CN111706680B - Check valve and range hood - Google Patents

Check valve and range hood Download PDF

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Publication number
CN111706680B
CN111706680B CN202010579668.1A CN202010579668A CN111706680B CN 111706680 B CN111706680 B CN 111706680B CN 202010579668 A CN202010579668 A CN 202010579668A CN 111706680 B CN111706680 B CN 111706680B
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China
Prior art keywords
protrusion
valve plate
valve
lowest point
range hood
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CN202010579668.1A
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Chinese (zh)
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CN111706680A (en
Inventor
李佳阳
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Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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Priority to CN202010579668.1A priority Critical patent/CN111706680B/en
Publication of CN111706680A publication Critical patent/CN111706680A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2021—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member with a plurality of valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)

Abstract

The invention discloses a check valve and a range hood. The check valve includes a base and a valve plate. The valve plate can be rotatably installed in the base. The valve plate is provided with at least one protrusion formed downward. The height of the bump varies monotonically from the bump edge to the lowest point of the bump. According to the check valve provided by the embodiment of the invention, the valve plate is provided with at least one protrusion formed downwards, and the height of the protrusion is monotonously changed from the protrusion edge to the lowest point of the protrusion, so that oil dirt accumulated on the valve plate can flow to the lowest point of the protrusion, the lowest point of the protrusion promotes the dropping of the oil dirt, the performance attenuation of the range hood caused by the valve plate can be delayed, the opening torque of the valve plate after the range hood runs for a long time can be permanently reduced, the occurrence of the incomplete opening condition of the valve plate is reduced, and the running condition of the range hood is improved.

Description

Check valve and range hood
Technical Field
The invention relates to the technical field of household appliances, in particular to a check valve and a range hood.
Background
Currently, a range hood is an electrical appliance that collects and discharges oil smoke generated during cooking by using a fan. In the working process of the range hood, grease particles and impurities in the fume gas are continuously condensed in the inner part of the range hood and each part of a rear end flue under the action of condensation, and are changed into greasy dirt of colloid along with time migration, and the grease particles and the impurities have a fixed shape, so that the performance of the range hood is influenced, including but not limited to air quantity attenuation, corresponding delay in starting, abnormal sound and the like.
In order to prevent the oil smoke from flowing backward, the range hood is usually provided with a check valve at the joint of the air outlet and the external smoke tube. After the range hood runs for a long time, oil stains can be accumulated in the central area of the valve plate far away from the rotating shaft of the check valve plate, and the valve plate is in a water drop shape. The structure can interfere high-speed airflow discharged by the volute, increase the running resistance of the whole machine, and simultaneously increase the opening torque required by opening the valve plate, so that the valve plate is slowly opened or incompletely opened, and the running of a fan system is influenced.
Disclosure of Invention
The embodiment of the invention provides a check valve and a range hood.
The check valve of the embodiment of the invention is used for a range hood, and comprises:
a base; and
the valve plate can be rotatably installed in the base, at least one protrusion formed downwards is arranged on the valve plate, and the height of the protrusion is monotonically changed from the protrusion edge to the lowest point of the protrusion.
According to the check valve provided by the embodiment of the invention, the valve plate is provided with at least one protrusion formed downwards, and the height of the protrusion is monotonously changed from the protrusion edge to the lowest point of the protrusion, so that oil dirt accumulated on the valve plate can flow to the lowest point of the protrusion, the lowest point of the protrusion promotes the dropping of the oil dirt, the performance attenuation of the range hood caused by the valve plate can be delayed, the opening torque of the valve plate after the range hood runs for a long time can be permanently reduced, the occurrence of the incomplete opening condition of the valve plate is reduced, and the running condition of the range hood is improved.
In some embodiments, the number of the valve plates is two, the two valve plates rotate along the same rotation axis, the two valve plates are symmetrically arranged along the rotation axis, and each valve plate is provided with at least one protrusion.
So, increase smoke exhaust effect, and every valve block can both guide the greasy dirt to assemble to protruding minimum point department and drip.
In some embodiments, the two valve plates are connected to form a circular plane, and the distance between the lowest point of the protrusion and the center of the circle is not more than 50% of the radius of the valve plates.
Therefore, the gravity center of the valve plate is close to the rotating shaft, and the opening moment of the valve plate is reduced.
In some embodiments, the lowest point of the protrusion is located no more than 25% of the radius of the valve plate from the center of the circle.
Therefore, the opening torque of the valve plate is further reduced, and the smoke exhaust effect of the range hood is improved.
