CN114733311A - Fume exhauster - Google Patents

Abstract

The invention discloses a range hood, and relates to the technical field of kitchen electricity. The range hood comprises an outer cover and a gas-liquid separation assembly. The outer cover is provided with an air suction port; the gas-liquid separation assembly comprises a box body, a baffle and a separation liquid, wherein the baffle and the separation liquid are arranged in the box body, the baffle divides the box body into a first cavity and a second cavity which are arranged left and right, a channel is formed between the lower end of the baffle, which is arranged below the liquid level of the separation liquid, and the bottom surface of the box body, the first cavity is communicated with the second cavity through the channel, the box body is provided with an air inlet communicated with the first cavity and an air outlet communicated with the second cavity, and the formed clean gas is discharged from the outer cover after the oil smoke mixture entering from the air suction port sequentially passes through the air inlet, the channel and the air outlet. This lampblack absorber can effectively separate the oil smoke, prevents that the oil smoke from getting into the public line and causing the public line greasy, guarantees the cleanness of public line, reduces the conflagration hidden danger, prevents to cause atmospheric pollution.

Description

Fume exhauster

Technical Field

The invention relates to the technical field of kitchen electricity, in particular to a range hood.

Background

With the continuous improvement of the quality of life of people at present, the influence of the oil smoke in the kitchen on the body health of users and the environmental safety becomes the key point of attention of people, so that the range hood becomes one of indispensable kitchen household appliances in modern families. The range hood works by utilizing the fluid dynamics principle, and reduces the oil smoke content of indoor air by sucking and exhausting oil smoke through the suction assembly.

The oil smoke sucked by the range hood is condensed in the public pipeline to cause the public pipeline to be greasy, a fire disaster is easily caused, potential safety hazards exist, and meanwhile, the atmosphere pollution is caused when the smoke is discharged outdoors. In order to solve the problem, the range hood is generally provided with a box body for containing separation liquid, oil smoke is introduced below the liquid level of the separation liquid to be dissolved in the separation liquid, and the smoke gas enters a public pipeline through an exhaust port of the box body after rising, so that the cleanness of the public pipeline is ensured.

However, the oil smoke will rise rapidly to separate from the separation liquid after entering the separation liquid, resulting in that part of the oil gas is not dissolved in the separation liquid, so that the discharged smoke contains part of the oil gas, and the oil smoke separation effect is poor.

To solve the above problems, a range hood needs to be developed to solve the problem of poor oil-smoke separation effect when oil smoke passes through a separation liquid.

Disclosure of Invention

The invention aims to provide a range hood which can effectively separate oil smoke, prevent the oil smoke from entering a public pipeline to cause greasiness of the public pipeline, ensure the cleanness of the public pipeline, reduce fire hazard and prevent atmosphere pollution.

In order to achieve the purpose, the invention adopts the following technical scheme:

a range hood, comprising:

the outer cover is provided with an air suction port;

the gas-liquid separation assembly comprises a box body, a baffle and separation liquid, wherein the baffle and the separation liquid are arranged in the box body, the baffle divides the box body into a first cavity and a second cavity which are arranged in the left and right directions, the lower end of the baffle is arranged below the liquid level of the separation liquid and forms a channel with the bottom surface of the box body, the first cavity is communicated with the second cavity through the channel, the box body is provided with an air inlet communicated with the first cavity and an air outlet communicated with the second cavity, and after oil smoke mixture entering from an air suction port sequentially passes through the air inlet, the channel and the air outlet, formed clean gas is discharged from the outer cover.

Preferably, the baffle from top to bottom towards keeping away from the direction slope of air inlet, the air inlet is located the below of baffle.

Preferably, the gas-liquid separation assembly further includes:

the liquid inlet pipe is communicated with the interior of the box body and is positioned above the liquid level of the separation liquid;

the liquid discharge pipe is communicated with the bottom surface of the box body; and

the liquid inlet pipe and the liquid discharge pipe are both provided with the valve body.

Preferably, the range hood further comprises a suction assembly comprising:

one end of the flow guide pipe is communicated with the air inlet;

the outlet of the nozzle is opposite to the other end of the flow guide pipe and is arranged at intervals;

the two ends of the pipeline are respectively communicated with the bottom of the box body and the nozzle;

a pump body disposed on the pipeline.

Preferably, the end of the draft tube opposite to the outlet of the nozzle is higher than the liquid level of the separation liquid.

