CN211600841U

CN211600841U - Smoke collecting device and side-suction type range hood

Info

Publication number: CN211600841U
Application number: CN202020181626.8U
Authority: CN
Inventors: 任富佳; 高少华; 陈建卫; 郑桐福; 余国成
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-09-29
Anticipated expiration: 2030-02-18

Abstract

The utility model provides a smoke collecting device and side-draught range hood, relating to the technical field of kitchen appliances. The smoke collecting device comprises a smoke collecting cover and an air suction assembly, wherein a smoke collecting cavity is formed in the smoke collecting cover, a smoke collecting panel of the smoke collecting cover is provided with a smoke suction port and a drainage hole, and the smoke collecting cover is provided with a smoke exhaust port; the air suction assembly is arranged in the smoke collection cavity and can suck the gas in the smoke collection cavity, and an air outlet of the air suction assembly is communicated with the smoke outlet; the fume collecting hood is fixedly connected with a drainage device, and the drainage device is used for driving external gas to flow into the fume collecting cavity through the drainage holes. The side-suction range hood comprises an air deflector and the smoke collecting device, wherein a driving device is installed on a smoke collecting cover of the smoke collecting device, and a driving end of the driving device is connected with the air deflector. The smoke collecting device has good smoking effect and low oil smoke escape amount.

Description

Smoke collecting device and side-suction type range hood

Technical Field

The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a smoke collecting device and side-draught type lampblack absorber are related to.

Background

The lampblack absorber wide application in the kitchen, during the use, the lampblack absorber is generally installed in the top of cooking utensils, and inside the lampblack absorber was inhaled to the lampblack absorber through forming the oil smoke that the negative pressure region produced cooking of cooking utensils to discharge the oil smoke to public flue in, the oil smoke that nevertheless cooking utensils produced upwards flows the process and escapes outside the negative pressure region easily and form and run the cigarette phenomenon, thereby leads to the smoking effect of lampblack absorber relatively poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a collection cigarette device and side-draught lampblack absorber to alleviate the relatively poor technical problem of smoking effect of the lampblack absorber that exists among the prior art.

In a first aspect, an embodiment provides a smoke collecting device, which comprises a smoke collecting hood and an air suction assembly, wherein a smoke collecting cavity is formed in the smoke collecting hood, a smoke collecting panel of the smoke collecting hood is provided with a smoke suction port and a drainage hole, and the smoke collecting hood is provided with a smoke discharge port; the air suction assembly is arranged in the smoke collection cavity and can suck the gas in the smoke collection cavity, and an air outlet of the air suction assembly is communicated with the smoke outlet;

the fume collecting hood is fixedly connected with a drainage device, and the drainage device is used for driving external gas to flow into the fume collecting cavity through the drainage holes.

In an optional embodiment, the drainage device includes auxiliary fan and drainage tube, the drainage tube rigid coupling in collection cigarette panel, the drainage tube is equipped with drainage air inlet and drainage gas outlet, the drainage air inlet with auxiliary fan's air outlet intercommunication, the drainage gas outlet with the drainage hole is corresponding and towards collection cigarette chamber.

In an optional embodiment, the drainage device further includes a communicating pipe, and the communicating pipe is communicated between the drainage air inlet and the air outlet of the auxiliary fan; the chamber wall in collection smoke chamber is equipped with keeps apart the box, just collection smoke chamber with keep apart the corresponding chamber wall of box and be equipped with the vent, auxiliary fan's air intake is located in the isolation box.

In an optional embodiment, the air suction assembly is a double-air-inlet fan, and an air inlet of the double-air-inlet fan faces the smoke suction port.

In an optional embodiment, an air guide ring is arranged around the front air inlet of the air suction assembly, and the outer edge of the air guide ring is connected with the edge of the smoking port in a matching manner.

In an alternative embodiment, the drainage tube is in a closed ring shape, the drainage outlet extends along the circumferential direction of the drainage tube, and the drainage tube is arranged along the circumferential direction of the drainage hole.

In an alternative embodiment, the draft tube has a radial cross-sectional area that gradually becomes larger along the flow direction of the gas flow.

In an alternative embodiment, the drainage air inlet is located in the ring of the drainage tube, and the air outlet direction of the drainage air inlet faces the ring of the drainage tube.

