Device for preventing odor tainting of kitchen flue

Abstract

The utility model discloses a device for preventing odor tainting of a kitchen flue, which comprises a box body and a driving mechanism, the box body is arranged at the top of a range hood, an annular water seal tank is formed at the bottom of the box body, a lower exhaust passage is formed in the middle of the annular water seal tank, and the lower exhaust passage is communicated with an exhaust hole at the top of the range hood. An upper exhaust channel connected with the smoke exhaust pipe is formed in the top of the box body and communicates with an inner cavity of the box body. A water seal cover capable of moving up and down in the axial direction is arranged on the annular water seal tank, the water seal cover moves downwards so that air between the lower exhaust channel and the inner cavity can be blocked through water in the annular water seal tank, and the water seal cover moves upwards so that air blocking between the lower exhaust channel and the inner cavity can be removed; the driving mechanism is arranged in the inner cavity and connected with the top of the water seal cover so as to drive the water seal cover to move up and down in the axial direction. According to the utility model, the water seal structure is arranged on the smoke exhaust channel of the range hood, so that the sealing performance of the smoke exhaust channel is improved, and oil smoke in a flue can be prevented from entering a room.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen and bathroom furniture, in particular to a device for preventing odor from entering a kitchen flue. Background Art

[0002] The range hood is an exhaust device installed above the kitchen gas stove. The exhaust outlet of the range hood is connected to the exhaust duct through the exhaust pipe, and the smoke is exhausted to the outside through the flue. For multi-story or high-rise residential buildings, in order to prevent the smoke from flowing through the flue on each floor under the action of reverse wind pressure, a check valve is usually installed at the place where the exhaust pipe is connected to the flue. Sometimes, in order to enhance the check effect, a check valve can be repeatedly installed at the range hood and the air outlet. When the check valve is opened, the smoke is discharged unimpeded through the indoor exhaust flue and the public flue in turn. When the check valve is closed, the smoke from the public flue cannot enter the room.

[0003] However, the above-mentioned check valve is a mechanical seal, and it is difficult to achieve a completely airtight seal when closed, especially when there is a lot of oil pollution during use, which makes it easier for the check valve flap to close loosely, thus causing smoke backflow. In real life, kitchen odor backflow is everywhere, and no matter what material or brand of check valve the owner replaces, it cannot solve the fundamental problem.

[0004] In view of this, the inventor proposed a device for preventing kitchen smoke odor from entering the kitchen duct with better sealing effect, and this case was thus created. Utility Model Content

[0005] The utility model aims to provide a device for preventing odor from entering the kitchen flue, by arranging a water seal structure on the smoke exhaust passage of the range hood to improve the sealing of the smoke exhaust passage between the range hood and the smoke exhaust pipe, and to prevent the oil smoke in the flue from entering the room.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] The utility model provides a device for preventing kitchen smoke from entering the kitchen, comprising:

[0008] A box body is mounted on the top of the range hood, an annular water seal groove is formed at the bottom of the box body, a lower exhaust channel is formed in the middle of the annular water seal groove, the lower exhaust channel is communicated with the exhaust hole at the top of the range hood, an upper exhaust channel connected to the exhaust pipe is formed at the top of the box body, the upper exhaust channel is communicated with the inner cavity of the box body; a water seal cover which can move up and down in the axial direction is provided on the annular water seal groove, the water in the annular water seal groove can be used to block the air between the lower exhaust channel and the inner cavity when the water seal cover moves down, and the air blockage between the lower exhaust channel and the inner cavity can be released when the water seal cover moves up;

[0009] A driving mechanism is arranged in the inner cavity and connected to the top of the water seal cover to drive the water seal cover to move up and down along the axial direction.

[0010] Furthermore, the box body is composed of a bottom plate, a side plate and a top plate. The bottom of the bottom plate is open, and a cylindrical partition is arranged at the opening position facing the inner cavity. The annular water seal groove is formed between the partition and the side plate, and the lower exhaust channel is formed in the middle of the partition; the water seal cover can move downward to cover the top and the outer periphery of the partition, and the lower end of the water seal cover enters the water in the annular water seal groove to block the air between the lower exhaust channel and the inner cavity.

[0011] Furthermore, sealing gaskets are provided between the bottom plate and the top of the range hood, and between the top plate and the side plates.

