Space ventilation device

Abstract

The utility model discloses a space ventilation device which comprises a shell, the interior of the shell is hollow, a containing cavity is formed in the shell, a driving assembly is arranged in the containing cavity, a fan assembly is installed on an output shaft of the driving assembly, and an opening is formed in one end of the shell so that an air inlet can be formed in the opening; wherein an air inlet is formed in one end of the shell, an air outlet is formed in the side surface of the shell, the rotating axis of the fan assembly is parallel to the axis of the air inlet, and the axis of the air outlet and the axis of the air inlet are arranged to form an included angle. The included angle between the axis of the air inlet and the axis of the air outlet is set, so that the device can be more flexibly matched when facing different installation scenes and can adapt to the installation environment, and an air inlet channel and an air outlet channel do not need to be additionally installed.

Description

Technical Field

[0001] The utility model relates to the technical field related to indoor ventilation, and in particular to a space ventilation device. Background Art

[0002] The function of space ventilation devices is mainly to improve indoor air quality and ensure the freshness and comfort of air through the circulation and exchange of air. With the improvement of the quality of life, most families, companies and factories will install ventilation devices to enhance the circulation of indoor and outdoor air, thereby improving the comfort of the living environment. Existing ventilation devices are generally installed on the wall. If the ventilation device is set outdoors as a whole, the device itself may be at risk of falling during long-term use, and it also brings a safety hazard of falling from a height to outdoor maintenance personnel. Therefore, the ventilation device is generally installed indoors and located on the ceiling. The ceiling has the effect of hiding the ventilation device. However, in order to ensure the smooth airflow path in the ventilation device, the air inlet and outlet of the ventilation device are often coaxially arranged, and the wall and the ceiling are arranged at an angle. Therefore, the ventilation device often needs to design and add air inlet ducts and / or air outlet ducts during installation, which will make its installation steps complicated and cannot meet the needs of users. Utility Model Content

[0003] The purpose of the utility model is to provide a space ventilation device, aiming to solve at least one of the technical problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present utility model provides a space ventilation device, which includes:

[0005] A housing, wherein the interior of the housing is hollow to form a receiving cavity in the housing, a drive assembly is disposed in the receiving cavity, a fan assembly is mounted on an output shaft of the drive assembly, and one end of the housing is open to form an air inlet at the opening;

[0006] An air outlet is provided on the side surface of the shell, the rotation axis of the fan assembly is arranged parallel to the axis of the air inlet, and the axis of the air outlet is arranged at an angle to the axis of the air inlet.

[0007] Furthermore, the axis of the air outlet is arranged perpendicular to the axis of the air inlet.

[0008] Furthermore, the fan assembly includes:

[0009] a fan frame, the fan frame being mounted on the output shaft of the drive assembly, wherein the center of the upper surface of the fan frame is connected to the output shaft of the drive assembly;

[0010] a plurality of fan blades, the fan blades being circumferentially spaced apart and arranged on the lower surface of the fan frame;

[0011] A hoop is installed at the ends of the plurality of fan blades so as to relatively fix the ends of the plurality of fan blades through the hoop.

[0012] Furthermore, the housing includes:

[0013] shell;

[0014] a first connecting portion, the first connecting portion being arranged at the air inlet;

[0015] A second connecting portion is provided at the air outlet.

[0016] Furthermore, an air filter assembly is mounted on the first connecting portion, and first buckling protrusions are arranged at intervals along the circumferential direction on the air filter assembly;

[0017] Wherein, the first connecting portion is provided with a second snap-fitting protrusion corresponding to the first snap-fitting protrusion, so that the air filter assembly can be installed on the first connecting portion by snapping the first snap-fitting protrusion onto the second snap-fitting protrusion.

[0018] Furthermore, an air guide plate is installed on the first connecting part, and a third snap-fitting protrusion is provided on the air guide plate. A first snap-fitting groove is provided on the first connecting part, so that the air guide plate can be installed on the first connecting part by snapping the third snap-fitting protrusion into the first snap-fitting groove. An abutting protrusion is also provided on the air guide plate, and the abutting protrusion abuts against the inner wall of the outer shell.

