CN220956845U - Exhaust valve - Google Patents

Abstract

The utility model relates to an exhaust valve, which is used for realizing that at least two valve plates open all exhaust ports. The exhaust valve comprises a valve body and a valve block unit, wherein at least two exhaust ports are formed in the valve body, the valve block unit comprises at least two valve blocks, the valve blocks are connected with the valve body in a rotating mode, each valve block rotates relative to the valve body to open or close one exhaust port, a driving part is arranged on each valve block, in the process that media drive one valve block of two adjacent valve blocks to rotate relative to the valve body and open the corresponding exhaust port, the driving part of one valve block of the two adjacent valve blocks can drive the other valve block of the two adjacent valve blocks to rotate relative to the valve body, and therefore the other valve block can open the corresponding other exhaust port.

Description

Exhaust valve

Technical Field

The present utility model relates to an exhaust valve.

Background

The applicant submits a patent name of an exhaust valve in 2023 and 3.23.A patent number of 2023206045458, and the exhaust valve comprises a valve body, a damper and two metal valve plates, wherein the damper is fixedly connected with the valve body, two exhaust ports are arranged on the valve body, the valve plates are rotationally connected with the valve body, each valve plate rotates relative to the valve body to open or close one exhaust port, two magnets are arranged on the damper, and when each valve plate closes one exhaust port, each magnet adsorbs one metal valve plate so as to realize the improvement of the acting force of closing the exhaust port by the metal valve plate.

The exhaust effect of the exhaust valve is different at floors with different heights, specifically, the higher the floor is, the better the exhaust effect of the corresponding exhaust valve is; the lower the floor is, the poorer the smoke discharging effect of the corresponding exhaust valve is. The exhaust effect can be quantified by the parameter of 'flow rate', and the flow rate of the exhaust valve at the exhaust port of the exhaust valve is related to the number of the opened exhaust ports according to the Venturi effect, wherein the smaller the number of the opened exhaust ports is, the faster the flow rate is. Therefore, one of the factors affecting the exhaust effect on the exhaust valve is: whether or not both exhaust ports are simultaneously opened during the process of exhausting the oil smoke.

However, the applicant found that: after the exhaust valve is used for a period of time, one of the exhaust ports is opened by one metal valve plate (the exhaust port is called as an opened exhaust port), and the other exhaust port cannot be opened by the other metal valve plate (the exhaust port is called as a closed exhaust port), for the reason that the medium at the position of the closed exhaust port flows into the opened exhaust port, after the medium at the position of the closed exhaust port flows into the opened exhaust port, no obvious pressure difference is formed between the front surface and the back surface of the metal valve plate at the position of the closed exhaust port, so that the medium cannot push the metal valve plate at the position of the closed exhaust port to open the corresponding exhaust port, and the exhaust valve cannot achieve the exhaust effect specified by the application technical specification of a residential kitchen mixed exhaust passage system.

Disclosure of utility model

The utility model aims to solve the problem of providing an exhaust valve for realizing that at least two valve plates open all exhaust ports.

In order to solve the problems, the utility model provides the following technical scheme:

The exhaust valve comprises a valve body and a valve block unit, wherein at least two exhaust ports are formed in the valve body, the valve block unit comprises at least two valve blocks, the valve blocks are connected with the valve body in a rotating mode, each valve block rotates relative to the valve body to open or close one exhaust port, a driving part is arranged on each valve block, in the process that media drive one valve block of two adjacent valve blocks to rotate relative to the valve body and open the corresponding exhaust port, the driving part of one valve block of the two adjacent valve blocks can drive the other valve block of the two adjacent valve blocks to rotate relative to the valve body, and therefore the other valve block can open the corresponding other exhaust port.

In the utility model, the exhaust valve comprises a valve body and a valve block unit, at least two exhaust ports are arranged on the valve body, the valve block unit comprises at least two valve blocks, a driving part is arranged on each valve block, the valve blocks are driven by a medium (the medium is usually oil fume, but the medium can also be air, oxygen, gas containing peculiar smell and the like), and in the process that the medium drives one valve block of two adjacent valve blocks to rotate relative to the valve body and open the corresponding exhaust port, the other valve block of the two adjacent valve blocks interferes with the motion path of the driving part of the valve block of the two adjacent valve blocks, which means that: in the process that the medium drives one valve block of the two adjacent valve blocks to rotate relative to the valve body and opens the corresponding exhaust port, the driving part of the one valve block of the two adjacent valve blocks drives the other valve block of the two adjacent valve blocks to rotate relative to the valve body, and the other valve block of the two adjacent valve blocks opens the corresponding exhaust port. By the design, the driving part of one valve block of the two adjacent valve blocks drives the other valve block of the two adjacent valve blocks to rotate relative to the valve body, so that the condition that a medium cannot push one valve block of the valve block units to open a corresponding exhaust port is avoided, and the exhaust valve is ensured to achieve the exhaust effect specified in the technical regulations of the application of the residential kitchen mixed exhaust passage system.

Further, the valve plate comprises a body and a rotating shaft, the rotating shaft is arranged on the body, the rotating shaft is arranged on the valve body, and the body rotates relative to the valve body so as to open or close one of the exhaust ports;

The driving part is arranged on the rotating shaft and/or the driving part is arranged on the body.

