Indoor ventilation device

Abstract

The utility model discloses an indoor ventilation device, which relates to the field of ventilation equipment and comprises an air pipe, one end of the air pipe is provided with an air inlet penetrating through indoor space, the other end of the air pipe is provided with an air outlet connected with a fan, a filter component is axially and elastically slidably matched in the air pipe through a spring, and the filter component is elastically close to one end of the air inlet. The filter assembly is assembled in the air pipe in an axial elastic sliding mode, when the filter assembly is blocked by dust, the negative pressure borne by the filter assembly is increased to enable the filter assembly to move axially, the filter assembly is driven to move axially, the filter assembly is driven to move axially, the filter assembly is driven to move axially, the filter assembly is driven to move axially, and the filter assembly is driven to move axially. The filter assembly touches the microswitch to enable the prompt terminal to feed back blockage information, the filter assembly is reminded to be cleaned and maintained in time, and the good ventilation effect is kept.

Description

Technical Field

[0001] The utility model relates to the field of ventilation equipment, in particular to an indoor ventilation device. Background Art

[0002] Ventilation equipment is a necessary facility in factories. The internal and external ventilation methods are adopted to keep a good production and processing environment indoors. The indoor external ventilation equipment is used to discharge the internal air outwards. However, the indoor air often contains a lot of dust, and direct discharge will cause environmental pollution. Installing a filter element at the indoor ventilation part can effectively purify the discharged air. However, the dust will accumulate on the surface of the filter net, causing ventilation blockage. The existing indoor ventilation equipment lacks a dust blockage prompt function. Content of the Utility Model

[0003] The purpose of the utility model is to provide an indoor ventilation device, which is used to solve the problem that the traditional indoor ventilation equipment lacks an autonomous prompt function when the filter element is seriously blocked, and it is difficult to clean in time and maintain a good ventilation effect.

[0004] In order to solve the problems existing in the prior art, the technical solution of the utility model is as follows:

[0005] An indoor ventilation device includes an air duct. One end of the air duct has an air inlet that penetrates the indoor space, and the other end of the air duct has an air outlet connected to a fan. A filter assembly is axially elastically slidably fitted in the air duct. The filter assembly elastically approaches one end of the air inlet. A microswitch is arranged on the inner wall of the air duct near the air outlet end. The filter assembly can touch the microswitch when axially moving, and the microswitch is electrically connected to an external prompt terminal.

[0006] Preferably, the air duct is in a continuously stepped diameter-expanded shape from the air inlet to the air outlet direction, and the axial length of each diameter-expanded part of the air duct gradually increases along the air inlet to the air outlet direction. The filter assembly includes a cylindrical frame, and the cylindrical frame is slidably fitted with the stepped shape of the air duct. The end face with the smallest diameter of the cylindrical frame and each stepped end face are encapsulated with filter nets. When the cylindrical frame moves towards the air outlet direction, the filter nets are sequentially conducted.

[0007] Preferably, the filter nets are fixed to the end face and stepped end face of the cylindrical frame by screws.

[0008] Preferably, an axially extending slideway is formed on the surface of the air duct, a slider is slidably arranged in the slideway, the slider is fixedly connected to the cylindrical frame, and position marks are arranged at the edge of the slideway.

[0009] Preferably, one end of the air duct near the air outlet is in an open shape, and the opening diameter is larger than the maximum diameter of the cylindrical frame. The opening of the air duct is blocked by a back plate fixed by screws, and the air outlet is arranged at the center position of the back plate.

[0010] Preferably, the air outlet is connected to the air inlet end of the fan through a hose.

[0011] Compared with the related art, the utility model has the following beneficial effects:

[0012] 1. The filter component of the utility model is assembled in the air duct in an axially elastic sliding manner. When the filter component is blocked by dust, the negative pressure it receives increases, causing it to move axially. The touch micro switch of the filter component makes the prompt terminal feedback the blockage information, timely reminding to clean and maintain the filter component to maintain a good ventilation effect.

[0013] 2. The utility model forms a multi-stage filtration mode by gradually axially sliding the cylinder frame and conducting the filter screens one by one, extending the maintenance cycle of the filter component. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 is a schematic diagram of the installation structure of the filter component of the utility model.

[0016] Figure 3 is a schematic diagram of the structure of the micro switch aligned with the filter component of the utility model.

[0017] Figure 4 is a schematic diagram of the filter component structure of the utility model;

[0018] Figure 5 is a schematic diagram of the air duct structure of the utility model.

[0019] Reference numerals: 1. Air duct; 11. Air inlet; 12. Air outlet; 13. Hose; 14. Back plate; 2. Filter component; 21. Cylinder frame; 22. Filter screen; 3. Micro switch; 4. Slideway; 41. Slide block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further describes the utility model in detail with reference to the drawings and embodiments.

