CN217875987U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, including fan frame and self-cleaning device, self-cleaning device includes the water pump, its characterized in that: the water pump is directly or indirectly arranged on the outer side wall of the fan frame, and the outer side wall is the front, left or right side wall of the fan frame. Compared with the prior art, the utility model has the advantages of: self-cleaning device's water pump is external to arrange the fan frame lateral wall position of easily contacting in, thereby convenient to detach and maintenance can also change powerful water pump according to the in service behavior in later stage.

Description

Cooking fume exhauster

Technical Field

The utility model discloses oil smoke purifier, especially 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.

The production of the range hood enables the kitchen environment of people to be purified before the beginning, but the cleaning problem of the range hood follows the purification problem, and after the range hood is used for a period of time, a fan system in the range hood adsorbs a large amount of oil stains, so that the oil smoke absorption effect is greatly reduced. If the fan system needs to be cleaned, the fan needs to be disassembled, so that oil stains are attached extremely difficultly, the workload is large, the machine is messy, and the fan becomes a headache in cleaning and sanitation of people in home life.

In order to reduce the trouble of users, the existing range hood with the self-cleaning function is provided. With the continuous progress of the self-cleaning technology of the range hood, steam cleaning or water cleaning is widely applied to the field of self-cleaning of the range hood, the basic principle is that a steam generator generates steam, the steam or the water is conveyed to a nozzle at the tail end of a spray pipe, the steam is quickly sprayed out from the nozzle to wash an impeller for cleaning, and the impeller rotates to throw away oil by centrifugal force to finish self-cleaning.

In order to provide cleaning media such as steam or water, a water pump and a heating module are generally required to be arranged on an air outlet plate of a range hood, for example, a steam oil removal device of the range hood disclosed in chinese patent application No. 201420300618.5 includes a wind box on the range hood and an impeller installed in the wind box, the steam oil removal device is installed on the range hood close to the impeller, and the steam oil removal device is composed of a water tank, an electromagnetic valve and a steam generator; if the chinese patent that application number is 201420300618.5 discloses a take oil smoke belt cleaning device's lampblack absorber again, including the lampblack absorber main part, be provided with two unification purgers of steam hot water in the lampblack absorber main part, two unification purgers of steam hot water include the control circuit that shell and its set up, vacuum self priming pump and electric heating equipment, the water tank of being connected with the vacuum self priming pump, the water tank is connected with the outlet pipe, install the shower nozzle on the outlet pipe, electric heating equipment is including preventing dry combustion method temperature controller and the heat-generating body of setting in the water tank, the water tank comprises the case and the heating core of setting in the case, be equipped with rivers heating channel in the heating core, the heat-generating body extends to rivers heating channel.

Because the water pump and the heating module are arranged on the air outlet plate of the range hood, the maintenance and the disassembly are inconvenient; some range hoods have small air outlet plates, and water pumps and heating modules are not arranged at the positions, so that the overall structure and the die sinking of the range hood need to be changed, and the cost is high; the heating module is placed at the air outlet board and is close to the electric appliance box, the radiant heat during working is large, and electric control faults are easily caused.

In addition, the water tank of the self-cleaning device is hung at the position of the oil cup or placed on the table top of the stove, a water pump is required to have a large suction distance at the moment, the capacity of the water tank is small, and the water tank can be collected and easily lost when the self-cleaning function is not used.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, a range hood is provided, convenient to detach, maintenance and change self-cleaning device's water pump.

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 self-cleaning device, self-cleaning device includes the water pump, its characterized in that: the water pump is directly or indirectly arranged on the outer side wall of the fan frame, and the outer side wall is the front, left or right side wall of the fan frame.

In order to protect the water pump, the self-cleaning device further comprises a fixing box arranged on the outer side wall of the fan frame, the fixing box comprises a box body and a box cover covering the top of the box body, and the water pump is arranged inside the fixing box.

