CN116105208B - Fume exhauster - Google Patents

Abstract

The disclosure relates to the technical field of kitchen appliances, and relates to a range hood. The range hood comprises a shell, wherein an air duct and an air outlet area are arranged in the shell, and the air duct is used for sucking smoke from an air inlet of the range hood and guiding the smoke to the air outlet area from an air outlet of the range hood; the air duct is internally provided with a steam cleaning device, the steam cleaning device is used for discharging steam into the air duct, and finally the steam enters the air outlet area from the air outlet and is discharged. According to the range hood disclosed by the embodiment of the disclosure, the cleaning of the range hood on the suction and discharge paths is realized by the steam cleaning device arranged in the air duct and only one device, so that the cleaning effect is good.

Description

Fume exhauster

Technical Field

The embodiment of the disclosure relates to the technical field of kitchen appliances, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen appliances in modern families. The fume exhaust fan sucks fume from the air inlet through the fan arranged in the fume exhaust fan, then the fume exhaust fan sends the fume exhaust fan into the fume collecting cavity from the air outlet, and the fume exhaust fan exhausts the fume to the outside.

When the traditional range hood is cleaned, the shell of the range hood is required to be disassembled manually, and the components accumulating oil stains such as a filter screen, a fan and the like are cleaned at high temperature; after cleaning, the components need to be assembled again. The manual cleaning process is tedious and inconvenient, and the cleaning effect is general because some space manpower cannot extend into the cleaning process.

Aiming at the problem, the existing range hood is additionally provided with a cleaning device. These cleaning devices are mainly used for cleaning fans, and for this reason they are often arranged in the area where the fans are located. Furthermore, these cleaning devices require the addition of a water tank to convert water into steam by a steam generator and then clean the water. The range hood with the cleaning device has the following problems: (1) The cleaning object is single, and other parts accumulating oil stains cannot be cleaned; (2) The water tank needs to be periodically replenished with water when the generator is needed to generate water vapor.

In addition, the existing range hood also provides a cleaning device provided with a cleaning smoke baffle plate, and the cleaning device is cleaned by utilizing a water spraying and scraping mode, and then sewage is collected by utilizing a sewage collecting box.

Although the prior art realizes the cleaning of the fan and the smoke baffle, the cleaning of other positions (mainly the positions where the smoke passes through, such as an air duct air inlet, an air duct air outlet and an air duct whole) is not fully involved. And the fan and the smoke baffle are cleaned by adopting different cleaning devices. If all the positions where oil stains are accumulated are to be cleaned, a plurality of cleaning devices are required to be arranged, obviously, a large amount of space inside the range hood is occupied, and each cleaning device needs to be maintained regularly, so that the cost of the range hood is greatly increased.

Disclosure of Invention

Embodiments of the present disclosure provide a range hood that aims to address one or more of the above problems, as well as other potential problems.

In order to achieve the above object, the following technical scheme is provided:

according to a first aspect of the present disclosure, there is provided a range hood, including a casing, in which an air duct and an air outlet area are provided, the air duct being configured to suck flue gas from an air inlet thereof and guide the flue gas from an air outlet thereof to the air outlet area; the air duct is internally provided with a steam cleaning device, the steam cleaning device is used for discharging steam into the air duct, and finally the steam enters the air outlet area from the air outlet and is discharged.

The air duct and the fan are arranged in the shell of the range hood, which is generally inconvenient to clean. According to the range hood disclosed by the embodiment of the disclosure, the cleaning of the range hood on the suction and discharge paths is realized by the steam cleaning device arranged in the air duct and only one device. The cleaning device can clean the position ranging from the air inlet to the air outlet of the air duct, and has good cleaning effect.

The embodiment of the disclosure adopts one steam cleaning device, so that a space for accommodating a plurality of cleaning devices is not required to be opened up at each position in the shell of the range hood. Meanwhile, only one steam device needs to be maintained in the use process.

In some embodiments, the steam cleaning device includes a housing, and a fan and a first drive disposed within the housing; when the steam comes from a steam source in the shell, the side wall of the shell is provided with an air outlet hole, the outer side of the shell is provided with a spray head communicated with the air outlet hole, and the spray head is used for spraying the steam into the air flue; or when the steam comes from a steam source outside the shell, the side wall of the shell is provided with an air inlet hole and an air outlet hole, the outer side of the shell is provided with a spray head communicated with the air outlet hole, and the spray head is used for spraying the steam into the air duct.

In some embodiments, the steam cleaning device further comprises a rotating mechanism disposed within the housing; the rotating mechanism is used for driving the spray head to rotate along the surface of the shell.

In some embodiments, the rotation mechanism comprises a second driver, a rack, a pinion; the gear is meshed with the rack; the second driver drives the gear to rotate, and then drives the spray head arranged on the rack to rotate along the surface of the shell.

In some embodiments, the shell is provided with at least a hollowed-out part on one side of the spray head to allow the spray head to extend to the outer side of the shell, and guide grooves are respectively arranged on two sides of the shell; the spray head is characterized in that two ends of the rack are respectively accommodated in the guide grooves on two sides of the shell, a tooth mouth surface of the rack is meshed with the gear, a spray head is mounted on a non-tooth mouth surface of the rack, and the gear drives the rack to move along the guide grooves.