In a second aspect, an embodiment provides a side-draft range hood, which includes an air deflector and the smoke collecting device of any one of the foregoing embodiments, wherein a driving device is installed on a smoke collecting hood of the smoke collecting device, and a driving end of the driving device is connected with the air deflector and is used for driving the air deflector to approach or leave a smoke suction port of the smoke collecting device.

In optional implementation mode, the drainage hole is located the below of smoking mouth, the drainage hole is the bar hole, just the length direction in bar hole is followed the width direction of collection cigarette panel extends.

The utility model discloses smoke collecting device and side-draught range hood's beneficial effect includes:

the utility model provides a smoke collecting device and side-suction type range hood, wherein, the smoke collecting device comprises a smoke collecting cover for installing each part and accommodating oil smoke gas, an air suction assembly for sucking a smoke collecting cavity and external oil smoke and a drainage device for assisting the air suction assembly to suck the external oil smoke; the side-suction range hood comprises the smoke collecting device capable of sucking external oil smoke, an air deflector used for guiding the flow direction of the external oil smoke and a driving device used for driving the air deflector to move.

The driving device drives the air deflector to be blocked at the smoke suction port when the range hood is not needed to be used, so that the situation that secondary pollution is caused to a kitchen due to the fact that oil smoke in the common flue is re-filled to the kitchen through the smoke collection cavity is reduced. When the kitchen range cooks to generate oil smoke, the driving device drives the air deflector to move outwards, and a smoke inlet area is formed between the air deflector and the smoke suction port; and the air suction assembly is started, the air suction assembly sucks the smoke collection cavity and the smoke inlet area into a negative pressure state, external oil smoke moves upwards under the action of internal and external pressure difference and enters the smoke collection cavity through the smoke suction port, then enters the volute of the air suction assembly and is discharged into the common flue through the smoke exhaust port, and the oil smoke of the range hood is sucked by the range hood.

When the cooking range produces a large amount of oil smoke, on the basis that the air suction assembly operates to suck external oil smoke, the drainage device is opened, the drainage device serves as an auxiliary power source to drive external oil smoke gas to flow to the drainage holes in the smoke collection panel and enter the smoke collection cavity through the drainage holes, and then the air suction assembly sucks the external oil smoke gas to enter the volute and discharges the external oil smoke gas into the common flue through the smoke discharge port. The drainage device can be used as an auxiliary power source to improve the suction capacity of the smoke collecting device to oil smoke and promote more oil smoke to enter the smoke collecting device, so that the outward escape amount of the oil smoke is reduced, and the smoke absorbing effect of the smoke collecting device and the range hood is greatly improved. In addition, the drainage device and the air suction assembly are two independent power sources, and a user can select the on-off state of the drainage device according to the actual oil smoke amount of a kitchen, so that the practicability of the range hood is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a smoke collecting device provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the smoke collection device of FIG. 1, wherein the arrows indicate the direction of flow of the gas;

FIG. 3 is an exploded view of the smoke collecting device of FIG. 1;

fig. 4 is an internal schematic view of a back area of a smoke collecting device provided in an embodiment of the present invention, wherein arrows indicate a flowing direction of gas in a smoke collecting chamber;

fig. 5 is a schematic view illustrating a connection between a drainage tube and a communication tube in the smoke collecting device provided by the embodiment of the present invention;

FIG. 6 is a schematic radial cross-section of the draft tube of FIG. 5;

fig. 7 is a schematic view of an auxiliary fan in the smoke collecting device provided by the embodiment of the present invention.

Icon: 100-a smoke collecting hood; 110-a smoke collection chamber; 120-a smoke collecting panel; 130-a smoking port; 140-drainage holes; 150-smoke outlet; 160-a separator box; 170-a vent; 180-a glass panel; 200-a suction assembly; 210-a wind-guiding ring; 300-a drainage device; 310-auxiliary fan; 311-a housing; 312-an impeller; 313-a drive end; 320-a drainage tube; 321-a drainage air outlet; 323-fixing the ear; 330-communicating tube; 400-air deflectors; 410-a stent; 500-a drive device; 600-an oil collecting box; 700-processor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

The present embodiment provides a fume collecting device, as shown in fig. 1-4, comprising a fume collecting hood 100 and a suction assembly 200, wherein a fume collecting chamber 110 is formed in the fume collecting hood 100, a fume collecting panel 120 of the fume collecting hood 100 is provided with a fume suction port 130 and a flow guiding hole 140, and the fume collecting hood 100 is provided with a fume exhaust port 150; the air suction assembly 200 is arranged in the smoke collection cavity 110, can suck the gas in the smoke collection cavity 110, and an air outlet of the air suction assembly 200 is communicated with the smoke outlet 150; the fume collecting cover 100 is fixedly connected with a drainage device 300, and the drainage device 300 is used for driving external air to flow into the fume collecting cavity 110 through the drainage hole 140.