Preferably, the flow guide tube is a venturi tube.

Preferably, the nozzle is provided with a plurality of outlets.

Preferably, the suction port includes:

a plurality of first air inlets, from top to bottom interval arrangement, first air inlet is for following the rectangular hole that the horizontal direction extends, and is a plurality of the width of first air inlet is along increasing from top to bottom in proper order.

Preferably, the suction port includes:

the second air suction port is a long hole extending along the up-down direction, and the width of the second air suction port is gradually increased from top to bottom.

Preferably, the housing comprises:

the air suction port is arranged on the back plate;

the collection petticoat pipe, the collection petticoat pipe with the backplate pin joint works as the collection petticoat pipe is relative during backplate to open mode, the backplate with the collection petticoat pipe forms jointly and holds together the cigarette region.

The invention has the beneficial effects that:

the invention provides a range hood. The gas-liquid separation assembly of the range hood comprises a box body, a baffle and a separation liquid, wherein the baffle and the separation liquid are arranged in the box body, the baffle divides the box body into a first cavity and a second cavity which are distributed from left to right, the lower end of the baffle is located below the liquid level of the separation liquid and forms a channel with the bottom surface of the box body, and the first cavity and the second cavity are communicated through the channel. When the range hood starts to work, oil smoke starts to be sucked through the air suction port, and clean gas formed by the air inlet, the channel and the exhaust port in sequence is exhausted from the outer cover. Because the oil smoke mixture flows downwards along the baffle firstly and then flows upwards by bypassing the baffle, the flow path of the oil smoke in the separation liquid is greatly increased, and the flow time is prolonged, so that the oil smoke can be fully dissolved in the separation liquid, and the smoke rises in the separation liquid and then is discharged into a public pipeline through the exhaust port.

This lampblack absorber has prolonged the flow path of oil smoke in the separating medium, has just also increased the volume and the solution time with oil gas direct contact's separating medium, can effectively dissolve oil gas to the separation oil smoke prevents that the oil smoke from getting into the public line and causing the public line greasy, guarantees the cleanness of public line, reduces the conflagration hidden danger, prevents to cause the atmosphere pollution.

Drawings

FIG. 1 is a front view of a range hood provided by the present invention;

fig. 2 is a side view of a range hood provided by the present invention.

In the figure:

1. a housing; 11. a back plate; 111. a first air intake port; 112. a second air suction port; 12. a smoke collecting hood; 121. a smoke baffle; 122. a base plate; 123. a side plate; 13. an accommodating box; 14. a smoke gathering area; 2. a gas-liquid separation module; 21. a box body; 211. an air inlet; 212. an exhaust port; 213. a first chamber; 214. a second chamber; 215. a channel; 22. a baffle plate; 23. separating the liquid; 24. a liquid inlet pipe; 25. a liquid discharge pipe; 26. a valve body; 3. a suction assembly; 31. a flow guide pipe; 32. a nozzle; 33. a pipeline; 34. a pump body; 35. a support; 36. a control member; 4. a switching drive member; 5. a liquid storage part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

With the continuous improvement of the quality of life of people at present, the influence of the oil smoke in the kitchen on the health of users and the environmental safety becomes a key point of attention of people, so that the range hood becomes one of indispensable kitchen household appliances in modern families. The range hood works by utilizing the fluid dynamics principle, and the absorption of oil smoke of the external environment is realized by generating negative pressure inside the range hood, so that the oil smoke content of indoor air is reduced.

As shown in fig. 1, the range hood comprises an outer cover 1, a gas-liquid separation component 2 and a suction component 3, wherein an air suction port is formed in the outer cover 1, negative pressure can be generated when the suction component 3 is opened, oil smoke enters the outer cover 1 through the air suction port, and finally is discharged and enters a public pipeline after passing through the gas-liquid separation component 2, so that the indoor air is clean.

The oil smoke sucked by the range hood is condensed in the public pipeline to cause the public pipeline to be greasy, a fire disaster is easily caused, potential safety hazards exist, and meanwhile, the atmosphere pollution is caused when the smoke is discharged outdoors. In the prior art, oil gas is treated by simple filtration mainly through the centrifugal action of a filter screen and a fan, although a user can simply clean the filter screen, the inside of a range hood is difficult to clean, and after the range hood device runs for a long time, the accumulated oil of an impeller of the internal fan and a volute is serious, so that the smoking effect is influenced and vicious circle is caused.