In some embodiments, the two valve sheets are connected to form a plane having a circular shape, and the lowest point of the protrusion is deviated from the symmetry axis of the valve sheet by not more than 50% of the radius of the valve sheet.
Therefore, oil stains on the convex curved surface can be uniformly distributed on two sides of the symmetry axis of the valve plate and converged to the lowest point to be dripped.
In some embodiments, the lowest point of the protrusion is located on the symmetry axis of the valve plate.
Therefore, oil stains on the convex curved surface can be uniformly distributed on two sides of the symmetry axis of the valve plate and are converged to the lowest point to be dripped.
In some embodiments, a line connecting the lowest point of the protrusion and any point on the edge of the protrusion forms an angle of not less than 2 degrees with the horizontal direction.
In this way, the oil stains in different positions can flow to the lowest point against their surface tension and drip off.
In some embodiments, a line connecting the lowest point of the protrusion and any point on the edge of the protrusion forms an angle with the horizontal direction that is greater than 7 degrees.
In this way, oil stains in different locations more easily flow to the lowest point against their surface tension and drip off.
In certain embodiments, the lowest point of the protrusion is a sharp point.
Thus, the oil stains are easier to drip after being gathered at the lowest point.
The range hood of the embodiment of the invention comprises:
the top of the box body is provided with a smoke outlet; and
the check valve of any of the above embodiments, said check valve being disposed at said smoke exhaust port.
According to the range hood provided by the embodiment of the invention, the valve plate is provided with at least one protrusion formed downwards, and the height of the protrusion is monotonously changed from the protrusion edge to the lowest point of the protrusion, so that oil dirt accumulated on the valve plate can flow to the lowest point of the protrusion, the lowest point of the protrusion promotes the dropping of the oil dirt, the performance attenuation of the range hood caused by the valve plate can be delayed, the opening torque of the valve plate after the range hood runs for a long time can be permanently reduced, the occurrence of the incomplete opening condition of the valve plate is reduced, and the running condition of the range hood is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a check valve according to an embodiment of the present invention;
FIG. 2 is a structural view of a valve plate of the check valve according to the embodiment of the present invention;
FIG. 3 is a plan view of a valve plate of the check valve according to the embodiment of the present invention;
FIG. 4 is a cross-sectional view of a valve plate of the check valve according to the embodiment of the present invention;
fig. 5 is a three-dimensional structural view of a range hood according to an embodiment of the present invention;
fig. 6 is an exploded structural view of the range hood according to the embodiment of the present invention.
Description of the main element symbols:
the range hood comprises a range hood 100, a check valve 10, a base 12, a valve plate 14, a protrusion 15, a rotating shaft 16, a box body 20 and a smoke exhaust port 22.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The disclosure herein provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 to 4, a check valve 10 according to an embodiment of the present invention is used in a range hood 100, and the check valve 10 includes a base 12 and a valve plate 14. Valve sheet 14 is rotatably mounted within base 12. The valve sheet 14 is provided with at least one protrusion 15 formed downward. The height of the projection 15 varies monotonically from the edge of the projection 15 to the lowest point Q of the projection 15.
In the check valve 10 of the embodiment of the invention, the valve plate 14 is provided with at least one protrusion 15 formed downwards, and the height of the protrusion 15 is monotonously changed from the edge of the protrusion 15 to the lowest point Q of the protrusion 15, so that oil dirt accumulated on the valve plate 14 can flow to the lowest point Q of the protrusion 15, the lowest point Q of the protrusion 15 promotes the oil dirt to drip, the performance attenuation of the range hood 100 caused by the valve plate 14 can be delayed, the opening moment of the valve plate 14 after the range hood 100 runs for a long time can be permanently reduced, the occurrence of the incomplete opening condition of the valve plate 14 is reduced, and the running condition of the range hood 100 is improved.
It can be understood that, in the related art, the valve plate generally has a planar structure, and the valve plate has a planar profiling, and the material of the valve plate is metal or injection molding material. When the valve plate is of a plane structure, after the range hood runs for a long time, water drop-shaped oil stains can be accumulated in the central area of the valve plate far away from the rotating shaft of the valve plate, so that the opening torque of the valve plate is increased, and the running of the range hood is influenced.