The embodiment also provides a side-suction range hood, as shown in fig. 1 and fig. 2, which includes an air deflector 400 and the above-mentioned smoke collecting device, wherein the smoke collecting hood 100 of the smoke collecting device is installed with a driving device 500, and a driving end 313 of the driving device 500 is connected with the air deflector 400 for driving the air deflector 400 to approach or depart from the smoke suction port 130 of the smoke collecting device.

The smoke collecting device and the side-suction range hood provided by the embodiment comprise a smoke collecting cover 100 for installing each part and containing oil smoke gas, a suction assembly 200 for sucking the smoke collecting cavity 110 and external oil smoke, and a drainage device 300 for assisting the suction assembly 200 to suck the external oil smoke; the side-suction range hood comprises the smoke collecting device capable of sucking external oil smoke, an air deflector 400 for guiding the flow direction of the external oil smoke and a driving device 500 for driving the air deflector 400 to move.

Initially, the smoke outlet 150 of the range hood is communicated with the common flue, and when the range hood is not needed, the driving device 500 drives the air deflector 400 to be blocked at the smoke suction port 130, so that the situation that secondary pollution is caused to a kitchen due to the fact that oil smoke in the common flue is returned to the kitchen through the smoke collection cavity 110 is reduced. When the kitchen range cooks to generate oil smoke, the driving device 500 drives the air deflector 400 to move outwards, and a smoke inlet area is formed between the air deflector 400 and the smoke suction port 130; the air suction assembly 200 is started, the air suction assembly 200 sucks the smoke collection cavity 110 and the smoke inlet area to be in a negative pressure state, external oil smoke moves upwards under the action of the internal and external pressure difference and enters the smoke collection cavity 110 through the smoke suction port 130, then enters the volute of the air suction assembly 200 and is discharged into a common flue through the smoke discharge port 150, and the oil smoke of the range hood is sucked.

When the cooking range produces a large amount of oil smoke, on the basis that the air suction assembly 200 sucks external oil smoke, the drainage device 300 is opened, the drainage device 300 serves as an auxiliary power source to drive external oil smoke gas to flow to the drainage holes 140 in the smoke collection panel 120, and the external oil smoke gas enters the smoke collection cavity 110 through the drainage holes 140, is sucked by the air suction assembly 200 into the volute of the air suction assembly and is discharged into a common flue through the smoke discharge hole 150. The arrangement of the drainage device 300 can be used as an auxiliary power source to improve the suction capacity of the smoke collecting device to the oil smoke, so that more oil smoke enters the smoke collecting device, the outward escape amount of the oil smoke is reduced, and the smoking effects of the smoke collecting device and the range hood are greatly improved. In addition, drainage device 300 is two independent power supplies with the subassembly 200 that induced drafts, and the user can select drainage device 300's on-off state according to the actual oil smoke volume in kitchen to improve the practicality of lampblack absorber.

Optionally, a layer of glass panel 180 can be arranged outside the smoke collection panel 120, so that the outer wall of the range hood facing the kitchen range is easy to clean, and the visual effect is good; the bracket 410 may be fixedly connected to an inner wall of the wind deflector 400, and the driving end 313 of the driving device 500 is connected to the bracket 410, so as to reduce the occurrence of the situation that the wind deflector 400 is easily broken due to the direct force applied to the wind deflector 400 by the driving end 313 of the driving device 500.

Optionally, in this embodiment, as shown in fig. 4, the drainage device 300 may include an auxiliary blower 310 and a drainage tube 320, the drainage tube 320 is fixedly connected to the smoke collection panel 120, the drainage tube 320 is provided with a drainage air inlet and a drainage air outlet 321, the drainage air inlet is communicated with an air outlet of the auxiliary blower 310, and the drainage air outlet 321 corresponds to the drainage hole 140 and faces the smoke collection cavity 110. Here is a specific form of the drainage device 300, when the auxiliary fan 310 operates, the auxiliary fan 310 drives the air to flow through the drainage air inlet, enter the drainage tube 320 and spray out from the drainage air outlet 321, the process of the air flow flowing to the smoke collection cavity 110 disturbs the air around the air flow, so that the area around the air flow forms negative pressure, the external oil smoke flows to the drainage hole 140 under the action of pressure difference, and enters the smoke collection cavity 110 through the drainage hole 140, and then enters the volute of the air suction assembly 200 and is discharged, thereby realizing the drainage of the oil smoke gas. Specifically, the drainage tube 320 may be provided with a fixing ear 323, and the drainage tube 320 is detachably and fixedly connected to the smoke collecting panel 120 through the fixing ear 323.

