CN108758747A

CN108758747A - Range hood

Info

Publication number: CN108758747A
Application number: CN201810836171.6A
Authority: CN
Inventors: 杨星星; 季俊生; 秦兴元; 方云超; 区胜
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2018-11-06

Abstract

The invention discloses a kind of range hood, including casing (100), which is equipped with casing interface portion (10)；Internal washing system is located in the casing (100)；And extensional mode spray gun, it is removably matched by spray gun connector portion and is plugged in the casing interface portion (10)；Wherein, when the spray gun connector portion connects casing interface portion (10), the cleaning fluid of the internal washing system is introduced by the casing interface portion (10) in the extensional mode spray gun.In the smoke machine of the present invention, extensional mode spray gun including host and as external accessory, the two forms easily operated simple plug connection, user is extremely easy to use, steam inside fluid can be introduced by casing interface portion in extensional mode spray gun, user is greatly facilitated directly to operate hearth, casing outer wall etc. outside spray gun hydro-peening.Extensional mode spray gun can be transported independently of host, packed, cleaned, be safeguarded, not influence the attractive appearance of host.

Description

Range hood

Technical field

The invention belongs to range hood fields.

Background technology

Range hood is widely used in modern kitchen, is produced by centrifugal fan suction and outer arranged in cooking process Raw most oil smoke, to safeguard the clean, salubrious of kitchen environment.In the course of work of range hood, inevitably By oil smoke condensation, it polluted most of structural detail, such as impeller, spiral case, air duct etc. in range hood.For this purpose, existing skill Various internal washing systems are pointedly devised in art, the various modes such as wash for example, by using washing, steam, in effective cleaning machine Component reduces the inside windage of range hood, range hood is enable to keep preferable working performance.

However, in current range hood internal washing system, only the internal structural elements such as spiral case are cleaned.Due to Range hood evening is switched on or the various reasons such as oil smoke pumping function variation, and always have part oil cigarette in cooking process is not inhaled completely It receives and is discharged by smoke machine, the oil smoke of this fraction will be retained and constantly pollute hearth, casing outer wall etc. in the course of time, need to use Inconvenience, cumbersome and optional is caused in manual wiping cleaning hearth etc. the big place of greasy dirts amount of family frequently to user The cleaning means selected is few, and selection is difficult.

Invention content

For the drawbacks described above or deficiency of the prior art, the present invention provides a kind of range hoods, and user can be facilitated clear It is inside and outside to wash smoke machine, easy to operate, practical, users' satisfaction degree is high.

To achieve the above object, the present invention provides a kind of range hood, the range hood includes：

Casing, the casing are equipped with casing interface portion；

Internal washing system is located in the casing；And

Extensional mode spray gun is removably matched by spray gun connector portion and is plugged in the casing interface portion；

Wherein, when the spray gun connector portion connects the casing interface portion, the cleaning fluid of the internal washing system is logical The casing interface portion is crossed to be introduced into the extensional mode spray gun.

Preferably, the casing interface portion includes the fluid stream being serially connected in the internal fluid pipe of the internal washing system Incoming interface and fluid flow out inner joint, and the range hood further includes accessory connecting tube, the both ends difference of the accessory connecting tube It is removably attachable to the fluid stream incoming interface and fluid flows out inner joint so that the internal fluid pipe is connected；Wherein, described Accessory connecting tube is alternatively connected to the fluid stream incoming interface with the spray gun connector portion.

Preferably, the accessory connecting tube is U-tube.

Preferably, the spray gun connector portion includes adapter and spray gun connector, the adapter and the casing interface portion Grafting is matched, the adapter goes out external tapping equipped with fluid stream, and the spray gun connector is detachably inserted into the fluid outflow External tapping.

Preferably, the casing interface portion is fixedly installed on the casing, the adapter and the accessory connecting tube For the peripheral hardware accessory that can be separated with the casing.

Preferably, the extensional mode spray gun further includes carrying the spray gun hand-held part of nozzle and being connected to the spray gun to hold The gun hose in portion and the spray gun connector.

Preferably, the spray gun connector and the fluid stream are formed as anti-leak plug between going out external tapping.