For improving the filtering effect, and be convenient for the user to clear up, the gas-liquid separation subassembly 2 of current lampblack absorber is provided with the box 21 of splendid attire parting fluid 23 usually, lets in the oil smoke below the liquid level of parting fluid 23, makes oil-gas dissolve in parting fluid 23, and the gas vent 212 through box 21 gets into public pipeline after the flue gas rises to guarantee the cleanness of public pipeline.

However, the oil smoke will quickly rise to the separation liquid 23 after entering the separation liquid 23, that is, the separation liquid 23 contacting the oil smoke is less, and most of the other separation liquid 23 will not directly contact the oil smoke, so that part of the oil gas will not be dissolved in the separation liquid 23, and the exhaust smoke will contain part of the oil gas, and the oil smoke separation effect is poor.

In order to solve the problem, the embodiment provides the range hood. As shown in fig. 1, the gas-liquid separation assembly 2 of the range hood further includes a baffle 22 disposed in the box body 21, the baffle 22 divides the box body 21 into a first chamber 213 and a second chamber 214 which are arranged in a left-right direction, a lower end of the baffle 22 is disposed below the liquid level of the separation liquid 23 and forms a channel 215 with the bottom surface of the box body 21, the first chamber 213 is communicated with the second chamber 214 through the channel 215, the box body 21 is provided with an air inlet 211 communicated with the first chamber 213 and an air outlet 212 communicated with the second chamber 214, and after the oil smoke mixture entering from the air inlet passes through the air inlet 211, the channel 215 and the air outlet 212 in sequence, the formed clean gas is exhausted from the housing 1.

The gas-liquid separation assembly 2 of the range hood comprises a box body 21, a baffle plate 22 and separation liquid 23, wherein the baffle plate 22 and the separation liquid 23 are arranged in the box body 21, the baffle plate 22 divides the box body 21 into a first chamber 213 and a second chamber 214 which are arranged left and right, the lower end of the baffle plate 22 is located below the liquid level of the separation liquid 23 and forms a channel 215 with the bottom surface of the box body 21, and the first chamber 213 and the second chamber 214 are communicated through the channel 215. When the range hood starts to work, oil smoke starts to be sucked through the air suction port, and clean air formed by the air inlet 211, the channel 215 and the air outlet 212 in sequence is exhausted from the outer cover 1. Because the oil smoke mixture flows downwards along the baffle 22 and then flows upwards by bypassing the baffle 22, the flow path of the oil smoke in the separation liquid 23 is greatly increased, and the flow time is prolonged, so that the oil smoke can be fully dissolved in the separation liquid 23, and the smoke rises in the separation liquid 23 and then is discharged into a common pipeline through the exhaust port 212.

This lampblack absorber has prolonged the flow path of oil smoke in parting liquid 23, has just also increased the volume and the solution time with oil gas direct contact's parting liquid 23, can effectively dissolve oil gas to the separation oil smoke prevents that the oil smoke from getting into the public line and causing the public line greasy, guarantees the cleanness of public line, reduces the conflagration hidden danger, prevents to cause atmospheric pollution. And gas-liquid separation subassembly 2 can also play the effect of check valve simultaneously, can effectively prevent through the liquid seal that the flue gas from flowing backward, can also completely cut off flame and heat when public pipeline takes place the conflagration simultaneously, prevents to stretch to the kitchen.

Preferably, as shown in fig. 1, the baffle 22 is inclined from top to bottom in a direction away from the air inlet 211, and the air inlet 211 is located below the baffle 22. The oil smoke entering the box body 21 through the air inlet 211 has a horizontal speed, so that the oil smoke can flow to the channel 215 along the baffle 22 under the guide effect of the baffle 22, and flows upwards after bypassing the baffle 22, thereby increasing the flow path of the oil smoke and improving the dissolving effect of the oil smoke in the separation liquid 23.

Current lampblack absorber adopts centrifugal fan form to carry out the suction of oil smoke mostly, however, because fan radius and thickness are great, cause the whole occupation space of cigarette machine device great, the structure is comparatively complicated, invades this kitchen space that just is not too abundant of accounting for easily.