Specifically, in this embodiment, as shown in fig. 4 and 5, the drainage device 300 may further include a communicating pipe 330, as shown in fig. 4, the communicating pipe 330 is communicated between the drainage air inlet and the air outlet of the auxiliary blower 310; the isolation box 160 is disposed on the wall of the smoke collection chamber 110, the ventilation opening 170 is disposed on the wall of the smoke collection chamber 110 corresponding to the isolation box 160, and the air inlet of the auxiliary blower 310 is located in the isolation box 160. The connection pipe 330 is used for connecting the auxiliary fan 310 and the drainage pipe 320, when the drainage device 300 is needed, the auxiliary fan 310 is started, the auxiliary fan 310 sucks the gas in the isolation box 160 into the connection pipe 330 and the drainage pipe 320, and then the gas is sprayed into the smoke collection chamber 110 from the drainage gas outlet 321, wherein in the operation process of the auxiliary fan 310, the external gas can continuously enter the isolation box 160 through the vent 170 to supplement gas for the inner space of the isolation box 160, so that the normal operation of the auxiliary fan 310 is ensured. In addition, the air inlet of the auxiliary fan 310 is located in the isolation box 160, the space in the isolation box 160 is relatively independent from the space at other parts of the smoke collection cavity 110, the ventilation opening 170 of the isolation box 160 is communicated with the external environment, and the external air is continuously supplied to the isolation box 160, so that the situation that the gas sucked by the auxiliary fan 310 is oil smoke gas, the oil smoke gas causes oil pollution to the impeller 312 of the auxiliary fan 310 and the like, and the normal operation and the service life of the auxiliary fan are affected is reduced.

Optionally, a rubber pad may be disposed between the auxiliary blower 310 and the communication pipe 330 to improve the connection firmness between the auxiliary blower 310 and the communication pipe 330 and reduce the vibration transmitted from the auxiliary blower 310 to the communication pipe 330 and the drainage tube 320; specifically, as shown in fig. 7, the auxiliary blower 310 includes a housing 311 and an impeller 312 disposed in the housing 311, and a driving motor is further disposed in the housing 311, and the driving motor drives the impeller 312 to rotate, so as to drive the external airflow to flow.

Preferably, the insulation box 160 may be provided to a back plate of the smoke collecting cover 100, and accordingly, the ventilation opening 170 is also provided to the back plate. The back plate deviates from the cooking range to produce oil smoke, so that the oil smoke content of the gas entering the isolation box 160 and the auxiliary fan 310 through the ventilation opening 170 is reduced, the normal operation of the auxiliary fan 310 is further ensured, and the service life of the auxiliary fan is prolonged.

Alternatively, in the present embodiment, as shown in fig. 2 and 4, the air suction assembly 200 may be a double air intake blower, and the front air inlet of the double air intake blower faces the smoke suction port 130. When the air suction assembly 200 operates, the front air inlet of the air suction assembly 200 mainly sucks the area of the smoke suction port 130 to drive external oil smoke to flow into the volute of the air suction assembly 200 through the smoke suction port 130; meanwhile, the rear air inlet of the air suction assembly 200 mainly sucks the interior of the smoke collection chamber 110, and when the drainage device 300 is not started, the rear air inlet assists the front air inlet to suck the interior of the smoke collection chamber 110 into a negative pressure state, so that external oil smoke is further promoted to flow into the smoke collection cover 100; when the drainage device 300 operates, the rear air inlet is mainly used for sucking the oil smoke introduced into the smoke collection cavity 110 by the drainage device 300 so as to improve the suction capacity of the air suction assembly 200 and correspondingly improve the air performance of the smoke collection device and the range hood.

