CN219692352U - Check valve and range hood - Google Patents

Abstract

The utility model provides a check valve and a range hood, and relates to the technical field of kitchen appliances, wherein the check valve comprises: a valve body and a ball check member; the valve body comprises a first pipeline and a second pipeline; the first pipeline extends vertically; one end of the second pipeline is communicated with the side wall of the first pipeline, and the second pipeline is inclined from bottom to top in a direction away from the first pipeline; the ball-shaped non-return part is positioned at the junction of the first pipeline and the second pipeline; the diameter of the spherical check component is larger than that of the first pipeline and smaller than or equal to that of the second pipeline; a guide structure is arranged in the first pipeline and used for guiding the spherical check component below the guide structure to enter the second pipeline; the ball-shaped check part is positioned in the first pipeline and is contacted with the inner wall of the first pipeline to block the first pipeline; in the working state, the ball check part is positioned in the second pipeline, and the first pipeline is in a conducting state.

Description

Check valve and range hood

Technical Field

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

Background

The check valve is arranged on the range hood and used for reducing the backflow of smoke. The check valve is generally arranged at the air outlet of the range hood, and is provided with two blades and a return spring in the middle. When the smoke exhaust ventilator discharges smoke, the blades are blown open, and when the smoke exhaust ventilator stops, the blades are pressed into a closed state by the springs, so that the smoke is prevented from flowing backwards.

Because the check valve blade opens and closes and have the gap, there is the gap around the blade and the check valve is inside, and the blade gyration also can have the gap in the middle of two blades, and the oil smoke of flue can flow backward from this gap and get into the kitchen, produces the peculiar smell.

Disclosure of Invention

The utility model aims to provide a check valve and a range hood, so as to solve the technical problem that the blades of the existing check valve and the inner wall of the check valve have gaps, and flue gas in a flue easily flows back into a room from the gaps.

In a first aspect, the present utility model provides a check valve comprising: a valve body and a ball check member; the valve body comprises a first pipeline and a second pipeline; the first pipeline extends vertically; one end of the second pipeline is communicated with the side wall of the first pipeline, and the second pipeline is inclined from bottom to top in a direction away from the first pipeline;

the ball-shaped non-return part is positioned at the junction of the first pipeline and the second pipeline; the diameter of the spherical check component is larger than that of the first pipeline and smaller than or equal to that of the second pipeline;

a guide structure is arranged in the first pipeline and used for guiding the spherical check component below the guide structure to enter the second pipeline; the ball-shaped check part is positioned in the first pipeline and is contacted with the inner wall of the first pipeline to block the first pipeline; in the working state, the ball check part is positioned in the second pipeline, and the first pipeline is in a conducting state.

Further, the guide structure comprises a guide cambered surface arranged on the inner wall of the first pipeline, and the extending direction of the upper end of the guide cambered surface faces the inlet of the second pipeline.

Further, the guide structure comprises a net body, the net body is connected with the inner wall of the first pipeline, the net body comprises a first side and a second side which are opposite, the first side is close to the side where the second pipeline is located, the second side is far away from the side where the second pipeline is located, and in the vertical direction, the first side is higher than the second side.

Further, the net body is in an arc shape.

Further, the side wall of the first pipeline is provided with an annular supporting surface protruding outwards, the cross section of the supporting surface is in an arc shape, and the supporting surface is used for supporting the spherical check component in a non-working state;

the ball-shaped non-return part in the non-working state is attached to the inner wall of the supporting surface.

Further, the end face of the second pipeline far away from the first pipeline is an arc surface, and the diameter of the arc surface is smaller than or equal to the diameter of the spherical check component.

Further, a filter screen is arranged in the first pipeline and is positioned below the junction of the first pipeline and the second pipeline.

Further, the side wall of the first pipeline is provided with an assembly port and an openable door body, and the door body is used for closing the assembly port;

the filter screen is detachably assembled on the inner wall of the first pipeline through the assembly port.

Further, the value range of the included angle alpha formed by the length direction of the second pipeline and the length direction of the first pipeline is as follows: 45 DEG < alpha < 75 deg.

In a second aspect, the utility model provides a range hood, which comprises the check valve.