As shown in fig. 1, to solve this problem, the suction assembly 3 of the range hood includes a guide pipe 31, a nozzle 32, a pipeline 33 and a pump 34, the guide pipe 31 is communicated with the air inlet 211, an outlet of the nozzle 32 is opposite to and spaced from the other end of the guide pipe 31, two ends of the pipeline 33 are respectively communicated with the bottom of the box 21 and the nozzle 32, the pump 34 is disposed on the pipeline 33, and the pump 34 can inject the separation liquid 23 into the guide pipe 31 through the nozzle 32.

When the pump 34 is operated, the separated liquid 23 in the tank 21 is pumped into the nozzle 32 through the pipe 33, enters the draft tube 31 through the nozzle 32, and reenters the tank 21 through the draft tube 31 to complete a cycle. When the separation liquid 23 flows in the draft tube 31, the gas in the draft tube 31 is pushed into the box body 21, so that the air pressure in the draft tube 31 is reduced to form negative pressure, the gas in the outer cover 1 enters the draft tube 31 under the action of the negative pressure, and the oil smoke and the air outside the outer cover 1 enter the outer cover 1 through the air suction port. The oil smoke is pumped by the nozzle 32 and the guide pipe 31, so that the structure is simple, the occupied space is small, and the noise is low.

It can be understood that, the inlet of the draft tube 31 is located at the middle position of the upper part in the housing 1, which can make the distance between the position where the negative pressure is generated and the inner parts of the housing 1 moderate, and as the oil smoke will flow and gather upwards in the housing 1, the oil smoke can enter the draft tube 31 more easily when the draft tube 31 generates the negative pressure.

As shown in fig. 1, in order to keep the nozzle 32 and the flow guide tube 31 stable, the suction assembly 3 further comprises a bracket 35, and the bracket 35 is fixedly connected with the flow guide tube 31 and the nozzle 32 respectively. The bracket 35 can ensure that the relative position and the angle between the nozzle 32 and the draft tube 31 are unchanged, thereby ensuring that the separation liquid 23 can accurately enter the draft tube 31.

As shown in fig. 1, the bracket 35 includes a plurality of connecting rods, both ends of the connecting rods are respectively fixedly connected with the duct 31 and the nozzle 32, and when the pump body 34 operates, the oil smoke enters the duct 31 through a gap between the connecting rods.

It can be understood that the suction assembly 3 further includes a control member 36, the housing 1 is provided with the accommodating box 13 therein, the box body 21 is provided in the housing 1, the accommodating box 13 and the box body 21 are symmetrically provided at two ends of the housing 1, the bracket 35 is located at a middle position between the accommodating box 13 and the box body 21, the pump body 34 and the control member 36 are both provided in the accommodating box 13, and the control member 36 is used for controlling the opening and closing of the pump body 34.

Because the outer cover 1 is filled with oil smoke, the containing box 13 can play a role in isolating the oil smoke, and plays a role in protecting the pump body 34 and the control piece 36. The housing box 13 and the box body 21 are symmetrically arranged, so that the gas in the outer cover 1 can flow stably. Because the oil smoke enters the flow guide pipe 31 from between the nozzle 32 and the flow guide pipe 31, namely enters the flow guide pipe 31 from the position of the bracket 35, the bracket 35 is positioned at the middle position between the containing box 13 and the box body 21, and the oil smoke can more easily enter the flow guide pipe 31. Specifically, the pump body 34 is a sewage pump with low sensitivity to the medium, so as to prevent the pump body 34 from being blocked by the oil and gas dissolved in the separation liquid 23.

Preferably, the end of the draft tube 31 opposite to the outlet of the nozzle 32 is higher than the liquid level of the separation liquid 23, so as to prevent the separation liquid 23 from flowing into the housing 1 from the draft tube 31 when the pump body 34 is closed, and also prevent the separation liquid 23 from flowing backwards, and form a water sealing effect, thereby achieving a good effect of isolating heat source, fire source, noise and peculiar smell.

Specifically, the draft tube 31 is a venturi tube. When the nozzle 32 sprays the separation liquid 23 into the venturi tube, the high-speed flow of the separation liquid 23 passes through the throat tube to generate low pressure at the throat tube, and at the moment, gas near the inlet of the venturi tube is sucked by the low pressure and flows out of the venturi tube together with the separation liquid 23 into the box body 21. Wherein, the Venturi tube has a longer throat and is processed into a smooth curved surface so as to further improve the capacity of absorbing the oil smoke.

