CN110805937A

CN110805937A - Fume exhaust fan

Info

Publication number: CN110805937A
Application number: CN201810886559.7A
Authority: CN
Inventors: 吴灵辉; 何立博
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2020-02-18

Abstract

The invention relates to a range hood, which comprises a fan, a fan outer cover, a smoke collecting hood and air pipes arranged on two sides of the fan outer cover, wherein the outlet end of a volute of the fan is connected with an air outlet hood, baffles are respectively arranged on the left side and the right side in the smoke collecting hood, the baffles and the side walls of the smoke collecting hood are enclosed in the left side and the right side of the smoke collecting hood to form independent air outlet cavities, and air outlets are arranged on the smoke collecting hood corresponding to the air outlet cavities. The inlet end of each air pipe is connected to the air outlet cover and communicated with the cavity in the air outlet cover, and the outlet end of each air pipe is connected to the smoke collecting cover and communicated with the air outlet cavity. This range hood can not only realize the air curtain effect, can also carry out the drainage to needs exhaust part flue gas when public flue backpressure is higher, and the convenience is dismantled to the tuber pipe structure simultaneously, convenient clearance or change.

Description

Fume exhaust fan

Technical Field

The invention relates to the technical field of kitchen electricity, in particular to a range hood capable of realizing oil smoke drainage and providing an air curtain.

Background

The integral installation height of the European-style range hood determines that the range hood is far away from a kitchen ware generating oil smoke, the negative pressure loss is large, and the oil smoke rising above a pot easily escapes from two sides of a smoke collecting cover, so that the oil smoke suction effect is poor. And once the oil smoke is separated from the area, the traditional range hood cannot suck back the oil smoke. In order to improve the oil smoke absorption effect of the range hood, people improve the structure of the oil suction press, and a fan system of the range hood is improved by a common method, for example, the power of a fan is increased, for example, the structure of an impeller is improved, and the like. Although the improvement can effectively improve the oil fume suction effect of the range hood, the structure of the whole fan system needs to be improved, the structure is complex, the distribution of a negative pressure area of the range hood during working cannot be improved, the negative pressure loss is relatively large, and the oil fume above a cooking bench is easy to escape from the two sides of the fume collecting hood. In addition, under the condition that the back pressure of the common flue is high, the oil smoke is difficult to discharge, and the oil smoke can escape more seriously.

Chinese utility model patent "a range hood" with grant publication No. CN206073205U (application No. 201621088225.8), wherein the range hood disclosed therein is provided with movable smoke baffle plates on the left and right sides of the smoke collecting hood, the smoke baffle plates can extend downwards to the outside of the smoke collecting hood or retract upwards into the smoke collecting hood, and an air flow chamber is arranged inside the movable sample plate, and a jet orifice or a nozzle obliquely arranged downwards is arranged at the lower air outlet of the air flow chamber. The air flow emitted by the nozzle can form the air curtain effect on the two sides of the smoke collecting hood, so that the oil smoke is effectively prevented from escaping from the two sides of the smoke collecting hood. Although this structure can effectual prevention oil smoke escape, the cigarette board need reciprocate in the course of the work, and it is responsible for relatively to realize the structure that reciprocates of cigarette board. In addition, the upper air inlet of the smoke baffle is positioned at a lower position in the smoke collecting hood, oil stains in the oil smoke are not fully filtered and deposited, and then the oil stains are deposited in the airflow cavity after entering the airflow cavity of the smoke baffle, so that the smoke baffle is difficult to disassemble and clean when needing to be cleaned, and the smoke baffle can influence the use of the airflow cavity and even block the airflow cavity in the long-term use process. In addition, when the insufficiently filtered smoke is sprayed out from the lower air outlet of the smoke baffle, the oil stain content is high, and the pollution to the kitchen environment can be caused to a certain degree.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a range hood for guiding and re-sucking part of smoke to be exhausted when the back pressure of a public flue is high in the prior art.