[0019] Furthermore, one end of the air guide plate is connected to the first connection portion, and the other end of the air guide plate extends toward the axial direction of the fan assembly to the bottom of the fan assembly.

[0020] Furthermore, a dust cover is provided on the second connecting portion, the dust cover is hollow, and both ends of the dust cover are open, an elastic buckle plate is provided on the outer peripheral surface of the dust cover, and a shielding sheet assembly is also provided in the dust cover;

[0021] Wherein, a second buckling groove is provided on the second connecting portion, so that the dust cover can be installed on the second connecting portion through the buckling connection between the elastic buckling plate and the second buckling groove.

[0022] Furthermore, the shielding sheet assembly includes:

[0023] There are two rotating shafts, and the rotating shafts are spaced apart and coaxially arranged on the inner wall of the dust cover;

[0024] a baffle, an edge of which is connected to the rotating shaft;

[0025] The axis of the rotating shaft is perpendicular to the axis of the dust cover, and the rotating shaft is arranged at an eccentric position pointing toward the dust cover.

[0026] Furthermore, a connection structure is provided on the outer surface of the shell, so that the shell can be mounted on the installation surface through the connection structure and a spring buckle.

[0027] From the above technical solution, it can be seen that the space ventilation and air exchange device of the utility model has an opening at one end of the shell, thereby forming an air inlet at the opening; at the same time, an air outlet is opened on the side of the shell, and the axis of the air inlet and the axis of the air outlet are set to form an angle, so that the device can adapt to the installation environment more flexibly when facing different installation scenarios such as when the wall and the ceiling are at an angle. There is no need to install air inlet and air outlet channels separately. The air inlet can be directly connected to the air vent opened on the wall or ceiling, and the air outlet can be connected to another air vent on the wall or ceiling. The design is ingenious. It is easy to install and use. The rotation axis of the fan assembly is arranged parallel to the axis of the air inlet. With this arrangement, when the fan assembly is started, air can be guided into the space ventilation device. The fan assembly divides the accommodating chamber into an air inlet chamber and an air outlet chamber. When the fan assembly is started, air first enters the air inlet chamber. This is because the rotation of the fan assembly generates negative pressure, which attracts air in. Then, the air enters the air outlet chamber and rotates in one direction in the air outlet chamber. This is because the rotation of the fan assembly drives the air flow, forming a specific airflow direction in the air outlet chamber. Finally, the air is discharged from the air outlet. The rotation axis of the fan assembly is arranged parallel to the axis of the air inlet, so that the airflow path in the space ventilation device is unobstructed.

[0028] In order to make the technical concept and other purposes, advantages, features and functions of the present invention more clearly understood, preferred embodiments will be specifically cited in the following specific implementation manner and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a three-dimensional diagram of a space ventilation device provided by an embodiment of the present application;

[0031] Figure 2 This is a structural exploded diagram of a space ventilation device provided by an embodiment of the present application;

[0032] Figure 3 This is a structural exploded view of a space ventilation device provided by an embodiment of the present application from another perspective;

[0033] Figure 4 is a cross-sectional view of a space ventilation device provided by an embodiment of the present application;

[0034] Figure 5 This is an exploded view of the structure of the dust cover provided in an embodiment of the present application;

[0035] Figure 6 is a top view of the air filter assembly provided in an embodiment of the present application;

[0036] The above drawings include the following reference numerals:

[0037] 100, housing; 110, accommodating chamber; 120, air inlet; 130, air outlet; 140, outer shell; 150, first connecting portion; 151, air filter assembly; 152, first fastening protrusion; 153, second fastening protrusion; 154, air guide plate; 154a, third fastening protrusion; 154b, abutting protrusion; 155, first fastening groove; 160, second connecting portion; 161, dust cover; 161a, elastic fastening plate; 161b, shielding plate assembly; 161c, rotating shaft; 161d, baffle; 162, second fastening groove;

[0038] 200, drive assembly;

[0039] 300, fan assembly; 310, fan frame; 320, fan blades; 330, hoop;

[0040] 400. Connection structure. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of this application.