In some embodiments, the shell is hollow integrally at one side of the nozzle and within the rotation range of the nozzle; the rack is a flexible rack, and the non-tooth mouth surface of the rack shields the hollow part of the shell.

In some embodiments, the guide slot is divided into a plurality of slot segments, and the starting end of each slot segment is provided with an opening at the slot wall.

In some embodiments, the channel walls of the channel section near the opening have arcuate guide structures.

In some embodiments, the rack is provided with stop means at both ends.

In some embodiments, the housing is provided with a limiting structure on a front side of the start end of the guide groove, and/or the housing is provided with a limiting structure on a rear side of the end of the guide groove, and the stop device is limited in the limiting structure after one end of the rack moves to the limiting structure.

In some embodiments, a first-stage filter screen is arranged at the air inlet of the air duct, and a second-stage filter screen is arranged at the air outlet of the air duct; or a filter screen is arranged at the air inlet of the air duct; or a filter screen is arranged at the air outlet of the air duct.

In some embodiments, a baffle is disposed at a front end of the air inlet of the air duct.

In some embodiments, the air duct is formed within a cavity between the housing and a functional appliance integrated within the housing.

In some embodiments, the steam cleaning device is disposed on a side wall of the air duct.

In some embodiments, the steam cleaning device is provided with one or two or more spray heads; when one spray head exists, the spray head is fixed on the steam cleaning device to spray steam towards the fixed angle in the air duct; or when two or more spray heads exist, each spray head is fixed on different positions of the steam cleaning device, and each spray head sprays steam towards the air duct at a fixed angle; or when one spray head exists, the spray head rotates relative to the steam cleaning device so as to spray steam towards a plurality of angles in the air duct.

In some embodiments, the air duct is formed within a cavity between the housing and a functional appliance integrated within the housing; the steam cleaning device is arranged on the side wall of the air duct, which is close to the functional electrical appliance; the functional electrical appliance is a functional electrical appliance with a steam function; the functional electric appliance generates steam which is sent into the air duct through the steam cleaning device.

In some embodiments, a side plate of the functional electrical appliance forming the side wall of the air duct is used for installing the steam cleaning device, and the side plate is provided with an air outlet for generating steam; the steam cleaning device is arranged on one surface of the side plate, and the air inlet hole is formed in one surface of the side plate; the air outlet is communicated with the air inlet; or, the side plate of the side wall of the air duct formed by the functional electric appliance is used for installing the steam cleaning device, the side plate is provided with an air outlet, and the air outlet is also used as an air inlet hole of the steam cleaning device.

In some embodiments, the functional electrical appliance is integrated in the center of the casing, so that an air duct is formed on two sides of the range hood respectively; a steam cleaning device is arranged in each air duct.

Drawings

The above, as well as additional purposes, features, and advantages of embodiments of the present disclosure will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the accompanying drawings, several embodiments of the present disclosure are shown by way of example, and not by way of limitation.

Fig. 1 illustrates a schematic structural view of a range hood according to an embodiment of the present disclosure;

FIG. 2 shows a schematic structural view of a steam cleaning device according to an embodiment of the present disclosure; two arrow tracks are shown, one is the track of steam entering from the air inlet hole and then being sprayed out by the spray head at the air outlet hole, and the other is the track of the spray head rotating along the surface of the shell;

FIG. 3 shows a schematic structural view of a steam cleaning device according to another embodiment of the present disclosure;

FIG. 4 shows a schematic structural view of the rotary mechanism of FIG. 3;

FIG. 5 shows a schematic structural view of the housing of FIG. 3;

fig. 6 shows a schematic structural view of the rack in fig. 3;

FIG. 7 is a schematic view showing the structure of the rack in FIG. 3 mounted in the guide groove of the housing;

FIG. 8 illustrates a schematic diagram of a steam cleaning device for sucking and discharging steam from a functional appliance according to an embodiment of the present disclosure;

fig. 9 is a schematic view showing a structure in which a filter screen is installed to a range hood according to an embodiment of the present disclosure;

fig. 10 is a schematic view showing a mounting structure of the secondary filter screen of fig. 9 to be incorporated into a range hood;

FIG. 11 is a schematic view showing an assembled structure of the secondary screen of FIG. 9 installed in a socket structure;

FIG. 12 shows a front view of the drive mechanism of FIG. 1;

FIG. 13 shows a top view of the drive mechanism of FIG. 1;

fig. 14 is a schematic view showing a structure in which the driving mechanism drives the baffle to lift and lower in fig. 1.

10-casing, 11-button hand position, 12-opening, 20-functional electrical appliance, 30-wind channel, 31-air intake, 32-air outlet, 40-air outlet area, 50-baffle, 60-actuating mechanism, 61-driving gear, 62-driven gear, 63-driving rack, 64-connecting rod, 65-installing support, 66-driver, 71-primary filter screen, 72-secondary filter screen, 80-steam cleaning device, 81-casing, 811-inlet port, 812-outlet port, 813-guide slot, 8131-opening, 8132-arc guide structure, 82-fan, 83-first driver, 84-shower nozzle, 851-rack, 852-gear, 86-second driver, 87-stop device, 88-limit structure, 90-fan, 100-slot structure.