In order to facilitate conveying of cleaning media to the interior of the range hood for self cleaning, the self cleaning device further comprises a water tank, a first guide pipe, a second guide pipe and a nozzle, wherein the water tank is used for storing the cleaning media, the water tank is connected with the fixed box, the first guide pipe is connected between the fixed box and the fan frame, the second guide pipe and the nozzle are arranged in the fan frame, and the water tank, the water pump, the first guide pipe, the second guide pipe and the nozzle are communicated in a fluid mode.

In order to improve the self-cleaning effect, a heating module is further arranged in the fixed box, an outlet of the water pump is connected with an inlet of the heating module and is in fluid communication with the inlet of the heating module, and an outlet of the heating module is connected with a first conduit and is in fluid communication with the first conduit.

In order to connect the water tank and the fixing box conveniently, the self-cleaning device further comprises a water tank fixing seat, the water tank fixing seat is fixed on the upper surface of the box cover, and the water tank is inserted into the water tank fixing seat.

In order to facilitate the positioning and the disassembly of the water tank and the water tank connecting seat, a positioning groove is formed on the upper surface of the water tank fixing seat, a guide pillar protruding downwards is formed on the bottom surface of the water tank, and the guide pillar is inserted into the positioning groove.

For the convenience of the water tank is communicated with the water pump fluid after being connected with the water tank connecting seat, the bottom surface of the water tank is further provided with a water tank connector, a groove is formed in the upper surface of the water tank fixing seat in a downward sunken mode, the shape of the groove is matched with the water tank connector, the water tank connector is inserted, the inlet of the water pump is connected to the lower water outlet of the bottom of the groove through a third guide pipe, and the water tank, the water tank connector, the groove, the third guide pipe and the water pump fluid are communicated.

In order to avoid water leakage when the water tank is placed independently, the water tank joint comprises a hollow first connecting pipe with openings at the upper end and the lower end and a thimble arranged in the first connecting pipe, and the thimble moves up and down in the first connecting pipe; an annular flange is formed on the inner side of the lower end part of the first connecting pipe, and the thimble keeps the trend of moving downwards to be in contact with the flange so as to close the first connecting pipe; the bottom of the groove is provided with a bulge, the position of the bulge corresponds to the ejector pin, the bulge can jack the ejector pin upwards to leave the flange, and the first connecting pipe is opened to enable the water tank to be communicated with the water pump in a fluid mode.

Preferably, in order to improve the sealing effect of the first connecting pipe, the lower end portion of the thimble is configured as a thimble head portion having elasticity, and the outer periphery of the thimble head portion can abut against the flange to close the first connecting pipe.

In order to limit the moving track of the thimble conveniently, a guide post is arranged in the first connecting pipe, the guide post is of a hollow structure with at least an opening at the lower end, the upper end of the thimble penetrates through the guide post, and a gap is formed between the outer peripheral wall of the guide post and the inner peripheral wall of the first connecting pipe so that a cleaning medium can pass through the gap.

In order to keep the thimble in the trend of moving downwards, the water tank joint further comprises an elastic piece, the elastic piece is sleeved on the periphery of the thimble, the lower end part of the thimble is formed into a thimble head part with elasticity, and the elastic piece is abutted between the guide post and the thimble head part, so that the thimble keeps the trend of moving downwards.

In order to realize sealing at the connection part of the water tank connector and the groove on the water tank connecting seat, a sealing ring is arranged on the periphery of the lower end part of the first connecting pipe.

In order to facilitate the connection and fluid communication between the water pump and the drain, the drain is formed on the periphery of the protrusion, a second connecting pipe is further arranged at the bottom of the water tank fixing seat, the second connecting pipe is located below the drain and corresponds to the drain in position, and the third conduit is connected with the second connecting pipe and is in fluid communication with the second connecting pipe.

Preferably, the fixed box is mounted on the outer side wall of the fan frame through a mounting structure.

