Range hood with water curtain purification function

Abstract

The invention relates to the technical field of kitchen equipment, and particularly discloses a range hood with a water curtain purification function, which comprises a machine body, an exhaust system and a water curtain purification device. The exhaust system is responsible for sucking flue gas from the machine body and exhausting the flue gas out of the room, the water curtain purification device provides a water source for the atomization spray head through the water supply system, and the spray head continuously sprays water mist in the purification space on the outer side of the inlet of the fan to form a water curtain. Compared with the prior art, the range hood disclosed by the invention can effectively adsorb and purify grease and particulate matters in flue gas, realizes deep purification of oil fume, not only improves the oil fume purification efficiency, but also remarkably reduces the pollution of the oil fume to the atmospheric environment, and is beneficial to improving the air quality and the living environment of people.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen equipment, and in particular to a range hood with a water curtain purification function. Background Art

[0002] As a household appliance designed to optimize the kitchen environment, the range hood is usually installed above the stove. Its core function is to efficiently capture and remove oil smoke and combustion by-products generated during cooking, including those harmful substances that pose a threat to human health, thereby ensuring fresh air in the kitchen and providing a safer and cleaner cooking space.

[0003] In Chinese food culture, high-temperature cooking methods such as frying, stir-frying, and deep-frying are extremely common, which often leads to the filling of kitchen fumes. The working principle of traditional range hoods is to suck these fumes through the built-in fan wheel and directly discharge them to the outdoors through the flue and exhaust pipe. However, this direct discharge method not only puts a burden on the environment and is not conducive to environmental protection, but may also affect the health of surrounding residents due to the spread of fumes. Summary of the invention

[0004] The invention aims to solve the problem that the waste gas discharged from the existing range hoods pollutes the environment and to provide a range hood with a water curtain purification function.

[0005] In order to achieve the above invention object, the present invention adopts the following technical scheme:

[0006] A range hood with a water curtain purification structure comprises a machine body, an exhaust system arranged on the machine body and a water curtain purification device, wherein the exhaust system comprises an exhaust passage and a fan, wherein the fan is mounted on the exhaust passage and is used to suck smoke from an air inlet of the machine body into the exhaust passage and finally discharge the smoke to the outside through an air outlet of the machine body, wherein the water curtain purification device comprises a water supply system, an atomizing nozzle and an outer cover, wherein the outer cover is arranged on the outside of the fan inlet and forms a purification space inside the outer cover for smoke to pass through, wherein the atomizing nozzle is arranged on the side of the purification space and is connected to the water supply system, wherein the atomizing nozzle continuously sprays water mist and forms a water curtain in the purification space to absorb grease and particulate matter in the smoke.

[0007] The range hood of the present invention has an added water mist purification function on the basis of the exhaust function, which can efficiently absorb 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, and significantly reduces the content of harmful substances in the smoke, thereby reducing the pollution of the atmospheric environment 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, the bottom of the outer cover is connected to the return pipe, and the water molecules in the water mist flow into the return pipe along the inner wall of the outer cover under the action of gravity. The range hood also has a return function, which can collect and discharge water containing grease and particles, making the machine body easy to clean and maintain, reducing the frequency and difficulty of cleaning the range hood.

[0009] Furthermore, the bottom of the fan is provided with an oil leakage hole, and the return pipe is provided with a first return branch and a second return branch, which is connected to the outer cover through the first return branch, and is connected to the drain hole of the fan through the second return branch. Since part of the water mist and smoke will enter the interior of the fan, the particles in the smoke will combine with the water mist inside and be thrown onto the inner wall of the fan housing through the centrifugal force of the wind wheel. Therefore, the oil leakage hole is provided on the fan, which can effectively drain the oil in the fan through the second return branch.

[0010] Furthermore, the outer cover includes a water baffle and an annular reflux guide, one side of the reflux guide is connected to the fan inlet, and the water baffle is arranged on the other side thereof, and the water baffle is provided with a plurality of vents. In this solution, the design of the water baffle not only ensures the smooth passage of smoke, but also prevents the water mist from directly splashing out of the outer cover, thereby improving the purification efficiency and safety. At the same time, the water mist will form a layer of water curtain on the water baffle, which not only further intercepts the pollutants in the smoke, but also increases the contact area and contact time between the water mist and the smoke, thereby improving the 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 water baffles are provided at intervals, and the atomizing nozzle is located between two adjacent water baffles. In this solution, since a large angle (usually 90 degrees) is formed between the atomizing nozzle and the airflow, this means that the sprayed water mist will not be directly carried away along the airflow direction, but will be sprayed more onto the water baffles on both sides.