The utility model has at least the following advantages or beneficial effects:

the check valve provided by the utility model comprises: a valve body and a ball check member; the valve body comprises a first pipeline and a second pipeline; the first pipeline extends vertically; one end of the second pipeline is communicated with the side wall of the first pipeline, and the second pipeline is inclined from bottom to top in a direction away from the first pipeline; the ball-shaped non-return part is positioned at the junction of the first pipeline and the second pipeline; the diameter of the spherical check component is larger than that of the first pipeline and smaller than or equal to that of the second pipeline; a guide structure is arranged in the first pipeline and used for guiding the spherical check component below the guide structure to enter the second pipeline; the ball-shaped check part is positioned in the first pipeline and is contacted with the inner wall of the first pipeline to block the first pipeline; in the working state, the ball check part is positioned in the second pipeline, and the first pipeline is in a conducting state.

When the range hood is in a non-working state, namely no smoke flows in the first pipeline, the spherical check component is positioned in the first pipeline, the side wall of the spherical check component is in contact with the inner wall of the first pipeline to form a seal, smoke flowing back into the check valve from top to bottom in the public flue is prevented from passing through the first pipeline, and the greater the pressure of the smoke in the public flue is, the greater the extrusion force between the spherical check component and the inner wall of the first pipeline is, so that the sealing effect is better; when the range hood is in a working state, namely, smoke flows into the first pipeline from bottom to top, under the lifting of the smoke, the spherical check component moves upwards and enters into the second pipeline under the guidance of the guide structure, so that the first pipeline is conducted. The check valve that this scheme provided can handle the high-flow and flow the back-flowing flue gas, and the back-flowing pressure of public flue is bigger, and the sealed effect is more obvious.

The range hood provided by the utility model comprises the check valve, and the range hood provided by the utility model has the advantage of the check valve because the check valve is cited by the range hood provided by the utility model.

Drawings

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

FIG. 1 is a schematic view of a check valve according to embodiment 1 of the present utility model in an operating state;

FIG. 2 is a schematic view of the non-working state of the check valve according to embodiment 1 of the present utility model;

FIG. 3 is a schematic view of the check valve according to embodiment 2 of the present utility model in an operating state;

FIG. 4 is a schematic view of the non-working state of the check valve according to embodiment 2 of the present utility model;

fig. 5 is a schematic view of the check valve according to embodiment 3 of the present utility model in an operating state.

Icon: 1-a valve body; 11-a first pipe; 111-a support surface; 112-guiding cambered surface; 12-a second conduit;

2-ball check member;

3-net body;

4-a filter screen.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. 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.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.

Example 1

As shown in fig. 1 and 2, the check valve provided by the utility model can be installed on the top of a range hood.

The check valve comprises a valve body 1 and a ball-shaped check part 2, wherein the valve body 1 is connected with the top plate of the range hood.

The valve body 1 comprises a first pipeline 11, the first pipeline 11 extends vertically, and after the range hood is started, flue gas passes through the first pipeline 11 from bottom to top.

The valve body 1 comprises a second pipeline 12, one end of the second pipeline 12 is communicated with the side wall of the first pipeline 11, the second pipeline 12 is inclined from bottom to top in a direction away from the first pipeline 11, and the first pipeline 11 and the second pipeline 12 are combined to be approximately Y-shaped.

The ball check member 2 is located at the junction of the first pipe 11 and the second pipe 12, the diameter of the ball check member 2 is larger than that of the first pipe 11 and smaller than or equal to that of the second pipe 12, therefore, the ball check member 2 cannot fall from the first pipe 11, the pipe wall of the first pipe 11 supports the ball check member 2 and is fully contacted with the ball check member 2 to form a seal, the ball check member 2 can enter the second pipe 12 under the guidance of the guiding structure after being lifted by the flue gas, and the ball check member 2 can fall back into the first pipe 11 after losing the pushing force of the flue gas.

