Odor tainting prevention flow plug for building discharge flue

Abstract

The odor tainting prevention flow plug comprises a cuboid-shaped groove body, a square guide groove is vertically formed in the groove body, a range hood opening communicated with the guide groove is formed in the inner side face of the lower portion of the groove body, and a smoke outlet communicated with the guide groove is formed in the upper end face of the groove body. A plurality of flow blocking grooves with upward inclined openings are longitudinally arranged on the left side and the right side of the guide groove at equal intervals in a staggered mode, flow guide plates with upward inclined inner side ends are arranged in the flow blocking grooves, the upper ends of the flow guide plates extend to the vertical center line position of the guide groove, and U-shaped vortex grooves are formed in the flow blocking grooves through the flow guide plates. The anti-backflow structure is simple to form, easy to manufacture, high in structural strength, not easy to damage and capable of effectively preventing the problems of smoke backflow and odor tainting in the discharge flue of the building.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, in particular to an anti-smell baffle for a smoke exhaust duct of a building. Background Art

[0002] Buildings are all equipped with exhaust ducts for discharging oil smoke, and the exhaust ports of the exhaust ducts are all set at the top of the exhaust ducts. With the development of society, buildings are built higher and higher, and the exhaust ducts are getting longer and longer. The exhaust of oil smoke from the bottom floors to the exhaust ducts is generally not smooth, and there are problems such as smoke backflow and odor from the hood outlet.

[0003] In order to solve the problems of smoke backflow and odor transfer, the current common practice is to set a check valve on the user exhaust port of the public smoke exhaust duct, such as: my country's patent with publication number CN109210247A discloses "a new type of flue check valve", which has a smoke barrier valve plate hinged on the exhaust pipe port. When the range hood is started, the smoke barrier valve plate opens under the action of the range hood wind. When the range hood is not started, the smoke barrier valve plate falls down and closes the exhaust pipe port under the action of its own gravity, thereby solving the problems of smoke backflow and odor transfer. The disadvantage is that after a period of use, oil will adhere to the smoke barrier valve plate and the hinge shaft, the smoke barrier valve plate is easy to stick, the smoke barrier valve plate cannot be opened and closed smoothly, and the function of the check valve is lost.

[0004] The Chinese patent with announcement number CN201794265U discloses "a smoke exhaust duct to prevent cross-flow", including a smoke exhaust duct that vertically passes through each floor of a residential building, an exhaust port is provided on the smoke exhaust duct, and a semi-elliptical guide plate is fixed on the front wall of the smoke exhaust duct at the lower end of the exhaust port; the upper edge of the guide plate is connected to a semi-circular air guide pipe, and an exhaust hole is provided on the upper part of the air guide pipe. The disadvantage is that during the cooking period, when the residents on multiple floors turn on the range hoods and the wind pressure in the smoke exhaust duct is relatively high, the smoke in the smoke exhaust duct can still flow back through the exhaust holes and the exhaust ports and cross-flow to the residents who have not turned on the range hoods. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a smoke exhaust duct anti-odor baffle for a building, which has simple molding, easy production, high structural strength, and is not easy to damage. It can effectively prevent smoke backflow and odor problems in the smoke exhaust duct of a building.

[0006] The technical solution adopted by the present invention is: a baffle for preventing odor cross-contamination in a smoke exhaust duct of a building, which includes a rectangular trough body, a square guide groove is vertically arranged inside the trough body, a smoke machine port connected to the guide groove is arranged on the inner side surface of the lower part of the trough body, a smoke outlet connected to the guide groove is arranged on the upper end surface of the trough body, a plurality of baffle grooves with openings inclined upward are arranged at equal intervals on the left and right sides of the guide groove, a guide plate with an inner end inclined upward is arranged inside the baffle groove, the upper end of the guide plate extends to the vertical center line of the guide groove, and the guide plate forms a U-shaped vortex groove inside the baffle groove.

[0007] Preferably, the center line of the flow blocking groove and the guide plate forms an angle of 30° to 40° with the vertical plane. The beneficial effect of this preferred design is that a reasonable angle is conducive to reducing the height of the groove body while ensuring a better flow blocking effect.

[0008] Preferably, the lower end of the choke groove is in an arc shape, and the lower end of the guide plate is in an arc shape. The beneficial effect of this preferred design is that the width of the U-shaped vortex groove is consistent, which is conducive to smooth flow guidance.

