CN218672307U - Bypass air assembly and range hood - Google Patents

Abstract

The utility model discloses a bypass air component and a range hood using the bypass air component, wherein the bypass air component comprises a bypass ventilation pipe section, one end of the bypass ventilation pipe section is connected with a smoke exhaust port of a smoke exhaust fan, the other end of the bypass ventilation pipe section is provided with a pipe connecting structure, the pipe connecting structure is used for connecting a smoke exhaust pipe, the bypass ventilation pipe section is provided with a check valve and a connecting port, and the connecting port is connected with a long and thin pipeline; the utility model provides a bypass wind subassembly can introduce the air curtain subassembly and produce and exhaust air with exhausting fan's the air exhaust, can make the air curtain subassembly need not additionally use independent air curtain fan, can produce the air curtain. Therefore, the structure of the air curtain assembly and the circuit of the range hood is simplified, the equipment cost is saved, and the consumption of electric energy is saved. Other advantages of the present invention are set forth in the description that follows.

Description

Bypass air assembly and range hood

Technical Field

The utility model belongs to the technical field of range hood, concretely relates to bypass wind subassembly and range hood.

Background

The existing air curtain range hood generates an air curtain through an independent air curtain fan, so that the structure of an air curtain component is complex, and the circuit structure of the range hood is also complex. Meanwhile, the energy is consumed more, and the energy is not saved enough. The applicant designs an air curtain component which can generate an air curtain without additionally using an independent air curtain fan and by introducing exhaust air of a smoke exhaust fan, the air curtain component can simplify the structure per se and simplify the circuit structure of the smoke exhaust fan, but the air curtain component needs a bypass air component to introduce the exhaust air of the smoke exhaust fan.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a bypass wind subassembly can introduce the air curtain subassembly with exhausting fan's airing exhaust and produce and air exhaust through this kind of bypass wind subassembly, can make the air curtain subassembly need not additionally use independent air curtain fan, can produce the air curtain.

The utility model discloses a realize like this: the utility model provides a bypass wind subassembly for range hood, includes other ventilation pipeline section, other ventilation pipeline section one end is connected smoke exhaust fan's exhaust port, and the other end is provided with the takeover structure, the takeover structure is used for connecting the pipe of discharging fume, be provided with check valve and connector on the other ventilation pipeline section, the connector connection has slender pipeline.

Optionally, a second oil-smoke separation device is arranged between the connection pipe structure and the smoke exhaust port of the smoke exhaust fan, and the connection port is arranged on the downstream side of the second oil-smoke separation device.

Optionally, the second oil-smoke separation device includes a discharge electrode and an oil collection electrode, and the oil collection electrode is of a film structure or a plate structure.

Optionally, the number of the connecting ports is one or more, an outer introducing pipe inclined upwards is arranged on the outer side of each connecting port, the included angle between the outer introducing pipe and the horizontal plane ranges from 20 degrees to 80 degrees, and the connecting ports form a necking structure towards the outer introducing pipe.

Optionally, the number of the connectors is one or more, an inner introducing pipe and an outer introducing pipe are respectively arranged on the inner side and the outer side of each connector, an air inducing structure with a downward opening is arranged at one end, far away from the connectors, of each inner introducing pipe, and the air inducing structure is used for increasing the air volume passing through the connectors.

Optionally, one or more of the connectors are arranged, the slender pipeline is made of transparent hoses, the transparent hoses are connected with the connectors in a one-to-one correspondence manner, or the transparent hoses are connected with one transparent hose through a multi-way connector, and the transparent hose is connected with one connector.

The utility model provides a range hood, includes cigarette casing and bypass wind subassembly, be provided with inlet scoop and air exit on the cigarette casing, intercommunication inlet scoop and air exit form the wind channel of discharging fume, are provided with smoke exhaust fan, its characterized in that in the wind channel of discharging fume: still be provided with the guide wind gap on the cigarette machine casing, slender pipeline exhaust wind is discharged by the guide wind gap, and forms the weight of downdraft, the quilt of airing exhaust in guide wind gap the inlet scoop inhales to discharged to the air exit by smoke exhaust fan.

