CN114763916B - Fume exhaust fan - Google Patents

Abstract

The invention discloses a range hood, which comprises a first shell and a second shell, wherein the first shell and the second shell are communicated through fluid, a power device is arranged in the second shell and comprises two fan systems which are arranged in parallel, the bottom of the first shell is provided with a first suction port and a second suction port, the first suction port is provided with two air inlets which are positioned at the left side and the right side of the second suction port, each fan system is provided with a first fan air inlet and a second fan air inlet, the first fan air inlets of the two fan systems are far away from each other, the second fan air inlets of the two fan systems are close to each other, each first fan air inlet is positioned above the corresponding first suction port, and the two second fan air inlets are positioned above the second suction port. Compared with the prior art, the invention has the advantages that: the air inlet cavities on the left side and the right side correspond to the air inlets of the fan system, so that oil smoke can be gathered towards the center, the smoke gathering capacity on the left side and the right side is improved, and the oil smoke is prevented from escaping towards the side face.

Description

Fume exhaust fan

Technical Field

The invention relates to the field of oil smoke purification, 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.

Most of the existing range hoods are arranged above the hanging cabinets, occupy the space at the upper part of a kitchen, but the size difference of different hanging cabinets is large, so that the installation of the range hood is limited. At present, common range hoods in the market comprise a top-suction type range hood, a side-suction type range hood and a bottom-suction type range hood, wherein the top-suction type range hood is easy to leak smoke when the oil smoke amount is large because the installation height is relatively high, and the bottom-suction type range hood or the side-suction type range hood adopts a suction inlet downward moving scheme.

In order to solve the problems, the air volume is mainly increased or the width of the whole machine is lengthened at present. However, the solution for improving the air volume and lengthening the width of the whole machine has the following disadvantages:

1. the lifting of the air volume brings noise and influences indoor heat balance and the like.

2. The whole machine is lengthened, the installation applicability is poor, meanwhile, the width is lengthened, and the improvement of the oil fume suction effect is limited.

There has been a range hood of many inlet air passageways at present, like the big suction lampblack absorber that chinese patent application No. 201520806136.1 disclosed, including the lampblack absorber main part, lampblack absorber main part upper end middle part is equipped with the outlet flue, inside first baffle, the second baffle of being equipped with of lampblack absorber main part, first baffle, second baffle divide into first passageway, second passageway and third passageway with the inside lampblack absorber main part, be equipped with first induced-draft fan in the first passageway, be equipped with second induced-draft fan in second passageway, the third passageway, be equipped with the filter screen on first passageway, second passageway and the third passageway lower extreme, threaded connection between oil filter screen and first passageway, second passageway and the third passageway lower extreme.

The arrangement mode of the fan is not matched with the air inlet mode of the air inlet, the oil smoke cannot be gathered to the center, the air inlet is not designed according to the kitchen range in a targeted mode, three air inlet channels are not fully utilized, and therefore further improvement is needed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, so that the cooking experience of a user is not influenced while the oil smoke absorption 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 first casing and the second casing of setting above first casing, fluid intercommunication between first casing and the second casing, be equipped with power device in the second casing, power device includes two fan systems of parallel arrangement, first suction opening and second suction opening have been seted up to the bottom of first casing, first suction opening has two and is located the left and right sides of second suction opening, its characterized in that: every fan system is the two air inlet fans that extend about the axial, and every fan system has first fan air intake and second fan air intake, and the first fan air intake of two fan systems is kept away from each other, and the second fan air intake of two fan systems then is close to each other, and every first fan air intake is located corresponding first suction inlet top, and two second suction inlets then are located second fan air intake top.

In order to facilitate the matching of a main air inlet of the fan system and a main suction inlet of the whole range hood, and the matching of an auxiliary air inlet of the fan system and an auxiliary suction inlet of the whole range hood, the first fan air inlet is the main air inlet of the fan system, and the second fan air inlet is the auxiliary air inlet of the fan system.

In order to smoothly guide the oil smoke entering from the first suction port to the first fan air inlet, the first shell comprises first side plates respectively arranged on the left side and the right side, and the two first side plates are upwards obliquely extended oppositely from the bottom end until being connected with the second shell.