Preferably, the fluid stream, which goes out, is equipped with normally closed check valve in the runner of external tapping, the normally closed check valve is set as Only opening valve port when the fluid stream goes out external tapping is plugged in the spray gun connector go out external tapping so that the fluid stream is connected.

Preferably, when the adapter is with casing interface portion pairing grafting；

The fluid stream incoming interface is connected to the fluid stream and goes out external tapping and fluid outflow inner joint, and institute simultaneously The internal flow tube portion for stating the downstream of fluid outflow inner joint is equipped with the back pressure check valve that band presets back pressure；

Alternatively, the fluid stream incoming interface, which is connected to the fluid stream, goes out external tapping, and the casing interface portion further includes The back pressure that the band being arranged in the runner between the fluid stream incoming interface and fluid outflow inner joint presets back pressure is unidirectional Valve.

Preferably, the default back pressure of the back pressure check valve can be adjusted.

Preferably, triple valve is equipped in the adapter, the triple valve includes described in the fluid stream incoming interface connection The interior conducting position of fluid outflow inner joint is connected to the outer conducting position that the fluid stream goes out external tapping, institute with the fluid stream incoming interface It states triple valve and is cut for executing conducting position in the spray gun connector, the adapter and the casing interface portion mutually grafting It changes.

Preferably, the fluid stream goes out the microswitch for the control valve member that external tapping is equipped with as the triple valve, described Spray gun connector and the fluid stream, which go out when external tapping is plugged into, triggers the microswitch, and the microswitch is in the shape that is triggered Promote the triple valve to switch to the outer conducting position under state, and promotes the triple valve to cut under non-toggle reset state Shift to the interior conducting position.

Preferably, the pressure opening and closing valve of the control valve member as the triple valve, the pressure are additionally provided in the adapter Power switch valve is used to detect the fluid Fluid pressure of the fluid stream incoming interface and reaches default pressure in the fluid Fluid pressure The triple valve is controlled when force threshold switches to the interior conducting position.

Preferably, the triple valve is the solenoid valve of two-bit triplet.

Preferably, the internal washing system includes connecting upstream end and the fluid outflow of the fluid stream incoming interface The pressure release shunt circuit of the downstream of inner joint, the spray gun connector, the adapter and the casing interface portion mutually When grafting, casing is formed with to inner flow passage between the fluid stream incoming interface and fluid outflow inner joint, the pressure release is simultaneously It is in parallel to inner flow passage with the casing to join circuit, normally closed type relief valve is equipped in the pressure release shunt circuit.

Preferably, the casing interface portion and the adapter are equipped with the attaching plug and power supply slot of pairing grafting Portion.

Preferably, the casing interface portion and the adapter are respectively formed as fixation jack box and the movement of pairing grafting Jack box.

Preferably, the internal washing system includes steam generator or heating device and cleaning jet pipe, the inside Fluid hose includes the upstream internal fluid hose between the steam generator or heating device and the fluid stream incoming interface And flow out the downstream inner fluid hose between inner joint and the cleaning jet pipe positioned at the fluid.

In the range hood of the present invention, including host and the extensional mode spray gun as external accessory, the spray gun and host Between form easily operated simple plug connection, user is extremely easy to use, and when spray gun is plugged in host, steam inside is clear The vapor stream for washing system is introduced by casing interface portion in extensional mode spray gun, and user is greatly facilitated directly to operate spray gun hydro-peening External hearth, casing outer wall etc..And the extensional mode spray gun as accessory can be transported, packed independently of host, being cleaned, Safeguard etc., the attractive appearance of host is not influenced.Therefore the present invention utilizes steam inside, and external equipment is cleaned in such a way that steam is washed, Can big convenience user, improve user satisfaction, energy conservation and environmental protection.

Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.

