CN112178717A

CN112178717A - Fume exhaust fan

Info

Publication number: CN112178717A
Application number: CN202010980855.0A
Authority: CN
Inventors: 唐兴旺; 袁柯铭
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-01-05
Anticipated expiration: 2040-09-17
Also published as: CN112178717B

Abstract

The invention discloses a range hood, which comprises a shell, a panel assembly arranged on the front side of the shell, a fan system and a smoke baffle plate, wherein the fan system and the smoke baffle plate are arranged in the shell, the panel assembly comprises a panel support and a panel arranged on the front side of the panel support, a main air inlet is formed in the panel support, the fan system is provided with a fan air inlet corresponding to the main air inlet, the panel support is at least sunken towards the direction in the shell from the main air inlet, a notch is formed in the upper edge of the panel, and is communicated with the main air inlet in a fluid mode, the range hood further comprises a flow guide assembly, the flow guide assembly comprises a flow guide plate arranged between the panel and the main air inlet, the flow guide plate comprises a flow guide part corresponding to the. Compared with the prior art, the invention has the advantages that: the guide plate is arranged at the gap for ventilation of the panel, and the gap can be opened or closed by the guide plate, so that the peculiar smell in the range hood can be prevented from being dispersed into a kitchen when the range hood is in a non-working state.

Description

Fume exhaust fan

Technical Field

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

Background

With the continuous pursuit of healthy and environment-friendly living states, people pay more and more attention to the indoor air quality. The building materials for new house decoration usually release gases harmful to human bodies such as formaldehyde for a long time, the carbon dioxide concentration in a room can be increased after the building materials are used for a long time, the human health is affected, the humidity is increased, and bacteria grow in furniture and clothes to cause mildewing and the like.

As a traditional household appliance with indoor air purification capability, a range hood has been continuously introduced in the industry as a product with ventilation function (sucking outdoor fresh air into the room, and exhausting indoor harmful gas out of the room). The range hood with the ventilation function disclosed in the chinese patent with application number 201320589372.3 comprises a chassis, a fan system arranged on the chassis, an ultra-low speed governor for controlling the rotation speed of a motor of the fan system to be 200 r/min-400 r/min, and a timing switch for starting the motor of the fan system at regular intervals, wherein the chassis is provided with an air inlet; the ultra-low speed governor and the timing switch are both connected with a motor of the fan system.

However, the service life of the range hood is to quickly suck and exhaust the oil smoke generated in the cooking process, and in order to ensure good smoking effect, the smoke baffle plate is usually opened to form a cage smoke cavity and expose the air inlet, so that great noise is generated in the working process of the range hood, the ventilation function of the range hood has the defect of large noise, and particularly, the sleep of people is influenced during ventilation at night. The common practice in the industry is to reduce the rotating speed of the fan, and although the reduction of the rotating speed of the fan can reduce noise, the air quantity is reduced at the same time, and the ventilation effect is influenced.

In addition, in order to make the oil smoke arrange outward fast, promote the oil absorption cigarette effect, there is a way to increase supplementary inlet air channel. For example, chinese patent application No. 201610543688.7 discloses a range hood with an auxiliary air inlet channel, which can make up the shortcoming that a main air inlet is discontinuous by providing an elongated and transversely penetrating auxiliary air inlet, and the auxiliary air inlet can increase the air inlet area and change the oil smoke path, so that more oil smoke can be sucked in the same time, and the oil smoke which easily escapes from the outer edge of a filter screen plate can be pulled back to be captured. Because the auxiliary air inlet ejects the existence of the effect, the phenomena of weakened negative pressure and oil smoke escape caused by the fact that the inclination angle of the smoke guide plate relative to the horizontal plane is reduced can be effectively overcome, and therefore the smoking effect is improved.