Specifically, the nozzle 32 is opened with a plurality of outlets. The plurality of outlets can increase the speed of the separated liquid 23 injection, thereby improving the oil smoke absorption effect of the range hood.

As shown in fig. 1, in order to further improve the oil smoke absorption effect of the range hood, a plurality of suction assemblies 3 can be arranged in the outer cover 1, and the plurality of suction assemblies 3 share one pump body 34, so as to reduce the cost.

Preferably, the gas-liquid separation assembly 2 further includes a liquid inlet pipe 24, a liquid outlet pipe 25, and a valve body 26. The liquid inlet pipe 24 is communicated with the inside of the box body 21 and is positioned above the liquid level of the separation liquid 23, the liquid outlet pipe 25 is communicated with the bottom surface of the box body 21, and both the liquid inlet pipe 24 and the liquid outlet pipe 25 are provided with valve bodies 26.

After the range hood works for a period of time, oil gas can be retained in the separation liquid 23, which results in the reduction of the oil gas suction effect. At this time, the valve of the drain pipe 25 can be opened to drain the sewage containing oil gas, and the liquid inlet pipe 24 is opened to inject the clean separation liquid 23, thereby preventing the effect of oil gas absorption from being reduced. Preferably, a cleaning agent may be added to the separation liquid 23 to further improve the solubility of the oil and gas and the degree of cleaning.

As shown in fig. 1, the suction port includes a plurality of first suction ports 111, the plurality of first suction ports 111 are arranged at intervals from top to bottom, the first suction ports 111 are elongated holes extending along a horizontal direction, and widths of the plurality of first suction ports 111 increase from top to bottom in sequence. The long holes extending along the horizontal direction can enlarge the range of oil smoke absorption and improve the cleaning capability.

It can be understood that, during cooking, the oil smoke below is more than the oil smoke above, and the width of the first air suction port 111 increases in sequence along the direction from top to bottom, so that the flow area of the first air suction port 111 increases in sequence from top to bottom. When the suction component 3 starts working, the first air suction port 111 below can suck a large amount of oil smoke, along with the rising of the height, the oil smoke amount is less, the first air suction port 111 with a smaller opening can avoid sucking a large amount of air, distributed oil smoke suction is realized, the idle work done by the suction component 3 is reduced, the efficiency of the range hood is improved, and the noise can be reduced.

Furthermore, the outer cover 1 is internally provided with mute cotton so as to further reduce the noise generated when the range hood works.

As shown in fig. 1, the air inlet further includes a second air inlet 112, the second air inlet 112 is a long hole extending along the up-down direction, and the width of the second air inlet 112 is gradually increased from top to bottom.

The second air suction port 112 can adsorb the oil smoke when the oil smoke diffuses towards the side, so that the range hood can not effectively suck the oil smoke when the oil smoke is separated from the range of the first air suction port 111, and the oil smoke sucking effect of the range hood is improved. The opening width of the second suction port 112 is gradually increased along the direction from top to bottom, which is also for realizing distributed oil smoke suction. It is understood that, in order to further improve the oil smoke suction effect, two second suction ports 112 are provided and respectively distributed at both ends of the first suction port 111.

As shown in fig. 1 and fig. 2, the housing 1 includes a back plate 11 and a smoke collecting hood 12, the air inlet is disposed on the back plate 11, one end of the smoke collecting hood 12 is pivoted with the back plate 11, and when the smoke collecting hood 12 is opened relative to the back plate 11, the back plate 11 and the smoke collecting hood 12 jointly form a smoke collecting area 14. The smoke gathering area 14 can prevent the oil smoke from drifting upwards away from the range of the first air suction port 111 and the second air suction port 112, so that the oil smoke absorption effect of the range hood is effectively improved, and meanwhile, the problem that the oil smoke is attached to the top of a kitchen and is difficult to clean can be avoided.

Specifically, the smoke collecting hood 12 includes a smoke baffle 121, a bottom plate 122 and two side plates 123, one side of the smoke baffle 121 is pivotally connected to the back plate 11, and the other three sides of the smoke baffle 121 are sequentially connected to the side plate 123, the bottom plate 122 and the other side plate 123. The fume collecting hood 12 can collect the fume which is not sucked into the outer cover 1 when being opened relative to the back plate 11, and the fume is prevented from overflowing.

