CN114576665B

CN114576665B - Fume exhaust fan

Info

Publication number: CN114576665B
Application number: CN202210150242.3A
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: 2022-02-18
Filing date: 2022-02-18
Publication date: 2023-04-14
Anticipated expiration: 2042-02-18
Also published as: CN114576665A

Abstract

The invention discloses a range hood, which comprises a box body structure, a filtering device and a cleaning device for cleaning the filtering device, wherein the bottom of the box body structure is provided with a first air inlet, an oil smoke channel for oil smoke to pass through is formed inside the box body structure, the cleaning device comprises a cleaning box arranged outside the box body structure, a cleaning chamber is formed in the cleaning box, and when the range hood is in a working state, the filtering device is positioned in the oil smoke channel, and the cleaning chamber is closed and isolated from the oil smoke channel; when the range hood is in a self-cleaning state, the filtering device moves into the cleaning chamber and can be cleaned by a cleaning medium. Compared with the prior art, the invention has the advantages that: when the range hood normally works, the cleaning chamber is completely isolated from the oil smoke channel to avoid being blocked or damaged by oil stains, and when the range hood is in a self-cleaning state, the filtering device can enter the cleaning chamber to be conveniently cleaned in a soaking and/or flushing mode.

Description

Cooking fume exhauster

Technical Field

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

Background

Chinese cooking generates a large amount of oil smoke, and in order to keep the kitchen environment clean and human health, the range hood has become one of the 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, the center of the smoke collecting hood is provided with an air inlet which is directly connected with a high negative pressure area where the fan is positioned, and the range hood of the type can be provided with a filter screen at the air inlet, so that the oil smoke can be partially filtered when passing through the filter screen and then enters the range hood, and is further filtered by the centrifugal force of the fan.

When the oil smoke passes through the filter screen, large-particle oil stains (generally larger than PM 10) can be filtered, then the oil stains enter the range hood, and then the remaining small-particle oil stains are further filtered through the centrifugal force of the fan. If not set up the filter screen, then can lead to a large amount of large granule oil smoke to get into fan system, if a large amount of oil smoke granules are attached to the impeller, then can destroy impeller dynamic balance, make the lampblack absorber shake aggravation, the noise rises. The existing filter screens usually do not have self-cleaning capability, and can block an oil screen after long-term use, so that the air inlet resistance is increased, and further the smoking effect is reduced, so that the filter screens usually need to be detached regularly for cleaning, and great inconvenience is brought to users.

Therefore, a self-cleaning range hood is also provided at present, and steam washing is applied to the existing self-cleaning range hood product as a novel cleaning technology. It is often set up in the fan system of lampblack absorber, has a spray tube usually, and steam gets into in the spray tube, then from the trompil blowout of spray tube to realize wasing fan, filter screen etc. to the lampblack absorber. However, in the prior art, the nozzle is usually provided with a plurality of openings, and the diameter of the openings gradually decreases after the openings are exposed to the oil pollution environment for a long time, and the openings are finally completely blocked by the oil pollution. Moreover, the steam of such cleaning devices cannot be recycled, resulting in the consumption of a large amount of water for each cleaning.

In addition, because the filter screen sets up usually in the smoke collecting cavity, the oil smoke at first can carry out the contact with the lower surface of filter screen and filter, and under general condition, the greasy dirt of filter screen lower surface usually can be more. However, the self-cleaning device of the existing range hood usually only cleans the inner surface (upper surface) of the filter screen, and the lower surface of the filter screen can only be scrubbed by a user and cannot be self-cleaned.

Disclosure of Invention

The invention aims to solve the technical problem that in order to overcome the defects in the prior art, the invention provides the range hood, and the cleaning device can be isolated from an oil smoke channel in a cooking state, so that the range hood is prevented from being blocked or damaged by oil stains.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes box structure, filter equipment and is used for carrying out abluent belt cleaning device to filter equipment, first air intake has been seted up to the bottom of box structure, the inside of box structure is formed with the oil smoke passageway that the oil supply cigarette passes through, belt cleaning device is including setting up the washing case in the box structure outside, wash the space formation purge chamber in the case, its characterized in that: when the range hood is in a working state, the filtering device is positioned in the oil smoke channel, and the cleaning chamber is closed and isolated from the oil smoke channel; when the range hood is in a self-cleaning state, the filtering device moves into the cleaning chamber and can be cleaned by using a cleaning medium.