However, the oil filter plate and the smoke guide plate which form the auxiliary air inlet channel are both straight plates, and the oil filter plate and the smoke guide plate form a certain included angle, because the air has viscosity, a flow field can form a boundary layer on the surface of an object, when high-flow-rate inlet air passes through the flow channel, the air flow can not be well attached to the interface of fluid and the object, so that the boundary layer is separated, vortex can be generated on the back of the smoke guide plate, the generation of the vortex causes the increase of air flow resistance, the aggravation of flow loss and the increase of noise.

The injection effect of the auxiliary air inlet in the prior art is ensured, the core of the injection effect is to form stable high flow rate of the auxiliary air inlet, the flow rate is realized by arranging the same inner negative pressure cavity shared with the main air inlet and distributing the inlet of the negative pressure cavity, and the injection effect is influenced by the drag of the main air inlet.

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, which can realize low-noise ventilation with small flow loss and blocking the emission of internal peculiar smell.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the casing, sets up panel components, the fan system of setting in the casing and keep off the cigarette board in the casing front side, panel components includes panel support and sets up the panel in panel support front side, the main air intake has been seted up on the panel support, the fan system has the fan air intake that corresponds with main air intake, its characterized in that: the panel support is sunken to the direction in the casing at least in main air intake department, the last edge of panel is provided with the breach, breach and main air intake fluid intercommunication, range hood still includes the water conservancy diversion subassembly, the water conservancy diversion subassembly is including setting up the guide plate between panel and main air intake, the guide plate includes the water conservancy diversion portion that corresponds with the breach, the breach can selectively be opened or closed to the water conservancy diversion portion.

Preferably, in order to facilitate the communication between the notch and the main air inlet, the lower edge of the smoke barrier in the closed state is higher than the lower edge of the main air inlet, the upper edge of the panel is higher than the lower edge of the main air inlet, and the smoke barrier and the panel can close the main air inlet together.

In order to shield oil stains in the range hood conveniently, the highest point of the flow guide part is higher than the lowest point of the smoke baffle in the closed state, and the lowest point of the flow guide part is lower than the lowest point of the notch.

In order to reflect the noise of the fan system and reduce the noise during air exchange, the projection of the diversion part on the fan air inlet of the fan system covers the projection of the notch on the fan air inlet of the fan system.

In order to reduce fluid dynamic pressure and increase fluid static pressure, the dynamic pressure is reduced and the noise is reduced, the static pressure is increased and the flow loss of fluid is reduced, a channel between the main air inlet and the flow guide part forms an auxiliary air inlet channel, the upper end of the auxiliary air inlet channel corresponding to the flow guide part is an inlet of the auxiliary air inlet channel, the lower end of the auxiliary air inlet channel corresponding to the flow guide part is an outlet of the auxiliary air inlet channel, and the auxiliary air inlet channel is communicated with the air inlet of the fan in a fluid mode.

In order to adjust the auxiliary air inlet channel according to the oil smoke volume, the flow guide part and the panel component are rotatably arranged, so that the size of the auxiliary air inlet channel is adjusted while the notch is opened and closed.

For avoiding at supplementary inlet air channel during operation pressure release, storing the grease that the range hood during operation flowed down simultaneously, the guide plate is still including the flexible oil bar that keeps off that is located water conservancy diversion portion below, thereby the oil bar can rotate along with water conservancy diversion portion can with the panel towards one side butt in the casing or leave the panel, during oil bar and panel butt, constitute between oil bar and panel and lead the oil groove.

In order to facilitate the rotating connection of the guide plate, the guide assembly further comprises bases arranged on one side of the panel facing the shell, the bases are provided with two bases which are respectively arranged on the left side and the right side of the guide plate, and the guide plate is rotatably connected with the bases through rotating shafts.

According to one aspect of the invention, the diversion assembly further comprises a movement mechanism for driving the rotation shaft to rotate, wherein the movement mechanism comprises a motor and a synchronous belt, and the synchronous belt is wound on an output shaft of the motor and the rotation shaft and can transmit the output of the motor to the rotation shaft.