[0012] Furthermore, the driving mechanism includes a guide rod, an elastic part, an electromagnet, and a fixed bracket. The electromagnet is installed in the inner cavity through the fixed bracket. A limit hole is provided in the center of the electromagnet. The lower end of the guide rod is connected to the top of the water seal cover, and the upper end of the guide rod passes through the limit hole. The top of the water seal cover has a metal component. The elastic part is provided between the top of the water seal cover and the electromagnet. When the electromagnet is energized, the magnetic attraction force provided to the water seal cover by the electromagnet is greater than the sum of the water seal cover's own gravity and the elastic part's rebound force, so that the water seal cover moves upward.

[0013] Furthermore, the water seal cover is composed of a main body made of a light non-metallic material and a top made of a metallic material.

[0014] Furthermore, the elastic member is a spring, the electromagnet is an electromagnet, the fixed bracket is a hollow structure, and the driving mechanism also includes an electric wire, which is arranged inside the fixed bracket and connects the electromagnet to the fan power supply of the range hood.

[0015] Furthermore, the device also includes a water supply and drainage mechanism, which includes a water supply plug, a water supply pipe, a water supply hose, a drain pipe, a drain hose, and a drain plug. The water supply pipe is vertically penetrated through the top of the box, and the water supply plug is installed at the outer end of the water supply pipe; the water supply hose is arranged along the inner wall of the box, and the upper end of the water supply hose is connected to the inner end of the water supply pipe, and the lower end of the water supply hose enters the water in the annular water seal groove; the drain pipe is vertically penetrated through the bottom of the box and the top of the range hood, or is horizontally penetrated through the side wall of the box, and the inner end of the drain pipe is connected to the annular water seal groove, the drain hose is arranged along the inner wall or outer wall of the range hood, and the upper end of the drain hose is connected to the outer end of the drain pipe, and the drain plug is installed at the other end of the drain hose.

[0016] Furthermore, an observation window is provided on the side of the box.

[0017] Furthermore, the top of the box body protrudes upward to form a connecting pipe having the upper exhaust channel, and the smoke exhaust pipe is sleeved on the connecting pipe.

[0018] After adopting the above technical solution, the working principle and beneficial effects of the device for preventing kitchen smoke odor from entering the kitchen are as follows:

[0019] Before use, a certain amount of water needs to be injected into the annular water seal groove at the bottom of the box;

[0020] When the fan of the range hood is started, the driving mechanism is started at the same time. After the driving mechanism is started, it provides driving force to make the water seal cover move upward in the axial direction. The upward movement of the water seal cover can release the air barrier between the lower exhaust channel and the inner cavity, so that the oil fume gas collected by the range hood is discharged into the exhaust pipe through the exhaust hole, the lower exhaust channel, the inner cavity, and the upper exhaust channel in sequence, and finally discharged into the outdoor flue;

[0021] When the fan of the range hood is turned off, the driving mechanism is also turned off. After the driving mechanism is turned off, the driving force is released, and the water seal cover moves downward in the axial direction with the help of its own gravity. The downward movement of the water seal cover can block the air between the lower exhaust channel and the inner cavity through the water in the annular water seal groove, thereby achieving a water seal effect.

[0022] The device for preventing kitchen flue odor from entering the room can ensure the normal operation of the range hood. After the range hood stops working, a water seal can be achieved between the outdoor flue and the indoor space. The water seal replaces the traditional mechanical seal, thereby fundamentally improving the sealing performance of the "check valve" in the exhaust pipe channel, preventing the oil smoke in the flue from entering the room, and achieving the effect of preventing odor from entering the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional structure diagram of a device for preventing kitchen smoke odor from entering the kitchen according to the utility model;

[0024] Figure 2 It is a schematic diagram of the flow direction of oil smoke of a device for preventing kitchen smoke from entering the kitchen duct according to the utility model when the range hood is in working state;

[0025] Figure 3 It is a schematic diagram of the flow direction of oil smoke of a device for preventing kitchen smoke from entering the kitchen duct according to the utility model when the range hood is not in operation;

[0026] Figure 4 This is a schematic diagram of an observation window of a device for preventing kitchen smoke odor from entering the kitchen according to the utility model;

[0027] Figure 5 It is a three-dimensional cross-sectional view of a device for preventing kitchen smoke odor from entering the kitchen according to the utility model.

