Novel filter screen structure for fresh air ventilator

Abstract

The utility model relates to the technical field of fresh air machines, in particular to a novel filter screen structure for a fresh air machine. The device mainly aims at solving the problems that filter screens installed on an inlet and an outlet of a common machine body are difficult to disassemble and assemble at the same time, limiting of the filter screens can be relieved only by disassembling and assembling a plurality of screws one by one in advance in the disassembling and assembling process in a screw assembling mode, and the disassembling and assembling efficiency is reduced due to one-by-one disassembling and assembling. According to the technical scheme, the fresh air ventilator comprises a fresh air ventilator body, a protective cover is arranged at the top of the fresh air ventilator body, and dustproof nets facilitating protection of an inlet and an outlet of the fresh air ventilator body are symmetrically installed on the two side wall bodies of the protective cover. The dustproof net can be quickly disassembled and assembled at the same time, work assistance is not needed, the disassembling and assembling speed is increased, and workers can conveniently check and maintain the device.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air fans, and in particular to a novel filter screen structure for fresh air fans. Background Art

[0002] A fresh air fan is a device used to regulate indoor air quality. Its main function is to introduce fresh outdoor air into the room to achieve indoor and outdoor air exchange and circulation. It can effectively remove indoor pollutants, regulate indoor humidity and temperature, improve indoor air quality, and ensure people's health and comfort. The function of a new fresh air fan is similar to that of a traditional fresh air fan. The inlet and outlet of a new fresh air fan usually use screws to fix the filter screen, so that the inlet and outlet are set with the filter screen to prevent dust from entering the body and affecting the internal structure.

[0003] However, the filters installed on the common inlet and outlet of the machine body are difficult to disassemble and assemble at the same time, and under the screw installation method, multiple screws need to be disassembled and assembled one by one in advance during the disassembly and assembly process to release the limit on the filter. Since the disassembly and assembly are performed one by one, the disassembly and assembly efficiency is reduced, and the auxiliary adapter tools are required. In view of this, we propose a new filter structure for fresh air fans. Utility Model Content

[0004] The purpose of the utility model is to propose a novel filter screen structure for a fresh air fan in view of the problems existing in the background technology.

[0005] The technical solution of the utility model: a new filter structure for a fresh air fan, comprising a fresh air fan body, a protective cover is arranged at the top of the fresh air fan body, and dustproof nets for protecting the inlet and outlet of the fresh air fan body are symmetrically installed on both side walls of the protective cover, and guide rails for assisting the protective cover to be disassembled and assembled are symmetrically arranged on both side walls of the fresh air fan body, a groove is opened on the inner surface wall of the bottom of the protective cover, a limiting assembly for limiting the position of the protective cover is installed in the groove, a driving structure for driving the limiting assembly to move is arranged on the protective cover, and positioning blocks for cooperating with the limiting assembly to limit the position of the protective cover are symmetrically installed on the top wall of the fresh air fan body.

[0006] Preferably, a limit slot is provided on the wall of the guide rail, and the walls on both sides of the protective cover are respectively arranged in the limit slots corresponding to the positions.

[0007] Preferably, ventilation holes are symmetrically provided on the two side walls of the protective cover, and the two dustproof nets are respectively installed in the ventilation holes at corresponding positions.

[0008] Preferably, the limiting assembly comprises a tooth plate, and guide strips are symmetrically welded on the front wall and the back wall of the tooth plate.

[0009] Preferably, first sliding grooves are symmetrically provided on the inner surface of the front view and the inner surface of the back of the groove, and the guide strip is arranged in the first sliding grooves corresponding to the positions.

[0010] Preferably, the two positioning blocks are respectively provided with limiting openings, and the positions of the two limiting openings are staggered.

[0011] Preferably, the driving structure comprises a T-shaped shaft, a protective sleeve and a gear are sleeved on the outer ring surface of the T-shaped shaft, a torsion spring is arranged in the protective sleeve, and one end of the T-shaped shaft is connected to a bearing seat.

