CN217250057U

CN217250057U - Nozzle, cleaning mechanism applying nozzle and range hood

Info

Publication number: CN217250057U
Application number: CN202122651928.4U
Authority: CN
Inventors: 张岩; 王发银; 韩国强
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-08-23
Anticipated expiration: 2031-11-01

Abstract

The utility model discloses a nozzle, applied wiper mechanism and range hood that has this nozzle, this nozzle include the nozzle body, this internal feed liquor chamber that supplies the fluid to get into and with fluid spun fluid injection runner that is formed with of nozzle, on the flow path of fluid, the feed liquor chamber is located the upper reaches of fluid injection runner, its characterized in that: the nozzle also comprises an anti-blocking mechanism arranged in the nozzle body, when the nozzle is in a working state, the fluid jet flow channel is opened, and when the nozzle is in a non-working state, the anti-blocking mechanism at least blocks the minimum caliber of the fluid jet flow channel. Compared with the prior art, the utility model has the advantages of: when the nozzle is in a non-working state, the minimum caliber of the fluid jet flow channel is blocked, the nozzle can be protected, the influence on use caused by the blockage of the nozzle is avoided, and the anti-blocking mechanism is located in the nozzle and is prevented from being polluted and losing efficacy.

Description

Nozzle, cleaning mechanism applying nozzle and range hood

Technical Field

The utility model relates to a cleaning equipment, especially a nozzle, the wiper mechanism who has this nozzle is used to and the range hood that has this wiper mechanism is used.

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.

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, and the basic principle is that a steam generator generates steam or water pumped by a water pump, the steam or water is conveyed to a nozzle at the tail end of a spray pipe, the steam or water is quickly sprayed out of the nozzle to act on the surface of a target object, and oil stains are softened and peeled by means of chemical effects, hot melting, impact force and the like. However, due to the limitation of the use environment, the cleaning system can only work under the working condition of low pressure and small flow, so that the impact force can only be increased by limiting the outlet diameter of the nozzle to increase the rear end pressure. However, the range hood is internally provided with an environment with serious oil pollution and a small diameter, which means that the range hood is in the environment for a long time, and the range hood can cause blockage to cause functional failure, so that a certain anti-blocking design needs to be performed on the nozzle.

In the existing nozzle anti-blocking scheme, as disclosed in chinese patent No. 201420305282.1, a nozzle is formed at one end of a nozzle body, a baffle is disposed at the front end of the nozzle, the baffle is movably connected with the nozzle body through a connecting structure, and the baffle rotates away from the nozzle by taking the connecting structure as a center.

When the anti-blocking scheme is used in a range hood, the rotating mechanism on the baffle can be attached by oil smoke due to being in an oil smoke environment for a long time, so that the phenomenon of insensitive opening and even no opening can occur, and the range hood cannot be normally used.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is not enough to above-mentioned prior art exists, provides a nozzle, can prevent to block up and can ensure normal work simultaneously.

The second technical problem to be solved by the present invention is to provide a cleaning mechanism with the above nozzle.

The utility model aims to solve the third technical problem that a range hood that uses there is above-mentioned wiper mechanism is provided.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: a nozzle comprising a nozzle body, wherein a liquid inlet chamber for a fluid to enter and a fluid injection flow channel for injecting the fluid are formed in the nozzle body, and the liquid inlet chamber is located upstream of the fluid injection flow channel on a flow path of the fluid, and the nozzle is characterized in that: the nozzle also comprises an anti-blocking mechanism arranged in the nozzle body, when the nozzle is in a working state, the fluid jet flow channel is opened, and when the nozzle is in a non-working state, the anti-blocking mechanism at least blocks the minimum caliber of the fluid jet flow channel.

According to an aspect of the utility model, it is preferred, the motion mode through the end cap realizes opening and closing of fluid jet runner, at least in the intercommunication department of feed liquor chamber and fluid jet runner, the bore of fluid jet runner is less than the bore of feed liquor chamber, prevent that stifled mechanism includes the end cap, when the nozzle is in operating condition, the end cap is located the feed liquor intracavity and makes the fluid jet runner open, when the nozzle is in non-operating condition, the end cap is at least partly stretched into the fluid jet runner and is blocked the fluid jet runner.

Preferably, to simplify the movement of the stopper, the stopper moves linearly.

According to the utility model discloses an aspect, the end cap passes through the elastic component drive, prevent that stifled mechanism is still including the first elastic component that is located the feed liquor intracavity, the both ends of first elastic component are connected between feed liquor chamber outside wall and end cap for thereby the end cap keeps removing the trend of stifled fluid injection runner in to the fluid injection runner.

Preferably, in order to facilitate the arrangement of the first elastic member, one end of the first elastic member is connected to the end of the nozzle body, which is located at the periphery of the liquid inlet cavity and far away from the fluid injection flow channel, and the other end of the first elastic member is connected to the end of the plug, which is far away from the fluid injection flow channel.

