CN217274383U

CN217274383U - Fume exhaust fan

Info

Publication number: CN217274383U
Application number: CN202220768683.5U
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: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-08-23
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a range hood, include the box structure and be used for setting up the fan frame of fan system, the box structure sets up the below in the fan frame, the air intake, its characterized in that have been seted up to the bottom of box structure: the range hood further comprises a filter screen arranged on the oil smoke flow path and a cleaning device used for cleaning the filter screen, wherein the cleaning device comprises a nozzle capable of spraying a cleaning medium like the windward side of the filter screen. Compared with the prior art, the utility model has the advantages of: through setting up the nozzle that can spray cleaning medium to the windward side of filter screen, can wash the windward side of filter screen, improve the cleaning performance, prolong the life of filter screen.

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. And this type of range hood can set up the filter screen in air intake department, and the oil smoke can filter the large granule (generally be greater than PM10) greasy dirt when passing through the filter screen, and inside reentrant range hood, then further filter remaining tiny particle greasy dirt through fan centrifugal force. If not set up the filter screen, then can lead to a large amount of large granule oil smoke entering fan system, if the impeller of fan adheres to a large amount of oil smoke particles, then can destroy impeller dynamic balance, make the range hood shake aggravation, the noise rises.

The existing filter screens generally do not have self-cleaning capability, and can block an oil screen after long-term use, so that the air inlet resistance is increased, the smoking effect is reduced, and the filter screens usually need to be detached regularly for cleaning. Some filter screen self-cleaning devices are available at present, but generally only the leeward side of the filter screen can be cleaned, but the windward side with heavy oil stains cannot be sufficiently cleaned.

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 improve filter screen cleaning performance, promote the oil absorption cigarette effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes box structure and the fan frame that is used for setting up fan system, the box structure sets up the below at the fan frame, air intake, its characterized in that have been seted up to the bottom of box structure:

the range hood further comprises a filter screen arranged on the oil smoke flow path and a cleaning device used for cleaning the filter screen, wherein the cleaning device comprises a nozzle capable of spraying a cleaning medium like the windward side of the filter screen.

Preferably, the left end connection of filter screen is in the left side of box structure, the right-hand member connection of filter screen is on the right side of box structure, the oil smoke passes through the filter screen from bottom to top, the nozzle sets up the below at the filter screen.

For increasing the filtering area, the filter screen is in an upward arched arc shape.

In order to change the angle of the cleaning medium impacting the same position of the filter screen and improve the cleaning effect, the filter screen is made of elastic materials, and the left end part and the right end part of the filter screen are movably connected with the box body structure, so that the left end part and the right end part of the filter screen can move close to each other or move away from each other.

In order to facilitate the supply of the cleaning medium to the nozzle, the cleaning device further comprises a tank for storing the cleaning medium and a water pump for pumping the cleaning medium in the tank to the nozzle.

Preferably, in order to enable the nozzle to have a multi-surface spraying direction, the nozzle comprises a nozzle body and a spray head, wherein the spray head is provided with a spray hole, and the surface of the spray head is a spherical crown surface.

More preferably, the spray head is rotatably connected to the nozzle body to be rotatable relative to the nozzle body for dynamic flushing, improved cleaning and cleaning coverage.

In order to facilitate the arrangement of the filter screen and simultaneously avoid the situation that the cleaned waste liquid directly flows downwards through the air inlet, the range hood further comprises a lower box body and an intermediate box body positioned above the lower box body, the bottom of the intermediate box body is connected with the lower box body, the intermediate box body and the lower box body are mutually communicated in a fluid mode, the size of the lower box body in the front-back direction is larger than that of the intermediate box body, the air inlet is formed in the bottom of the lower box body, and the filter screen is arranged in the intermediate box body.

Compared with the prior art, the utility model has the advantages of: the nozzle capable of spraying the cleaning medium to the windward side of the filter screen is arranged, so that the windward side of the filter screen can be cleaned, the cleaning effect is improved, and the service life of the filter screen is prolonged; through making the filter screen can be elastic deformation's structure, can make the angle that cleaning medium assaulted the filter screen same position change to further improve the cleaning performance.

