CN111811007B

CN111811007B - Fume exhaust fan

Info

Publication number: CN111811007B
Application number: CN202010609843.7A
Authority: CN
Inventors: 徐梦玲
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2022-02-08
Anticipated expiration: 2040-06-29
Also published as: CN111811007A

Abstract

The invention discloses a range hood, which comprises a shell, a panel assembly arranged on the front side of the shell, wherein an air inlet is formed in the panel assembly, a smoke baffle plate is arranged on the front side of the panel assembly, the smoke baffle plate and the air inlet are oppositely arranged at intervals to form a structure of a suspension baffle plate, the range hood also comprises a balancing device, and the balancing device comprises a balancing inner machine for introducing outdoor air, a first balancing outer machine for blowing the air introduced by the balancing inner machine from the top end of the panel assembly to the smoke baffle plate direction to form an upper air curtain, and a second balancing outer machine for blowing the air introduced by the balancing inner machine from the bottom end of the panel assembly to the smoke baffle plate direction to form a lower air curtain. Compared with the prior art, the invention has the advantages that: an airflow barrier is formed under the action of the upper and lower air curtains and interacts with the suspension baffle plate to effectively guide airflow to be sucked into the range hood without escaping outwards, and the rest upper and lower air curtains enter the room to realize airflow supplement and balance, so that the balance of indoor and outdoor pressure can be realized without opening windows in the cooking process.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

In the northern weather, the floor heating is laid indoors, the sealing performance is good, and when a user carries out cooking experience, if a fan system of the range hood is not opened, indoor air can be discharged outdoors, so that the indoor atmospheric pressure is gradually lower than that outdoors, the air pressure difference is caused, the oil smoke absorption effect is seriously influenced, and the smoke leakage phenomenon is caused; if the window is opened, indoor air can be exhausted outdoors through the range hood, and outdoor cold air can enter the room to cause the indoor temperature to drop and cause discomfort; the existing range hood cannot solve the problem, so that the range hood which can be used in northern floor heating families is developed, and the range hood has important practical significance.

The oil absorption cigarette effect is range hood's important performance index, and the user can discover after using range hood culinary art at present that top of a kitchen range, wall, range hood fuselage all can be stained with the oil smoke, and it is very hard to experience when not good to clean, and this is because partial oil smoke flees among the culinary art in-process, through wall ceramic tile, glass condensation, so promote range hood oil absorption cigarette effect also extremely important. In addition, the noise is also the important performance index of range hood, and side suction range hood commonly used at present, because the fan system is put down, the air intake is close to the people body, so the noise is generally great, warms up indoor in the north because atmospheric pressure changes leads to air intake pressure unstable, and the noise grow makes user experience not good. The existing method for improving the oil smoke absorption effect and reducing the noise of the range hood is to improve the molded line of a volute of a host fan system, or optimize an internal flow field, or attach sound-absorbing cotton, rarely improve the external flow field, and has little effect on improving the oil smoke absorption effect and reducing the noise.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects of the prior art, so that the indoor and outdoor pressure balance can be achieved without opening a window in the cooking process, and the oil fume suction effect is improved.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes casing and the panel components of setting in the casing front side, the air intake has been seted up on the panel components, the front side of panel components is provided with the cigarette board that keeps off, keep off cigarette board and air intake interval ground mutual disposition and form the structure of suspension baffle, its characterized in that: the range hood further comprises a balancing device, wherein the balancing device comprises a balancing inner unit for introducing outdoor air, a first balancing outer unit for blowing the air introduced by the balancing inner unit from the top end of the panel assembly to the smoke baffle plate direction to form an upper air curtain, and a second balancing outer unit for blowing the air introduced by the balancing inner unit from the bottom end of the panel assembly to the smoke baffle plate direction to form a lower air curtain.

Preferably, the balanced inner machine has a structure that the balanced inner machine comprises a casing, an impeller arranged in the casing and a motor for driving the impeller to rotate, the casing is hollow to form a balanced cavity, and the casing is provided with an air supplementing inlet for outdoor air to enter the balanced cavity and an air supplementing outlet for air in the balanced cavity to be discharged.

Preferably, in order to have a larger flow rate, play a better role in rectification and reduce wind noise, the impeller is a double-rotation impeller, the impeller comprises a primary impeller and a secondary impeller which are connected in series, and the primary impeller is positioned at the upstream of the secondary impeller on the air flow path.

Further, for having great flow, play better rectification effect, reduce wind and make an uproar, the one-level impeller includes first disk body and sets up the first rotor in first disk body axial both sides respectively, the second grade impeller includes the second disk body and sets up the second rotor in second disk body axial both sides respectively.