In the embodiment of the present invention, please refer to fig. 1, wherein a dotted line with an arrow indicates a flowing direction of the oil stain, the valve plate 14 is changed into a shape with a three-dimensional structure by adding at least one downward protrusion 15 on the valve plate 14, and the oil stain which is not yet formed into a gel shape is guided and gathered, so that the oil stain is dripped by overcoming the surface tension of the oil stain itself, and the gathering speed of the oil stain on the valve plate 14 is reduced. Meanwhile, the design of the lowest point Q guides the condensed oil convergence position, the opening moment of the valve plate 14 after long-term use is reduced, the opening angle of the valve plate 14 after long-term use is increased, and the running performance of the range hood 100 is improved.
Specifically, valve sheet 14 is mounted in base 12 via a rotating shaft 16, and valve sheet 14 can be opened and closed around rotating shaft 16. When the extractor hood 100 is in a working state, the valve plate 14 is opened upward by a certain angle under the action of the lower airflow to open the flue in the base 12, and the oil smoke can pass through the check valve 10 and be discharged to the outside; under the condition that the range hood 100 is in a non-working state, the valve plate 14 is closed downwards under the action of self gravity and is kept in a horizontal position to close a flue in the base 12, so that outdoor oil smoke is prevented from entering a room through the check valve 10. It is understood that in other embodiments, the opening and closing of the valve plate 14 can be achieved by an electric driving element, for example, when the range hood 100 is in operation, the electric driving element can drive the valve plate 14 to open, and when the range hood 100 is closed, the electric driving element can drive the valve plate 14 to close. The weight of the valve plate 14 can be reduced due to the arrangement of the protrusions 15, so that the electric driving piece can drive the valve plate 14 to rotate more easily, and the service life of the electric driving piece is ensured. The electric drive may be a motor, a solenoid valve, or the like.
The protrusions 15 can be obtained by different processes or methods according to the material of the valve sheet 14. For example, when the material of the valve plate 14 is a metal plate, the downward protrusion 15 can be made by pressing; when the material of valve plate 14 is injection molding material, protrusion 15 can be formed by injection molding using a mold. In the example of fig. 2, the valve plate 14 is made of a metal plate, and the downward protrusions 15 are formed by pressing. The height of the protrusion 15 changes monotonically from the edge of the protrusion 15 to the lowest point Q of the protrusion 15, it can be understood that a connection line between any point on the edge of the protrusion 15 and the lowest point Q of the protrusion 15 is located on the surface of the protrusion 15 and is a straight line, and the height of the protrusion 15 gradually increases and changes monotonically along the direction of the connection line from any point on the edge of the protrusion 15 to the lowest point Q of the protrusion 15, that is, along the direction of the connection line from any point on the edge of the protrusion 15 to the lowest point Q of the protrusion 15, the height of the protrusion 15 is not negligibly changed, thereby ensuring that the oil stains at different positions are gathered to the lowest point Q and drip. In some embodiments, the protrusion 15 has a triangular cone structure, that is, the protrusion 15 is formed by intersecting three slopes two by two, each two slopes intersect with one slope, the three slopes intersect with each other two by two to form three slopes, one end of the three slopes intersects with the lowest point Q of the protrusion 15, and the other end of the three slopes extends to the edge of the protrusion 15. In some embodiments, the protrusions 15 may have a conical configuration.
In one embodiment, the protrusion 15 and the valve plate 14 may be an integral structure, for example, the protrusion 15 may be formed by pressing the valve plate 14, in another embodiment, the protrusion 15 and the valve plate 14 may be a separate structure, and the protrusion 15 is fixed on the valve plate 14 by welding or the like.
Referring to fig. 2, in some embodiments, the number of valve plates 14 is two. The two valve plates 14 rotate along the same rotation axis A, and the two valve plates 14 are symmetrically arranged along the rotation axis A. Each valve plate 14 is provided with at least one protrusion 15.
So, increase smoke exhaust effect, and every valve block 14 can both guide the greasy dirt to assemble to 15 the minimum Q departments of arch and drip. It can be understood that under the condition that valve block 14 is two, every valve block 14 self weight is less, and the opening moment of every valve block 14 is less, and every valve block 14 can expand bigger angle when discharging fume to increase smoke discharging effect.
Specifically, in the embodiment shown in fig. 3, the planar shape formed by connecting the two valve sheets 14 is circular, that is, the planar shape of each valve sheet 14 is semicircular. The distance m between the lowest point Q of the bulge 15 and the circle center O of the circle is not more than 50% of the radius r of the valve plate 14.
