow to the air inlet 11 through the vent 191. Compared with the traditional volute assembly with the movable volute 2, this is equivalent to adding an air inlet channel, reducing the return air resistance of the indoor unit on the third air inlet 61 side. The airflow entering the volute chamber 15 from the air inlet 11 finally flows out of the volute body 1 through the second air inlet 13, and then flows to the fourth air inlet 62 to achieve horizontal air outlet of the indoor unit.

[0068] When the baffle assembly 7 is in the second return air position, the air inlet 11 is connected to the fourth air outlet 62, and the third air outlet 61 is separated from the air inlet 11 by the baffle assembly 7. Figure 11 and Figure 15 As shown, the return airflow can be drawn into the air inlet 11 at the end of the volute body 1 from the fourth air outlet 62 under the rotation of the fan blade assembly 5. The movable volute 2 is in the second air outlet position. The second air outlet 13 and the volute chamber 15 are separated by the movable volute 2. The first air outlet 12 is connected to the volute chamber 15. The vent 191 is in the closed state. A portion of the return airflow in the second air duct 18 can flow to the end of the volute body 1 through the second through hole 181, and then flow into the volute chamber 15 through the air inlet 11. This can also reduce the return air resistance and increase the air intake. The airflow entering the volute chamber 15 from the air inlet 11 finally flows out through the first air duct 17. When it flows through the guide section 14, it enters the fluid chamber 16 through the first through hole 141 to achieve noise reduction. Then it flows out of the fluid chamber 16 through the first through hole 141, and then flows from the first air outlet 12 to the third air outlet 61 to achieve the downward air outlet of the indoor unit.

[0069] In some embodiments of this application, please refer to Figure 13 and Figure 14The baffle assembly 7 is integrated with a blocking component 4 for controlling the opening and closing of the vent 191. This allows the baffle assembly 7 and the blocking component 4 to be driven by the same drive mechanism. The blocking component 4 is integrated on the baffle assembly 7, which allows the baffle assembly 7 and the blocking component 4 to move synchronously. For example, when the baffle assembly 7 isolates the third air vent 61 from the air inlet 11, the blocking component 4 can simultaneously block the vent 191. This enables the linkage between the opening and closing state of the vent 191 and the moving state of the baffle assembly 7. It also helps to reduce the number of drive mechanisms inside the indoor unit and lower equipment costs.

[0070] Specifically, the baffle assembly 7 includes a baffle body 71 and a rotating frame 72. The elastic seal 41 is disposed on the baffle body 71, and the rotating frame 72 is rotatably connected to the volute body 1. When the baffle assembly 7 rotates relative to the volute body 1, it can drive the elastic seal 41 to move synchronously, thereby realizing the opening and closing control of the vent 191 while the indoor unit's working mode is switched.

[0071] In some embodiments of this application, please refer to Figure 11 , Figure 15 , Figure 17 and Figure 18 The unit has multiple fans arranged side-by-side inside the housing assembly 6, which increases the air delivery capacity of the indoor unit, enabling faster indoor air circulation and temperature regulation. Specifically, the number of fans can be adjusted based on the size of the indoor space; no limit is specified here.

[0072] Both ends of the volute body 1 are provided with air inlets 11, which allow airflow to enter from both ends of the volute body 1, significantly increasing the air intake area of ​​the volute body 1. Moreover, the airflow can enter the volute body 1 simultaneously from two opposite directions (i.e., the two axial ends of the volute body 1), reducing equipment vibration and noise problems caused by uneven airflow distribution. The ends of two adjacent fans are connected by baffle assemblies 7. The connection between the air inlets 11 of the two volute bodies 1 and the third air outlet 61 and the fourth air outlet 62 can be controlled by the same baffle assembly 7 (such as the second baffle assembly 7b and the third baffle assembly 7c), which helps to reduce the number of baffle assemblies 7 and drive assemblies.

