Non-oil-sticking energy-saving range hood

Abstract

The invention discloses a non-oil-sticking energy-saving range hood which comprises a shell, an oil smoke suction port and an exhaust port are formed in the shell, an oil filter screen is arranged on the oil smoke suction port, a first fan is arranged in the shell, a collecting cover is arranged in the shell, and the top of the collecting cover is connected with an air inlet of the first fan through a first pipeline. An air channel is formed between the periphery of the bottom of the collecting cover and the shell, and an air inlet communicated with the air channel is formed in the shell. When the range hood runs, oil smoke enters the shell through the oil filter screen, a small amount of oil smoke still exists after the oil smoke is filtered by the oil filter screen, air without the oil smoke enters the air inlet at the same time, and the air enters the collecting cover through the air channel and occupies the position of the oil smoke, so that the oil smoke is prevented from being in contact with the side wall of the collecting cover; the oil stain condensation on the inner wall of the range hood can be effectively avoided or slowed down, so that the inner wall of the range hood does not need to be cleaned or the cleaning frequency of the inner wall of the range hood is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of range hoods, in particular to an oil-free energy-saving range hood. Background Art

[0002] Cooking fumes contain a large number of droplets and tiny solid particles, which can easily cause discomfort when inhaled by the human body, and in severe cases can even lead to disease. Therefore, during the cooking process, a range hood is needed to perform negative pressure adsorption of the fumes, and then purify them before discharging them into the atmosphere.

[0003] Existing range hoods generally include a housing, a smoke inlet is provided at the bottom of the housing, a fan for providing negative pressure is provided inside the housing, an oil filter is provided on the side of the smoke inlet, and an oil cup is provided at the bottom of the housing. During use, the fan provides negative pressure to suck smoke from the smoke inlet, and the oil filter removes most of the smoke sucked from the smoke inlet and stores it in the oil cup, and the remaining smoke is discharged to the outside through the air outlet. Although the oil filter can remove most of the smoke, there is still a small amount of smoke that cannot be completely removed. During long-term use, the inner wall of the range hood housing will slowly condense oil stains. During long-term use, the oil stains will increase, and regular cleaning is required, but the inner wall is inconvenient to clean. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an oil-free energy-saving range hood, which can effectively avoid or slow down the condensation of oil stains on the inner wall of the range hood, thereby eliminating the need to clean the inner wall of the range hood or reducing the number of times the inner wall of the range hood is cleaned.

[0005] In order to solve the above technical problems, the present invention is solved through the following technical solutions: an oil-free energy-saving range hood, comprising a shell, the shell is provided with an oil suction port and an exhaust port, the oil suction port is provided with an oil filter, a first fan is provided in the shell, a collecting hood is provided in the shell, the top of the collecting hood is connected to the air inlet of the first fan through a first pipe, an air channel is formed between the outer periphery of the bottom of the collecting hood and the shell, and the shell is provided with an air inlet connected to the air channel. When the range hood is in operation, the oil smoke enters the shell through the oil filter. A small amount of oil smoke is still contained in the oil smoke after being filtered by the oil filter. At this time, the air without oil smoke also enters the air inlet at the same time. The air enters the collecting hood through the air channel. Since the air surrounds the side wall of the collecting hood, it will occupy the position of the oil smoke and prevent the oil smoke from contacting the side wall of the collecting hood, thereby effectively preventing the oil smoke from being contaminated on the inner wall of the collecting hood. The condensation of oil stains on the inner wall of the range hood can be effectively avoided or slowed down, thereby eliminating the need to clean the inner wall of the range hood or reducing the number of times the inner wall of the range hood is cleaned.

[0006] In the above technical solution, preferably, a negative ion generator is arranged in the air passage, and the collecting cover includes an insulating layer connected to the shell and a conductive layer on the inner wall, the conductive layer is connected to the positive electrode of the power supply, and the shell is grounded. The use of this structure can make the gas entering from the air passage negatively charged after the electrons are emitted by the negative ion generator, that is, it carries negative oxygen ions. After entering the collecting cover, since the conductive layer in the collecting cover is connected to the positive electrode of the power supply, it can generate attraction for the negative oxygen ions, so the negative oxygen ions will move to the conductive layer and collide with air molecules, so that the air without oil smoke entering from the air passage can further maintain contact with the inner wall of the collecting cover, occupy the position of the gas containing oil smoke, and further improve the anti-oil effect.