In order to adapt to pots such as a relatively high steamer and the like conveniently, to suck steam and reduce the diffusion of the steam, the second suction inlet is higher than the first suction inlet.

In order to facilitate guiding the oil smoke to enter the second suction port when the oil smoke is disturbed and escapes, the part of the bottom of the first shell, which is positioned between each first suction port and the second suction port, forms a second side plate, and each second side plate gradually inclines upwards from the first suction port to the second suction port, so that a space which is contracted from bottom to top is formed between the two second side plates.

In order to increase the air inlet area, the front side and the rear side of each suction inlet extend to the corresponding front side and the corresponding rear side of the bottom of the first shell.

In order to facilitate preliminary filtering of the oil smoke, a grille is arranged at the first suction port.

Preferably, in order to avoid noise caused by collision of oil smoke on two sides, the two fan systems are arranged in a central symmetry mode.

Compared with the prior art, the invention has the advantages that: the three suction ports are arranged to face the cooking centers of the three cooking ranges, the double fans are arranged in parallel, each fan is a double air inlet fan, and air inlet cavities on the left side and the right side correspond to air inlets of a fan system, so that oil smoke can be gathered towards the center, the smoke gathering capacity on the left side and the right side is improved, the escape of the oil smoke towards the side is reduced, the effect of oil smoke absorption is ensured, and the cooking operation experience of a user is not influenced; two main air inlets of the fan system are distributed on the left side and the right side, an auxiliary air inlet is arranged in the middle and matched with an air inlet form at the bottom of the first shell, the main air inlet of the fan is matched with a main suction inlet of the whole machine, and the auxiliary air inlet is matched with an auxiliary suction inlet of the whole machine, so that the control of inner flow and outer flow is realized together; multiple oil smoke separation promotes the grease separation degree, promotes oil smoke purifying effect, increases the life of fan.

Drawings

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

fig. 2 is a schematic view of the range hood according to the embodiment of the present invention from bottom to top;

fig. 3 is a sectional view (left-right direction section) of the range hood according to the embodiment of the present invention;

fig. 4 is a sectional top view (front-rear section) of the range hood according to the embodiment of the present invention;

fig. 5 is a schematic view of a fan system of the range hood according to the embodiment of the present invention;

fig. 6 is a schematic view of an installation state 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 "center," "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 orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity of description, and do not 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 only and are not to be construed as limiting, for example, "upper" and "lower" are not necessarily limited to directions opposite 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 to 3, a range hood includes a first housing 1, a second housing 2, a power device 3, and an air outlet device 4.

The first housing 1 is disposed below the second housing 2, and the two housings may be separate components and connected to each other, or may be an integrally formed integral component. The first casing 1 and the second casing 2 are both hollow structures, and the top end of the first casing 1 is open, the bottom end of the second casing 2 is open, the first casing 1 is connected with the bottom end of the second casing 2 at the top end, and therefore the first casing 1 and the second casing 2 are in fluid communication. Preferably, the top end of the first housing 1 and the bottom end of the second housing 2 are the same size, and are connected at the edges.

The bottom of the first casing 1 is opened with a first suction port 11 and a second suction port 12, wherein the first suction port 11 has two ports respectively located at the left and right sides of the second suction port 12, and the second suction port 12 is preferably located at the middle position of the bottom of the first casing 1 in the left-right direction. The first suction port 11 is used as a main suction port of the whole range hood, and the second suction port 12 is used as an auxiliary suction port of the whole range hood. Preferably, in order to make the air intake area of each suction port as large as possible, the front and rear sides of each suction port extend to the corresponding front and rear sides of the bottom of the first casing 1. Here, "front" and "rear" refer to orientations relative to the user in the use state, and refer to "front" and "rear" as shown in fig. 3. In addition, in order to further enlarge the air intake area of each suction port, the left side of the first suction port 11 may be extended to the left side of the bottom of the first casing 1, and the right side of the second suction port 12 may be extended to the right side of the bottom of the first casing 1. A grill 13 is provided at the first suction port 11 to filter and rectify the oil smoke.

