Kitchen fan

Abstract

The utility model provides a kind of kitchen fan, including base, base is fixedly connected with protective cover, protective cover upper portion is provided with upper cover, upper cover lower portion is provided with motor guard plate, motor guard plate is hollow cylinder structure, motor guard plate lower portion is provided with motor fixed plate, wiring box and motor are arranged on motor fixed plate, motor lower portion is connected with impeller, impeller lower portion is provided with air inlet tube, the lower edge of air inlet tube is fixed on the air guide ring of base, it is characterized in that in upper cover optionally set cap, cap and protective cover upper end leave passage, after the air in house is inhaled into impeller, it is along protective cover and rises, diffuses to kitchen fan outside by the passage between protective cover and upper cover.The utility model guarantees the waterproofness, drainage timeliness and anti-snow function of kitchen fan, not only effectively prevent moisture from entering house, avoid moisture infiltration circuit system, also can effectively prevent ice and snow from entering fan protective cover and form accumulation phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of roof ventilator equipment, and specifically relates to a kitchen ventilator. Background Technology

[0002] A kitchen fan is an exhaust system installed on the roof to remove exhaust gases produced by the stove during combustion, as well as harmful fumes and polluted air generated during cooking, ensuring clean indoor air.

[0003] Traditional kitchen fans have unobstructed upward-facing air outlets, allowing airflow to escape upwards. In heavy rain, strong winds, or snow, the exhaust resistance at the outlet increases due to the influx of rain, snow, or strong winds. This can lead to airflow and rainwater backflow, as well as ice and snow accumulation. Not only can this result in ice and snow buildup, reduced exhaust efficiency, and water ingress into the room, but it can also cause corrosion and damage to the internal components of the machine, which is detrimental to the long-term use of the kitchen fan. Utility Model Content

[0004] The purpose of this utility model is to provide a kitchen fan that solves problems such as snow and ice accumulation at the air outlet due to weather conditions, increased exhaust resistance, reduced exhaust efficiency, and internal corrosion and damage to the kitchen fan.

[0005] This utility model provides a kitchen fan, including a base, a protective cover fixedly connected to the base, an upper cover above the protective cover, a motor guard plate below the upper cover, the motor guard plate having a hollow cylindrical structure, a motor fixing plate below the motor guard plate, a drive motor mounted on the motor fixing plate, the drive motor being connected and fixed to an impeller via a motor shaft, an air inlet duct below the impeller, the lower edge of the air inlet duct being fixed to the air guide ring of the base, an air inlet opening on the base corresponding to the air inlet duct, a first air outlet channel being provided between the protective cover and the motor guard plate, and a cap optionally provided on the outer edge of the upper cover, with a second air outlet channel being provided between the cap and the upper end of the protective cover.

[0006] Furthermore, the cap is provided with several vertical cap brackets. The upper end of the cap bracket is fixedly connected to the cap, and the lower end extends into the protective cover. A nut is provided at the lower end of the bracket, and the protective cover is provided with a corresponding mounting hole at the nut. The lower end nut and mounting hole of the cap bracket are fixedly connected by bolts.

[0007] Furthermore, the upper end of the cap is provided with a vertical edge, the inner diameter of which matches the outer diameter of the cover. The diameter of the cap gradually increases from the upper edge downwards, forming a spherical arc shape. The diameter of the lower end of the cap is greater than the diameter of the upper end of the protective cover. The distance between the upper end of the outer wall of the protective cover and the outer end of the inner wall of the cap is between 50 and 200 mm.

[0008] Furthermore, the base is a hollow stepped structure with a base platform at the bottom. The base platform has a boss protruding upwards, and a circular through hole is provided on the upper surface of the boss. An air guide ring is fixedly provided around the circular through hole. The protective cover is connected to the boss, and a sealing ring or sealing gasket is provided at the connection.

[0009] Furthermore, the base and the air guide ring are integrally formed, and the outer end of the air guide ring is sealed to the inner end of the air inlet.

[0010] Furthermore, the diameter of the protective cover gradually decreases from top to bottom in a streamlined shape. The lower end of the protective cover, the upper surface of the base, the horn-shaped air guide ring, and the vertically upward air inlet form a water tank. A drain outlet is provided at the lower end of the protective cover, with one end of the drain outlet located at the lower end of the protective cover and the other end extending downward at an angle to the outside of the frame of the base.

[0011] Furthermore, a circular ring is provided between the protective cover and the air guide ring. The protective cover, the circular ring, and the air guide ring are integrally formed structures, and the circular ring is fixedly connected to the base.

