Smoke exhaust fan with good anti-fatigue structure

Abstract

The utility model discloses a smoke exhaust fan with a good anti-fatigue structure, and relates to the technical field of smoke exhaust fans. The fan comprises a fan shell, an air inlet is formed in one end of the fan shell in a penetrating mode, a rotating block is arranged at the end, close to the air inlet, of the fan shell, a plurality of fixing blocks are fixedly arranged on the surface of the rotating block, fan blades are arranged between every two fixing blocks, and first fixing holes are formed in the fan blades in a penetrating mode. A second fixing hole communicated with the fixing hole is formed in the fixing block; by arranging the rotating block, the fixing block, the fan blades, the first fixing holes, the second fixing holes and the first bolts, traditional point contact between the fan blades and the bolts is changed into surface contact between the fan blades and the fixing plate, the fatigue strength of the joints is reduced by increasing the contact area of the joints of the fan blades, the possibility that the fan blades break at the joints is greatly reduced, and the service life of the fan blades is prolonged. And the safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke exhaust fans, in particular to a smoke exhaust fan with good anti-fatigue structure. Background Art

[0002] The exhaust fan is a machine that can quickly exhaust the odor, high temperature, and oil smoke generated during food processing in the kitchen. The machine is characterized by good high temperature resistance and high efficiency. The types of fans include centrifugal fans, axial flow fans, centrifugal fans, and axial flow fans. Choose a suitable machine according to the size of the space and the layout of the exhaust hood;

[0003] The blades of traditional smoke exhaust fans are mostly connected directly with bolts. There is point contact between the bolts and the blades, and the fatigue strength is relatively large. As a result, the blades are prone to breakage at the bolt position after long-term use, endangering the personal safety of workers. Utility Model Content

[0004] In order to solve the problem that the blades of traditional smoke exhaust fans have high fatigue strength and are easy to break after long-term use, the utility model aims to provide a smoke exhaust fan with good fatigue-resistant structure.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a smoke exhaust fan with good fatigue-resistant structure, comprising a fan casing, an air inlet is formed through one end of the fan casing, a rotating block is arranged at the end of the fan casing close to the air inlet, a plurality of fixed blocks are fixedly arranged on the surface of the rotating block, a fan blade is arranged between two of the fixed blocks, a first fixing hole is formed through the fan blade, a second fixing hole communicating with the fixing hole is formed on the fixed block, and a first bolt is threadedly arranged between the first fixing hole and the second fixing hole.

[0006] Preferably, four equally spaced connecting blocks are fixedly provided on the inner wall of the fan casing at one end away from the fan blades, a motor inner cylinder is fixedly provided at one end of the four connecting blocks away from the fan casing, a motor is fixedly provided in the motor inner cylinder, an output shaft end of the motor is fixedly provided on the rotating block, a positioning block is provided at one end of the motor inner cylinder away from the rotating block, and a second bolt is threadedly provided between the positioning block and the motor inner cylinder.

[0007] Preferably, the surface of the fan housing is penetrated with symmetrically distributed first ventilation holes, the motor inner cylinder is penetrated with symmetrically distributed second ventilation holes, a ventilation pipe is fixedly arranged between the first ventilation hole and the second ventilation hole, and the fan housing is fixedly arranged with symmetrically distributed baffles near the first ventilation hole.

[0008] Preferably, an exhaust port is formed through one end of the fan housing away from the air inlet, and an arc-shaped opening is formed through one end of the fan housing close to the exhaust port, a filter is movably provided in the arc-shaped opening, and a handle is fixedly provided on the filter.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. By setting a rotating block, a fixed block, a fan blade, a first fixing hole, a second fixing hole and a first bolt, the point contact between the traditional fan blade and the bolt is changed into a surface contact between the fan blade and the fixing plate, and the fatigue strength of the connection is reduced by increasing the contact area of ​​the fan blade connection, which greatly reduces the possibility of the fan blade breaking at the connection and increases the safety of the device;

[0011] 2. By providing the motor inner cylinder, the first vent hole, the second vent hole and the vent plate, the interior of the motor inner cylinder can be kept ventilated, the temperature inside the motor inner cylinder can be reduced, and damage to the motor caused by excessively high temperature inside the motor inner cylinder can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0014] Figure 2 This is a schematic diagram of the fan blade structure of the utility model.