Description of the drawings

Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：

Fig. 1 is the assembling explosive view according to the range hood of the preferred embodiment of the present invention；

Fig. 2 is the stereogram of Fig. 1, and structure in the casing of range hood is illustrated in figure；

Fig. 3 is the stereogram of the range hood of Fig. 1 after assembling；

Fig. 4 is the stereogram of Fig. 3, and structure in the casing of range hood is illustrated in figure；

Fig. 5 and Fig. 6 is illustrated with stereogram and plan view wait for grafting between casing interface portion and adapter respectively State；

Fig. 7 and Fig. 8 illustrates the grafting between casing interface portion and adapter with stereogram and plan view respectively State；

Fig. 9 illustrates the inserting state between casing interface portion and accessory connecting tube；

Figure 10 is the schematic diagram according to the steaming-out system of the first preferred embodiment；

Figure 11 is the schematic diagram according to the steaming-out system of the second preferred embodiment；

Figure 12 is the schematic diagram according to the steaming-out system of third preferred embodiment.

Reference sign：

100 casing, 10 casing interface portion

20 accessory connecting tube, 30 adapter

40 spray gun connector, 50 gun hose

60 spray gun hand-held parts

A fluid stream incoming interface B1 fluids flow out inner joint

B2 fluid streams go out external tapping L1 upstream internal fluid hoses

L2 downstream inner fluid hose L3 pressure releases shunt circuit

1 water tank, 2 water pump

3 relief valve, 4 steam generator

5 cleaning 6 impellers of jet pipe

7 separator-filter, 8 spiral case

101 back pressure check valve, 102 normally closed type relief valve

Jack box is fixed in 103 power supply slot portions 104

301 normally closed check valve, 302 triple valve

303 pressure opening and closing valve, 304 attaching plug

305 movement jack boxs

Specific implementation mode

The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.

It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.

In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is with attached drawing Shown on the basis of liquid heating either for it is vertical, vertically or on gravity direction for each component mutual alignment Relationship description word.

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The invention discloses a kind of range hoods with removable extensional mode spray gun.As shown in Figures 1 to 4, the suction Kitchen ventilator includes：

Casing 100, the casing 100 are equipped with casing interface portion 10；

Internal washing system is located in casing 100；And

Extensional mode spray gun is removably matched by spray gun connector portion and is plugged in casing interface portion 10；

Wherein, when spray gun connector portion connection casing interface portion 10, the cleaning fluid of internal washing system passes through casing interface Portion 10 is introduced into extensional mode spray gun.

As it can be seen that the extensional mode spray gun combines internal washing system, connect with casing using the spray gun connector portion of pairing grafting Oral area 10 draws the cleaning fluid of internal washing system by the dismountable pluggable mode of the two toward spray gun, user-friendly Spray gun hydro-peening hearth, casing outer wall etc..

Intrinsic part of the extensional mode spray gun as the attached installation fitting of range hood rather than the host of range hood, because And can extensional mode spray gun be disconnected and be packed up with host when range hood works normally, host beauty is not influenced.It is needing When wanting, extensional mode spray gun and host can be matched grafting, hearth etc. is cleaned using the steam etc. in host.Equally, as Peripheral hardware accessory, extensional mode spray gun and host can independent packaging, transport and maintenance, it is extremely convenient.

Therefore, when extensional mode spray gun is attached to steam washing the steam inside of range hood and washing in system, how to realize The high plug connection of the respective independence and reliability of extensional mode spray gun and host, becomes most crucial place.In the present invention, Casing interface portion 10 and spray gun connector portion are devised particular for property, are specifically described respectively below with reference to attached drawing.

As shown in figure 9, in this specific embodiment, casing interface portion 10 includes being serially connected with the inside of internal washing system Fluid stream incoming interface A in fluid hose and fluid outflow inner joint B1.Range hood further includes accessory connecting tube 20, accessory connection The both ends of pipe 20 are removably attachable to fluid stream incoming interface A respectively and fluid flows out inner joint B1 so that internal fluid pipe is connected； Wherein, accessory connecting tube 20 is alternatively connected to fluid stream incoming interface A with spray gun connector portion.Wherein, accessory connecting tube 20 is preferably The U-tube of diagram.

Preferably, casing interface portion 10 is fixedly installed on casing 100, and adapter 30 and accessory connecting tube 20 are can be with The peripheral hardware accessory that casing 100 is separated.In this way, when range hood works normally, user need to only connect accessory connecting tube 20 In in casing interface portion 10, you can ensure internal washing system worked well, does not influence casing beauty, and extensional mode spray gun can be received It hides.When needing to clean external hearth, extensional mode spray gun can be passed through spray gun connector portion and 10 grafting of casing interface portion, you can will Steam inside fluid is exported with jet cleaning casing outer wall, hearth etc., for a user, easy to operate practicality.