For the fixed case of dismouting, mounting structure is including fixing the mounting panel in the fan frame and fixing the first link plate on fixed case, the draw-in groove has been seted up on the mounting panel, be formed with the couple on the first link plate, couple and draw-in groove articulate the cooperation.

In order to adapt to different installation environments conveniently, the installation structure comprises an installation plate fixed on the fan frame and a second hanging plate fixed on the fixed box, the second hanging plate can be connected with positions with different heights on the installation plate, so that the installation height of the fixed box can be adjusted, and the first guide pipe is a hose.

Preferably, in order to adjust the installation height of the fixing box conveniently, a clamping groove is formed in the installation plate and penetrates through the side face, far away from the fan frame, of the installation plate; the mounting structure further comprises a screw and a nut, at least two clamping parts which are arranged at intervals are formed in the clamping groove from top to bottom, the head of the screw is clamped with any one of the clamping parts, the tail of the screw penetrates through the mounting plate forwards, and the nut penetrates through the end portion, close to each mounting plate, of the second hanging plate and is screwed down with the screw at the corresponding position.

Compared with the prior art, the utility model has the advantages of: the water pump of the self-cleaning device is arranged outside and on the outer side wall of the fan frame which is easy to contact, so that the self-cleaning device is convenient to disassemble and maintain, and the high-power water pump can be replaced according to the later use condition; the water tank is connected with the fixed seat through the water tank connecting seat, so that the water tank has a fixed placing position, the risk of losing is avoided, the water tank with large capacity can be arranged, water adding is not needed each time, and the water tank is placed at a high position, so that the suction lift of the water pump is reduced, and the performance of the water pump is improved; the fixed box can be suitable for various cupboard installation environments, and the height and the position can be adjusted; most parts of the self-cleaning device are arranged outside the channel through which the oil smoke passes, so that oil pollution can be avoided.

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 self-cleaning device of a range hood according to an embodiment of the present invention;

fig. 3 is a schematic view of an installation structure of a self-cleaning device of a range hood according to an embodiment of the present invention;

fig. 4 is an exploded schematic view of a mounting structure of a self-cleaning device of a range hood according to an embodiment of the present invention;

fig. 5 is an exploded view of the water tank, the water tank fixing seat and the fixing box of the range hood according to the embodiment of the present invention;

fig. 6 is a cross-sectional view of the water tank, the water tank fixing seat and the fixing box of the self-cleaning device of the range hood according to the embodiment of the present invention;

FIG. 7 is an enlarged view of a portion I of FIG. 6;

fig. 8 is a schematic view of a water tank of the self-cleaning device of the range hood according to the embodiment of the present invention;

fig. 9 is an exploded schematic view of a water tank joint of a water tank of a self-cleaning device of a range hood according to an embodiment of the present invention;

fig. 10 is a sectional view of the water tank fixing seat of the self-cleaning device 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", etc. indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or consistent 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 includes a fan frame 100, in which a fan system (not shown) is disposed, and in this embodiment, the range hood is a ceiling-type range hood, and alternatively, the range hood may be in a side-suction type or a low-suction type, as long as the fan frame 100 is provided.

The range hood also comprises a self-cleaning device which can be used for parts or cavities in an oil smoke channel in the range hood, such as a cleaning fan system. The self-cleaning device comprises a water tank 1, a water tank fixing seat 2, a fixing tank 3, a first conduit 41, a second conduit 42, a nozzle 5 and a mounting structure 6. The self-cleaning device is an external structure, wherein the water tank 1, the water tank fixing seat 2, the fixing box 3, the first guide pipe 41 and the mounting structure 6 are arranged outside the fan frame 100, and the second guide pipe 42 and the nozzle 5 are located inside the range hood, such as inside the fan frame 100.