[0009] Preferably, the upper end of the guide plate is pointed. The beneficial effect of this preferred design is that it helps to reduce the flow resistance of the downward flue gas and the upward flue gas.

[0010] Preferably, the tank body is composed of an inner main tank body and an outer tank cover plate, the guide groove, smoke outlet, guide plate, and U-shaped vortex groove are all arranged on the main tank body, and the smoke machine port is arranged on the tank cover plate. The beneficial effect of this preferred design is that it is easy to use molds for molding and reduces the production cost.

[0011] Preferably, the number of flow blocking grooves arranged at equal intervals on the left and right sides of the guide groove is 4-12. The beneficial effect of this preferred design is that the design of the flow blocking grooves and the guide plate is to prevent the smoke from going down, and a reasonable number of flow blocking grooves finds a reasonable balance between the production cost and preventing the smoke from flowing back.

[0012] Preferably, the lower inner edge of the main tank body is rounded. The beneficial effect of this preferred design is that it is conducive to reducing the upward smoke resistance of the public smoke exhaust duct.

[0013] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can be formed by clay or concrete molds and directly built on the smoke exhaust duct when constructing the smoke exhaust duct of a building. Its structural strength and expansion coefficient are consistent with the wall material of the smoke exhaust duct, which can ensure the overall strength of the building and will not cause wall cracks in the later stage.

[0014] (2) When constructing a building, a smoke exhaust duct of the present invention is built on each floor. When the range hood of the resident is working, the smoke exhausted from the range hood can be smoothly discharged through the range hood port, guide groove, and smoke outlet. Although it is a serpentine direction, it does not affect the smooth discharge of the upward smoke.

[0015] (3) When the range hood of a resident is not working, the range hoods of other residents are working, especially during the peak cooking hours. Many residents discharge smoke into the exhaust duct at the same time. The air pressure in the exhaust duct increases, and the smoke will flow downward from the smoke outlet of the resident who has not turned on the range hood. The downward smoke will be diverted by the guide plate into the U-shaped vortex groove. The smoke enters from the upper mouth of the U-shaped vortex groove, forms a vortex in the U-shaped vortex groove, and then rushes upward into the guide groove from the lower mouth of the U-shaped vortex groove. Multiple guide plates can divert almost all the downward smoke into the U-shaped vortex groove. Multiple smoke rushing upward into the guide groove from the lower mouth of the U-shaped vortex groove forms an upward lift, which effectively prevents the smoke in the exhaust duct from entering from the smoke outlet, thereby effectively preventing the backflow of smoke and odor in the exhaust duct of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side structural schematic diagram of the smoke exhaust duct anti-odor baffle of a building installed on the smoke exhaust duct of the building according to the present invention; Figure 2 It is a schematic diagram of a horizontal cross-sectional structure of the smoke exhaust duct anti-odor baffle of a building installed on the smoke exhaust duct of the building according to the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the smoke exhaust duct anti-odor baffle of the building of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the main tank body of the smoke exhaust duct anti-odor baffle of the building of the present invention; Figure 5 It is a schematic diagram of the plane structure of the main tank body of the smoke exhaust duct anti-odor baffle of the building of the present invention; Figure 6 The present invention is a schematic diagram of the working principle of the smoke exhaust duct anti-odor baffle of the building.

[0017] In the figure: 1-smoke exhaust duct, 2-trough body, 21-main trough body, 22-trough cover plate, 3-guide groove, 4-smoke machine outlet, 5-smoke outlet, 6-guide plate, 7-U-shaped vortex groove, 8-upward flue gas, 9-downward flue gas, 10-center line. DETAILED DESCRIPTION

[0018] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0019] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should be the common meanings understood by technicians in the field to which the present invention belongs. In the description of this application, it should be understood that the terms "center", "longitudinal", "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0020] Example: Figure 1 and Figure 2 As shown, the building is provided with a smoke exhaust duct 1 for exhausting oil smoke, and the exhaust ports of the smoke exhaust duct are all arranged at the top of the smoke exhaust duct, and the present invention is arranged on the inner side of the smoke exhaust duct 1 of each floor resident.

