Fresh air modules and fresh air equipment

Abstract

This utility model discloses a fresh air module and a fresh air device. The fresh air module includes a housing, a fan, an air damper, and a drive component. The fan is disposed within the housing and includes a volute. The volute has pre-installed holes and limiting members arranged at intervals. The air damper is rotatably disposed within the housing via an air damper shaft, which has an assembly hole. The drive shaft of the drive component is adapted to fit into the pre-installed hole. The drive component rotates to contact the limiting member, thereby adjusting the drive shaft to a preset angle to facilitate its fitting into the assembly hole. The fresh air module provided by this utility model adjusts the drive shaft to a preset angle through the pre-installed holes and limiting members, facilitating the installation of the drive component at the corresponding installation position of the air damper, thus improving installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fresh air system technology, and in particular to a fresh air module and a fresh air device. Background Technology

[0002] In a fresh air module, the motor is the core component for precise control of the damper, used to switch the airflow direction. During installation, the motor shaft needs to be rotated to a preset angle to precisely align with the damper's shaft hole. In related technologies, fresh air modules often employ a compact design, resulting in limited operating space for the motor installation, leading to poor installation convenience and low installation efficiency. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a fresh air module, which has the advantages of convenient motor installation and high installation efficiency.

[0005] An embodiment of this utility model also proposes a fresh air device.

[0006] The fresh air module of this utility model embodiment includes a housing, a fan, an air damper, and a drive component. The fan is disposed inside the housing and includes a volute. The volute has pre-installed holes and limiting members arranged at intervals. The air damper is rotatably disposed inside the housing via an air damper shaft. The air damper shaft has an assembly hole. The drive shaft of the drive component is adapted to fit into the pre-installed hole. The drive component rotates to contact the limiting member so that the drive shaft is adjusted to a preset angle so that the drive shaft fits into the assembly hole.

[0007] The fresh air module of this utility model adjusts the drive shaft to a preset angle through pre-installed holes and limiting parts, so as to facilitate the installation of the drive component at the installation position corresponding to the air damper, thereby improving installation efficiency.

[0008] In some embodiments, the shape and size of the pre-installed hole are the same as the shape and size of the assembly hole.

[0009] In some embodiments, the distance between the pre-installed hole and the limiting member is less than or equal to the farthest distance between the drive shaft and the outer edge of the drive member.

[0010] In some embodiments, the drive shaft has a flattened structure.

[0011] In some embodiments, a pre-installed hole and its corresponding limiting member constitute a set of pre-installed components. The pre-installed components include a first pre-installed component and a second pre-installed component. The volute has an air inlet and an air outlet. The air inlet is located on one side of the volute in a first direction, and the air outlet is located on one side of the volute in a second direction. The first direction is orthogonal to the second direction. The first pre-installed component is adjacent to the air inlet, and the second pre-installed component is adjacent to the air outlet.

[0012] In some embodiments, the air inlet is provided with a guide ring, the guide ring is provided with a protrusion, the pre-installation hole and the limiting member of the first pre-installation component are respectively the first pre-installation hole and the first limiting member, the first pre-installation hole is provided on the protrusion, the first limiting member includes a first limiting plate and a reinforcing rib, the first limiting plate is connected to the guide ring, and the reinforcing rib is connected to the first limiting plate and the guide ring respectively.

[0013] In some embodiments, the air outlet is provided with an air outlet frame, and the volute has an inclined plate intersecting the air outlet frame. The air outlet frame and the inclined plate form a step. The pre-installation hole and the limiting member of the second pre-installation component are respectively a second pre-installation hole and a second limiting member. The second pre-installation hole is provided on the inclined plate, and the second limiting member includes a second limiting plate. The second limiting plate is located at the step and is connected to the air outlet frame and the inclined plate respectively.

[0014] In some embodiments, the volute has a vent located on a third-direction side of the volute, the third direction being orthogonal to the first and second directions. The damper includes a first damper and a second damper. The first damper is used to open and close the vent, and the second damper is used to open and close the air outlet. The drive unit includes a first drive unit and a second drive unit. The drive shaft of the first drive unit is adjusted to a preset angle by the first pre-assembly assembly so that the drive shaft of the first drive unit can be fitted into the mounting hole of the first damper. The drive shaft of the second drive unit is adjusted to a preset angle by the second pre-assembly assembly so that the drive shaft of the second drive unit can be fitted into the mounting hole of the second damper.

