CN215216390U

CN215216390U - Fume exhaust fan

Info

Publication number: CN215216390U
Application number: CN202121197968.XU
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: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-12-17
Anticipated expiration: 2031-05-31

Abstract

The utility model discloses a range hood, including fan frame and the fan system of setting in the fan frame, range hood is still including being hollow last box, middle box and lower box, it sets up the below at the fan frame to go up the box, go up box, middle box and lower box and from top to bottom connect gradually, the air intake has been seted up to the lower surface of box down, air intake, lower box, middle box, last box and fan frame fluid intercommunication, air intake department is provided with the baffle that can open or close the air intake. Compared with the prior art, the utility model has the advantages of: through box, middle box and lower box in fan frame below for the negative pressure zone sinks, thereby promotes the oil absorption cigarette effect, opens the air intake when culinary art for lower box lower part forms and holds together the smoke chamber, further promotes the oil absorption cigarette effect, closes the air intake after culinary art finishes, can keep apart the inside peculiar smell of range hood and prevent that the flavor gets into the kitchen environment is scurried to the cigarette of falling of public flue.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

Chinese cooking can generate a large amount of oil smoke, and in order to keep the kitchen environment clean and the human health, the range hood becomes one of indispensable kitchen household appliances in modern families. The range hood generally comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of being neat and light, small in occupied space, good in matching with a hanging cabinet, low in noise and the like.

The top-suction type range hood generally comprises a smoke collecting hood and a fan frame positioned on the smoke collecting hood, wherein a volute, an impeller and a motor for driving the impeller are installed in the fan frame, and an air inlet is arranged in the center of the smoke collecting hood and is directly connected with a high negative pressure area where the fan is located. The range hood has the problems of high wind speed and negative pressure at the air inlet of the smoke collecting hood and large negative pressure attenuation at the position far away from the air inlet. The stove burner used during cooking is usually arranged on the left side and the right side under the range hood, and the oil smoke has diffusion phenomenon in the rising process, so that the range hood has poor smoking effect and the phenomenon of oil smoke escape frequently occurs. And certain flow loss exists in the flowing process of the oil smoke gas flow in the internal flow passage of the range hood.

In addition, the common top-suction range hood is usually suspended and flush with the hanging cabinet, the fan frame can be hidden in the hanging cabinet after the door of the hanging cabinet is closed, the depth of the smoke collecting hood is usually 500 mm-550 mm, and the depth of the standard hanging cabinet is 350mm or 370 mm. Therefore, the fume collecting hood usually extends out of the hanging cabinet and is not beautiful. And the wall cupboard is usually installed higher, so the range hood is also usually installed higher, and the oil smoke exists and rises the diffusion phenomenon, and the higher the rising is, the scope of diffusion is bigger, so the range hood needs bigger collection petticoat pipe to cage the cigarette if hanging high and prevent that the oil smoke from escaping.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art exist not enough, provide a range hood, can make the negative pressure zone sink, promote the oil absorption cigarette effect, can also avoid falling the cigarette and scurrying the flavor.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes fan frame and the fan system of setting in the fan frame, its characterized in that: the range hood is characterized by further comprising an upper box body, a middle box body and a lower box body which are hollow, wherein the upper box body is arranged below the fan frame, the upper box body, the middle box body and the lower box body are sequentially connected from top to bottom, an air inlet is formed in the lower surface of the lower box body, the air inlet, the lower box body, the middle box body, the upper box body and the fan frame are communicated in a fluid mode, and a baffle capable of opening or closing the air inlet is arranged at the air inlet.

Preferably, the baffle is rotatably connected to the lower case in order to open and close the air inlet.

Preferably, in order to guide the oil fume flow when the oil fume separator is opened, the front side of the baffle is rotatably connected with the lower box body and can rotate towards the interior of the lower box body.

In order to drive the baffle to act, a movement mechanism used for driving the baffle to rotate is arranged on the inner side of the bottom of the lower box body, the movement mechanism comprises a driving mechanism and a transmission mechanism, the transmission mechanism comprises a transmission shaft and a rocker, the transmission shaft extends in the left-right direction, the transmission shaft is driven by the driving mechanism to rotate around the axis of the transmission shaft, and the rocker is fixed with the transmission shaft and one side, facing the inside of the lower box body, of the baffle respectively.