[0007] In the above technical solution, preferably, the air inlet is located at the top of the air channel, and the air inlet is connected to the second fan through the second pipe. With this structure, the air is input into the air channel by the second fan actively supplying air, so that the air inlet of the air channel can be set higher, and the air inlet can be far away from the location where oil smoke is generated, so that the air entering the air inlet does not contain oil smoke.

[0008] In the above technical solution, preferably, the bottom of the shell is rectangular, and the air passage on each side gradually narrows from bottom to top, and the top of the air passage on each side is provided with the air inlet, and the air inlet is connected to the second fan through the second pipe. This structure allows the incoming air to be more evenly distributed around the collecting hood, and the inner wall of the collecting hood is more evenly protected, and the inner wall of the collecting hood is protected from contact with the oil fume gas.

[0009] In the above technical solution, preferably, the second pipe is provided with a negative ion generator with an emission end located in the second pipe, and the collecting cover includes an insulating layer connected to the shell and a conductive layer on the inner wall, the conductive layer is connected to the positive electrode of the power supply, and the shell is grounded. The use of this structure also makes the gas entering from the air channel negatively charged after the electrons are emitted by the negative ion generator, that is, it carries negative oxygen ions. After entering the collecting cover, since the conductive layer in the collecting cover is connected to the positive electrode of the power supply, it can generate attraction for the negative oxygen ions, so the negative oxygen ions will move to the conductive layer and collide with air molecules, so that the air without oil smoke entering from the air channel can further maintain contact with the inner wall of the collecting cover, occupying the position of the gas containing oil smoke, and further improving the anti-oil effect. Since the length of the second pipe can be longer, the number of negative ion generators can be increased, so that the content of negative oxygen ions is higher and the effect is better.

[0010] In the above technical solution, preferably, an atomizing nozzle is arranged in the air channel, the atomizing nozzle is connected to a DC negative electrode, the collecting cover includes an insulating layer connected to the shell and a conductive layer on the inner wall, the conductive layer is connected to the positive electrode of the power supply, a liquid recovery tank is arranged at the bottom of the collecting cover, and the shell is grounded. By adopting this structure, negatively charged atomized droplets are sprayed out from the atomizing nozzle through the action of the atomizing nozzle and the DC negative electrode. The atomized droplets are blown into the inner wall of the collecting hood along the four sides of the collecting hood by the gas entering from the air channel. Since the conductive layer is connected to the positive electrode of the power supply, the negatively charged atomized droplets are adsorbed. After the atomized droplets are adsorbed to the inner wall of the collecting hood, they flow back to the liquid recovery tank along the inner wall of the collecting hood. In the process of flowing back, the inner wall of the collecting hood is cleaned. The atomizing nozzle continues to absorb liquid from the liquid recovery tank and atomizes it. Through the impact of the atomized droplets, the air without oil smoke entering from the air channel can further maintain contact with the inner wall of the collecting hood, occupying the position of the gas containing oil smoke, thereby further improving the anti-oil effect.

[0011] In the above technical solution, preferably, the oil smoke inlet is divided into a plurality of oil smoke inlet areas by a partition, oil filters are slidably inserted into the oil smoke inlet areas on the side of the shell in a one-to-one correspondence, and doors corresponding to the plurality of oil smoke inlet areas are provided at the bottom of the shell. With this structure, each door can be opened correspondingly according to cooking needs, thereby achieving the purpose of energy saving.

[0012] In the above technical solution, preferably, one end of the door is rotatably arranged on the shell, the other end of the door is provided with a first magnet, and a second magnet cooperating with the first magnet is provided in the shell. With this structure, the door can be conveniently positioned at a position to close the oil fume suction area through the magnetic attraction of the first magnet and the second magnet.

[0013] In the above technical solution, preferably, a movable button is provided at one end of the door close to the rotating shaft, a spring is provided at the inner end of the movable button, and a protrusion is provided at the bottom of the shell, and when the door is opened, the movable button is pressed against the protrusion to position the door. This structure can be used to conveniently position the door in the open position.

[0014] In the above technical solution, preferably, the movable button is a push switch button, the push switch is electrically connected to the control circuit board, and when the push switch is turned on, the control circuit board controls the operation of the first fan, and increases the rotation speed of the first fan as the number of times the push switch is pressed increases. With this structure, the rotation speed of the first fan can be automatically adjusted by changing the number of doors opened, so that the doors are opened accordingly according to the location and amount of oil smoke generated, thereby achieving the purpose of energy saving.