[0021] As Figure 1 , Figure 2 , Figure 3As shown in the figure, an indoor ventilation device is provided with an air duct 1. Air inlets 11 and air outlets 12 are respectively arranged at both ends of the air duct 1. The air inlet 11 penetrates through the indoor space, and the air outlet 12 is connected to the air inlet end of an external fan. A filter assembly 2 is axially slidably and adaptively installed in the air duct 1. A spring is connected between the filter assembly 2 and the end face of the air duct 1, so that the filter assembly 2 is close to one end of the air inlet 11 under the action of elastic force. A microswitch 3 is installed at one end of the inner wall of the air duct 1 close to the air outlet 12. The microswitch 3 is electrically connected to an external prompt terminal, and the prompt terminal can be a loudspeaker, a prompt lamp, etc.;

[0022] The external fan extracts indoor air and discharges it. The indoor air enters the air duct 1 from the air inlet 11, and the dust in the air is filtered by the filter assembly 2. The filtered air is guided by the air outlet 12 to the fan and discharged. As the dust accumulates, the permeability of the filter assembly 2 gradually decreases, and the negative pressure behind the filter assembly 2 gradually increases, causing the filter assembly 2 to gradually move in the direction of the air outlet 12 against the elastic force until the filter assembly 2 touches the microswitch 3, causing the external prompt terminal to make a corresponding response, prompting the personnel to clean and maintain the filter assembly 2 in time to maintain normal ventilation.

[0023] The air outlet 12 is connected to the air inlet end of the fan through a hose 13, which is convenient for coordinating the installation positions of the air duct 1 and the fan.

[0024] As Figure 2 、 Figure 3 、 Figure 4 As shown in the figure, the air duct 1 is in a continuously stepped and expanded diameter shape from the air inlet 11 to the air outlet 12, and the axial length of each expanded diameter part of the air duct 1 gradually increases along the direction from the air inlet 11 to the air outlet 12. The filter assembly 2 includes a cylindrical frame 21, and the cylindrical frame 21 is slidably and adaptively matched with the stepped shape of the air duct 1. Filter meshes 22 are encapsulated on the end face with the smallest diameter of the cylindrical frame 21 and each stepped end face;

[0025] In the initial stage, since the cylindrical frame 21 is in contact with the inner wall of the air duct 1, only the filter mesh 22 on the end face of the cylindrical frame 21 filters the dust. As the permeability decreases, the cylindrical frame 21 gradually slides axially, and the filter meshes 22 are successively conducted, forming a multi-stage filtering mode, which prolongs the maintenance period of the filter assembly 2.

[0026] The filter meshes 22 are fixed to the end face and the stepped end face of the cylindrical frame 21 by screws, which is convenient for disassembling and replacing the filter meshes 22.

[0027] As Figure 3 As shown in the figure, an axially extending slideway 4 is opened on the surface of the air duct 1. A slider 41 is slidably arranged in the slideway 4, and the slider 41 is fixedly connected to the cylindrical frame 21. Position marks are arranged at the edge of the slideway 4. The slider 41 will move axially along with the cylindrical frame 21. By observing the alignment of the slider 41 with the position marks at the edge of the slideway 4, the position of the filter assembly 2 at this time can be conveniently obtained, and the clogging state of the filter mesh 22 can be judged.

[0028] As Figure 5 shown, one end of the air duct 1 near the air outlet 12 is open, and the opening diameter is larger than the maximum diameter of the cylinder frame 21. The opening of the air duct 1 is blocked by a back plate 14 fixed with screws. The air outlet 12 is arranged at the center of the back plate 14. By removing the back plate 14, the filter assembly 2 can be conveniently taken out from the air duct 1 for cleaning.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An indoor ventilation device, characterized in that: The invention comprises an air duct (1), wherein one end of the air duct (1) has an air inlet (11) penetrating an indoor space, and the other end of the air duct (1) has an air outlet (12) connected to a fan. A filter assembly (2) is provided in the air duct (1) through axial elastic sliding adaptation of a spring, and the filter assembly (2) is elastically close to one end of the air inlet (11). A micro switch (3) is provided on the inner wall of the air duct (1) close to one end of the air outlet (12). The filter assembly (2) can touch the micro switch (3) by axial movement, and the micro switch (3) is electrically connected to an external prompt terminal.

2. The indoor ventilation device according to claim 1, characterized in that: The air duct (1) is in a continuous stepped diameter expansion shape from the air inlet (11) to the air outlet (12), and the axial length of each expanded portion of the air duct (1) gradually increases along the direction from the air inlet (11) to the air outlet (12). The filter assembly (2) comprises a cylinder frame (21), the cylinder frame (21) is slidably adapted to the stepped shape of the air duct (1), the end face of the cylinder frame (21) with the smallest diameter and each stepped end face are encapsulated with filter screens (22), and the cylinder frame (21) moves toward the air outlet (12) to allow the filter screens (22) to be turned on one by one.

3. The indoor ventilation device according to claim 2, characterized in that: The filter screen (22) is fixed to the end surface and the stepped end surface of the cylinder frame (21) by means of screws.

4. The indoor ventilation device according to claim 2, characterized in that: The surface of the air duct (1) is provided with an axially extending slideway (4), a slider (41) is slidably arranged in the slideway (4), the slider (41) is fixedly connected to the cylinder frame (21), and a position mark is arranged on the edge of the slideway (4).

5. The indoor ventilation device according to claim 2, characterized in that: One end of the air duct (1) close to the air outlet (12) is open, and the opening diameter is larger than the maximum diameter of the cylinder frame (21). The opening of the air duct (1) is sealed by a back plate (14) fixed by screws, and the air outlet (12) is arranged at the center of the back plate (14).

6. The indoor ventilation device according to claim 1, characterized in that: The air outlet (12) is connected to the air inlet end of the fan via a hose (13).

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