When the driving part is arranged on the rotating shaft, the driving part is far away from the position of the adjacent valve plate for opening the exhaust port, namely the driving part positioned on the rotating shaft drives the adjacent valve plate to move in a larger range through a smaller rotating angle. So design, the drive part that is located the pivot has small, the timely advantage of drive force transmission.

When the driving part is arranged on the body, the driving part is adjacent to the position of the adjacent valve plate for opening the exhaust port, namely, the driving part positioned on the body drives the adjacent valve plate to move in an equal proportion manner. The driving part positioned on the body has the advantages of high driving force transmission accuracy and high precision.

Further, a gear is arranged on the valve plate, the gear is the driving part, and the gear is arranged on the rotating shaft. When the gear is a driving part, all valve plates can drive the valve plates adjacent to the gear to rotate relative to the valve body. By the design, the working reliability of the driving part is improved, and the manufacturing cost of the driving part is reduced.

Further, at least two teeth and at least one tooth slot are arranged on the gear, one tooth of the gear on one valve plate of the two adjacent valve plates is inserted into one tooth slot of the gear on the other valve plate of the two adjacent valve plates, and all the teeth can be in clearance fit with any tooth slot. When all teeth can be matched with any tooth slot gap, each valve plate has a free movable space, and each valve plate cannot synchronously rotate with the adjacent valve plates in the free movable space. So designed, the initial power required by the medium to push the valve plate to open its corresponding exhaust port is weakened.

Further, when one tooth of the gear on one of the two adjacent valve plates is inserted into one tooth slot of the gear on the other of the two adjacent valve plates, the gear on one of the two adjacent valve plates can move radially relative to the gear on the other of the two adjacent valve plates, and the minimum interval distance between the top of one tooth of the gear on one of the two adjacent valve plates and the bottom of one tooth slot of the gear on the other of the two adjacent valve plates is greater than or equal to 1mm. By means of the design, the space range of each valve plate for free movement is controlled by changing the minimum interval distance between the top of the tooth and the bottom of the tooth slot.

Further, the gear is provided with a mounting hole, a first rotation stopping surface is arranged on the hole wall of the mounting hole, a second rotation stopping surface is arranged on the side wall of the rotating shaft, and when the rotating shaft is inserted into the mounting hole, the first rotation stopping surface is matched with the second rotation stopping surface so as to limit the gear to rotate circumferentially relative to the rotating shaft. By the design, the gear is prevented from rotating relative to the rotating shaft, namely, the gear can not be driven to rotate with the gear meshed with the gear.

Further, be equipped with the disk seat on the valve body, be equipped with the mounting panel on the disk seat, the pivot runs through the mounting panel, works as the pivot runs through when the mounting panel, at least part the body is located the mounting panel is inboard, the gear is located the mounting panel outside, be equipped with on the valve body and be used for dodging the first space of dodging of gear. By the design, the gear is prevented from interfering with the body, and the gear is prevented from interfering with the valve body.

Further, a driving plate is arranged on the valve plate, the driving plate is the driving part, and the driving plate is arranged on the body. So designed, the initial power required by the drive part to drive the valve plates adjacent to the drive part to move is weakened.

Further, the valve body is provided with a strip-shaped channel, the extending direction of the strip-shaped channel is not parallel to the exhaust direction of the exhaust port, the rotating shaft can be inserted into the strip-shaped channel, and after the rotating shaft is inserted into the strip-shaped channel, the rotating shaft drives the body to slide along the strip-shaped channel, so that the body is close to or far away from the exhaust port. By the design, the medium can push the valve plate to open the exhaust port through any angle, so that the initial power required by the medium to push the valve plate to open the exhaust port is weakened.

Further, the body is made of metal, the exhaust valve further comprises a resistance reducer, an adsorption component and at least two diversion channels are arranged on the resistance reducer, the resistance reducer can be arranged on the valve body, when the resistance reducer is arranged on the valve body, each diversion channel is communicated with one exhaust port, and the adsorption component adsorbs the body made of metal so that the body closes the exhaust port. By the design, the probability of medium leakage of the exhaust port after the valve plate closes the exhaust port can be effectively reduced.

In the prior art, the gear is driven by the motor, when the gear is driven by the motor, whether the gear can rotate is determined by the power of the motor, and when the power of the motor is surplus, the gear can rotate under the drive of the motor even if other gears (meshed with the other gears) are used for obstructing the motor before the motor rotates. It is assumed that when the gear is used for the exhaust valve and the gear is driven by the motor, the oil smoke discharged by the range hood is attached to the surface of the gear, and the oil smoke attached to the surface of the gear can play a certain role in blocking the rotation of the gear, but the gear can still rotate normally on the premise that the motor has enough power.

Further, the exhaust valve further comprises a protective cover, the protective cover is arranged on the valve body, when the protective cover is arranged on the valve body, the protective cover and the valve body enclose a protective cavity, and at least part of the driving part is positioned in the protective cavity. So designed, the protection cover is used for protecting the driving part to reduce the probability of the driving part contacting with external objects. When the driving part is a gear, the protection cover is used for reducing the probability of the gear contacting with the lampblack. In the present utility model, the driving part is an unpowered driving part (or the gear is an unpowered gear), that is, the gear does not need to be driven by a power source. When the oil smoke is attached to the passively driven gear, firstly, consideration needs to be given to how to reduce the influence of the viscosity of the oil smoke on the gear. The gear is protected by the physical method of the protective cover, so that the probability of oil smoke adhesion to the gear is reduced.