Thus, the center of gravity of the valve sheet 14 is close to the rotation shaft 16, reducing the opening torque of the valve sheet 14. It can be understood that the rotating shaft 16 is located at the diameter of the valve sheet 14, and the two valve sheets 14 can perform opening and closing movements around the rotating shaft 16. When the lowest point Q of the protrusion 15 is close to the edge of the valve plate 14, namely the distance m between the projection of the lowest point Q of the protrusion 15 on the horizontal plane and the circle center O of the valve plate 14 is close to the radius r of the valve plate 14, the opening moment of the valve plate 14 is large; when the lowest point Q of the protrusion 15 is close to the center O of the valve sheet 14, that is, the distance m between the projection of the lowest point Q of the protrusion 15 on the horizontal plane and the center O of the valve sheet 14 is smaller than the radius r of the valve sheet 14, the opening moment of the valve sheet 14 is smaller. Under the condition that the smoke discharge amount is certain, the smaller the opening torque of the valve plate 14 is, the larger the opening angle of the valve plate 14 is, and the better the smoke discharge effect of the range hood 100 is. Specifically, the distance m between the lowest point Q of the protrusion 15 and the center O of the valve sheet 14 may be 10%, 20%, 30%, 40%, or other values between 0% and 50% of the radius r of the valve sheet 14. Preferably, in the embodiment shown in fig. 3, the distance m from the lowest point Q of the protrusion 15 to the center O of the circle is not more than 25% of the radius r of the valve sheet 14. Thus, the opening torque of the valve plate 14 is further reduced, and the smoke exhausting effect of the range hood 100 is improved.
Referring to fig. 4, in the embodiment shown in fig. 4, each valve plate 14 is formed with a protrusion 15 downward. It is understood that in other embodiments, the number of the protrusions 15 formed downward of each valve sheet 14 may be two or more than two. Preferably, the number of the protrusions 15 is one, and the orthographic projection of the protrusion 15 on the valve plate 14 is basically overlapped with the valve plate 14, so that all the oil stains on the valve plate 14 are converged to the lowest point Q of one protrusion 15, and the oil stains are made to drip, thereby ensuring the long-term operation performance of the range hood 100. It should be noted that, in other embodiments, the number of the valve sheets 14 may be one or more than two, and a planar shape formed by connecting one valve sheet 14 or more than two valve sheets 14 includes an ellipse, a rectangle, or an asymmetric shape, for these valve sheets 14, the lowest point Q of the protrusion 15 still satisfies that the lowest point Q is close to the rotating shaft 16 but keeps a certain distance m, and the specific position parameter needs to be determined according to the configuration of the valve sheet 14.
In some embodiments, the planar shape formed by joining two valve sheets 14 is circular. The deviation n of the lowest point Q of the projection 15 from the axis of symmetry C of the valve plate 14 is not more than 50% of the radius r of the valve plate 14.
Therefore, oil stains on the surface of the protrusion 15 can be uniformly distributed on two sides of the symmetry axis C of the valve plate 14 and converged to the lowest point Q to be dropped.
Specifically, referring to fig. 3, the planar shape of each valve plate 14 is semicircular, and it can be understood that a symmetry axis C exists in the planar shape of each valve plate 14, the valve plates 14 are symmetrical about the symmetry axis C in a horizontal plane, the smaller the deviation n between the lowest point Q and the symmetry axis C is, the closer the surfaces of the protrusions 15 are to the symmetrical distribution, the closer the areas on the two sides of the surfaces of the protrusions 15 are, and the more uniform the oil stain distribution is. Specifically, the deviation n between the lowest point Q of the protrusion 15 and the symmetry axis C of the valve sheet 14 may be 10%, 20%, 30%, 40%, or other values between 0-50% of the radius r of the valve sheet 14. Preferably, the lowest point Q of the protrusion 15 is located on the symmetry axis C of the valve sheet 14, i.e. the deviation n of the lowest point Q of the protrusion 15 from the symmetry axis C of the valve sheet 14 is 0. Therefore, oil stains on the surface of the protrusion 15 can be uniformly distributed on two sides of the symmetry axis C of the valve plate 14 and converged to the lowest point Q to be dropped.
It should be noted that, in other embodiments, in the case that the planar shape formed by connecting one valve sheet 14 or more than two valve sheets 14 is an ellipse, a rectangle or an asymmetric shape, the lowest point Q of the protrusion 15 still satisfies that the lowest point Q is close to or located on the symmetry axis C of the valve sheet 14, and the specific position parameter needs to be determined according to the configuration of the valve sheet 14.