In this embodiment, as shown in fig. 2, the front air inlet of the air suction assembly 200 may be surrounded by an air guiding ring 210, and the outer edge of the air guiding ring 210 is connected to the edge of the smoke suction port 130 in a matching manner. On one hand, in the process that external oil smoke flows into the volute from the air inlet of the air suction assembly 200, the air guide ring 210 can guide the flow direction of the oil smoke gas flow so as to reduce the phenomenon that the oil smoke gas flow is bent at the air inlet at a sharp angle to form turbulence and reduce the occurrence of larger noise pollution caused by the bending of the oil smoke gas flow; on the other hand, the air guide ring 210 seals the smoke suction opening 130, the smoke collection cavity 110 is separated from the outside into two relatively independent spaces, external oil smoke can only enter the volute of the air suction assembly 200 through the smoke suction opening 130 and the front air inlet of the air suction assembly 200, the oil smoke guided into the smoke collection cavity 110 by the guide device 300 through the guide hole 140 can only enter the volute of the air suction assembly 200 through the rear air inlet of the air suction assembly 200, namely, the external oil smoke sucked by the air suction assembly 200 and the oil smoke guided by the guide device 300 are separated into two air flows by the air guide ring 210, so that the flow disturbance effect generated by the flowing of the two air flows is effectively reduced, and the suction performance of the smoke collection device and the range hood is correspondingly improved.

In this embodiment, as shown in fig. 5, the draft tube 320 may be in a closed loop shape, the draft outlet 321 extends along the circumferential direction of the draft tube 320, and the draft tube 320 is disposed along the circumferential direction of the draft hole 140. Here is a concrete form of drainage tube 320 and drainage gas outlet 321, and when drainage device 300 operates, the air current is spout through annular drainage gas outlet 321 and is formed the air current wall of enclosing drainage hole 140, and the middle part of this air current wall forms comparatively concentrated negative pressure region, and the negative pressure intensity in this negative pressure region is great to increase the interior outer differential pressure of drainage hole 140, correspondingly improve the drainage effect to outside oil smoke, and then improve the smoking effect of lampblack absorber, reduce the outside escape volume of oil smoke.

In the present embodiment, in the draft tube 320, the radial sectional area of the draft tube 320 becomes gradually larger along the flow direction of the air flow. The auxiliary fan 310 drives the external air to flow into the drainage tube 320 through the drainage air inlet and then flow to the pipelines at both sides, and the radial cross-sectional area of the drainage tube 320 gradually increases, that is, the flow cross-section of the air gradually increases, so that the air pressure loss in the air flowing process is reduced, the air pressure balance of the air flowing out through the drainage air outlet 321 is correspondingly ensured, and the balance and the stability of the formed negative pressure area are improved.

In this embodiment, as shown in fig. 6, the drainage air inlet may be located in a position inside the ring of the drainage tube 320, and the air outlet direction of the drainage air inlet faces the ring of the drainage tube 320. The air flow ejected from the drainage air outlet 321 is a necking cylindrical air flow, and the cylindrical air flow is tangential to the inner ring of the drainage tube 320, and the external oil smoke gas flow enters the negative pressure region and flows inwards along the cylindrical air flow, so that the phenomenon that the cylindrical air flow and the inner ring of the drainage tube 320 form a bending region, the oil smoke gas flow entering the negative pressure region forms turbulence in the bending region is reduced, the drainage effect of the drainage device 300 is further reduced, and the occurrence of a large noise pollution condition is caused. In addition, the radial cross section of the cylindrical air flow in the shape of the necking gradually becomes smaller from the drainage air outlet 321 to the smoke collection cavity 110, so that the turbulent flow of the drainage air flow to the smoke suction of the air suction assembly 200 is reduced on the basis of realizing drainage, and the normal operation of the air suction assembly 200 is ensured.

Specifically, in the present embodiment, as shown in fig. 6, the included angle between the air outlet direction of the drainage air outlet 321 and the axial cross section of the drainage tube 320 may be a, where 25 ° < a < 60 °; preferably, a is 30 °.

Alternatively, in this embodiment, as shown in FIG. 6, the width of the drainage outlet 321 may be L, where L is greater than 1.5mm and less than 3 mm; preferably, L ═ 2.1 mm. Specifically, the drainage tube 320 may be formed by rolling a rectangular plate, two long sides of the rectangular plate are enclosed into a ring shape, and the two long sides form a drainage air outlet.

