CN219933049U - Range hood check valve with silencing function - Google Patents

Abstract

The utility model discloses a range hood check valve with a silencing function, which relates to the technical field of kitchen household appliances and comprises a valve core and four valve plates, wherein the valve core is a frustum body with a circular top surface and a square bottom surface, the circular top surface extends upwards to form a second extension section, a cross truss is arranged in the second extension section, and the cross truss divides an area in the circular top surface into 4 sector areas; the four valve plates are provided with blades with the shapes matched with the sector areas, and one side of each valve plate is rotationally connected to the cross truss; under the action of air flow passing through the valve core, the valve plate is switched between a closed state and an open state. The valve plate adopts a 1/4 circular structural design, and is in a fully opened state under a small pneumatic thrust when the smoke machine is in a low gear operation, so that the vortex loss of the upstream area of the valve plate is eliminated, and the vortex noise of the upstream area of the valve plate is reduced.

Description

Range hood check valve with silencing function

Technical Field

The utility model relates to the technical field of kitchen household appliances, in particular to a range hood check valve with a silencing function.

Background

The check valve is mainly used for preventing the backflow and backflow of smoke in an air duct or an external environment in the range hood, one end of the check valve is directly connected with the air outlet of the volute, and when the smoke thrown out by the impeller of the range hood at high speed rotates to flow through the check valve, turbulent noise is easily excited in the cavity area of the check valve due to high flow speed and high kinetic energy of the smoke, so that the check valve is one of noise sources of the range hood. Therefore, turbulence noise in the check valve cavity area of the smoke machine can be reduced by optimizing the check valve structure to reduce turbulence intensity of smoke in the check valve cavity area and reducing pulsation pressure of smoke in the check valve cavity area, so that working noise of the smoke machine is reduced.

The existing check valve of the range hood is generally composed of a valve body and a valve plate, wherein the valve body adopts a single-layer conical structure with round upper end and round lower end, the valve plate adopts a semicircular flat plate structure, a rotating shaft is arranged on the valve plate, and a rotating shaft hole and a limiting plate are arranged on the valve body. When the smoke machine operates, the valve plate is opened under the pneumatic thrust of the smoke machine, the opening angle of the valve plate is adjusted according to the gear response air quantity set by a user, and when the smoke machine is closed, the thrust of the valve plate disappears and returns to the limiting plate under the action of gravity. The check valve is relatively simple in structure, but the valve plate is usually in a non-fully opened state in the actual operation process of the smoke machine, vortex is easily generated in the upstream area of the valve plate, so that vortex loss of the smoke machine is increased, and vortex noise is also caused. In addition, because the valve body adopts the design of individual layer toper structure, when the flue gas flows through the check valve, the velocity of flow is fast, kinetic energy is strong, arouses turbulent noise in the check valve cavity region easily, and the noise directly propagates to the external world, leads to the complete machine operational noise of cigarette machine to be higher.

Disclosure of Invention

Aiming at vortex noise in the prior art, the utility model provides the check valve of the range hood with the silencing function, and the valve plate adopts a 1/4 circular structural design, so that when the range hood is in low-gear operation, the range hood is in a fully opened state under a very small pneumatic thrust, the vortex loss of the upstream area of the valve plate is eliminated, and the vortex noise of the upstream area of the valve plate is reduced.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a range hood check valve with sound deadening function, comprising:

the valve core is a frustum body with a circular top surface and a square bottom surface, the circular top surface extends upwards to form a second extension section, a cross truss is arranged in the second extension section, and the cross truss divides the area in the circular top surface into 4 sector areas;

the four valve plates are provided with blades with the shapes matched with the sector areas, and one side of each valve plate is rotationally connected to the cross truss;

under the action of air flow passing through the valve core, the valve plate is switched between a closed state and an open state.

The check valve with the silencing function for the range hood is characterized in that the square bottom surface extends outwards to form the first base of the valve core, and the lower surface of the first base is used for being connected with an air outlet of a volute of the range hood.

The check valve with the silencing function for the range hood is characterized in that the valve core is further sleeved with the valve body shell, the valve body shell is provided with the appearance matched with the valve core, the square bottom surface of the valve body shell extends outwards to form the second base of the valve body shell, the upper surface of the second base is used for being connected with the second base of the valve body shell, the circular top surface of the valve body shell extends outwards to form the lower limit plate of the external hose of the range hood, and the outer edge of the lower limit plate continues to extend upwards to form the extension section.

The check valve of the range hood with the silencing function further comprises silencing cotton adhered to the inner wall surface of the valve body shell.