Preferably, in order to facilitate recycling of the cleaning medium and fully clean the filtering surface of the filtering device facing the oil smoke, a fluid circulation channel for flowing of the cleaning medium is formed in the cleaning chamber, and a power device is further arranged in the cleaning chamber and provides power for flowing of the cleaning medium, so that the cleaning medium flows in a circulating manner along the surface of the filtering device facing the oil smoke, the surface of the filtering device facing away from the oil smoke, and the surfaces of the power device and the filtering device facing the oil smoke in sequence.

Preferably, in order to facilitate the recycling of the cleaning medium, a fluid circulation channel for the flow of the cleaning medium is formed in the cleaning chamber, and a power device for providing power for the flow of the cleaning medium is further arranged in the cleaning chamber.

Preferably, the power device is a fan, the cleaning device further comprises an atomization box arranged in the cleaning box, a steam generator used for converting a liquid cleaning medium into a steam form is arranged in the atomization box, and the cleaning device further comprises a nozzle used for spraying the cleaning medium into the fluid circulation channel.

In order to provide enough cleaning media and improve the cleaning effect conveniently, a liquid storage chamber for storing the cleaning media is formed in the atomizing box, a liquid inlet communicated with the liquid storage chamber is formed in the cleaning box, and the liquid inlet is used for being communicated with an external cleaning media source in a fluid mode.

Preferably, in order to improve the cleaning efficiency, the cleaning device further comprises a heater for heating the cleaning medium, and the heater is positioned in the fluid circulation channel.

In order to drive the filtering device and protect the moving mechanism at the same time, the cleaning device further comprises a moving mechanism for driving the filtering device to move, the moving mechanism comprises a driving mechanism which is fixedly arranged in the cleaning box and provides driving force, and a driving box is arranged outside the driving mechanism.

In order to fully clean the filter surface of the filter device facing towards the oil smoke, the cleaning box comprises a first side and a second side which are opposite, the filter device enters the cleaning chamber from a third side formed between the first side and the second side, a partition plate is arranged adjacent to the end part of the atomizing box facing towards the third side, the power device is provided with a second air inlet and an air outlet, the second air inlet is far away from the filter device, the space between the driving box and the second side of the cleaning box forms a first channel, the air outlet is close to or positioned in the first channel and faces towards the filter device, the space between the partition plate and the second air inlet forms a second channel, when the range hood is in a self-cleaning state, one sides of the atomizing box, the partition plate and the driving box facing towards the third side of the cleaning box are respectively abutted against the filter device, the space between the filter device and the first side of the cleaning box forms a third channel, the space between the filter device and the second side of the cleaning box forms a fourth channel, the surfaces facing towards the oil smoke are respectively, and the first channel, the fourth channel, the second channel and the second channel are communicated with the second channel through a gap of the second channel.

In order to clean the filter surface of the filter device facing the cooking fumes, the clean cleaning medium first cleans the filter surface of the filter device, and the nozzles are arranged in the first channel and the fourth channel.

Preferably, in order to ensure that the channels are not unnecessarily communicated, the driving box and the atomizing box are tightly attached to the first side of the cleaning box, the partition plate is tightly attached to the second side of the cleaning box, when the range hood is in a self-cleaning state, the end part, facing the first side of the cleaning box, of the partition plate is flush with the filtering device, and the end part, facing the second side of the cleaning box, of the driving box is flush with the filtering device.

Preferably, the cleaning box is arranged on the front side of the box body structure, the filtering device is switched between the oil smoke channel and the cleaning chamber through front and back translation, the first side is the top of the cleaning box, the second side is the bottom of the cleaning box, the third side is the rear side of the cleaning box, and the partition plate extends in the left and right directions.

In order to drive the filtering device conveniently, the cleaning device further comprises a moving mechanism for driving the filtering device to move, and the moving mechanism is a linear driving module, so that the filtering device can be switched between the oil smoke channel and the cleaning chamber in a translation mode.

Preferably, the movement mechanism comprises a driving mechanism, a screw rod and a nut, the driving mechanism is fixedly arranged in the cleaning box, the driving mechanism is in transmission connection with the screw rod and can drive the screw rod to rotate around the axis of the screw rod, the nut is sleeved on the screw rod and is in threaded connection with the screw rod, and the nut is fixed with the filtering device.