Preferably, in order to define the motion trail of the plug, the end of the plug facing the first elastic element is provided with an end plate, the size of the end plate is matched with that of the cavity of the liquid inlet cavity, and the end plate moves along the wall surface of the nozzle body at the periphery of the liquid inlet cavity.

According to the utility model discloses a another aspect, the end cap passes through the electro-magnet drive, prevent that stifled mechanism is still including setting up the electro-magnet in the feed liquor intracavity, when the nozzle is in operating condition, the electro-magnet can actuation end cap make the end cap be located the feed liquor intracavity, when the nozzle is in unoperated state, the electro-magnet can reject the end cap and make the end cap stretch into in the fluid jet runner.

In order to facilitate the electromagnet to drive the plug, the electromagnet is arranged at the end part of the liquid inlet cavity far away from the fluid injection flow channel, and the end part of the plug facing the electromagnet is provided with a fixed magnetic pole.

Preferably, in order to define the movement track of the plug, the anti-blocking mechanism further includes a first slide and a second slide which are arranged at intervals along the movement direction of the plug, the second slide is closer to the fluid injection flow passage relative to the first slide, and the plug passes through the first slide and the second slide and can move along the first slide and the second slide.

More preferably, for ensuring the second slide sets up the connected position at feed liquor chamber and fluid injection runner, the second slide is at least partly located the fluid injection runner, the part that the second slide is located the fluid injection runner is pasted the wall that nozzle body is located the fluid injection runner periphery tightly, end cap shutoff second slide is located the part of fluid injection runner.

In order to facilitate anti-blocking in the auxiliary fluid injection flow channel, the nozzle body is provided with an induction coil corresponding to the periphery of the fluid injection flow channel, so that the fluidity of the fluid can be increased in a heating mode.

According to another aspect of the utility model, the end cap passes through the electric mechanism drive, the feed liquor chamber is including the first cavity and the second cavity that the angle set up, first cavity and fluid injection runner are adjacent and extend with the ground, the end cap passes through the drive of sharp drive module and rectilinear movement, the fluid gets into from the second cavity.

In order to avoid the external environment pollution of the linear driving module caused by the nozzle, part of the linear driving module is positioned outside the nozzle body, and a protective cover is arranged outside the part of the linear driving module.

In order to avoid leakage of fluid when the plug moves in the first cavity, an annular sealing ring is arranged on the periphery of the plug, and the shape and the size of the sealing ring are matched with those of the first cavity.

According to the utility model discloses a further aspect, prevent that stifled mechanism includes the separation blade, the separation blade has at least two, when the nozzle is in operating condition, the separation blade is kept away from each other and is made the fluid jet runner open, when the nozzle is in non-operating condition, the separation blade contradicts each other and blocks up the fluid jet runner, the separation blade keeps the trend of contradicting each other.

In order to avoid the blocking of the fluid flow by the blocking piece and the leakage of the fluid injection flow passage, the blocking piece at least partially penetrates through the peripheral wall of the nozzle body, which is positioned at the periphery of the fluid injection flow passage, from the outside of the fluid injection flow passage, and the blocking piece blocks the peripheral wall of the nozzle body, which is positioned at the periphery of the fluid injection flow passage.

In order to facilitate the movement of the baffle plate, the anti-blocking mechanism further comprises a second elastic part, and two ends of the second elastic part are respectively connected between one end of the baffle plate, far away from the fluid jet flow channel, and the corresponding inner side wall of the nozzle body, so that the baffle plate keeps the trend of mutual interference of the baffle plate moving in the fluid jet flow channel.

In order to facilitate the movement of the flaps away from each other against the force of the elastic member during the fluid flow, each flap extends in a direction gradually inclined from one end away from each other to one end close to each other along the fluid flow path from upstream to downstream.

Preferably, the nozzle is a cavitation nozzle, the liquid inlet cavity is a resonant cavity for self-oscillation of the entering fluid, the fluid jet flow channel comprises a pressurizing cavity and an outward-expanding cavity, the pressurizing cavity is positioned between the resonant cavity and the outward-expanding cavity, the caliber of the pressurizing cavity is smaller than that of the resonant cavity, and the caliber of the outward-expanding cavity is gradually increased from the communication position with the pressurizing cavity to the direction far away from the pressurizing cavity to form a bell mouth, so that the cavitation jet type nozzle is formed; the anti-blocking mechanism can open and block the pressurizing cavity.

According to the utility model discloses a another aspect, the end cap passes through hydraulic drive, the feed liquor chamber is separated for the first cavity that is close to the fluid injection runner and the second cavity of keeping away from the fluid injection runner, keeps apart through the baffle between two cavities, first cavity and fluid injection runner fluid intercommunication, the second cavity then not with first cavity and fluid injection runner fluid intercommunication, first cavity and second cavity are connected to outside fluid source respectively, the baffle can move under fluidic pressure to change the size of first cavity and second cavity, the end cap is located first cavity and is connected fixedly and can synchronous motion with the baffle.

The utility model provides a technical scheme that above-mentioned second technical problem adopted is: a cleaning mechanism, characterized by: the fluid is a cleaning medium using the nozzle as described above.

