A range hood with water curtain purification function

Abstract

This invention relates to the field of kitchen equipment technology, specifically disclosing a range hood with a water curtain purification function, comprising a body, an exhaust system, and a water curtain purification device. The exhaust system is responsible for drawing fumes from the body and expelling them outdoors, while the water curtain purification device supplies water to the atomizing nozzles via a water supply system. The nozzles continuously spray water mist within the purification space outside the fan inlet, forming a water curtain. Compared with existing technologies, the range hood of this invention can effectively adsorb and purify grease and particulate matter in fumes, achieving deep purification of cooking fumes. This not only improves the efficiency of fume purification but also significantly reduces the pollution of the atmosphere by cooking fumes, contributing to improved air quality and people's living environment.

Description

Technical Field

[0001] This invention relates to the field of kitchen equipment technology, and specifically to a range hood with a water curtain purification function. Background Technology

[0002] Range hoods, as a household appliance designed to optimize the kitchen environment, are usually installed above the stove. Their core function is to efficiently capture and remove cooking fumes and combustion byproducts, including harmful substances that pose a threat to human health, thereby ensuring fresh kitchen air and providing a safer and cleaner cooking space.

[0003] In Chinese culinary culture, high-temperature cooking methods such as frying, stir-frying, and deep-frying are extremely common, often resulting in kitchens filled with cooking fumes. Traditional range hoods work by drawing in these fumes through a built-in fan and directly venting them outdoors via flues and exhaust pipes. However, this direct emission method not only burdens the environment and is detrimental to environmental protection, but may also affect the health of nearby residents due to the spread of cooking fumes. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of environmental pollution caused by exhaust gas from existing range hoods, and to provide a range hood with a water curtain purification function.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] A range hood with a water curtain purification structure includes a body, an exhaust system mounted on the body, and a water curtain purification device. The exhaust system includes an exhaust duct and a fan. The fan is mounted on the exhaust duct and is used to draw smoke from the air inlet of the body into the exhaust duct and finally discharge it outdoors through the air outlet of the body. The water curtain purification device includes a water supply system, an atomizing nozzle, and an outer cover. The outer cover is installed outside the fan inlet, and its inner side forms a purification space through which smoke can pass. The atomizing nozzle is disposed on the side of the purification space and connected to the water supply system. The atomizing nozzle continuously sprays water mist and forms a water curtain in the purification space to adsorb grease and particulate matter in the smoke.

[0007] The range hood of this invention adds a water mist purification function to the exhaust function, which can efficiently adsorb and purify grease and particulate matter in the smoke. The barrier formed by the water mist effectively intercepts the pollutants in the smoke, deeply purifies the smoke, significantly reduces the content of harmful substances in the smoke, thereby reducing the pollution of the atmospheric environment caused by smoke emissions, helping to improve air quality, and providing people with a healthier and more livable living environment.

[0008] Furthermore, it also includes a return pipe, with the bottom of the outer casing connected to the return pipe. Water molecules in the water mist flow into the return pipe along the inner wall of the outer casing under the influence of gravity. This range hood also has a return function, which can collect and discharge water containing grease and particles, making the machine easier to clean and maintain, and reducing the frequency and difficulty of cleaning the range hood.

[0009] Furthermore, the bottom of the fan is provided with an oil drain hole, and the return pipe is provided with a first return branch and a second return branch. The first return branch is connected to the outer casing, and the second return branch is connected to the fan's drain hole. Since some water mist and flue gas will enter the fan, the particles in the flue gas combine with the water mist inside and are thrown onto the inner wall of the fan casing by the centrifugal force of the impeller. Therefore, providing an oil drain hole on the fan can effectively drain the oil inside the fan through the second return branch.

[0010] Furthermore, the outer casing includes a water baffle and an annular return flow guide. One side of the return flow guide is connected to the fan inlet, and the water baffle is located on the other side, with multiple ventilation holes. In this design, the water baffle ensures smooth passage of flue gas while preventing water mist from splashing directly out of the outer casing, thus improving purification efficiency and safety. Simultaneously, the water mist forms a water curtain on the water baffle. This water curtain not only further intercepts pollutants in the flue gas but also increases the contact area and contact time between the water mist and the flue gas, thereby improving purification efficiency. The formation of the water curtain makes the purification process more continuous and stable, ensuring a good purification effect.

[0011] Furthermore, at least two baffles are spaced apart, and the atomizing nozzle is located between two adjacent baffles. In this design, because the atomizing nozzle forms a large angle (usually 90 degrees) with the airflow, the sprayed water mist will not be carried away directly along the airflow direction, but will instead be sprayed onto the baffles on both sides.