Further, the valve body is provided with a valve seat, the valve seat is provided with a mounting plate, the valve plate is rotationally connected with the mounting plate, and the protective cover is detachably arranged on the mounting plate. Because the exhaust valve contacts oil smoke for a long time, when the protective cover is detachably arranged on the mounting plate, the protective cover can be conveniently detached and cleaned, and the driving part is also conveniently cleaned.

Further, a chute matched with the mounting plate is formed in the protective cover, the protective cover is sleeved on the mounting plate through the chute, and the protective cover slides along the mounting plate through the chute so as to enable the protective cover to be connected with or separated from the mounting plate;

And/or one of the protective cover and the mounting plate is provided with a positioning piece, and the other is provided with a matching piece matched with the positioning piece.

According to the utility model, the sliding chute is used for reducing the disassembly and assembly difficulty between the protective cover and the mounting plate, increasing the connection strength between the protective cover and the mounting plate and increasing the stability of the protective cover in the sliding process relative to the mounting plate.

In the utility model, the positioning piece and the matching piece are used for limiting the relative position between the protective cover and the mounting plate and increasing the connection strength between the protective cover and the mounting plate.

Further, when one of the protective cover and the mounting plate is provided with a positioning piece and the other is provided with a matching piece matched with the positioning piece, the positioning piece is provided with an inclined first guide surface, and the positioning piece can slide along the matching piece through the first guide surface;

Or when one of the protective cover and the mounting plate is provided with a positioning piece and the other is provided with a matching piece matched with the positioning piece, the matching piece is provided with an inclined first guide surface, and the matching piece can slide along the positioning piece through the first guide surface;

Or when the protective cover is provided with a chute matched with the mounting plate, the chute is provided with an inclined second guide surface, and the mounting plate can be inserted into the chute along the second guide surface;

Or, a first avoiding space for avoiding the driving part is formed in the valve body;

Or, a second avoidance space for avoiding the driving part is formed in the protective cover, the second avoidance space comprises an inclined surface and a limiting surface at least partially corresponding to the driving part, and the inclined surface is connected with the limiting surface;

or, a second avoidance space for avoiding the driving part is formed in the protective cover, the second avoidance space comprises an inclined surface and a limiting surface at least partially corresponding to the driving part, and the inclined surface and the limiting surface are in transition through a round angle;

Or, the body is provided with a mounting hole and a limiting plate, at least part of the limiting plate corresponds to the mounting hole, and the rotating shaft is inserted into the mounting hole so that the rotating shaft is arranged on the body; after the rotating shaft is inserted into the mounting hole, the rotating shaft can be abutted against the limiting plate.

Drawings

FIG. 1 is a first perspective view of an exhaust valve in a preferred embodiment of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a first perspective view of a portion of a vent valve in a preferred embodiment of the utility model;

FIG. 4 is a top view of a portion of a vent valve in a preferred embodiment of the utility model;

FIG. 5 is a perspective view of a hub and gear in a preferred embodiment of the present utility model;

FIG. 6 is a second perspective view of a portion of the vent valve in the preferred embodiment of the utility model;

FIG. 7 is a second perspective view of the vent valve in the preferred embodiment of the utility model;

FIG. 8 is a third perspective view of the vent valve in the preferred embodiment of the utility model;

Fig. 9 is a perspective view of a fixing plate in a preferred embodiment of the present utility model;

FIG. 10 is a rear view of the vent valve in the preferred embodiment of the utility model;

FIG. 11 is a cross-sectional view at B-B in FIG. 10;

FIG. 12 is a third perspective view of a portion of a vent valve in accordance with the preferred embodiment of the utility model;

FIG. 13 is a perspective view of the mounting plate, shaft, gears and boot of the preferred embodiment of the present utility model;

FIG. 14 is a first perspective view (first configuration) of the protective shield in a preferred embodiment of the present utility model;

FIG. 15 is a perspective view (second configuration) of a protective shield in accordance with a preferred embodiment of the present utility model;

Fig. 16 is a second perspective view (first configuration) of the protective shield in a preferred embodiment of the present utility model.

Detailed Description

The technical solutions of the embodiments of the present utility model will be explained and illustrated below with reference to the drawings of the embodiments of the present utility model, but the following embodiments are only preferred embodiments of the present utility model, and not all embodiments. Based on the examples in the implementation manner, other examples obtained by a person skilled in the art without making creative efforts fall within the protection scope of the present utility model.

Referring to fig. 1 and 2, the exhaust valve includes a valve body 1 and a valve block unit 2, at least two exhaust ports 11 are provided on the valve body 1, the valve block unit 2 includes at least two valve blocks 21, the valve blocks 21 are rotationally connected with the valve body 1, each valve block 21 rotates relative to the valve body 1 to open or close one of the exhaust ports 11, a driving portion 213 is provided on each valve block 1, in the process that media drives one valve block 21 of the two adjacent valve blocks 21 to rotate relative to the valve body 1 and open its corresponding exhaust port 11, the driving portion 213 of one valve block 21 of the two adjacent valve blocks 21 can drive the other valve block 21 of the two adjacent valve blocks to rotate relative to the valve body 1, so that the other valve block 21 opens its corresponding other exhaust port 11.