[0015] In some embodiments, the installation position of the first drive member and the first damper is a first installation position, the installation position of the first drive member and the first pre-installed component is a first pre-installed position, the first installation position and the first pre-installed position are located on one side of the volute in the first direction and adjacent to the air inlet, the installation position of the second drive member and the second damper is a second installation position, the installation position of the second drive member and the second pre-installed component is a second pre-installed position, the second installation position and the second pre-installed position are located on one side of the volute in the second direction and adjacent to the air outlet.

[0016] The fresh air device according to the embodiments of the present invention includes a fresh air module as described in any of the above embodiments.

[0017] The technical advantages of the fresh air device according to the present utility model embodiment are the same as the technical advantages of the fresh air module in the above embodiment, and will not be repeated here. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the fresh air module according to an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the damper according to an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the driving component according to an embodiment of the present utility model.

[0021] Figure 4 This is a first schematic diagram of the pre-installation process of the first driving component in an embodiment of this utility model.

[0022] Figure 5 This is a second schematic diagram of the pre-installation process of the first driving component in an embodiment of this utility model.

[0023] Figure 6 This is a first schematic diagram of the installation process of the first driving component in an embodiment of this utility model.

[0024] Figure 7 This is a second schematic diagram of the installation process of the first driving component in an embodiment of the present utility model.

[0025] Figure 8 This is a schematic diagram of the first limiting member in an embodiment of the present utility model.

[0026] Figure 9 This is a schematic diagram of the first pre-installed hole in an embodiment of this utility model.

[0027] Figure 10 This is a schematic diagram of the second driving component after installation according to an embodiment of the present invention.

[0028] Figure 11 This is a schematic diagram showing the distribution of the first driving component, the first pre-installed component, the second driving component, and the second pre-installed component according to an embodiment of the present utility model.

[0029] Figure 12 This is a schematic diagram showing the distribution of the first and second air dampers in an embodiment of this utility model.

[0030] Figure label:

[0031] 1. Housing;

[0032] 2. Fan; 21. Volute; 201. Air inlet; 2011. Guide ring; 202. Air outlet; 2021. Air outlet frame; 2022. Inclined plate; 203. Ventilation opening; 211. Pre-installation hole; 2111. First pre-installation hole; 2112. Second pre-installation hole; 2113. Protruding post; 212. Limiting component; 2121. First limiting component; 21211. First limiting plate; 21212. Reinforcing rib; 2122. Second limiting component; 21221. Second limiting plate; 2101. First pre-installation assembly; 2102. Second pre-installation assembly;

[0033] 3. Air damper; 31. First air damper; 32. Second air damper; 301. Air damper pivot; 3011. Assembly hole;

[0034] 4. Driving component; 41. First driving component; 42. Second driving component; 401. Drive shaft; 402. Protective shell; 403. Lug; 404. Slot;

[0035] 10. First installation position; 20. Second installation position; 30. First pre-installation position; 40. Second pre-installation position. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] The following is combined Figures 1-12 This invention describes a fresh air module according to an embodiment of the present invention.

[0038] The fresh air module of this utility model embodiment includes a housing 1, a fan 2, an air damper 3, and a drive component 4. The fan 2 is disposed inside the housing 1, and the air damper 3 is rotatably disposed inside the housing 1 via an air damper shaft 301. The air damper shaft 301 is provided with an assembly hole 3011, and the drive shaft 401 of the drive component 4 is fitted into the assembly hole 3011 to drive the air damper 3 to rotate, thereby controlling the air intake and exhaust of the fan 2.

[0039] The driving component 4 can be a motor, and the drive shaft 401 can be the output shaft of the motor. A protective shell 402 is provided on the outer side of the driving component 4, and lugs 403 are provided on both sides of the protective shell 402. Each lug 403 has a slot 404. The mounting position of the driving component 4 within the housing 1 has a retaining plate corresponding to each of the two slots 404.

