CN108468838B

CN108468838B - Flue check valve and flue system with same

Info

Publication number: CN108468838B
Application number: CN201810258597.8A
Authority: CN
Inventors: 霍星凯; 蒋济武; 彭小康; 刘凡继; 季俊生
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2018-03-27
Filing date: 2018-03-27
Publication date: 2024-04-12
Anticipated expiration: 2038-03-27
Also published as: CN108468838A

Abstract

The invention discloses a flue check valve and a flue system with the same, wherein the flue check valve comprises: the valve body is provided with a smoke channel, and the smoke channel is provided with a smoke inlet and a smoke outlet; the check structure is arranged on the valve body and only allows fluid in the smoke channel to flow unidirectionally in the direction from the smoke inlet to the smoke outlet; the flow guiding structure is arranged on the valve body and guides fluid flowing out of the smoke outlet upwards. The flue check valve provided by the embodiment of the invention not only has the functions of backflow prevention and fire prevention, but also can reduce the smoke discharging resistance of an upper user to a lower user, thereby improving the smoke discharging efficiency.

Description

Flue check valve and flue system with same

Technical Field

The invention relates to the technical field of smoke discharge, in particular to a flue check valve and a flue system with the flue check valve.

Background

The public vertical smoke exhaust system is a ventilation and exhaust mode commonly used in the current residential kitchen, and the smoke generated by the cooking of residents is exhausted to a public flue through a range hood.

In the flue system 1 'shown in fig. 1, the range hood 10' in the kitchen is communicated with the common flue 40 'through the indoor smoke exhaust passage 20', and in order to prevent the backward flow of the oil smoke, a flue check valve 30 'is generally arranged between the common flue 40' and the indoor smoke exhaust passage 20', and the flue check valve 30' has a non-return structure. When the range hood 10' works, the airflow with the oil smoke pushes away the non-return structure through the indoor smoke discharging channel 20', and the oil smoke is discharged to the public flue 40'; when the range hood 10 'stops working, the non-return structure resets and seals by virtue of dead weight, preventing the oil smoke of the public flue 40' from flowing backward into the residential kitchen. The flue check valve 30' thus has anti-backflow and fireproof functions by the non-return structure.

However, as shown in fig. 1, when the range hood 10 'works, the non-return structure of the flue check valve 30' is opened, and the oil smoke is discharged to the common flue 40', and because the oil smoke is fluid and diffuses all around in an unconstrained state, part of the oil smoke flows to the lower side of the common flue 40', so that the smoke discharge resistance of the upper user to the lower user is increased, the smoke discharge resistance of different floors is unevenly distributed, and the smoke discharge efficiency is affected.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the flue check valve which not only has the functions of backflow prevention and fire prevention, but also can reduce the smoke discharging resistance of an upper user to a lower user, thereby improving the smoke discharging efficiency.

The invention also provides a flue system with the flue check valve.

An embodiment according to a first aspect of the invention proposes a flue check valve comprising: the valve body is provided with a smoke channel, and the smoke channel is provided with a smoke inlet and a smoke outlet; the check structure is arranged on the valve body and only allows fluid in the smoke channel to flow unidirectionally in the direction from the smoke inlet to the smoke outlet; the flow guiding structure is arranged on the valve body and guides fluid flowing out of the smoke outlet upwards.

The flue check valve provided by the embodiment of the invention not only has the functions of backflow prevention and fire prevention, but also can reduce the smoke discharging resistance of an upper user to a lower user, thereby improving the smoke discharging efficiency.

According to some embodiments of the invention, the non-return structure is disposed within the flue gas channel and adjacent to the flue gas inlet, and the flow guiding structure is disposed within the flue gas channel and adjacent to the flue gas outlet.

According to some embodiments of the invention, the flow guiding structure comprises: and the guide fins extend obliquely upwards in the direction from the flue gas inlet to the flue gas outlet.

Further, a part of the guide fin is arranged in the flue gas channel, and the other part of the guide fin extends out of the flue gas channel from the flue gas outlet.

Further, a portion of the guide fin extending out of the smoke passage is arranged flush with the valve body in the axial direction of the smoke outlet or exceeds the valve body.