In order to supply the cleaning medium to the liquid inlet cavity, the cleaning mechanism further comprises a liquid storage container for storing the cleaning medium, the cleaning medium in the liquid storage container is respectively communicated with the first chamber through a first conduit and the second chamber through a second conduit, the first conduit is provided with a first valve for controlling the first conduit to be communicated and closed, and the second conduit is provided with a second valve for controlling the second conduit to be communicated and closed.

To facilitate control of the second valve during operation of the nozzle, the second conduit is also provided with a flow meter for sensing fluid flow through the second conduit to control the second valve.

To facilitate control of the second valve when the nozzle is not in operation, the second conduit is also provided with a pressure sensor for sensing the pressure of the fluid passing through the second conduit to control the second valve.

The utility model provides a technical scheme that above-mentioned third technical problem adopted does: a range hood, its characterized in that: a cleaning mechanism as described above is applied.

Preferably, the range hood comprises a fan system, and the cleaning mechanism is used for cleaning the fan system.

Compared with the prior art, the utility model has the advantages of: when the nozzle is in a non-working state, the minimum caliber of the fluid jet flow channel is blocked, the nozzle can be protected, the influence on use caused by the blockage of the nozzle is avoided, and the anti-blocking mechanism is located in the nozzle and is prevented from being polluted and losing efficacy.

Drawings

FIG. 1 is a schematic view of a cleaning apparatus of the present invention;

FIG. 2 is a schematic view of a cleaning medium supply pipe of the cleaning apparatus of the present invention;

fig. 3 is a sectional view showing an operation state of a nozzle according to a first embodiment of the present invention;

FIG. 4 is a sectional view of a first embodiment of the nozzle of the present invention in a non-operating state;

FIG. 5 is a sectional view of a second embodiment of the nozzle of the present invention in an operating state;

FIG. 6 is a cross-sectional view of a second embodiment of the nozzle of the present invention in an inoperative condition;

FIG. 7 is a sectional view of a third embodiment of the present invention showing the nozzle connected to a water source;

FIG. 8 is a cross-sectional view of a third embodiment of the present invention, showing the nozzle in a non-operative position connected to a water supply;

fig. 9 is a sectional view showing an operation state of a nozzle according to a fourth embodiment of the present invention;

FIG. 10 is a sectional view of a fourth embodiment of a nozzle of the present invention in a non-operating state;

fig. 11 is a sectional view showing an operation state of a nozzle according to a fifth embodiment of the present invention;

fig. 12 is a sectional view of a fifth embodiment of the nozzle of the present invention in a non-operating 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," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships illustrated in the drawings, which are based on the orientation or positional relationship shown in the drawings, and are intended to facilitate the description of the invention and to simplify the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention can be positioned in different orientations, these directional terms are intended to be illustrative and not to be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 and 2, a cleaning device includes a fan system 1 and a cleaning mechanism 2, where the fan system 1 is a centrifugal fan and is applied to a range hood in this embodiment, alternatively, the fan system 1 may also be applied to any other occasions requiring such a power device.

The fan system 1 includes a volute 11 and an impeller 12 disposed in the volute 11, the volute 11 includes two cover plates 111 (only one of the cover plates 111 can be seen in the figure, and the other cover plate is disposed approximately parallel thereto) arranged at intervals, and an annular wall 112 located between the two cover plates 111, and an air inlet 113 is opened on the cover plate 111. The structure of the fan system 1 is the same as that of the prior art, and is not described herein again.

The cleaning mechanism 2 is disposed outside the volute casing 11 and includes a cleaning medium supply pipe 21, and a nozzle 22 is disposed at an end of the cleaning medium supply pipe 21 (an end facing into the volute casing 11). The cleaning medium can be water, steam or cleaning agent and other fluids.

Example one

Referring to fig. 3 and 4, a cross-sectional view of the nozzle 22 is shown. The nozzle 22 is a cavitation jet nozzle, and includes a cylindrical nozzle body 221, in which a resonant cavity 222 is formed as a liquid inlet cavity, and a liquid inlet 223 is formed on the circumferential wall of the nozzle body 221 at a position corresponding to the resonant cavity 222, so that the resonant cavity 222 can be in fluid communication with an external cleaning medium source. Preferably, the liquid inlet 223 may have a ring shape, and the cleaning medium uniformly enters the resonant cavity 222 and is self-vibrated in the resonant cavity 222. The direction of flow of the cleaning medium can be seen in fig. 3 by the arrows. Of course, the nozzle 22 may be used not only for cleaning, but also for other applications where it is desired to eject a fluid.