[0040] During the installation process, the drive shaft 401 of the drive component 4 is first adjusted to the preset rotation angle, and then the slot 404 of the drive component 4 is aligned with the card plate and moved so that the drive shaft 401 engages with the mounting hole 3011 and the card plate engages with the slot 404, thereby completing the installation of the drive component 4.

[0041] However, due to the limited operating space at the installation location of the drive component 4, it is difficult to make further adjustments to the drive component 4 at its installation position. Therefore, it is necessary to adjust the drive shaft 401 to a preset rotation angle in advance, but in related technologies, operators rely on experience and intuition for adjustment, which has low reliability and leads to a decrease in installation efficiency.

[0042] Therefore, in the fresh air module of this utility model embodiment, a pre-installation hole 211 and a limiting member 212 are provided in the volute 21 of the fan 2, and the pre-installation hole 211 and the limiting member 212 are arranged at intervals. The drive shaft 401 of the drive member 4 is adapted to fit into the pre-installation hole 211. The drive member 4 rotates to contact the limiting member 212 so that the drive shaft 401 is adjusted to a preset rotation angle so that the drive shaft 401 fits into the assembly hole 3011.

[0043] First, such as Figure 4 As shown, before installation, drive component 4 is placed in the pre-installation position, and the drive shaft 401 of drive component 4 is fitted into the pre-installation hole 211. Then, as... Figure 5 As shown, the drive shaft 401 is adjusted to a preset rotation angle by rotating the drive component 4 into contact with the limiting component 212. Then, as... Figure 6 As shown, place the drive component 4 in the installation position, aligning the drive shaft 401 of the drive component 4 with the mounting hole 3011, and at this time, the slot 404 of the drive component 4 is also aligned with the plate. Finally, as... Figure 7 As shown, press the drive component 4 so that the drive shaft 401 fits into the mounting hole 3011, and the slot 404 and the plate cooperate with each other.

[0044] The fresh air module of this utility model adjusts the drive shaft 401 to a preset angle through the pre-installation hole 211 and the limiting member 212, so as to facilitate the installation of the drive member 4 at the installation position corresponding to the damper 3, thereby improving installation efficiency. Furthermore, mechanical constraints avoid errors caused by human experience.

[0045] By employing a step-by-step installation process (pre-installation ~ rotation adjustment ~ final installation), the random adjustments inherent in the relevant technology are broken down into standardized operations. After initial positioning within the pre-installation hole 211, angle adjustment can be completed simply by rotating the drive component 4 to contact the limiting component 212, eliminating the need for repeated fine-tuning and improving the efficiency of angle adjustment.

[0046] In some embodiments, such as Figure 2 and Figure 9 As shown, the shape and size of the pre-installed hole 211 are the same as those of the assembly hole 3011. The design of holes of the same size can avoid assembly failure due to size errors and reduce the complexity of processing holes of different specifications.

[0047] For example, both the pre-mounted hole 211 and the mounting hole 3011 are surrounded by two oppositely arranged arcuate hole walls and two oppositely arranged planar hole walls, so as to adapt them to the flat structure of the drive shaft 401.

[0048] In some embodiments, such as Figure 2 and Figure 3 As shown, the drive shaft 401 has a flat structure. That is, one or more planar grooves are cut axially at the end of the cylindrical shaft so that after the drive shaft 401 fits into the mounting hole 3011, relative rotation between the drive shaft 401 and the damper shaft 301 occurs, thereby improving the stability of the assembly.

[0049] For example, two opposing planar grooves are cut along the axial direction at the end of the drive shaft 401 to form a double-flat structure, which reduces the imbalance when the drive shaft 401 drives the damper shaft 301 to rotate compared to a single-sided flat structure.

[0050] In some embodiments, such as Figure 4 and Figure 5 As shown, the distance between the pre-installed hole 211 and the limiting member 212 is less than or equal to the farthest distance between the drive shaft 401 and the outer edge of the drive member 4, ensuring that the drive member 4 can contact the limiting member 212 by rotating the drive member 4.