[0042] Please also refer to Figures 1 to 6 This embodiment provides a space ventilation device, the main points of which include:

[0043] The shell 100 is hollow inside so as to form a receiving chamber 110 in the shell 100. A driving assembly 200 is arranged in the receiving chamber 110. A fan assembly 300 is mounted on the output shaft of the driving assembly 200. One end of the shell 100 is opened to form an air inlet 120 at the opening. An air outlet 130 is provided on the side surface of the shell 100. The rotation axis of the fan assembly 300 is parallel to the axis of the air inlet 120, and the axis of the air outlet 130 is arranged at an angle to the axis of the air inlet 120.

[0044] It can be seen that a space ventilation and air exchange device of the present invention forms an air inlet 120 at the opening by opening at one end of the shell 100; at the same time, an air outlet 130 is opened on the side of the shell 100, and the axis of the air inlet 120 and the axis of the air outlet 130 are set to form an angle, so that the device can adapt to the installation environment more flexibly when facing different installation scenarios such as when the wall and the ceiling are at an angle. There is no need to install air inlet and air outlet channels separately. The air inlet 120 can be directly connected to the air vent opened on the wall or ceiling, and the air outlet 130 can be connected to another air vent on the wall or ceiling, wherein the rotation axis of the fan assembly 300 is set parallel to the axis of the air inlet 120. When the fan assembly 300 is started, the air can be guided into the space ventilation device. The fan assembly 300 divides the accommodating chamber 110 into an air inlet chamber and an air outlet chamber. When the fan assembly 300 is started, the air first enters the air inlet chamber. This is because the rotation of the fan assembly 300 generates negative pressure, which attracts air in. Then, the air enters the air outlet chamber and rotates in one direction in the air outlet chamber. This is because the rotation of the fan assembly 300 drives the air flow, forming a specific airflow direction in the air outlet chamber. Finally, the air is discharged from the air outlet 130. The rotation axis of the fan assembly 300 is arranged parallel to the axis of the air inlet 120, so that the airflow path in the space ventilation device is unobstructed.

[0045] The driving assembly 200 is composed of a motor and a rotating shaft, which is a prior art and will not be described in detail here.

[0046] Preferably, please also refer to Figures 1 to 4 The axis of the air outlet 130 is arranged perpendicular to the axis of the air inlet 120.

[0047] Among them, in general installation scenarios, the wall and ceiling are set vertically. In addition, the vertical layout design makes the direction of airflow easier to control and can avoid dead corners or backflow of air flow. This structure helps the air flow more smoothly and improves ventilation efficiency, thereby effectively improving indoor air quality.

[0048] In this embodiment, please refer to Figures 1 to 4The fan assembly 300 includes: a fan frame 310, a plurality of fan blades 320 and a hoop 330. The fan frame 310 is installed on the output shaft of the driving assembly 200. The center of the upper surface of the fan frame 310 is connected to the output shaft of the driving assembly 200. The fan blades 320 are arranged at intervals along the circumferential direction on the lower surface of the fan frame 310. The hoop 330 is installed at the ends of the plurality of fan blades 320 to relatively fix the ends of the plurality of fan blades 320 through the hoop 330.

[0049] Among them, the fan frame 310 is connected to the output shaft of the drive assembly 200 so that the fan frame 310 can rotate. The fan frame 310 provides a supporting platform for installing and fixing multiple fan blades 320, thereby forming a complete fan system. The fan blades 320 are fixed to the lower surface of the fan frame 310 through the fan frame 310 and are arranged at intervals along the circumference. The rotation of the fan blades 320 generates air flow, sucking air from the air inlet 120 and discharging it through the air outlet 130; the configuration of multiple fan blades 320 can improve the air flow and efficiency of the fan, thereby enhancing the ventilation effect; the hoop 330 is located at the ends of the multiple fan blades 320, which fixes the ends of the multiple fan blades 320 together to maintain the stability and relative position between the fan blades 320. Through this fixation, the hoop 330 ensures that the fan blades 320 can remain stable during high-speed rotation, preventing the fan blades 320 from colliding with each other or deviating, thereby improving the stability and operating efficiency of the fan.

[0050] Further, please also refer to Figures 1 to 4 The housing 100 includes a shell 140 , a first connecting portion 150 and a second connecting portion 160 , the first connecting portion 150 being disposed at the air inlet 120 , and the second connecting portion 160 being disposed at the air outlet 130 .