The nozzle body 221 is further formed with a pressure increasing cavity 224 and an outward expanding cavity 225, the resonant cavity 222, the pressure increasing cavity 224 and the outward expanding cavity 225 are sequentially in fluid communication, the pressure increasing cavity 224 and the outward expanding cavity 225 form a fluid injection flow channel, and on a flow path of the fluid, the liquid inlet cavity is located at the upstream of the fluid injection flow channel. Between the resonance chamber 222 and the flaring chamber 225, a plenum chamber 224 is located, in this embodiment the nozzle body 221 is cylindrical, and the three chambers are arranged one after the other on the axis of the nozzle body 221, extending in the same direction. At least at the connection position of the liquid inlet cavity and the fluid jet flow channel, the aperture of the fluid jet flow channel is smaller than that of the liquid inlet cavity, the aperture of the pressurizing cavity 224 is smaller than that of the resonant cavity 222, in this embodiment, the fluid jet flow channel is cylindrical, the outward expanding cavity 225 is used as an outward expanding section of the negative pressure region, and the aperture of the outward expanding cavity is gradually increased from the connection position with the pressurizing cavity 224 to the direction far away from the pressurizing cavity 224 to form a bell mouth. Thus, the pressurizing chamber 224 is a region having the smallest diameter in the fluid ejection flow path, and the diameter thereof is approximately in the range of 0.6 to 1.2 mm. Because the nozzle 22 is located inside the range hood for a long time, the harsh oil smoke environment is likely to cause oil smoke to cross the nozzle 22, the oil smoke is more and more accumulated due to viscosity, the fluid injection flow passage of the nozzle 22, especially the pressurization cavity 224 is gradually blocked, and finally the cleaning mechanism 2 is disabled, and if the water pressure inside the cleaning mechanism is too high, danger is likely to occur. Further, if the cleaning medium is hot water, which is likely to deposit scale, the nozzle 22 is particularly likely to be clogged with scale, and therefore it is necessary to prevent scale from gradually depositing in the fluid ejection flow path, particularly, in the pressurizing chamber 224.

For this reason, the nozzle 22 of the present invention is provided with an anti-clogging mechanism. In this embodiment, the anti-blocking mechanism includes a plug 226 and a first elastic member 227, the plug 226 is shaped and sized to fit the pressurizing cavity 224, a needle-shaped plug is used, and the first elastic member 227 is preferably a spring, and is located in the resonant cavity 222 and connected between the outer wall surface of the resonant cavity 222 and the plug 226, so that the plug 226 keeps moving into the pressurizing cavity 224 to block the pressurizing cavity 224. In this embodiment, the plug 226 is disposed along the axis of the nozzle body 221, and one end of the first elastic member 227 is connected to the end of the nozzle body 221, which is located at the periphery of the resonant cavity 222 and away from the pressurizing cavity 224, and the other end is connected to the end of the plug 226, which is located at the periphery of the pressurizing cavity 224.

In order to define the movement track of the plug 226, the end of the plug 226 facing the first elastic member 227 is provided with an end plate 2261, and the size of the end plate 2261 is adapted to the size of the cavity of the resonant cavity 222, so that the end plate 2261 can move against the inner side wall of the nozzle body 221 outside the resonant cavity 222 to ensure the linear movement of the plug 226.

When no cleaning medium is introduced from the liquid inlet 223, referring to fig. 4, the stopper 226 is under the elastic force of the first elastic member 227 and extends into the pumping chamber 224, so as to block the pumping chamber 224, i.e., the fluid injection flow passage. When the cleaning mechanism 2 is started, the cleaning medium rushes into the resonant cavity 222 of the nozzle 22 through the position of the liquid inlet 223 under the action of pressure, since the resonant cavity 222 in the nozzle 22 is sealed at this time, the pressure of the resonant cavity 222 in the nozzle 22 gradually increases with the increase of the fluid flow, and when the pressure in the resonant cavity 222 of the nozzle 22 is greater than the elastic force of the first elastic member 227, under the push of the fluid pressure, the first elastic member 227 is gradually compressed, so that the plug 226 is pulled to gradually exit from the position of the pressurization cavity 224, see fig. 3, so that the liquid inlet cavity in the whole nozzle 22 is communicated with the fluid injection flow channel, and the cleaning medium can be ejected from the pressure expansion cavity 225 to perform the cleaning operation.

Therefore, the nozzle 22 is timely plugged after the cleaning procedure is finished every time, and the scale layer is prevented from being gradually deposited at the position of the minimum aperture.

Example two

Referring to fig. 5 and 6, the present embodiment is different from the first embodiment in that the first elastic member 227 is not provided to drive the plug 226 to move.

A first slide way 228 is arranged in the resonant cavity 222, a second slide way 229 is arranged at the communication position of the resonant cavity 222 and the pressurizing cavity 224, the second slide way 229 can be partially positioned in the resonant cavity 222 and partially positioned in the pressurizing cavity 224 or can be completely positioned in the pressurizing cavity 224, and the part of the second slide way 229 positioned in the pressurizing cavity 224 is close to the wall surface of the nozzle body 221 positioned on the periphery of the pressurizing cavity 224. The first and

second ramps

228, 229 each extend along the axis of the nozzle body 221. Plug 226 passes through and is movable along first and

second slides

228, 229, and movement of plug 226 is guided by first and

second slides

228, 229. The plug 226 is shaped and dimensioned to fit over the second slideway 229 so as to close off the second slideway 229.