The check valve of the range hood with the silencing function is characterized in that the center of the cross truss is provided with the round boss, the top surface of the round boss is provided with the spherical structure, the side wall surface of the round boss is provided with the rotating shaft mounting holes connected with the valve plate, the four end surfaces of the cross truss are provided with the bosses, the side wall surface of the boss is provided with the first rotating shaft mounting holes connected with the valve plate, the rotating shaft mounting holes of the bosses are internally provided with the limiting grooves and the return springs, one ends of the return springs are inserted into the limiting grooves of the second rotating shaft mounting holes, and the other ends of the return springs are inserted into the third rotating shaft mounting holes of the valve plate.

The check valve of the range hood with the silencing function is further characterized in that the first upper limiting plate of the valve plate is arranged on the top spherical surface of the circular boss, the second upper limiting plate of the valve plate is arranged on the top surface of the boss, and the outer edge of the crisscross truss extends upwards to form the second lower limiting plate of the valve plate.

As described above, the check valve for range hood with silencing function further comprises arc-shaped mounting holes reserved at three end corners of the valve plate, a rotating shaft is arranged on a right-angle side of the valve plate, a rotating shaft mounting hole for a return spring is formed in one end face of the rotating shaft, one end of the rotating shaft is connected with the return spring and is jointly inserted into the second rotating shaft mounting hole of the boss of the valve core with the return spring, and the other end of the rotating shaft is inserted into the first rotating shaft mounting hole of the circular boss of the valve core.

The check valve of the range hood with the silencing function has the advantages that the check valve of the range hood with the silencing function is further provided with the micro holes with different apertures on the conical wall surface of the valve core.

Compared with the prior art, the utility model has the beneficial effects that: the check valve of the range hood, which is designed by the utility model, has compact structure and convenient disassembly and assembly, the valve body adopts an inner and outer double-layer structure design, and the inner wall surface of the valve body shell is attached with silencing cotton, so that the check valve can be used for absorbing turbulent noise in the connection area of the check valve and the volute; the built-in valve core is provided with micro holes with different apertures, which can be used for filtering shock waves with different wave bands and different frequencies excited under the impact action of high-speed air flow in the cavity of the valve body, so that the pulsating pressure of the cavity area of the valve core is reduced, the turbulence intensity of the cavity area of the valve core is reduced, and the working noise of the smoke machine is reduced; in addition, the valve block adopts a 1/4 circular structural design, and when the smoke machine is in a low gear operation, the smoke machine is in a complete opening state under smaller pneumatic thrust, so that the vortex loss of an upstream area of the valve block is eliminated, and the vortex noise of the upstream area of the valve block is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a check valve for a range hood with a silencing function according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a valve body casing of a check valve of a range hood with a silencing function according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a noise damping cotton of a check valve of a range hood with a noise damping function according to an embodiment of the present utility model;

fig. 4 is a schematic structural view of a valve core of a check valve of a range hood with a silencing function according to an embodiment of the present utility model;

FIG. 5 is an enlarged view of a portion of the valve cartridge A shown in FIG. 4;

FIG. 6 is an enlarged view of a portion of the valve cartridge B shown in FIG. 4;

fig. 7 is a partial enlarged view at the spool C shown in fig. 4;

fig. 8 is a schematic structural view of a return spring of a range hood check valve with a silencing function according to an embodiment of the present utility model;

fig. 9 is a schematic structural view of a valve plate of a check valve of a range hood with a silencing function according to an embodiment of the present utility model;

FIG. 10 is an enlarged view of a portion of the valve sheet D shown in FIG. 9;

fig. 11 is another schematic structural view of a check valve for a range hood with a sound deadening function according to an embodiment of the present utility model.

Description of the drawings: 1. a valve body housing; 11. a first base; 111. a first mounting hole; 12. a second mounting hole; 13. a first lower limit plate; 14. a first extension; 2. silencing cotton; 3. a valve core; 31. a second base; 311. a third mounting hole; 32. a second extension; 321. a fourth mounting hole; 33. a crisscross truss; 331. a second lower limit plate; 34. a circular boss; 341. a first shaft mounting hole; 342. a first upper limit plate; 35. a boss; 351. a second shaft mounting hole; 352. a second upper limit plate; 353. a limit groove; 36. a return spring; 4. a valve plate; 41. an arc-shaped mounting hole; 42. a rotating shaft; 421. a shaft mounting hole; 371. a first micro hole; 372. and second micro holes.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples:

it should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

It is to be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counter-clockwise," "axial," "radial," "circumferential," and the like are directional or positional relationships as indicated based on the drawings, merely to facilitate describing the utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Referring to fig. 1-11, the check valve of the range hood with the silencing function comprises a valve body shell 1, silencing cotton 2, a valve core 3 and a valve plate 4. As shown in fig. 2, the valve body housing 1 adopts a conical structure design with a round upper end and a round lower end, a square bottom surface extends outwards to form a first base 11 of the valve body housing 1, and further, a first mounting hole 111 is formed in the first base 11; the circular top surface is provided with a second mounting hole 12. In some embodiments, the circular top surface of the valve body casing 1 extends outwards to form a first lower limit plate 13 of the external hose of the smoke machine, and the outer edge of the first lower limit plate 13 extends upwards to form a first extension section 14 of the circular top surface of the valve body casing 1 of the smoke machine.