In order to facilitate the arrangement of the cleaning device, the occupation of extra space is avoided simultaneously, and the first air inlet is enabled to be located at a lower position, the box structure comprises a middle box body and a lower box body, the bottom of the middle box body is connected with the lower box body, the middle box body is communicated with the lower box body through fluid, the size of the lower box body in the front-back direction is larger than that of the middle box body, the first air inlet is arranged at the bottom of the lower box body, the cleaning box is located at the front side of the middle box body and located above the lower box body, and when the range hood is in a working state, the filtering device is located in an oil smoke channel in the middle box body.

In order to facilitate the filter device to pass through, the cleaning chamber is closed in normal work, the cleaning box is tightly attached to the outer side of the box body structure, and when the range hood is in a working state, the cleaning chamber is closed through the end part of the filter device.

Preferably, in order to facilitate heat dissipation of hot air in the cleaning chamber through the oil fume channel after cleaning, the components of the cleaning device are prevented from being damaged due to high temperature for a long time, and the filtering device is a filtering net made of a heat conduction material.

Compared with the prior art, the invention has the advantages that: the cleaning chamber capable of cleaning the filtering device is arranged outside the box body, and the filtering device can switch positions between the cleaning chamber and the oil smoke channel, so that the cleaning chamber is completely isolated from the oil smoke channel when the range hood normally works, and is prevented from being blocked or damaged by oil stains; through setting up fluid circulation channel, can carry out heat recovery to the surface of filter equipment, especially the filtering surface of the heavy greasy dirt that faces towards the oil smoke clean, to the gas or the steam of not complete cooling (wash once, what get into circulation channel again, still remain certain heat energy) simultaneously and recycle, play energy-conserving effect.

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

fig. 3 is a partial sectional view (longitudinal section) of the range hood according to the embodiment of the present invention in an operating state;

fig. 4 is a side view, partly in section, of the range hood according to the embodiment of the present invention in the operating state (longitudinal section, parallel to the section of fig. 3);

fig. 5 is a sectional view (transverse section) of the range hood according to the embodiment of the present invention in an operating state;

fig. 6 is a cross-sectional view of the range hood according to the embodiment of the present invention in the operating state (the transverse cross-section is parallel to the cross-section of fig. 5, and the cross-section is closer to the bottom of the whole range hood);

fig. 7 is a partial cross-sectional view (longitudinal section) of a range hood of the present invention in an intermediate state into a self-cleaning state;

FIG. 8 is a partial cross-sectional view (transverse cross-section) of a range hood of the present invention in an intermediate state after entering a self-cleaning state;

fig. 9 is a partial sectional view (longitudinal section) of the range hood of the present invention in a self-cleaning state;

fig. 10 is a cross-sectional view (transverse cross-section) of the range hood of the present invention in a self-cleaning state;

fig. 11 is a sectional view (longitudinal and transverse sections) of the range hood of the present invention in a self-cleaning 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 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 6, a range hood includes 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 disposed under 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 is in fluid communication with the middle box body 2 and the middle box body 2 are in fluid communication with the lower box body 3, 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.

Lower box 3 is hollow cuboid, including roof 31 and the diapire 32 of upper and lower interval arrangement, middle box 2 also is hollow cuboid, preceding lateral wall 21 and back lateral wall 22 including interval arrangement around the back, wherein the rear end of roof 31 of lower box 3 extends to the preceding lateral wall 21 bottom of middle box 2, the rear end of the diapire 32 of lower box 3 can flush with the back lateral wall 22 of middle box 2, it is preferred, the lower tip of back lateral wall 22 extends to the rear end of diapire 32, lower box 3 and the rear side integrated into one piece of middle box 2. The top wall 31 of the lower box 3 can be used for placing articles. The bottom wall 32 of the lower box 3 is provided with a first air inlet 5, preferably, the first air inlet 5 is in a strip shape and extends along the left-right direction. The lower case 3 has a smoke collecting chamber 37 formed therein.

The range hood also comprises a filter screen 6 which can be positioned in the oil smoke channel inside the box body structure and a cleaning device for automatically cleaning the filter screen 6. The "oil smoke passage" refers to a position where oil smoke passes through the box structure after entering from the first air inlet 5, such as a smoke collecting cavity 37 in the lower box 3, a space in the middle box 2 and the upper box 1, and the like. In this embodiment, the filter screen 6 is disposed in the middle box 2 and extends transversely, and the left and right directions and the front and rear directions of the filter screen 6 are equal to those of the middle box 2, so that the filter screen 6 extends between the front side wall 21 and the rear side wall 22 of the middle box 2 in the operating state of the range hood to cover the oil smoke channel formed in the middle box 2, and the oil smoke passing through the middle box 2 and going upwards can be filtered by the filter screen 6. The cleaning device comprises a cleaning tank 81 arranged outside the tank structure and attached to the tank structure, in this embodiment the cleaning tank 81 is arranged on top of the lower tank 3 and attached to the front side of the middle tank 2. The cleaning tank 81 is hollow to form a cleaning chamber Q1.

