Roof fan with improved rainproof cap structure

Abstract

The utility model discloses a roof fan with an improved rainproof cap structure, which comprises an air duct, a rainproof cap is fixed at the upper end of the air duct, the rainproof cap comprises a hemispherical top, a middle platform, a cylinder and two rows of ventilation slots which are integrally formed, each row of ventilation slots is provided with a lifting shielding part, each lifting shielding part comprises a lifting block, a plurality of spherical arc-shaped plates are fixed on the lifting blocks, and the spherical arc-shaped plates are fixed on the lifting blocks. The spherical arc-shaped plate is inserted into the ventilation groove in a sleeved mode, and two supporting guide pipes are fixed to the bottom of the lifting block and inserted into the middle platform in a sleeved mode. According to the utility model, the lifting shielding part can be lifted in rainy days, the ventilation resistance of the fan can be effectively reduced, the lifting shielding part can be moved downwards in rainy days, rainwater can be effectively prevented from entering the fan, and the practicability of the fan can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a roof fan with an improved rainproof cap structure. Background Art

[0002] In addition to the fan body, the roof fans currently on the market also have a rain cap on the top. In order to prevent rain and snow from drifting into the house through the roof fan on rainy and snowy days, the rain cap is usually pressed very low. Although this can prevent rain and snow from entering, the rain cap is not needed on sunny or cloudy days and creates a lot of resistance to the fan itself, thus reducing the practicality of the fan. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a roof fan with an improved rain cap structure, which can raise the lifting shielding part in rainless weather to effectively reduce the ventilation resistance of the fan, and can move the lifting shielding part downward in rainy weather to effectively prevent rainwater from entering the inside of the fan, thereby effectively improving the practicability of the fan.

[0004] The solution of the utility model to solve the technical problem is:

[0005] A roof fan with an improved rain cap structure comprises a wind tube, a motor is fixed in the wind tube, an impeller is fixed on the motor shaft of the motor, a rain cap is fixed on the upper end of the wind tube, the rain cap comprises an integrally formed hemispherical top, an intermediate platform, a cylinder and two rows of ventilation slots penetrating the upper ends of the hemispherical top and the cylinder, each row of ventilation slots is provided with a lifting shielding part, the lifting shielding part comprises a lifting block, a plurality of spherical arc plates arranged in the front and rear directions are fixed on the lifting block, the spherical arc plates cooperate with the ventilation slots, two support guide tubes are fixed on the bottom of the lifting block, the support guide tubes pass through the intermediate platform, ... intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the intermediate platform, the The protruding end of the guide hole on the intermediate platform is formed with a convex ring, which is pressed against the lower bottom surface of the intermediate platform; a compression spring is sleeved in the support guide tube, and the two ends of the compression spring are clamped between the lower bottom surface of the intermediate platform and the spring support plate, and the spring support plate is fixed on the outer wall of the wind tube; a connecting strip is fixedly connected between the two support guide tubes of the same lifting and lowering shielding part, and a sleeve hole is formed in the middle of the connecting strip. A nut is provided on the lower side of the inner end of the sleeve hole, and the nut is fixed on the outer wall of the wind tube. A screw is threaded on the nut, and the screw is located directly below the sleeve hole, and the screw can be inserted into the sleeve hole.

[0006] The intermediate platform is formed with a sink that matches the lifting block.

[0007] The distance L1 between the lower bottom surface of the lifting block and the sink groove is equal to the center distance L2 between the sleeve hole and the corresponding screw.

[0008] The upper surface of the middle platform is arranged to be lower on the outside and higher on the inside;

[0009] The upper surface of the lifting block is arranged to be low on the outside and high on the inside.

[0010] A ventilation duct is left between the upper outer wall of the wind tube and the inner wall of the cylinder;

[0011] The outer end of the wind tube is fixedly connected to the cylinder via a plurality of connecting columns.

[0012] The outstanding effect of the utility model is that compared with the prior art, the lifting shielding part can be raised in rainless weather to effectively reduce the ventilation resistance of the fan, and the lifting shielding part can be moved down in rainy weather to effectively prevent rainwater from entering the inside of the fan, which can effectively improve the practicability of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 for Figure 2 A partial enlarged view of A;

[0016] Figure 4 It is a top view of the utility model;

[0017] Figure 5 for Figure 4 About the cross-sectional view of BB;

[0018] Figure 6 It is a structural schematic diagram of the lifting shielding part of the utility model;

[0019] Figure 7 It is a structural schematic diagram of the rainproof hat of the utility model. DETAILED DESCRIPTION