The second technical problem to be solved by the invention is to provide a range hood which can realize a diversion air curtain while solving the first technical problem.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a range hood, includes fan dustcoat, sets up fan in the fan dustcoat, locates the collection petticoat pipe of fan dustcoat below, the fan dustcoat inner chamber that fuel feeding cigarette passes through has, the exit end of fan is connected with out fan housing, its characterized in that: the fan outer cover is characterized by also comprising a fluid channel independent of the inner cavity of the fan outer cover, wherein the inlet end of the fluid channel is communicated with the air outlet cover, and the outlet end of the fluid channel is communicated with a smoke collecting area enclosed by the inner cavity of the fan outer cover and/or the smoke collecting cover.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the air conditioner is characterized in that at least the left side and the right side of the smoke collecting hood or the fan outer cover are respectively provided with an independent air outlet cavity, the cavity wall of each air outlet cavity is provided with an air outlet for exhausting air to the side edge of the smoke collecting hood, and the outlet end of the fluid channel is communicated with the air outlet cavities.

Simply, the collection petticoat pipe has the cavity of enclosing establishing in collection cigarette district a week, the left and right sides in the cavity is provided with the baffle respectively, the baffle encloses with the wallboard of collection petticoat pipe in the left and right sides of collection petticoat pipe and establishes the formation the air outlet chamber.

In order to make the air-out of air outlet even, be provided with the rectifier network in the air-out intracavity, the rectifier network is located between fluid passage's export and the air outlet.

In order to be capable of timely detecting the condition that the oil smoke escapes from the two sides of the smoke collecting cover, an oil smoke concentration sensor is arranged in the air outlet cavity.

Optionally, a pipe is arranged on the inner wall or the outer wall of the fan housing to form the fluid passage.

Optionally, separate air ducts are provided on both sides of the blower housing, and the ducts in the air ducts form the fluid passage.

In order to facilitate installation and disassembly, the air pipe comprises a first pipe body connected with the air outlet cover, a second pipe body connected with a smoke collection area enclosed by the inner cavity of the fan outer cover and/or the smoke collection cover, and an installation pipe fitting connected between the first pipe body and the second pipe body.

In order to accelerate the gas flow in the air duct, a fan is arranged in the fluid passage.

In order to actively control the rotation of the fan when needed and further enhance the drainage effect on the gas, a motor capable of driving the fan to rotate is arranged in the fluid channel.

And adjustably, an adjusting valve for adjusting the ventilation area in the air pipe is also arranged in the fluid channel.

Preferably, the regulating valve is disposed at an inlet section of the fluid passage.

Compared with the prior art, the invention has the advantages that: the range hood is provided with the fluid channel which is communicated between the air collecting cover and the upstream of the oil smoke discharge channel independently from the inner cavity of the outer cover of the fan, so that when the back pressure in the common flue is higher, the oil smoke can flow back to the upstream of the oil smoke discharge channel under the drainage action of the fluid channel, and the smoke discharge pressure of the common flue is relieved. On the other hand, the smoke output from the fluid channel can promote more oil smoke to be absorbed, and the pollution to the kitchen environment when the back pressure of the public flue is high is reduced.

In addition, an independent air outlet cavity is arranged in the smoke collecting hood, and the outlet of the fluid channel is communicated with the air outlet cavity, so that smoke exhausted from the fluid channel can be blown out from an air outlet on the air outlet cavity to form an air curtain, and the smoke is prevented from escaping from two sides of the smoke collecting hood. In addition, partial smoke entering the fluid channel is fully filtered and deposited by the smoke exhaust channel of the range hood, so that oil stains of the smoke are greatly reduced, the cleanness degree is high, and the smoke is not greatly influenced on the kitchen environment after being exhausted from the air outlet.

Drawings

Fig. 1 is a perspective view of a range hood in an embodiment of the present invention.

Fig. 2 is a perspective view of a range hood with a part of a smoke collecting hood removed in the embodiment of the invention.