Referring to fig. 3, the silencing cotton 2 is mainly used for absorbing turbulent noise caused by turbulent flow of air flow in the cavity area of the check valve; in some embodiments, the silencing cotton 2 is adhered to the inner wall surface of the valve body casing 1, and the silencing cotton 2 and the valve body casing 1 form secondary sound insulation of a cavity area of the check valve of the smoke machine.

Referring to fig. 4-7, the valve core 3 adopts a conical structure design with a round upper end and a round lower end, and the square bottom surface extends outwards to form a second base 31 of the valve core 3; further, a third mounting hole 311 is formed in the second base 31 of the valve core, the lower surface of the second base 31 of the valve core is connected with an air outlet of the smoke machine volute through the third mounting hole 311, and the upper surface of the second base 31 of the valve core is connected with the valve body shell 1 through the third mounting hole 311. The circular top surface extends upwards to form a second extension section 32 of the valve core 3, a fourth mounting hole 321 is formed in the second extension section 32, a cross truss 33 is arranged above the fourth mounting hole 321, and the outer edge of the cross truss 33 extends upwards to form a second lower limiting plate 331 of the valve plate 4. In some embodiments, a circular boss 34 is disposed at the center of the cross truss 33, the top surface of the circular boss 34 is in a spherical structural design, a first pivot mounting hole 341 of the valve plate 4 is formed on the side wall surface of the circular boss 34, and a first upper limit plate 342 of the valve plate 4 is disposed on the top spherical surface of the circular boss 34. The four end faces of the cross truss 33 are provided with bosses 35, further, the side wall faces of the bosses 35 are provided with second rotating shaft mounting holes 351 of the valve plates 4, and the top faces of the bosses 35 are provided with second upper limiting plates 352 of the valve plates 4; further, a limiting groove 353 and a return spring 36 are arranged in the second shaft mounting hole 351 of the boss 35, one end of the return spring 36 is inserted into the limiting groove 353 of the second shaft mounting hole 351, and the other end of the return spring 36 is inserted into the shaft mounting hole 421 of the valve plate 4; the purpose is that when the cigarette machine is in the state of stopping, make the valve block return to lower limiting plate through return spring, prevent that the valve block from adhering on second upper limiting plate 352 in the long-time use, can't rely on self gravity to get back to second lower limiting plate 331.

In some embodiments, the conical wall surface of the valve core 3 is provided with a first micro hole 371 and a second micro hole 372 with different apertures, the aperture difference between the first micro hole 371 and the second micro hole 372 is 2-3 mm, and further, the structures of the first micro hole 371 and the second micro hole 372 can be designed into a round shape, or can be designed into other shapes such as a triangle shape, a star shape and the like, so that the purpose is to filter shock waves with different wave bands and different frequencies excited under the high-speed airflow impact action of the valve core cavity area through the micro holes with different apertures, reduce the pulsation pressure of the valve core cavity area, reduce the turbulence intensity of the valve core cavity area, and further reduce the turbulence noise of the smoke machine check valve cavity area; the first micro holes 371 and the second micro holes 372 with different apertures formed on the conical wall surface of the valve core 3 form a primary silencing of the cavity area of the check valve of the smoke machine.

Referring to fig. 9-10, the valve plate 4 adopts a 1/4 circular structure design, wherein arc-shaped mounting holes 41 are reserved on three end corners of the valve plate 4, a rotating shaft 42 is arranged on a right-angle side of the valve plate 4, further, a rotating shaft mounting hole 421 of a return spring 36 is formed on one end face of the rotating shaft 42, one end of the rotating shaft 42 is connected with the return spring 36 and is jointly inserted into a second rotating shaft mounting hole 351 of a boss 35 of the valve core 3 with the return spring 36, and the other end of the rotating shaft 42 is inserted into a first rotating shaft mounting hole 341 of a circular boss 34 of the valve core 3. The valve plate 4 adopts a 1/4 circular structural design, and aims to eliminate vortex loss in an upstream area of the valve plate and reduce vortex noise in the upstream area of the valve plate when the smoke machine is in a low gear operation and is in a fully opened state under a small pneumatic thrust. The valve plate 4 forms three-stage silencing of the cavity area of the check valve of the smoke machine.