[0012] Furthermore, a nozzle mounting portion is provided on the reflux guide, and the atomizing nozzle is mounted on the inner side of the outer cover through the mounting portion. This solution sets the spray direction of the water mist to be perpendicular to the airflow direction of the flue gas, which can more effectively intercept and adsorb grease and particulate matter in the flue gas, and at the same time help balance and stabilize the airflow at the fan inlet. When the flue gas passes through the reflux guide, the vertical water mist can form a uniform barrier to prevent the flue gas from generating eddy currents or turbulence in the channel, thereby ensuring that the flue gas can pass through the purification space smoothly and orderly, further improving the purification efficiency.

[0013] Furthermore, the vent is a flanged hole. In this solution, the vent is set as a flanged hole, and when the water mist is sprayed onto the water retaining plate, the water droplets will rebound twice. This rebound not only increases the contact opportunity between the water mist and the flue gas, but also makes the water droplets further atomized during the rebound process to form smaller and more uniform water droplets. These fine water droplets can more effectively absorb grease and particulate matter in the flue gas because they have a larger surface area and more complete contact with the flue gas. Through the above design, the water mist forms a denser and more uniform atomization layer between the water retaining plates. This atomization layer can more effectively intercept and purify the pollutants in the flue gas, thereby improving the purification efficiency.

[0014] Furthermore, the atomizing nozzles are evenly arranged at least 3. This solution ensures all-round coverage of the water curtain and improves the purification effect.

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

[0016] Furthermore, the water tank further comprises a reflux port, which is connected to the output end of the reflux pipe, so that the water tank, the water supply system, and the reflux system are sequentially connected to form a circulating water circuit, so that the water in the water tank can be recycled for multiple times, and there is no need to connect an external water supply device when the range hood is working. Instead, the water can be changed after a period of use according to actual conditions. When changing the water, the water can be discharged through the water replenishment port first, and then new water can be input. Of course, a drain port can also be set on the water tank to discharge waste water.

[0017] Furthermore, the return flow guide comprises a first annular portion and a second annular portion, the return flow guide is connected to the fan via the first annular portion, two water baffles are provided, and the two water baffles are respectively assembled at one end of the second annular portion.

[0018] Furthermore, the return flow guide also includes an inclined connection portion, the diameter of the second annular portion is set to be larger than that of the first annular portion, and the inclined connection portion is connected between the first annular portion and the second annular portion. The structural design of this solution enables the water curtain to be formed in the second annular portion, and the inclined connection portion and the first annular portion can compress the airflow and the wind speed at the fan inlet, thereby improving the filtering efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the structural decomposition of the range hood Figure 1 ;

[0020] Figure 2 It is a simplified structural diagram of the circulating water circuit;

[0021] Figure 3 This is the structure diagram of the outer cover. Figure 1 ;

[0022] Figure 4 This is the structure diagram of the outer cover. Figure 2 ;

[0023] Figure 5 This is the structure diagram of the outer cover. Figure 3 ;

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

[0025] Figure 7 It is the structural decomposition of the range hood Figure 2 ;

[0026] Description of labels:

[0027] Range hood 1, machine body 10, fan 11, oil leakage hole 13, air outlet 15, air outlet pipe 16, air inlet 17, water curtain purification device 2, water tank 31, water replenishment port 311, water outlet 312, reflux port 313, water supply pipe 32, atomizing nozzle 4, outer cover 5, water baffle 51, vent hole 511, reflux guide 52, first annular portion 521 inclined connecting portion 522, second annular portion 523, nozzle mounting portion 524, drainage hole 525, reflux pipe 6, first reflux branch channel 61, and second reflux branch channel 62. DETAILED DESCRIPTION