In this embodiment, two exhaust ports 11 and two valve plates 21 are taken as examples: be equipped with first gas vent and second gas vent on the valve body 1, the valve block unit includes first valve block and second valve block, be equipped with first drive portion on the first valve block, be equipped with second drive portion on the second valve block, first valve block is adjacent with the second valve block, first valve block rotates and is used for opening or closing first gas vent relative to valve body 1, second valve block rotates and is used for opening or closing the second gas vent relative to valve body 1, in the medium drive first valve block rotates and opens the in-process of first gas vent relative to valve body 1, the first drive portion of first valve block can drive the rotation of second valve block relative to valve body 1, so that the second gas vent is opened to the second valve block.

In this embodiment, taking three exhaust ports 11 and three valve plates 21 as examples: the valve body 1 is provided with a first exhaust port, a second exhaust port and a third exhaust port, the valve block unit comprises a first valve block, a second valve block and a third valve block, the first valve block is provided with a first driving part, the second valve block is provided with a second driving part, the third valve block is provided with a third driving part, the first valve block is adjacent to the second valve block, the first valve block rotates relative to the valve body 1 and is used for opening or closing the first exhaust port, the second valve block rotates relative to the valve body 1 and is used for opening or closing the second exhaust port, the third valve block rotates relative to the valve body 1 and is used for opening or closing the third exhaust port, and in the process that a medium drives the first valve block to rotate relative to the valve body 1 and opens the first exhaust port, the first driving part of the first valve block can drive the second valve block to rotate relative to the valve body 1 so as to enable the second valve block to open the second exhaust port; in the process of opening the second exhaust port by the second valve plate, the second driving part of the second valve plate can drive the third valve plate to rotate relative to the valve body 1, so that the third valve plate can open the third exhaust port.

In this embodiment, taking four exhaust ports 11 and four valve plates 21 as examples: the valve body 1 is provided with a first exhaust port, a second exhaust port, a third exhaust port and a fourth exhaust port, the valve block unit comprises a first valve block, a second valve block, a third valve block and a fourth valve block, the first valve block is provided with a first driving part, the second valve block is provided with a second driving part, the third valve block is provided with a third driving part, the fourth valve block is provided with a fourth driving part, the first valve block is adjacent to the second valve block, the third valve block is adjacent to the fourth valve block, the first valve block rotates relative to the valve body 1 and is used for opening or closing the first exhaust port, the second valve block rotates relative to the valve body 1 and is used for opening or closing the third exhaust port, the fourth valve block rotates relative to the valve body 1 and is used for opening or closing the fourth exhaust port, and in the process that the medium drives the second valve block rotates relative to the valve body 1 and opens the second exhaust port, the second driving part of the second valve block can drive the first valve block to rotate relative to the valve body 1 so that the first valve block opens the first exhaust port; in the process that the medium drives the third valve plate to rotate relative to the valve body 1 and opens the third exhaust port, the third driving part of the third valve plate can drive the fourth valve plate to rotate relative to the valve body 1, so that the fourth valve plate opens the fourth exhaust port.

In the utility model, the exhaust valve comprises a valve body 1 and a valve block unit 2, wherein at least two exhaust ports 11 are arranged on the valve body 1, the valve block unit 2 comprises at least two valve blocks 21, a driving part 213 is arranged on each valve block 21, the valve blocks 21 are driven by a medium, and in the process that the medium drives one valve block 21 of the two adjacent valve blocks 21 to rotate relative to the valve body 1 and open the corresponding exhaust port 11, the motion path of the driving part 213 of the other valve block 21 of the two adjacent valve blocks 21 is interfered with the motion path of the other valve block 21 of the two adjacent valve blocks 21, which means that: in the process that the medium drives one valve plate 21 of the two adjacent valve plates 21 to rotate relative to the valve body 1 and opens the corresponding exhaust port 11, the driving part 213 of the one valve plate 21 of the two adjacent valve plates 21 drives the other valve plate 21 of the two adjacent valve plates 21 to rotate relative to the valve body 1, and the other valve plate 21 of the two adjacent valve plates 21 opens the corresponding exhaust port 11. The driving part 213 of one valve plate 21 of the two adjacent valve plates 21 drives the other valve plate 21 of the two adjacent valve plates 21 to rotate relative to the valve body 1, so that the condition that a medium cannot push one valve plate 21 of the valve plate unit 2 to open the corresponding exhaust port 11 is avoided, namely, the exhaust valve is ensured to achieve the exhaust effect specified in the technical specification of the application of the residential kitchen mixed exhaust passage system.

Referring to fig. 2 and 3, the valve sheet 21 includes a body 211 and a rotation shaft 212, the rotation shaft 212 is provided at the body 211, the rotation shaft 212 is provided at the valve body 1, and the body 211 rotates relative to the valve body 1 to open or close one of the exhaust ports 11; the driving unit 213 is provided on the rotation shaft 212. When the driving portion 213 is disposed on the rotating shaft 212, the driving portion 213 is away from the position of the adjacent valve plate 21 for opening the exhaust port 11, i.e. the driving portion 213 disposed on the rotating shaft 212 drives the adjacent valve plate 21 to move in a larger range through a smaller rotation angle. In this structure, the driving portion 213 located on the rotating shaft 212 has the advantages of small volume and timely driving force transmission.