Fig. 3 is a sectional view of the range hood in the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to fig. 3, the range hood in the present embodiment includes a fan 1, a fan housing 2, a smoke collecting hood 3, an air outlet hood 4, an air duct 6, a rectifier network 200, a fan 7, a motor 8, an air speed sensor, a smoke concentration sensor, and an adjusting valve 100.

The collection petticoat pipe 3 is connected and is set up in fan dustcoat 2 below, has the inner chamber that supplies the oil smoke to pass through in the fan dustcoat 2, and collection petticoat pipe 3 encloses and establishes and form the collection cigarette district, and the collection cigarette district of collection petticoat pipe 3 constitutes oil smoke discharge channel jointly with the inner chamber in the fan dustcoat 2. The fan 1 is positioned in the fan outer cover 2, the fan 1 and the fan 1 in the existing range hood are provided with a volute 11 and other components, the outlet end of the volute 11 is connected with an air outlet cover 4, and the air outlet cover 4 is used for connecting a smoke exhaust pipe leading to a common flue.

A fluid channel is arranged independently of the inner cavity of the fan outer cover 2, the inlet end of the fluid channel is communicated with the air outlet cover, and the outlet end of the fluid channel is communicated with a smoke collecting area enclosed by the inner cavity of the fan outer cover 2 and/or the smoke collecting cover 3. The pipes can be directly arranged on the inner wall or the outer wall of the fan housing 2 to form a fluid channel. However, in order to facilitate installation and disassembly, in this embodiment, air ducts 6 are respectively disposed outside the left and right side walls of the blower housing 2, and the ducts in the air ducts 6 form fluid passages.

The smoke collecting cover 3 is provided with a cavity which is enclosed in a smoke collecting area for a circle, the left side and the right side in the cavity are respectively provided with a baffle 5 along the front-back direction, and the baffle 5 and the wall plate of the smoke collecting cover 3 are respectively enclosed on the left side and the right side of the smoke collecting cover 3 to form an independent air outlet cavity 30. And the air outlet chamber 30 extends in the front-rear direction and is independent of the soot discharge passage. A plurality of air outlets 31 are arranged on the wall of the air outlet cavity 30. In this embodiment, the air outlet 31 is formed at the bottom of the two sides of the smoke collecting hood 3, the shape of the air outlet 31 is specifically set according to the requirement, and the air outlet 31 in this embodiment includes a plurality of small holes arranged in the front-back direction. Meanwhile, the air outlet angle of the air outlet 31 is specifically designed according to needs, and can be a fixed air outlet direction, and a rotatable air deflector can be arranged to adjust different air outlet directions.

The trend of the air pipe 6 is matched with the outer contour lines of the fan outer cover 2 and the smoke collecting cover 3. The inlet ends of the two air pipes 6 are respectively connected with the left side and the right side of the air outlet cover 4, and the air pipes 6 are communicated with the air outlet cover 4. The outlet end of the air pipe 6 arranged on the left side of the fan outer cover 2 is connected with the upper end of the left side of the smoke collecting hood 3 and communicated with the air outlet cavity 30 on the left side. The outlet end of the air pipe 6 arranged on the right side of the fan outer cover 2 is connected with the upper end of the right side of the smoke collecting hood 3 and is communicated with the air outlet cavity 30 on the right side.

All be provided with rectifier network 200 in every air-out chamber 30, this rectifier network 200 corresponds the setting with the distribution range of air outlet 31 to this rectifier network 200 is located between the export of tuber pipe 6 and air outlet 31, then the flue gas that enters into air-out chamber 30 from the export of tuber pipe 6 evenly discharges from air outlet 31 through rectifier network 200's rectification effect. This rectifier network 200 still additionally has the filtering action to flue gas in tuber pipe 6, improves the cleanliness factor from air outlet 31 exhaust flue gas, avoids the pollution to the kitchen environment.