Optionally, an air curtain assembly is arranged in the smoke machine shell and positioned at the guide air port, the air curtain assembly comprises an air curtain shell, the air curtain shell comprises an upper air curtain cover and a lower air curtain cover which are detachably connected, an introduction port is arranged on the upper air curtain cover, and the introduction port is connected with the connecting port through a long and thin pipeline; the air curtain lower cover is provided with an air outlet, and a guide piece is arranged between the air curtain upper cover and the air curtain lower cover; and the exhaust air of the air outlet of the air curtain component is exhausted from the guide air port to form air curtain air with downward component.

Optionally, the cigarette machine shell is provided with an accommodating cavity, the accommodating cavity is communicated with the atmosphere, and a PM2.5 detection module is arranged in the accommodating cavity.

Optionally, the air suction opening is long, horizontally arranged and extended along the left and right direction; the guide air inlet is arranged on the front side of the air suction opening, the guide air inlet is also in a long strip shape and is parallel to the air suction opening, a left baffle and a right baffle are respectively arranged on the left side and the right side of the shell of the range hood, and the guide air inlet is positioned between the left baffle and the right baffle.

The utility model provides a bypass wind subassembly can introduce the air curtain subassembly and produce and exhaust air with exhausting fan's the air exhaust, can make the air curtain subassembly need not additionally use independent air curtain fan, can produce the air curtain. Therefore, the structure of the air curtain assembly and the circuit of the range hood is simplified, the equipment cost is saved, and the consumption of electric energy is saved. Other advantages of the present invention are set forth in the description that follows.

Drawings

Fig. 1 is a perspective view of a range hood according to an embodiment of the present invention;

fig. 2 is a front view of the range hood according to the embodiment of the present invention;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

fig. 5 is a perspective view of a range hood according to an embodiment of the present invention when a surrounding plate is removed;

fig. 6 is a perspective view of a range hood according to another embodiment of the present invention with the surrounding plate removed;

fig. 7 is an exploded view of an air curtain assembly according to an embodiment of the present invention;

fig. 8 is an exploded view of an air curtain assembly according to another embodiment of the present invention;

FIG. 9 is a top view of an air curtain assembly according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along line C-C of FIG. 9 when FIG. 9 is the air curtain assembly of FIG. 7;

FIG. 11 is a cross-sectional view taken along line C-C of FIG. 9 when FIG. 9 is the air curtain assembly of FIG. 8;

fig. 12 is a perspective view of a bypass air assembly in accordance with an embodiment of the present invention;

fig. 13 is a perspective view of a bypass air assembly according to another embodiment of the present invention;

fig. 14 is a perspective view of a bypass air assembly in accordance with yet another embodiment of the present invention;

FIG. 15 is a cross-sectional view of a bypass duct section of a bypass air assembly according to an embodiment of the present invention;

fig. 16 is a cross-sectional view of a bypass duct section of a bypass wind assembly according to another embodiment of the present invention.

Reference numerals: 1. an air curtain assembly; 11. an air curtain upper cover; 111. an introduction port; 112. an inlet tube; 12. an air curtain lower cover; 121. an air outlet; 122. buckling; 13. a vertical guide wind member; 14. Crimping the air outlet component; 141. guiding the air outlet;

2. a hood housing; 21. an air suction opening; 22. a guiding tuyere; 23. an accommodating cavity;

3. a bypass air assembly; 31. a side draft tube section; 311. a connecting port; 312. a pipe connection structure; 313. An outer lead-in tube; 314. an inner lead-in tube; 315. an air inducing structure; 32. a non-return valve; 33. a second oil-smoke separating device; 34. an elongated duct; 35. a multi-way joint;

4. a left baffle; 5. a right baffle; 6. a PM2.5 detection module; 7. enclosing plates; 8. a smoke exhaust fan.

The specific implementation mode is as follows:

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The following further description is made with reference to the accompanying drawings and specific examples:

example 1

In the present embodiment, as shown in fig. 12 to 16, the bypass air assembly 3 includes a bypass ventilation pipe section 31, a check valve 32, a second oil smoke separating device 33, and an elongated pipe 34, and in some embodiments, further includes a multi-way joint 35, and the second oil smoke separating device 33 and the check valve 32 are disposed on the bypass ventilation pipe section 31.