An electromagnet 230 is also fixedly arranged in the nozzle body 221, in this embodiment, the electromagnet 230 is arranged at the end part far away from the pressurizing cavity 224 in the resonant cavity 222, the end part of the plug 226 facing the electromagnet 230 is made of a magnetic body with a fixed magnetic pole, and the rest part of the plug 226 can be made of a ferrous material.

Referring to fig. 6, in the non-operating state, the plug 226 penetrates at least partially into the second slideway 229 to close the second slideway 229 and thus the pressurizing cavity 224.

When the nozzle 22 needs to be opened for operation, if the end of the plug 226 facing the electromagnet 230 is the S pole, the electromagnet 230 is powered on, and the current direction of the coil inside the electromagnet 230 is controlled, so that the end of the electromagnet 230 facing the plug 226 is the N pole, and thus under the action of the electromagnet 230, the plug 226 moves towards the electromagnet 230 until completely exiting the second slide 229, see fig. 5, so that the cleaning medium can be ejected from the pressurizing cavity 224, and the nozzle 22 operates normally. After the cleaning is completed, the current direction of the electromagnet 230 is changed, so that the end of the electromagnet 230 facing the plug 226 is an S pole, and the plug 226 is pushed to move into the second slide channel 229 again for plugging by using the principle that like poles repel each other between the magnets, so as to prevent the plugging. When the end of the plug 226 facing the electromagnet 230 is N-pole, the current of the electromagnet 230 may be opposite to the above. The direction of flow of the cleaning medium can be seen in fig. 5 by the arrows.

The periphery of the nozzle body 221 corresponding to the fluid jet flow channel is provided with the induction coil 231, so that the nozzle 22 can be heated according to the working duration of the range hood and matched with the magnetic pole switching of the electromagnet 230, oil stains on the edge of the pressurization cavity 224 are dredged, and the service life is further prolonged.

EXAMPLE III

Referring to fig. 7 and 8, the present embodiment is different from the first embodiment in that the first elastic member 227 is not provided, and the plug 226 is moved by the fluid pressure (e.g., water pressure) of the cleaning medium.

Resonant cavity 222 is divided into a first chamber 2221 adjacent to pumping cavity 224 and a second chamber 2222 remote from pumping cavity 224, separated by a partition 232, wherein first chamber 2221 is in fluid communication with pumping cavity 224 and second chamber 2222 is not in fluid communication with first chamber 2221 and pumping cavity 224, but partition 232 is movable along the axis of nozzle body 221 to vary the size of first chamber 2221 and second chamber 2222. The plug 226 is disposed in the first chamber 2221, and the end of the plug 226 remote from the pumping chamber 224 is fixedly connected to the partition 232 so as to be synchronously movable.

The cleaning mechanism 2 further comprises a reservoir 23 for storing a cleaning medium, the cleaning medium in the reservoir 23 being in fluid communication with the first chamber 2221 via a first conduit 233 and the second chamber 2222 via a second conduit 234, respectively, wherein the first conduit 233 is connectable to the inlet 223.

The first conduit 233 is provided with a first valve 235 for controlling the opening and closing of the first conduit 233, and the second conduit 234 is provided with a second valve 236 for controlling the opening and closing of the second conduit 234. A flow meter 237 and a pressure sensor 238 are also disposed on the second conduit 234, the flow meter 237 being configured to sense the flow of fluid through the second conduit 234, and the pressure sensor 238 being configured to sense the pressure of the fluid through the second conduit 234.

Referring to fig. 8, the nozzle 22 is in a non-operational state, the first valve 235 and the second valve 236 are in a closed state, and the plug 226 is at least partially disposed within the pumping chamber 224 to block the fluid injection path, wherein the second chamber 2222 is smaller than the first chamber 2221.

When the nozzle 22 needs to be operated, the first valve 235 and the second valve 236 are simultaneously activated, since the inlet pressures of the two solenoid valves are the same, and since the second chamber 2222 is smaller than the first chamber 2221, the area of the second chamber 2222 acted by the cleaning medium pressure is small, the partition 232 (together with the plug 226) is pushed away from the pressurizing chamber 224, and by detecting the flow rate of the reverse flow through the flow meter 237, when the preset value is reached, it is proved that the plug 226 has completely exited the pressurizing chamber 224, see fig. 7, and then the second valve 236 is closed, the second chamber 2222 is in the sealed state, the plug 226 will not move, and only the first valve 235 is turned on, and the water is ejected through the fluid ejection flow passage. The direction of flow of the cleaning medium can be seen in fig. 7 by the arrows.

When the cleaning procedure is finished, the first valve 235 is closed, the second valve 236 is opened, the cleaning medium will slowly fill the second chamber 2222, and push the plug 226 to move toward the pressurizing chamber 224, so as to gradually block the pressurizing chamber 224, when the end of the plug 226 away from the partition 232 reaches the limit position, the pressure in the second chamber 2222 will increase, and if the pressure value detected by the pressure sensor 238 reaches the preset threshold value, it indicates that the plug 226 has completely blocked the pressurizing chamber 224, and at this time, the second valve 236 will also be closed.