The water tank 1 is used for storing cleaning media, such as water, cleaning agents and the like, which can enter the fixed tank 3. The fixed box 3 is internally provided with a water pump 7 and a heating module 8, an inlet of the water pump 7 is communicated with the water tank 1 in a fluid mode, an outlet of the water pump 7 is communicated with an inlet of the heating module 8 in a fluid mode, and therefore cleaning media in the water tank 1 can be pumped into the heating module 8. Alternatively, the water pump 7 may be directly on the wind turbine frame 100.

One end of the first duct 41 is connected to a first duct joint 43 provided on the stationary box 3, and the other end of the first duct 41 is connected to a second duct joint 44 provided on the fan frame 100, preferably, the first duct joint 43 is provided on and through a wall surface of the stationary box 3, and the second duct joint 44 is provided on and through a wall surface of the fan frame 100, so as to facilitate attachment and detachment. Each of the conduit connectors described above may be a quick connector. The outlet of the heating module 8 is connected to and in fluid communication with the first conduit 41 by a first conduit connector 43. While the second conduit 42 is also connected to the above-mentioned second conduit connection 44, the nozzle 5 may be arranged at the end of the above-mentioned second conduit 42 remote from the second conduit connection 44, whereby the first conduit 41, the second conduit 42 and the nozzle 5 are in fluid communication, and the cleaning medium in the tank 1 may be cleaned by the first conduit 41, the second conduit 42 and finally sprayed by the nozzle 5. The first conduit 41 is a hose.

Water tank 1, water tank fixing base 2 and fixed box 3 set gradually by supreme down, and fixed box 3 passes through mounting structure 6 to be installed on the lateral wall of fan frame 100, in this embodiment, installs the front side at fan frame 100. The outer sidewalls of the blower housing 100 herein refer to the sidewalls of the front, left and right sides. Referring to fig. 3 to 5, the fixing box 3 includes a box 31 and a box cover 32 covering the top of the box 31, the box cover 32 and the box 31 are detachable, and the box 31 is mounted on the blower frame 100 through a mounting structure 6. The mounting structure 6 includes mounting plates 61 located on opposite sides (right and left sides) of the fixed box 3, and in the present embodiment, each mounting plate 61 has a long bar shape and extends in the longitudinal direction. The mounting plate 61 may be fixed to the wall surface of the outer side wall of the blower frame 100 by means of screws or gluing.

The mounting plate 61 is provided with a clamping groove 62, and the clamping groove 62 penetrates through the top surface of the mounting plate 61 and the front side surface far away from the fan frame 100. The mounting structure 6 further includes a first peg plate 63, a second peg plate 64, a hook 65, a screw 66 and a nut 67. Wherein the first and second clevis plates 63, 64 are spaced apart from one another and each extend between two of the mounting plates 61. The first peg board 63 and the second peg board 64 are both arranged on a side of the stationary box 3 close to the wind turbine frame 100, as shown in this embodiment on the rear side. The first hanging plate 63 is located above the second hanging plate 64, a hook 65 is formed at the end part of the first hanging plate close to each mounting plate 61, and the hook 65 can be hung downwards in the clamping groove 62 from the top of the clamping groove 62, so that the front and back positions of the fixed box 3 and the mounting plates 61 are limited. Preferably, the first hanging plate 63 is fixed to the box cover 32, and the second hanging plate 64 is fixed to the box body 31.

At least two clamping parts 68 arranged at intervals are formed in the clamping groove 62 from top to bottom, and a clamping position for clamping the screw 66 is formed at each clamping part 68. The head of the screw 66 engages the engaging portion 68 and the tail of the screw 66 extends forwardly through the mounting plate 61. A nut 67 can be passed through the end of the second clevis 64 close to each mounting plate 61 and tightened with a screw 66 in a corresponding position, defining the upper and lower position of the fixed box 3. Due to the at least two clamping parts 68, the clamping height of the screw 66 (the clamping parts 68 clamped at different positions) can be adjusted, so that the installation height of the fixed box 3 can be adjusted according to the spatial position of the cabinet in the home of the user to adapt to different cabinet spaces. Preferably, the screw 66 is a T-shaped screw having a large head for engaging with the engaging portion 68, and the nut 67 is a hand nut.