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

[0029] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by “up”, “down”, “left”, “right”, “horizontal”, “inside”, “outside”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] See also Figure 1-7As shown, the present invention discloses a range hood 1 with a water curtain purification structure, comprising a machine body 10, an exhaust system arranged on the machine body 10 and a water curtain purification device 2, the exhaust system comprising an exhaust channel and a fan 11, the fan 11 is mounted on the exhaust channel, and is used to suck smoke from the air inlet of the machine body 10 into the exhaust channel, and finally discharge it to the outdoors through the air outlet 15 of the machine body 10, the water curtain purification device 2 comprises a water supply system, an atomizing nozzle 4 and an outer cover 5, the outer cover 5 is arranged on the outside of the inlet of the fan 11, and the inner side of the outer cover forms a purification space for smoke to pass through, the atomizing nozzle 4 is arranged on the side of the purification space and is connected to the water supply system, the atomizing nozzle 4 continuously sprays water mist, and forms a water curtain in the purification space to absorb grease and particulate matter in the smoke.

[0031] It also includes a return pipe 6, and the bottom of the outer cover 5 is connected to the return pipe 6 through a drainage hole 525. The 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. The range hood 1 also has a return function, which can collect and discharge water containing grease and particles, making the machine body 10 easy to clean and maintain, and reducing the frequency and difficulty of cleaning the range hood 1. A water leakage nozzle is provided at the bottom of the outer cover 5, and the outer cover 5 is connected to the return pipe 6 through the water leakage nozzle.

[0032] The bottom of the fan 11 is provided with an oil leakage hole 13, and the return pipe 6 is provided with a first return branch channel 61 and a second return branch channel 62, which is connected to the outer cover 5 through the first return branch channel 61, and is connected to the drainage hole of the fan 11 through the second return branch channel 62. Since part of the water mist and smoke will enter the inside of the fan 11, the particles in the smoke will combine with the water mist inside and be thrown onto the inner wall of the fan 11 shell by the centrifugal force of the wind wheel. Therefore, the oil leakage hole 13 is provided on the fan 11, and the oil pollution in the fan 11 can be effectively discharged through the second return branch channel 62.

[0033] The outer cover 5 includes a water baffle 51 and an annular reflux guide 52, one side of the reflux guide 52 is connected to the inlet of the fan 11, and the water baffle 51 is arranged on the other side thereof. The water baffle 51 is provided with a plurality of vents 511. In this solution, the design of the water baffle 51 not only ensures the smooth passage of smoke, but also prevents the water mist from directly splashing out of the outer cover 5, thereby improving the purification efficiency and safety. At the same time, the water mist will form a layer of water curtain on the water baffle 51, which not only further intercepts the pollutants in the smoke, but also increases the contact area and contact time between the water mist and the smoke, thereby improving the 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 solution, since a large angle (usually 90 degrees) is formed between the atomizing nozzle 4 and the airflow, this means that the sprayed water mist will not be directly carried away along the airflow direction, but will be sprayed more onto the water baffles 51 on both sides.

[0035] The return guide 52 is provided with a nozzle mounting portion 524, and the atomizing nozzle 4 is mounted on the inner side of the outer cover 5 through the mounting portion. In this solution, the spray direction of the water mist is set to be perpendicular to the airflow direction of the smoke, which can more effectively intercept and adsorb grease and particulate matter in the smoke, and at the same time help to balance and stabilize the airflow at the inlet of the fan 11. When the smoke passes through the return guide 52, the vertical water mist can form a uniform barrier to prevent the smoke from generating eddy currents or turbulence in the channel, thereby ensuring that the smoke can pass through the purification space smoothly and orderly, further improving the purification efficiency.

[0036] The above-mentioned vent hole 511 is a flanged hole. In this solution, the vent hole 511 is set as a flanged hole. When the water mist is sprayed onto the water baffle 51, the water droplets will rebound twice. This rebound not only increases the contact opportunity between the water mist and the flue gas, but also makes the water droplets further atomized during the rebound process to form smaller and more uniform water droplets. These fine water droplets can more effectively absorb grease and particulate matter in the flue gas because they have a larger surface area and more complete contact with the flue gas. Through the above design, the water mist forms a denser and more uniform atomization layer between the water baffles 51. This atomization layer can more effectively intercept and purify the pollutants in the flue gas, thereby improving the purification efficiency.