When the smoke collecting hood 12 is closed relative to the back panel 11, the first air intake port 111 and the second air intake port 112 can be shielded, and dust and other impurities can be prevented from entering the housing 1, and at this time, the bottom panel 122 and the side panel 123 are both located outside the back panel 11. Meanwhile, one outward side of the smoke baffle plate 121 forms a decorative panel, and the attractiveness of the range hood can be kept.

Preferably, the range hood further comprises an opening and closing driving piece 4, the opening and closing driving piece 4 is arranged on the outer cover 1, and the opening and closing driving piece 4 can drive the smoke collecting hood 12 to rotate so as to enable the smoke collecting hood 12 to be opened or closed.

Preferably, the bottom of the outer cover 1 is provided with an oil leakage hole, and the bottom of the outer cover 1 is detachably connected with a liquid storage part 5. It will be appreciated that part of the soot will condense on the inner wall of the outer cover 1 to form condensate, which includes oil and water, and the condensate will flow along the inner wall of the outer cover 1 to the bottom and enter the liquid reservoir 5 through the oil leak holes. The liquid storage part 5 can be kept clean only by cleaning regularly, and the use is convenient.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A range hood, comprising:

the air conditioner comprises an outer cover (1), wherein an air suction port is formed in the outer cover (1);

the gas-liquid separation component (2) comprises a box body (21), a baffle plate (22) and separation liquid (23) which are arranged in the box body, the baffle plate (22) divides the box body (21) into a first chamber (213) and a second chamber (214) which are arranged in the left and right direction, the lower end of the baffle plate (22) is arranged below the liquid level of the separation liquid (23) and forms a channel (215) with the bottom surface of the box body (21), the first chamber (213) communicates with the second chamber (214) through the passage (215), an air inlet (211) communicated with the first cavity (213) and an air outlet (212) communicated with the second cavity (214) are formed in the box body (21), and after the oil smoke mixture entering from the air inlet sequentially passes through the air inlet (211), the channel (215) and the air outlet (212), formed clean air is discharged from the outer cover (1).

2. A range hood as claimed in claim 1, wherein the baffle (22) is inclined from top to bottom in a direction away from the air inlet (211), the air inlet (211) being located below the baffle (22).

3. A hood according to claim 1, characterized in that said gas-liquid separation assembly (2) further comprises:

the liquid inlet pipe (24) is communicated with the interior of the box body (21) and is positioned above the liquid level of the separation liquid (23);

a drain pipe (25) communicating with the bottom surface of the case (21); and

the valve body (26) is arranged on the liquid inlet pipe (24) and the liquid outlet pipe (25).

4. A fume exhauster according to claim 1, further comprising a suction assembly (3), said suction assembly (3) comprising:

the flow guide pipe (31), one end of the flow guide pipe (31) is communicated with the air inlet (211);

the outlet of the nozzle (32) is opposite to the other end of the flow guide pipe (31) and is arranged at intervals;

a pipeline (33), wherein two ends of the pipeline (33) are respectively communicated with the bottom of the box body (21) and the nozzle (32);

a pump body (34), the pump body (34) being disposed on the conduit (33).

5. A range hood according to claim 4, characterized in that the end of the flow guide pipe (31) opposite to the outlet of the nozzle (32) is higher than the liquid level of the separation liquid (23).

6. A range hood according to claim 5, characterized in that the flow guide tube (31) is a venturi tube.

7. A hood as set forth in claim 4, characterized in that said nozzle (32) opens with a plurality of outlets.

8. A hood according to any of claims 1-7, characterized in that the suction opening comprises:

a plurality of first air suction ports (111), from top to bottom interval arrangement, first air suction port (111) are the rectangular hole that extends along the horizontal direction, and are a plurality of the width of first air suction port (111) increases from top to bottom in proper order.

9. A hood according to any of claims 1-7, characterized in that the suction opening comprises:

the second air suction port (112) is a long hole extending along the up-down direction, and the width of the second air suction port (112) is gradually increased from top to bottom.

10. A range hood according to any of claims 1-7, characterized in that the housing (1) comprises:

a back plate (11), wherein the air suction port is arranged on the back plate (11);

collection petticoat pipe (12), collection petticoat pipe (12) with backplate (11) pin joint works as collection petticoat pipe (12) are relative backplate (11) are when to the open mode, backplate (11) and collection petticoat pipe (12) form jointly and hold together cigarette region (14).

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