[0012] Furthermore, a conduit is provided on one side of the protective cover. The conduit passes through the motor guard plate and the protective cover and extends to the outside of the protective cover. The conduit slopes downward from the inside to the outside. A protective coil is provided on the outer end face of the conduit. A waterproof connector is provided at the end of the conduit that connects to the motor guard plate. A second sealing ring and a third sealing ring are respectively provided at the junction of the conduit, the motor guard plate, and the protective cover. The second sealing ring seals the gap between the conduit and the motor guard plate, and the third sealing ring seals the gap between the conduit and the protective cover.

[0013] Furthermore, a first sealing ring is provided at the junction of the motor guard plate and the horizontally arranged motor fixing plate. The height of the motor fixing plate is higher than the lower end of the motor guard plate. The first sealing ring is sleeved on the lower end of the motor guard plate, and the inner sidewall of the first sealing ring is in contact with the motor fixing plate.

[0014] Furthermore, the drive motor includes a junction box and a motor. The motor power cord is electrically connected to the terminal block inside the junction box. Both the motor and the junction box are fixed on the motor mounting plate. The bottom of the junction box is provided with two side ears, which are fixedly connected to the motor mounting plate, supporting the bottom surface of the junction box on the motor mounting plate.

[0015] This utility model discloses a kitchen fan that, by selectively adding caps to the edge of the top cover, effectively reduces the entry of rain, snow, or strong winds, alleviating the problems of increased exhaust resistance and rain / snow backflow caused by weather conditions. The base can be optionally configured as a hollow, stepped structure, effectively preventing rainwater from entering through the connection surface between the base and the protective cover. This utility model ensures the kitchen fan's waterproofness, timely drainage, and snow-proof function, effectively preventing moisture from entering the house and seeping into the electrical system, as well as effectively preventing ice and snow from entering the fan's protective cover and accumulating. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the capless version of this utility model.

[0017] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 3 This is a partial exploded view of this utility model.

[0019] Figure 4 This is a schematic diagram of the cap of this utility model.

[0020] Figure 5 This is a partial sectional view of the present invention.

[0021] Figure 6 This is a utility model Figure 5 A magnified view of part A.

[0022] Figure 7 This is a schematic diagram of the base and air guide ring of this utility model.

[0023] Figure 8 This is a cross-sectional view of the protective cover and air guide ring of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Base, 2. Protective cover, 3. Drain outlet, 4. Top cover, 5. Cap, 6. Motor guard plate, 7. Motor mounting plate, 8. Conduit, 9. Junction box, 10. Motor, 11. Impeller, 12. Air inlet, 13. Air guide ring, 14. Ring, 101. Base platform, 102. Boss, 201. Mounting hole, 501. Cap bracket, 601. First sealing ring, 602. Second support member, 701. First support member, 801. Second sealing ring, 802. Third sealing ring, 803. Waterproof connector. Detailed Implementation

[0025] To better understand the purpose, structure, and function of this utility model, a kitchen fan of this utility model will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described are only for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not the entire structure.

[0026] like Figures 1 to 6 As shown, this utility model discloses a kitchen fan including a base 1, a protective cover 2 fixedly connected to the base 1, an upper cover 4 above the protective cover 2, a motor guard plate 6 below the upper cover 4, the motor guard plate 6 being a hollow cylindrical structure, a motor fixing plate 7 below the motor guard plate 6, and a drive motor 10 mounted on the motor fixing plate 7. The drive motor 10 includes terminals in a junction box 9 electrically connected to the motor. An impeller 11 is connected below the motor, and an air inlet duct 12 is located below the impeller 11. The lower edge of the air inlet duct 12 is fixed to an air guide ring 13, which is positioned between the air inlet duct 12 and the base 1. An air inlet is provided on the base 1 corresponding to the air inlet duct 12, and a first air outlet channel is provided between the protective cover 2 and the motor guard plate 6. When the kitchen fan is turned on, the drive motor 10 starts to rotate, driving the impeller 11 to rotate. The air in the room is drawn into the impeller 11 through the air inlet of the base 1, the air guide ring 13 and the air inlet tube 12, and then escapes. It rises along the protective cover 2 and diffuses to the outside of the kitchen fan through the first channel between the protective cover 2 and the motor guard plate 6.