[0012] Compared with the prior art, the utility model has the following beneficial technical effects:

[0013] The utility model drives the gear to rotate by twisting the T-axis, so that the gear can drive the two groups of limit components to move in the opposite direction, so that the two groups of limit components are moved out of the two limit openings, thereby releasing the limit on the protective cover, and realizing the purpose of quick disassembly and assembly of the dustproof net without tools, which is beneficial for the staff to inspect and maintain the inlet and outlet of the fresh air fan body. When the limit component is inserted between the two, the twisted T-axis is loosened, so that the torsion spring can cooperate with the protective sleeve to drive the T-axis to reset, thereby driving the two groups of limit components to be inserted into the limit openings corresponding to the position, achieving the purpose of limiting the protective cover and completing the installation of the dustproof net, which is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front view cross-sectional structure of a new type of filter structure for fresh air fans;

[0015] Figure 2 yes Figure 1 A schematic diagram of a partial three-dimensional structure of the middle limit assembly;

[0016] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the middle drive structure.

[0017] Figure numerals: 1. Fresh air fan body; 2. Protective cover; 3. Dust screen; 4. Guide rail; 5.; 6. Limiting assembly; 61. Tooth plate; 62. Guide bar; 7. Driving structure; 71. T-shaft; 72. Protective sleeve; 73. Torsion spring; 74. Gear; 75. Bearing seat; 8. Positioning block. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments. Example

[0019] like Figure 1-3As shown, the utility model proposes a new filter structure for a fresh air fan, including a fresh air fan body 1, a protective cover 2 arranged on the fresh air fan body 1, two dustproof nets 3 symmetrically installed in the ventilating openings symmetrically opened on the two side walls of the protective cover 2, and the inlet and outlet of the fresh air fan body 1 are blocked by the dustproof nets 3, thereby preventing external dust from entering the fresh air fan body 1 and affecting the operation of its internal structure; four guide rails 4 are evenly grouped, and two groups of guide rails 4 are symmetrically installed on the two side walls of the fresh air fan body 1, and the two guide rails 4 of each group are symmetrically arranged in the same direction, and the limit slots opened on the wall of the two guide rails 4 of each group are in corresponding positions, and the two side walls of the protective cover 2 are respectively arranged in the limit slots corresponding in position, thereby achieving the purpose of supporting and limiting the protective cover 2, which is beneficial to preventing the protective cover 2 from moving and reducing the dustproof effect of the dustproof net 3.

[0020] Furthermore, a groove is provided on the inner wall of the bottom of the protective cover 2, and a limiting assembly 6 is installed in the groove to facilitate limiting the protective cover 2. The limiting assembly 6 includes a tooth plate 61, and the tooth surfaces of the two tooth plates 61 of the two groups of limiting assemblies 6 are arranged in a corresponding state. Two guide strips 62 are symmetrically welded on the front wall and the back wall of the tooth plate 61, and are arranged in the first slide groove provided on the front inner wall and the back inner wall of the groove. The tooth plate 61 is limited by the first slide groove in cooperation with the two guide strips 62, which is also conducive to guiding the tooth plate 61 in the moving state. Towards; the two tooth plates 61 are staggered, and the two positioning blocks 8 are symmetrically installed on the top wall of the fresh air fan body 1 and are located in the groove. The limit openings opened on the two positioning blocks 8 are staggered, and the positions correspond to the positions of the two tooth plates 61 included in the two sets of limit assemblies 6. When the tooth plate 61 moves to the limit opening, the positioning block 8 can cooperate with the tooth plate 61 to prevent the protective cover 2 from separating from the fresh air fan body 1, thereby achieving the purpose of positioning the dustproof net 3; second slide grooves are symmetrically opened on the inner walls of the two limit openings, and the second slide grooves correspond to and are connected with the first slide grooves, which facilitates the movement of the auxiliary tooth plate 61.