[0021] like Figures 3 to 5 As shown, a smoke exhaust duct anti-smell baffle for a building comprises a rectangular trough body 2, which is composed of an inner main trough body 21 and an outer trough cover plate 22. A square guide groove 3 is vertically arranged inside the main trough body 21, a smoke outlet 5 connected to the guide groove 3 is arranged on the upper end surface of the main trough body 21, and a smoke machine port 4 connected to the guide groove 3 is arranged at the lower part of the trough cover plate 22. Six baffle grooves with openings tilted upward are arranged at equal intervals on the left and right sides of the guide groove 3, and a baffle plate 6 with an inner end tilted upward is arranged inside the baffle groove. The upper end of the baffle groove and the center line 10 of the baffle groove and the baffle plate 6 form an angle of 37° with the vertical plane. The baffle plate 6 forms a U-shaped vortex groove 7 inside the baffle groove. The lower end of the baffle groove is in an arc shape, the lower end of the baffle plate 6 is in an arc shape, and the upper end of the baffle plate 6 is in a pointed shape; the lower edge of the inner side of the main trough body 21 is rounded.

[0022] like Figure 6 As shown, the working principle of the present invention is described as follows in conjunction with the accompanying drawings: (1) When the household range hood is in operation, the smoke exhausted from the household range hood is the ascending smoke 8, which enters the guide groove 3 from the range hood outlet 4. Although the ascending smoke 8 has a serpentine direction in the guide groove 3, it does not affect the ascending smoke 8 from being smoothly discharged from the smoke outlet 5 into the smoke exhaust duct 1.

[0023] (2) When the range hood of a resident is not working, the range hoods of other residents are working, especially during the peak cooking period. Many residents discharge smoke into the smoke exhaust duct at the same time. The air pressure in the smoke exhaust duct increases, and the smoke will enter downward from the smoke outlet 5 of the present invention of the resident who has not turned on the range hood. The downward smoke 9 will be diverted by the guide plate 6 into the U-shaped vortex groove 7. The downward smoke enters from the upper mouth of the U-shaped vortex groove 7, forms a swirling vortex in the U-shaped vortex groove 7, and then rushes upward from the lower mouth of the U-shaped vortex groove 7 into the guide groove 3. The six guide plates can divert almost all of the downward smoke 9 into their respective U-shaped vortex grooves 7. The six smokes that rush upward from the lower mouth of the U-shaped vortex groove 7 into the guide groove 3 form an upward lift, which effectively prevents the smoke in the smoke exhaust duct from entering from the smoke outlet 5, thereby effectively preventing the smoke in the smoke exhaust duct of the building from backflowing and odor from entering the room.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A smoke exhaust duct anti-odor baffle for a building, characterized in that It includes a rectangular trough body, a square guide groove is vertically arranged inside the trough body, a range hood port connected to the guide groove is arranged on the inner side surface of the lower part of the trough body, a smoke outlet connected to the guide groove is arranged on the upper end surface of the trough body, a plurality of choke grooves with openings inclined upward are arranged at equal intervals on the left and right sides of the guide groove, a guide plate with an inner end inclined upward is arranged inside the choke groove, the upper end of the guide plate extends to the vertical center line of the guide groove, and the guide plate forms a U-shaped vortex groove inside the choke groove.

2. The smoke exhaust duct anti-odor baffle for buildings according to claim 1 is characterized in that : The center line of the choke groove and the guide plate forms an angle of 30° to 40° with the vertical plane.

3. The smoke exhaust duct anti-odor baffle of a building according to claim 2, characterized in that The lower end of the choke groove is in an arc shape, and the lower end of the guide plate is in an arc shape.

4. The smoke exhaust duct anti-odor baffle of a building according to claim 3, characterized in that :The upper end of the guide plate is pointed.

5. The smoke exhaust duct anti-odor baffle for buildings according to claim 4 is characterized in that The trough body is composed of an inner main trough body and an outer trough cover plate. The guide groove, smoke outlet, guide plate, and U-shaped vortex groove are all arranged on the main trough body, and the range hood outlet is arranged on the trough cover plate.

6. The smoke exhaust duct anti-odor baffle for buildings according to claim 5, characterized in that : The number of flow blocking grooves arranged at equal intervals and staggered in the longitudinal direction on the left and right sides of the guide groove is 4-12.

7. The smoke exhaust duct anti-odor baffle of a building according to claim 6, characterized in that : The lower inner edge of the main tank is rounded.

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