[0028] Description of symbols

[0029] Range hood 10, exhaust vent 11

[0030] Box body 20, annular water seal groove 21, lower exhaust channel 22, water seal cover 23, upper exhaust channel 24, inner cavity 25, bottom plate 26, side plate 27, top plate 28, observation window 210, connecting pipe 220, smoke exhaust pipe 30, driving mechanism 40, guide rod 41, elastic member 42, electromagnet 43, limiting hole 431, fixing bracket 44, electric wire 45, water supply and drainage mechanism 50, water supply plug 51, water supply pipe 52, water supply hose 53, drain pipe 54, drain hose 55, drain plug 56, sealing gasket 60, fixing screw 70. DETAILED DESCRIPTION

[0031] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-5 As shown, the embodiment of the utility model discloses a device for preventing kitchen smoke odor from entering the kitchen, which includes a box body 20 and a driving mechanism 40;

[0033] The box body 20 is installed on the top of the range hood 10, and an annular water seal groove 21 is formed at the bottom of the box body 20, and a lower exhaust channel 22 is formed in the middle of the annular water seal groove 21. The lower exhaust channel 22 is communicated with the exhaust hole 11 at the top of the range hood 10, and an upper exhaust channel 24 connected to the smoke exhaust pipe 30 is formed on the top of the box body 20. The upper exhaust channel 24 is communicated with the inner cavity 25 of the box body 20; a water seal cover 23 that can move up and down in the axial direction is provided on the annular water seal groove 21, and the water in the annular water seal groove 21 can be used to block the air between the lower exhaust channel 22 and the inner cavity 25 when the water seal cover 23 moves downward, and the air blockage between the lower exhaust channel 22 and the inner cavity 25 can be released when the water seal cover 23 moves upward;

[0034] The driving mechanism 40 is disposed in the inner cavity 25 and connected to the top of the water seal cover 23 to drive the water seal cover 23 to move up and down along the axial direction.

[0035] The working principle of the device for preventing kitchen smoke odor from entering the kitchen duct proposed in this embodiment is as follows:

[0036] Before use, a certain amount of water needs to be injected into the annular water seal groove 21 at the bottom of the box body 20;

[0037] When the fan of the range hood is started, the driving mechanism 40 is started at the same time, and the water seal cover 23 moves upward in the axial direction under the combined action of the wind pressure and the driving force provided by the driving mechanism 40 after starting. The upward movement of the water seal cover 23 can release the air barrier between the lower exhaust channel 22 and the inner cavity 25, so that the oil fume gas collected by the range hood 10 is discharged into the exhaust pipe 30 through the exhaust hole 11, the lower exhaust channel 22, the inner cavity 25, and the upper exhaust channel 24 in sequence, and finally discharged into the outdoor flue;

[0038] When the fan of the range hood is turned off, the driving mechanism 40 is turned off at the same time. After the driving mechanism 40 is turned off, the driving force is released, and the water seal cover 23 moves downward in the axial direction by virtue of its own gravity. The downward movement of the water seal cover 23 can block the air between the lower exhaust channel 22 and the inner cavity 25 through the water in the annular water seal groove 21, thereby achieving a water seal effect.

[0039] The device for preventing kitchen flue odor from entering the room can ensure the normal operation of the range hood 10, and realize water-sealed air barrier between the outdoor flue and the indoor space after the range hood 10 stops working. The water seal is replaced by a traditional mechanical seal, and the sealing performance of the "check valve" in the exhaust pipe channel is fundamentally improved, thereby preventing the oil smoke in the flue from entering the room and achieving the effect of preventing odor from entering the room.

[0040] As a further preferred embodiment, the above-mentioned box body 20 is composed of a bottom plate 26, a side plate 27 and a top plate 28. The bottom of the bottom plate 26 is open, and a cylindrical partition is arranged at the opening position toward the inner cavity 25. The annular water seal groove 21 is formed between the partition and the side plate 27, and the lower exhaust channel 22 is formed in the middle of the partition; the water seal cover 23 is moved downward to cover the top and the outer periphery of the partition, and the lower end of the water seal cover 23 enters the water in the annular water seal groove 21, so that air isolation is achieved between the lower exhaust channel 22 and the inner cavity 25.

[0041] In order to further improve the sealing performance inside the box body 20 , sealing gaskets 60 are preferably provided between the bottom plate 26 and the top of the range hood 10 , and between the top plate 28 and the side plate 27 , and the bottom plate 26 and the top of the range hood 10 , and between the top plate 28 and the side plate 27 are fixed by fixing screws 70 .