The screen 6 can enter the cleaning chamber Q1 through the front wall 21 of the intermediate case 2, and through holes can be opened in the front wall 21 of the intermediate case 2 and the rear side of the cleaning tank 81 to allow the screen 6 to enter and exit. In order to drive the filter screen 6 to move back and forth in a translational manner, the cleaning device further includes a moving mechanism 82, which is a linear driving module, disposed in the cleaning box 81, in this embodiment, the moving mechanism 82 includes a driving mechanism 821, a lead screw 822 and a nut 823, the driving mechanism 821 is fixedly disposed in the cleaning box 81 to provide a driving force, preferably a motor, the lead screw 822 extends in a back and forth direction, and the driving mechanism 821 is in transmission connection with the lead screw 822 to drive the lead screw 822 to rotate around its axis. The screw 822 and the nut 823 form a transmission mechanism, and the nut 823 as an output end of the movement mechanism 82 is sleeved on the screw 822 and is in threaded connection with the screw 822, so that when the screw 822 rotates, the nut 823 can move back and forth along the screw 822. The front end of the strainer 6 is fixedly connected to the nut 823, so that the strainer 6 can move forward and backward along with the nut 823. Alternatively, the motion mechanism 82 may also be implemented by other existing linear driving modules, such as a combination of a motor, a gear and a rack, a combination of a motor, a worm gear and a worm, an electric push rod, and the like. In order to limit the moving track of the filter screen 6, guide rails 61 are respectively arranged at the left side and the right side in the middle box body 2, and the left end and the right end of the filter screen 6 are respectively in sliding fit with the guide rails 61 at corresponding positions.

In order to prevent the driving mechanism 821 from being damaged when the filter screen 6 enters the cleaning tank 81 for cleaning, the driving tank 824 is separated from the cleaning tank 81, the driving mechanism 821 is fixed in the driving tank 824, and the screw rod 822 extends backward from the driving tank 824. The lower surface of the drive housing 824 is preferably level with the lower surface of the sieve 6.

The cleaning device further comprises an atomization box 83 arranged in the cleaning box 81, and the atomization box 83 is a hollow box body. In the present embodiment, the atomization boxes 83 have two arranged at a left-right interval, and are arranged symmetrically. The above-mentioned driving tank 824 is connected between the two atomizing tanks 83, and the bottom of the atomizing tank 83 and the bottom of the washing tank 81 can be shared.

The two atomizing chambers 83 are provided with partitions 84 at positions adjacent to the end portions of the rear sides thereof which are away from each other, the two partitions 84 extend in directions away from each other, the partition 84 on the left side extends to the left side of the cleaning chamber 81, and the partition 84 on the right side extends to the right side of the cleaning chamber 81. The top of the driving box 824 may be flush with the top of the atomization box 83 and both may be close to the top of the cleaning box 81 (there may also be a gap), or the driving box 824 and the cleaning box 81 share a top and the atomization box 83 and the cleaning box 81 share a top. The bottom of the driving tank 824 is located above the bottom of the washing tank 81, the partition 84 is attached to the bottom of the washing tank 81, and may extend upward from the bottom of the washing tank 81 as preferred, and the top of the partition 84 is lower than the top of the washing tank 81. When the screen 6 enters the cleaning chamber Q1 for cleaning, it abuts against the atomizing chamber 83, the driving chamber 824 and the rear side of the partition 84, and in this embodiment, it is preferable that the top of the partition 84 is flush with the screen 6 and the bottom of the driving chamber 824 is flush with the screen 6, as long as the top of the partition 84 is not lower than the screen 6 and the bottom of the driving chamber 824 is not higher than the screen 6. When the screen 6 moves into the washing tank 81, it engages with the bottom of the rear side of the driving tank 824 while engaging with the top of the partition 84, and at this time, the screen 6 is located in the space between the rear side of the atomization tank 83 and the rear side of the washing tank 81. The top of the cleaning tank 81 is the first side thereof, the bottom of the cleaning tank 81 is the second side thereof, and the rear side of the cleaning tank 81 through which the filter screen 6 passes is the third side thereof.