In a kind of preferred structure, the adapter 30 and spray gun connector 40 that can be mutually inserted constitute spray gun connector portion, referring to Fig. 2.In Fig. 5 to Fig. 8, adapter 30 matches grafting with casing interface portion 10, and adapter 30 goes out external tapping B2 equipped with fluid stream, Spray gun connector 40 is detachably inserted into fluid stream and goes out external tapping B2.In addition, extensional mode spray gun further includes the spray gun with nozzle Hand-held part 60 and the gun hose 50 for being connected to spray gun hand-held part 60 and spray gun connector 40.Spray gun hand-held part 60 is for user hand Hold operation, such as switching manipulation.Gun hose 50 is used to extend the clean range of extension spray gun.

Wherein preferably, spray gun connector 40 and fluid stream should be formed as anti-leak plug between going out external tapping B2, to avoid The outside loss of internal flow, waste of resource increase energy consumption.

It will be appreciated to those of skill in the art that this anti-leak connect-disconnect structure can be varied.Referring to Fig. 8 and figure 10, in this embodiment, fluid stream, which goes out, is equipped with normally closed check valve 301 in the runner of external tapping B2, normally closed check valve 301 is arranged Valve port is opened with channeling fluid outflow external tapping B2 to be only plugged in when fluid stream goes out external tapping B2 in spray gun connector 40.Specifically Ground abuts valve in the spool of non-inserting state, normally closed check valve 301 under the action of internal fluid pressure and/or spring pressure Mouthful, to sealing fluid outflow external tapping B2.Go out in external tapping B2 and if only if the insertion of spray gun connector 40 fluid stream and inwardly pushes up It, can channeling fluid outflow external tapping B2 when valve opening core.

In one embodiment, using the mechanical plug of anti-leak, by mechanically plugging control fluid flow direction Switching, referring to Figure 10.When adapter 30 and casing interface portion 10 match grafting, fluid stream incoming interface A is connected to fluid stream simultaneously Go out external tapping B2 and fluid outflow inner joint B1, and referring to Figure 10, fluid flows out the internal fluid pipe in the downstream of inner joint B1 Partly (i.e. downstream inner fluid hose L2) is equipped with the back pressure check valve 101 that band presets back pressure.That is, when extensional mode spray gun is plugged into Position, when internal flow goes out external tapping B2 outflows from fluid stream, the default back pressure of back pressure check valve 101 can prevent inner fluid streams stream Cleaning jet pipe 5 internally, in other words, steam stream all flows to spray gun.

The back pressure check valve 101 that above-mentioned band presets back pressure is arranged outside casing interface portion 10, the downstream specially illustrated In internal fluid pipe L2.Certainly, back pressure check valve 101 may also be arranged on inside casing interface portion 10, i.e., casing interface portion 10 is gone back Band including being arranged in the runner between fluid stream incoming interface A and fluid outflow inner joint B1 presets the back pressure check valve of back pressure 101。

It is highly preferred that the ejiction opening pressure of the spray gun hand-held part 60 of extensional mode spray gun should be adjusted, therefore back pressure check valve 101 default back pressure is sufficiently high, or can accordingly be adjusted.But excessive default back pressure will influence the outlet stream of cleaning jet pipe 5 Body air pressure.

In another embodiment, it uses triple valve 302 and is switched with the flow direction for controlling fluid, as shown in Figure 11, Figure 12.

Referring to Fig. 5 to Fig. 8, triple valve 302 is equipped in adapter 30, triple valve 302 includes fluid stream incoming interface A connection streams The interior conducting position of body outflow inner joint B1 is connected to the outer conducting position that fluid stream goes out external tapping B2, triple valve with fluid stream incoming interface A 302 for executing the switching of conducting position in spray gun connector 40, adapter 30 and casing 10 mutually grafting of interface portion.

Wherein, triple valve 302 is preferably the solenoid valve of two-bit triplet, conveniently automatically controls, controls under the proper conditions Runner switches.Control switching condition or parameter can have various, such as can be local pressure, temperature etc..