In summary, the check valve with the silencing function for the range hood provided by the utility model consists of four parts, namely a valve body shell 1, silencing cotton 2, a valve core 3 and a valve plate 4.

The built-in valve core 3 is provided with micro holes with different apertures, and shock waves with different wave bands and different frequencies excited under the impact action of high-speed air flow in the cavity area of the valve core are filtered through the micro holes, so that the pulsating pressure in the cavity area of the valve core is reduced, the turbulence intensity in the cavity area of the valve core is reduced, and the turbulence noise in the cavity area of the check valve of the smoke machine is reduced; micro holes with different apertures formed on the built-in valve core 3 form a primary silencing of a cavity area of the check valve of the smoke machine.

Further, the valve body shell 1 is connected with the valve core 3 in a threaded mode, and the silencing cotton 2 is attached to the inner wall surface of the valve body shell 1 and used for absorbing turbulence noise caused by the turbulence effect of air flow in the cavity area of the check valve, and the valve body shell 1 and the silencing cotton 2 are arranged in the cavity area of the check valve of the smoke machine to form secondary sound insulation.

Furthermore, the valve plate 4 adopts a 1/4 circular structure design, when the smoke machine is in a low gear operation, the smoke machine is in a fully opened state under a small pneumatic thrust, the vortex loss of the upstream area of the valve plate 4 is eliminated, the vortex noise of the upstream area of the valve plate 4 is reduced, and the 1/4 circular valve plate structure forms three-stage silencing of the cavity area of the check valve of the smoke machine.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the essence of the present utility model are intended to be included within the scope of the present utility model.

Claims (8)

1. A range hood check valve with sound deadening function, comprising:

the valve core is a frustum body with a circular top surface and a square bottom surface, the circular top surface extends upwards to form a second extension section, a cross truss is arranged in the second extension section, and the cross truss divides the area in the circular top surface into 4 sector areas;

the four valve plates are provided with blades with the shapes matched with the sector areas, and one side of each valve plate is rotationally connected to the cross truss;

under the action of air flow passing through the valve core, the valve plate is switched between a closed state and an open state.

2. The check valve of range hood with silencing function according to claim 1, wherein the square bottom surface extends outwards to form a first base of the valve core, and the lower surface of the first base is used for being connected with a volute air outlet of the range hood.

3. The range hood check valve with the silencing function according to claim 2, wherein a valve body shell is sleeved on the periphery of the valve core, the valve body shell is provided with an appearance matched with the valve core, a square bottom surface of the valve body shell extends outwards to form a second base of the valve body shell, the upper surface of the second base is used for being connected with the second base of the valve body shell, a circular top surface of the valve body shell extends outwards to form a lower limit plate of a range hood external hose, and the outer edge of the lower limit plate continues to extend upwards to form an extension section.

4. The check valve for range hood having a silencing function according to claim 3, further comprising silencing cotton adhered to an inner wall surface of the valve body housing.

5. The range hood check valve with the silencing function according to claim 1, wherein a circular boss is arranged in the center of the cross-shaped truss, the top surface of the circular boss is of a spherical structure, rotating shaft mounting holes connected with the valve plates are formed in the side wall surfaces of the circular boss, bosses are formed in the four end surfaces of the cross-shaped truss, first rotating shaft mounting holes connected with the valve plates are formed in the side wall surfaces of the bosses, a limiting groove and a return spring are arranged in the rotating shaft mounting holes of the bosses, one end of the return spring is inserted into the limiting groove of the second rotating shaft mounting hole, and the other end of the return spring is inserted into the third rotating shaft mounting hole of the valve plates.

6. The check valve with silencing function according to claim 5, wherein a first upper limiting plate of the valve plate is arranged on the top spherical surface of the circular boss, a second upper limiting plate of the valve plate is arranged on the top surface of the boss, and the outer edge of the cross truss extends upwards to form a second lower limiting plate of the valve plate.

7. The range hood check valve with the silencing function according to claim 6, wherein arc-shaped mounting holes are reserved on three end corners of the valve plate, a rotating shaft is arranged on a right-angle side of the valve plate, a rotating shaft mounting hole of a return spring is formed in one end face of the rotating shaft, one end of the rotating shaft is connected with the return spring and is jointly inserted into a second rotating shaft mounting hole of a boss of the valve core with the return spring, and the other end of the rotating shaft is inserted into a first rotating shaft mounting hole of a circular boss of the valve core.

8. The check valve for range hood with silencing function according to claim 1, wherein the tapered wall surface of the valve core is provided with micro holes with different apertures.