As shown in fig. 3, 5, 6 and 12, one end of the bypass air duct section 31 is connected to the smoke outlet of the smoke exhaust fan 8, the other end of the bypass air duct section is provided with a connection pipe structure 312, the connection pipe structure 312 includes an inner lining duct portion and a clamping groove portion, the connection pipe structure 312 is used for connecting a smoke exhaust duct, the smoke exhaust duct is sleeved on the inner lining duct portion, the smoke exhaust duct has a buckle or clamping block structure, and the buckle or clamping block structure can be clamped on the clamping groove portion of the connection pipe structure 312. The bypass ventilation pipe section 31 belongs to a part of a smoke exhaust duct, and smoke exhausted by the smoke exhaust fan 8 enters the smoke exhaust pipe after passing through the bypass ventilation pipe section 31, so that the bypass air pipe section 31 is positioned at the downstream of the smoke exhaust fan 8, and the inside of the bypass air pipe section is a positive pressure area.

As shown in fig. 5, 6, 12, 15 and 16, the bypass duct section 31 is provided with a connection port 311, the bypass duct section 31 is provided with an outer introduction pipe 313 outside the connection port 311, and the outer introduction pipe 313 may be formed integrally with the bypass duct section 31 or may be a separate structure. The outer lead-in tube 313 is connected to the air curtain assembly 1 by the elongated duct 34. Due to the positive pressure area inside the side draft tube segment 31, the smoke passing through it can partially enter the air curtain assembly 1 through the elongated duct 34 and be exhausted through the air outlet 121 of the air curtain lower cover 12 and the guiding air opening 22 of the casing of the cigarette making machine, thus forming the air curtain air.

The side ventilation assembly 3 has various structural forms, wherein in the first structure as shown in fig. 5, 12 and 15, the check valve 32 is arranged at the downstream of the second oil smoke separating device 33, the connection port 311 is arranged between the second oil smoke separating device 33 and the check valve 32, and two connection ports 311 are arranged, an outer introduction pipe 313 is arranged at the outer side of each connection port 311, and each outer introduction pipe 313 is connected with one air curtain assembly 1 through one elongated pipeline 34. The check valve 32 is disposed at the downstream of the second oil smoke separating device 33, so as to protect the second oil smoke separating device 33 from the influence of external air duct pollutants, and the check valve 32 is also disposed to prevent the back pressure of the external air duct from forming exhaust air to the guiding air inlet 22, which may pollute the kitchen. The included angle between the outer introducing pipe 313 and the horizontal plane is within the range of 20 degrees to 80 degrees, specifically 20 degrees, 45 degrees, 60 degrees, 80 degrees and the like, and meanwhile, the connecting port 311 forms a necking structure towards the outer introducing pipe 313, so that the oil smoke in the side ventilation pipe section 31 can conveniently enter the outer introducing pipe 313 through the connecting port 311 and then enter the air curtain assembly 1 through the slender pipeline 34.

In the second structure of the bypass ventilation module 3, as shown in fig. 6, 13 and 15, the check valve 32 is disposed downstream of the second oil smoke separating device 33, and the connection port 311 is disposed between the second oil smoke separating device 33 and the check valve 32, but only one connection port 311 is provided. The outer sides of the connecting ports 311 are provided with outer introducing pipes 313, the outer introducing pipes 313 are connected with a multi-way joint 35 through a slender pipeline 34, here, the multi-way joint 35 is of a three-way structure, the multi-way joint 35 can also be a four-way joint, and the like, the number of the heads of the multi-way joint 35 is one more than that of the air curtain assemblies 1, but the number of the heads of the multi-way joint 35 is not easy to be too large. The other two ends of the multi-way joint 35 are connected to an air curtain assembly 1 through an elongated duct 34.

A third configuration of the bypass ventilation module 3 is shown in fig. 14, which differs from the second configuration of the bypass wind module 3 in that: the check valve 32 is not disposed downstream of the second oil smoke separating device 33, but disposed upstream of the second oil smoke separating device 33, so that the influence of the pollution of the second oil smoke separating device 33 on the inner air duct section can be reduced, and the second oil smoke separating device 33 is convenient to disassemble, assemble, clean and maintain.