[0073] As a specific embodiment of this application, please refer to Figure 11 , Figure 15 , Figure 17 and Figure 18The indoor unit's housing assembly 6 contains three fans: the first fan has a first volute body 1a, the second fan has a second volute body 1b, and the third fan has a third volute body 1c. The housing assembly 6 also contains four baffle assemblies 7, designated as first baffle assembly 7a, second baffle assembly 7b, third baffle assembly 7c, and fourth baffle assembly 7d. First baffle assembly 7a is movably disposed on the side of first volute body 1a facing away from second volute body 1b; fourth baffle assembly 7d is movably disposed on the side of third volute body 1c facing away from second volute body 1b; second baffle assembly 7b is movably disposed between first volute body 1a and second volute body 1b; and third baffle assembly 7c is movably disposed between second volute body 1b and third volute body 1c. Through the synchronous movement of multiple baffle assemblies 7, the connection status between multiple air inlets 11 and the third air outlet 61 and the fourth air outlet 62 can be switched.

[0074] When the indoor unit switches between operating modes, the movable volutes 2 inside the multiple volute bodies 1 (i.e., the first movable volute 2a, the second movable volute 2b, and the third movable volute 2c) can move synchronously, thereby realizing the air output control of multiple fans.

[0075] In some embodiments of this application, please refer to Figure 11 , Figure 13 , Figure 16 , Figure 17 and Figure 19 The housing assembly 6 includes a front panel 67, a rear panel 66, a top panel 65, a bottom panel 63, and two side panels 64. The front panel 67, rear panel 66, top panel 65, bottom panel 63, and two side panels 64 enclose a cuboid cavity with a third air vent 61 and a fourth air vent 62. Multiple fans are installed inside the cuboid cavity, which restricts the airflow to the indoor unit through the inner wall of the cuboid cavity, allowing air to enter and exit only through the third air vent 61 and the fourth air vent 62, thereby improving the air intake and exhaust effect of the indoor unit.

[0076] In some embodiments of this application, please refer to Figure 5 , Figure 12 and Figure 19 The cover plate 3 is integrated on the housing assembly 6, that is, at least part of the housing assembly 6 is configured as the cover plate 3. When the volute body 1 is installed inside the housing assembly 6, a fluid chamber 16 can be formed between the volute body 1 and the housing assembly 6, which helps to reduce the number of parts and reduce the weight of the indoor unit.

[0077] Specifically, at least part of the rear panel 66 is configured as the cover plate 3 of the volute assembly, and the fluid chamber 16 is formed between the flow guide 14 and the rear panel 66, which can reduce the amount of sheet metal used in the indoor unit.

[0078] In some embodiments of this application, please refer to Figure 16 and Figure 19 The indoor unit also includes a heat exchanger 8 disposed inside the housing assembly 6, which is used to exchange heat with the airflow entering the housing assembly 6, thereby achieving temperature regulation of the outlet airflow.

[0079] Please see Figures 1 to 19 The fourth aspect of this application provides an air conditioning device, including the indoor unit described in the above embodiments, which can significantly reduce the energy consumption and noise generated during the operation of the air conditioning device, and is conducive to improving the product competitiveness of the air conditioning device.

[0080] It should be noted that air conditioning equipment can be central air conditioning equipment (such as ducted air conditioners), split air conditioning equipment (such as split wall-mounted air conditioners), and integrated air conditioning equipment (such as window air conditioners), which can regulate indoor environmental parameters such as temperature and humidity, and improve user comfort.