[0015] Compared with the prior art, the present invention has the following beneficial effects: when the range hood is in operation, the oil smoke enters the shell through the oil filter, and a small amount of oil smoke still remains after the oil smoke is filtered through the oil filter. At this time, the air inlet also simultaneously enters the air without oil smoke, and the air enters the collecting hood through the air channel. Since the air surrounds the side wall of the collecting hood, it will occupy the position of the oil smoke and avoid the oil smoke gas from contacting the side wall of the collecting hood, thereby effectively avoiding the oil smoke from being stained on the inner wall of the collecting hood, and can effectively avoid or slow down the condensation of oil stains on the inner wall of the range hood, thereby eliminating the need to clean the inner wall of the range hood or reducing the number of times the inner wall of the range hood is cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure and airflow direction of Example 1 of the present invention.

[0018] Figure 3 for Figure 2 A partial enlarged view of .

[0019] Figure 4 This is a partial enlarged view of the connection between the door and the shell in Example 1 of the present invention.

[0020] Figure 5 This is a schematic diagram of the overall structure of Example 2 of the present invention.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure and airflow direction of Example 2 of the present invention.

[0022] Figure 7 for Figure 6 A partial enlarged view of .

[0023] Figure 8 It is a schematic diagram of the cross-sectional structure and airflow direction of Example 3 of the present invention.

[0024] Fig. 9 for Figure 8 A partial enlarged view of . DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figures 1 to 4A non-stick oil energy-saving range hood comprises a shell 1, an oil suction port 2 and an exhaust port 3 are arranged on the shell 1, an oil filter net 4 is arranged on the oil suction port 2, a first fan 5 is arranged in the shell 1, a collecting cover 6 is arranged in the shell 1, the collecting cover 6 gradually shrinks from bottom to top, the top of the collecting cover 6 is connected to the air inlet of the first fan 5 through a first pipe 7, an air channel 8 is formed between the outer periphery of the bottom of the collecting cover 6 and the shell 1, an air inlet 9 connected to the air channel 8 is arranged on the shell 1, the air inlet 9 is in a long strip shape, and a filter net is arranged on the air inlet 9. When this range hood is in operation, the oil smoke enters the shell 1 through the oil filter 4. After the oil smoke is filtered by the oil filter 4, there is still a small amount of oil smoke. At this time, the air inlet 9 also takes in air without oil smoke. The air enters the collecting hood 6 through the air channel 8. Since the air surrounds the side wall of the collecting hood 6, it will occupy the position of the oil smoke and avoid the oil smoke gas from contacting the side wall of the collecting hood 6, thereby effectively preventing the oil smoke from being contaminated on the inner wall of the collecting hood 6. It can effectively avoid or slow down the condensation of oil stains on the inner wall of the range hood, so that there is no need to clean the inner wall of the range hood or reduce the number of times the inner wall of the range hood is cleaned.

[0026] In order to further allow the air entering from the air inlet 9 to flow along the inner wall of the collecting cover 6 and prevent the air flowing in from the oil filter 4 from contacting the inner wall of the collecting cover 6, a negative ion generator 10 is provided in the air channel 8. The collecting cover 6 includes an insulating layer 11 connected to the shell 1 and a conductive layer 12 on the inner wall. The conductive layer 12 is connected to the positive electrode of the power supply, and the shell 1 is grounded. The use of this structure can make the gas entering from the air channel 8 negatively charged after the electrons are emitted by the negative ion generator 10, that is, it carries negative oxygen ions. After entering the collecting cover 6, since the conductive layer 12 in the collecting cover 6 is connected to the positive electrode of the power supply, it can generate attraction for the negative oxygen ions. Therefore, the negative oxygen ions will move to the conductive layer 12 and collide with air molecules, so that the air without oil smoke entering from the air channel 8 can further maintain contact with the inner wall of the collecting cover 6, squeeze the position of the gas containing oil smoke entering from the oil filter 4, and further improve the anti-oil effect.

[0027] In this embodiment, the oil smoke inlet 2 is divided into three oil smoke inlet areas by a partition, and oil filters 4 inserted into the oil smoke inlet areas are slidably inserted into the side of the shell 1 one by one, and doors 16 corresponding to the oil smoke inlet areas are provided at the bottom of the shell 1. With this structure, each door 16 can be opened according to cooking needs, thereby achieving the purpose of energy saving.

[0028] In this embodiment, one end of the door 16 is rotatably disposed on the housing 1, the other end of the door 16 is provided with a first magnet 17, and a second magnet 18 cooperating with the first magnet 17 is provided in the housing 1. Through the magnetic attraction of the first magnet 17 and the second magnet 18, the door 16 can be positioned at a position to close the oil fume suction area.