[0012] Furthermore, the return flow guide is equipped with a nozzle mounting part, through which the atomizing nozzle is mounted on the inner side of the outer cover. This design sets the water mist spray direction perpendicular to the flue gas flow direction, which can more effectively intercept and adsorb grease and particulate matter in the flue gas, while also helping to balance and stabilize the airflow at the fan inlet. When the flue gas passes through the return flow guide, the vertical water mist can form a uniform barrier, preventing the flue gas from generating eddies or turbulence within the channel, thereby ensuring that the flue gas can pass through the purification space smoothly and orderly, further improving purification efficiency.

[0013] Furthermore, the vent is a flanged hole. This design uses flanged holes for the vent, so when the water mist is sprayed onto the baffle plate, the water droplets will bounce back a second time. This bounce not only increases the contact opportunity between the water mist and the flue gas, but also allows the water droplets to further atomize during the bounce, forming finer, more uniform droplets. These fine droplets can more effectively adsorb grease and particulate matter in the flue gas because they have a larger surface area and more thorough contact with the flue gas. Through the above design, the water mist forms a denser, more uniform atomized layer between the baffle plates. This atomized layer can more effectively intercept and purify pollutants in the flue gas, thereby improving purification efficiency.

[0014] Furthermore, at least three atomizing nozzles are evenly distributed. This design ensures comprehensive water curtain coverage and improves the purification effect.

[0015] Furthermore, the water supply system includes a water tank and a water pump. The water tank is equipped with a water inlet and a water outlet. The nozzle is connected to the water tank through a water supply pipe. The water pump is installed on the water supply pipe. The water inlet is used to connect to an external water supply device.

[0016] Furthermore, the water tank also includes a return port, which is connected to the output end of the return pipe. This allows the water tank, water supply system, and return system to be sequentially connected to form a circulating water circuit, enabling the water in the tank to be recycled multiple times. This eliminates the need to connect to an external water supply device while the range hood is operating; instead, the water can be changed after a period of use, depending on actual conditions. When changing the water, the existing water can be drained through the inlet before adding new water. Alternatively, a separate drain outlet can be provided on the water tank for discharging wastewater.

[0017] Furthermore, the return flow guide includes a first annular portion and a second annular portion. The return flow guide is connected to the fan through the first annular portion. Two baffles are provided, and the two baffles are respectively assembled at one end of the two ends of the second annular portion.

[0018] Furthermore, the return flow guide also includes an inclined connecting portion, wherein the diameter of the second annular portion is set to be larger than that of the first annular portion, and the inclined connecting portion connects the first annular portion and the second annular portion. The structural design of this solution allows a water curtain to form within the second annular portion, and the inclined connecting portion and the first annular portion can compress the airflow and the air velocity at the fan inlet, thereby improving filtration efficiency. Attached Figure Description

[0019] Figure 1 It is a structural breakdown of a range hood. Figure 1 ;

[0020] Figure 2 This is a simplified structural diagram of the circulating water system;

[0021] Figure 3 This is a schematic diagram of the outer casing. Figure 1 ;

[0022] Figure 4 This is a schematic diagram of the outer casing. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the outer casing. Figure 3 ;

[0024] Figure 6 This is a cross-sectional view of the outer casing.

[0025] Figure 7 It is a structural breakdown of a range hood. Figure 2 ;

[0026] Label Explanation:

[0027] 1. Range hood, 10. Body, 11. Fan, 13. Oil drain hole, 15. Air outlet, 16. Air duct, 17. Air inlet, 2. Water curtain purification device, 31. Water tank, 311. Water inlet, 312. Water outlet, 313. Water supply pipe, 32. Atomizing nozzle, 4. Outer cover, 5. Water baffle, 51. Ventilation hole, 511. Return guide, 52. First annular part, 521. Inclined connecting part, 522. Second annular part, 523. Nozzle mounting part, 524. Drain hole, 525. Return pipe, 6. First return branch, 61. Second return branch, 62. Detailed Implementation

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0029] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] See Figure 1-7As shown, this invention discloses a range hood 1 with a water curtain purification structure, including a body 10, an exhaust system and a water curtain purification device 2 disposed on the body 10. The exhaust system includes an exhaust channel and a fan 11. The fan 11 is mounted on the exhaust channel and is used to draw smoke from the air inlet of the body 10 into the exhaust channel and finally discharge it outdoors through the air outlet 15 of the body 10. The water curtain purification device 2 includes a water supply system, an atomizing nozzle 4 and an outer cover 5. The outer cover 5 is disposed on the outside of the inlet of the fan 11, and its inner side forms a purification space through which smoke can pass. The atomizing nozzle 4 is disposed on the side of the purification space and connected to the water supply system. The atomizing nozzle 4 continuously sprays water mist and forms a water curtain in the purification space to adsorb grease and particulate matter in the smoke.