According to another aspect of the invention, the flow guide assembly further comprises a movement mechanism for driving the rotation shaft to rotate, the movement mechanism comprises an electric push rod and a connecting rod, one end of the connecting rod is rotatably connected to the output end of the electric push rod, and the other end of the connecting rod is rotatably connected with one side, facing the shell, of the flow guide plate.

Compared with the prior art, the invention has the advantages that: the guide plate is arranged at the gap for air exchange of the panel, so that a better gas wall attachment effect can be realized, laminar flow is increased, turbulent flow is reduced, smaller resistance on gas is ensured, the smoking effect can be improved, the flow loss of the gas is reduced, and noise is reduced; the guide plate can open or close the notch, so that the peculiar smell in the range hood can be prevented from being dispersed into a kitchen when the range hood is in a non-working state, and the use experience is improved; the guide plate completely covers the notch in the vertical direction, so that the attractiveness can be improved, and oil stains in the range hood can be blocked; the projection of the guide plate at the air inlet of the fan system completely covers the notch, so that the guide plate can reflect the noise of the fan system, the noise generated by the fan system is not easy to be transmitted from the notch, and the noise during air exchange is reduced; the auxiliary air inlet channel between the flow guide part and the air inlet is adjustable, so that different oil smoke amounts can be adapted, and the auxiliary air inlet channel can keep high flow velocity and can capture oil smoke; through setting up the oil baffle strip, can avoid supplementary inlet air channel pressure release, can be used for storing the grease again.

Drawings

Fig. 1 is a schematic view of a range hood according to a first embodiment of the present invention in a closed state;

FIG. 2 is a schematic view of a hidden smoke barrier of a range hood according to a first embodiment of the present invention;

fig. 3 is a partial schematic view of a flow guide assembly and a panel of a range hood according to a first embodiment of the present invention;

FIG. 4 is a cross-sectional view of FIG. 1;

FIG. 5 is an enlarged view of a portion I of FIG. 4;

fig. 6 is a sectional view of the range hood according to the first embodiment of the present invention in a ventilation state;

FIG. 7 is an enlarged view of portion II of FIG. 6;

FIG. 8 is a sectional view of the range hood according to the first embodiment of the present invention illustrating an auxiliary intake state;

FIG. 9 is an enlarged view of a portion III of FIG. 8;

FIG. 10 is a partial schematic view of a flow guide assembly and a panel of a range hood according to a second 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.

Example one

Referring to fig. 1 to 5, a range hood is a side-draft range hood, and includes a housing 1, a front side of the housing 1 is open, a panel assembly 2 is disposed at the open of the housing 1, and a fan system 3 is disposed in the housing 1. The fan system 3 has a fan inlet 31.

The panel assembly 2 includes a panel support 21 and a panel 22 disposed on the front side of the panel support 21, the panel support 21 is provided with a main air inlet 23, the panel 22 is located below the main air inlet 23, and the fan air inlet 31 corresponds to the main air inlet 23 and is located on the rear side of the main air inlet 23. The smoke baffle plate 4 is arranged on the panel component 2 corresponding to the main air inlet 23, and the smoke baffle plate 4 can turn over relative to the panel component 2, so that the main air inlet 23 is opened or closed. The main air inlet 23 is provided with a filter screen 24. The fan system 3 is in fluid communication with the primary air inlet 23 such that the fan system 3 may draw in oil smoke or air through the primary air inlet 23 when operating. When the smoke barrier 4 is in the closed state, the lower edge of the smoke barrier 4 is higher than the lower edge of the main air inlet 23, and the upper edge of the panel 22 is higher than the lower edge of the main air inlet 23, so that the main air inlet 23 is closed by the smoke barrier 4 and the panel 22 together. Like the existing range hood, an oil guide plate 8 is further disposed between the fan air inlet 31 of the fan system 3 and the panel assembly 2, so that oil smoke entering from the main air inlet 23 can only enter the fan air inlet 31 of the fan system 3 through the oil guide plate 8.