The air duct 6 in this embodiment includes a first duct body 61 connected to the air outlet cover 4, a second duct body 62 connected to the air outlet chamber 30, and an installation pipe 63 connected between the first duct body 61 and the second duct body 62, where the installation pipe 63 is drum-shaped, and the fan 7 and the motor 8 are both installed in the installation pipe 63. Therefore, the installation of the fan 7 and the motor 8 in the air duct can be conveniently realized. The adjusting valve 100 is disposed in the inlet end of the first tube 61, and can adjust the cross-sectional area of the air duct 6 through which the oil smoke passes, and the adjusting valve 100 can be an electromagnetic valve.

The controller in this embodiment may adopt a main control unit in the range hood, and then the controller is electrically connected with the fan 1, so as to control the fan 1 to work. The fan 7 is connected to the driving end of the motor 8, and an air velocity sensor which can detect the rotation velocity of the fan 7 can be provided according to the requirement. The motor 8, the air speed sensor and the regulating valve 100 are all electrically connected with a controller in the range hood, the controller can receive the rotating speed of the fan 7 transmitted by the air speed sensor, and the controller can also control the motor 8 to work so as to drive the fan 7 to rotate, so that the exhaust speed of smoke in the air pipe 6 is increased.

The oil smoke concentration sensor is arranged in the air outlet cavity 30, the oil smoke concentration sensor can be arranged on the rectifier network 200 in the embodiment, and the oil smoke concentration sensor is electrically connected with the controller. The oil smoke concentration sensor is used for detecting whether oil smoke escapes from two sides of the smoke collecting cover 3 or not, the oil smoke concentration sensor transmits the detected oil smoke concentration to the controller, and when the controller judges that the detected oil smoke concentration exceeds an oil smoke escape response set value, the controller considers that the oil smoke escapes to the side edge of the smoke collecting cover 3, and then corresponding response measures are controlled to be started to solve the problem.

The working process of the range hood is as follows: after the range hood is started, the controller controls the motor 8 to be out of work by default, and controls the regulating valve 100 to be opened to a certain opening degree. Under the condition that the oil smoke is small, the fan 1 basically can work to ensure that the condition that the oil smoke escapes from two sides of the smoke collecting cover 3 does not occur, and at the moment, the oil smoke concentration transmitted to the controller by the oil smoke concentration sensor does not exceed the oil smoke escape response threshold correspondingly. One part of the smoke discharged from the air outlet hood 4 flows into the air outlet cavity 30 of the smoke collecting hood 3 through the air pipe 6, and the air outlet 31 discharges the smoke in the air pipe 6 with smaller airflow. In the process, the flue gas entering the air duct 6 can drive the fan 7 to rotate autonomously at a lower rotating speed. The wind speed sensor detects the rotating speed of the fan 7 in real time and then transmits the rotating speed to the controller. Along with the gradual increase of oil smoke or when the pressure in the public flue is larger, the smoke entering the air pipe 6 is correspondingly increased, the autonomous rotating speed of the fan 7 in the air pipe 6 is correspondingly increased, and when the rotating speed of the fan 7 acquired in the controller exceeds a set autonomous rotating speed threshold value, the oil smoke amount is larger or the public flue is blocked, and the compressed condition of the public flue can be correspondingly judged according to the autonomous rotating speed of the fan 7. A pressure sensor for detecting the pressure condition of the common flue can also be directly arranged at the outlet of the air outlet housing 4. The controller directly judges the pressed condition of the public flue according to the pressure value of the pressure sensor. According to the compressed condition of the public flue, the controller can control the work of the regulating valve 100, and then the passing area of the flue gas is increased, and then the rotating speed of the fan 7 or the wind pressure of the outlet of the air outlet cover is monitored, if the rotating speed of the fan 7 still exceeds the set autonomous rotating speed threshold value or the wind pressure of the outlet of the air outlet cover still exceeds the set compressed excessive response threshold value, the controller controls the work of the motor 8, and then the fan 7 is driven to rotate at a high rotating speed, the drainage effect on the flue gas is achieved, and the exhaust pressure of the public flue can be reduced. If the controller detects that the working current of the fan 1 still exceeds the working current threshold of the corresponding gear under the drainage action of the air pipe 6, the controller can control the fan 1 to increase the rotating speed.