If some cabinets have shallow depth and cannot be packed on the front side wall of the fan frame 100, the water tank 1, the water tank fixing seat 2 and the fixing box 3 of the self-cleaning device can be arranged on the left side or the right side of the fan frame 100. Since the first conduit 41 is a hose, there is no limitation in the installation position of the above components. The connection mode of the second hanging plate 64 and the mounting plate 61 with adjustable mounting height can also adopt other schemes in the prior art.

Referring to fig. 5 to 10, the tank holder 2 may be fixed to the tank cover 32 of the fixed tank 3 by means of screws or adhesives. A positioning groove 21 is formed on the upper surface of the water tank fixing seat 2, a guide pillar 11 protruding downwards is formed on the bottom surface of the water tank 1, and the guide pillar 11 can be inserted into the positioning groove 21, so that the positioning of the water tank 1 and the water tank fixing seat 2 is completed. In the present embodiment, the positioning slots 21 and the guide pillars 11 are four and respectively arranged in a rectangular shape. Thereby making the installation between the water tank 1 and the tank holder 2 smooth. The depth of the positioning groove 21 is slightly larger than the height of the guide post 11, so that the guide post 11 does not contact the bottom of the positioning groove 21 when the water tank 1 is placed on the water tank fixing base 2. The top surface of water tank 1 is provided with blanking cover 12, when need pour the cleaning medium in the water tank 1 or need add cleaning medium to the water tank 1 in, only need with blanking cover 12 open can, reset blanking cover 12 and carry out the shutoff after the completion.

The bottom surface of the water tank 1 is also provided with a water tank joint 13 which penetrates downwards into the water tank fixing seat 2. The tank joint 13 includes a hollow first connection pipe 131 opened at both upper and lower ends, and an ejector pin 132 provided in the first connection pipe 131, the ejector pin 132 being movable up and down in the first connection pipe 131. The upper end of the first connection pipe 131 is in fluid communication with the water tank 1. In order to define the motion trace of the thimble 132, a guide post 133 is disposed in the first connecting tube 131 near the upper end, the guide post 133 is a hollow structure with at least a lower end opened, and the upper end of the thimble 132 can pass through the guide post 133, so that the guide post 133 defines the thimble 132 to move in the up-down direction. In the present embodiment, the guide post 133 is open at both upper and lower ends. A gap is formed between the outer circumferential wall of the guide post 133 and the inner circumferential wall of the first connecting pipe 131 for the cleaning medium to pass through, a connecting rod or the like may be disposed on the outer circumferential wall of the guide post 133 to be connected to the inner circumferential wall of the first connecting pipe 131, and the guide post 133, the first connecting pipe 131 and the connecting rod for connection may be integrated.

The inner side of the lower end of the first connecting pipe 131 is formed with a flange 134, the lower end of the thimble 132 is configured as a thimble head 1321, the thimble head 1321 has elasticity, and if the thimble 132 is preferably made of rubber, preferably, the inner circumference of the flange 134 and the outer circumference of the thimble head 1321 are both circular, and the outer diameter of the thimble head 1321 is not smaller than the inner diameter of the flange 134, so that when the thimble 132 moves downward to the lowest position, the outer circumference of the thimble head 1321 abuts against the flange 134, and thus the space above the flange 134 and below the flange 134 in the first connecting pipe 131 is isolated, so that the first connecting pipe 131 is closed, the tank joint 13 is sealed, and water leakage is avoided when the tank 1 is separated from the tank fixing base 2. The tank connection 13 further comprises an elastic member 135, such as a spring, which is fitted around the outer periphery of the thimble 132 and abuts between the guide post 133 and the thimble head 1321, and applies a downward force to the thimble 132 to keep it in a tendency to block at the flange 134.

A packing 136 is provided on the outer circumference of the lower end of the first connection pipe 131.