In the present embodiment, the panel bracket 21 is recessed toward the inside of the housing 1 at least at the main intake vent 23. The upper edge of the panel 22 is provided with at least one notch 221, the notch 221 is in fluid communication with the main air inlet 23, so that when the smoke barrier 4 is in a closed state, the fan system 3 can still be communicated with the outside of the range hood, and air flow can enter the main air inlet 23 from the notch 221, thereby realizing the ventilation function.

The range hood further comprises a flow guide assembly, the flow guide assembly comprises a flow guide plate 5, the flow guide plate 5 is located between the panel 22 and the filter screen 24 (the main air inlet 23), the flow guide plate 5 comprises an oil baffle strip 51 and a flow guide part 52, the oil baffle strip 51 is located below the flow guide part 52 and is preferably integrally formed, and the flow guide part 52 corresponds to the notch 221. The oil bar 51 is made of flexible material, such as rubber, silica gel, etc. A rotation shaft 53 is provided at a connection of the oil bar 51 and the guide 52, and the rotation shaft 53 extends in the left-right direction. The guide assembly further comprises a base 6 and a moving mechanism, the base 6 is arranged on one side of the panel 22 facing the inside of the shell 1, the number of the base 6 is two, the two bases are respectively located at two axial ends of the rotating shaft 53, and the moving mechanism is arranged on one base 6. Wherein, base 6 is connected with panel 22 fixedly, and the both ends of axis of rotation 53 are connected with base 6 is rotated. The moving mechanism comprises a motor 71 and a timing belt 72, the motor 71 is fixed with the bases 6 and can be arranged on one side of one of the bases 6 facing the other base 6, an output shaft 711 of the motor 71 extends out of one side of the base 6 far away from the other base 6, the end part of the rotating shaft 53 extends out of the same base 6, and the output shaft 711 and the rotating shaft 53 are arranged on the part of the base 6 far away from the other base 6 and are wound with the timing belt 72. When the motor 71 is started, the rotating shaft 53 can be driven to rotate by the timing belt 72, so that the deflector 5 rotates. Alternatively, teeth may be provided on the outer periphery of each shaft, and the timing belt 72 and each shaft are linked by meshing of the teeth. The two sides of the guide plate 5 are movably connected with the base 6 through the rotating shaft 53, so that the two sides of the guide plate 5 are sealed, and pressure relief is prevented.

Referring to fig. 4 and 5, when the range hood is turned off, the smoke baffle 4 closes the main air inlet 23, the flow guide part 52 blocks at the notch 221, the air flow cannot enter the casing 1 from the notch 221, the flow guide plate 5 is in an initial state, the isolation and blocking of the inside and the kitchen of the range hood are realized at the moment, further, the peculiar smell in the inside of the range hood cannot be diffused into the kitchen, and the flow guide plate 5 plays a role in blocking the inside and the outside of the range hood.

Referring to fig. 6 and 7, the upper end of the guiding portion 52 rotates to abut against the filter screen 24 (or the main air inlet 23), the lower end of the oil baffle 51 rotates to abut against one side of the panel 22 facing the inside of the housing 1, the guiding plate 5 is in a state of being opened to the maximum, the range hood is in a ventilation state at this time, and the smoke baffle 4 does not need to be opened. The deflector 5 may shield and reflect noise generated by the blades of the fan system 3. The height of the notch 221 in the vertical direction is A, the height of the flow guide part 52 in the vertical direction is larger than that of the notch 221 in the closed state of the smoke baffle plate 4, the highest point of the flow guide part 52 is higher than the lowest point of the smoke baffle plate 4 in the closed state, and the lowest point of the flow guide part 52 is lower than the lowest point of the notch 221, so that the attractiveness in the horizontal direction of the front side is met, and the internal oil stain of the range hood is shielded. The projection of the diversion part 52 on the fan inlet 31 of the fan system 3 covers the projection of the notch 221 on the fan inlet 31 of the fan system 3, so that the noise generated by the fan system 3 can be shielded and reflected. Under keeping off cigarette board 4 closed condition, fan system 3 work produces the noise, keeps off cigarette board 4 and has played the effect of keeping apart and reflection part noise, simultaneously because guide plate 5 shelters from and reflects fan system 3 noise for the noise that fan system 3 produced is difficult to spread from breach 221, so the noise when opening the function of taking a breath is lower relatively. The arrows of fig. 6 show the gas flow path during ventilation.