Referring to fig. 4, in some embodiments, an angle S between a line connecting the lowest point Q of the protrusion 15 and any point on the edge of the protrusion 15 and the horizontal direction is not less than 2 degrees.
In this way, the oil stains at different positions can flow to the lowest point Q against the surface tension of the oil stains and drip.
It can be understood that after encountering the valve plate 14, the rising oil smoke is liquefied into oil drops and attached to the valve plate 14, the valve plate 14 is provided with a protrusion 15 formed downwards, the surface of the protrusion 15 inclines downwards at a certain angle, and the oil drops can flow by overcoming the surface tension and are converged and dropped at the lowest point Q.
Specifically, referring to fig. 4, an included angle S between a line connecting the lowest point Q of the protrusion 15 and any point on the edge of the protrusion 15 and the horizontal direction is not less than 2 degrees. It is understood that in the case where the included angle S is not less than 2 degrees, for example, the included angle S may be 2 degrees, 3.5 degrees, 4 degrees, or other degrees not less than 2 degrees. The oil stain on the valve plate 14 can overcome the surface tension of the valve plate to flow and gather at the lowest point Q to drip, so that the opening torque of the valve plate 14 after long-term use is reduced, the opening angle of the valve plate 14 after long-term use is increased, and the running performance of the range hood 100 is improved or kept. Preferably, an included angle S between a line connecting the lowest point Q of the protrusion 15 and any point on the edge of the protrusion 15 and the horizontal direction is greater than 7 degrees, for example, the included angle S may be 8 degrees, 9.5 degrees, 10 degrees, or other degrees greater than 7 degrees. In this way, the oil stains in different positions can more easily flow to the lowest point Q against the surface tension of the oil stains and drip.
It should be noted that, in other embodiments, the number of the valve plates 14 may be one or more than two, a planar shape formed by connecting one valve plate 14 or more than two valve plates 14 includes an ellipse, a rectangle or an asymmetric shape, for these valve plates 14, the lowest point Q of the protrusion 15 still satisfies that an included angle S between a connecting line between the lowest point Q of the protrusion 15 and any point on the edge of the protrusion 15 and the horizontal direction is not less than a set value, and specific angle parameters need to be determined according to the configuration of the valve plate 14.
Referring to fig. 4, in some embodiments, the lowest point Q of the protrusion 15 is a sharp point.
Thus, oil stains are easier to drip after being gathered at the lowest point Q. It can be understood that the greasy dirt that is in different positions flows to protruding 15's the minimum Q, and the sharp-pointed point helps converging of greasy dirt to merge, and simultaneously, the contact area of sharp-pointed point department greasy dirt and valve block 14 is little, and the adhesive force of greasy dirt reduces, and the greasy dirt drips more easily.
Specifically, the protrusion 15 may be cut out with a cross section, which may intersect the protrusion 15 at a point or a line, in any case where the cross section passes through the lowest point Q and intersects the protrusion 15 at the line, the line of the protrusion 15 is V-shaped, the closed end of the V-shape is the lowest point Q, the open end of the V-shape is the edge of the protrusion 15, and the line of the protrusion 15 is non-conductive at the closed end of the V-shape, i.e., the line of the protrusion 15 is non-conductive at the lowest point Q in any cross-sectional direction. In one example, the downward protrusion 15 of the valve plate 14 has a triangular cone structure, the lowest point Q of the protrusion 15 is the apex of the triangular cone, and the section line of the protrusion 15 is not conductive at the apex of the triangular cone in any cross-sectional direction. It is understood that in other embodiments, the lowest point Q of the protrusion 15 may be a non-sharp point.
Referring to fig. 5 and 6, a range hood 100 according to an embodiment of the present invention includes a box 20 and a check valve 10. The top of the box body 20 is provided with a smoke outlet 22. The check valve 10 is provided at the smoke exhaust port 22.
According to the range hood 100 provided by the embodiment of the invention, the valve plate 14 is provided with at least one protrusion 15 which is formed downwards, and the height of the protrusion 15 is monotonously changed from the edge of the protrusion 15 to the lowest point Q of the protrusion 15, so that oil stain accumulated on the valve plate 14 can flow to the lowest point Q of the protrusion 15, and the lowest point Q of the protrusion 15 promotes oil stain to drip, so that the performance attenuation of the range hood 100 caused by the valve plate 14 can be delayed, the opening torque of the valve plate 14 after the range hood 100 runs for a long time can be permanently reduced, the occurrence of the incomplete opening condition of the valve plate 14 is reduced, and the running condition of the range hood 100 is improved.