Referring to fig. 2 to 5 again, the power device 3 is disposed in the second housing 2, the power device 3 includes two fan systems 31 disposed in parallel left and right, each fan system 31 is disposed vertically, and an axial direction of each fan system 31 is a left-right direction. Every fan system 31 is two air intake fans to be centrifugal fan, every fan system 31 has first fan air intake 311 and second fan air intake 312 promptly, the first fan air intake 311 of two fan systems 3 is kept away from each other, the second fan air intake 312 of two fan systems 31 then is close to each other, be located left fan system 3's first fan air intake 311 towards the left side promptly, second fan air intake 312 towards the right side, be located right side fan system 3's first fan air intake 311 towards the right side, second fan air intake 312 towards the left side. The first fan air inlet 311 is a main air inlet of the fan system 3, the second fan air inlet 312 is an auxiliary air inlet of the fan system 3, the auxiliary air inlet is a side of the corresponding impeller 314 with a smaller width, and the side is further provided with a motor 315.

Each first fan air inlet 311 is located above the corresponding first suction port 11, and a space above the first suction port 11 in the first housing 1 forms a main air inlet cavity Q1. After being sucked from the first suction ports 11 at the two sides, the oil smoke enters the corresponding main air inlet cavity Q1.

Each fan system 31 includes a volute 313, an impeller 314 disposed in the volute 313, and a motor 315 for driving the impeller 314 to rotate, and the first fan inlet 311 and the second fan inlet 312 are opened at two sides of the volute 313 in the axial direction. An upwardly directed fan outlet 316 is also formed on each volute 313. In the present embodiment, the two fan systems 31 are arranged non-coaxially and form a centrosymmetric structure, where the centrosymmetric of the fan systems means that the profile of the volute 313 is centrosymmetric, and the two impellers 314 are also centrosymmetric and rotate in opposite directions. Thus, the fan outlet openings 316 formed in each volute 313 are also centrosymmetric, i.e., one of the fan outlet openings 316 is located near the front side, and the other fan outlet opening 316 is located near the rear side. The air outlet device 4 includes two air outlet housings 41, and each air outlet housing 41 is disposed at the fan outlet 316 of the volute 313. The parallel double-fan structure can avoid airflow noise caused by airflow collision on the left side and the right side of the fan system 31.

The first casing 1 includes first side plates 14 respectively disposed at the left and right sides, and the two first side plates 14 are inclined upwards from the bottom end in opposite directions until being connected to the second casing 2, so that when the oil smoke is sucked from the first suction port 11, the air flow can be guided more smoothly into the corresponding first fan air inlet 311 by the guidance of the first side plates 14.

The height of the second suction port 12 is greater than that of the first suction port 11, a second side plate 15 is formed by a part of the bottom of the first shell 1, which is located between each first suction port 11 and the second suction port 12, each second side plate 15 gradually inclines upwards from the first suction port 11 to the second suction port 12, so that a space which contracts from bottom to top is formed between the two second side plates 15, a structure which is wide at the bottom and narrow at the top is formed, the center position (the center position of the second suction port 12) of each second side plate is right above the central cooking range 100, the main function of the second side plate conforms to the fluid dynamics principle, a flow guide wall is formed, oil smoke or steam for central cooking is sucked, and meanwhile, the oil smoke at two sides escapes when a human body walks.

The space above the second suction port 12 in the first casing 1 and the second casing 2 forms an auxiliary air inlet cavity Q2, the second fan air inlets 312 of the fan system 31 are located above the auxiliary air inlet cavity Q2, and both the second fan air inlets 312 are communicated with the auxiliary air inlet cavity Q2. Steam or oil smoke enters the auxiliary air inlet cavity Q2 from the second suction port 12, and the auxiliary air inlet cavity Q2 can play a role in buffering the oil smoke because of being positioned at the lower side of the fan system 31.