For automatic control, the first valve 235 and the second valve 236 may be solenoid valves.

Example four

Referring to fig. 9 and 10, the present embodiment is different from the fourth embodiment in that the first elastic member 227 is not provided to move the plug 226.

The nozzle 22 further comprises a motor 239 and a rack 240, wherein the motor 239 is disposed outside the nozzle body 221, a gear 2391 is disposed on an output end of the motor 239, and the rack 240 may partially extend out of the resonant cavity 222 to engage with the gear 2391.

First chamber 2221 ' and second chamber 2222 ' no longer extend completely in the same direction, and resonating cavity 222 is in a bent shape, such that first chamber 2221 ' and second chamber 222 are disposed at an angle to each other, and in this embodiment, first chamber 2221 ' and second chamber 2222 ' are perpendicular to each other and in an L-shape. Wherein the first chamber 2221' extends co-directionally adjacent to the plenum 224. The rack 240 moves in the first chamber 2221 ', and the liquid inlet 223 is opened at the end of the second chamber 2222 ' far from the first chamber 2221 '. The rack 240 may extend out of the nozzle body 221 from the end of the first chamber 2221' distal from the pumping cavity 224. Because the nozzle 22 is located inside the range hood, the environment is severe, and in order to prevent the rack 240 from being stained with oil stains and influencing the movement of the cleaning mechanism 2, a sealed protective cover 242 is arranged outside the whole module of the gear, the rack and the motor, so that the oil stains are prevented from entering the nozzle 22, and the mechanism movement failure is prevented.

Referring to fig. 10, when the nozzle 22 is not in operation, the choke plug 226 closes off the plenum 224.

When the nozzle 22 needs to be opened for operation, the motor 239 drives the rack 240 to move linearly, so that the plug 226 gradually leaves the pressurizing cavity 224, and an annular sealing ring 241 can be arranged on the outer periphery of the plug 226, wherein the shape and the size of the sealing ring 241 are matched with those of the first chamber 2221 ', so that the first chamber 2221' is blocked, and the cleaning medium is prevented from flowing out of a gap between the rack 240 and the inner wall of the resonant cavity 222. When the sealing ring 241 leaves the portion of the first chamber 2221 'between the second chamber 2222' and the pressurizing chamber 224, referring to fig. 9, the sealing ring 241 moves higher than the lower sidewall of the second chamber 2222 ', whereby the cleaning medium entering from the second chamber 2222' can enter the pressurizing chamber 224 without being blocked by the sealing ring 241, thereby performing cleaning. The direction of flow of the cleaning medium can be seen in fig. 9 by the arrows.

In this embodiment, a linear driving module is formed by a motor, a gear and a rack so as to drive the plug 226 to reciprocate linearly. Alternatively, other linear drive modules known in the art may be used, such as a combination of an electric push rod, a motor lead screw nut, etc.

EXAMPLE five

Referring to fig. 11 and 12, in the present embodiment, the difference from the first embodiment is that the blocking prevention mechanism is replaced with a blocking plate 243 and a second elastic member 244. The blocking pieces 243 are oppositely arranged, and each blocking piece 243 corresponds to one second elastic member 244. A baffle 243 is provided at a corresponding position of the pressurizing chamber 224 at least partially across the peripheral wall of the nozzle body 221 at the outer periphery of the pressurizing chamber 224. The second elastic member 244 is preferably a spring, and both ends thereof are connected between one end of the baffle 243 away from the pressurizing chamber 224 and the corresponding inner side wall of the nozzle body 221 (the position of the nozzle body 221 corresponding to the pressurizing chamber 224 has a certain wall thickness to facilitate the arrangement of the second elastic member 244), so that the baffle 243 keeps a tendency to move toward the pressurizing chamber 224 to interfere with each other. Alternatively, the flaps 243 may be more than two, and arranged along the circumferential direction of the pressurizing chamber 224.

Along the cleaning medium flow path, each of the baffle plates 243 extends from one end away from each other to one end close to each other gradually from the upstream side to the downstream side toward the cleaning medium.

Referring to fig. 12, when the nozzle 22 is in the non-operating state, the flaps 243 are mostly inserted into the pressure increasing chamber 224 (the blocking nozzle body 221 is located on the peripheral wall of the outer periphery of the pressure increasing chamber 224), and the two flaps 243 interfere with each other, thereby blocking the pressure increasing chamber 224.

When the nozzle 22 needs to be opened, due to the inclined design of the blocking pieces 243, when the cleaning medium enters the pressurizing cavity 224, pressure can be applied to the blocking pieces 243 to move the blocking pieces 243 away from each other, so as to open the pressurizing cavity 224, and at this time, the blocking pieces 243 block the peripheral wall of the nozzle body 221, which is located on the periphery of the pressurizing cavity 224, so as to avoid pressure relief, as shown in fig. 11.