Like or corresponding reference characters indicate like or corresponding parts throughout the several views.

Detailed Description

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are illustrated in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "upper," "lower," "front," "rear," and the like, as used herein, refer to a place or position relationship based on the orientation or position relationship shown in the drawings, and are merely for convenience in describing the principles of the present disclosure, and do not refer to or imply that the elements referred to must have a particular orientation, be configured or operated in a particular orientation, and thus should not be construed as limiting the present disclosure.

The fume exhaust fan operates based on fluid dynamics principle and exhausts fume through the blower inside fume collecting cavity. When the fan impeller rotates, negative pressure suction is generated at the center of the fan, and the oil smoke is sucked into the fan and is collected by the smoke collecting cavity after being accelerated by the fan to be guided to be discharged out of the room.

The traditional range hood needs manual disassembly and cleaning when cleaning, wastes time and labor, has a general cleaning effect, and cannot be comprehensively cleaned within the range of a lampblack path.

To this, the prior art proposes to install a cleaning device on the range hood, but often the cleaning device can only clean the fan, and cannot clean the range of the range hood comprehensively.

Therefore, the embodiment of the disclosure provides a range hood, which completes the overall cleaning of the interior of the range hood within the range of a lampblack path by arranging a cleaning device in an air duct.

The following describes a range hood according to an embodiment of the present disclosure in detail with reference to the accompanying drawings. Fig. 1 shows a schematic structure of a range hood. Fig. 1 shows an integrated range hood with two air ducts 30. The disclosed embodiments are not limited to the number of air ducts 30 nor to an integrated range hood, but may be a conventional non-integrated range hood, as illustrated in fig. 1.

As shown in fig. 1, the range hood includes a housing 10. The range hood is internally integrated with a functional electric appliance 20, and the functional electric appliance can be a microwave oven, a steam box, a steam oven, a micro-steam oven, an oven, a dish washer, a sterilizing cabinet and the like. Two air channels 30 and an air outlet area 40 are arranged in the casing 10. The air outlet area 40 is generally a smoke collecting cavity, and can also be other structures for collecting and discharging smoke. The air outlet area is located downstream of the air outlet of the air duct, and a fan 90 is arranged in the air outlet area 40. Two air channels 30 are located on two sides of the casing 10, and each air channel 30 is arranged corresponding to one smoke generating area. When the fan works, the oil smoke enters the air duct from the air inlet 31, then enters the air outlet area 40 through the air outlet 32, and finally is discharged to the outside from the air outlet area 40.

The air duct 30 is internally provided with a steam cleaning device 80, and during cleaning, the steam cleaning device 80 is used for discharging steam into the air duct 30, and finally the steam enters the air outlet area 40 from the air outlet 32 and is discharged.

In the left duct 30 in the drawing, the steam cleaning device 80 sprays steam downward, and as the steam rises, the steam passes through the air outlet 32 in the direction of the arrow into the air outlet area 40. In the right duct 30 in the drawing, the steam cleaning device 80 sprays steam upward, and as the steam rises, the steam passes through the air outlet 32 in the arrow direction and enters the air outlet area 40. For the left air duct 30, the cleaning (including an air inlet, an air duct whole, an air outlet and a fan) of the whole oil smoke suction and discharge path can be completed. For the right side duct 30, it can accomplish cleaning of the duct from the local location of the duct (e.g., local location including air outlet, fan) to the air outlet area 40. Based on this, the direction of the steam cleaning device 80 can be set, and the nozzles can be set to spray at different angles in the air duct, so that the nozzles can spray at various positions in the air duct, or a single nozzle can spray at a fixed direction, or a single rotatable nozzle can spray at different angles in the air duct, so that the nozzles can spray at opposite, upper and lower positions, and even can spray on the air duct wall at the position where the nozzles are located, so that the positions in the air duct can be cleaned.

The steam cleaning device can be mounted on the air duct by means of a buckle, a screw, a rivet or an adhesive.

In one embodiment, as shown in fig. 2, the steam cleaning device includes a housing 81, and a fan 82 and a first driver 83 provided in the housing 81. In this embodiment, the fan 82 is utilized to accelerate the steam injection into the air duct 30. When the high-temperature steam blows to the air duct wall, the high-temperature steam dissolves the oil dirt on the air duct wall, and the dissolved oil dirt is discharged into the oil cup through the oil way. The first driver 83 is a motor, preferably a stepper motor, for driving the fan 82 to rotate. The fan 82 is preferably an axial fan. The fan 82 is mounted on the side wall of the housing 81 using a fan bracket.

In an example, the side wall of the housing 81 is provided with an air outlet 812, and a nozzle 84 that is communicated with the air outlet 812 is disposed at the outer side of the housing 81, and the nozzle 84 is used for injecting steam into the air duct 30. The steam is from a steam source within the housing 81. The steam source in this example may be a steam source comprising a water box and a steam generator, wherein the steam generator is used to convert water into steam, or a steam source comprising a refrigeration module and a heating module, wherein condensed water generated during operation of the refrigeration module is heated by the heating module to form steam.