[0021] Furthermore, a driving structure 7 is arranged on the protective cover 2 to facilitate the movement of the limit assembly 6. The driving structure 7 includes a T-shaped shaft 71. A rotating hole is opened on the back wall of the protective cover 2, and the rotating hole is connected to the groove. The bearing seat 75 is installed on the inner wall of the groove. One end of the T-shaped shaft 71 passes through the rotating hole and is connected to the rotating end of the bearing seat 75. The setting of the bearing seat 75 is conducive to assisting the rotation of the T-shaped shaft 71; the protective sleeve 72 and the gear 74 are fixedly sleeved on the outer ring surface wall of the T-shaped shaft 71, and the gear 74 is connected to the teeth at the opposite wall of the two tooth plates 61, so that the T-shaped shaft 71 rotates clockwise. The two tooth plates 61 can be driven by the gear 74 to move in the same direction or in the opposite direction, so that the tooth plate 61 is inserted into the limit opening corresponding to the position to complete the positioning, or is disengaged from the limit opening and contacts the limit, which is convenient for quick disassembly and assembly of the dustproof net 3 and achieves the purpose of simultaneous disassembly and assembly, saving disassembly and assembly time, and no additional work assistance is required, which provides convenience for subsequent maintenance and cleaning work; the torsion spring 73 is arranged in the protective sleeve 72, and the torsion spring 73 can be protected by the protective sleeve 72. The top end of the torsion spring 73 is connected to the top inner wall of the T-shaped shaft 71, and the bottom end is fixedly connected to the back wall of the protective cover 2, which is convenient for driving the T-shaped shaft 71 to reset.

[0022] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A novel filter screen structure for a fresh air blower, comprising a fresh air blower body (1), characterized in that: A protective cover (2) is arranged at the top of the fresh air fan body (1), and dust screens (3) are symmetrically installed on the two side walls of the protective cover (2) for protecting the inlet and outlet of the fresh air fan body (1). Guide rails (4) are symmetrically installed on the two side walls of the fresh air fan body (1) for assisting the protective cover (2) to be disassembled and assembled. A groove is provided on the inner surface wall of the bottom of the protective cover (2), and a limit assembly (6) is installed in the groove for limiting the position of the protective cover (2). A driving structure (7) is arranged on the protective cover (2) for driving the limit assembly (6) to move. Positioning blocks (8) are symmetrically installed on the top wall of the fresh air fan body (1) for cooperating with the limit assembly (6) to limit the position of the protective cover (2).

2. A novel filter structure for fresh air blower according to claim 1, characterized in that: A limit slot is provided on the wall of the guide rail (4), and the walls on both sides of the protective cover (2) are respectively arranged in the limit slots corresponding to the positions.

3. A novel filter structure for fresh air blower according to claim 1, characterized in that: Ventilation holes are symmetrically provided on the two side walls of the protective cover (2), and the two dustproof nets (3) are respectively installed in the ventilation holes at corresponding positions.

4. A novel filter structure for fresh air blower according to claim 1, characterized in that: The limiting assembly (6) comprises a tooth plate (61), and guide strips (62) are symmetrically welded on the front wall and the back wall of the tooth plate (61).

5. A novel filter structure for fresh air blower according to claim 4, characterized in that: A first slide groove is symmetrically provided on the inner surface of the front view of the groove and the inner surface of the back side, and the guide strip (62) is arranged in the first slide groove at a corresponding position.

6. A novel filter structure for fresh air blower according to claim 1, characterized in that: The two positioning blocks (8) are respectively provided with limiting openings, and the positions of the two limiting openings are staggered.

7. A novel filter structure for fresh air blower according to claim 1, characterized in that: The driving structure (7) comprises a T-shaped shaft (71), a protective sleeve (72) and a gear (74) being sleeved on the outer ring surface of the T-shaped shaft (71), a torsion spring (73) being arranged in the protective sleeve (72), and one end of the T-shaped shaft (71) being connected to a bearing seat (75).

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