Further, the guide fin has a maximum inclination angle alpha with respect to the horizontal direction of 0 DEG < alpha < 90 deg.

Further, the cross section of the guide fin is arc-shaped or linear.

Further, the flow guiding structure further comprises: the guide rib is arranged on the guide fin and extends upwards along with the guide fin in an inclined mode along the direction from the flue gas inlet to the flue gas outlet.

Further, the plurality of guide ribs are arranged in a direction orthogonal to the axial direction of the flue gas outlet.

Further, the guide fins are a plurality of and are arranged at intervals along the up-down direction.

Further, a plurality of the guide fins are provided at equal intervals in the up-down direction.

Further, the pitch of the plurality of guide fins gradually increases or gradually decreases in the up-down direction.

Further, the widths of the plurality of guide fins are equal to each other.

Further, the widths of the plurality of guide fins gradually increase or gradually decrease in the top-to-bottom direction.

Further, edges of the plurality of guide fins adjacent to the smoke inlet are flush in the axial direction of the smoke outlet, or can also exceed the valve body.

According to some embodiments of the invention, the valve body comprises: the smoke channel and the smoke inlet are formed in the first valve body, and the non-return structure is arranged in the first valve body; the fixed plate part is arranged on the first valve body, and the smoke outlet is formed in the fixed plate part; the second valve body is arranged on the fixing plate portion and around the smoke outlet, and the flow guide structure is arranged on the fixing plate portion and/or the second valve body.

Further, the second valve body extends along the circumferential direction of the smoke outlet and the midpoint of the second valve body along the length direction thereof is positioned at the lowest position of the smoke outlet.

Further, the central angle of the second valve body is beta, and beta is more than or equal to 30 degrees and less than or equal to 360 degrees.

Further, the width of the second valve body is b, and 0mm < b < 100mm.

An embodiment according to a second aspect of the invention proposes a flue system comprising: an indoor smoke exhaust channel; a common flue; according to an embodiment of the first aspect of the invention, the valve body is connected between the indoor smoke evacuation channel and the common flue, the smoke evacuation channel being in communication with the indoor smoke evacuation channel through the smoke inlet and with the common flue through the smoke outlet.

The flue system provided by the embodiment of the invention has the advantages of high smoke discharging efficiency and the like.

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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic diagram of a prior art flue system.

Fig. 2 is a perspective view of a flue check valve according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a flue check valve according to an embodiment of the present invention.

Fig. 4 is a perspective view of a flow guiding structure of a flue check valve according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of a flow directing structure of a flue check valve according to an embodiment of the present invention.

Fig. 6 is an enlarged view of area a in fig. 5.

Fig. 7 is a front view of a flow directing structure of a flue check valve according to an embodiment of the present invention.

Fig. 8 is a perspective view of a check structure of a flue check valve according to an embodiment of the present invention.

FIG. 9 is a side cross-sectional view of a check structure of a flue check valve according to an embodiment of the present invention.

Fig. 10 is a perspective view of a check structure of a flue check valve according to another embodiment of the present invention.

FIG. 11 is a side cross-sectional view of a check structure of a flue check valve according to another embodiment of the present invention.

Fig. 12 is a perspective view of a check structure of a flue check valve according to still another embodiment of the present invention.

FIG. 13 is a side cross-sectional view of a check structure of a flue check valve according to yet another embodiment of the present invention.

Fig. 14 is a perspective view of a flue system according to an embodiment of the present invention.

Fig. 15 is a schematic structural view of a flue system according to an embodiment of the present invention.

Reference numerals:

the prior art comprises the following steps:

a flue system 1', a range hood 10', an indoor smoke exhaust channel 20', a flue check valve 30', a common flue 40';

the invention comprises the following steps:

a flue system 1,

A range hood 10, an indoor smoke exhaust channel 20, a flue check valve 30, a public flue 40,

Valve body 100, flue gas channel 110, flue gas inlet 120, flue gas outlet 130, first valve body 140, fixed plate portion 150, second valve body 160, transition slope 170, fixed plate 180, connecting ring 190,

The non-return structure 200, the rotating shaft 210, the valve plate 220, the stop piece 230, the first valve plate 240, the second valve plate 250,

The flow guiding structure 300, the flow guiding fins 310 and the flow guiding ribs 320.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, 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 invention will be understood in specific cases by those of ordinary skill in the art.