In the fourth structure of the bypass ventilation assembly 3, as shown in fig. 16, an inner introducing pipe 314 and an outer introducing pipe 313 are respectively arranged on the inner side and the outer side of the connecting port 311, an air inducing structure 315 with a downward opening is arranged at one end of the inner introducing pipe 314 away from the connecting port 311, the air inducing structure 315 can be in a shape of a cover or a bowl obliquely arranged, and the air inducing structure 315 can increase the air volume passing through the connecting port 311 to form an air curtain with larger air volume. This structure also makes it unnecessary for the outer introduction tube 313 to be disposed obliquely upward.

The slender pipeline 34 is made of transparent flexible pipes, the diameter range of the transparent flexible pipes is 10-20mm, specifically 10mm, 15mm, 18mm, 20mm and the like, and the length of the transparent flexible pipes is 25-80 times of the diameter of the transparent flexible pipes. The transparent hose passes through the gap or cavity between the wall of the positive pressure region of the flue gas duct and the enclosure plate 27. The transparent hose has the advantages that whether the inside of the transparent hose needs to be cleaned or not is favorably observed, oil smoke wind introduced by the air curtain component 1 fluctuates, and the transparent hose can reduce the fluctuation, so that the air curtain is more stable.

Because the air curtain component 1 introduces the oil smoke discharged by the smoke exhaust fan 8, the oil smoke entering the air curtain component has to be purified. The range hood comprises at least two purification devices, the smoke exhaust fan 8 is a first smoke separation device, and when blades of the smoke exhaust fan 8 rotate at a high speed, the rotating blades rub with oil smoke, so that oil drops are condensed on the blades and thrown onto the inner wall surface of the volute and flow to an oil collecting tank or an oil cup from an oil leakage hole at the lower part of the volute. The second oil-smoke separating device 33 is disposed on the side ventilation pipe section 31, and includes a discharge electrode and an oil collecting electrode, the oil collecting electrode is of a film structure or a plate structure, the purifying principle of the second oil-smoke separating device 33 is similar to the electrostatic dust removing principle, and particles in the oil-smoke enter a high-voltage electric field generated by the discharge electrode, are negatively charged, and are adsorbed by the positively charged oil collecting electrode. After the oil smoke is purified by the first oil smoke separating device and the second oil smoke separating device 33, the purification rate of PM2.5 can reach more than 98%.

Example 2

The present embodiment provides a range hood, which has the bypass air assembly provided in embodiment 1, and the structure of the range hood is shown in fig. 1 to 6, and includes a range hood housing 2, an air curtain assembly 1, a bypass air assembly 3, and a shroud 7. The shell 2 of the range hood is provided with an air suction opening 21, an air exhaust opening and a guide air opening 22, the air suction opening 21 and the air exhaust opening are communicated to form a smoke exhaust air channel, and a smoke exhaust fan 8 is arranged in the smoke exhaust air channel. The coaming 7 wraps part of the smoke exhaust duct and has a decorative effect. In addition, a certain gap is formed between the enclosing plate 7 and the wall surface of the smoke exhaust duct, and the elongated pipe 34 of the bypass air assembly 3 can pass through the gap, so that the enclosing plate 7 also has the function of protecting the elongated pipe 34. The air inlet 21 is long, and is horizontally disposed and extends along the left-right direction, that is, the length direction of the air inlet 21 is the left-right direction. The guiding air opening 22 is also elongated and arranged parallel to the air suction opening 21. The air curtain air is blown out from the guide air port 22, the guide air port 22 is arranged on the front side of the air suction port 21, and the arrangement can separate people from oil smoke, effectively reduce the escape of the oil smoke and effectively prevent the excessive oil smoke from being sucked by people.

In this embodiment, two guiding air ports 22 are provided, and the two guiding air ports 22 are arranged left and right, the air curtain blown out by the guiding air port 22 on the left side is a left air curtain, and the air curtain blown out by the guiding air port 22 on the right side is a right air curtain. The number of the guide tuyeres 22 may be one, or three or more. The left side and the right side of the range hood shell 2 are respectively provided with a left baffle 4 and a right baffle 5, the guide air opening 22 is positioned between the left baffle 4 and the right baffle 5, the left baffle 4 and the right baffle 5 can prevent the oil smoke from escaping from the left side and the right side of the range hood, and the air curtain air at the left end of the left air curtain and the air curtain air at the right end of the right air curtain can be prevented from escaping from the left side and the right side of the range hood and can not be sucked away by the air suction opening 21.