It can be understood that, in the operation process of the range hood 100, indoor oil smoke enters the box body 20 of the range hood 100, at the smoke exhaust port 22 at the top of the box body 20, the air flow blows the valve plate 14 of the check valve 10, the valve plate 14 rotates around the rotating shaft 16, the valve plate 14 is opened at a certain angle, and the oil smoke inside the box body 20 can pass through the check valve 10 and be exhausted to the outside. After the range hood 100 is finished operating, the valve plate 14 can close around the rotating shaft 16 by gravity and finally stay at a horizontal position, so as to prevent outdoor oil smoke from entering the room through the smoke outlet 22. Under the condition that the valve plate 14 is closed and positioned at the horizontal position, the oil stain condensed on the surface of the valve plate 14 overcomes the surface tension of the oil stain per se, flows to the lowest point Q along the surface of the protrusion 15 and finally converges at the lowest point Q to drip, so that the oil stain is prevented from being attached to the surface of the valve plate 14, the opening torque of the valve plate 14 is increased, and the performance of the range hood 100 is attenuated.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", 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 invention. In this specification, schematic representations of the above terms do not necessarily refer 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.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A check valve for a range hood, the check valve comprising:
a base; and
the valve plate can be rotatably arranged in the base and is provided with at least one protrusion formed downwards, and the height of the protrusion is monotonously changed from the edge of the protrusion to the lowest point of the protrusion;
the number of the valve plates is two;
the planar shape formed by connecting the two valve plates is circular, and the distance between the lowest point of the bulge and the circle center of the circle is not more than 50% of the radius of the valve plates;
the deviation of the lowest point of the bulge and the symmetry axis of the valve plate is not more than 50% of the radius of the valve plate.
2. The check valve of claim 1, wherein the two valve plates rotate along a same rotation axis, the two valve plates are symmetrically arranged along the rotation axis, and each valve plate is provided with at least one protrusion.
3. The check valve of claim 1, wherein a lowest point of the protrusion is no more than 25% of the radius of the valve plate from the center of the circle.
4. The check valve of claim 1, wherein the lowest point of the protrusion is located on the axis of symmetry of the valve plate.
5. The check valve of claim 1, wherein a line connecting a lowest point of the protrusion and any point on the edge of the protrusion makes an angle of not less than 2 degrees with a horizontal direction.
6. The check valve of claim 5 wherein a line drawn between the lowest point of said protrusion and any point on the edge of said protrusion makes an angle with the horizontal greater than 7 degrees.
7. The check valve of claim 1, wherein the lowest point of the protrusion is a sharp point.
8. A range hood, comprising:
the top of the box body is provided with a smoke outlet; and
the check valve of any of claims 1-7, said check valve being disposed at said smoke exhaust.
CN202010579668.1A 2020-06-23 2020-06-23 Check valve and range hood Active CN111706680B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070087343A (en) * 2006-02-23 2007-08-28 김상만 Range hood
CN202432030U (en) * 2011-12-07 2012-09-12 美的集团有限公司 Check valve of range hood
CN205331517U (en) * 2016-01-12 2016-06-22 李鼎宏 Complete general butterfly wing range hood check valve
CN106051234A (en) * 2016-07-22 2016-10-26 宁波方太厨具有限公司 Single-valve-block check valve
CN208312505U (en) * 2018-06-19 2019-01-01 广东美的厨房电器制造有限公司 Cold plate and range hood for range hood
CN210568750U (en) * 2019-09-19 2020-05-19 珠海格力电器股份有限公司 Range hood and check valve assembly thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110513512A (en) * 2019-09-30 2019-11-29 秦先军 A kind of upstream exhaust smoke check valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070087343A (en) * 2006-02-23 2007-08-28 김상만 Range hood
CN202432030U (en) * 2011-12-07 2012-09-12 美的集团有限公司 Check valve of range hood
CN205331517U (en) * 2016-01-12 2016-06-22 李鼎宏 Complete general butterfly wing range hood check valve
CN106051234A (en) * 2016-07-22 2016-10-26 宁波方太厨具有限公司 Single-valve-block check valve
CN208312505U (en) * 2018-06-19 2019-01-01 广东美的厨房电器制造有限公司 Cold plate and range hood for range hood
CN210568750U (en) * 2019-09-19 2020-05-19 珠海格力电器股份有限公司 Range hood and check valve assembly thereof

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