The flue check valve 30 according to an embodiment of the present invention will be described below with reference to the accompanying drawings, and the flue check valve 30 may be a common flue check valve, i.e., the flue check valve 30 is mounted to a common flue for discharging flue gas from a room to the common flue.

As shown in fig. 2 to 15, the flue check valve 30 according to the embodiment of the present invention includes a valve body 100, a check structure 200, and a flow guide structure 300.

The valve body 100 has a flue gas channel 110, the flue gas channel 110 having a flue gas inlet 120 and a flue gas outlet 130. For example, the valve body 100 defines a smoke channel 110 extending in a front-rear direction, the smoke inlet 120 is located at a front end of the smoke channel 110, the smoke outlet 130 is located at a rear end of the smoke channel 110, and fluid such as smoke can enter the smoke channel 110 through the smoke inlet 120 and be discharged from the smoke outlet 130 along the smoke channel 110.

The check structure 200 is provided on the valve body 100, and the check structure 200 only allows the fluid in the smoke passage 110 to flow unidirectionally in the direction from the smoke inlet 120 to the smoke outlet 130. In other words, the fluid such as the smoke can enter the smoke channel 110 from the smoke inlet 120 and be discharged from the smoke outlet 130 through the non-return structure 200, but the non-return structure 200 can play a role of blocking the fluid entering from the smoke outlet 130, i.e. the fluid such as the smoke cannot enter the smoke channel 110 from the smoke outlet 130 and be discharged from the smoke inlet 120, thereby the non-return structure 200 plays a role of backflow prevention and fire prevention.

The flow guiding structure 300 is provided to the valve body 100, and the flow guiding structure 300 guides the fluid flowing out of the smoke outlet 130 upward. Specifically, when a fluid such as smoke enters the smoke channel 110 from the smoke inlet 120, the non-return structure 200 is opened, the smoke is discharged from the smoke outlet 130 through the flow guiding structure 300, and when the smoke passes through the flow guiding structure 300, the flow guiding structure 300 can guide the smoke to flow upwards, even if the smoke flowing out from the smoke outlet 130 flows upwards.

According to the flue check valve 30 provided by the embodiment of the invention, the non-return structure 200 is arranged, so that the non-return structure has both the backflow prevention and fireproof functions, and the flow guiding structure 300 is further integrated, so that the flow guiding function is realized, the impact loss of flue gas to a public flue can be further weakened, the flue gas entering the public flue flows upwards, the downward diffusion of the flue gas is avoided, the flue gas is guided to be smoothly discharged out of the public flue, the smoke discharging resistance of an upper user to a lower user is reduced, and the integral smoke discharging efficiency of the public flue is improved.

Thus, the flue check valve 30 according to an embodiment of the present invention integrates both anti-backflow, fire-resistant and flow-directing functions.

A flue check valve 30 according to a specific embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 3, the non-return structure 200 is disposed in the flue gas channel 110 and adjacent to the flue gas inlet 120, and the flow guiding structure 300 is disposed in the flue gas channel 110 and adjacent to the flue gas outlet 130. That is, the non-return structure 200 is disposed at the front of the flue gas channel 110, and the flow guiding structure 300 is disposed at the rear of the flue gas channel 110, so as to improve the flow guiding effect of the flow guiding structure 300 on the flue gas.

It should be understood by those skilled in the art that the non-return structure 200 and the flow guiding structure 300 are disposed in the flue gas channel 110 means that most of the main structures of the non-return structure 200 and the flow guiding structure 300 are disposed in the flue gas channel 110, and that it is not excluded that the partial structures of the non-return structure 200 and the flow guiding structure 300 extend out of the flue gas channel 110.