In another example, when the steam comes from outside the housing 81, the sidewall of the housing 81 is further provided with an air inlet hole 811. Steam enters the housing 81 from outside the housing 81, and is then ejected into the air duct 30 through the nozzle 84. The steam source in this example may employ the steam source mentioned in the above example, and may also employ a steam source of a functional electric appliance integrated in the range hood. The functional electrical appliance is an electrical appliance with a steam function, such as a steam oven, a micro-steam oven, a disinfection cabinet with a steam disinfection function and the like.

When the steam source is a steam source of a functional electric appliance integrated in the range hood, an air outlet on the functional electric appliance is communicated with an air inlet hole of the steam cleaning device. For example, a pipe may be provided between the air outlet and the air inlet, or the air outlet and the air inlet may not be connected by a pipe (see fig. 8).

Referring to fig. 8, steam generated in the functional electric appliance 20 enters the steam cleaning device 80 and is then sprayed out through the spray head 84. The air duct 30 is formed by the outer side of the functional electric appliance 20 and the inner wall of the casing 10, the steam cleaning device 80 is installed on a side plate of the functional electric appliance 20 forming the side wall of the air duct, and an air outlet for generating steam is formed on the side plate.

The air inlet 811 may be formed in the housing 81 corresponding to the air outlet of the functional electric appliance 20, or may be used as the air inlet 811 of the steam cleaning device 80 directly without being formed in the housing 81. For this purpose, the former case is a case with a front cover and a cover plate, while the latter case has only a front cover.

When the housing 81 is a housing with a front cover and a cover plate, the cover plate and the side plate of the functional electric appliance 20 are arranged back to back, and in an example, no matter whether the air outlet and the air inlet are respectively arranged on the protruding part or the non-protruding part of the housing of the corresponding device, the surfaces of the air outlet and the air inlet are bonded; in another example, the air outlet and the air inlet are respectively arranged at the convex part of the shell of the corresponding device, and the convex part with the air outlet and the convex part with the air inlet are connected through a short sleeve; in another example, when the air outlet and the air inlet are provided in the protruding portion of the casing of the corresponding device, or when both are provided in the protruding portion of the casing of the corresponding device, the protruding portion with the air outlet and the protruding portion with the air inlet are designed to be mutually pluggable in size, i.e. the protruding portion with the air outlet can be sleeved in the protruding portion with the air inlet or the protruding portion with the air inlet can be sleeved in the protruding portion with the air outlet. Compared with the first example, the steam in the second and third examples is not easy to escape, and the steam sprayed out of the functional electric appliance can enter the air duct. Further, in the second and third examples, a sealing member may be disposed at the plugging portion, so as to avoid steam escaping at the plugging portion, and improve the utilization rate of steam sent into the air duct.

In the above example, the air outlet, the air inlet may be an open-cell structure, or a mesh structure having a plurality of open cells. When the air outlet and the air inlet hole can be of one open pore structure at the same time, the air outlet and the air inlet hole can be of different open pore structures. When plugged in the third exemplary mode, one or both of the air outlet and the air inlet are designed to be an open-pore structure.

When the housing 81 has only a front cover, the side plate of the functional electric appliance 20 is also a cover plate of the housing 81, and an air outlet on the cover plate can also be used as an air inlet hole 811 of the steam cleaning device. The air outlet is used not only for leading out the steam generated by the functional electric appliance 20 to the functional electric appliance 20, but also for feeding the led-out steam into the steam cleaning device 80.

In this example, the steam of the functional electric appliance can be reused. For example, a steam box typically dissipates heat by exhausting steam into the air. The example can directly utilize the steam generated by the functional electric appliance to dissipate heat without specially installing a steam source for generating steam, and the steam is recycled and then discharged into the air. In particular, some steam boxes adopt a positive discharge mode when exhausting, so that not only is steam scalded in wind direction, but also the kitchen temperature can be increased, and the steam boxes are heavy and stuffy especially in summer. The example can discharge the steam generated by the functional electric appliance from the air outlet area to the outside, and the kitchen temperature can be reduced to a certain extent.

The spray head may be provided in 1 or 2 or more. For example, when a plurality of spray heads are arranged, the spray heads can be fixedly arranged on the shell, and different spray heads face different positions of the air duct. For another example, when a spray head is provided, the spray head may be fixedly mounted on the housing, and the spray head may be provided in a particular direction, preferably in a direction. For another example, when a nozzle is provided, the nozzle may be mounted on a housing, and a rotation mechanism is provided on the housing so that the nozzle can rotate along the surface of the housing, thereby achieving multi-angle ejection.

In order to further improve the steam injection flow rate and pressure, the spray head can be designed to be flat, and accumulated oil dirt can be cleaned more forcefully while the steam can be injected through the spray head.