In other embodiments of the present utility model, the driving part is provided on the body; or the driving part is arranged on the rotating shaft and is also arranged on the body; when the driving part is arranged on the body, the driving part is adjacent to the position of the adjacent valve plate for opening the exhaust port, namely the driving part positioned on the body drives the adjacent valve plate to move in an equal proportion mode. In this structure, the driving part located on the body has the advantages of high driving force transmission accuracy and high precision.

Referring to fig. 3 and 5, a gear is provided on the valve plate 21, the gear is a driving part 213, and the gear is provided on the rotating shaft 212. When the gear is the driving part 213, all the valve plates 21 can drive the valve plates 21 adjacent to the gear to rotate relative to the valve body 1. In other embodiments of the present utility model, the driving part may be a driving block or a driving groove provided on the rotation shaft.

In addition, in other embodiments of the present utility model, a driving plate is disposed on the valve plate, the driving plate is the driving portion, and the driving plate is disposed on the body. This structure can effectively weaken the initial power required by the driving part to drive the valve plates adjacent to the driving part to move.

Referring to fig. 4 and 5, at least two teeth 2131 and at least one tooth groove 2132 are provided on the gear, one tooth 2131 of the gear on one valve plate 21 of the two adjacent valve plates 21 is inserted into one tooth groove 2132 of the gear on the other valve plate 21 of the two adjacent valve plates 21, and all the teeth 2131 can be in clearance fit with any one tooth groove 2132. When all teeth 2131 are clearance fit with any tooth slot 2132, each valve plate 21 has a free movable space, and each valve plate 21 cannot synchronously rotate with the adjacent valve plate 21 in the free movable space. This structure is mainly used for weakening the initial power required by the medium to push the valve plate 21 to open its corresponding exhaust port 11, i.e. only one of the exhaust ports 11 needs to be opened in the initial state of the medium.

In this embodiment, when one tooth 2131 of the gear on one valve plate 21 of the two adjacent valve plates 21 is inserted into one tooth slot 2132 of the gear on the other valve plate 21 of the two adjacent valve plates 21, the gear on one valve plate 21 of the two adjacent valve plates 21 can move radially relative to the gear on the other valve plate 21 of the two adjacent valve plates 21, and the minimum distance between the top of one tooth 2131 of the gear on one valve plate 21 of the two adjacent valve plates 21 and the bottom of one tooth slot 2132 of the gear on the other valve plate 21 of the two adjacent valve plates 21 is L, where L is greater than or equal to 1mm. The control of the spatial extent of each valve plate 21 for free movement is achieved by varying the minimum separation distance between the top of tooth 2131 and the bottom of tooth socket 2132.

When L is greater than or equal to 1mm, the contact between one tooth of the gear on one valve plate 21 of the two adjacent valve plates 21 and one tooth socket 2132 of the gear on the other valve plate 21 of the two adjacent valve plates 21 is changed from 'surface contact' to 'line contact'; or, when L is greater than or equal to 1mm, the contact area between one tooth of the gear on one valve plate 21 of the two adjacent valve plates 21 and one tooth socket 2132 of the gear on the other valve plate 21 of the two adjacent valve plates 21 will be smaller. This structure is realized by reducing the adhesive strength between two gears to which the soot is attached, to further reduce the influence of the soot viscosity on the gears, reduce the cleaning frequency of the gears, and reduce the thrust force required for the valve plate 21 (to which the soot is attached) to open the exhaust port 11.

Referring to fig. 5, a gear is provided with a mounting hole 2133, a wall of the mounting hole 2133 is provided with a first rotation stopping surface 2134, a side wall of the rotating shaft 212 is provided with a second rotation stopping surface 2121, and when the rotating shaft 212 is inserted into the mounting hole 2133, the first rotation stopping surface 2134 cooperates with the second rotation stopping surface 2121 to limit the gear to rotate circumferentially relative to the rotating shaft 212.

Referring to fig. 6, the valve body 1 is provided with a first escape space 13 for escaping the driving part 213, and the protection cover 4 is inserted into the first escape space 13 and is located on a wall of the first escape space 13 in abutment with the valve body 1. Wherein, in the space 13 is dodged to first dodging to at least part disk seat 12, when the space 13 is dodged to first dodging to at least part disk seat 12, first dodging space 13 provides the mounted position for disk seat 12, and first dodging space 13 still is used for protecting disk seat 12 to reduce disk seat 12 and receive the probability that takes place deformation after the impact of external object.

At least part of the strip-shaped channel 121 is located outside the first avoiding space 13, and when at least part of the strip-shaped channel 121 is located outside the first avoiding space 13, the rotating shaft 212 can drive the body 211 to rotate relative to the strip-shaped channel 121. The "at least part of the strip-shaped channel 121 is located outside the first avoiding space 13" is mainly used for avoiding interference between the valve plate 21 and the valve body 1 during the rotation process of the valve plate 21 relative to the valve body 1.