In the above embodiments, the nozzles 22 are illustrated as cavitation nozzles, and the above-described anti-blocking mechanism can be applied to other nozzles, so that the plug 226 or the flap 243 can block and open the flow path of the fluid jet. Furthermore, the nozzle 22 may be used not only for cleaning the fan system 1, but also for any other component or machine or the like that requires spray cleaning. Alternatively, the nozzle 22 may be used not only for cleaning devices, but also for other applications requiring fluid other than fluid media, such as injection molding.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims

1. A nozzle comprising a nozzle body (221), a liquid inlet chamber into which a fluid enters and a fluid ejection flow path through which the fluid is ejected being formed in the nozzle body (221), the liquid inlet chamber being located upstream of the fluid ejection flow path on a flow path of the fluid, characterized in that: the nozzle also comprises an anti-blocking mechanism arranged in the nozzle body (221), when the nozzle is in a working state, the fluid jet flow channel is opened, and when the nozzle is in a non-working state, the anti-blocking mechanism at least blocks the minimum caliber position of the fluid jet flow channel.

2. The nozzle of claim 1, wherein: at least at the communicating position of the liquid inlet cavity and the fluid injection flow channel, the caliber of the fluid injection flow channel is smaller than that of the liquid inlet cavity, the anti-blocking mechanism comprises a plug (226), when the nozzle is in a working state, the plug (226) is positioned in the liquid inlet cavity to open the fluid injection flow channel, and when the nozzle is in a non-working state, at least part of the plug (226) extends into the fluid injection flow channel to block the fluid injection flow channel.

3. The nozzle of claim 2, wherein: the plug (226) moves linearly.

4. The nozzle of claim 3, wherein: the anti-blocking mechanism further comprises a first elastic piece (227) located in the liquid inlet cavity, and two ends of the first elastic piece (227) are connected between the outer side wall face of the liquid inlet cavity and the plug (226), so that the plug (226) keeps moving towards the fluid injection flow channel to block the trend of the fluid injection flow channel.

5. The nozzle of claim 4, wherein: one end of the first elastic piece (227) is connected with the end, located on the periphery of the liquid inlet cavity, of the nozzle body (221) and far away from the fluid injection flow channel, and the other end of the first elastic piece (227) is connected with the end, far away from the fluid injection flow channel, of the plug (226).

6. The nozzle of claim 5, wherein: the end part, facing the first elastic piece (227), of the plug (226) is provided with an end plate (2261), the size of the end plate (2261) is matched with the size of a cavity of the liquid inlet cavity, and the end plate (2261) moves along the wall surface, located on the periphery of the liquid inlet cavity, of the nozzle body (221).

7. The nozzle of claim 3, wherein: the anti-blocking mechanism further comprises an electromagnet (230) arranged in the liquid inlet cavity, when the nozzle is in a working state, the electromagnet (230) can attract the plug (226) to enable the plug (226) to be located in the liquid inlet cavity, and when the nozzle is in a non-working state, the electromagnet (230) can repel the plug (226) to enable the plug (226) to stretch into the fluid jet flow channel.

8. The nozzle of claim 7, wherein: the electromagnet (230) is arranged at the end part of the liquid inlet cavity far away from the fluid injection flow channel, and the end part of the choke plug (226) facing to the electromagnet (230) is provided with a fixed magnetic pole.

9. The nozzle of claim 7, wherein: the anti-blocking mechanism further comprises a first slide way (228) and a second slide way (229) which are arranged at intervals along the movement direction of the plug (226), the second slide way (229) is closer to the fluid injection flow channel relative to the first slide way (228), and the plug (226) passes through the first slide way (228) and the second slide way (229) and can move along the first slide way (228) and the second slide way (229).

10. The nozzle of claim 9, wherein: the second slide way (229) is arranged at a communication position of the liquid inlet cavity and the fluid injection flow channel, at least part of the second slide way (229) is positioned in the fluid injection flow channel, the part of the second slide way (229) positioned in the fluid injection flow channel is attached to the wall surface of the nozzle body (221) positioned at the periphery of the fluid injection flow channel, and the plug (226) plugs the part of the second slide way (229) positioned in the fluid injection flow channel.

11. The nozzle of claim 7, wherein: the nozzle body (221) is provided with an induction coil (231) corresponding to the periphery of the fluid jet flow channel.

12. The nozzle of claim 3, wherein: the liquid inlet cavity is divided into a first cavity (2221) close to the fluid injection flow passage and a second cavity (2222) far away from the fluid injection flow passage, the two cavities are separated by a partition plate (232), the first cavity (2221) is communicated with the fluid injection flow passage in a fluid mode, the second cavity (2222) is not communicated with the first cavity (2221) and the fluid injection flow passage in a fluid mode, the first cavity (2221) and the second cavity (2222) are respectively connected to an external fluid source, the partition plate (232) can move under the pressure of the fluid, the size of the first cavity (2221) and the size of the second cavity (2222) are changed, and the plug (226) is located in the first cavity (2221) and is fixedly connected with the partition plate (232) and can move synchronously.