In order to be convenient for the transmission shaft to be rotatably arranged in the lower box body, the transmission mechanism further comprises two bases arranged on the inner side of the bottom of the lower box body, the two bases are respectively arranged at the two ends of the transmission shaft, and the two ends of the transmission shaft are respectively rotatably connected with the bases.

In order to enable oil smoke gas flow to enter the middle box body for transition after reaching the lower box body for diffusion, dynamic pressure reduces static pressure and enters the upper box body in an increasing mode so as to reduce flow loss, reduce noise, improve fan efficiency and improve oil smoke absorption effect, the bottom of the rear side of the upper box body is connected with the top of the middle box body, the bottom of the middle box body is connected with the top of the rear side of the lower box body, and the sizes of the upper box body and the lower box body in the front-rear direction are larger than those of the middle box body.

In order to facilitate the complete machine and the hanging cabinet to be better adapted, the front side of the fan frame is positioned behind the front side of the upper box body.

Preferably, the distance between the front side of the fan frame and the front side of the upper box body is A, and the value range of A is 15-30 mm.

In order to put articles conveniently, the top of the lower box body is provided with an article-putting cover plate.

Compared with the prior art, the utility model has the advantages of: the negative pressure region sinks through the upper box body, the middle box body and the lower box body below the fan frame, so that the oil fume suction effect is improved, the air inlet is opened during cooking, the lower part of the lower box body forms a fume collecting cavity, the oil fume suction effect is further improved, the air inlet is closed after cooking is finished, the peculiar smell in the range hood can be isolated, and the smell of the reverse fume of a public flue is prevented from entering a kitchen environment; the baffle rotates towards the interior of the lower box body, so that the flow guiding effect can be achieved, and the oil smoke moves towards the rear side of the range hood along the baffle; through making the front side of fan frame be located behind last box front side to make the complete machine can with the better collocation of kitchen wall cabinet, the overall uniformity is good.

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 an open state of the range hood according to the embodiment of the present invention (viewed from bottom to top, different from the view shown in fig. 1);

fig. 3 is a sectional view of the opened state of the range hood according to the embodiment of the present invention;

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

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

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

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 a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions 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 to 3, a range hood includes an upper box 1, a middle box 2, a lower box 3 and a fan frame 4, wherein the upper box 1 is disposed under the fan frame 4, and the left and right length of the upper box is greater than that of the fan frame 4. The upper box body 1, the middle box body 2 and the lower box body 3 are all hollow box bodies. The bottom of the rear side of the upper box body 1 is connected with the top of the middle box body 2, the bottom of the middle box body 2 is connected with the top of the rear side of the lower box body 3, the upper box body 1 and the middle box body 2 and the lower box body 3 are mutually communicated in a fluid mode, and the upper box body 1 is communicated with the air frame 4 in a fluid mode. The sizes of the upper box body 1 and the lower box body 3 in the front and back direction are larger than that of the middle box body 2, the middle box body 2 is a box body with a thin structure in the front and back direction, namely, the sectional area is reduced when the lower box body 3 is transited to the middle box body 2, and the sectional area is increased when the middle box body 2 is transited to the upper box body 1. A fan system 8 is arranged in the fan frame 4.

The front side of fan frame 4 is located the rear of the front side of last box 1, and the distance between the front side of fan frame 4 and the front side of last box 1 is A, and is preferred, and the value range of A is 15 ~ 30 mm. After the range hood is installed, the fan frame 4 is hidden on the back of the hanging cabinet, the front part of the upper box body 1 is flush with a door plate of the hanging cabinet, and the top of the upper box body 1 can be used as a bottom plate of the hanging cabinet, so that the range hood is matched with the hanging cabinet with good appearance consistency.