[0081] Please see Figures 1 to 19 In some embodiments of this application, the operation of the indoor unit described above is as follows: Step 1: The user selects the indoor unit's operating mode based on the ambient temperature. When the user selects the indoor unit to operate in the down-discharge mode, proceed to Step 2. When the user selects the indoor unit to operate in the horizontal-discharge mode, proceed to Step 5. Step 2: The baffle assembly 7 is moved to the side where the third air vent 61 is located. At this time, the baffle assembly 7 is in the second return air position, such as... Figure 15 As shown, the fourth air outlet 62 is connected to the air inlet 11 of the volute assembly; at this time, the movable volute 2 inside the volute body 1 is in the second air outlet position, and the vent 191 is in the closed state. Step 3: After the fan blade assembly 5 rotates, the return airflow from outside the indoor unit is drawn in through the fourth air vent 62, such as... Figure 16 As shown, at this time, part of the airflow flows to the second air inlet 13 and is blocked by the movable volute 2. This part of the return airflow flows to the air inlet 11 through the second through hole 181, as shown. Figure 9 and Figure 10 As shown; Step 4: The airflow entering the volute chamber 15 flows to the first air duct 17, and when it flows through the guide section 14, it enters and exits the fluid chamber 16 through the first through hole 141, thereby reducing the noise of the airflow at the first air outlet 12. Then it flows out from the third air outlet 61, thereby realizing the downward air outlet function of the indoor unit.

[0082] Step 5: The baffle assembly 7 is moved to the side where the fourth air vent 62 is located. At this time, the baffle assembly 7 is in the first return air position, such as... Figure 18 As shown, the third air vent 61 is connected to the air inlet 11 of the volute assembly; at this time, the movable volute 2 inside the volute body 1 is in the first air outlet position, and the vent 191 is in the open state. Step Six: After the fan blade assembly 5 rotates, the return airflow from outside the indoor unit is drawn in through the third air vent 61, such as... Figure 19 As shown, at this time, part of the airflow flows to the first air inlet 12 and is blocked by the movable volute 2. This part of the return airflow enters the fluid chamber 16 through the first through hole 141 of the guide section 14, and then flows to the air inlet 11 through the guide channel 19 and the vent 191, as shown. Figure 8 As shown; Step 7: The airflow entering the volute chamber 15 flows to the second air duct 18, flows out through the second air outlet 13, and then flows out through the fourth air outlet 62, realizing the horizontal air outlet function of the indoor unit.

[0083] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0084] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0085] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A volute assembly, characterized in that, include: The volute body (1) has an air inlet (11) on its axial end face and a first air inlet (12) and a second air inlet (13) on its circumferential side. The inner wall of the volute body (1) has a protruding guide portion (14) that extends to the first air inlet (12). The movable volute (2) is movably disposed inside the volute body (1). The movable volute (2) and the volute body (1) enclose a volute chamber (15). The movable volute (2) is used to realize the switching of the communication state between the volute chamber (15) and the first air outlet (12) and the second air outlet (13). A cover plate (3) is disposed outside the volute body (1) and opposite to the flow guide (14). The cover plate (3) and the volute body (1) enclose a fluid chamber (16). The flow guide (14) has a plurality of first through holes (141) communicating with the fluid chamber (16). The fluid chamber (16) has an openable vent (191) and the vent (191) is connected to the air inlet (11).

2. The volute assembly according to claim 1, characterized in that, The movable volute (2) has a first air outlet position and a second air outlet position. When the movable volute (2) is in the first air outlet position, the first air outlet (12) and the volute chamber (15) are separated by the movable volute (2), the second air outlet (13) is connected to the volute chamber (15), the vent (191) is in the open state, the airflow entering the first air outlet (12) flows through the guide part (14), enters the fluid chamber (16) through the first through hole (141), and then enters the air inlet (11) through the vent (191). When the movable volute (2) is in the second air outlet position, the second air outlet (13) and the volute chamber (15) are separated by the movable volute (2), the first air outlet (12) is connected to the volute chamber (15), the ventilation port (191) is in a closed state, the airflow inside the volute chamber (15) flows through the guide part (14), enters and exits the fluid chamber (16) through the first through hole (141), and then flows out through the first air outlet (12).

3. The volute assembly according to claim 2, characterized in that, The volute body (1) includes a first air duct (17), which is connected to the volute chamber (15) and the first air outlet (12) respectively; the guide part (14) is integrated on the inner wall of the first air duct (17); When the movable volute (2) is in the first air outlet position, the guide section (14) and the volute chamber (15) are separated by the movable volute (2). When the movable volute (2) is in the second air outlet position, the guide section (14) and the volute chamber (15) are connected.