Referring to fig. 8 and 9, when the range hood is in operation, the baffle 5 is turned inward, and a gap is formed between the baffle and the filter screen 24 (the main air inlet 23), the gap is an auxiliary air inlet channel Q1, the upper end of the auxiliary air inlet channel Q1 corresponding to the flow guide part 52 is an inlet of an auxiliary air inlet channel Q1, and the lower end of the auxiliary air inlet channel Q1 corresponding to the flow guide part 52 is an outlet of an auxiliary air inlet channel Q1. A ventilation opening (not shown) is formed in the panel bracket 21 below the filter screen (main air inlet 23). The oil smoke passes through the ventilation opening opened on the panel bracket 21 from the space between the filter screen 24 and the flow guide part 52 downwards along the front side of the filter screen 24 to enter the space on the front side of the fan system 3 in the housing 1, and then enters the fan system 3, namely, the ventilation opening fluidly communicates the auxiliary air intake passage Q1 with the fan air inlet 31. Alternatively, other methods may be used to fluidly connect the auxiliary inlet duct Q1 to the fan inlet 31. Meanwhile, the oil baffle strip 51 is turned to the panel 22 and is abutted against the panel 22, and an oil storage groove 54 is formed between the two. According to a fluid continuity equation, Q is S V, wherein Q is flow, S is air inlet area, and V is wind speed. That is, when the flow rate is constant, S decreases and V increases. In the invention, the size of the S (the size of the section of the auxiliary air inlet channel Q1) can be adjusted by the guide plate 5, thereby realizing the change of V. For example, when the amount of oil smoke is large, S (the guide part 52 is turned over toward the filter screen 24) is appropriately reduced, V is raised, and the wind speed at the inlet of the auxiliary air inlet channel Q1 (the gap between the upper end of the guide part 52 and the filter screen 24) can be effectively realized, so that the oil smoke is captured, the oil smoke path is changed, and the smoking effect is improved. When the oil smoke volume is less, need not the help of supplementary inlet air duct Q1, main air inlet 23 just can realize better smoking effect, can suitably increase S (water conservancy diversion portion 52 is to panel 22 direction upset) this moment, and the area of air inlet increases this moment, and the front end resistance of fan system 3 reduces promptly, and under the same flow, because the resistance reduces, fan system rotational speed descends, and the noise descends.

Through setting up oil baffle strip 51, block gaseous pressure release (that is negative pressure leaks from the clearance between axis of rotation 53 and the panel 22) on the one hand, the wind speed of the import of supplementary inlet air duct Q1 has been guaranteed, on the other hand oil baffle strip 51 and panel 22 between have formed oil storage tank 54, this oil storage tank 54 realizes the interim oil storage (the oil that flows down from water conservancy diversion portion 52 front surface) when cooking, after range hood closes, water conservancy diversion portion 52 closes breach 221, oil baffle strip 51 and panel 22 separation, the greasy dirt release in the oil storage tank 54, it goes to in the oil cup to flow along the panel.

Example two

Referring to fig. 10, unlike the first embodiment, in the present embodiment, the moving mechanism includes an electric push rod 73 and a link 74 instead of the motor 71 and the timing belt 72 of the first embodiment. The electric push rod 73 is fixed in the casing 1, one end of a connecting rod 74 is rotatably connected to the output end of the electric push rod, and the other end of the connecting rod 74 is rotatably connected with one side of the guide plate 5 facing the inside of the casing 1. The rotation shaft of the link 74 extends in the left-right direction. Therefore, the guide plate 5 can be driven to rotate by the extension and contraction of the output end of the electric push rod 73.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.