In order to guide air to enter and be discharged, the balance indoor unit further comprises an outer cover box arranged on the periphery of the shell and an air inlet cover arranged on the outer cover box, the outer cover box is opened at a position corresponding to the air supplementing air inlet, the air inlet cover is arranged at the opening of the outer cover box and can guide outdoor air into the balance cavity through the air supplementing air inlet, the air supplementing air outlet is communicated with fluid in the outer cover box, and the balance cavity is respectively communicated with the first balance outer unit and the second balance outer unit through the outer cover box.

Preferably, in order to form the air curtain above the front side of the panel assembly and the smoke barrier, the first balanced external unit includes a first coupler, a first outer shell and an outer cover, the first outer shell is in a hollow elongated shape and extends in the left-right direction, the first outer shell is disposed at the front end of the top of the housing, the first outer shell is in fluid communication with the balanced internal unit through the first coupler, the front side of the first outer shell is open, the outer cover is disposed at the opening of the first outer shell, and a first air outlet for blowing air is formed between the outer cover and the first outer shell.

Preferably, in order to facilitate the air to be blown downwards, the outer cover includes a first cover plate connected to the first housing and a second cover plate bent downwards and backwards from an end of the first cover plate away from the first housing, the second cover plate extends to a front side of a top end of the panel assembly and is spaced from the panel assembly, so that the first air outlet is formed between the second cover plate and a lower end of the opening at the front side of the first housing, and a first air guiding channel for guiding the air flow is formed between the second cover plate and the panel assembly.

In order to guide the air to flow out downwards from the back, a drainage propeller is fixedly arranged in the first shell and extends along the left-right direction.

Preferably, in order to form a lower air curtain below the smoke barrier on the front side of the panel assembly, the second balanced outdoor unit includes a second coupler, a second casing and an air guide duct, the second casing is in a hollow elongated shape and extends in the left-right direction, the second casing is disposed on the rear side of the lower end of the panel assembly, and the second casing is in fluid communication with the balanced indoor unit through the second coupler and the air guide duct; the bottom of the second shell is open to form a second air outlet for blowing air out, and the second air outlet is communicated with the outside of the shell in a fluid mode.

In order to facilitate the circulation of the second air outlet and the outside and guide the air flow blown out from the second air outlet to turn, the bottom of the shell is opened at a position corresponding to the second air outlet, so that the second air outlet is communicated with the fluid in the oil cup, the front side of the oil cup is positioned at the front side of the panel assembly, and a second air guide channel for guiding the air flow is formed between the front side of the oil cup and the front side of the panel assembly.

In order to facilitate heating of externally introduced air and guide rising oil smoke upwards, a noise-reducing hot air net capable of being electrified and heated is arranged in the second shell, and vent holes are formed in the noise-reducing hot air net.

Compared with the prior art, the invention has the advantages that: through setting up balancing unit, form decurrent last air curtain and ascending lower air curtain, form the air current protective screen through the effect of upper and lower air curtain, with suspension baffle interact, effectively guide the air current to inhale range hood and outwards escape, make the oil absorption cigarette effect promote greatly, effectively reduce the windage, the upper and lower air curtain of surplus gets into indoor realization air current and supplyes the realization and balance, the shortcoming of running the cigarette or indoor temperature suddenly drop when effectively having solved northern family's culinary art, it also can reach indoor outer pressure balance to make the culinary art process needn't open the window.

Drawings

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

FIG. 2 is a cross-sectional view of a range hood in accordance with an embodiment of the present invention;

fig. 3 is a schematic view of the balance device of the range hood of the embodiment of the present invention, the housing and the panel;

fig. 4 is a schematic view of a balancing device of a range hood according to an embodiment of the present invention;

fig. 5 is a sectional view of a balancing device of a range hood according to an embodiment of the present invention;

fig. 6 is an exploded schematic view of a balancing internal machine of the balancing device of the range hood according to the embodiment of the present invention;

fig. 7 is an exploded view of a first external balancer of the balancing device of the range hood according to the embodiment of the present invention;

fig. 8 is an exploded structural schematic view of a second external balancer of the balancing device of the range hood according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 and 2, a range hood is a side-draft range hood, and includes a housing 1, a panel assembly 2 disposed at a front side of the housing 1, and a fan system 3 disposed in the housing 1, an air inlet 21 is disposed on the panel assembly 2, the panel assembly 2 includes a panel support 22 and a panel 23 fixedly disposed at a front side of the panel support 22, and the panel 23 is generally made of glass. The front side of the panel component is provided with a smoke baffle 4, the smoke baffle 4 and the air inlet 21 are oppositely arranged at intervals, and the periphery of the smoke baffle 4 completely covers the air inlet 21, so that a suspension baffle structure is formed, and the effect of ring suction is achieved. The top of the shell 1 is provided with an air outlet cover 5 which is connected with an air outlet of the fan system 3 so as to discharge the oil smoke of the fan system 3. The bottom of the shell 1 is also provided with an oil cup 6 to collect the condensed oil flowing down from the shell 1 and the panel assembly 2. The above structure may adopt the prior art.