The range hood shell 2 is internally provided with an accommodating cavity 23, the shell wall at the upper end of the accommodating cavity 23 is provided with air holes, the accommodating cavity 23 can be communicated with the atmosphere through the air holes, the accommodating cavity 23 is internally provided with a PM2.5 detection module 6, the PM2.5 detection module 6 is provided with a fan and can suck outside air into the accommodating cavity 23 through the air holes, the PM2.5 detection module 6 carries out PM2.5 detection on the sucked outside air, when the PM2.5 of the outside air exceeds a set value, the PM2.5 detection module 6 can send a signal to an MCU (microprogrammed control unit) chip of the range hood, and the MCU chip controls the gear of the smoke exhaust fan 8 to be increased after receiving the signal sent by the PM2.5 detection module 6. Therefore, the range hood is more intelligent. The application scenes are many, if the hands of a cook can be stained with more oil stains sometimes, the gears of the smoke exhaust fans 8 are not convenient to be directly heightened by the hands, when the gears of the smoke exhaust fans 8 are low and oil smoke escapes or overflows and scatters more, the escaped oil smoke can be detected by the PM2.5 detection module 6, and after the PM2.5 detection module 6 sends signals to the MCU chip, the MCU chip automatically controls and heightens the gears of the smoke exhaust fans 8. Therefore, the arrangement of the PM2.5 detection module 6 ensures that the range hood has the function of automatically detecting whether the content of PM2.5 in the outside air exceeds the standard or not, automatically heightening the gear of the smoke exhaust fan 8 when the content of PM2.5 in the outside air exceeds the standard, and effectively improves the practicability, intelligence and environmental protection of the range hood.

As shown in fig. 7 to 11, the air curtain assembly 1 includes an air curtain housing including an upper air curtain cover 11 and a lower air curtain cover 12, and a guide member provided between the upper air curtain cover 11 and the lower air curtain cover 12. The air curtain upper cover 11 is provided with an introducing port 111, the introducing port 111 is used for introducing part of the smoke discharged by the smoke exhaust fan 8 of the range hood, the air curtain lower cover 12 is provided with an elongated air outlet 121 for forming air curtain air with a downward component, and the air curtain is directly blown along the guiding direction of the air curtain air by the guiding member instead of turbulent flow.

The detachable connecting structure is arranged between the air curtain upper cover 11 and the air curtain lower cover 12, so that the air curtain upper cover 11, the air curtain lower cover 12 and the guide piece can be cleaned and replaced conveniently. There are many ways of detachable connection, including but not limited to snap connection, screw connection, or a combination of snap connection and screw connection. If when being connected for the buckle between air curtain upper cover 11 and the air curtain lower cover 12, can be provided with buckle 122 on air curtain lower cover 12, set up the draw-in groove with the buckle 122 one-to-one of air curtain lower cover 12 on air curtain upper cover 11, also or set up buckle structure on air curtain upper cover 11, set up the draw-in groove structure on air curtain lower cover 12. The joint of the air curtain upper cover 11 and the air curtain lower cover 12 should be kept sealed, so a sealing connection means is formed between the air curtain upper cover 11 and the air curtain lower cover 12, the sealing connection means also has various structural forms, for example, the sealing connection means is a sponge layer deformed by compression joint, for example, a containing groove arranged on the connecting surface between the air curtain upper cover 11 and the air curtain lower cover 12 and a deformable sealing ring or a sealing gasket arranged in the containing groove are arranged.

The air curtain upper cover 11 is provided with a convex cover body, a pressure stabilizing cavity is formed between the convex cover body and the guide piece and is communicated with the introducing port 111, the introducing port 111 is arranged in the middle of the pressure stabilizing cavity, and the convex cover body forms an inner cavity surface which is expanded leftwards and rightwards by taking the introducing port 111 as a center, so that the smoke introduced by the introducing port 111 is diffused to the whole pressure stabilizing cavity more quickly and uniformly, and the generated air curtain is more uniform. The inner cavity surface has an angle in the range of 120-160 °, such as 120 °, 123 °, 130 °, 144 °, 152 °, 160 °, and so on. An inlet pipe 112 communicated with the pressure stabilizing cavity through the inlet 111 is arranged at the inlet 111, the inlet pipe 112 forms a downward included angle, the angle ranges from 0 degrees to 90 degrees, and the inlet pipe 112 is convenient for the air curtain assembly 1 to be connected with a pipeline.