In some embodiments of the present invention, as shown in fig. 2 and 4, the guide structure 300 includes guide fins 310, the guide fins 310 extend obliquely upward in a direction from the flue gas inlet 120 to the flue gas outlet 130, and as shown in fig. 5, the guide fins 310 have a maximum inclination angle α with respect to the horizontal, 0 ° < α < 90 °, where α=50° is optimal. Specifically, the guide fins 310 are provided at the smoke outlet 130, and the guide fins 310 extend gradually upward from front to rear. The guide fins 310 play a role in guiding and restraining fluids such as flue gas, can weaken impact loss and downward diffusion of air flow to the public flue, enable the flue gas to be discharged to the outlet direction of the public flue, greatly reduce smoke discharging resistance of upper layer householder to lower layer householder, weaken mutual influence among different floors, and improve overall smoke discharging efficiency of the house.

Wherein, as shown in fig. 2 and 4, a part of the guide fins 310 is disposed in the flue gas channel 110, and another part of the guide fins 310 extends out of the flue gas channel 110 from the flue gas outlet 130, so that the flue gas guided and restrained by the guide fins 310 can rise rapidly in the public flue.

Further, the portion of the guide fin 310 protruding from the smoke passage 110 is disposed flush with the valve body 100 in the axial direction of the smoke outlet 130. In other words, the flow guiding structure 300 does not extend back beyond the valve body 100. Therefore, the flow guide structure 300 does not occupy the space of the public flue, and the flow guide structure 300 is prevented from obstructing the smoke emission in the public flue, so that the smoke discharge efficiency of the public flue is further improved.

Of course, the portion of the guide fin 310 protruding from the smoke channel 110 may also protrude outwardly beyond the valve body 100 in the axial direction of the smoke outlet 130.

Alternatively, as shown in fig. 5, the cross section of the guide fin 310 is arc-shaped, and a tangent to an end (i.e., rear end) of the cross section of the guide fin 310 adjacent to the common flue has a maximum inclination angle α with respect to the horizontal direction.

Of course, the present invention is not limited thereto, and the cross section of the guide fin 310 may be linear, i.e., the guide fin 310 is a plate-like structure.

In some embodiments of the present invention, as shown in fig. 2-5, the guide fins 310 are plural and spaced apart in the up-down direction. Specifically, each guide fin 310 extends in the left-right direction, that is, the length direction of the guide fin 310 is oriented in the left-right direction, and a plurality of guide fins 310 are arranged at intervals in the up-down direction. This improves the amount and efficiency of guiding the fluid such as the flue gas by the plurality of guide fins 310.

Alternatively, the plurality of guide fins 310 are disposed at equal intervals in the up-down direction, i.e., the distances between adjacent guide fins 310 are equal, and the plurality of guide fins 310 are uniformly distributed in the up-down direction. Of course, the pitch of the plurality of guide fins 310 may be gradually increased or gradually decreased in the up-down direction.

Preferably, the plurality of guide fins 310 are uniformly distributed in the up-down direction to improve the uniformity of the guide.

Alternatively, the widths of the plurality of guide fins 310 are equal to each other, and the width of the guide fins 310 is a dimension extending substantially in the front-rear direction and along with the shape of the cross section of the guide fins 310. Of course, the width of the plurality of guide fins 310 may be gradually increased or gradually decreased in the up-down direction.

Preferably, the width of the plurality of guide fins 310 is gradually increased in the up-to-down direction to further prevent the downward diffusion of the flue gas discharged to the common tunnel.

In embodiments in which the width of the plurality of guide fins 310 gradually increases or decreases in the up-to-down direction, the edges of the plurality of guide fins 310 adjacent to the flue gas inlet 120 are disposed flush in the axial direction of the flue gas outlet 130. I.e., the front ends of the cross sections of the plurality of guide fins 310 are disposed flush in the front-rear direction.

In some embodiments of the present invention, as shown in fig. 2 and 4, the flow guiding structure 300 further includes flow guiding ribs 320. The guide rib 320 is disposed on the guide fin 310 and extends obliquely upward along the direction from the smoke inlet 120 to the smoke outlet 130 along with the guide fin 310. For example, the guide rib 320 is provided on the upper surface of the guide fin 310 and extends in the width direction of the guide fin 310. By providing the guide rib 320 on the surface of the guide fin 310, not only the structural strength of the guide fin 310 can be enhanced, but also the vortex breaking can be rectified, so that the fluid flowing through the guide fin 310 is more stable.