[0029] In this embodiment, a movable button 19 is provided at one end of the door 16 close to the rotating shaft, a spring is provided at the inner end of the movable button 19, and a protrusion 20 is provided at the bottom of the housing 1. When the door 16 is opened, the movable button 19 and the protrusion 20 are pressed to position the door 16. With this structure, the movable button 19 and the protrusion 20 are pressed to conveniently position the door 16 at the position where the oil fume suction area is opened.

[0030] In this embodiment, the active button 19 is a button of a push switch, and the push switch is electrically connected to the control circuit board. When the push switch is turned on, the control circuit board controls the operation of the first fan 5, and increases the rotation speed of the first fan 5 as the number of times the push switch is pressed increases. The control circuit board has a voltage regulation control module, and the voltage regulation control module is electrically connected to the push switch. Through the control of the voltage regulation control module, the more the push switches are turned on, the higher the power supply voltage to the first fan 5. With this structure, the rotation speed of the first fan 5 can be automatically adjusted by changing the number of doors 16 opened, so that the doors 16 are opened correspondingly according to the location and amount of oil smoke generated, thereby achieving the purpose of energy saving.

[0031] See also Figures 5 to 7 Embodiment 2, Embodiment 2 differs from Embodiment 1 in that: the air inlet 9 is located at the top of the air passage 8, and the air inlet 9 is connected to the second fan 14 through the second pipe 13. With this structure, the air is input into the air passage 8 by the second fan 14 actively supplying air, so that the air inlet 9 of the air passage 8 can be set higher, and the air inlet 9 can be kept away from the location where the oil smoke is generated, so that the air entering the air inlet 9 does not contain oil smoke.

[0032] Furthermore, the bottom of the housing 1 is rectangular, and the air passage 8 on each side gradually decreases from bottom to top, and an air inlet 9 is provided at the top of the air passage 8 on each side, and the air inlet 9 is connected to the second fan 14 through the second pipe 13, and a filter is provided on the air inlet of the second fan 14. The incoming air can be more evenly distributed around the collecting cover 6, and the inner wall of the collecting cover 6 is more evenly protected, and the inner wall of the collecting cover 6 is protected from contact with the oil fume gas.

[0033] In this embodiment, the second pipe 13 is provided with a negative ion generator 10 with an emission end located in the second pipe 13, and the collecting cover 6 includes an insulating layer 11 connected to the housing 1 and a conductive layer 12 on the inner wall, the conductive layer 12 is connected to the positive electrode of the power supply, and the housing 1 is grounded. The use of this structure also makes the gas entering from the air channel 8 negatively charged after the negative ion generator 10 emits electrons, that is, it carries negative oxygen ions. After entering the collecting cover 6, since the conductive layer 12 in the collecting cover 6 is connected to the positive electrode of the power supply, it can generate attraction for the negative oxygen ions, so the negative oxygen ions will move to the conductive layer 12 and collide with air molecules, so that the air without oil smoke entering from the air channel 8 can further maintain contact with the inner wall of the collecting cover 6, occupying the position of the gas containing oil smoke, and further improving the anti-oil effect. Since the length of the second pipe 13 can be longer, the number of negative ion generators 10 can be increased, so that the content of negative oxygen ions is more and the effect is better.

[0034] See also Figure 8 and Fig. 9 Embodiment 3, the difference between Embodiment 3 and Embodiment 1 is that: an atomizing nozzle 21 is arranged in the air channel 8, the atomizing nozzle 21 is connected to the DC negative electrode, the collecting cover 6 includes an insulating layer 11 connected to the shell 1 and a conductive layer 12 on the inner wall, the conductive layer 12 is connected to the positive electrode of the power supply, and a liquid recovery tank 15 is arranged at the bottom of the collecting cover 6. The liquid recovery tank 15 is annular and cooperates with the opening at the bottom of the collecting cover 6, and the shell 1 is grounded. By adopting this structure, negatively charged atomized droplets are sprayed out from the atomizing nozzle 21 through the action of the atomizing nozzle 21 and the DC negative electrode. The atomized droplets are blown by the gas entering from the air channel 8 along the four sides of the collecting hood 6 and enter the inner wall of the collecting hood 6. Since the conductive layer 12 is connected to the positive electrode of the power supply, it will adsorb the negatively charged atomized droplets. After the atomized droplets are adsorbed to the inner wall of the collecting hood 6, they flow back to the liquid recovery tank 15 along the inner wall of the collecting hood 6. In the process of flowing back, the inner wall of the collecting hood 6 is also cleaned. The liquid inlet pipe of the atomizing nozzle 21 is connected to the liquid recovery tank 15, and the atomizing nozzle 21 continues to absorb liquid from the liquid recovery tank 15. Through the impact of the atomized droplets, the air without oil smoke entering from the air channel 8 can further maintain contact with the inner wall of the collecting hood 6, occupying the position of the gas containing oil smoke, and further improving the anti-oil effect.