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 (a part of the box structure is cut away when looking from back to front);

fig. 3 is a rear view of the hidden box structure and the air frame of the range hood according to the embodiment of the present invention (the filter screen is stretched);

fig. 4 is a rear view (the filter screen is compressed) of the hidden box structure and the air frame 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," "transverse," "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 illustrated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are intended to facilitate the description of the invention and to simplify the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention can be positioned in different orientations, these directional terms are intended to be illustrative and not to 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 and 2, a range hood comprises a box structure composed of an upper box 1, a middle box 2 and a lower box 3, and a fan frame 4, wherein the upper box 1 is arranged right below the fan frame 4, and the length of the upper box in the left-right direction 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 rear side of the lower box body 3, the upper box body 1 and the middle box body 2 are in fluid communication with each other, the middle box body 2 and the lower box body 3 are in fluid communication with each other, and the upper box body 1 is in fluid communication with the air frame 4. 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 (not shown) is provided in the fan frame 4.

The front side of the fan frame 4 is positioned behind the front side of the upper box body 1. 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 the 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 matching with the whole appearance of the hanging cabinet with better consistency is formed.

In the present embodiment, the upper case 1 and the intermediate case 2 are integrally formed. The upper box body 1 or the middle box body 2 or the upper box body 1 and the middle box body 2 are not arranged, and the fan frame 4 is directly connected with the lower box body 3.

The bottom of the lower box body 3 is provided with an air inlet 5. The lower case 3 includes a top wall 31 and a bottom wall 32 spaced up and down, a front side wall 33 and a rear side wall (not shown) spaced front and rear, and a left side wall 35 and a right side wall 36 spaced left and right. Wherein, the rear end of the top wall 31 extends to the bottom front side of the middle box body 2, the front side wall 33 is connected between the front end parts of the top wall 31 and the bottom wall 32, the rear side wall is connected between the rear side of the middle box body 2 and the rear end part of the bottom wall 32, the left side wall 35 is connected between the left end parts of the top wall 31, the bottom wall 32, the front side wall 33 and the rear side wall, and the right side wall 36 is connected between the right end parts of the top wall 31, the bottom wall 32, the front side wall 33 and the rear side wall. Preferably, the top wall 31 and the bottom wall 32 are horizontal, and the front side wall 33, the rear side wall, the left side wall 35 and the right side wall 36 are vertical, so that the lower box 3 is a rectangular parallelepiped. The air inlet 5 is formed in the bottom wall 32. The top wall 31 can be used for placing objects.

The range hood also comprises a filter screen 6 which is arranged on the oil smoke flow path, and the filter screen 6 is preferably in an upward arched arc shape. In the present embodiment, the screen 6 may extend upward from the middle casing 2 into the upper casing 1, may extend upward from the lower casing 3 into the middle casing 2 or the upper casing 1, or may be located only in the middle casing 2 as long as it does not interfere with other components. In the present embodiment, it is disposed in the intermediate box 2. Therefore, the oil smoke entering from the air inlet 5 upwards passes through the filter screen 6, and can generate larger-area contact relative to a flat-plate-shaped filter screen, and a better filtering effect can be obtained.

The left end part of the filter screen 6 is connected to the left side in the box body structure in a flat plate shape, and the right end part of the filter screen 6 is connected to the right side in the box body structure in a flat plate shape. The front end and the rear end of the filter screen 6 are respectively attached to corresponding positions of the box body structure, so that the oil smoke is prevented from flowing upwards to the fan system without being filtered.

The range hood further comprises a cleaning device for cleaning the filter screen 6, wherein the cleaning device comprises a liquid storage tank 101, a water pump 102 and a nozzle 103, the liquid storage tank 101 is arranged on the outer side of the box body structure, such as the top wall 31 of the lower box body 3 shown in fig. 1, and cleaning media, such as water, cleaning agents and the like, are stored in the liquid storage tank 101. The tank 101 may be connected to an external source of cleaning medium, such as a water tap or the like, by a conduit or the like. The cleaning medium may be stored in the reservoir 101 in advance or may be refilled when cleaning is required.