Further, in order to further improve the flow guiding function of the flow guiding ribs 320, a plurality of flow guiding ribs 320 are disposed on each flow guiding fin 310, and the plurality of flow guiding ribs 320 are arranged along a direction orthogonal to the axial direction of the flue gas outlet 130, i.e. the plurality of flow guiding ribs 320 are disposed at intervals, for example, at equal intervals, along the length direction of the flow guiding fin 310.

In some embodiments of the present invention, as shown in fig. 2-7, the valve body 100 includes a first valve body 140, a fixed plate portion 150, and a second valve body 160.

The first valve body 140 is used for connecting an indoor smoke exhaust channel, the smoke channel 110 and the smoke inlet 120 are formed on the first valve body 140, and the non-return structure 200 is arranged on the first valve body 140. The fixing plate portion 150 is disposed on the first valve body 140, and is adapted to be fixed to a wall, and the smoke outlet 130 is formed on the fixing plate portion 150. The second valve body 160 is disposed on the fixing plate portion 150 and is used for connecting with a common flue interface, the second valve body 160 is disposed around the flue gas outlet 130, the flow guiding structure 300 is disposed on the fixing plate portion 150 and/or the second valve body 160, for example, the flow guiding fin 310 may be disposed on the fixing plate portion 150 and connected with the second valve body 160. Thus, the valve body 100 is conveniently connected between the indoor smoke exhaust passage and the public flue, and can be formed in a block manner, so that the production is more convenient.

Specifically, as shown in fig. 2 and 3, the first valve body 140 is configured in a cylindrical shape with both ends open, one end of the first valve body 140 forms the smoke inlet 120, and the fixing plate portion 150 is provided at the other end of the first valve body 140. For example, the smoke inlet 120 is formed at the front end of the first valve body 140, the fixing plate portion 150 is provided at the rear end of the first valve body 140, and the second valve body 160 is provided at the side of the fixing plate portion 150 facing away from the first valve body 140, i.e., the fixing plate portion 150 is located between the first valve body 140 and the second valve body 160 in the front-rear direction.

More specifically, as shown in fig. 4 and 5, the fixing plate portion 150 includes a fixing plate 180 and a connection ring 190.

The fixing plate 180 is adapted to be fixed to a wall. The connection ring 190 is provided at the fixing plate 180, for example, at the front surface of the fixing plate 180, and the connection ring 190 is connected to the other end (rear end) of the first valve body 140.

The fixing plate 180 and the second valve body 160 may be integrally formed, so as to improve structural strength and simplify assembly process, and the first valve body 140 and the fixing plate portion 150 may be detachably connected, so that the non-return structure 200 and the flow guiding structure 300 may be separated by disassembling the first valve body 140 and the fixing plate portion 150, thereby facilitating maintenance and cleaning.

In some specific examples of the present invention, as shown in fig. 5 and 6, since the common flue port is generally smaller than the indoor smoke exhaust duct, the inner diameter of the second valve body 160 is smaller than the inner diameter of the fixing plate portion 150 to accommodate the difference in inner diameters of the common flue port and the indoor smoke exhaust duct, the sealability of the connection of the valve body 100 is ensured, and a transition slope 170 is constructed between the inner circumferential surface of the second valve body 160 and the inner circumferential surface of the fixing plate portion 150 to smoothly transition the flowing air flow, reducing the resistance of the air flow.

Specifically, as shown in fig. 2 and 4, the second valve body 160 extends in the circumferential direction of the smoke outlet 130, and a midpoint of the second valve body 160 in the length direction of the second valve body 160 is located at the lowest position of the smoke outlet 130. That is, the second valve body 160 is extended upward from the lowest position of the smoke outlet 130 in the circumferential direction of the smoke outlet 130 at both ends, respectively, the guide fins 310 surrounded by the second valve body 160 are connected to the second valve body 160 at both ends, respectively. The second valve body 160 can play a role of preventing downward diffusion of smoke while playing a role of connecting a common flue interface, and can strengthen the structural strength of the guide fin 310.

Alternatively, as shown in fig. 5 and 7, the central angle of the second valve body 160 is β,30 β+.360 °, preferably β=180° in a plane orthogonal to the axial direction of the flue gas outlet 130. The width of the second valve body 160 in the axial direction (front-rear direction) of the smoke outlet 130 is b,0mm < b < 100mm. Thereby, both the reliability of the connection with the common flue interface and the guiding of the air flow and the protective effect of the guide fins 310 can be ensured.