Figure 11 illustrates control mode of the pressure opening and closing valve 303 as the switching control valve of triple valve 302.Extremely referring to Fig. 5 Fig. 8, the interior pressure opening and closing valve 303 for being equipped with the control valve member as triple valve 302 of adapter 30, pressure opening and closing valve 303 is for examining Fluid measured flows into the Fluid pressure of interface A and is controlled when Fluid pressure reaches preset pressure threshold value in triple valve 302 switches to Position is connected.

Specifically, when extensional mode spray gun is extracted, fluid stream goes out external tapping B2 and is blocked by normally closed check valve 301 so that stream The pressure that body flows into the upstream internal fluid hose L1 of the upstreams interface A increases, and pressure increases to the setting switching of pressure opening and closing valve 303 When threshold value, triggering triple valve 302 is executed into commutation action, switches to interior conducting position, that is, upstream internal fluid hose L1 is connected under Swim internal fluid pipe L2.Certainly, it is well known by those skilled in the art that pressure opening and closing valve 303 is only for example, other can also be used The response control valve member of control parameter, it is not described in detail herein.

Another feasible pattern of the switching control of triple valve 302 is that mechanical triggering controls.According to extensional mode spray gun Plug Action characteristic, fluid stream go out the microswitch for the control valve member that external tapping B2 can be equipped with as triple valve 302.Specifically, One of microswitch and microswitch contact may be provided on spray gun connector 40, and fluid stream shown in Fig. 8 is arranged in another one Go out in the circumferential side wall of the inner flow passage of external tapping B2.It is triggered when spray gun connector 40 goes out external tapping B2 grafting in place with fluid stream Microswitch, microswitch promotes triple valve 302 to switch to outer conducting position under the state of being triggered, and is extracting extensional mode spray Triple valve 302 is promoted to switch to interior conducting position under the non-toggle reset state of rifle.

More securely, internal washing system may also include connecting fluid and flow into the upstream end and fluid outflow of interface A The pressure release shunt circuit L3 of the downstream of interface B1, as shown in figure 12.In spray gun connector 40, adapter 30 and casing interface portion 10 Mutually when grafting, casing is formed between fluid stream incoming interface A and fluid outflow inner joint B1 to inner flow passage, pressure release parallel connection is returned Road L3 is in parallel to inner flow passage with casing, and normally closed type relief valve 102 is equipped in the L3 of pressure release shunt circuit.In other words, it is sprayed in extensional mode When normally inserting or pull out of rifle, pressure release shunt circuit L3 is remained off by normally closed type relief valve 102.Only in threeway When the switching control failure of valve 302, the pressure of upstream internal fluid hose L1, which increases to, is enough to be connected normally closed type relief valve 102, steams Vapour Fluid pressure is successively from pressure release shunt circuit L3, downstream inner fluid hose L2 and cleaning 5 pressure release of jet pipe outflow.

Pressure release shunt circuit L3 greatly strengthens the reliability of triple valve 302.In addition, various times in Figure 10 to Figure 12 Lu Zhong is also especially provided with relief valve 3, to be further expelled directly out tube fluid by relief valve 3 in the case where pipeline builds the pressure state, Ensure that system is safe and reliable.

In addition most it is important that circuit connection when each element grafting, especially for independent pluggable components.In this reality It applies in mode, attaching plug 304 and the power supply slot portion of pairing grafting is respectively arranged in casing interface portion 10 and adapter 30 103, referring to Fig. 5 to Fig. 8.When 103 grafting of attaching plug 304 and power supply slot portion, not only inner flow passage, which is connected with each other, even leads It is logical, and provide power supply for each control valve member in adapter 30.Fig. 5, Fig. 7 are as it can be seen that power supply slot portion 103 is stacked Top in the runner interface section including fluid stream incoming interface A and fluid outflow inner joint B1, to form synchronous grafting.

It is fixed for ease of grafting operation and installation, casing interface portion 10 and adapter 30 are respectively preferably formed as pairing and insert The fixation jack box 104 and mobile jack box 305 connect.As shown in Fig. 5 to Fig. 8, each valve member and runner are arranged in jack box In box frame.Fixed jack box 104 is fixedly installed on casing 100, mobile jack box 305 and 104 shape adaptation of fixed jack box And it is slidably oriented to grafting, it is easy to operation and not error-prone.