In order to balance the indoor and outdoor pressure without opening a window in the cooking process and improve the effect of oil smoke suction, the range hood further comprises a balancing device, and the balancing device comprises a balancing inner machine 71, a first balancing outer machine 72 and a second balancing outer machine 73. Referring to fig. 3 to 6, the balanced inner unit 71 is disposed on the top of the casing 1 and includes an impeller 711, a motor 712, a wheel disc 713, a casing 714, a collecting ring 715, an air inlet cover 716, and an outer cover tank 717. The housing 714 may be a spiral structure similar to a volute of a conventional centrifugal blower, and is hollow to form a balance chamber 7141. The top of the casing 714 is provided with an air supplement air inlet 7142, the side surface of the casing 714 is provided with an air supplement air outlet 7143, the bottom of the casing 714 is provided with an opening, the opening is fixed with the wheel disc 713, and the wheel disc 713 can be fixed with the casing 714 in a welding mode. The motor 712 and the impeller 711 are mounted on the disc 713 in a screw-fixing manner, so that when the motor 712 operates, the impeller 711 is rotated. The rotating shaft of the impeller 711 extends in the longitudinal direction, preferably in the vertical direction, in this embodiment, the impeller 711 is preferably a double-rotation impeller, and the flow rate of the double-rotation impeller is higher than that of a single-rotation impeller, so that a better rectification effect can be achieved, and wind noise can be reduced. The impeller 711 includes a primary impeller 7111 and a secondary impeller 7113 connected in series, the primary impeller 7111 being located above the secondary impeller 7112, i.e., in the air flow path, the primary impeller 7111 being located upstream of the secondary impeller 7112. The primary impeller 7111 is a main-flow impeller and is designed with double-sided first rotary wings 7112 which are respectively arranged on two sides of the first disk body 7115 in the axial direction (the axial direction of the impeller 711), wherein the total area of the first rotary wings 7112 on the upper side of the first disk body 7115 is S1, and the total area of the first rotary wings 7112 on the lower side of the first disk body 7115 is S2. The secondary impeller 7113 is a secondary flow impeller and is designed with double-sided second rotary wings 7114 which are respectively arranged on both sides of the second disk body 7116 in the axial direction (the axial direction of the impeller 711), the total area of the second rotary wings 7114 on the upper side of the second disk body 7116 is S3, and the total area of the second rotary wings 7114 on the lower side of the second disk body 7116 is S4. The first and second

rotary wings

7112 and 7114 are each in the form of guide vanes arranged at even intervals in the circumferential direction, each guide vane extending curvedly in the radial direction. The surface area relationship of the 4-surface rotor is 2S3< S2+ S4< S1; the two-stage impeller gap (distance in the axial direction) is H, 0.6R 2< H < 0.6R 1, where R1 is the main flow impeller radius and R2 is the secondary flow impeller radius.

The outer cover tank 717 is disposed on the outer periphery of the cabinet 714, the disk 713, and the motor 712, the top of the outer cover tank is opened at the same position as the air supplement inlet 7142, and a collecting ring 715 is disposed at the opening, the air inlet cover 716 is disposed at the opening on the top of the outer cover tank 717 and corresponds to the air supplement inlet 7142, so as to introduce the outside air into the cabinet 714, and the collecting ring 715 functions to smoothly guide the air introduced from the air inlet cover 716 into the cabinet 714. The air supply outlet 7143 is communicated with the fluid in the outer cover case 717, and the air can be discharged out of the outer cover case 717 through the air supply outlet 7143 on the shell 714.