In one preferred embodiment, the strip-shaped channel 121 is located outside the first escape space 13. The strip-shaped channel 121 is positioned outside the first avoiding space 13, so that the two actions of sliding the valve plate 21 relative to the valve body 1 and rotating the valve plate 21 relative to the valve body 1 can be synchronously performed.

In another preferred embodiment, at least part of the strip-shaped channel 121 is located in the first avoiding space 13, and when at least part of the strip-shaped channel 121 is located in the first avoiding space 13, the rotating shaft 212 can drive the body 211 to slide relative to the strip-shaped channel 121. The "at least part of the strip-shaped channel 121 is located in the first avoiding space 13" is mainly the guide of the valve plate 21 in the sliding direction relative to the valve body 1, so that the action of opening the exhaust port 11 by the valve plate 21 is prior to the action of rotating the valve plate 21 relative to the valve body 1.

As can be seen from fig. 2 and 3, the valve body 1 is provided with the valve seat 12, the valve seat 12 is provided with the mounting plate 122, the rotating shaft 212 penetrates through the mounting plate 122, when the rotating shaft 212 penetrates through the mounting plate 122, at least part of the body 211 is positioned at the inner side of the mounting plate 122, the gear is positioned at the outer side of the mounting plate 122, and the valve body 1 is provided with the first avoidance space 13 for avoiding the gear. This structure can effectively avoid the interference between the gear and the body 211 and the interference between the gear and the valve body 1.

Referring to fig. 3 and 6, the valve body 1 is provided with a bar-shaped channel 121, the bar-shaped channel 121 is located on the mounting plate 122, the extending direction of the bar-shaped channel 121 is not parallel to the exhausting direction of the exhaust port 11, the rotating shaft 212 can be inserted into the bar-shaped channel 121, and after the rotating shaft 212 is inserted into the bar-shaped channel 121, the rotating shaft 212 drives the body 211 to slide along the bar-shaped channel 121, so that the body 211 approaches or departs from the exhaust port 11. This means that after the strip-shaped channel 121 is provided in the valve body 1, the gear on one valve plate 21 of the two adjacent valve plates 21 can move radially relative to the gear on the other valve plate 21 of the two adjacent valve plates 21. In this structure, the medium can push the valve plate 21 to open the exhaust port 11 by any angle, so as to weaken the initial power required by the medium to push the valve plate 21 to open the exhaust port 11.

Referring to fig. 1, 3 and 7, the body 211 is made of metal, the exhaust valve further includes a damper 3, an adsorption assembly 31 and at least two diversion channels 32 are provided on the damper 3, the adsorption assembly 31 may be a permanent magnet, the adsorption assembly 31 may be an electromagnet, the damper 3 may be provided on the valve body 1, when the damper 3 is provided on the valve body 1, each diversion channel 32 is communicated with one exhaust port 11, and the adsorption assembly 31 adsorbs the body 211 made of metal, so that the body 211 closes the exhaust port 11. This structure can effectively reduce the probability of medium leakage of the exhaust port 11 after the valve sheet 21 closes the exhaust port 11.

Referring to fig. 8, 10 and 11, the exhaust valve further includes a protection cover 4, and the protection cover 4 is used to protect the driving part 213 so as to reduce the probability that the driving part 213 is in contact with an external object. In this embodiment, the protection cover 4 is disposed on the valve body 1, when the protection cover 4 is disposed on the valve body 1, the protection cover 4 and the valve body 1 enclose a protection cavity 5, and at least part of the driving portion 213 is disposed in the protection cavity 5, wherein, as can be seen in fig. 11, preferably, when the driving portion 213 is a gear, the whole gear is disposed in the protection cavity 5.

Referring to fig. 11 and 12, the valve body 1 is provided with a valve seat 12, the valve seat 12 is provided with a mounting plate 122, the valve plate 21 is rotatably connected with the mounting plate 122, and the protection cover 4 is detachably arranged on the mounting plate 122. The mounting plate 122 extends away from the exhaust port 11, and a space is provided for mounting the protective cover 4 and the rotary shaft 212 on the mounting plate 122.

In this embodiment, the main body 211 is provided with a mounting hole 2110 and a limiting plate 2112, at least part of the limiting plate 2112 corresponds to the mounting hole 2110, and the rotating shaft 212 is inserted into the mounting hole 2110, so that the rotating shaft 212 is disposed on the main body 211; wherein, after the shaft 212 is inserted into the mounting hole 2110, the shaft 212 can abut against the limiting plate 2112, specifically: referring to fig. 6, 8, 9 and 11, the valve plate 21 includes a main body 211 and a rotating shaft 212, the main body 211 is provided with a fixing plate 2111, a mounting hole 2110 and a limiting plate 2112 are formed in the fixing plate 2111, one end of the rotating shaft 212 is inserted into the mounting hole 2110, and after one end of the rotating shaft 212 is inserted into the mounting hole 2110, one end of the rotating shaft 212 can abut against the limiting plate 2112; the other end of the rotating shaft 212 is sleeved with a gear, and when one end of the rotating shaft 212 is inserted into the mounting hole 2110 and the other end of the rotating shaft 212 is sleeved with the gear, the rotating shaft 212 penetrates through the strip-shaped channel 121; the protective cover 4 is provided with a chute 41 matched with the mounting plate 122, the protective cover 4 is sleeved on the mounting plate 122 through the chute 41, and the protective cover 4 slides along the mounting plate 122 through the chute 41 so as to enable the protective cover 4 to be connected with or separated from the mounting plate 122. Since the exhaust valve is in contact with the oil smoke for a long time, when the protection cover 4 is detachably provided to the mounting plate 122, the protection cover 4 can be easily detached and cleaned, and the driving part 213 can be easily cleaned.