Describe plug connection and the control between extensional mode spray gun and the host of range hood in detail above.It is complete again below The kind internal washing system for illustrating range hood.Internal washing system is commonly used in main wash centrifugal fan, especially wind Impeller 6 in machine.Cleaning way mainly has washing or steam to wash.

Wherein, in conjunction with Fig. 2, Fig. 4 and Figure 10 to Figure 12, internal washing system may include for heating to generate the steaming of steam Vapour generator 4 and for stretching into clean the cleaning jet pipe 5 of impeller 6 in spiral case 8, internal fluid pipe includes being located at steam generator It upstream internal fluid hose L1 between 4 and fluid stream incoming interface A and is flowed out between inner joint B1 and cleaning jet pipe 5 positioned at fluid Downstream inner fluid hose L2.Wherein, the cleaning solution in water tank 1 is pumped into steam generator 4 by water pump 2, by being thermally formed height Warm steam flows into upstream internal fluid hose L1, and then selectivity flows to extensional mode spray gun and carries out exterior washings, or via downstream Internal fluid pipe L2 flow direction cleaning jet pipes 5 carry out internal washing.When carrying out internal washing, cleaning solution can pass through separator-filter 7 recycle and recycle.

Internal washing system above in association with attached drawing displaying is steaming-out system, extensional mode spray gun draw steam stream with The outside plants such as hydro-peening hearth.But it will be appreciated to those of skill in the art that cleaning fluid can also be liquid form.This When, steam generator 4 can be replaced heating device, and required temperature is heated to the cleaning solution of water tank 1, then by cleaning jet pipe 5 are sprayed on impeller 6, and wheel rotor 6 is cleaned repeatedly.It should be noted that the impeller water washing mode and knot of range hood Structure is known to the public, not reinflated herein carefully to state.

Under water-washing method, it is roughly the same with steam spray that extensional mode spray gun sprays out cleaning solution, cleaning way and effect.

The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention Monotropic type, these simple variants all belong to the scope of protection of the present invention.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can The combination of energy no longer separately illustrates.

In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims

1. a kind of range hood, which is characterized in that the range hood includes：

Casing (100), the casing (100) are equipped with casing interface portion (10)；

Internal washing system is located in the casing (100)；And

Extensional mode spray gun is removably matched by spray gun connector portion and is plugged in the casing interface portion (10)；

Wherein, when the spray gun connector portion connects casing interface portion (10), the cleaning fluid of the internal washing system is logical The casing interface portion (10) is crossed to be introduced into the extensional mode spray gun.

2. range hood according to claim 1, which is characterized in that the casing interface portion (10) is described including being serially connected with Fluid stream incoming interface (A) in the internal fluid pipe of internal washing system and fluid outflow inner joint (B1), the range hood Further include accessory connecting tube (20), the both ends of the accessory connecting tube (20) are removably attachable to the fluid inflow and connect respectively Mouth (A) and fluid outflow inner joint (B1) are to be connected the internal fluid pipe；Wherein, the accessory connecting tube (20) and the spray Gun joint portion is alternatively connected to the fluid stream incoming interface (A).

3. range hood according to claim 2, which is characterized in that the accessory connecting tube (20) is U-tube.

4. range hood according to claim 2 or 3, which is characterized in that the spray gun connector portion includes adapter (30) With spray gun connector (40), the adapter (30) matches grafting with the casing interface portion (10), and the adapter (30) is equipped with Fluid stream goes out external tapping (B2), and the spray gun connector (40) is detachably inserted into the fluid stream and goes out external tapping (B2).

5. range hood according to claim 4, which is characterized in that the casing interface portion (10) is fixedly installed in described On casing (100), the adapter (30) and the accessory connecting tube (20) are outer for that can be separated with the casing (100) Establishing part.

6. range hood according to claim 4, which is characterized in that the extensional mode spray gun further includes the spray with nozzle Rifle hand-held part (60) and the gun hose (50) for being connected to the spray gun hand-held part (60) and the spray gun connector (40).