[0051] Among them, the shell 140 serves as the shell 140 frame of the entire ventilation device, which is used to protect the internal components of the device and provide support for installing and connecting other components; the first connecting part 150 is located at the air inlet 120, for installing the air filter component 151, and the air filter component 151 can be easily installed and removed through the first connecting part 150; the second connecting part 160 is located at the air outlet 130, mainly used for installing the dust cover 161, and at the same time, the setting of the second connecting part 160 facilitates the installation and removal of the dust cover 161.

[0052] Further, please also refer to Figures 1 to 6A wind filter assembly 151 is installed on the first connecting portion 150, and first snap-fit ​​protrusions 152 are arranged on the wind filter assembly 151 at intervals along the circumferential direction; wherein, a second snap-fit ​​protrusion 153 corresponding to the first snap-fit ​​protrusion 152 is provided on the first connecting portion 150, so that the wind filter assembly 151 can be installed on the first connecting portion 150 by snapping the first snap-fit ​​protrusion 152 onto the second snap-fit ​​protrusion 153.

[0053] Among them, the first connecting part 150 is arranged at the air inlet 120, and the air filter assembly 151 is installed on the first connecting part 150 to filter the air entering the device; the first connecting part 150 is provided with a first snap-fit ​​protrusion 152, which cooperates with the second snap-fit ​​protrusion 153 on the air filter assembly 151. By snapping the first snap-fit ​​protrusion 152 and the second snap-fit ​​protrusion 153 together, the air filter assembly 151 can be conveniently fixed on the first connecting part 150; the design of this snap-fit ​​structure enables the air filter assembly 151 to be easily installed, disassembled or replaced, avoiding the trouble of complex tools that may be required in traditional designs. Regular cleaning or replacement of the air filter assembly 151 helps to ensure air quality.

[0054] Further, please also refer to Figures 1 to 4 A wind guide plate 154 is also installed on the first connecting part 150, and a third snap-fitting protrusion 154a is provided on the wind guide plate 154. A first snap-fitting groove 155 is opened on the first connecting part 150, so that the wind guide plate 154 can be installed on the first connecting part 150 by snapping the third snap-fitting protrusion 154a into the first snap-fitting groove 155. A supporting protrusion 154b is also provided on the wind guide plate 154, and the supporting protrusion 154b is in contact with the inner wall of the outer shell 140.

[0055] The function of the air deflector 154 is to guide air toward the fan assembly 300. Through proper design and installation, the air deflector 154 can effectively adjust the direction of air flow, reduce wind resistance or uneven airflow distribution, and improve the efficiency of the ventilation system. The air deflector 154 is removably connected to the first connecting portion 150 by inserting the third snap-fitting protrusion 154a on the air deflector 154 into the first snap-fitting groove 155 on the first connecting portion 150. The air deflector 154 is also provided with abutting protrusions 154b, which contact the inner wall of the housing 100, ensuring that the air deflector 154 forms a good seal and a secure fit with the housing 140 when installed. This not only ensures that the air deflector 154 does not become loose, but also optimizes air circulation.

[0056] Further, please also refer to Figures 1 to 4 One end of the air guide plate 154 is connected to the first connecting portion 150 , and the other end of the air guide plate 154 extends toward the axis of the fan assembly 300 to the bottom of the fan assembly 300 .

[0057] Among them, the wind guide plate 154 structurally plays the role of guiding the air flow to the fan assembly 300, ensuring that the air from the air inlet 120 can smoothly pass through the fan and enter the air outlet 130, thereby improving the air circulation efficiency. The wind guide plate 154 helps to concentrate the air flow from the air inlet 120 to the fan assembly 300 area, avoiding uneven air flow or dead corners, thereby enhancing the overall ventilation effect.

[0058] Further, please also refer to Figures 1 to 5 A dust cover 161 is provided on the second connecting part 160. The dust cover 161 is hollow and both ends of the dust cover 161 are open. An elastic snap-fit ​​plate 161a is provided on the outer peripheral surface of the dust cover 161, and a shielding piece assembly 161b is also provided in the dust cover 161; wherein, a second snap-fit ​​groove 162 is provided on the second connecting part 160, so that the dust cover 161 can be installed on the second connecting part 160 through the snap-fit ​​connection between the elastic snap-fit ​​plate 161a and the second snap-fit ​​groove 162.

