Roof fan

Abstract

The utility model discloses a roof fan which comprises an air exhaust barrel, a fan cover, a fan cover and a fan cover, a cavity is formed in the air exhaust barrel, and openings are formed in the top and the bottom of the air exhaust barrel; the motor is arranged at the top of the exhaust cylinder; the top end of the transmission shaft is connected with the output end of the motor, and the bottom end of the transmission shaft is inserted into the cavity of the exhaust cylinder; the blades are connected with the bottom end of the transmission shaft; the exhaust hood covers the top of the exhaust cylinder; the control panel is arranged at the bottom opening of the exhaust cylinder, and a plurality of through holes are formed in the control panel; the plurality of supporting seats are fixed on the control panel; the plurality of rotating shafts are arranged on the plurality of supporting seats in a one-to-one correspondence manner; the plurality of shielding covers respectively rotate on the plurality of rotating shafts and cover the plurality of through holes in a one-to-one correspondence manner; and the multiple limiting blocks are arranged on the multiple supporting bases correspondingly. According to the utility model, connection and disconnection of the interior of the exhaust cylinder can be automatically realized without adopting electric power.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field, especially a roof fan. BACKGROUND

[0002] The roof fan is widely applied in many fields such as textile, machinery, ceramics, chemical industry, metallurgy, glass, hardware, leather, electroplating, electronics, shoemaking, printing and dyeing, plastics, clothing making, printing, packaging, food, etc. Especially in industrial plant, due to poor heat dissipation condition, it is extremely hot in summer, which causes low work efficiency and product quality decline. The roof fan can effectively improve indoor air quality, provide comfortable working environment and improve work efficiency.

[0003] The existing roof fan has an electric valve plate arranged in the inside of the exhaust cylinder to control the on-off of the inside of the exhaust cylinder, but the electric control has high cost and needs to solve the circuit connection problem. SUMMARY

[0004] According to the utility model embodiment, a roof fan is provided, which comprises:

[0005] The exhaust cylinder is provided with a cavity in the inside, and the top and bottom of the exhaust cylinder are provided with openings;

[0006] The motor is arranged at the top of the exhaust cylinder;

[0007] The top end of the transmission shaft is connected to the output end of the motor, and the bottom end of the transmission shaft is inserted into the cavity of the exhaust cylinder;

[0008] The blade is connected to the bottom end of the transmission shaft;

[0009] The exhaust cover covers the top of the exhaust cylinder;

[0010] The control disc is arranged at the bottom opening of the exhaust cylinder, and a plurality of through holes are formed in the control disc;

[0011] The plurality of support seats are fixed on the control disc;

[0012] The plurality of rotating shafts are arranged one by one on the plurality of support seats;

[0013] The plurality of shielding covers are respectively rotated on the plurality of rotating shafts, and are one by one arranged on the plurality of through holes;

[0014] The plurality of limiting blocks are respectively arranged on the plurality of support seats, and are one by one corresponding to the positions of the plurality of shielding covers.

[0015] Further, the bottom opening of the exhaust cylinder is provided with an extension along, and the control disc is detachably mounted on the extension along.

[0016] Further, a plurality of through holes are arranged in a multi-layered circular array with the center of the control disc, and the size of the through holes gradually increases from the inner layer to the outer layer.

[0017] Further, the mosquito-proof net is arranged at the top opening of the exhaust cylinder.

[0018] Further, the plurality of supporting seats, the plurality of shielding covers and the plurality of limiting blocks are integrally formed.

[0019] Further, the axial center lines of the control disc, the exhaust cylinder and the transmission shaft are on the same straight line.

[0020] Further, the bottom end of the exhaust cover is lower than the top of the exhaust cylinder.

[0021] Further, the bottom of the exhaust cylinder is provided with a plurality of mounting holes.