[0051] The distance between the pre-mounted hole 211 and the limiting member 212 is strictly controlled to be less than or equal to the range of motion of the outer edge of the driving member 4. That is, when the driving member 4 rotates, its outer edge must cover the position of the limiting member 212. The rotation angle of the driving shaft 401 is fixed by the physical obstruction of the limiting member 212.

[0052] In some embodiments, such as Figure 6 and Figure 10As shown, a pre-installation hole 211 and its corresponding limiting member 212 constitute a set of pre-installation components. The pre-installation components include a first pre-installation component 2101 and a second pre-installation component 2102. The volute 21 has an air inlet 201 and an air outlet 202. The air inlet 201 is located on one side of the volute 21 in a first direction, and the air outlet 202 is located on one side of the volute 21 in a second direction, with the first direction orthogonal to the second direction. The first pre-installation component 2101 is adjacent to the air inlet 201, and the second pre-installation component 2102 is adjacent to the air outlet 202.

[0053] For example, such as Figure 11 As shown, the three-dimensional axes of the fresh air module in this embodiment of the present invention are X, Y, and Z, respectively. The first direction can be the extension direction of the Z axis, and the second direction can be the extension direction of the X axis. The air inlet 201 draws in air along the negative direction of the Z axis, and the air outlet 202 discharges air along the positive direction slightly inclined to the X axis. Both the air inlet 201 and the air outlet 202 are unidirectional ventilation.

[0054] The layout of the first pre-installed component 2101 and the second pre-installed component 2102 is directly related to the physical positions of the air inlet 201 and the air outlet 202, enabling operators to complete the convenient installation of the drive components 4 corresponding to different dampers 3 step by step according to the area, thereby improving the overall installation efficiency.

[0055] In some embodiments, such as Figures 4-9 As shown, the air inlet 201 is provided with a guide ring 2011, and the guide ring 2011 is provided with a protrusion 2113. The pre-installation hole 211 and the limiting member 212 of the first pre-installation component 2101 are respectively the first pre-installation hole 2111 and the first limiting member 2121, and the first pre-installation hole 2111 is provided on the protrusion 2113. The first limiting member 2121 includes a first limiting plate 21211 and a reinforcing rib 21212. The first limiting plate 21211 is connected to the guide ring 2011, and the reinforcing rib 21212 is connected to both the first limiting plate 21211 and the guide ring 2011.

[0056] The center of the air guide ring 2011 is provided with a grid to optimize the airflow direction and distribution. Due to the need for lightweight structure, the air guide ring 2011 itself is relatively thin and cannot be directly machined to meet the depth requirement of the first pre-installed hole 2111. Therefore, a protruding post 2113 is set as a local thickening area of ​​the air guide ring 2011 to ensure the machining depth of the first pre-installed hole 2111.

[0057] The reinforcing rib 21212 is used to increase the thickness and rigidity of the first limiting plate 21211, significantly improving the bending and torsional resistance of the first limiting plate 21211, and preventing the first limiting plate 21211 from deforming or breaking due to the torque of the drive component 4 during rotation.

[0058] In some embodiments, such as Figure 10 and Figure 11As shown, the air outlet 202 is provided with an air outlet frame 2021, and the volute 21 has an inclined plate 2022 that intersects with the air outlet frame 2021. The air outlet frame 2021 and the inclined plate 2022 form a step. The pre-installation hole 211 and the limiting member 212 of the second pre-installation component 2102 are respectively the second pre-installation hole 2112 and the second limiting member 2122. The second pre-installation hole 2112 is provided on the inclined plate 2022, and the second limiting member 2122 includes a second limiting plate 21221. The second limiting plate 21221 is located at the step and is connected to the air outlet frame 2021 and the inclined plate 2022 respectively.

[0059] The thickness of the inclined plate 2022 meets the machining depth of the second pre-installed hole 2112, so the second pre-installed hole 2112 can be directly set on the inclined plate 2022 without the need for additional structures (such as protruding pillars 2113) for local thickening. The second limiting plate 21221 is connected to the air outlet frame 2021 and the inclined plate 2022 respectively through its two vertical end faces, forming a beam structure fixed at both ends. It has sufficient rigidity, unlike the cantilever beam structure of the first limiting plate 21211 which is only connected to one end face, and therefore does not require additional reinforcement.