[0059] Among them, the dust cover 161 can cover the air outlet 130 of the device, preventing external dust or debris from entering the fan assembly 300 and other internal components, reducing the frequency of cleaning and maintenance, and maintaining the air circulation and filtration effects; the outer surface of the dust cover 161 is provided with an elastic snap-fit ​​plate 161a, which can be easily connected to the snap-fit ​​groove of the second connecting part 160, facilitating installation and disassembly.

[0060] Furthermore, the shielding plate assembly 161b includes: a rotating shaft 161c and a baffle 161d, the number of the rotating shafts 161c is two, and the rotating shafts 161c are spaced and coaxially arranged on the inner wall of the dust cover 161, and the edge of the baffle 161d is connected to the rotating shaft 161c; wherein, the axis of the rotating shaft 161c is perpendicular to the axis of the dust cover 161, and the rotating shaft 161c is arranged at an eccentric position pointing toward the dust cover 161.

[0061] The shielding piece assembly 161b is set up in this way. When the space ventilation device is not in use, the shielding piece can block the air outlet 130 to prevent external dust or debris from entering the fan assembly 300 and other internal components. When the space ventilation device is started, the airflow flows out from the air outlet 130, and the shielding piece is blown by the airflow to rotate around the rotating shaft 161c. However, since the axis of the rotating shaft 161c is perpendicular to the axis of the dust cover 161, and the rotating shaft 161c is set at an eccentric point pointing to the dust cover 161, the shielding piece will not always rotate with the flow of air. In addition, since the space ventilation device is generally installed at a higher position, it is difficult to judge the working status of the space ventilation device. The user can also judge the working status of the space ventilation device through the status of the shielding piece.

[0062] In this embodiment, please refer to Figures 1 to 4Furthermore, a connection structure 400 is provided on the outer surface of the housing 100 so that the housing 100 can be mounted on the placement surface through the connection structure 400 and the spring buckle.

[0063] Among them, the connecting structure 400 is specifically composed of a cylinder and two limit plates, and the spring clip is an existing technology. It can fix this kind of space ventilation device to the installation surface through the connecting structure 400. The installation surface can be a wall, eaves or ceiling, etc.

[0064] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0065] By opening at one end of the shell 100, an air inlet 120 is formed at the opening; at the same time, an air outlet 130 is opened on the side of the shell 100, and the axis of the air inlet 120 and the axis of the air outlet 130 are set to form an angle, so that the device can adapt to the installation environment more flexibly when facing different installation scenarios such as when the wall and the ceiling are at an angle. There is no need to install an air inlet channel and an air outlet channel separately. The air inlet 120 can be directly connected to the vent opened on the wall or ceiling, and the air outlet 130 can be connected to another vent on the wall or ceiling. The rotation axis of the fan assembly 300 is set parallel to the axis of the air inlet 120. With this arrangement, when the fan assembly 300 is started, When the fan assembly 300 is started, the air can be guided into the space ventilation device. The fan assembly 300 divides the accommodating chamber 110 into an air inlet chamber and an air outlet chamber. When the fan assembly 300 is started, the air first enters the air inlet chamber. This is because the rotation of the fan assembly 300 generates negative pressure, which attracts air in. Then, the air enters the air outlet chamber and rotates in one direction in the air outlet chamber. This is because the rotation of the fan assembly 300 drives the air flow, forming a specific airflow direction in the air outlet chamber. Finally, the air is discharged from the air outlet 130. The rotation axis of the fan assembly 300 is parallel to the axis of the air inlet 120, so that the airflow path in the space ventilation device is unobstructed.

[0066] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0067] In this specification, the terms "longitudinal," "transverse," "top," "bottom," "inner," "outer," "center," "axial," "radial," "circumferential," etc. are intended only to facilitate description of the present application and to simplify the description of directions or positional relationships shown in the drawings. They do not indicate or imply that the devices or elements involved must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present application.