[0027] To prevent rain and snow from flowing back in, a cap 5 can be installed on the edge of the top cover 4, such as... Figure 2 As shown, the upper end of the cap 5 has a vertical edge, the inner diameter of which matches the outer diameter of the cover 4. The diameter of the cap 5 gradually increases from the edge downwards, and the top surface of the cap 5 is a downward-facing spherical arc. Rain and snow will naturally slide off the spherical arc of the cap 5 without accumulating on it, reducing the weight pressure from external rainwater or snow and ensuring the normal operation of the equipment. The diameter of the lower end of the cap 5 is larger than the diameter of the upper end of the protective cover 2, preventing backflow of wind during windy weather and reducing the exhaust efficiency of the kitchen fan; it also reduces the entry of rain and snow, preventing water leakage inside the house; the cap 5 can also prevent large foreign objects and birds from entering the kitchen fan.

[0028] The cap 5 has several vertical cap brackets 501. The upper end of the cap bracket 501 is fixedly connected to the cap 5, and the lower end extends into the protective cover 2. A nut is provided at the lower end, and the center line of the nut is in the horizontal direction. The protective cover 2 has a mounting hole 201 corresponding to the nut. The lower end of the cap bracket 501 and the mounting hole 201 are fixedly connected by bolts to fix the cap 5 to the protective cover 2. A second air outlet channel is left at the upper end of the cap 5 and the protective cover 2. The air containing oil fumes drawn by the kitchen fan escapes into the protective cover 2 and diffuses outside the kitchen fan through the second air outlet channel.

[0029] In heavy rain, strong winds, and heavy snow, the cap 5 can block the entry of rain, snow, and strong winds, avoiding the exhaust resistance caused by these factors to the kitchen fan. If the channel between the cap 5 and the upper end of the protective cover 2 is too large, its blocking effect on rain, snow, and strong winds is limited. If the channel between the cap 5 and the upper end of the protective cover 2 is too small, it will reduce the airflow of the exhaust gas from the kitchen fan, thus reducing the exhaust efficiency. The vertical distance between the upper end of the protective cover 2 and the cap 5 in this invention is between 50 and 200 mm.

[0030] The diameter of the protective cover 2 gradually decreases from top to bottom in a streamlined shape, similar to a bowl. The lower end of the protective cover 2, the upper surface of the base 1, the flared air guide ring 13, and the vertically upward air inlet 12 form a water tank. A small amount of rainwater backflow, or water droplets condensed due to temperature differences, as well as oil fumes carried in the indoor air, can enter the water tank along the inner wall of the protective cover 2 and the outer wall of the motor guard plate 6.

[0031] The lower end of the protective cover 2 is provided with a drain outlet 3 for timely drainage of oil and rainwater from the sink. One end of the drain outlet 3 is located on the protective cover 2, and the other end extends downwards at an angle to the outside of the frame of the base 1. Water or oil in the sink is quickly drained from the drain outlet 3 and flows away to the roof, without remaining on the kitchen fan.

[0032] A conduit 8 is provided on one side of the protective cover 2. The conduit 8 extends from inside the motor guard plate 6, through the motor guard plate 6 and the protective cover 2, to the outside of the protective cover 2, and is used to house the power cord of the motor 10. The conduit 8 slopes downward from the inside to the outside, so rainwater slides down the conduit 8 and will not flow back into the conduit 8. A protective coil is provided on the outer end face of the conduit 8. The protective coil is made of soft plastic or rubber material, which can form a buffer layer between the wire and the conduit 8 to prevent the wire from being worn at the opening of the conduit 8, and also form a seal on the opening to prevent moisture from entering. The end of the conduit 8 that connects to the motor guard plate 6 can optionally be provided with a waterproof connector 803. The waterproof connector 803 can prevent external dust and rainwater from entering the interior, and at the same time can avoid the safety hazard of loosening the terminal due to forceful pulling when external wiring is performed. At the junction of the conduit 8 with the motor guard plate 6 and the protective cover 2, a second sealing ring 801 and a third sealing ring 802 are respectively provided. The second sealing ring 801 seals the gap between the conduit 8 and the motor guard plate 6, and the third sealing ring 802 seals the gap between the conduit 8 and the protective cover 2.