Further, embodiments of the present disclosure further describe a steam cleaning device capable of showerhead rotation. In this embodiment, as shown in fig. 3, the steam cleaning device 80 further includes a rotation mechanism 85 inside the housing 81. The steam cleaning device includes a housing 81, a fan 82 provided in the housing 81, a first driver 83, and a rotation mechanism 85. The rotation mechanism 85 is used to control the rotation of the spray head 84 along the surface of the housing 81 (see the rotation locus of the spray head 84 in fig. 2). In this embodiment, the fan 82 is used to accelerate the steam injection into the air duct 30, and the rotating mechanism is used to control the nozzle 84 to rotate at multiple angles, so as to realize the cleaning of the air duct 30 by injecting at multiple angles. When the high-temperature steam blows to the air duct wall, the high-temperature steam dissolves the oil dirt on the air duct wall, and the dissolved oil dirt is discharged into the oil cup through the oil way. The first driver 83 is a motor, preferably a stepper motor, for driving the fan 82 to rotate. The fan 82 is preferably an axial fan.

The rotating mechanism can adopt a driver and a transmission structure to realize the rotation of the spray head. For example, the rotation mechanism includes a second driver, a rack, and a pinion. The second driver is a motor, preferably a stepper motor. The gear is meshed with the rack. The second driver drives the gear to rotate, and then drives the spray head arranged on the rack to rotate along the surface of the shell.

The shell is provided with at least a hollowed-out part on one side of the spray head, which allows the spray head to extend to the outer side of the shell, and guide grooves are respectively arranged on two sides of the shell. The spray head is characterized in that two ends of the rack are respectively accommodated in the guide grooves on two sides of the shell, a tooth mouth surface of the rack is meshed with the gear, a spray head is mounted on a non-tooth mouth surface of the rack, and the gear drives the rack to move along the guide grooves.

In an example, a channel is formed in the shell and is formed along the surface of the shell, the channel is a hollowed-out portion, and the rack can rotate on the surface of the shell along the channel. When one surface of the shell, on which the spray head is mounted, is a plane, the channel is a vertical channel, corresponding vertical guide grooves are formed in two sides of the shell, the rack moves up and down in the vertical direction, the spray head also moves in the vertical direction, and at the moment, the rack can be a rigid rack or a flexible rack. When the side of the shell, on which the spray head is arranged, is an arc-shaped surface, the channels are arranged along the arc-shaped surface, correspondingly, guide grooves in the shape of the side, on which the spray head is arranged, of the shell are formed in two sides of the shell, at least part of the guide grooves are arc-shaped guide grooves, and at the moment, the racks are preferably flexible racks. When the gear rotates, the rack is driven to rotate along the inner surface of the shell, and then the spray head connected to the rack is driven to rotate along the outer surface of the shell.

In another example, the housing is provided with an opening for the nozzle to extend out, and the opening is a hollowed-out part. In this example, the housing on its side on which the spray head is arranged is designed as a housing which can rotate with the rack. For example, the cover is set into a plurality of pieces, the first piece is connected with the rack, the head end of the first piece is a free end, the tail end of the last piece is fixedly connected with the shell, the adjacent pieces are hinged through the connecting piece, when the rack drives the first piece to move along the track of the cover arranged on the shell, the plurality of pieces of overlapped cover can be unfolded until the first piece moves to the uppermost end or the lowermost end, the plurality of pieces are converted from a state of being all overlapped into a whole piece, then the rack reversely rotates, and the cover connected into the whole piece is slowly opened until all pieces are overlapped. In this example, when the cover is connected in one piece, the steam is sprayed by the spray head, and during other rotations, the steam can be sprayed by using the uncovered part of the cover as an opening in addition to being sprayed by the spray head. In this example, the housing may be a planar housing or an arcuate housing, and accordingly, the guide slot may be provided as a vertical guide slot, the housing rail may be provided as a vertical guide slot, the guide slot may also be provided as an arcuate guide slot, and the housing rail may be provided as an arcuate guide slot. Furthermore, the guide groove and the housing rail may be provided separately or may be provided as one, and guide the movement of the rack and the housing. When an arcuate channel is used, the rack is preferably a flexible rack. When a vertical guide channel is used, the rack may be a rigid rack or a flexible rack.

In another example, as shown in fig. 3 to 7, the housing 81 is hollowed out integrally on one side of the nozzle 84 within the rotation range of the nozzle, and guide grooves 813 are respectively provided on two sides of the hollowed-out portion of the housing 81. The rack 851 is a flexible rack, two ends of the rack 851 are respectively accommodated in the guide grooves 813 on two sides of the housing 81, a tooth mouth of the rack 851 faces toward the inner side of the housing 81, and the tooth mouth is meshed with the gear 852. The non-tooth surface of the rack 851 shields the hollowed-out portion of the housing 81, so that the nozzle 84 faces the outside of the housing 81. Fig. 6 shows that the rack 851 is a wide structure with a plurality of continuous teeth, and the size of the rack is large enough to cover the hollow portion of the housing 81.

When the whole side of the housing 81 on which the spray head 84 is mounted is an arc surface, the whole or part of the side of the housing 81 on which the spray head 84 is mounted is hollow. When the arc surface is formed on the side of the housing 81 where the spray head is mounted, the arc surface on the side of the housing 81 where the spray head 84 is mounted is hollowed out. The spray head 84 rotates in the hollow out position. The length of the guide groove 813 is longer than the length of the hollowed-out part of the shell 81. In the example of fig. 3 and 5, the side of the housing 81 on which the spray head 84 is mounted includes an arcuate surface and a flat surface.