[0015] Figure 3 It is a rear view structural schematic diagram of the utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the inner cylinder of the motor of the utility model.

[0017] Figure 5 This is a schematic diagram of the internal structure of the inner cylinder of the motor of the utility model.

[0018] In the figure: 1. fan casing; 11. air inlet; 12. rotating block; 13. fixing block; 14. fan blade; 15. first fixing hole; 16. second fixing hole; 17. first bolt; 2. connecting block; 21. motor inner cylinder; 22. motor; 23. positioning block; 24. second bolt; 3. first vent hole; 31. second vent hole; 32. vent pipe; 33. baffle; 34. exhaust port; 35. arc opening; 36. filter screen; 37. handle; 38. fan foot. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example: Figure 1-5 As shown, the utility model provides a smoke exhaust fan with good fatigue resistance structure, including a fan casing 1, an air inlet 11 is opened through one end of the fan casing 1, a rotating block 12 is arranged at the end of the fan casing 1 close to the air inlet 11, a plurality of fixed blocks 13 are fixedly arranged on the surface of the rotating block 12, a fan blade 14 is arranged between two fixed blocks 13, a first fixing hole 15 is opened through the fan blade 14, a second fixing hole 16 communicating with the fixing hole is opened on the fixing block 13, and a first bolt 17 is threadedly arranged between the first fixing hole 15 and the second fixing hole 16.

[0021] Four equally spaced connection blocks 2 are fixedly arranged on the inner wall of the end of the fan casing 1 away from the fan blades 14, and a motor inner cylinder 21 is fixedly arranged on the end of the four connection blocks 2 away from the fan casing 1, and a motor 22 is fixedly arranged in the motor inner cylinder 21, and the output shaft end of the motor 22 is fixedly arranged on the rotating block 12; because the output shaft end of the motor 22 is fixedly arranged on the rotating block 12, the rotating block 12 can be driven by the motor 22 to rotate, and the rotation of the rotating block 12 can drive the fan blades 14 to rotate.

[0022] A positioning block 23 is provided at the end of the motor inner cylinder 21 away from the rotating block 12, and a second bolt 24 is threadedly provided between the positioning block 23 and the motor inner cylinder 21; if the motor 22 is damaged and needs to be replaced later, the staff can separate the positioning block 23 from the motor inner cylinder 21 through the second bolt 24, thereby opening the end of the motor inner cylinder 21 away from the rotating block 12, making it convenient for the staff to replace the motor 22.

[0023] A symmetrically distributed first ventilation hole 3 is formed through the surface of the fan housing 1, a symmetrically distributed second ventilation hole 31 is formed through the motor inner cylinder 21, and a ventilation pipe 32 is fixedly provided between the first ventilation hole 3 and the second ventilation hole 31; the interior of the motor inner cylinder 21 can be kept ventilated through the first ventilation hole 3, the second ventilation hole 31 and the ventilation pipe 32 to prevent the internal temperature of the motor inner cylinder 21 from being too high and causing damage to the motor 22.

[0024] The fan housing 1 is fixedly provided with symmetrically distributed baffles 33 near the first vent hole 3 ; the baffles 33 can prevent external debris from entering the motor inner cylinder 21 .

[0025] An exhaust port 34 is formed through one end of the fan housing 1 away from the air inlet 11, and an arc-shaped opening 35 is formed through one end of the fan housing 1 close to the exhaust port 34. A filter 36 is movably arranged in the arc-shaped opening 35. Since exhaust motors are widely used in kitchens, the filter 36 can filter the fumes to prevent the exhaust duct from being blocked by excessive impurities.