Specifically, when the range hood is in a non-working state, i.e. no smoke flows in the first pipeline 11, the spherical check part 2 is positioned in the first pipeline 11, the side wall of the spherical check part 2 is in contact with the inner wall of the first pipeline 11 to form a seal, smoke flowing back into the check valve from top to bottom in the public flue is prevented from passing through the first pipeline 11, and the larger the pressure of the smoke in the public flue is, the larger the extrusion force between the spherical check part 2 and the inner wall of the first pipeline 11 is, so that the sealing effect is better; when the range hood is in a working state, namely, the smoke flows into the first pipeline 11 from bottom to top, under the lifting of the smoke, the spherical check part 2 moves upwards and enters the second pipeline 12 under the guidance of the guide structure, so that the first pipeline 11 is conducted, and the second pipeline 12 is obliquely arranged relative to the first pipeline 11, so that after the range hood stops working, the spherical check part 2 losing the smoke support returns into the first pipeline 11 under the action of gravity, and the first pipeline 11 is plugged again. The check valve that this scheme provided can handle the high-flow and flow the back-flowing flue gas, and the back-flowing pressure of public flue is bigger, and the sealed effect is more obvious.

In this embodiment, the guiding structure forms a guiding cambered surface 112 by a part of the cambered inner wall of the first pipe 11, and when the ball-shaped non-return part 2 leaves the supporting surface 111, the ball-shaped non-return part 2 is guided by the guiding cambered surface 112 to move to the side of the second pipe 12, and because the diameter of the first pipe 11 is smaller, the ball-shaped non-return part 2 cannot move upwards to enter the upper half part of the first pipe 11.

In one possible embodiment, the side wall of the first pipe 11 has an annular supporting surface 111 protruding outward, the cross-sectional shape of the supporting surface 111 is an arc, and the supporting surface 111 is used for supporting the ball-shaped non-return member 2 in the non-working state; the ball check member 2 in the non-operating state is fitted to the inner wall of the support surface 111.

The support surface 111 is located at the intersection of the first conduit 11 and the second conduit 12, i.e. where the first conduit 11 is in contact with the ball check member 2 when the ball check member 2 is in the rest state. The supporting surface 111 surrounds the circumference of the first pipeline 11, the cross section of the supporting surface is arc-shaped, the supporting surface is better attached to the outer wall of the spherical check part 2, the contact area between the first pipeline 11 and the spherical check part 2 is increased, and therefore the sealing effect is improved.

The guide cambered surface 112 is positioned above the supporting surface 111, and the guide cambered surface 112 and the supporting surface 111 are in smooth transition. When the ball check member 2 in the non-operating state is lifted by the smoke, it can be sequentially introduced into the second pipe 12 along the guide arc surface 112.

In one embodiment, the end surface of the second pipe 12 away from the first pipe 11 is an arc surface, and the diameter of the arc surface is equal to or smaller than the diameter of the ball check member 2.

When the ball check member 2 completely enters the second pipe 12 and abuts against the end surface of the second pipe 12 away from the first pipe 11, since the end surface is provided as an arc surface matching with the ball check member 2, it is possible to achieve sufficient contact of the ball check member 2 with the end surface, and it is possible to prevent smoke from flowing between the end surface and the ball check member 2, resulting in rattling of the ball check member 2 to generate noise.

As shown in fig. 1, in one possible embodiment, the first duct 11 is internally provided with a filter screen 4, the filter screen 4 being located below the junction of the first duct 11 and the second duct 12.

The filter screen 4 that sets up in the first pipeline 11 can filter the flue gas that flows from bottom to top, makes a part greasy dirt adhere to on filter screen 4, and then reduces the oily net that adheres to on the ball check part 2, can prolong the life cycle of this check valve greatly.

Further, the side wall of the first pipeline 11 is provided with an assembly port and an openable door body, and the door body is used for closing the assembly port; the filter screen 4 is detachably assembled on the inner wall of the first pipeline 11 through an assembly port. By opening the fitting opening, the filter screen 4 can be taken out and cleaned.

The included angle alpha formed by the length direction of the second pipeline 12 and the length direction of the first pipeline 11 has the following range: 45 deg. < alpha < 75 deg., so that the spherical non-return element 2 lifted by the flue gas can be quickly returned to the first pipe 11.

Example 2

As shown in fig. 3 and 4, in this embodiment, the guiding structure includes a net body 3, and the net body 3 includes opposite first and second sides, the first side is close to the side of the second pipe 12, the second side is far away from the side of the second pipe 12, and the first side is higher than the second side in the vertical direction.

In order to improve the sliding flow of the ball check member 2, the net body 3 may be in the shape of an arc. The net body 3 has a high side and a low side, so that the ball-shaped non-return part 2 below the net body is guided to slide into the second pipeline 12 from top to bottom in an arc line, and the movement of the ball-shaped non-return part 2 is smooth and fluent. Further, since the mesh holes for passing the smoke are formed in the mesh body 3, the mesh body 3 does not cause excessive obstruction to the smoke. And the net body 3 can also play a role in smoke filtration.