Claims

1. The utility model provides a range hood, includes casing (1), sets up panel components (2) at casing (1) front side, sets up fan system (3) and keep off cigarette board (4) in casing (1), panel components (2) are including panel support (21) and panel (22) of setting in panel support (21) front side, main air intake (23) have been seted up on panel support (21), fan system (3) have fan air intake (31) that correspond with main air intake (23), its characterized in that: the range hood is characterized in that the panel support (21) is at least recessed towards the direction in the shell (1) at the position of the main air inlet (23), a notch (221) is formed in the upper edge of the panel (22), the notch (221) is communicated with the fluid of the main air inlet (23), the range hood further comprises a flow guide assembly, the flow guide assembly comprises a flow guide plate (5) arranged between the panel (22) and the main air inlet (23), the flow guide plate (5) comprises a flow guide part (52) corresponding to the notch (221), and the notch (221) can be selectively opened or closed by the flow guide part (52).

2. The range hood of claim 1, wherein: the lower edge of the smoke baffle (4) in the closed state is higher than the lower edge of the main air inlet (23), the upper edge of the panel (22) is higher than the lower edge of the main air inlet (23), and the smoke baffle (4) and the panel (22) can be closed together with the main air inlet (23).

3. The range hood of claim 2, wherein: the highest point of the flow guide part (52) is higher than the lowest point of the smoke baffle plate (4) in a closed state, and the lowest point of the flow guide part (52) is lower than the lowest point of the notch (221).

4. The range hood of claim 1, wherein: the projection of the diversion part (52) on the fan air inlet (31) of the fan system (3) covers the projection of the notch (221) on the fan air inlet (31) of the fan system (3).

5. The range hood according to any one of claims 1 to 4, wherein: the passageway between main air intake (23) and water conservancy diversion portion (52) constitutes supplementary inlet air channel (Q1), supplementary inlet air channel (Q1) correspond the import that water conservancy diversion portion (52) upper end was supplementary inlet air channel (Q1), supplementary inlet air channel (Q1) correspond the export that water conservancy diversion portion (52) lower extreme was supplementary inlet air channel (Q1), supplementary inlet air channel (Q1) and fan air intake (31) fluid intercommunication.

6. The range hood of claim 5, wherein: the guide part (52) is rotatably provided with the panel assembly (2) so as to adjust the size of the auxiliary air intake passage (Q1) while opening and closing the notch (221).

7. The range hood of claim 6, wherein: guide plate (5) still include flexible oil baffle strip (51) that is located water conservancy diversion portion (52) below, thereby oil baffle strip (51) can rotate along with water conservancy diversion portion (52) and can with panel (22) towards one side butt in casing (1) or leave panel (22), during oil baffle strip (51) and panel (22) butt, constitute between oil baffle strip (51) and panel (22) and lead oil groove (54).

8. The range hood of claim 6, wherein: the flow guide assembly further comprises a base (6) arranged on one side of the panel (22) facing the inside of the shell (1), the base (6) is provided with two flow guide plates (5) and arranged on the left side and the right side of the flow guide plates (5), and the flow guide plates (5) are rotatably connected with the base (6) through rotating shafts (53).

9. The range hood of claim 8, wherein: the flow guide assembly further comprises a movement mechanism for driving the rotating shaft (53) to rotate, the movement mechanism comprises a motor (71) and a synchronous belt (72), and the synchronous belt (72) is wound on an output shaft (711) of the motor (71) and the rotating shaft (53) and can transmit the output of the motor (71) to the rotating shaft (53).

10. The range hood of claim 8, wherein: the water conservancy diversion subassembly is still including being used for driving axis of rotation (53) pivoted motion, motion includes electric putter (73) and connecting rod (74), the rotation is connected with the one end of connecting rod (74) on the output of electric putter (73), the other end and guide plate (5) rotate towards one side in casing (1) and are connected.