The water pump 102 is in fluid communication with the reservoir 101 through a water pipe 104, the nozzle 103 is arranged inside the tank structure and below the sieve 6, and the water pump 102 is in fluid communication with the nozzle 103. The nozzle 103 includes a nozzle body 1031 for connecting the water pump 102 and a spray head 1032 positioned at one end of the nozzle body 1031 far away from the water pump 102, and the spray head 1032 is provided with a spray hole 1033. Therefore, the water pump 102 can pump the cleaning medium in the liquid storage tank 101 into the nozzle 103, and the nozzle 103 can spray the cleaning medium onto the windward side (the side facing the oil smoke, namely the lower surface shown in fig. 2) of the filter screen 6 to clean the filter screen 6, so that the cleaning effect is improved, the oil smoke absorption effect is improved, and the service life is prolonged.

The surface of the spray head 1032 may be spherical crown surface, the spray holes 1033 may have at least two spaced-apart spray holes, and the spray head 1032 may rotate (rotate in a universal manner or around an axis) relative to the nozzle body 1031, so that the cleaning medium sprayed from the spray holes 1033 may cover the entire windward side of the screen 6 along with the rotation. As shown in fig. 2, the spray head 1032 rotates around the rotation axis in the front-rear direction, and sprays the spray on the windward side of the filter screen 6 in a circular motion, thereby cleaning the filter screen 6. Alternatively, the spray head 1032 may be rotated about an axis in the up-down direction, in which case the surface of the spray head projects upward.

The filter screen 6 is preferably made of an elastic material, and the left and right ends of the filter screen are movably connected with the box structure. The accessible sets up motion and makes the outside extension in both ends of filter screen 6, the direction is the direction of motion as shown by the arrow in fig. 3, the dotted line is shown to be the spray direction of cleaning medium, perhaps makes the both ends of filter screen 6 to shrink inwards, the direction is the direction of motion as shown by the arrow in fig. 4, the dotted line is shown to be the spray direction of cleaning medium, thereby the radian of filter screen 6 changes, the impact angle that cleaning medium that nozzle 103 jetted sprays on filter screen 6 changes, promote the cleaning performance. The motion mechanism is not shown in the figure and can be a conventional linear driving module, such as an electric push rod, a motor screw nut and the like.

A drain 321 may be provided in the bottom wall 32, and an oil cup (not shown) may be provided at a position corresponding to the lower tank 3, so that the cleaned waste liquid flowing down from the filter screen 6 enters the oil cup through the drain 321.

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 box structure and fan frame (4) that are used for setting up fan system, the box structure sets up in the below of fan frame (4), air intake (5), its characterized in that have been seted up to the bottom of box structure:

the range hood also comprises a filter screen (6) arranged on the oil smoke flow path and a cleaning device used for cleaning the filter screen (6), wherein the cleaning device comprises a nozzle (103) which can spray cleaning media like the windward side of the filter screen (6).

2. The range hood of claim 1, wherein: the left end connection of filter screen (6) is in the left side of box structure, the right-hand member connection of filter screen (6) is on the right side of box structure, the oil smoke passes through filter screen (6) from bottom to top, nozzle (103) set up the below at filter screen (6).

3. The range hood of claim 2, wherein: the filter screen (6) is in an arc shape which is arched upwards.

4. The range hood of claim 3, wherein: the filter screen (6) is made of elastic materials, and the left end and the right end of the filter screen (6) are movably connected with the box body structure, so that the left end and the right end of the filter screen (6) can move close to each other or move away from each other.

5. The range hood of claim 1, wherein: the cleaning device also comprises a liquid storage tank (101) used for storing the cleaning medium and a water pump (102) used for pumping the cleaning medium in the liquid storage tank (101) to the nozzle (103).

6. The range hood of claim 1, wherein: the nozzle (103) comprises a nozzle body (1031) and a spray head (1032), wherein the spray head (1032) is provided with a spray hole (1033), and the surface of the spray head (1032) is a spherical crown surface.

7. The range hood of claim 6, wherein: the spray head (1032) is rotatably connected to the nozzle body (1031) so as to be rotatable relative to the nozzle body (1031).

8. The range hood according to any one of claims 1 to 7, wherein: the range hood further comprises a lower box body (3) and an intermediate box body (2) located above the lower box body (3), the bottom of the intermediate box body (2) is connected with the lower box body (3), the intermediate box body (2) is communicated with the lower box body (3) through fluid, the size of the lower box body (3) in the front-rear direction is larger than that of the intermediate box body (2), the bottom of the lower box body (3) is formed in an air inlet (5), and the filter screen (6) is arranged in the intermediate box body (2).