[0033] A first sealing ring 601 is provided at the lower end of the motor guard plate 6. The first sealing ring 601 is located at the junction of the motor guard plate 6 and the horizontally arranged motor fixing plate 7 to prevent moisture from seeping in. The first sealing ring 601 is preferably U-shaped with the opening facing upwards, and the size of the opening is approximately equal to the thickness of the motor guard plate 6. The lower end of the motor guard plate 6 is fitted inside the first sealing ring 601 and then connected to the vertically arranged second support member 602 below. A first support member 701 is provided at the lower end of the motor fixing plate 7. The lower end of the first support member 701 is fixedly connected to the middle layer 102 of the base, and a horizontal support plate is provided at the upper end. The motor fixing plate 7 is fixedly connected to the upper support plate of the first support member 701. The upper end of the second support member 602 is lower than the upper support plate of the first support member 701. The lower end of the motor guard plate 6 is fitted inside the first sealing ring 601. The bottom of the first sealing ring 601 is in contact with the second support member 602, and the inner surface of the first sealing ring 601 is in contact with the outer edge of the motor fixing plate 7. Since the height of the upper support plate of the first support member 701 is higher than the upper end of the second support member 602, the height of the motor fixing plate 7 is higher than the lower end of the motor guard plate 6. When rainwater slides down from the outer wall of the motor guard plate 6 under the action of gravity, it will not seep into the motor fixing plate 7.

[0034] To further improve the waterproof performance of the kitchen fan and ensure circuit safety, the junction box 9 has two side lugs at its bottom. These lugs are fixedly connected to the motor mounting plate 7, supporting the bottom of the junction box 9 on top of the motor mounting plate 7. Even under extreme conditions, if there is a small amount of moisture on the motor mounting plate 7, the wiring in the junction box 9 will remain dry.

[0035] A mesh cover 10 is also provided between the lower end of the motor guard plate 6 and the protective cover 2. The mesh cover 10 can prevent people's hands from accidentally entering during operation, and can also prevent birds or large objects from entering. The mesh of the mesh cover 10 is relatively large and will not affect the flow rate of the exhaust gas.

[0036] Figure 6 The base 1 is a hollow platform. To enhance waterproofing, the base 1 can be configured as follows: Figure 7 The hollow, stepped structure shown has a base platform 101 at the bottom, with an open end serving as the air intake for the kitchen fan. A boss 102 protrudes upwards from the base platform 101, with a circular through-hole on its upper surface. A guide ring 13 is fixedly installed around the circular through-hole. Indoor air passes sequentially through the open end of the base platform 101, the circular through-hole of the boss 102, and into the guide ring 13 and air inlet duct 12. It is then drawn into the impeller 11 and exits into the first channel between the protective cover 2 and the motor guard plate 6, before passing through the cap 5 and being discharged outdoors through the upper end of the protective cover 2. The protective cover 2 is fixedly connected to the boss 102, with a sealing ring or gasket at the connection point. The height of the protective cover 2 is higher than that of the base platform 101 to prevent rainwater from the base surface from seeping into the kitchen fan through the protective cover 2 and the intermediate layer 102.

[0037] The base 1 and the air guide ring 13 can be integrally formed by stamping to prevent water leakage at the connection between the base 1 and the air guide ring 13. The upper outer end of the air guide ring 13 is sealed to the lower inner end of the air inlet duct 12, preferably by welding.

[0038] Figure 8 In another embodiment of this utility model, a horizontal ring 14 is provided between the protective cover 2 and the air guide ring 13. The protective cover 2, the ring 14 and the air guide ring 13 are integrally formed structures. The ring 14 is fixedly connected to the base 1 to prevent water from seeping into the bottom of the air guide ring 13.

[0039] This utility model of a kitchen fan features a cap on the edge of the top cover to shield the top of the protective shield, preventing backflow of air from strong winds and rain / snow during extreme weather conditions, thus avoiding water leakage inside the house caused by heavy rain and snow. The base and air guide ring are integrally formed, or the protective shield and air guide ring are integrally formed. The base can be optionally designed as a hollow stepped structure, and the inclusion of a drain outlet further prevents water leakage inside the house. The motor mounting plate is higher than the lower end of the motor guard plate, and a sealing ring is provided at the connection between the two to effectively prevent moisture from seeping into the motor mounting plate. The bottom surface of the junction box is higher than the motor mounting plate, further protecting the electrical circuit safety of the kitchen fan. The conduit slopes downwards from the inside to the outside and is equipped with a waterproof connector and a protective coil. Sealing rings are provided at the junctions of the conduit with the motor guard plate and the protective shield to protect the dryness and cleanliness of the conduit wiring.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A kitchen fan, comprising a base (1), characterized in that: A protective cover (2) is fixedly connected to the base (1). A top cover (4) is provided above the protective cover (2). A motor guard plate (6) is provided below the top cover (4). The motor guard plate (6) is a hollow cylindrical structure. A motor fixing plate (7) is provided below the motor guard plate (6). A drive motor (10) is provided on the motor fixing plate (7). The drive motor (10) is connected and fixed to the impeller (11) through the motor shaft. An air inlet (12) is provided below the impeller (11). The lower edge of the air inlet (12) is fixed on the air guide ring (13) of the base. An air inlet is opened on the base (1) corresponding to the air inlet (12). A first air outlet channel is left between the protective cover (2) and the motor guard plate (6). A cap (5) can be selectively provided on the outer edge of the top cover (4). A second air outlet channel is left between the cap (5) and the upper end of the protective cover (2).