In some embodiments of the present invention, as shown in fig. 8-13, the backstop structure 200 includes a rotation shaft 210, a valve plate 220, and a stopper 230.

The rotating shaft 210 is disposed in the flue gas channel 110, for example, mounted on the first valve body 140. The valve plate 220 is connected to the rotating shaft 210, and the valve plate 220 is rotatably disposed in the flue gas channel 110 through the rotating shaft 210. The stopper 230 is disposed in the flue gas channel 110, and the stopper 230 is stopped at a side of the valve plate 220 facing the flue gas inlet 120. The valve plate 220 is configured to be opened by fluid flowing from the flue gas inlet 120 to the flue gas outlet 130 and closed by its own weight.

Specifically, when a fluid such as smoke enters the smoke channel 110 from the smoke inlet 120, the airflow pushes the valve plate 220 open, so that the valve plate 220 opens the smoke channel 110, and the smoke is discharged from the smoke outlet 130 to the public flue. When no fluid such as smoke enters the smoke channel 110 from the smoke inlet 120, the valve plate 220 is reset under the action of gravity to close the smoke channel 110, and at the moment, the smoke in the public flue cannot push away the valve plate 220 even if entering the smoke channel 110 from the smoke outlet 130 due to the stop of the stop piece 230, so that the functions of backflow prevention and fire prevention are achieved.

In some specific examples of the present invention, as shown in fig. 8 and 9, the rotation shaft 210 extends in a horizontal direction and is located at an upper portion of the smoke channel 110, that is, the rotation shaft 210 is located above a midpoint of the smoke channel 110 in an up-down direction, and the valve plate 220 is integral and has a shape adapted to a shape of a cross section of the smoke channel 110, for example, a circular shape, thereby constituting a single-valve plate non-return structure.

In other specific examples of the present invention, as shown in fig. 10 to 13, the rotation shaft 210 extends in the up-down direction, the shape of the valve plate 220 is adapted to the shape of the cross section of the flue gas channel 110, the valve plate 220 is split and includes a first valve plate 240 and a second valve plate 250, for example, the first valve plate 240 and the second valve plate 250 are respectively semicircular, the first valve plate 240 and the second valve plate 250 are respectively rotatably disposed in the flue gas channel 110 through the common rotation shaft 210, and when the first valve plate and the second valve plate are closed, a circular plate is formed to jointly close the flue gas channel 110, thereby forming a double valve plate non-return structure.

Alternatively, as shown in fig. 10 and 11, the first valve plate 240 and the second valve plate 250 are both flat plates, and the resistance of the air flow passing through is small and the distribution is uniform.

Preferably, as shown in fig. 12 and 13, the first valve plate 240 and the second valve plate 250 are respectively in a spherical crown shape protruding to one side of the flue gas inlet 120, that is, the first valve plate 240 and the second valve plate 250 are respectively configured in a streamline shape, when the first valve plate 240 and the second valve plate 250 are opened, the first valve plate 240 and the second valve plate 250 are buckled and integrally form a streamline structure with the outer surface, when the air flows, the air flows are uniformly distributed and have smaller resistance, and the flow separation generated when the air flows pass can be reduced, in addition, the air flows passing through the first valve plate 240 and the second valve plate 250 are more beneficial to the guiding of the guiding structure 300, so that the guiding effect is further improved.

A flue system 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 14 and 15, the flue system 1 according to the embodiment of the present invention includes an indoor smoke discharge path 20, a common flue 40, and a flue check valve 30.

The indoor smoke evacuation channel 20 is provided indoors, for example in a kitchen. The common tunnel 40 may extend in the up-down direction. The valve body 100 of the flue check valve 30 is connected between the indoor smoke evacuation channel 20 and the common flue 40, the smoke evacuation channel 110 communicates with the indoor smoke evacuation channel 20 through the smoke inlet 120, and the smoke evacuation channel 110 communicates with the common flue 40 through the smoke outlet 130.