The structure form of the guiding piece is various, one of the structures is shown in fig. 7, 9 and 10, the guiding piece comprises a vertical air guiding component 13 and a crimping air-out component 14, the vertical air guiding component 13 and the crimping air-out component 14 are arranged on top of each other, and the vertical air guiding component 13 can be arranged below the crimping air-out component 14, as shown in fig. 7; or above the crimping outlet member 14. The guiding elements are such that the air curtain is blown straight in its guiding direction, rather than being turbulent, and the vertical guiding wind members 13 are required to have a certain height, or thickness, and not to be too high or too thick. The height of the vertical wind guiding part 13 is between 1.5-18mm, and specifically may be 1.5mm, 3.2mm, 6.3mm, 13mm, 15.7mm, 18mm, etc. The vertical wind guide member 13 is a hexahedral honeycomb guide-shaped structure, and may be made of plastic or metal. The press-fit air-out member 14 has an elongated guide air outlet 141, and the guide air outlet 141 is disposed corresponding to the air outlet 121 of the air curtain lower cover 12. The crimping air-out component 14 has a thin-wall plate surface, has certain elasticity, and has an elastic crimping function.

Another configuration of the guide is shown in fig. 8, 9 and 11, in which the guide has only one vertical guide part 13 and is integrally formed with the air curtain lower cover 12, and the guide has a rectangular grid guide shape and can be made of plastic or metal. The height of the guide is 1.5-18mm, specifically 1.5mm, 4.4mm, 7.5mm, 12.6mm, 16.4mm, 18mm, etc.

The two structural styles of the guide piece have advantages and disadvantages respectively, the guide piece is convenient to disassemble, clean and replace due to the first structural style, and the problem of neglected loading is easy to occur when workers assemble the guide piece, so that the quality of a product is unqualified. The second structure can not cause the problem of neglected loading, but is inconvenient to disassemble, clean and replace. The guide member may have other structures, such as a vertical guiding wind part 13 and a crimping wind part 14, and is integrally formed with the air curtain lower cover 12, and so on, which are not illustrated herein.

As shown in fig. 5 and 6, the air curtain assembly 1 is disposed in the accommodating cavity 23 of the casing 2 of the range hood, the accommodating cavity 23 is further provided with a PM2.5 detection module 6, an electric element and a circuit structure such as a circuit board, etc., the flue gas introduced by the air curtain assembly 1 is purified, and even if purified, the electric element and the circuit structure in the accommodating cavity 23 are polluted, so that it is necessary to provide a sealing connection means such as a sealing ring seal capable of being deformed by crimping, etc., between the air curtain lower cover 12 and the casing 2 of the range hood. Therefore, the air containing the oil smoke introduced by the air curtain component 1 can not enter the accommodating cavity 23 of the cigarette machine shell 2 through the air outlet 121 of the air curtain lower cover 12, and the pollution to the electric elements and the circuit structure in the accommodating cavity 23 can be avoided.

The oil smoke introduced by the air curtain component 1 is discharged through the air outlet 121 of the air curtain lower cover 12 and the guiding air opening 22 of the shell of the range hood to form air curtain air. The blowing direction of the air curtain wind does not require a certain vertical downward direction, and the air curtain wind can be properly inclined forwards or backwards, and a downward component is required. The principle of the arrangement is to guide the exhaust air from the air inlet 22, i.e. the curtain air, to be sucked by the air suction opening 21 and discharged through the smoke exhaust fan 8.

The principle of the range hood for generating the air curtain is as follows: the air curtain component 1 introduces purified oil smoke discharged by the smoke exhaust fan 8 through the side ventilation component 3 to generate an air curtain, and an independent air curtain fan which needs to be independently controlled does not need to be additionally used, so that the air curtain can be generated. Not only the structure of the air curtain component 1 is simplified, but also the circuit structure of the range hood is simplified, the equipment cost is saved, and the consumption of electric energy is saved. The air curtain is generated by the independent air curtain fan, and the air curtain fan with the frequency conversion adjusting function is needed to be used for controlling the air speed of the air curtain, so that the cost is very high.