2. The kitchen fan according to claim 1, characterized in that, The cap (5) is provided with several vertical cap brackets (501). The upper end of the cap bracket (501) is fixedly connected to the cap (5), and the lower end extends into the protective cover (2). The lower end is provided with a nut, and the protective cover (2) is provided with a corresponding mounting hole (201) at the nut. The nut at the lower end of the cap bracket (501) and the mounting hole (201) are fixedly connected by bolts.

3. The kitchen fan according to claim 2, characterized in that, The cap (5) has a vertical edge at its upper end. The inner diameter of the edge matches the outer diameter of the cover (4). The diameter of the cap (5) gradually increases from the upper edge downwards, forming a spherical arc. The diameter of the lower end of the cap (5) is greater than the diameter of the upper end of the protective cover (2). The distance between the upper end of the outer wall of the protective cover (2) and the outer end of the inner wall of the cap (5) is between 50 and 200 mm.

4. The kitchen fan according to claim 3, characterized in that, The base (1) is a hollow stepped structure with a base platform (101) at the bottom. The base platform (101) has a boss (102) protruding upward. A circular through hole is provided on the upper surface of the boss (102). A guide ring (13) is fixedly provided around the circular through hole. The protective cover (2) is connected to the boss (102), and a sealing ring or sealing gasket is provided at the connection.

5. The kitchen fan according to claim 4, characterized in that, The base (1) and the air guide ring (13) are integrally formed, and the outer end of the air guide ring (13) is sealed to the inner end of the air inlet tube (12).

6. The kitchen fan according to claim 3, characterized in that, The diameter of the protective cover (2) gradually decreases from top to bottom in a streamlined shape. The lower end of the protective cover (2), the upper surface of the base (1), the horn-shaped air guide ring (13) and the vertically upward air inlet (12) form a water tank. The lower end of the protective cover (2) is provided with a drain outlet (3). One end of the drain outlet (3) is located at the lower end of the protective cover (2), and the other end extends downward at an angle to the outside of the frame of the base (1).

7. The kitchen fan according to claim 6, characterized in that, A circular ring (14) is provided between the protective cover (2) and the air guide ring (13). The protective cover (2), the circular ring (14) and the air guide ring (13) are integrally formed structures. The circular ring (14) is fixedly connected to the base (1).

8. The kitchen fan according to claim 3, characterized in that, A conduit (8) is provided on one side of the protective cover (2). The conduit (8) passes through the motor guard plate (6) and the protective cover (2) and extends to the outside of the protective cover (2). The conduit (8) slopes downward from the inside to the outside. A protective coil is provided on the outer end face of the conduit (8). A waterproof connector (803) is provided at the end of the conduit (8) that connects to the motor guard plate (6). A second sealing ring (801) and a third sealing ring (802) are respectively provided at the junction of the conduit (8), the motor guard plate (6), and the protective cover (2). The second sealing ring (801) seals the gap between the conduit (8) and the motor guard plate (6), and the third sealing ring (802) seals the gap between the conduit (8) and the protective cover (2).

9. The kitchen fan according to claim 3, characterized in that, A first sealing ring (601) is provided at the junction of the motor guard plate (6) and the horizontally arranged motor fixing plate (7). The height of the motor fixing plate (7) is higher than the lower end of the motor guard plate (6). The first sealing ring (601) is sleeved on the lower end of the motor guard plate (6), and the inner side wall of the first sealing ring (601) is connected to the motor fixing plate (7).

10. The kitchen fan according to claim 3, characterized in that, The drive motor (10) includes a junction box (9) and a motor. The motor power cord is electrically connected to the terminal block inside the junction box (9). The motor and the junction box (9) are both fixed on the motor mounting plate (7). The bottom of the junction box (9) is provided with two side ears, which are fixedly connected to the motor mounting plate (7) to support the bottom of the junction box (9) on the motor mounting plate (7).

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