The inside of the atomization box 83 is divided into two separated layers, the upper layer of which forms a liquid storage chamber Q2 for storing cleaning media such as water and cleaning agents. The lower layer constitutes a steam chamber Q3 in which a steam generator 85, a water pump 86 and a guide pipe 87 are provided. The water pump 86 is used for pumping the cleaning medium in the reservoir Q2 into the steam generator 85, and the conduit 87 is communicated with the outlet of the steam generator 85. An inlet 811 may be provided at the top of the cleaning tank 81 in fluid communication with the reservoir Q2. The inlet port 811 is in fluid communication with an external source of cleaning medium, such as may be connected to a water tap or the like. And the inlet of the water pump 86 is in fluid communication with the reservoir Q2.

The cleaning device further comprises a power unit 88 arranged between the two atomization boxes 83, the power unit 88 having a second air inlet 883 and an air outlet 881 both located inside the cleaning box 81, the power unit 88 is preferably a fan, more preferably a cross-flow fan, since the cleaning medium cleans the filter screen 6 in the form of steam in this embodiment. The second air inlet 883 of the power device 88 faces the side away from the filter screen 6 (forward), and the air outlet 881 of the power device 88 faces the filter screen 6 (backward). The space between the bottom of the drive tank 824 and the bottom of the cleaning tank 81 forms a first channel T1, the air outlet 881 is located close to or in the first channel T1, a second channel T2 is formed between the partition 84 and the second air inlet 883 of the power unit 88, see fig. 9, the space above the sieve 6 forms a third channel T3, and the space below the sieve 6 forms a fourth channel T4. The first channel T1, the fourth channel T4, the third channel T3 and the second channel T2 are sequentially in fluid communication to form a fluid circulation channel. The first passage T1 and the fourth passage T4 are in fluid communication with each other through a gap between the bottom of the rear side of the driving case 824 and the bottom of the washing tank 81, and the third passage T3 and the second passage T2 are in fluid communication with each other through a gap between the top of the partition 84 and the top of the washing tank 81. Alternatively, the first passage T1 may be formed by providing a separate partition instead of the driving case 824. The power plant 88 provides a power source for the circulation of fluid, which in this embodiment includes air and steam. A heater 882 is disposed at the air outlet 881 for heating the fluid.

The cleaning device further comprises a nozzle 89, the nozzle 89 being arranged outside the atomizer tank 83 in fluid communication with the steam generator 85. A plurality of nozzles 89 may be provided, each nozzle 89 being in fluid communication with a conduit 87 within the atomization tank 83, whereby steam generated by the steam generator 85 may be emitted through the nozzles 89 via the conduit 87. Preferably, the nozzles 89 are provided at the first and second passages T1 and T4 to inject steam into the first and second passages T1 and T4 so that the clean washing medium firstly washes the surface of the filter screen 6 facing the oil smoke.

Referring to fig. 3 to 6, when the range hood is in a cooking state and normally operates, the filter screen 6 performs a filtering function and is located in the oil smoke passage in the middle box body 2. At this time, under the action of a fan system of the range hood, the oil smoke is sucked into the range hood after being collected by the smoke collection cavity 37, the oil smoke is filtered at the filter screen 6, the front end of the filter screen 6 seals the through hole on the front side wall 21 of the middle box body 2 (or a blocking device is additionally arranged to seal, such as flaky silica gel and the like), and the cleaning chamber Q1 is in a state of being isolated from an oil smoke channel and cannot be polluted by the oil smoke.

When the cooking is finished and the sieve 6 needs to be self-cleaned, see fig. 7 and 8, the movement mechanism 82 is activated to drive the sieve 6 forward gradually into the washing chamber Q1, the direction of movement being indicated by the arrow in fig. 7.