Since the rack 851 has a relatively large size, in order to ensure that the rack 851 can rotate within the guide groove 813 as a whole without difference, two gears 852 may be provided, and the two gears 852 are provided on both sides of the rack 851 and correspond to the two guide grooves 813. The two gears 852 are connected by a shaft (not shown) to ensure synchronous rotation. The second drive 86 drives rotation of the shaft, which in turn drives rotation of the two gears 852. The synchronous rotation of the two gears 852 drives the rack 851 to move along the guide groove 813 of the housing 81, and the spray head 84 moves along with the movement of the rack 851.

To facilitate the insertion of the rack 851 into the guide 813, the guide 813 is designed with an opening. Specifically, as shown in fig. 7, the guiding groove 813 is divided into a plurality of groove segments according to different shapes of the housing 81, and for easy assembly and even blind insertion, a starting end of each groove segment is provided with an opening 8131 at a groove wall thereof. Thus, the opening may be utilized to prompt the operator that the current insertion portion is located at a section of the guide slot 813, and the rack 851 may be adaptively adjusted at each section opening, so that the rack 851 is smoothly installed in the guide slot 813. Further, the channel walls near the opening have arcuate guide structures 8132. The guide groove 813 can be conveniently guided in or out of the rack 851 by the arc-shaped guide structure 8132.

In order to avoid the continuous movement of the rack 851 toward one end along with the rotation of the gear 852, when the rack 851 at the other end is completely separated from the distal guide groove 813, the rack 851 cannot normally return to the other end along the guide groove 813 during the reverse rotation, and the two ends of the rack 851 are provided with the stop devices 87. As shown in fig. 4, two stop devices 87 are provided and are respectively disposed at two ends of the rack 851. The stop device 87 may be a block structure, which is used for sealing the end of the rack 851, the size of the block structure is larger than the thickness of the flexible rack 851 and larger than the width of the guide groove 813, and the block structure can prevent any end of the flexible rack 851 from separating from two ends of the guide groove 813, thereby affecting the forward and reverse movement of the rack 851 along the normal track. Meanwhile, the occurrence of stacking and winding of the racks 851 at one end of the guide groove 813 under the condition of continuous movement is avoided; especially when the machine is in fault, if the motor continuously rotates towards one direction, the rack 851 will always move towards the guide groove at one end, if the stop device 87 is not provided, the rack 851 will be coiled in the guide groove 813, even the rack 851 is damaged and can not be normally used, and the stop device 87 can just solve the problem, namely, even if the machine is in fault, the rack 851 can not generate the problem.

Further, when the groove bottom portions at both ends of the guide groove 813 are open, occurrence of uncontrollable movement distance of the rack 851 is prevented. On the one hand, the movement distance of the rack 851 in the guide groove 813 can be limited by controlling the rotation angle of the motor; on the other hand, the groove width of the guide groove 813 can be reduced so that the rack 851 cannot move continuously; on the other hand, the limit structure 88 may be designed near both ends of the guide groove, so that the baffle and the housing 81 may be used to form a bottom closed structure (for example, a bottom closed structure formed by an L-shaped baffle above the fan 82 in fig. 3 and an inner wall of the housing) or other bottom closed structures. After one end of the rack 851 moves to the limiting structure 88, the stopping device 87 is limited in the limiting structure 88. The limiting structure 88 is used for limiting the movement of the rack 851 to the beginning of the guide groove 813 and/or the end of the guide groove 813 without limit. Particularly, when the fan 82 moves to the inside of the housing 81, the rack 851 is prevented from being involved in other structures such as the fan 82, so that not only the spray head 84 cannot normally rotate, but also the fan 82 cannot normally operate; in the last aspect, the guide groove 813 may be designed to have a smaller groove width at either end, and the other end may be provided with a limiting structure 88.

The flexible rack in the above example is preferably a rack made of POM (polyoxymethylene) material which is lubricated and has high wear resistance.

The rotating mechanism is uniformly arranged at the front end of the fan no matter the steam source is arranged in the shell or outside the shell. And the steam generated by the steam source is positioned at the rear end of the fan.

The range hood of the embodiment of the disclosure is also provided with a filter screen for filtering grease in the oil smoke. In an example, a filter screen is arranged at the air inlet of the air duct. In another example, a filter screen is arranged at the air outlet of the air duct. In another example, as shown in fig. 9, a primary filter 71 is disposed at the air inlet 31 of the air duct 30, and a secondary filter 72 is disposed at the air outlet 32 of the air duct 30. The range hood of the embodiment of the present disclosure can also clean the filter screen through the steam cleaning device 80 provided in the air duct 30. When the high-temperature steam blows to the surface of the filter screen, the high-temperature steam can dissolve the oil dirt on the surface of the filter screen, and the dissolved oil dirt is discharged into the oil cup through the oil way.