[0035] In the above embodiments, in order to prevent the air channel 8 from absorbing negative oxygen ions and charged atomized droplets, the inner wall of the air channel 8 may be provided with a charged protective cover insulated from the shell and connected to the negative pole of the power supply. The adsorption of negative oxygen ions and charged atomized droplets is avoided by repelling each other at the same level.

[0036] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An oil-free energy-saving range hood, comprising a housing (1), the housing (1) being provided with an oil smoke suction port (2) and an exhaust port (3), the oil smoke suction port (2) being provided with an oil filter (4), the housing (1) being provided with a first fan (5), characterized in that: A collecting hood (6) is arranged inside the shell (1); the top of the collecting hood (6) is connected to the air inlet of the first fan (5) via a first pipe (7); an air passage (8) is formed between the outer periphery of the bottom of the collecting hood (6) and the shell (1); and an air inlet (9) connected to the air passage (8) is arranged on the shell (1).

2. The oil-free energy-saving range hood according to claim 1, characterized in that: A negative ion generator (10) is arranged in the air passage (8); the collecting cover (6) comprises an insulating layer (11) connected to the shell (1) and a conductive layer (12) on the inner wall; the conductive layer (12) is connected to the positive pole of the power supply; and the shell (1) is grounded.

3. The oil-free energy-saving range hood according to claim 1, characterized in that: The air inlet (9) is located at the top of the air channel (8), and the air inlet (9) is connected to a second fan (14) via a second pipeline (13).

4. The oil-free energy-saving range hood according to claim 3, characterized in that: The bottom of the housing (1) is rectangular, and the air passage (8) on each side gradually narrows from bottom to top. The top of the air passage (8) on each side is provided with an air inlet (9), and the air inlet (9) is connected to a second fan (14) via a second pipe (13).

5. The oil-free energy-saving range hood according to claim 3 or 4, characterized in that: The second pipe (13) is provided with a negative ion generator (10) with an emission end located inside the second pipe (13); the collecting cover (6) comprises an insulating layer (11) connected to the shell (1) and a conductive layer (12) on the inner wall; the conductive layer (12) is connected to the positive pole of a power supply; and the shell (1) is grounded.

6. The oil-free energy-saving range hood according to claim 1, characterized in that: An atomizing nozzle (21) is arranged in the air passage (8), and the atomizing nozzle (21) is connected to a DC negative electrode. The collecting cover (6) comprises an insulating layer (11) connected to the shell (1) and a conductive layer (12) on the inner wall, and the conductive layer (12) is connected to the positive electrode of the power supply. A liquid recovery tank (15) is arranged at the bottom of the collecting cover (6), and the shell (1) is grounded.

7. The oil-free energy-saving range hood according to any one of claims 1 to 6, characterized in that: The oil fume intake port (2) is divided into a plurality of oil fume intake areas by a partition, oil filter nets (4) are slidably inserted into the oil fume intake areas in a one-to-one correspondence manner on the side of the shell (1), and doors (16) are provided at the bottom of the shell (1) in a one-to-one correspondence manner with the plurality of oil fume intake areas.

8. The oil-free energy-saving range hood according to claim 7, characterized in that: One end of the door (16) is rotatably mounted on the shell (1), the other end of the door (16) is provided with a first magnet (17), and a second magnet (18) cooperating with the first magnet (17) is provided inside the shell (1).

9. The oil-free energy-saving range hood according to claim 7, characterized in that: An active button (19) is provided at one end of the door (16) close to the rotating shaft, a spring is provided at the inner end of the active button (19), and a protrusion (20) is provided at the bottom of the housing (1); when the door (16) is opened, the active button (19) is pressed against the protrusion (20) to position the door (16).

10. The oil-free energy-saving range hood according to claim 9, characterized in that: The movable button (19) is a push switch button, the push switch is electrically connected to a control circuit board, and when the push switch is turned on, the control circuit board controls the operation of the first fan (5), and increases the rotation speed of the first fan (5) as the number of times the push switch is pressed increases.

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