[0031] It also includes a return pipe 6. The bottom of the outer cover 5 is connected to the return pipe 6 through a drain hole 525. Water molecules in the water mist flow into the return pipe 6 along the inner wall of the outer cover 5 under the action of gravity. This range hood 1 also has a return function, which can collect and discharge water containing grease and particles, making the body 10 easier to clean and maintain, and reducing the frequency and difficulty of cleaning the range hood 1. The bottom of the outer cover 5 is provided with a drain spout, and the outer cover 5 is connected to the return pipe 6 through the drain spout.

[0032] The bottom of the aforementioned fan 11 is provided with an oil drain hole 13. The return pipe 6 is provided with a first return branch 61 and a second return branch 62. It is connected to the outer casing 5 through the first return branch 61 and to the drain hole of the fan 11 through the second return branch 62. Since some water mist and flue gas will enter the inside of the fan 11, the particles in the flue gas combine with the water mist inside and are thrown onto the inner wall of the fan 11 casing by the centrifugal force of the impeller. Therefore, the oil drain hole 13 on the fan 11 can effectively drain the oil inside the fan 11 through the second return branch 62.

[0033] The aforementioned outer casing 5 includes a water baffle 51 and an annular return flow guide 52. One side of the return flow guide 52 is connected to the inlet of the fan 11, and the water baffle 51 is located on the other side. The water baffle 51 is provided with multiple ventilation holes 511. In this design, the water baffle 51 ensures the smooth passage of flue gas while preventing water mist from splashing directly out of the outer casing 5, thus improving purification efficiency and safety. Simultaneously, the water mist forms a water curtain on the water baffle 51. This water curtain not only further intercepts pollutants in the flue gas but also increases the contact area and contact time between the water mist and the flue gas, thereby improving purification efficiency. The formation of the water curtain makes the purification process more continuous and stable, ensuring a good purification effect.

[0034] At least two water baffles 51 are provided at intervals, and the atomizing nozzle 4 is located between two adjacent water baffles 51. In this design, since the atomizing nozzle 4 forms a large angle (usually 90 degrees) with the airflow, the sprayed water mist will not be carried away directly along the airflow direction, but will be sprayed onto the water baffles 51 on both sides.

[0035] The aforementioned return flow guide 52 is equipped with a nozzle mounting part 524, through which the atomizing nozzle 4 is mounted to the inner side of the outer cover 5. This design sets the water mist spray direction perpendicular to the flue gas flow direction, which can more effectively intercept and adsorb grease and particulate matter in the flue gas, while also helping to balance and stabilize the airflow at the inlet of the fan 11. When the flue gas passes through the return flow guide 52, the vertical water mist can form a uniform barrier, preventing the flue gas from generating eddies or turbulence in the channel, thereby ensuring that the flue gas can pass through the purification space smoothly and orderly, further improving purification efficiency.

[0036] The aforementioned vent 511 is a flanged hole. In this design, the vent 511 is a flanged hole, so when water mist is sprayed onto the baffle plate 51, the water droplets will bounce back a second time. This bounce not only increases the contact opportunity between the water mist and the flue gas, but also allows the water droplets to further atomize during the bounce process, forming finer, more uniform water droplets. These fine water droplets can more effectively adsorb grease and particulate matter in the flue gas because they have a larger surface area and more thorough contact with the flue gas. Through the above design, the water mist forms a denser and more uniform atomized layer between the baffle plates 51. This atomized layer can more effectively intercept and purify pollutants in the flue gas, thereby improving purification efficiency.

[0037] The diameter of the aforementioned vent 511 ranges from 3mm to 5mm, and the height of the vent is between 2mm and 3mm.

[0038] At least three atomizing nozzles 4 are evenly distributed. This design ensures comprehensive water curtain coverage and improves purification efficiency.

[0039] The water supply system includes a water tank 31 and a water pump (not shown in the figure). The water tank 31 is provided with a water inlet 311 and a water outlet 312. The nozzle is connected to the water tank 31 through a water supply pipe 32. The water pump is installed on the water supply pipe 32. The water inlet 311 is used to connect to an external water supply device.

[0040] The water tank 31 also includes a return port 313, which is connected to the output end of the return pipe 6, so that the water tank 31, the water supply system and the return system are connected in sequence to form a circulating water circuit.