The upper surface of the water tank fixing base 2 is formed with a groove 22 recessed downward, and if the groove 22 is preferably located at a position in the middle of the upper surface of the water tank fixing base 2, the shape of the groove 22 is adapted to the first connection pipe 131. The bottom of the groove 22 is provided with a protrusion 23, the upper end of the protrusion 23 is higher than the bottom of the groove 22, and the position of the protrusion 23 corresponds to the thimble 132. When the water tank 1 is placed downwards on the water tank fixing seat 2, the guide post 11 does not contact the bottom of the positioning groove 21, the water tank joint 13 is stressed, the sealing ring 136 is plugged into the bottom of the groove 22, sealing between the periphery of the first connecting pipe 131 and the groove 22 is realized, meanwhile, the ejector pin 132 is jacked upwards by the bulge 23 to be separated from the flange 134, and the upper end and the lower end of the first connecting pipe 131 are communicated with each other.

The bottom of the groove 22 is formed with a drain port 24 at the periphery of the projection 23. The bottom of the water tank fixing seat 2 is further provided with a second connecting pipe 25 which is positioned below the drainage port 24 and corresponds to the drainage port 24 in position. The inlet of the water pump 7 may be connected to the second connection pipe 25 through a third conduit 71, and the third conduit 71 is a hose. Thus, when the water tank 1 is mounted to the tank holder 2, fluid communication between the water tank 1 and the water pump 7 can be achieved.

Therefore, when the water pump 7 or the heating module 8 needs to be repaired, the water pump 7 or the heating module 8 can be detached only by taking down the case cover 32 of the fixed case 3.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter, referred to as a first portion and a second portion) in a unified manner, i.e., a fluid (gas, liquid or a mixture thereof) 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 member, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims (17)

1. A range hood, including fan frame (100) and self-cleaning device, self-cleaning device includes water pump (7), its characterized in that: the water pump (7) is directly or indirectly arranged on the outer side wall of the fan frame (100), and the outer side wall is the front, left or right side wall of the fan frame (100).

2. The range hood of claim 1, wherein: the self-cleaning device further comprises a fixing box (3) arranged on the outer side wall of the fan frame (100), the fixing box (3) comprises a box body (31) and a box cover (32) covering the top of the box body (31), and the water pump (7) is arranged inside the fixing box (3).

3. The range hood of claim 2, wherein: the self-cleaning device further comprises a water tank (1) used for storing cleaning media, a first guide pipe (41), a second guide pipe (42) and a nozzle (5), the water tank (1) is connected with the fixed box (3), the first guide pipe (41) is connected between the fixed box (3) and the fan frame (100), the second guide pipe (42) and the nozzle (5) are arranged inside the fan frame (100), and the water tank (1), the water pump (7), the first guide pipe (41), the second guide pipe (42) and the nozzle (5) are communicated in a fluid mode.

4. The range hood of claim 3, wherein: a heating module (8) is further arranged in the fixed box (3), an outlet of the water pump (7) is connected with and in fluid communication with an inlet of the heating module (8), and an outlet of the heating module (8) is connected with and in fluid communication with a first conduit (41).

5. A range hood as claimed in claim 3, wherein: the self-cleaning device further comprises a water tank fixing seat (2), the water tank fixing seat (2) is fixed on the upper surface of the tank cover (32), and the water tank (1) is inserted into the water tank fixing seat (2).

6. The range hood of claim 5, wherein: a positioning groove (21) is formed in the upper surface of the water tank fixing seat (2), a guide pillar (11) protruding downwards is formed in the bottom surface of the water tank (1), and the guide pillar (11) is inserted into the positioning groove (21).

7. The range hood of claim 5, wherein: the bottom surface of water tank (1) still is provided with water tank joint (13), the upper surface undercut of water tank fixing base (2) is formed with recess (22), the shape and the water tank joint (13) adaptation of recess (22) and feed water tank joint (13) insert, the entry of water pump (7) is connected to the mouth of a river (24) department down of recess (22) bottom through third pipe (71) for water tank (1), water tank joint (13), recess (22) and third pipe (71) and water pump (7) fluid intercommunication.