Referring to fig. 7, the first balanced outer unit 72 includes a first coupler 721, a first casing 722 and an outer cover 723, the first casing 722 is in a hollow elongated shape, extends in the left-right direction, and is disposed at the top front end of the casing 1, the rear side of the first casing 722 is connected to the casing 717 through the first coupler 721, and the casing 717, the connection of the first casing 722 and the first coupler 721 are open, so that the casing 717 and the first casing 722 are in fluid communication. A drainage screw 724 is fixedly arranged in the first housing 722, and the drainage screw 724 extends along the left-right direction. The first housing 722 is open at the front side, the outer cover 723 is disposed at the opening of the first housing 722, and the outer cover 723 includes a first cover plate 7231 connected to the first housing 722 and a second cover plate 7232 bent downward and rearward from an end of the first cover plate 7231 remote from the first housing 722, the second cover plate 7232 extends to the front side of the top end of the panel 23 with a certain space from the panel 23, so that a first air outlet 725 is formed between the second cover plate 7232 and the lower end of the opening at the front side of the first housing 722. The space between the second cover 7232 and the panel 23 forms a first air guide channel 726.

Referring to fig. 8, the second balanced outdoor unit 73 includes a second coupler 731, a second casing 732, and a duct 733, the second coupler 731 is connected to a rear side of the casing tank 717 and has a substantially inverted L-shape, the duct 733 has a substantially L-shape, an upper end of a longitudinally extending portion of the duct 733 is connected to a lower end of the second coupler 731, a front end of a transversely extending portion of the duct 733 is connected to the second casing 732, and joints of the second casing 732, the duct 733, and the second coupler 731 are opened, so that the casing tank 717 and the second casing 732 are in fluid communication via the second coupler 731 and the duct 733. The second housing 732 is formed in a hollow elongated shape, extends in the left-right direction, and is disposed at the rear side of the lower end of the panel assembly 2. A noise reduction hot air net 734 is arranged in the second housing 732, a diamond-shaped vent 7341 is opened on the noise reduction hot air net 734, and the noise reduction hot air net 734 can be heated by electrifying. The bottom of the second housing 732 is open to form a second outlet 735. The bottom of the casing 1 is open at a position corresponding to the second air outlet 735, so that the second air outlet 735 is communicated with the fluid in the oil cup 6. The front side of the oil cup 6 is located in front of the panel 23, and a second air guide passage 736 is formed by the front side of the oil cup 6 and the panel 23 with a space therebetween.

When the range hood works, the fan system 3 works, the motor 712 in the balance inner machine 71 works to drive the impeller 711 to rotate through joint control, and the vortex airflow is formed in the balance cavity by gradually pressurizing in the operation process; the balanced inner unit 71 continuously introduces the outdoor air into the air inlet cover 716, passes through the collector 715 and into the balanced chamber 7141, and then passes through the first and

second couplings

721 and 731 and into the first and

second housings

722 and 732, respectively.

Because the fixed guide screw 724 is installed in the first housing 722, the outdoor cold air flow is guided to the panel assembly 2 along the surface of the guide screw 724 and sinks along the surface of the panel 23 through the first air outlet 725 and the first air guide channel 726, so as to form an upper air curtain; because the noise reduction hot air net 734 is installed in the second housing 732, the outdoor cold air is heated by the noise reduction hot air net 734 and then rises along the surface of the panel 23 through the second air outlet 735 and the second air guide channel 736 to form a lower air curtain; when oil smoke is generated, the hot air of the lower air curtain guides the oil smoke to enter the lower edge of the smoke baffle plate 4 and is sucked into the fan system 3 of the range hood, the cold air of the upper air curtain guides the rising oil smoke to enter the upper edge of the smoke baffle plate 4 and is sucked into the fan system 3 of the range hood, and an air flow barrier is formed under the action of the upper air curtain and the lower air curtain, so that the oil smoke is guided in at an accelerated speed and does not escape outwards. The upper air curtain and the lower air curtain form an air flow barrier, the part of the air flow barrier sucked by the fan system 3 occupies a small part of the upper air curtain and the lower air curtain, and the rest part of the air flow barrier enters the room to realize air flow supplement and balance.

In the process, the fan system 3 of the range hood continuously extracts air polluted by oil smoke from the indoor, and the inner machine and the outer machine of the balancing device continuously feed fresh air from the outdoor for supplement, so that indoor air pressure balance is formed.

Claims

1. The utility model provides a range hood, includes casing (1) and panel components (2) of setting in casing (1) front side, air intake (21) have been seted up on panel components (2), the front side of panel components (2) is provided with keeps off cigarette board (4), keep off cigarette board (4) and air intake (21) interval ground mutual disposition and form the structure of suspension baffle, its characterized in that: the range hood further comprises a balancing device, wherein the balancing device comprises a balancing inner machine (71) for introducing outdoor air, a first balancing outer machine (72) for blowing the air introduced by the balancing inner machine (71) from the top end of the panel assembly (2) to the smoke baffle plate (4) to form an upper air curtain, and a second balancing outer machine (73) for blowing the air introduced by the balancing inner machine (71) from the bottom end of the panel assembly (2) to the smoke baffle plate (4) to form a lower air curtain.