Referring to fig. 9 to 11, when the screen 6 is completely submerged in the cleaning chamber Q1, one end of the screen 6 abuts against the rear side wall of the atomizing chamber 83, the rear side wall of the driving case 824, and the partition 84, and the screen 6 partitions the rear portion of the cleaning chamber Q1 (the portion on the rear side of the atomizing chamber 83) into upper and lower layers. Then, the water pump 86 is started, the cleaning medium is pumped into the steam generator 85, and the generated steam is injected into the third passage T3 and the fourth passage T4 in the rear portion of the cleaning chamber Q1 through the nozzle 89. Then, the power unit 88 is activated, and steam flows continuously to the screen 6 under the action of the power unit 88, flows from the fourth channel T4 below the screen 6 to the third channel T3 above the screen 6, and due to the arrangement of the partition 84 and the driving box 824, the steam can only flow from bottom to top, as indicated by the arrow in fig. 9, thereby performing sufficient steam cleaning on the screen 6. The circulation flow direction of the steam can be seen as the arrows in fig. 11, the circulation modes outside the two atomization boxes 83 are the same, high-temperature steam flows into the upper third channel T3 from the lower fourth channel T4, flows towards the left and right sides, flows along the circulation fluid channel, flows out from the position of the power device 88, is heated by the heater 882 again, realizes circulation flow cleaning, and cleans the lower surface (the surface facing the lampblack) and the upper surface (the surface facing away from the lampblack) of the filter screen 6 in sequence, particularly cleans the lower surface sufficiently.

When the steam washing is finished, the steam generator 85 and the water pump 86 are first stopped, and the power unit 88 and the heater 882 continue to operate, and then the drying process is performed to dry the inside of the filter screen 6 and the washing chamber Q1, thereby preventing the inside of the filter screen 6 and the washing chamber Q1 from mildewing. After drying, heater 882 stops working, and power device 88 continues to work, stretches out a part of filter screen 6 to middle box 2 in the back this moment, and range hood's fan system starts, cools off filter screen 6. Filter screen 6 adopts the heat conduction material to make, and the similar fin of filter screen 6 this moment dispels the heat fast with the inside high temperature of purge chamber Q1, prevents the damage of long-time high temperature to components and parts in the purge chamber Q1. After cooling, the filter screen 6 is reset to the initial position, and the oil smoke channel of the middle box body 2 is closed again.

In this embodiment, the filter screen 6 is disposed in the middle box 2 and moves back and forth to switch the positions of the oil smoke passage and the cleaning chamber Q1, alternatively, the filter screen 6 may also be disposed in the lower box 3 or the upper box 1, and move back and forth or move up and down to switch the positions of the oil smoke passage and the cleaning chamber Q1. Alternatively, the filter screen 6 may be configured to switch the positions of the soot passage and the cleaning chamber Q1 in a multi-directional translation, rotation, or a combined motion of rotation and translation. Alternatively, other existing structures capable of filtering oil smoke may be used instead of the filter screen. As long as make filter equipment such as filter screen can move relative to the box structure, can switch between two positions in oil smoke passageway and purge chamber Q.

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 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 element, 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 through, or a combination thereof.

Claims

1. The utility model provides a range hood, includes box structure, the filter equipment of lateral extension and is used for carrying out abluent belt cleaning device to filter equipment, first air intake (5) have been seted up to box structure's bottom, box structure's inside is formed with the oil smoke passageway that the oil smoke supplied passes through, belt cleaning device is including setting up at the outside washing case (81) of box structure, space formation purge chamber (Q1) in the washing case (81), its characterized in that: when the range hood is in a working state, the filtering device is positioned in the oil smoke channel, and the cleaning chamber (Q1) is closed and isolated from the oil smoke channel; when the range hood is in a self-cleaning state, the filtering device is moved into a cleaning chamber (Q1) and can be cleaned by a cleaning medium;

a fluid circulation channel for flowing of a cleaning medium is formed in the cleaning chamber (Q1), a power device (88) is further arranged in the cleaning chamber (Q1), and the power device provides power for flowing of the cleaning medium, so that the cleaning medium flows in a circulating mode along the surface, facing towards the oil smoke, of the filtering device, the surface, facing away from the oil smoke, of the filtering device, the power device (88) and the surface, facing towards the oil smoke, of the filtering device.

2. The range hood of claim 1, wherein: the power device (88) is a fan, the cleaning device further comprises an atomization box (83) arranged in the cleaning box (81), a steam generator (85) used for converting liquid cleaning media into steam is arranged in the atomization box (83), and the cleaning device further comprises a nozzle (89) used for spraying the cleaning media into the fluid circulation channel.

3. The range hood of claim 2, wherein: a liquid storage chamber (Q2) used for storing cleaning media is formed in the atomization box (83), a liquid inlet (811) communicated with the liquid storage chamber (Q2) is formed in the cleaning box (81), and the liquid inlet (811) is used for being communicated with an external cleaning media source.