[0060] In some embodiments, such as Figure 11 and Figure 12 As shown, the volute 21 has a vent 203, which is located on one side of the volute 21 in a third direction, which is orthogonal to the first and second directions. For example, the third direction can be the extension direction of the Y-axis, and the vent 203 provides ventilation along the extension direction of the Y-axis, thus providing bidirectional ventilation.

[0061] The damper 3 includes a first damper 31 and a second damper 32. The first damper 31 is used to open and close the vent 203, and the second damper 32 is used to open and close the air outlet 202. The drive unit 4 includes a first drive unit 41 and a second drive unit 42. The drive shaft 401 of the first drive unit 41 is adjusted to a preset angle by the first pre-installation assembly 2101 so that the drive shaft 401 of the first drive unit 41 can be fitted into the mounting hole 3011 of the first damper 31. The drive shaft 401 of the second drive unit 42 is adjusted to a preset angle by the second pre-installation assembly 2102 so that the drive shaft 401 of the second drive unit 42 can be fitted into the mounting hole 3011 of the second damper 32.

[0062] The first damper 31 controls the opening and closing of the vent 203, ensuring that the airflow enters the fan 2 according to the designed path (such as fresh air / return air switching). The second damper 32 controls the opening and closing of the outlet 202, adjusting the direction of airflow discharge. Through independent first drive unit 41 and second drive unit 42, the first damper 31 and the second damper 32 are ensured to be adjusted independently.

[0063] The grouping design of the first pre-installed component 2101 and the second pre-installed component 2102 is directly related to the position of the damper 3, allowing operators to install them step by step according to the area, reducing operational complexity.

[0064] In some embodiments, such as Figures 4-7 as well as Figure 10 and Figure 11 As shown, the first drive unit 41 and the first damper 31 are installed at the first installation position 10, and the first drive unit 41 and the first pre-installed assembly 2101 are installed at the first pre-installed position 30. The first installation position 10 and the first pre-installed position 30 are located on one side of the volute 21 in the first direction and are adjacent to the air inlet 201. The second drive unit 42 and the second damper 32 are installed at the second installation position 20, and the second drive unit 42 and the second pre-installed assembly 2102 are installed at the second pre-installed position 40. The second installation position 20 and the second pre-installed position 40 are located on one side of the volute 21 in the second direction and are adjacent to the air outlet 202.

[0065] The drive unit 4 is connected to the control system via wiring. If the pre-installed position and the installation position of each drive unit 4 are not on the same side, the drive unit 4 needs to move a long distance when adjusting the angle, which will cause the wiring to be stretched or bent. Arranging them on the same side can minimize the distance that the drive unit 4 moves between the pre-installed position and the installation position, avoiding wiring breakage or poor contact due to stretching.

[0066] The pre-installation position is used to adjust the angle of the drive shaft 401, while the installation position is used for final fixation. If the two are not on the same side, the drive component 4 needs to be moved from the pre-installation position to the installation position, which may be difficult to operate due to space limitations or wiring obstructions. Arranging them on the same side allows for direct movement of the drive component 4 without having to bypass other components, reducing operation steps and time.

[0067] The fresh air device according to the embodiments of this utility model includes a fresh air module as described in any of the above embodiments.

[0068] The technical advantages of the fresh air device according to the present utility model embodiment are the same as the technical advantages of the fresh air module in the above embodiment, and will not be repeated here.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fresh air module, characterized in that The device includes a housing (1), a fan (2), a damper (3), and a drive unit (4). The fan (2) is located inside the housing (1). The fan (2) includes a volute (21). The volute (21) is provided with pre-installed holes (211) and a limiting member (212) arranged at intervals. The damper (3) is rotatably located inside the housing (1) via a damper pivot (301). The damper pivot (301) is provided with an assembly hole (3011). The drive shaft (401) of the drive unit (4) is adapted to fit into the pre-installed hole (211). The drive unit (4) rotates to contact the limiting member (212) so that the drive shaft (401) is adjusted to a preset angle so that the drive shaft (401) fits into the assembly hole (3011).