The filter screen in the above example may be a metal filter screen, typically a plate-like structure with a grid mesh surface, mounted to the casing 10 by screws. When the filter screen is mounted on the range hood using the slot structure, the filter screen may be a flexible filter screen (for example, a filter screen made of PP polypropylene material) in addition to a metal filter screen. The slot structure is generally a straight structure, the opening of the slot is communicated with the outside, an operator can directly insert the filter screen into the slot from the opening from the outside to finish the installation (see fig. 10, the slot is installed on the casing 10, the notch on the surface of the casing 10 is a button hand 11 in the drawing, so that the position of the opening of the slot is conveniently indicated, when the operator touches the notch, the operator can determine that the opening 12 of the slot is near the notch, and then the filter screen is inserted into the slot). The socket structure 100 has an opening such that the screen 72 can be exposed at the opening after being installed (see fig. 11). In addition, the slot structure 100 may also be a structure with a bend (refer to the filter at the air outlet in fig. 1), and is preferably a flexible filter. Thus, the filter screen can be installed in a structurally adaptive deformation mode according to the slot structure, and then the filter screen is convenient to pull out.

The filter screen is of a structure with a plurality of meshes. The meshes can be uniformly arranged in one row or two or more rows. The mesh holes may be arranged in a length direction or a width direction thereof. In order to ensure that the filter screen has enough strength, the mesh length is arranged along the short side of the flat plate structure; further, the mesh length should not be too long. The number and arrangement of the meshes can be adjusted as required. The filter screen is installed in the air duct, and may be horizontal to the top of the kitchen range or inclined to a certain extent (the filter screen is installed at the inclined air outlet as shown in fig. 1).

The air duct may be formed by an interior space of a range hood housing. When the range hood is an integrated range hood, the air duct 30 is formed in a cavity between the cabinet 10 and the functional electric appliances 20 integrated in the cabinet. The air duct may be formed at the rear of the range hood housing, may be formed at both sides of the range hood (i.e., the structure shown in fig. 1), or may be formed at the rear and both sides of the range hood housing. In fig. 1, the air duct 30 is formed between the inner wall of the casing 10 and the outer wall of the functional electric appliance 20. The number of the air channels 30 is 1:1 corresponding to the number of the smoke generating areas.

When the range hood has at least two air channels, in order to trigger whether the range hood functions face the whole smoke generating area or part of the smoke generating area according to the smoke generating area, a baffle 50 can be arranged at the air inlet 31 of the air channel 30, and a driving mechanism 60 (see fig. 1) for controlling the opening and closing of the baffle can be arranged in the range hood. When a certain smoke generating area is monitored to generate smoke, the driving mechanism controls the baffle 50 of the air duct 30 corresponding to the smoke generating area to be opened, the oil smoke can enter the corresponding air inlet 31 and enter the air duct 30, the baffle 50 of the air duct corresponding to the smoke generating area is not opened, and the air duct 30 does not suck the oil smoke. In this process, the steam cleaning device 80 may also be used to clean the baffle 50, mainly the side of the baffle 50 facing the air duct 30.

The driving mechanism for controlling the opening and closing of the baffle plate comprises a driver and a transmission assembly. The driver may be a cylinder or a motor. The transmission assembly can realize transmission in a combination mode of a transmission wheel, a transmission rod and the like. The upstream transmission end of the transmission assembly is connected with the driver, and the downstream transmission end of the transmission assembly can drive the baffle to move so as to realize opening and closing. The opening and closing mode may be realized by lifting the baffle plate or may be realized by pushing the baffle plate in the horizontal direction. In the former embodiment, when the descent is open, when the air inlet is closed, the baffle needs to be arranged outside the air inlet; when the air inlet is opened, the baffle plate is required to be arranged in the air inlet when the air inlet is closed. In the latter embodiment, the shutter may be opened by moving in the case inward direction, or may be closed by moving in the case outward direction, and the shutter may be opened by moving in the opposite direction.

The transmission assembly can comprise gears or chain wheels or belt pulleys, and transmission is realized through gear meshing or a chain or belt mode, so that the downstream transmission end of the transmission assembly can drive the baffle to move up and down.

Alternatively, as shown in fig. 12 and 13, the transmission assembly includes a driving gear 61, a driven gear 62, a rack 63, and a link 64. The driver 66 is drivingly connected to the driving gear 61, the rack 63 is engaged between the driving gear 61 and the driven gear 62, and the driven gear 62 serves to stabilize the rack 63. The rack 63 is shown as a cylindrical structure. The end of the rack 63 is connected with the connecting rod 64, and the connecting rod 64 is connected with the baffle. When the driver 66 is a motor (e.g., a stepper motor), after the driver 66 is started, the driving gear 61 is driven to rotate in forward and reverse directions, so as to drive the connecting rod 64 connected to the baffle 50 to move up and down (see fig. 14). Specifically, when the driving gear 61 rotates clockwise, the rack gear 63 moves upward; when the driving gear 61 rotates counterclockwise, the rack gear 63 moves downward. The driving gear 61 and the driven gear 62 may be directly fixed to the side wall of the air duct 30, or may be fixed to the side wall of the air duct 30 by a mounting bracket 65.

The driving mechanism 60 is provided with a protective cover (see fig. 14) outside. The protective cover can be divided into two parts, namely a main cover and an auxiliary cover according to the transmission assembly. The main cover is used for packaging the driving gear, the driven gear and the rack. The auxiliary cover is used for packaging the racks, wherein the bottom surface of the auxiliary cover is open so as to facilitate lifting movement of the connecting rod. Under the setting, steam can not be directly sprayed to the device of the driving mechanism, and oil stains can not be accumulated on the device of the driving mechanism, so that the air duct oil stains can be cleaned conveniently.