Example 3

As shown in fig. 5, in the embodiment, the guiding structure includes both the guiding cambered surface 112 and the net body 3 according to the embodiment 1 and the embodiment 2.

The guide cambered surface 112 is positioned above the supporting surface 111; the lower end of the net body 3 is connected with the upper end of the guide cambered surface 112, and the net body 3 and the guide cambered surface 112 are in smooth transition. The first side of the net body 3 may smoothly transition with the upper position of the second pipe 12, and the second side may smoothly transition with the upper end of the guide curved surface 112, thereby further improving the movement smoothness of the ball-shaped non-return member 2.

The guide cambered surface 112 and the net body 3 are in smooth transition, when the non-working spherical check part 2 is lifted by smoke, the non-working spherical check part can sequentially enter the second pipeline 12 along the guide cambered surface 112 and the net body 3, and the guide cambered surface 112 can play a role in guiding and buffering.

The range hood provided by the utility model comprises the check valve, and the range hood provided by the utility model has the advantage of the check valve because the check valve is cited by the range hood provided by the utility model.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A check valve, comprising: a valve body (1) and a ball check member (2); the valve body (1) comprises a first pipeline (11) and a second pipeline (12); the first pipe (11) extends vertically; one end of the second pipeline (12) is communicated with the side wall of the first pipeline (11), and the second pipeline (12) is inclined in a direction away from the first pipeline (11) from bottom to top;

the ball-shaped non-return part (2) is located at the junction of the first pipe (11) and the second pipe (12); the diameter of the ball-shaped non-return part (2) is larger than the diameter of the first pipeline (11) and smaller than or equal to the diameter of the second pipeline (12);

a guide structure is arranged in the first pipeline (11) and used for guiding the spherical check component (2) below the guide structure to enter the second pipeline (12); the ball-shaped check component (2) has an operating state and a non-operating state, and in the non-operating state, the ball-shaped check component (2) is positioned in the first pipeline (11) and is contacted with the inner wall of the first pipeline (11) to block the first pipeline (11); in the working state, the ball-shaped non-return part (2) is positioned in the second pipeline (12), and the first pipeline (11) is in a conducting state.

2. The non-return valve according to claim 1, wherein the guiding structure comprises a guiding cambered surface (112) provided on the inner wall of the first conduit (11), the upper end of the guiding cambered surface (112) extending in a direction towards the inlet of the second conduit (12).

3. A non-return valve according to claim 1 or 2, characterized in that the guiding structure comprises a mesh body (3), the mesh body (3) being connected to the inner wall of the first conduit (11), the mesh body (3) comprising opposite first and second sides, the first side being close to the side of the second conduit (12), the second side being remote from the side of the second conduit (12) and being vertically higher than the first side.

4. A check valve according to claim 3, characterized in that the mesh body (3) is circular arc shaped.

5. A non-return valve according to claim 1, characterized in that the side wall of the first pipe (11) has an annular supporting surface (111) protruding outwards, the cross-sectional shape of the supporting surface (111) being circular arc, the supporting surface (111) being intended to support the ball-shaped non-return member (2) in the inactive state;

the ball-shaped non-return part (2) in the non-working state is attached to the inner wall of the supporting surface (111).

6. A check valve according to claim 1, characterized in that the end surface of the second pipe (12) remote from the first pipe (11) is an arc surface, and the diameter of the arc surface is smaller than or equal to the diameter of the ball-shaped check member (2).

7. A non-return valve according to any one of claims 4-6, characterized in that a filter screen (4) is provided inside the first conduit (11), the filter screen (4) being located below the junction of the first conduit (11) and the second conduit (12).

8. The non-return valve according to claim 7, wherein the first conduit (11) has a fitting opening and an openable door for closing the fitting opening on a side wall;

the filter screen (4) is detachably assembled on the inner wall of the first pipeline (11) through the assembly port.

9. The non-return valve according to any one of claims 4-6, wherein the included angle α formed by the length direction of the second pipe (12) and the length direction of the first pipe (11) is in the range of: 45 DEG < alpha < 75 deg.

10. A range hood comprising a check valve according to any one of claims 1 to 9.