In addition, the smoke passes through the air outlet cavity 30 and is discharged from the air outlet 31 to form an air curtain, so that the high-concentration smoke can be prevented from escaping from the two sides of the smoke collecting hood 3. In addition, at any time when the range hood works, if the oil smoke concentration data transmitted to the controller by the oil smoke concentration sensor exceeds the oil smoke escape response threshold value, the situation that the oil smoke escapes is indicated, the controller also controls the motor 8 to work so as to drive the fan 7 to rotate, further the air is induced into the air outlet cavity 30 and is exhausted from the air outlet 31 to form an air curtain, and the oil smoke is prevented from escaping from two sides of the smoke collecting hood 3.

Claims

1. The utility model provides a range hood, includes fan housing (2), sets up fan (1) in fan housing (2), locates collection petticoat pipe (3) of fan housing (2) below, fan housing (2) inner chamber that fuel feeding cigarette passes through has, the exit end of fan (1) is connected with out fan housing (4), its characterized in that: the fan is characterized by further comprising a fluid channel independent of the inner cavity of the fan outer cover (2), the inlet end of the fluid channel is communicated with the air outlet cover (4), and the outlet end of the fluid channel is communicated with a smoke collecting area enclosed by the inner cavity of the fan outer cover (2) and/or the smoke collecting cover (3).

2. The range hood of claim 1, wherein: the air-conditioning fan is characterized in that at least the left side and the right side of the smoke collecting hood (3) or the fan outer cover (2) are respectively provided with an independent air outlet cavity (30), an air outlet (31) for exhausting air to the side edge of the smoke collecting hood (3) is formed in the cavity wall of the air outlet cavity (30), and the outlet end of the fluid channel is communicated with the air outlet cavity (30).

3. The range hood of claim 2, wherein: collection petticoat pipe (3) have and enclose the cavity of establishing in collection cigarette district a week, the left and right sides in the cavity is provided with baffle (5) respectively, baffle (5) enclose with the wallboard of collection petticoat pipe (3) in the left and right sides of collection petticoat pipe (3) and establish the formation go out wind chamber (30).

4. A range hood according to claim 2 or 3, wherein: be provided with rectification net (200) in air-out chamber (30), rectification net (200) are located between fluid passage's export and air outlet (31).

5. A range hood according to claim 2 or 3, wherein: and an oil smoke concentration sensor is arranged in the air outlet cavity (30).

6. A range hood according to any one of claims 1 to 3, wherein: and a pipeline is arranged on the inner wall or the outer wall of the fan housing (2) to form the fluid channel.

7. A range hood according to any one of claims 1 to 3, wherein: and independent air pipes (6) are arranged on two sides of the fan outer cover (2), and pipelines in the air pipes (6) form the fluid channel.

8. The range hood of claim 7, wherein: the air pipe (6) comprises a first pipe body (61) connected with the air outlet cover (4), a second pipe body (62) connected with a smoke collection area enclosed by an inner cavity of the fan outer cover (2) and/or the smoke collection cover (3) and an installation pipe fitting (63) connected between the first pipe body (61) and the second pipe body (62).

9. A range hood according to any one of claims 1 to 3, wherein: a fan (7) is arranged in the fluid channel.

10. The range hood of claim 9, wherein: and a motor (8) capable of driving the fan (7) to rotate is arranged in the fluid channel.

11. A range hood according to any one of claims 1 to 3, wherein: and a regulating valve (100) for regulating the ventilation area is also arranged in the fluid channel.

12. The range hood of claim 11, wherein: the regulating valve (100) is arranged at the inlet section of the fluid channel.