[0042] In this embodiment, the driving mechanism 40 includes a guide rod 41, an elastic member 42, an electromagnet 43, and a fixed bracket 44. The electromagnet 43 is installed in the inner cavity 25 through the fixed bracket 44. A limiting hole 431 is provided at the center of the electromagnet 43. The lower end of the guide rod 41 is connected to the top of the water seal cover 23, and the upper end of the guide rod 41 passes through the limiting hole. The top of the water seal cover 23 has a metal component. The elastic member 42 is arranged between the top of the water seal cover 23 and the electromagnet 43. When the power is turned on, the magnetic attraction force provided by the electromagnet 43 to the water seal cover 23 is greater than the sum of the gravity of the water seal cover 23 itself and the rebound force of the elastic member 42, so that the water seal cover 23 moves upward. Further preferably, the elastic member 42 is preferably a spring, the electromagnet 43 is an electromagnet, the fixed bracket 44 is a hollow structure, and the driving mechanism 40 also includes an electric wire 45, which is arranged inside the fixed bracket 44, and the electric wire 45 connects the electromagnet 43 to the fan power supply of the range hood 10, and the threading point of the electric wire 45 needs to be strictly sealed to avoid air leakage.

[0043] When the driving mechanism 40 adopting the above structure works, its principle is as follows:

[0044] like Figure 2 As shown, when smoke exhaust is required, the user starts the range hood 10, and the electromagnet is powered while the fan is running, and the electromagnet generates magnetism. The water seal cover 23 moves upward under the action of wind pressure. During the movement, the guide rod 41 can limit the position of the guide rod 41 along the limit hole 431 to ensure that it slides up and down smoothly, compresses the spring, and is adsorbed by the electromagnet due to the action of magnetic force, so as to be fixed on the electromagnet. After the water seal cover 23 is adsorbed by the electromagnet, there is no obstacle between it and the water surface in the annular water seal groove 21, and the exhaust channel 22 is directly connected to the inner cavity 25. The oil smoke exhausted by the range hood 10 can pass through the exhaust hole 11, the lower exhaust channel 22, the inner cavity 25, and the upper exhaust channel 24 unimpeded and discharged into the exhaust pipe 30, and finally discharged into the outdoor flue, thereby achieving the purpose of smoke exhaust;

[0045] like Figure 3 As shown, when the range hood is turned off, the fan stops running, the electromagnet loses power and loses its magnetism, and the water seal cover 23 moves downward under the action of its own gravity and the elastic restoring force of the spring, falls into the annular water seal groove 21, and the bottom is inserted into the water to form a water seal, isolating the air in the flue (inner cavity 25, upper exhaust channel 24, exhaust pipe 30 and outdoor flue) and indoor (exhaust hole 11, lower exhaust channel 22 and kitchen space). Once reverse wind pressure is formed in the outdoor flue, outdoor oil smoke cannot enter the room due to the barrier of water, thereby achieving the purpose of preventing odor from entering the room.

[0046] Further preferably, in order to reduce the weight of the water seal cover 23 and make it easier for the electromagnet 43 to magnetically attract the water seal cover 23 to move upward, the water seal cover 23 is composed of a main body of a light non-metallic material and a top of a metal material, such as a main body of a plastic material and a top of a metal (iron, alloy, etc.) material.

[0047] Since the water in the annular water seal groove 21 will evaporate after a certain period of use and will be polluted by the accumulation of oil smoke, it is necessary to supply water and drain water. The device for preventing kitchen smoke from entering the kitchen duct in this embodiment is also provided with a water supply and drainage mechanism 50, such as Figures 1 to 3 As shown, the water supply and drainage mechanism includes a water supply plug 51, a water supply pipe 52, a water supply hose 53, a drainage pipe 54, a drainage hose 55, and a drainage plug 56. The water supply pipe 52 is vertically penetrated at the top of the box body 20, and the water supply plug 51 is installed at the outer end of the water supply pipe 52; the water supply hose is arranged along the inner wall of the box body 20, and the upper end of the water supply hose 53 is connected to the inner end of the water supply pipe 52, and the lower end of the water supply hose 53 enters the water in the annular water seal groove 21; the drainage pipe 54 is vertically penetrated at the bottom of the box body 20 and the top of the range hood 10, or is horizontally penetrated at the side wall of the box body 20, and the inner end of the drainage pipe 54 is connected to the annular water seal groove 21, the drainage hose 55 is arranged along the inner wall or outer wall of the range hood 10, and the upper end of the drainage hose 55 is connected to the outer end of the drainage pipe 54, and the drainage plug 56 is installed at the other end of the drainage hose 55.

[0048] When water replenishment is needed, open the water replenishment plug 51, inject water into the water replenishment pipe 52, and flow into the annular water seal groove 21 through the water replenishment hose 53. After the water filling is completed, close the water replenishment plug 51; when drainage is needed, just open the drainage plug 56, and the sewage in the annular water seal groove 21 will flow out through the drainage pipe 54 and the drainage hose 55.