13. The nozzle of claim 3, wherein: the liquid inlet cavity comprises a first cavity (2221 ') and a second cavity (2222') which are arranged at an angle, the first cavity (2221 ') and the fluid injection flow passage extend adjacently and in the same direction, the plug (226) is driven by the linear driving module to move linearly, and the fluid enters from the second cavity (2222').

14. The nozzle of claim 13, wherein: the partial linear driving module is positioned outside the nozzle body (221), and a protective cover (242) is arranged outside the partial linear driving module.

15. The nozzle of claim 14, wherein: an annular sealing ring (241) is arranged on the periphery of the plug (226), and the shape and the size of the sealing ring (241) are matched with those of the first cavity (2221').

16. The nozzle of claim 1, wherein: the anti-blocking mechanism comprises at least two blocking sheets (243), the blocking sheets (243) are provided with at least two, when the nozzle is in an operating state, the blocking sheets (243) are far away from each other to enable the fluid injection flow passage to be opened, when the nozzle is in a non-operating state, the blocking sheets (243) are mutually abutted to block the fluid injection flow passage, and the blocking sheets (243) keep mutually abutted trends.

17. The nozzle of claim 16, wherein: the baffle plate (243) at least partially penetrates through the peripheral wall of the nozzle body (221) from the outside of the fluid injection flow channel and is positioned on the periphery of the fluid injection flow channel, and the baffle plate (243) blocks the peripheral wall of the nozzle body (221) positioned on the periphery of the fluid injection flow channel.

18. The nozzle of claim 17, wherein: the anti-blocking mechanism further comprises a second elastic member (244), and two ends of the second elastic member (244) are respectively connected between one end, away from the fluid injection flow channel, of the blocking piece (243) and the corresponding inner side wall of the nozzle body (221), so that the blocking piece (243) keeps the tendency of moving towards the fluid injection flow channel and interfering with each other.

19. The nozzle of claim 18, wherein: each baffle plate (243) gradually extends from one end far away from each other to one end close to each other from the upstream to the downstream along the fluid flow path.

20. The nozzle of claim 3, wherein: the liquid inlet cavity is divided into a first cavity (2221) close to the fluid injection flow passage and a second cavity (2222) far away from the fluid injection flow passage, the two cavities are separated by a partition plate (232), the first cavity (2221) is communicated with the fluid injection flow passage in a fluid mode, the second cavity (2222) is not communicated with the first cavity (2221) and the fluid injection flow passage in a fluid mode, the first cavity (2221) and the second cavity (2222) are respectively connected to an external fluid source, the partition plate (232) can move under the pressure of the fluid, the size of the first cavity (2221) and the size of the second cavity (2222) are changed, and the plug (226) is located in the first cavity (2221) and is fixedly connected with the partition plate (232) and can move synchronously.

21. The nozzle of any one of claims 1 to 20, wherein: the liquid inlet cavity is a resonant cavity (222) for self-vibration of entering fluid, the fluid jet flow channel comprises a booster cavity (224) and an outer expanding cavity (225), the booster cavity (224) is positioned between the resonant cavity (222) and the outer expanding cavity (225), the caliber of the booster cavity (224) is smaller than that of the resonant cavity (222), and the caliber of the outer expanding cavity (225) is gradually increased from the communication position with the booster cavity (224) to the direction far away from the booster cavity (224) to form a horn mouth, so that a cavitation jet type nozzle is formed; the anti-blocking mechanism is capable of opening and blocking the pressurizing cavity (224).

22. A cleaning mechanism, characterized by: use of a nozzle according to any one of claims 1 to 11 and 13 to 21, the fluid being a cleaning medium.

23. A cleaning mechanism, characterized by: use of a nozzle according to claim 12, the fluid being a cleaning medium.

24. The cleaning mechanism of claim 23, wherein: the cleaning mechanism further comprises a liquid storage container (23) used for storing cleaning media, the cleaning media in the liquid storage container (23) are respectively communicated with the first chamber (2221) through a first conduit (233) and the second chamber (2222) through a second conduit (234), a first valve (235) used for controlling the first conduit (233) to be communicated and closed is arranged on the first conduit (233), and a second valve (236) used for controlling the second conduit (234) to be communicated and closed is arranged on the second conduit (234).

25. The cleaning mechanism of claim 24, wherein: the second conduit (234) is also provided with a flow meter (237) for sensing fluid flow through the second conduit (234) to control the second valve (236).

26. The cleaning mechanism of claim 24, wherein: a pressure sensor (238) is also provided on the second conduit (234) for sensing the pressure of the fluid passing through the second conduit (234) to control the second valve (236).

27. A range hood, its characterized in that: use of a cleaning mechanism according to any one of claims 22 to 26.

28. The range hood of claim 27, wherein: the range hood comprises a fan system (1), and the cleaning mechanism is used for cleaning the fan system (1).