[0037] The diameter of the vent hole 511 is between 3 mm and 5 mm, and the height of the hole is between 2 mm and 3 mm.

[0038] At least three atomizing nozzles 4 are evenly arranged. This solution ensures all-round coverage of the water curtain and improves the purification effect.

[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 arranged 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 further comprises a reflux port 313 , which is connected to the output end of the reflux pipe 6 , so that the water tank 31 , the water supply system and the reflux system are sequentially connected to form a circulating water circuit.

[0041] The return guide 52 includes a first annular portion 521 and a second annular portion 523. The return guide 52 is connected to the fan 11 via the first annular portion 521. Two water baffles 51 are provided, and the two water baffles 51 are respectively assembled at one end of the annular portion.

[0042] The above-mentioned backflow guide 52 also includes an inclined connection portion 522, the diameter of the second annular portion 523 is set to be larger than the first annular portion 521, and the inclined connection portion 522 is connected between the first annular portion 521 and the second annular portion 523. The structural design of this solution enables the water curtain to be formed in the second annular portion 523, and the inclined connection portion 522 and the first annular portion 521 can compress the airflow and the wind speed at the inlet of the fan 11, thereby improving the filtering efficiency.

[0043] The machine body 10 includes an air outlet pipe 16 and an air inlet portion 17 . The fan 11 is disposed in the air outlet pipe 16 . The water tank 31 is disposed on one side of the upper portion of the air inlet portion 17 . The outer cover 5 is disposed at the rear end of the fan 11 .

[0044] The range hood 1 of the present invention has a water mist purification function in addition to the exhaust function, and can efficiently absorb and purify grease and particulate matter in the smoke. The barrier formed by the water mist effectively intercepts the pollutants in the smoke and improves the cleanliness of the kitchen air.

[0045] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs can also change and modify the above-mentioned implementation mode. Therefore, the present invention is not limited to the specific implementation modes disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A range hood with a water curtain purification function (1), characterized in that: The invention comprises a machine body (10), an exhaust system arranged on the machine body (10), and a water curtain purification device (2), wherein the exhaust system comprises an exhaust passage and a fan (11), wherein the fan (11) is mounted on the exhaust passage, and the water curtain purification device (2) comprises a water supply system, an atomizing nozzle (4), and an outer cover (5), wherein the outer cover (5) is arranged on the outside of the air inlet of the fan (11), and the inner side of the outer cover forms a purification space for smoke to pass through, wherein the atomizing nozzle (4) is arranged on the side of the purification space and is connected to the water supply system, and wherein the atomizing nozzle (4) continuously sprays water mist to form a water curtain in the purification space.

2. The range hood (1) according to claim 1, characterized in that: It also comprises a return pipe (6), the bottom of the outer cover (5) is connected to the return pipe (6), and 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.

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

4. The range hood (1) according to claim 1, characterized in that: The outer cover (5) comprises 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 arranged on the other side thereof, and the water baffle (51) is provided with a plurality of ventilation holes (511).

5. The range hood (1) according to claim 1, characterized in that: At least two water baffles (51) are provided at intervals, and the atomizing nozzle (4) is located between two adjacent water baffles (51).

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

7. The range hood (1) according to claim 5, characterized in that: The vent hole (511) is a flanged hole.

8. The range hood (1) according to claim 1, characterized in that: The water supply system comprises a water tank (31) and a water pump; the water tank (31) is provided with a water replenishment port (311) and a water outlet (312); the nozzle is connected to the water tank (31) via a water supply pipe (32); the water pump is arranged on the water supply pipe (32); and the water replenishment port (311) is used to be connected to an external water supply device.

9. The range hood (1) according to claim 8, characterized in that: The return flow guide (52) comprises a first annular portion (521) and a second annular portion (523); the return flow guide (52) is connected to the fan (11) via the first annular portion; two water baffles (51) are provided, and the two water baffles (51) are respectively mounted on one of the two ends of the second annular portion (523).

10. The range hood (1) according to claim 9, characterized in that: The return flow guide (52) further includes an inclined connection portion (522), the diameter of the second annular portion (523) is set to be larger than the first annular portion (521), and the inclined connection portion (522) is connected between the first annular portion (521) and the second annular portion (523).

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