4. The range hood of claim 2, wherein: the cleaning device further comprises a heater (882) for heating the cleaning medium, the heater (882) being located in the fluid circulation channel.

5. The range hood of claim 2, wherein: the cleaning device also comprises a movement mechanism (82) for driving the filtering device to move, the movement mechanism (82) comprises a driving mechanism (821) which is fixedly arranged in the cleaning box (81) and provides driving force, and a driving box (824) is arranged outside the driving mechanism (821).

6. The range hood of claim 5, wherein: said washing tank (81) comprising opposite first and second sides, said filtering means entering the washing chamber (Q1) from a third side formed between the first and second sides, a partition (84) being provided adjacent to the end of the nebulization tank (83) facing the third side, said power means (88) having a second air intake (883) and an air outlet (881), said second air intake (883) being remote from the filtering means, the space between said driving tank (824) and the second side of the washing tank (81) constituting a first passage (T1), said air outlet (881) being close to or in the first passage (T1) and facing the filtering means, the range hood is characterized in that a second channel (T2) is formed by a space between the partition plate (84) and the second air inlet (883), when the range hood is in a self-cleaning state, one side, facing a third side of the cleaning box (81), of the atomizing box (83), the partition plate (84) and the driving box (824) is respectively abutted to a filtering device, a third channel (T3) is formed by a space between the filtering device and the first side of the cleaning box (81), a fourth channel (T4) is formed by a space between the filtering device and the second side of the cleaning box (81), one side, facing the second side of the cleaning box (81), of the filtering device is a surface facing oil smoke, and the first channel (T1), the fourth channel (T4), the third channel (T3) and the third channel (T3) are arranged, the second channel (T2) is sequentially communicated with fluid to form a fluid circulation channel, and the third channel (T3) is communicated with the second channel (T2) through a gap between the partition plate (84) and the first side of the cleaning box (81).

7. The range hood of claim 6, wherein: the nozzle (89) is disposed within the first channel (T1) and the fourth channel (T4).

8. The range hood of claim 7, wherein: the range hood is characterized in that the driving box (824) and the atomizing box (83) are tightly attached to the first side of the cleaning box (81), the partition plate (84) is tightly attached to the second side of the cleaning box (81), when the range hood is in a self-cleaning state, the end part, facing the first side of the cleaning box (81), of the partition plate (84) is flush with the filtering device, and the end part, facing the second side of the cleaning box (81), of the driving box (824) is flush with the filtering device.

9. The range hood of claim 6, wherein: wash case (81) and set up the front side at the box structure, filter equipment passes through the preceding back translation and switches over the position between oil smoke passageway and purge chamber (Q1), first side is the top of wasing case (81), the second side is the bottom of wasing case (81), the third side is the rear side of wasing case (81), baffle (84) extend in the left right direction.

10. The range hood of claim 1, wherein: the cleaning device further comprises a moving mechanism (82) used for driving the filtering device to move, wherein the moving mechanism (82) is a linear driving module, so that the filtering device can switch positions between the lampblack channel and the cleaning chamber (Q1) in a translation mode.

11. The range hood of claim 10, wherein: the motion mechanism (82) comprises a driving mechanism (821), a screw rod (822) and a nut (823), the driving mechanism (821) is fixedly arranged in the cleaning box (81), the driving mechanism (821) is in transmission connection with the screw rod (822) and can drive the screw rod (822) to rotate around the axis of the driving mechanism, the nut (823) is sleeved on the screw rod (822) and is in threaded connection with the screw rod (822), and the nut (823) is fixed with the filtering device.

12. The range hood of claim 10, wherein: the box structure includes middle box (2) and lower box (3), the bottom and the lower box (3) of middle box (2) are connected to fluid intercommunication each other between middle box (2) and the lower box (3), box (3) are greater than middle box (2) in the ascending size in front and back direction down, box (3) bottom under is seted up in first air intake (5), wash case (81) and be located the front side of middle box (2) and be located the top of lower box (3), range hood when operating condition, filter equipment is located the oil smoke passageway in middle box (2).

13. The range hood according to any one of claims 1 to 12, wherein: the cleaning box (81) is tightly attached to the outer side of the box body structure, and when the range hood is in a working state, the cleaning chamber (Q1) is closed through the end part of the filtering device.

14. The range hood according to any one of claims 1 to 12, wherein: the filtering device is a filter screen (6) made of heat conducting materials.