7. range hood according to claim 4, which is characterized in that the spray gun connector (40) is gone out with the fluid stream Be formed as anti-leak plug between interface (B2).

8. range hood according to claim 7, which is characterized in that the fluid stream, which goes out in the runner of external tapping (B2), to be set There are normally closed check valve (301), the normally closed check valve (301) to be set as only being plugged in the fluid in the spray gun connector (40) Valve port is opened when flowing out external tapping (B2) goes out external tapping (B2) so that the fluid stream is connected.

9. range hood according to claim 8, it is characterised in that：

When the adapter (30) is with the casing interface portion (10) pairing grafting；

The fluid stream incoming interface (A) at the same be connected to the fluid stream go out external tapping (B2) and the fluid outflow inner joint (B1), and the internal flow tube portion in the downstream of fluid outflow inner joint (B1) is equipped with the back pressure that band presets back pressure Check valve (101)；

Alternatively, the fluid stream incoming interface (A), which is connected to the fluid stream, goes out external tapping (B2), and the casing interface portion (10) It further include the default back of the body of band in runner of the setting between the fluid stream incoming interface (A) and fluid outflow inner joint (B1) The back pressure check valve (101) of pressure.

10. range hood according to claim 9, which is characterized in that the default back pressure energy of the back pressure check valve (101) It is enough to adjust.

11. range hood according to claim 4, which is characterized in that be equipped with triple valve in the adapter (30) (302), the triple valve (302) includes interior the leading of fluid stream incoming interface (A) the connection fluid outflow inner joint (B1) Logical position is connected to the outer conducting position that the fluid stream goes out external tapping (B2), the triple valve (302) with the fluid stream incoming interface (A) For executing conducting in the spray gun connector (40), the adapter (30) and the casing interface portion (10) mutually grafting Position switching.

12. range hood according to claim 11, which is characterized in that the fluid stream goes out external tapping (B2) and is equipped with conduct The microswitch of the control valve member of the triple valve (302), the spray gun connector (40) go out external tapping (B2) with the fluid stream Grafting in place when trigger the microswitch, the microswitch promotes the triple valve (302) to switch under the state of being triggered To the outer conducting position, and the triple valve (302) is promoted to switch to the interior conducting position under non-toggle reset state.

13. range hood according to claim 11, which is characterized in that be additionally provided with as described in the adapter (30) The pressure opening and closing valve (303) of the control valve member of triple valve (302), the pressure opening and closing valve (303) is for detecting the fluid stream The Fluid pressure of incoming interface (A) simultaneously controls the triple valve (302) switching when the Fluid pressure reaches preset pressure threshold value To the interior conducting position.

14. range hood according to claim 11, which is characterized in that the triple valve (302) is the electricity of two-bit triplet Magnet valve.

15. range hood according to claim 11, which is characterized in that the internal washing system includes connecting the stream Body flows into the pressure release shunt circuit (L3) of the upstream end and the downstream of fluid outflow inner joint (B1) of interface (A), in institute State spray gun connector (40), the adapter (30) and the casing interface portion (10) mutually grafting when, fluid inflow connects Casing is formed with to inner flow passage, the pressure release shunt circuit (L3) and institute between mouth (A) and fluid outflow inner joint (B1) It is in parallel to inner flow passage to state casing, normally closed type relief valve (102) is equipped in the pressure release shunt circuit (L3).

16. range hood according to claim 4, which is characterized in that the casing interface portion (10) and the adapter (30) attaching plug (304) and power supply slot portion (103) of pairing grafting are equipped with.

17. range hood according to claim 16, which is characterized in that the casing interface portion (10) and the adapter (30) the fixation jack box (104) of pairing grafting and mobile jack box (305) are respectively formed as.

18. range hood according to claim 2, which is characterized in that the internal washing system includes steam generator (4) or heating device and cleaning jet pipe (5), the internal fluid pipe include positioned at the steam generator (4) or heating dress Set upstream internal fluid hose (L1) between the fluid stream incoming interface (A) and positioned at fluid outflow inner joint (B1) with Downstream inner fluid hose (L2) between the cleaning jet pipe (5).