[0022] According to the roof fan, power is not used, and the on-off of the exhaust cylinder is automatically realized. The control disc is arranged in the exhaust cylinder, a plurality of through holes are arranged on the control disc, the plurality of shielding covers shield the through holes, when exhaust is needed, the control blades are rotated, air in the exhaust cylinder flows upwards, at this time, the plurality of shielding covers are opened to shield the plurality of through holes, and exhaust is realized; when the device is not used, the plurality of shielding covers are shielded from the gravity of the plurality of shielding covers, the through holes are shielded, and the exhaust of the exhaust cylinder is disconnected.

[0023] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the subject technology. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a three-dimensional structure schematic view of the roof fan according to the embodiment of the utility model.

[0025] Figure 2 It is a front view schematic view of the roof fan according to the embodiment of the utility model.

[0026] Figure 3 It is a structure exploded schematic view of the control disc and the plurality of shielding covers of the roof fan according to the embodiment of the utility model.

[0027] Figure 4 It is a structure schematic view of the control disc and the plurality of shielding covers of the roof fan according to the embodiment of the utility model. DETAILED DESCRIPTION

[0028] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, and the utility model will be further described.

[0029] First, the combination Figures 1-4 A roof fan according to an embodiment of the utility model is described for improving the air in the room, and its application scene is very wide.

[0030] As Figures 1-4 Indicated, a roof fan according to an embodiment of the utility model has a draught tube 100, a motor 200, a transmission shaft 300, a blade 400, a draught cover 500, a control panel 600, a plurality of support bases 700, a plurality of rotating shafts 800, a plurality of shielding covers 901 and a plurality of limiting blocks 902.

[0031] Specifically, as Figures 1-2 Indicated, the inside of the draught tube 100 is provided with a cavity 101, and the top and bottom of the draught tube 100 are provided with openings. The bottom opening is used to be connected with the room, and the top opening is used to be connected with the outside.

[0032] Specifically, as Figure 2 Indicated, the motor 200 is arranged at the top of the draught tube 100; the top end of the transmission shaft 300 is connected with the output end of the motor 200, and the bottom end of the transmission shaft 300 is inserted into the cavity 101 of the draught tube 100; the blade 400 is connected with the bottom end of the transmission shaft 300, and by controlling the movement of the motor 200, the power can be transmitted to the blade 400 through the transmission shaft 300 to drive the blade 400 to rotate.

[0033] Specifically, as Figures 1-2 Indicated, the draught cover 500 covers the top of the draught tube 100 and is used to shield wind and rain.

[0034] Specifically, as Figures 2-4 Indicated, the control panel 600 is arranged at the bottom opening of the draught tube 100, and a plurality of through holes 601 are formed in the control panel 600, and the plurality of through holes 601 are used for draught.

[0035] Specifically, as Figures 2-4 Indicated, a plurality of support bases 700 are fixed on the control panel 600, and a plurality of rotating shafts 800 are correspondingly arranged on the plurality of support bases 700; a plurality of shielding covers 901 are respectively arranged on the plurality of rotating shafts 800, and are correspondingly arranged on the plurality of through holes 601, and are used to shield the plurality of through holes 601 when the draught is not needed.

[0036] Specifically, as Figures 2-4 Indicated, a plurality of limiting blocks 902 are arranged on the plurality of support bases 700 and correspond to the positions of the plurality of shielding covers 901, and are used to limit the plurality of shielding covers 901, so that the angle of rotation of the plurality of shielding covers 901 around the rotating shaft 800 does not exceed 90°, and when the blade 400 does not rotate, the plurality of shielding covers 901 are subjected to the action of their own gravity and can rotate around the rotating shaft 800 to shield the plurality of through holes 601.

[0037] Further, as shown in Figure 2 The bottom opening of the air exhaust cylinder 100 is provided with an extension edge 903, and the control panel 600 is detachably mounted on the extension edge 903.

[0038] Further, as shown in Figure 3 The plurality of through holes 601 are arranged in a plurality of layers of circular arrays with the center of the control panel 600, and the size of the through holes 601 gradually increases from the inner layer to the outer layer, so as to ensure sufficient air exhaust capacity.