In the utility model, the sliding groove 41 is used for reducing the dismounting difficulty between the protective cover 4 and the mounting plate 122, increasing the connection strength between the protective cover 4 and the mounting plate 122 and increasing the stability of the protective cover 4 in the sliding process relative to the mounting plate 122.

Referring to fig. 6, 11 and 12, when the protection cover 4 is fitted over the mounting plate 122 through the slide groove 41, the protection cover 4 is inserted into the first escape space 13, and the protection cover 4 abuts against the wall of the valve body 1 located in the first escape space 13. In this structure, the wall of the valve body 1 in the first avoiding space 13 provides a supporting position for the protection cover 4 except for the mounting plate 122, so as to avoid the protection cover 4 from tilting, shaking, etc.

Referring to fig. 13, the protection cover 4 is provided with an avoidance groove 42, the avoidance groove 42 is vertically penetrated, and the notch of the avoidance groove 42 is vertically arranged. During the sliding of the protective cover 4 along the mounting plate 122 through the sliding groove 41, the avoiding groove 42 is sleeved on the rotating shaft 212 through the opening thereof.

As can be seen from fig. 12, the projection of the strip-shaped channel 121 on the horizontal plane can be located in the relief groove 42, in other words, the strip-shaped channel 121 corresponds to the relief groove 42 when the protective cover 4 is provided on the valve body 1. When the projection of the bar-shaped channel 121 on the horizontal plane is located in the avoiding groove 42, the rotation shaft 212 drives the body 211 to slide along the bar-shaped channel 121 without contacting with the avoiding groove 42. This structure makes the protection cover 4 not interfere with the movement of the valve plate 21 relative to the valve body 1.

In this embodiment, one of the protective cover 4 and the mounting plate 122 is provided with a positioning member 43, and the other is provided with a mating member (not labeled) that mates with the positioning member 43, and referring to fig. 12 and 14, the positioning member 43 is disposed on the protective cover 4, and the mating member is disposed on the mounting plate 122: the positioning piece 43 is a positioning rod, the matching piece is a matching hole, and the positioning rod is inserted into the matching hole so as to realize the fixed connection between the protection cover 4 and the mounting plate 122.

In the prior art, the exhaust valve is used for exhausting the oil smoke of the range hood, and the exhaust valve is in the oil smoke environment for a long time, so that the gear is attached with the oil smoke, the difficulty of opening the exhaust port 11 by the valve plate 21 (the requirement of the exhaust gas amount balance performance of the flue) can be increased by the gear attached with the oil smoke, and therefore, the protection cover 4 is detached from the exhaust valve and the gear is cleaned, so that the purpose of opening the exhaust port when the range hood reaches the preset exhaust gas amount is achieved. Preferably, when one of the protective cover 4 and the mounting plate 122 is provided with the positioning member 43 and the other is provided with the mating member that mates with the positioning member 43, the positioning member 43 is provided with the inclined first guide surface 431, and the positioning member 43 can slide along the mating member through the first guide surface 431. In this structure, the first guide surface 431 serves as a guide to reduce the difficulty in removing the protective cover 4 from the mounting plate 122.

In other embodiments of the utility model, when one of the protective cover and the mounting plate is provided with a positioning member and the other is provided with an engaging member engaging with the positioning member, the engaging member is provided with a first inclined guide surface by which the engaging member can slide along the positioning member.

Referring to fig. 10, 14 and 16, when the protective cover 4 is provided with the slide groove 41 matched with the mounting plate 122, the slide groove 41 is provided with the inclined second guide surface 411, and the mounting plate 122 can be inserted into the slide groove 41 along the second guide surface 411. In this structure, the second guide surface 411 is used to reduce the difficulty of inserting the mounting plate 122 into the chute 41.

In this embodiment, the protection cover 4 is provided with a second avoidance space 44 for avoiding the driving portion 213, where the second avoidance space 44 includes an inclined surface 442 and a limiting surface 441 at least partially corresponding to the driving portion 213, and the inclined surface 442 and the limiting surface 441 have two transition modes: 1. referring to fig. 16, the inclined surface 442 engages with the limit surface 441; 2. referring to fig. 15, the inclined surface 442 and the limiting surface 441 are rounded.

When the inclined surface 442 is engaged with the limiting surface 441, the limiting surface 441 has a larger horizontal area without changing other structures of the protective cover 4, and the structure can effectively increase the areas corresponding to the limiting surface 441 and the driving portion 213.

When the inclined surface 442 and the limiting surface 441 are in rounded transition, the inclined surface 442 has a larger avoiding space under the condition that other structures of the protective cover 4 are not changed, and the structure can effectively reduce the probability of interference between the inclined surface 442 and the driving portion 213. While the utility model has been described in terms of specific embodiments, it will be appreciated by those skilled in the art that the utility model is not limited thereto but includes, but is not limited to, those shown in the drawings and described in the foregoing detailed description. Any modifications which do not depart from the functional and structural principles of the present utility model are intended to be included within the scope of the appended claims.