Optionally, in this embodiment, as shown in fig. 1 and 4, the smoke collecting device may further include a processor 700, the processor 700 is installed on the smoke collecting hood 100, and both the suction assembly 200 and the auxiliary blower 310 are connected to the processor 700; the smoke collecting panel 120 is provided with a control panel, the control panel is connected with the processor 700, and a user can control the on and off of the air suction assembly 200 and the auxiliary fan 310 through buttons or a display screen of the control panel, so that the convenience of use of the range hood is improved. It should be noted that, the control panel is used to control the processor 700, and the processor 700 controls the on/off of the air suction assembly 200 and the auxiliary blower 310, and other related program settings, which belong to the prior art, and are not an improvement of the present application.

Optionally, as shown in fig. 3, when the range hood is a side-draught range hood, the drainage hole 140 may be located below the smoke suction port 130, the drainage hole 140 is a strip-shaped hole, and a length direction of the strip-shaped hole extends along a width direction of the smoke collection panel 120.

Optionally, in this embodiment, as shown in fig. 1 to fig. 3, an oil collecting box 600 may be detachably mounted at the bottom of the smoke collecting hood 100, and the oil collecting box 600 can accommodate oil collected by the smoke collecting hood 100 to reduce the pollution of the kitchen range caused by dripping of the oil.

Claims

1. The fume collecting device is characterized by comprising a fume collecting hood (100) and an air suction assembly (200), wherein a fume collecting cavity (110) is formed in the fume collecting hood (100), a fume collecting panel (120) of the fume collecting hood (100) is provided with a fume suction port (130) and a drainage hole (140), and the fume collecting hood (100) is provided with a fume discharge port (150); the air suction assembly (200) is arranged in the smoke collection cavity (110) and can suck the gas in the smoke collection cavity (110), and an air outlet of the air suction assembly (200) is communicated with the smoke outlet (150);

the fume collecting cover (100) is fixedly connected with a drainage device (300), and the drainage device (300) is used for driving external gas to flow into the fume collecting cavity (110) through the drainage hole (140).

2. The fume collecting device according to claim 1, wherein said flow guiding device (300) comprises an auxiliary fan (310) and a flow guiding tube (320), said flow guiding tube (320) is fixedly connected to said fume collecting panel (120), said flow guiding tube (320) is provided with a flow guiding air inlet and a flow guiding air outlet (321), said flow guiding air inlet is communicated with an air outlet of said auxiliary fan (310), said flow guiding air outlet (321) corresponds to said flow guiding hole (140) and faces said fume collecting cavity (110).

3. The fume collecting device according to claim 2, wherein said flow guiding device (300) further comprises a communicating pipe (330), said communicating pipe (330) is communicated between said flow guiding air inlet and an air outlet of said auxiliary fan (310); the wall of the smoke collection cavity (110) is provided with an isolation box (160), the walls of the smoke collection cavity (110) and the isolation box (160) are provided with ventilation openings (170), and the air inlet of the auxiliary fan (310) is located in the isolation box (160).

4. A smoke collecting device according to any one of claims 1-3, wherein said air suction assembly (200) is a double air intake fan, the front air intake of which is directed towards said smoke suction opening (130).

5. The fume collecting device according to claim 4, characterized in that the air inlet of the air suction assembly (200) is surrounded by an air guiding ring (210), and the outer edge of the air guiding ring (210) is connected with the edge of the smoke suction port (130) in a matching manner.

6. A smoke collecting device according to claim 2 or 3, wherein said drain tube (320) is closed ring-shaped, said drain air outlet (321) extends along a circumferential direction of said drain tube (320), said drain tube (320) is arranged along a circumferential direction of said drain hole (140).

7. The fume collecting device according to claim 6, characterized in that, in said draft tube (320), a radial cross-sectional area of said draft tube (320) becomes gradually larger in a flow direction of the air current.

8. The fume collecting device according to claim 6, wherein said air inlet is located in the ring of said draft tube (320), and the air outlet direction of said air inlet is towards the ring of said draft tube (320).

9. A side-draft range hood, characterized by comprising an air deflector (400) and the smoke collecting device of any one of claims 1 to 8, wherein the smoke collecting hood (100) of the smoke collecting device is provided with a driving device (500), and the driving end (313) of the driving device (500) is connected with the air deflector (400) and is used for driving the air deflector (400) to be close to or far away from the smoke suction port (130) of the smoke collecting device.

10. The side-draft range hood according to claim 9, wherein the drainage hole (140) is located below the smoke exhaust opening (130), the drainage hole (140) is a strip-shaped hole, and the length direction of the strip-shaped hole extends along the width direction of the smoke collecting panel (120).