[0039] Further, as shown in Figure 2 The utility model discloses a roof fan further includes: mosquito net 903, mosquito net 903 sets up at the top opening of air exhaust cylinder 100, thereby can effectively prevent the mosquito from entering into air exhaust cylinder 100.

[0040] Further, in the embodiment, the plurality of support seats 700, the plurality of shielding covers 901 and the plurality of limiting blocks 902 are integrally formed, which improves the strength and ensures the reliability of the structure.

[0041] Further, as shown in Figure 2 In the embodiment, the axial center lines of the control panel 600, the air exhaust cylinder 100 and the transmission shaft 300 are on the same straight line.

[0042] Further, as shown in Figure 2 The bottom end of the air exhaust cover 500 is lower than the top of the air exhaust cylinder 100, which can effectively prevent rain and snow from entering the air exhaust cylinder 100.

[0043] Further, as shown in Figure 2 The bottom outside of the air exhaust cylinder 100 is provided with a plurality of mounting holes 103 for mounting the air exhaust cylinder 100 and the roof.

[0044] Working principle:

[0045] When air exhaust is needed, the control motor 200 moves, and the transmission shaft 300 transmits power to the blade 400 to drive the blade 400 to rotate, at this time, the airflow in the air exhaust cylinder 100 flows upward, the plurality of shielding covers 901 rotate around the corresponding rotating shaft 800 to open, and the plurality of through holes 601 are not covered, so as to realize air exhaust.

[0046] When air exhaust is not needed, the plurality of shielding covers 901 rotate around the corresponding rotating shaft 800 to close under the action of their own gravity, and the plurality of through holes 601 are covered, so as to realize the air exhaust of the air exhaust cylinder 100.

[0047] It should be noted that in the present specification, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the elements defined by the phrase "comprising" do not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0048] Although the content of the present application has been described in detail by the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present application. After reading the above content, various modifications and alternatives of the present application will be apparent to those skilled in the art. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. A roof ventilator characterized by, The utility model relates to a mosquito killer, which comprises: an exhaust cylinder with a cavity inside, an opening at the top and an opening at the bottom; a motor arranged at the top of the exhaust cylinder; a transmission shaft with its top end connected to the output end of the motor and its bottom end inserted into the cavity of the exhaust cylinder; a blade connected to the bottom end of the transmission shaft; an exhaust cover covering the top of the exhaust cylinder; a control disc arranged at the bottom opening of the exhaust cylinder, with a plurality of through holes formed therein; a plurality of support seats fixed on the control disc; a plurality of rotating shafts arranged one-to-one on the plurality of support seats; a plurality of cover lids respectively rotating on the plurality of rotating shafts and one-to-one covering the plurality of through holes; a plurality of limiting blocks respectively arranged on the plurality of support seats and one-to-one corresponding to the positions of the plurality of cover lids.

2. The roof fan of claim 1, wherein The bottom opening of the exhaust cylinder is provided with an extension along which the control disc is detachably mounted.

3. The roof ventilator of claim 1 wherein, The plurality of through holes are arranged in a multi-layer circular array with the center of the control disc, and the size of the through holes gradually increases from the inner layer to the outer layer.

4. The roof ventilator of claim 1 wherein, The utility model further comprises a mosquito-proof net arranged at the top opening of the exhaust cylinder.

5. The roof ventilator of claim 1 wherein, The plurality of support seats, cover lids and limiting blocks are integrally formed.

6. The roof ventilator of claim 1 wherein, The axial center lines of the control disc, the exhaust cylinder and the transmission shaft are on the same straight line.

7. The roof ventilator of claim 1 wherein, The bottom end of the exhaust cover is lower than the top of the exhaust cylinder.

8. The roof ventilator of claim 1 wherein, The bottom of the exhaust cylinder is provided with a plurality of mounting holes.

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