[0068] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A space ventilation device, characterized in that: include: A housing (100), wherein the interior of the housing (100) is hollow, so that an accommodating chamber (110) is formed in the housing (100), a driving assembly (200) is arranged in the accommodating chamber (110), a fan assembly (300) is mounted on an output shaft of the driving assembly (200), and one end of the housing (100) is open to form an air inlet (120) at the opening; An air outlet (130) is provided on the side surface of the housing (100), the rotation axis of the fan assembly (300) is arranged parallel to the axis of the air inlet (120), and the axis of the air outlet (130) is arranged at an angle to the axis of the air inlet (120).

2. The space ventilation device according to claim 1, characterized in that: The axis of the air outlet (130) is arranged perpendicular to the axis of the air inlet (120).

3. The space ventilation device according to claim 1, characterized in that: The fan assembly (300) comprises: a fan frame (310), the fan frame (310) being mounted on the output shaft of the drive assembly (200), and the center of the upper surface of the fan frame (310) being connected to the output shaft of the drive assembly (200); a plurality of fan blades (320), the fan blades (320) being arranged at intervals along the circumferential direction on the lower surface of the fan frame (310); A hoop (330) is installed at the ends of the plurality of fan blades (320) so as to relatively fix the ends of the plurality of fan blades (320) through the hoop (330).

4. The space ventilation device according to any one of claims 1 to 3, characterized in that: The housing (100) comprises: housing (140); a first connecting portion (150), the first connecting portion (150) being arranged at the air inlet (120); A second connecting portion (160), wherein the second connecting portion (160) is arranged at the air outlet (130).

5. The space ventilation device according to claim 4, characterized in that: An air filter assembly (151) is mounted on the first connecting portion (150), and first buckling protrusions (152) are arranged on the air filter assembly (151) at intervals along the circumferential direction; The first connecting portion (150) is provided with a second fastening protrusion (153) corresponding to the first fastening protrusion (152), so that the air filter assembly (151) can be installed on the first connecting portion (150) by fastening the first fastening protrusion (152) to the second fastening protrusion (153).

6. The space ventilation device according to claim 5, characterized in that: The first connecting portion (150) is also provided with an air guide plate (154), and a third buckling protrusion (154a) is provided on the air guide plate (154). The first connecting portion (150) is provided with a first buckling groove (155), so that the air guide plate (154) can be installed on the first connecting portion (150) by buckling the third buckling protrusion (154a) into the first buckling groove (155). The air guide plate (154) is also provided with abutting protrusion (154b), and the abutting protrusion (154b) abuts against the inner wall of the housing (140).

7. The space ventilation device according to claim 6, characterized in that: One end of the air guide plate (154) is connected to the first connecting portion (150), and the other end of the air guide plate (154) extends in the axial direction of the fan assembly (300) to the bottom of the fan assembly (300).

8. The space ventilation device according to claim 4, characterized in that: A dust cover (161) is provided on the second connecting portion (160); the dust cover (161) is hollow, and both ends of the dust cover (161) are open; an elastic buckle plate (161a) is provided on the outer peripheral surface of the dust cover (161); and a shielding sheet assembly (161b) is further provided in the dust cover (161); The second connecting portion (160) is provided with a second snap-fitting groove (162) so that the dust cover (161) can be mounted on the second connecting portion (160) through snap-fitting connection between the elastic snap-fitting plate (161a) and the second snap-fitting groove (162).

9. The space ventilation device according to claim 8, characterized in that: The shielding piece assembly (161b) comprises: Rotating shafts (161c), the number of the rotating shafts (161c) is two, and the rotating shafts (161c) are spaced apart and coaxially arranged on the inner wall of the dust cover (161); a baffle (161d), wherein an edge of the baffle (161d) is connected to the rotating shaft (161c); The axis of the rotating shaft (161c) is perpendicular to the axis of the dust cover (161), and the rotating shaft (161c) is arranged at an eccentric position pointing toward the dust cover (161).

10. The space ventilation device according to claim 1, characterized in that: A connection structure (400) is provided on the outer surface of the housing (100), so that the housing (100) can be mounted on a placement surface through the connection structure (400) and a spring buckle.

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