The range hood adopts a suction state that the first suction port 11 faces downwards, referring to fig. 6, the second housing 2 of the range hood is at least partially installed in a hanging cabinet 200 of a kitchen, and three cooking ranges 100 are arranged below the range hood at intervals in the left-right direction. Each first suction port 11 is directly opposite to the upper side of the corresponding left or right cooking range 100, and mainly functions to provide a concentrated negative pressure region for directly sucking the oil smoke when the oil smoke rises. The installation height of the first suction port 11 is preferably 400 to 580mm (a contraction section in a smoke rising model). The second suction port 12 is directly opposite to the upper side of the middle burner 100.

In the above-mentioned staggered distribution manner of the first suction port 11 and the second suction port 12, the first suction port 11 is directly opposite to the centers of the left and right cooking ranges 100, and the amount of oil smoke in the centers of the two cooking ranges 100 is the largest, so that the oil smoke suction effect is improved by reducing the oil smoke suction position of the first suction port 11, and meanwhile, the first suction port 11 and the second suction port 12 are connected through the inclined second side plate 15, once the first suction port 11 generates oil smoke disturbance under the interference condition, the oil smoke can also enter the second suction port 12 along the second side plate 15, on the other hand, the second suction port 12 can also be used for sucking the steam of the middle cooking range 100 (when the left and right cooking ranges 100 are used for cooking with large amount of oil smoke, such as frying, and the like, the middle cooking range 100 is generally used for cooking without substantial oil smoke, such as steaming, and the like), the steam is sucked in a staggered distribution manner, and is guided into the second suction port 12, which can reduce the diffusion of the steam, protect electronic components, and on the other hand, the position of the steamer is higher, and the second suction port 12 is raised, and the applicable range is wider.

The range hood of the invention carries out the first heavy separation when the oil smoke passes through the grating 13, and carries out the second heavy centrifugal swing and suction separation through the rotation of the impeller 314 when the oil smoke passes through the fan system 31, and a miniaturized fan system can be adopted, because the area of entering the power device 3 is increased, the inflow air speed is reduced, and the oil smoke separation effect is further enhanced from multiple aspects.

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 from the first portion along a flow path or/and 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 member, such as a fluid channel, e.g., a pipe, a channel, a conduit, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow therethrough, or a combination thereof.

Claims (8)

1. The utility model provides a range hood, includes first casing (1) and sets up second casing (2) above first casing (1), fluid intercommunication between first casing (1) and the second casing (2), be provided with power device (3) in the second casing (2), power device (3) are including two fan system (31) of parallel arrangement, first sunction inlet (11) and second sunction inlet (12) have been seted up to the bottom of first casing (1), first sunction inlet (11) have two and lie in the left and right sides of second sunction inlet (12), its characterized in that: every fan system (31) is the two air inlet fans that extend about the axial, every fan system (31) has first fan air intake (311) and second fan air intake (312), first fan air intake (311) of two fan systems (31) are kept away from each other, second fan air intake (312) of two fan systems (31) are then close to each other, every first fan air intake (311) are located corresponding first inhaling mouth (11) top, two second fan air intake (312) are then located second inhaling mouth (12) top.

2. The range hood of claim 1, wherein: the first fan air inlet (311) is a main air inlet of the fan system (31), and the second fan air inlet (312) is an auxiliary air inlet of the fan system (31).

3. The range hood of claim 1 or 2, wherein: the first shell (1) comprises first side plates (14) which are arranged on the left side and the right side respectively, and the two first side plates (14) are obliquely extended upwards in opposite directions from the bottom ends until being connected with the second shell (2).

4. The range hood of claim 1 or 2, wherein: the second suction port (12) is located higher than the first suction port (11).

5. The range hood of claim 4, wherein: the bottom of the first shell (1) between each first suction port (11) and each second suction port (12) forms a second side plate (15), each second side plate (15) gradually extends upwards from the first suction port (11) to the second suction port (12) in an inclined mode, and therefore a space which is contracted from bottom to top is formed between the two second side plates (15).

6. The range hood of claim 1 or 2, wherein: the front side and the rear side of each suction inlet extend to the corresponding front side and the corresponding rear side of the bottom of the first shell (1).

7. The range hood of claim 1 or 2, wherein: a grating (13) is arranged at the first suction port (11).

8. The range hood of claim 1 or 2, wherein: the two fan systems (31) are arranged in a central symmetry manner.

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