In some embodiments of the present invention, the indoor smoke evacuation channel 20 is adapted to be connected to the range hood 10, and the valve body 100 is mounted on a wall between the indoor smoke evacuation channel 20 and the common tunnel 40 to fix the tunnel check valve 30.

According to the flue system 1 of the embodiment of the invention, by utilizing the flue check valve 30 according to the embodiment of the invention, not only the functions of preventing flue gas backflow and preventing fire are achieved, but also the flue resistance of an upper user to a lower user can be reduced, so that the flue check valve has the advantages of high flue gas discharging efficiency and the like.

Other constructions and operations of the flue check valve 30 and flue system 1 according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative 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 invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flue check valve, comprising:

the valve body is provided with a smoke channel, and the smoke channel is provided with a smoke inlet and a smoke outlet;

the check structure is arranged on the valve body and only allows fluid in the smoke channel to flow unidirectionally in the direction from the smoke inlet to the smoke outlet;

the flow guiding structure is arranged on the valve body and guides fluid flowing out of the smoke outlet upwards;

the flow guiding structure comprises:

a guide fin extending obliquely upward in a direction from the flue gas inlet to the flue gas outlet, a part of the guide fin being provided in the flue gas channel and another part extending out of the flue gas channel from the flue gas outlet;

the guide rib is arranged on the guide fin and extends upwards along with the guide fin in an inclined mode along the direction from the flue gas inlet to the flue gas outlet;

the non-return structure comprises a first valve plate and a second valve plate, and the first valve plate and the second valve plate are respectively spherical crowns protruding to one side of the flue gas inlet;

the plurality of guide ribs are arranged along the direction orthogonal to the axial direction of the smoke outlet.

2. The flue check valve of claim 1, wherein the backstop structure is disposed within the flue gas channel and adjacent the flue gas inlet and the flow directing structure is disposed within the flue gas channel and adjacent the flue gas outlet.

3. The flue check valve of claim 1, wherein the portion of the guide fin that protrudes out of the flue gas channel is disposed flush with or beyond the valve body in the axial direction of the flue gas outlet.

4. The flue check valve of claim 1, wherein the guide fins have a maximum inclination angle α with respect to the horizontal of 0 ° < α < 90 °.

5. The flue check valve of claim 1, wherein the cross-section of the guide fins is arcuate or rectilinear.

6. The flue check valve of claim 1, wherein the guide fins are a plurality of and spaced apart in the up-down direction.

7. The flue check valve of claim 6, wherein a plurality of said guide fins are disposed at equal intervals in the up-down direction.

8. The flue check valve of claim 6, wherein the spacing of the plurality of guide fins increases or decreases progressively in a top-to-bottom direction.

9. The flue check valve of claim 6, wherein the widths of a plurality of said guide fins are equal to one another.

10. The flue check valve of claim 6, wherein the widths of the plurality of guide fins gradually increase or decrease in a top-to-bottom direction.

11. The flue check valve of claim 10, wherein edges of a plurality of said guide fins adjacent said flue gas inlet are disposed flush in an axial direction of said flue gas outlet.

12. The flue check valve of any one of claims 1 to 11, wherein the valve body includes:

the smoke channel and the smoke inlet are formed in the first valve body, and the non-return structure is arranged in the first valve body;

the fixed plate part is arranged on the first valve body, and the smoke outlet is formed in the fixed plate part;

the second valve body is arranged on the fixing plate portion and around the smoke outlet, and the flow guide structure is arranged on the fixing plate portion and/or the second valve body.

13. The flue check valve of claim 12, wherein the second valve body extends circumferentially of the flue gas outlet and a midpoint of the second valve body along its length is located at a lowest point of the flue gas outlet.

14. The flue check valve of claim 13, wherein the central angle of the second valve body is β,30 β being less than or equal to 360 °.

15. The flue check valve of claim 12, wherein the second valve body has a width b,0mm < b < 100mm.

16. A flue system, comprising:

an indoor smoke exhaust channel;

a common flue;

the flue check valve of any one of claims 1 to 15, the valve body being connected between the indoor smoke evacuation channel and the common flue, the smoke evacuation channel being in communication with the indoor smoke evacuation channel through the smoke inlet and with the common flue through the smoke outlet.