An air inlet 51 is formed in the lower surface of the lower box 3, a baffle plate 52 is arranged at the air inlet 51, and the top plate 52 is rotatably connected with the lower box 3, so that the air inlet 51 can be opened or closed. In the present embodiment, the front side of the shutter 52 is rotatably connected to the lower case 3. Referring to fig. 2 to 4, a moving mechanism for driving the baffle 52 to rotate is disposed at the inner side of the bottom of the lower box 3, the moving mechanism includes a driving mechanism 53 and a transmission mechanism, the driving mechanism 53 is a motor in this embodiment, and the transmission mechanism includes a transmission shaft 54 and a rocker 55. The transmission mechanism further includes two bases 56 disposed at the inner side of the bottom of the lower case 3, the two bases 56 are respectively disposed at two ends of the transmission shaft 54, the transmission shaft 54 extends in the left-right direction and is disposed at the front side of the baffle plate 52, two ends of the transmission shaft 54 are respectively rotatably connected with the bases 56, the transmission shaft 54 is driven by the driving mechanism 53 to rotate around its axis, in this embodiment, the output end of the motor can be directly or indirectly connected with the end of the transmission shaft 54. The rocking bars 55 may have two numbers, which are spaced apart in the left-right direction, and the rocking bars 55 are fixed to the transmission shaft 54 and the baffle plate 52, respectively, at a side facing the inside of the lower case 3.

The top of the lower box body 3 is provided with a storage cover plate 6 which can be used as a storage table top.

When the range hood is not in operation, the baffle 52 is flush with the lower surface of the lower box 3, and the air inlet 51 is closed, as shown in fig. 5 and 6. When the range hood works, the moving mechanism drives the baffle plate 52 to turn towards the inside of the lower box body 3, so that the air inlet 51 is opened, a smoke collecting cavity is formed inside the lower box body 3 at the moment, and the opened baffle plate 52 has a flow guiding effect, so that the oil smoke flows towards the rear side along the baffle plate 52. After cooking is finished, the air inlet 51 is closed again by the baffle 52, and at the moment, peculiar smell in the range hood can be isolated, and the smell of the reverse smoke of the public flue can be prevented from entering the kitchen environment.

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), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims

1. The utility model provides a range hood, includes fan frame (4) and sets up fan system (8) in fan frame (4), its characterized in that: the range hood is characterized by further comprising an upper box body (1), a middle box body (2) and a lower box body (3) which are hollow, the upper box body (1) is arranged below the fan frame (4), the upper box body (1), the middle box body (2) and the lower box body (3) are sequentially connected from top to bottom, an air inlet (51) is formed in the lower surface of the lower box body (3), the air inlet (51), the lower box body (3), the middle box body (2), the upper box body (1) and the fan frame (4) are in fluid communication, and a baffle (52) capable of opening or closing the air inlet (51) is arranged at the air inlet (51).

2. The range hood of claim 1, wherein: the baffle (52) is rotatably connected with the lower box body (3).

3. The range hood of claim 2, wherein: the front side of the baffle (52) is rotatably connected with the lower box body (3) and can rotate towards the interior of the lower box body (3).

4. A range hood according to claim 2 or 3, wherein: the inner side of the bottom of the lower box body (3) is provided with a movement mechanism for driving the baffle (52) to rotate, the movement mechanism comprises a driving mechanism (53) and a transmission mechanism, the transmission mechanism comprises a transmission shaft (54) and a rocker (55), the transmission shaft (54) extends in the left-right direction, the transmission shaft (54) is driven by the driving mechanism (53) and can rotate around the axis of the transmission shaft, and the rocker (55) is fixed with one side of the transmission shaft (54) and the baffle (52) facing the inside of the lower box body (3) respectively.

5. The range hood of claim 4, wherein: the transmission mechanism further comprises bases (56) arranged on the inner side of the bottom of the lower box body (3), the two bases (56) are arranged at two ends of the transmission shaft (54) respectively, and two ends of the transmission shaft (54) are rotatably connected with the bases (56) respectively.

6. The range hood according to any one of claims 1 to 3, wherein: the rear side bottom of the upper box body (1) is connected with the top of the middle box body (2), the bottom of the middle box body (2) is connected with the rear side top of the lower box body (3), and the sizes of the upper box body (1) and the lower box body (3) in the front-back direction are larger than that of the middle box body (2).

7. The range hood according to any one of claims 1 to 3, wherein: the front side of the fan frame (4) is positioned behind the front side of the upper box body (1).

8. The range hood of claim 7, wherein: the distance between the front side of the fan frame (4) and the front side of the upper box body (1) is A, and the value range of A is 15-30 mm.

9. The range hood according to any one of claims 1 to 3, wherein: the top of the lower box body (3) is provided with an object placing cover plate (6).