[0041] The aforementioned return flow guide 52 includes a first annular portion 521 and a second annular portion 523. The return flow guide 52 is connected to the fan 11 through the first annular portion 521. Two baffle plates 51 are provided, and the two baffle plates 51 are respectively assembled at one end of the two ends of the annular portion.

[0042] The aforementioned return flow guide 52 also includes an inclined connecting portion 522. The diameter of the second annular portion 523 is set to be larger than that of the first annular portion 521. The inclined connecting portion 522 connects the first annular portion 521 and the second annular portion 523. The structural design of this solution allows the water curtain to be formed within the second annular portion 523. The inclined connecting portion 522 and the first annular portion 521 can compress the airflow and the air velocity at the inlet of the fan 11, thereby improving the filtration efficiency.

[0043] The aforementioned body 10 includes an air outlet duct 16 and an air inlet 17. The fan 11 is located inside the air outlet duct 16, the water tank 31 is located on one side of the upper part of the air inlet 17, and the outer cover 5 is located at the rear end of the fan 11.

[0044] The range hood 1 of this invention adds a water mist purification function to the exhaust function, which can efficiently adsorb and purify grease and particulate matter in the fumes. The barrier formed by the water mist effectively intercepts pollutants in the fumes, improving the cleanliness of the kitchen air.

[0045] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this invention should also fall within the protection scope of the claims of this invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this invention.

Claims

1. A range hood (1) with a water curtain purification function, characterized in that: The device includes a body (10), an exhaust system and a water curtain purification device (2) mounted on the body (10). The exhaust system includes an exhaust channel and a fan (11). The fan (11) is mounted on the exhaust channel. The water curtain purification device (2) includes a water supply system, an atomizing nozzle (4) and an outer cover (5). The outer cover (5) is placed on the outside of the air inlet of the fan (11), and its inner side forms a purification space through which flue gas can pass. The atomizing nozzle (4) is arranged on the side of the purification space and connected to the water supply system. The atomizing nozzle (4) continuously sprays water mist to form a water curtain in the purification space. The outer cover (5) includes a water baffle (51), at least two water baffles (51) are provided at intervals, and the atomizing nozzle (4) is located between two adjacent water baffles (51); The baffle plate (51) is provided with a plurality of ventilation holes (511), and the ventilation holes (511) are flanged holes; The water supply system includes a water tank (31) and a water pump. The water tank (31) is provided with a water inlet (311) and a water outlet (312). The atomizing nozzle (4) is connected to the water tank (31) through a water supply pipe (32). The water pump is installed on the water supply pipe (32). The water tank (31) also includes a return port (313). The return port (313) is connected to the bottom of the outer cover (5) through a return pipe (6), so that the water tank (31), the water supply pipe (32), the atomizing nozzle (4), the outer cover (5) and the return pipe (6) are connected in sequence to form a circulating water circuit.

2. The range hood (1) according to claim 1, characterized in that: It also includes a return pipe (6), the bottom of the outer cover (5) is connected to the return pipe (6), and the water molecules in the water mist flow down along the inner wall of the outer cover (5) under the action of gravity and flow into the return pipe (6) along the inner wall of the guide.

3. The range hood (1) according to claim 1, characterized in that: It also includes a return pipe (6), and the bottom of the blower (11) is provided with an oil leakage hole (13). The return pipe (6) is provided with a first return branch (61) and a second return branch (62). It is connected to the outer cover (5) through the first return branch (61) and to the drain hole (525) of the blower (11) through the second return branch (62).

4. The range hood (1) according to claim 1, characterized in that: The outer cover (5) includes a baffle plate (51) and an annular return guide (52). One side of the return guide (52) is connected to the inlet of the fan (11), and the baffle plate (51) is located on the other side. The baffle plate (51) is provided with a plurality of ventilation holes (511).

5. The range hood (1) according to claim 4, characterized in that: The return guide (52) is provided with a nozzle mounting part (524), and the atomizing nozzle (4) is mounted on the inside of the outer cover (5) through the mounting part.

6. The range hood (1) according to claim 1, characterized in that: The return flow guide (52) includes a first annular portion (521) and a second annular portion (523). The return flow guide (52) is connected to the fan (11) through the first annular portion. There are two baffles (51), and the two baffles (51) are respectively assembled at one end of the two ends of the second annular portion (523).

7. The range hood (1) according to claim 6, characterized in that: The return flow guide (52) further includes an inclined connecting portion (522), the diameter of the second annular portion (523) is set to be larger than that of the first annular portion (521), and the inclined connecting portion (522) is connected between the first annular portion (521) and the second annular portion (523).

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