In the practical use of the range hood, when the back pressure is very low, the oil smoke discharge is very smooth, and only little air curtain wind or no air curtain wind is needed. As the back pressure increases, it becomes difficult to remove the oil smoke. When the range hood is used, the air curtain component 1 is communicated with the public flue, the back pressure in the public flue is increased, and the air curtain air is correspondingly accelerated. Like this, the wind curtain wind of higher speed also can be better blocks the oil smoke that escapes, and the better oil smoke that will escape blocks and pushes down to make smoke exhaust fan 8 take it away.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a bypass wind subassembly for range hood, its characterized in that: the smoke exhaust fan comprises a side ventilation pipe section, wherein one end of the side ventilation pipe section is connected with a smoke exhaust port of the smoke exhaust fan, the other end of the side ventilation pipe section is provided with a connecting pipe structure, the connecting pipe structure is used for connecting a smoke exhaust pipe, a check valve and a connector are arranged on the side ventilation pipe section, and the connector is connected with a slender pipeline.

2. The bypass wind assembly of claim 1, wherein: and a second oil-smoke separation device is arranged between the connecting pipe structure and the smoke exhaust port of the smoke exhaust fan, and the connecting port is arranged at the downstream side of the second oil-smoke separation device.

3. A bypass air assembly according to claim 2, wherein: the second oil-smoke separation device comprises a discharge electrode and an oil collection electrode, and the oil collection electrode is of a membrane structure or a plate structure.

4. The bypass air assembly of claim 1, wherein: the connecting ports are provided with one or more connecting ports, the outer side of each connecting port is provided with an outer lead-in pipe inclining upwards, the included angle range between the outer lead-in pipe and the horizontal plane is 20-80 degrees, and the outer lead-in pipe of each connecting port forms a necking structure.

5. The bypass air assembly of claim 1, wherein: the air inlet structure is characterized in that one or more connectors are arranged, an inner introducing pipe and an outer introducing pipe are respectively arranged on the inner side and the outer side of each connector, an air inducing structure with a downward opening is arranged at one end, far away from the connectors, of each inner introducing pipe, and the air inducing structure is used for increasing the air volume passing through the connectors.

6. The bypass air assembly of claim 1, wherein: the connecting ports are provided with one or more than one, the slender pipeline is transparent hoses, the transparent hoses are correspondingly connected with the connecting ports one by one, or the transparent hoses are connected with one transparent hose through a multi-way joint, and the transparent hose is connected with one connecting port.

7. A range hood, including the cigarette machine body and any one of claims 1-6 the other ventilation assembly, there are inlet scoop and air exit on the said cigarette machine body, connect inlet scoop and air exit and form the flue gas channel of discharging fume, there are smoke exhaust fans in the flue gas channel of discharging fume, characterized by that: the range hood shell is further provided with a guide air port, air exhausted by the slender pipeline is exhausted by the guide air port and forms a component of downward air supply, and exhaust air of the guide air port is sucked by the air suction port and is exhausted to the air exhaust port by the smoke exhaust fan.

8. A range hood according to claim 7, wherein: an air curtain assembly is arranged in the smoke machine shell and positioned at the guide air port, the air curtain assembly comprises an air curtain shell, the air curtain shell comprises an upper air curtain cover and a lower air curtain cover which are detachably connected, an introduction port is formed in the upper air curtain cover, and the introduction port is connected with the connecting port through a long and thin pipeline; the air curtain lower cover is provided with an air outlet, and a guide piece is arranged between the air curtain upper cover and the air curtain lower cover; and the exhaust air of the air curtain component air outlet is exhausted by the guide air port to form air curtain air with a downward component.

9. A range hood according to claim 7, wherein: the cigarette machine shell is provided with an accommodating cavity, the accommodating cavity is communicated with the atmosphere, and a PM2.5 detection module is arranged in the accommodating cavity.

10. A range hood according to claim 7, wherein: the air suction opening is in a long strip shape, is horizontally arranged and extends along the left and right directions; the guide air inlet is arranged on the front side of the air suction opening, the guide air inlet is also in a long strip shape and is parallel to the air suction opening, a left baffle and a right baffle are respectively arranged on the left side and the right side of the shell of the range hood, and the guide air inlet is positioned between the left baffle and the right baffle.

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