Claims (10)

1. The exhaust valve comprises a valve body and a valve block unit, wherein at least two exhaust ports are formed in the valve body, the valve block unit comprises at least two valve blocks, the valve blocks are connected with the valve body in a rotating mode, each valve block rotates relative to the valve body to open or close one exhaust port.

2. The exhaust valve of claim 1, wherein the valve plate comprises a body and a rotating shaft, the rotating shaft is arranged on the body, the rotating shaft is arranged on the valve body, and the body rotates relative to the valve body to open or close one of the exhaust ports;

The driving part is arranged on the rotating shaft and/or the driving part is arranged on the body.

3. The exhaust valve according to claim 2, wherein a gear is provided on the valve plate, the gear is the driving part, and the gear is provided on the rotating shaft.

4. The exhaust valve according to claim 3, wherein the gear is provided with at least two teeth and at least one tooth slot, one tooth of the gear on one of the two adjacent valve plates is inserted into one tooth slot of the gear on the other of the two adjacent valve plates, and all the teeth can be in clearance fit with any one tooth slot.

5. The exhaust valve according to claim 4, wherein when one tooth of the gear on one of the two adjacent valve plates is inserted into one tooth groove of the gear on the other of the two adjacent valve plates, the gear on one of the two adjacent valve plates can move radially relative to the gear on the other of the two adjacent valve plates, and a minimum distance between a top of one tooth of the gear on one of the two adjacent valve plates and a bottom of one tooth groove of the gear on the other of the two adjacent valve plates is 1mm or more;

and/or the gear is provided with a mounting hole, the hole wall of the mounting hole is provided with a first rotation stopping surface, the side wall of the rotating shaft is provided with a second rotation stopping surface, and when the rotating shaft is inserted into the mounting hole, the first rotation stopping surface is matched with the second rotation stopping surface so as to limit the gear to rotate circumferentially relative to the rotating shaft.

6. The vent valve of claim 2 further comprising a protective cover disposed on the valve body, wherein the protective cover and the valve body define a protective cavity when the protective cover is disposed on the valve body, and wherein at least a portion of the drive portion is disposed within the protective cavity.

7. The vent valve of claim 6 wherein the valve body is provided with a valve seat, the valve seat is provided with a mounting plate, the valve plate is rotatably connected to the mounting plate, and the protective cover is detachably disposed on the mounting plate.

8. The exhaust valve according to claim 7, wherein the protective cover is provided with a chute matched with the mounting plate, the protective cover is sleeved on the mounting plate through the chute, and the protective cover slides along the mounting plate through the chute so as to connect or disconnect the protective cover with the mounting plate;

And/or one of the protective cover and the mounting plate is provided with a positioning piece, and the other is provided with a matching piece matched with the positioning piece.

9. The vent valve of claim 8 wherein when one of said shield and said mounting plate is provided with a retainer and the other is provided with a mating member that mates with said retainer, said retainer is provided with a sloped first guide surface along which said retainer can slide;

Or when one of the protective cover and the mounting plate is provided with a positioning piece and the other is provided with a matching piece matched with the positioning piece, the matching piece is provided with an inclined first guide surface, and the matching piece can slide along the positioning piece through the first guide surface;

Or when the protective cover is provided with a chute matched with the mounting plate, the chute is provided with an inclined second guide surface, and the mounting plate can be inserted into the chute along the second guide surface;

Or, a first avoiding space for avoiding the driving part is formed in the valve body;

Or, a second avoidance space for avoiding the driving part is formed in the protective cover, the second avoidance space comprises an inclined surface and a limiting surface at least partially corresponding to the driving part, and the inclined surface is connected with the limiting surface;

or, a second avoidance space for avoiding the driving part is formed in the protective cover, the second avoidance space comprises an inclined surface and a limiting surface at least partially corresponding to the driving part, and the inclined surface and the limiting surface are in transition through a round angle;

Or, the body is provided with a mounting hole and a limiting plate, at least part of the limiting plate corresponds to the mounting hole, and the rotating shaft is inserted into the mounting hole so that the rotating shaft is arranged on the body; after the rotating shaft is inserted into the mounting hole, the rotating shaft can be abutted against the limiting plate.

10. The exhaust valve according to claim 2, wherein a driving plate is arranged on the valve plate, the driving plate is the driving part, and the driving plate is arranged on the body;

And/or a strip-shaped channel is arranged on the valve body, the extending direction of the strip-shaped channel is not parallel to the exhaust direction of the exhaust port, the rotating shaft can be inserted into the strip-shaped channel, and after the rotating shaft is inserted into the strip-shaped channel, the rotating shaft drives the body to slide along the strip-shaped channel so as to enable the body to be close to or far away from the exhaust port; the body is made by the metal, discharge valve still includes the friction reducer, be equipped with adsorption component and two at least water conservancy diversion passageway on the friction reducer, the friction reducer can be located the valve body, when the friction reducer is located the valve body, every water conservancy diversion passageway and an gas vent intercommunication, adsorption component adsorbs the body of being made by the metal, so that the body is closed the gas vent.