To ensure that the oil smoke is as unobstructed as possible on the suction path within the tunnel 30, the steam cleaning device 80 may be provided on the side wall of the tunnel 30 (see fig. 1). With this arrangement, the space of the duct 30 can also be reasonably utilized. Thus, a drive mechanism 60 (see FIG. 14) for controlling the baffles may also be provided within the air chute 30.

When the air duct is formed in the cavity between the casing and the functional electric appliance integrated in the casing, the steam cleaning device is arranged on the side wall of the air duct, which is close to the functional electric appliance. The functional electric appliance is a functional electric appliance with a steam function, and steam generated by the functional electric appliance is sent into the air duct through the steam cleaning device.

Further, when the functional electric appliance 20 is integrated in the center of the range hood, as shown in fig. 1, two air channels 30 are formed on both sides of the range hood, and a steam cleaning device 80 is disposed in each air channel 30. The steam source of the steam cleaning device 80 comes from the functional appliance. The functional electric appliance 20 discharges the generated steam to the steam cleaning device 80 (see fig. 8) from both sides.

While several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (15)

1. The range hood comprises a shell, wherein an air duct and an air outlet area are arranged in the shell, and the air duct is used for sucking smoke from an air inlet of the range hood and guiding the smoke out of the air outlet area; the air duct is characterized in that a steam cleaning device is arranged in the air duct and is used for discharging steam into the air duct, and finally the steam enters the air outlet area from the air outlet and is discharged; the steam cleaning device comprises a shell and a rotating mechanism arranged in the shell; a spray head is arranged on the outer side of the shell and used for spraying steam into the air duct; the rotating mechanism is used for driving the spray head to rotate along the surface of the shell; the rotating mechanism comprises a second driver, a rack and a gear; the shell is provided with at least a hollowed-out part which allows the spray head to extend out of the shell at one side of the spray head; the shell is integrally hollowed out at one side of the spray head and in the rotation range of the spray head; guide grooves are respectively formed in two sides of the shell; the two ends of the rack are respectively accommodated in the guide grooves on two sides of the shell, the tooth mouth surface of the rack is meshed with the gear, the spray head is mounted on the non-tooth mouth surface of the rack, the second driver drives the gear to rotate, and the gear drives the rack to move along the guide grooves.

2. The range hood of claim 1 wherein the steam cleaning device further comprises a fan and a first drive disposed within the housing.

3. The range hood of claim 1 wherein when the steam is from a source of steam within the housing, the housing sidewall defines an air outlet, the nozzle communicating with the air outlet; or when the steam comes from a steam source outside the shell, the side wall of the shell is provided with an air inlet hole and an air outlet hole, and the spray head is communicated with the air outlet hole.

4. The range hood of claim 1, wherein the rack is a flexible rack, and the non-toothed surface of the rack shields the hollowed-out portion of the housing.

5. The range hood of claim 4 wherein the channel is divided into a plurality of channel segments, each channel segment having an opening at a wall of each channel segment.

6. The range hood of claim 5 wherein the walls of the trough section adjacent the opening have arcuate guide structures.

7. The range hood of claim 4, wherein the rack is provided with stop means at both ends.

8. The range hood according to claim 7, wherein the housing is provided with a limit structure on a front side of a start end of the guide groove, and/or the housing is provided with a limit structure on a rear side of a tail end of the guide groove, and the stop device is limited in the limit structure after one end of the rack moves to the limit structure.

9. The range hood according to any one of claims 1-8, wherein a primary filter screen is arranged at an air inlet of the air duct, and a secondary filter screen is arranged at an air outlet of the air duct; or a filter screen is arranged at the air inlet of the air duct; or a filter screen is arranged at the air outlet of the air duct.

10. A range hood according to any one of claims 1 to 8, wherein a baffle is provided at the front end of the air inlet of the air duct.

11. The range hood of any one of claims 1-8, wherein the air duct is formed in a cavity between the housing and a functional appliance integrated within the housing.

12. A range hood according to any one of claims 1 to 8, wherein the steam cleaning means is provided on a side wall of the duct.

13. The range hood of claim 1, wherein the duct is formed in a cavity between the housing and a functional appliance integrated within the housing; the steam cleaning device is arranged on the side wall of the air duct, which is close to the functional electrical appliance; the functional electrical appliance is a functional electrical appliance with a steam function; the functional electric appliance generates steam which is sent into the air duct through the steam cleaning device.

14. The range hood according to claim 13, wherein a side plate of the functional electric appliance forming a side wall of the air duct is used for installing the steam cleaning device, and the side plate is provided with an air outlet for generating steam; one surface of the steam cleaning device, which is arranged on the side plate, is provided with an air inlet hole; the air outlet is communicated with the air inlet; or, the side plate of the side wall of the air duct formed by the functional electric appliance is used for installing the steam cleaning device, the side plate is provided with an air outlet, and the air outlet is also used as an air inlet hole of the steam cleaning device.

15. The range hood of claim 13, wherein the functional electrical appliances are integrated in the center of the housing such that an air duct is formed on each side of the range hood; a steam cleaning device is arranged in each air duct.