8. The range hood of claim 7, wherein: the water tank joint (13) comprises a hollow first connecting pipe (131) with openings at the upper end and the lower end and an ejector pin (132) arranged in the first connecting pipe (131), and the ejector pin (132) moves up and down in the first connecting pipe (131); an annular flange (134) is formed on the inner side of the lower end part of the first connecting pipe (131), and the thimble (132) keeps the trend of moving downwards to contact with the flange (134) so as to close the first connecting pipe (131); the bottom of the groove (22) is provided with a protrusion (23), the position of the protrusion (23) corresponds to the ejector pin (132), the protrusion (23) can lift the ejector pin (132) upwards to separate from the flange (134), and the first connecting pipe (131) is opened to enable the water tank (1) and the water pump (7) to be in fluid communication.

9. The range hood of claim 8, wherein: the lower end of the thimble (132) is configured as a thimble head (1321) having elasticity, and the outer periphery of the thimble head (1321) can abut against the flange (134) to close the first connecting pipe (131).

10. The range hood of claim 8, wherein: a guide post (133) is arranged in the first connecting pipe (131), the guide post (133) is of a hollow structure with at least an opening at the lower end, the upper end of the ejector pin (132) penetrates through the guide post (133), and a gap is formed between the outer circumferential wall of the guide post (133) and the inner circumferential wall of the first connecting pipe (131) for a cleaning medium to pass through.

11. The range hood of claim 9, wherein: the water tank joint (13) further comprises an elastic piece (135), the elastic piece (135) is sleeved on the periphery of the ejector pin (132), the lower end portion of the ejector pin (132) is formed into an ejector pin head portion (1321) with elasticity, and the elastic piece (135) abuts between the guide post (133) and the ejector pin head portion (1321), so that the ejector pin (132) keeps the downward moving trend.

12. The range hood of claim 8, wherein: and a sealing ring (136) is arranged on the periphery of the lower end part of the first connecting pipe (131).

13. The range hood of claim 8, wherein: the lower water gap (24) is formed at the periphery of the protrusion (23), a second connecting pipe (25) is further arranged at the bottom of the water tank fixing seat (2), the second connecting pipe (25) is located below the lower water gap (24) and corresponds to the lower water gap (24) in position, and the third conduit (71) is connected with the second connecting pipe (25) and is in fluid communication with the second connecting pipe.

14. A range hood as claimed in claim 3, wherein: the fixed box (3) is installed on the outer side wall of the fan frame (100) through the installation structure (6).

15. The range hood of claim 14, wherein: mounting structure (6) including fixing mounting panel (61) on fan frame (100) and fixing first link plate (63) on fixed case (3), draw-in groove (62) have been seted up on mounting panel (61), be formed with couple (65) on first link plate (63), couple (65) articulate the cooperation with draw-in groove (62).

16. The range hood of claim 14, wherein: mounting structure (6) are including fixing mounting panel (61) on fan frame (100) and fixing second link plate (64) on fixed case (3), second link plate (64) can be connected with the position of co-altitude on mounting panel (61) to adjust the mounting height of fixed case (3), first pipe (41) are the hose.

17. The range hood of claim 16, wherein: a clamping groove (62) is formed in the mounting plate (61), and the clamping groove (62) penetrates through the side face, far away from the fan rack (100), of the mounting plate (61); mounting structure (6) still include screw (66) and nut (67), be formed with two at least block portion (68) of interval arrangement from top to bottom in draw-in groove (62), the head and arbitrary block portion (68) block of screw (66), mounting panel (61) is passed forward to the afterbody of screw (66), nut (67) are passed and are screwed up with the screw (66) of relevant position from the tip that second link plate (64) are close to every mounting panel (61).

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