[0020] For example, see Figures 1 to 7As shown, a roof fan with an improved rain cap structure includes a wind tube 11, a motor 12 is fixed in the wind tube 11, an impeller 13 is fixed on the motor shaft of the motor 12, a rain cap 2 is fixed on the upper end of the wind tube 11, and the rain cap 2 includes an integrally formed hemispherical top 21, an intermediate platform 22, a cylinder 23 and two rows of ventilation slots 24 penetrating the upper ends of the hemispherical top 21 and the cylinder 23, each row of ventilation slots 24 is provided with a lifting shielding part 3, and the lifting shielding part 3 includes a lifting block 31, a plurality of spherical arc plates 32 arranged in the front and rear directions are fixed on the lifting block 31, and the spherical arc plates 32 cooperate with the ventilation slots 24, and two support guide tubes 33 are fixed at the bottom of the lifting block 31, and the support guide tubes 33 pass through the intermediate platform The protruding end of the guide hole 221 on 22 is formed with a convex ring 34, and the convex ring 34 is pressed against the lower bottom surface of the middle platform 22; a compression spring 41 is sleeved in the support guide tube 33, and the two ends of the compression spring 41 are clamped between the lower bottom surface of the middle platform 22 and the spring support plate 42, and the spring support plate 42 is fixed on the outer wall of the wind tube 11; a connecting strip 36 is fixedly connected between the two support guide tubes 33 of the same lifting shielding part 3, and a sleeve hole 35 is formed in the middle of the connecting strip 36, and a nut 43 is provided on the lower side of the inner end of the sleeve hole 35, and the nut 43 is fixed on the outer wall of the wind tube 11, and a screw 44 is threaded on the nut 43, and the screw 44 is located directly below the sleeve hole 35, and the screw 44 can be inserted into the sleeve hole 35.

[0021] Furthermore, a sink 222 that matches the lifting block 31 is formed on the middle platform 22 .

[0022] Specifically, the distance L1 between the bottom surface of the lifting block 31 and the sink 222 is equal to the center distance L2 between the sleeve hole 35 and the corresponding screw 44 .

[0023] Furthermore, the upper surface of the intermediate platform 22 is arranged to be low on the outside and high on the inside;

[0024] The upper surface of the lifting block 31 is arranged to be low outside and high inside.

[0025] Furthermore, a ventilation duct 100 is provided between the upper outer wall of the wind tube 11 and the inner wall of the cylinder 23;

[0026] The outer end of the wind tube 11 is fixedly connected to the cylinder 23 via a plurality of connecting columns 14 .

[0027] Working principle: the motor 12 drives the impeller 13 to rotate, and the impeller 13 transports the air upward, and the air can be discharged outward through the ventilation groove 24 and the ventilation duct 100; when it rains, unscrew the screw 44, and then press the lifting shielding part 3 down, insert the spherical arc plate 32 into the ventilation groove 24, and when the lower bottom surface of the lifting block 31 is pressed against the bottom surface of the sinking groove 222, insert the screw 44 into the through hole 35 and screw it on the corresponding nut 43, so as to fix the lifting shielding part 3 to the rainproof cap 2; at this time, the outer surface formed by the hemispherical top 21 and the spherical arc plate 32 is a spherical arc surface, and the upper plane of the middle platform and the lifting block is tilted low on the outside and high on the inside, which is convenient for rainwater to slide down and can effectively prevent rainwater accumulation.

[0028] Finally, the above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The scope of patent protection of the present invention should be limited by the claims.

Claims

1. A roof fan with an improved rain cap structure, comprising a wind tube (11), a motor (12) fixed inside the wind tube (11), an impeller (13) fixed on the motor shaft of the motor (12), characterized in that: A rain cap (2) is fixed to the upper end of the wind tube (11), and the rain cap (2) comprises an integrally formed hemispherical top (21), an intermediate platform (22), a cylinder (23), and two rows of ventilation slots (24) penetrating the upper ends of the hemispherical top (21) and the cylinder (23), each row of ventilation slots (24) being provided with a lifting shielding portion (3), and the lifting shielding portion (3) comprising a lifting block (31), a plurality of spherical arc plates (32) arranged in a front-to-back direction being fixed to the lifting block (31), the spherical arc plates (32) being matched with the ventilation slots (24), and two supporting guide tubes (33) being fixed to the bottom of the lifting block (31), and a convex ring (34) being formed at the protruding end of the supporting guide tube (33) passing through the guide hole (221) on the intermediate platform (22), and the convex ring (34) is pressed The support guide tube (33) is supported against the lower bottom surface of the middle platform (22); a compression spring (41) is sleeved inside the support guide tube (33); two ends of the compression spring (41) are clamped between the lower bottom surface of the middle platform (22) and a spring support plate (42); the spring support plate (42) is fixed on the outer wall of the wind tube (11); a connecting strip (36) is fixedly connected between the two support guide tubes (33) of the same lifting shielding part (3); a sleeve hole (35) is formed in the middle of the connecting strip (36); a nut (43) is provided at the lower side of the inner end of the sleeve hole (35); the nut (43) is fixed on the outer wall of the wind tube (11); a screw (44) is threaded on the nut (43); the screw (44) is located directly below the sleeve hole (35); the screw (44) can be inserted into the sleeve hole (35).

2. A roof fan with an improved rain cap structure according to claim 1, characterized in that: A sink groove (222) matching with the lifting block (31) is formed on the middle platform (22).

3. A roof fan with an improved rain cap structure according to claim 2, characterized in that: The distance L1 between the lower bottom surface of the lifting block (31) and the sink groove (222) is equal to the center distance L2 between the sleeve hole (35) and the corresponding screw (44).

4. A roof fan with an improved rain cap structure according to claim 1, characterized in that: The upper surface of the intermediate platform (22) is arranged to be lower on the outside and higher on the inside; The upper surface of the lifting block (31) is arranged to be lower on the outside and higher on the inside.

5. A roof fan with an improved rain cap structure according to claim 1, characterized in that: A ventilation duct (100) is provided between the upper outer wall of the wind tube (11) and the inner wall of the cylinder (23); The outer end of the wind tube (11) is fixedly connected to the cylinder (23) via a plurality of connecting columns (14).

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