[0049] like Figure 4 As shown, in order to ensure that the device continues to function, it is necessary to regularly replenish water in the annular water seal groove 21. An observation window 210 is provided on the side of the box body 20, through which observation can be made to determine whether water replenishment is needed and the amount of water replenishment. When the water quality is poor and affects the sanitation and normal operation of the device, it can be drained through the drain pipe 54 and the drain hose 55, and then re-injected with clean water. When too much water is injected, the excess water can overflow to the oil storage box of the range hood through the top of the partition. The device of the utility model can also choose to add a float valve to achieve the purpose of automatic water replenishment.

[0050] In order to facilitate the installation of the smoke exhaust pipe 30 , it is also preferred that a connecting pipe with the upper exhaust channel 24 is formed on the top of the box body 20 to protrude upward, and the smoke exhaust pipe 30 is sleeved on the connecting pipe 220 .

[0051] The above are only specific embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any equivalent changes made based on the design ideas of this case fall within the protection scope of this case.

Claims

1. A device for preventing kitchen smoke odor from entering the kitchen, characterized in that: include: A box body is mounted on the top of the range hood, an annular water seal groove is formed at the bottom of the box body, a lower exhaust channel is formed in the middle of the annular water seal groove, the lower exhaust channel is communicated with the exhaust hole at the top of the range hood, an upper exhaust channel connected to the exhaust pipe is formed at the top of the box body, the upper exhaust channel is communicated with the inner cavity of the box body; a water seal cover which can move up and down in the axial direction is provided on the annular water seal groove, the water in the annular water seal groove can be used to block the air between the lower exhaust channel and the inner cavity when the water seal cover moves down, and the air blockage between the lower exhaust channel and the inner cavity can be released when the water seal cover moves up; A driving mechanism is arranged in the inner cavity and connected to the top of the water seal cover to drive the water seal cover to move up and down along the axial direction.

2. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 1, characterized in that: The box body is composed of a bottom plate, a side plate and a top plate. The bottom of the bottom plate is open, and a cylindrical partition is arranged at the opening toward the inner cavity. The annular water seal groove is formed between the partition and the side plate, and the lower exhaust channel is formed in the middle of the partition. The water seal cover moves downward to cover the top and periphery of the partition, and the lower end of the water seal cover enters the water in the annular water seal groove to block the air between the lower exhaust channel and the inner cavity.

3. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 2, characterized in that: Sealing gaskets are arranged between the bottom plate and the top of the range hood, and between the top plate and the side plates.

4. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 1, characterized in that: The driving mechanism includes a guide rod, an elastic part, an electromagnet, and a fixed bracket. The electromagnet is installed in the inner cavity through the fixed bracket. A limit hole is provided in the center of the electromagnet. The lower end of the guide rod is connected to the top of the water seal cover, and the upper end of the guide rod passes through the limit hole. The top of the water seal cover has a metal component. The elastic part is arranged between the top of the water seal cover and the electromagnet. When the electromagnet is energized, the magnetic attraction force provided to the water seal cover by the electromagnet is greater than the sum of the gravity of the water seal cover itself and the rebound force of the elastic part, so that the water seal cover moves upward.

5. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 4, characterized in that: The water seal cover is composed of a main body made of a light non-metal material and a top made of a metal material.

6. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 4, characterized in that: The elastic member is a spring, the electromagnet is an electromagnet, the fixed bracket is a hollow structure, and the driving mechanism also includes an electric wire, which is arranged inside the fixed bracket and connects the electromagnet to the fan power supply of the range hood.

7. A device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 1, characterized in that: The device also includes a water supply and drainage mechanism, which includes a water supply plug, a water supply pipe, a water supply hose, a drain pipe, a drain hose, and a drain plug. The water supply pipe is vertically penetrated through the top of the box, and the water supply plug is installed at the outer end of the water supply pipe; the water supply hose is arranged along the inner wall of the box, and the upper end of the water supply hose is connected to the inner end of the water supply pipe, and the lower end of the water supply hose enters the water in the annular water seal groove; the drain pipe is vertically penetrated through the bottom of the box and the top of the range hood, or is horizontally penetrated through the side wall of the box, and the inner end of the drain pipe is connected to the annular water seal groove, the drain hose is arranged along the inner wall or outer wall of the range hood, and the upper end of the drain hose is connected to the outer end of the drain pipe, and the drain plug is installed at the other end of the drain hose.

8. The device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 1, characterized in that: An observation window is arranged on the side of the box body.

9. The device for preventing kitchen smoke odor from entering the kitchen as claimed in claim 1, characterized in that: The top of the box body protrudes upward to form a connecting pipe with the upper exhaust channel, and the smoke exhaust pipe is sleeved on the connecting pipe.

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