2. Fresh air module according to claim 1, characterized in that The shape and size of the pre-installed hole (211) are the same as the shape and size of the assembly hole (3011).

3. The fresh air module of claim 1, wherein, The distance between the pre-installed hole (211) and the limiting member (212) is less than or equal to the farthest distance between the drive shaft (401) and the outer edge of the drive member (4).

4. The fresh air module of claim 1, wherein, The drive shaft (401) has a flat structure.

5. Fresh air module according to any of claims 1-4, characterized in that, A pre-installation hole (211) and its corresponding limiting member (212) constitute a set of pre-installation components. The pre-installation components include a first pre-installation component (2101) and a second pre-installation component (2102). The volute (21) has an air inlet (201) and an air outlet (202). The air inlet (201) is located on one side of the volute (21) in a first direction, and the air outlet (202) is located on one side of the volute (21) in a second direction. The first direction is orthogonal to the second direction. The first pre-installation component (2101) is adjacent to the air inlet (201), and the second pre-installation component (2102) is adjacent to the air outlet (202).

6. Fresh air module according to claim 5, characterized in that The air inlet (201) is provided with a guide ring (2011), and the guide ring (2011) is provided with a protrusion (2113). The pre-installation hole (211) and the limiting member (212) of the first pre-installation component (2101) are respectively the first pre-installation hole (2111) and the first limiting member (2121). The first pre-installation hole (2111) is provided on the protrusion (2113). The first limiting member (2121) includes a first limiting plate (21211) and a reinforcing rib (21212). The first limiting plate (21211) is connected to the guide ring (2011), and the reinforcing rib (21212) is connected to the first limiting plate (21211) and the guide ring (2011) respectively.

7. Fresh air module according to claim 5, characterized in that The air outlet (202) is provided with an air outlet frame (2021), and the volute (21) has an inclined plate (2022) that intersects with the air outlet frame (2021). The air outlet frame (2021) and the inclined plate (2022) form a step. The pre-installation hole (211) and the limiting member (212) of the second pre-installation component (2102) are respectively the second pre-installation hole (2112) and the second limiting member (2122). The second pre-installation hole (2112) is provided on the inclined plate (2022). The second limiting member (2122) includes a second limiting plate (21221). The second limiting plate (21221) is located at the step and is connected to the air outlet frame (2021) and the inclined plate (2022) respectively.

8. Fresh air module according to claim 5, characterized in that The volute (21) has a vent (203) located on one side of the volute (21) in a third direction, which is orthogonal to the first and second directions. The damper (3) includes a first damper (31) and a second damper (32). The first damper (31) is used to open and close the vent (203), and the second damper (32) is used to open and close the air outlet (202). The drive unit (4) includes a first drive unit (41) and a second drive unit (42). The drive shaft (401) of the first drive unit (41) is adjusted to a preset angle by the first pre-installation component (2101) so that the drive shaft (401) of the first drive unit (41) can be fitted into the mounting hole (3011) of the first damper (31). The drive shaft (401) of the second drive unit (42) is adjusted to a preset angle by the second pre-installation component (2102) so that the drive shaft (401) of the second drive unit (42) can be fitted into the mounting hole (3011) of the second damper (32).

9. Fresh air module according to claim 8, characterized in that The installation position of the first drive unit (41) and the first damper (31) is the first installation position (10), and the installation position of the first drive unit (41) and the first pre-installed assembly (2101) is the first pre-installed position (30). The first installation position (10) and the first pre-installed position (30) are located on one side of the volute (21) in the first direction and are adjacent to the air inlet (201). The second drive unit (42) and the second damper (32) are installed at the second installation position (20), and the second drive unit (42) and the second pre-installed assembly (2102) are installed at the second pre-installed position (40). The second installation position (20) and the second pre-installed position (40) are located on one side of the volute (21) in the second direction and are adjacent to the air outlet (202).

10. A fresh air device, characterized by Includes the fresh air module according to any one of claims 1-9.

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