2. The range hood of claim 1, wherein: the balance inner machine (71) comprises a machine shell (714), an impeller (711) arranged in the machine shell (714) and a motor (712) used for driving the impeller (711) to rotate, wherein the machine shell (714) is hollow to form a balance cavity (7141), and an air supplementing air inlet (7142) for outdoor air to enter the balance cavity (7141) and an air supplementing air outlet (7143) for air in the balance cavity (7141) to be discharged are formed in the machine shell (714).

3. The range hood of claim 2, wherein: the impeller (711) is a double-rotation impeller, the impeller (711) comprises a primary impeller (7111) and a secondary impeller (7113) which are connected in series, and the primary impeller (7111) is located at the upstream of the secondary impeller (7113) on the air flow path.

4. The range hood of claim 3, wherein: one-level impeller (7111) includes first disk body (7115) and sets up first rotor (7112) in first disk body (7115) axial both sides respectively, second level impeller (7113) includes second disk body (7116) and sets up second rotor (7114) in second disk body (7116) axial both sides respectively.

5. The range hood of claim 2, wherein: the balanced inner machine (71) further comprises an outer cover box (717) arranged on the periphery of the machine shell (714) and an air inlet cover (716) arranged on the outer cover box (717), the outer cover box (717) is opened at a position corresponding to the air supplementing air inlet (7142), the air inlet cover (716) is arranged at the opening of the outer cover box (717) and can introduce outdoor air into the balanced cavity (7141) through the air supplementing air inlet (7142), the air supplementing air outlet (7143) is communicated with fluid in the outer cover box (717), and the outer cover box (717) enables the balanced cavity (7141) to be respectively communicated with the first balanced outer machine (72) and the second balanced outer machine (73) through fluid.

6. The range hood of claim 1, wherein: the first balanced outer machine (72) comprises a first coupler (721), a first outer shell (722) and an outer cover (723), wherein the first outer shell (722) is in a hollow elongated shape and extends in the left-right direction, the first outer shell (722) is arranged at the front end of the top of the shell (1), the first outer shell (722) is in fluid communication with the balanced inner machine (71) through the first coupler (721), the front side of the first outer shell (722) is open, the outer cover (723) is arranged at the opening of the first outer shell (722), and a first air outlet (725) for blowing air is formed between the outer cover (723) and the first outer shell (722).

7. The range hood of claim 6, wherein: the outer cover (723) comprises a first cover plate (7231) connected with the first shell (722) and a second cover plate (7232) bent downwards and backwards from one end of the first cover plate (7231) far away from the first shell (722), wherein the second cover plate (7232) extends to the front side of the top end of the panel assembly (2) and is spaced from the panel assembly (2), so that the first air outlet (725) is formed between the second cover plate (7232) and the lower end of the opening at the front side of the first shell (722), and a first air guide channel (726) for guiding air flow is formed between the second cover plate (7232) and the panel assembly (2).

8. The range hood of claim 7, wherein: a drainage propeller (724) is fixedly arranged in the first shell (722), and the drainage propeller (724) extends along the left-right direction.

9. The range hood of claim 1, wherein: the second balanced outdoor unit (73) comprises a second coupler (731), a second shell (732) and an air guide pipe (733), the second shell (732) is in a hollow long strip shape and extends in the left-right direction, the second shell (732) is arranged on the rear side of the lower end of the panel assembly (2), and the second shell (732) is communicated with the balanced indoor unit through the second coupler (731) and the air guide pipe (733); the bottom of the second shell (732) is open to form a second air outlet (735) for blowing air out, and the second air outlet (735) is communicated with the outside of the shell (1) in a fluid mode.

10. The range hood of claim 9, wherein: the bottom of the shell (1) is opened at a position corresponding to the second air outlet (735), so that the second air outlet (735) is communicated with the fluid in the oil cup (6), the front side of the oil cup (6) is positioned at the front side of the panel assembly (2), and a second air guide channel (736) for guiding air flow is formed between the front side of the oil cup (6) and the front side of the panel assembly (2).

11. The range hood of claim 9, wherein: a noise reduction hot air net (734) capable of being heated by electrifying is arranged in the second shell (732), and a vent hole (7341) is formed in the noise reduction hot air net (734).