4. The volute assembly according to claim 2, characterized in that, The volute body (1) includes a second air duct (18), which is connected to the volute chamber (15) and the second air outlet (13) respectively. Multiple second through holes (181) are provided on the side wall of the second air duct (18). When the movable volute (2) is in the second air outlet position, the airflow entering the second air inlet (13) flows through the second through hole (181) to the air inlet (11), and then flows into the volute chamber (15) through the air inlet (11).

5. The volute assembly according to any one of claims 1 to 4, characterized in that, The flow guide (14) includes an arc-shaped plate (142) protruding toward the interior of the volute body (1), and a plurality of first through holes (141) are evenly distributed on the arc-shaped plate (142).

6. The volute assembly according to any one of claims 1 to 4, characterized in that, The end of the volute body (1) is also provided with a flow channel (19), which is connected to the fluid chamber (16), and the vent (191) is located on the side of the flow channel (19) facing the air inlet (11).

7. The volute assembly according to claim 6, characterized in that, It also includes a blocking component (4) that is configured to correspond to the vent (191) and is used to control the opening and closing of the vent (191).

8. The volute assembly according to claim 7, characterized in that, The sealing assembly (4) includes an elastic seal (41), and the vent (191) is provided with a contact surface (192) that matches the elastic seal (41).

9. The volute assembly according to claim 7, characterized in that, The sealing component (4) is connected to the movable volute (2) for transmission, so as to realize the linkage between the sealing component (4) and the movable volute (2).

10. A fan, characterized in that, The device includes the volute assembly as described in any one of claims 1 to 9, and further includes a fan blade assembly (5) rotatably disposed inside the volute chamber (15).

11. An indoor unit, characterized in that, The fan as described in claim 10 includes a housing assembly (6) and a baffle assembly (7), wherein the fan is disposed inside the housing assembly (6), and the housing assembly (6) has a third air outlet (61) and a fourth air outlet (62), wherein the third air outlet (61) is correspondingly disposed to the first air outlet (12), and the fourth air outlet (62) is correspondingly disposed to the second air outlet (13); The air inlet (11) is connected to the third air outlet (61) and the fourth air outlet (62) respectively; the baffle assembly (7) is movably disposed inside the housing assembly (6) to realize the switching of the connection state between the air inlet (11) and the third air outlet (61) and the fourth air outlet (62).

12. The indoor unit according to claim 11, characterized in that, The baffle assembly (7) has a first return air position and a second return air position; when the baffle assembly (7) is in the first return air position, the air inlet (11) is connected to the third air outlet (61), and the fourth air outlet (62) is separated from the air inlet (11) by the baffle assembly (7); the movable volute (2) is in the first air outlet position, the first air outlet (12) is separated from the volute chamber (15) by the movable volute (2), the second air outlet (13) is connected to the volute chamber (15), and the ventilation port (191) is in the open state; When the baffle assembly (7) is in the second return air position, the air inlet (11) is connected to the fourth air outlet (62), and the third air outlet (61) is separated from the air inlet (11) by the baffle assembly (7); when the movable volute (2) is in the second air outlet position, the second air outlet (13) is separated from the volute chamber (15) by the movable volute (2), the first air outlet (12) is connected to the volute chamber (15), and the ventilation port (191) is in the closed state.

13. The indoor unit according to claim 12, characterized in that, The baffle assembly (7) is equipped with a sealing assembly (4) for controlling the opening and closing of the vent (191).

14. The indoor unit according to claim 11, characterized in that, The number of fans is multiple, and the multiple fans are arranged side by side inside the housing assembly (6). The air inlet (11) is provided at both ends of the volute body (1), and the ends of two adjacent fans are connected by the baffle assembly (7).

15. The indoor unit according to any one of claims 11 to 14, characterized in that, The cover plate (3) is integrated onto the housing assembly (6).

16. An air conditioning device, characterized in that, Including the indoor unit as described in claims 12 to 15.

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