[0026] A handle 37 is fixedly provided on the filter screen 36 ; the filter screen 36 can be conveniently taken out through the arc-shaped opening 35 by means of the handle 37 .

[0027] Symmetrically distributed fan feet 38 are fixedly arranged below the fan housing 1; the fan feet 38 can increase the stability of the device.

[0028] Working principle: before use, the staff needs to first put the fan blade 14 between two adjacent fixing blocks 13, and make the first fixing hole 15 and the second fixing hole 16 communicate with each other, and then use the first bolt 17 to fix the fixing block 13 and the fan blade 14 through the first fixing hole 15 and the second fixing hole 16. The above method can make the fan blade 14 and the fixing plate 13 in surface contact, which effectively reduces the fatigue strength of the connection between the fan blade 14 and the possibility of the fan blade 14 breaking at the connection. Then start the motor 22. Since the output shaft end of the motor 22 is fixedly set on the rotating block 12, when the motor 22 is running, it will drive the rotating block 12 to rotate. Since the fixed block 13 is fixedly set on the rotating block 12, and the fan blade 14 is set between two adjacent fixed blocks 13, the rotation of the rotating block 12 will drive the fan blade 14 to rotate, thereby generating suction to drive the oil smoke into through the air inlet 11. After the oil smoke passes through the filter 36 to filter the impurities, it will be discharged through the exhaust port 34;

[0029] When the smoke exhaust fan has been used for a long time, the filtering effect of the filter 36 becomes poor due to excessive impurities and the suction of the device becomes smaller. The filter 36 needs to be cleaned. At this time, the staff can use the handle 37 to remove the filter 36 from the arc-shaped opening 35 for cleaning, and reset the filter 36 through the arc-shaped opening 35 after cleaning.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A smoke exhaust fan with good fatigue resistance structure, comprising a fan housing (1), characterized in that: An air inlet (11) is formed through one end of the fan housing (1), a rotating block (12) is arranged at one end of the fan housing (1) close to the air inlet (11), a plurality of fixed blocks (13) are fixedly arranged on the surface of the rotating block (12), a fan blade (14) is arranged between two of the fixed blocks (13), a first fixed hole (15) is formed through the fan blade (14), a second fixed hole (16) communicating with the first fixed hole is formed on the fixed block (13), and a first bolt (17) is threadedly arranged between the first fixed hole (15) and the second fixed hole (16).

2. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 1, characterized in that: Four connection blocks (2) are fixedly arranged on the inner wall of the end of the fan housing (1) away from the fan blades (14), and a motor inner cylinder (21) is fixedly arranged on the end of the four connection blocks (2) away from the fan housing (1). A motor (22) is fixedly arranged in the motor inner cylinder (21), and the end of the output shaft of the motor (22) is fixedly arranged on the rotating block (12).

3. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 2, characterized in that: A positioning block (23) is provided at one end of the motor inner cylinder (21) away from the rotating block (12), and a second bolt (24) is threadedly provided between the positioning block (23) and the motor inner cylinder (21).

4. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 2, characterized in that: The surface of the fan housing (1) is provided with symmetrically distributed first ventilation holes (3), the motor inner cylinder (21) is provided with symmetrically distributed second ventilation holes (31), and a ventilation pipe (32) is fixedly provided between the first ventilation holes (3) and the second ventilation holes (31).

5. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 4, characterized in that: The fan housing (1) is fixedly provided with symmetrically distributed baffles (33) near the first vent hole (3).

6. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 1, characterized in that: An exhaust port (34) is formed through one end of the fan housing (1) away from the air inlet (11), and an arc-shaped opening (35) is formed through one end of the fan housing (1) close to the exhaust port (34), wherein a filter screen (36) is movably arranged in the arc-shaped opening (35).

7. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 6, characterized in that: A handle (37) is fixedly arranged on the filter screen (36).

8. A smoke exhaust fan with good fatigue resistance structure as claimed in claim 1, characterized in that: Symmetrically distributed fan feet (38) are fixedly arranged below the fan housing (1).

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