Check valve and oil smoke suction system with same

Abstract

The utility model relates to a check valve and an oil smoke suction system with the check valve, the check valve comprises a valve body, the valve body is internally provided with a fluid channel, and the fluid channel is provided with an inlet end for oil smoke to flow in and an outlet end for oil smoke to flow out; the valve plate is rotatably arranged in the fluid channel so as to cut off or connect a passage in the valve body; a sprayer is arranged on the valve body, a water inlet hole of the sprayer is used for being connected with an external water source, and a spraying hole of the sprayer faces the inner side wall of the fluid channel and / or the valve plate. When the check valve needs to be cleaned, an external water source can be sprayed out through the spraying holes of the sprayer, so that the inner side wall of the valve body and / or the valve plate are / is washed and self-cleaned, in the whole process, the check valve does not need to be disassembled, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of range hoods, and in particular relates to a check valve and a range hood suction system with the check valve. Background Art

[0002] Existing range hoods generally have a smoke inlet and a smoke exhaust port. Indoor fumes are sucked into the range hood from the smoke inlet and discharged outdoors from the smoke exhaust port. During installation, there are generally two situations: 1. The smoke exhaust port of the range hood is connected to the public flue of the building through an air duct. At this time, it is necessary to prevent the backflow of fumes in the public flue; 2. The smoke exhaust port of the range hood is connected to the smoke exhaust hole on the outer wall of the building through an air duct. At this time, it is necessary to prevent rainwater from flowing back and birds from accidentally entering. Therefore, both of the above two installation situations require the installation of a check valve in the smoke exhaust channel. The structure of the check valve is as shown in the Chinese invention patent "An air outlet hood for range hoods" with patent number ZL02112348.9 (authorization announcement number CN1186565C), which includes a check valve plate located in the hood body. The check valve plate is a thin plate that matches the shape of the air outlet hood opening. The check valve is fixed on a rotating shaft that radially penetrates the air outlet hood and is driven by a driving mechanism. On the inner walls of the air outlet hood on both sides of the rotating shaft, an upper limit step slightly higher than the upper limit step and a lower limit step slightly lower than the upper limit step are relatively arranged, so that the edges of the check valve plate on both sides of the rotating shaft are respectively placed at the upper limit and the lower limit.

[0003] After the check valve has been used for a period of time, the oil stains will cause the valve plate to be difficult to open and close, affecting the exhaust of the range hood. For this reason, the whole machine is currently mostly disassembled and cleaned manually, such as the Chinese utility model patent "A range hood check valve that is easy to disassemble and clean" with patent number 202320672365.3 (authorization announcement number CN219472821U), which includes a mounting seat, an elastic sleeve is fixedly connected to the middle of one side of the mounting seat, a threaded column is arranged inside the elastic sleeve, a connecting ring is fixedly connected to one side of the threaded column, two fixing plates are fixedly connected to both sides of the connecting ring, a connecting column is fixedly connected to one side of the fixing plate, a torsion spring is arranged on the outer wall of the connecting column, and elastic parts are rotatably connected to the adjacent ends of the two connecting columns. The above check valve structure is convenient for its disassembly and cleaning. However, due to the special installation position of the check valve, such as being located on the upper side of the wall, it is necessary to climb up to work, which poses a safety hazard; and there is a risk of missing internal parts or local structural damage during the disassembly and assembly process. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a check valve for easy cleaning in view of the current status of the prior art.

[0005] The second technical problem to be solved by the utility model is to provide a fume suction system having the above-mentioned check valve.

[0006] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a check valve, comprising:

[0007] A valve body having a fluid passage therein, wherein the fluid passage has an inlet end for the oil smoke to flow in and an outlet end for the oil smoke to flow out;

[0008] A valve plate is rotatably disposed in the fluid passage to cut off or open the passage in the valve body;

[0009] Features:

[0010] The valve body is provided with a sprayer, the water inlet hole of the sprayer is used to connect to an external water source, and the spray hole of the sprayer faces the inner wall of the fluid channel and / or the valve plate.

[0011] In this way, when the check valve needs to be cleaned, external water can be sprayed out through the spray hole of the sprinkler to flush and self-clean the inner wall of the valve body and / or the valve plate. During the whole process, there is no need to disassemble the check valve, which is convenient for operation.

[0012] Preferably, the sprayer is arranged on the downstream side of the valve plate along the flow direction of the oil smoke from the inlet end to the outlet end, so as to reduce the pollution of the oil smoke airflow to the sprayer and facilitate the discharge of the washed sewage to the outside.

[0013] Furthermore, the fluid channel is arranged horizontally, and a drainage gap is arranged at the lower edge of the outlet end. In this way, the washed sewage can be discharged to the outside through the drainage gap. When the range hood is working, the exhaust oil fume airflow can cause the sewage to be discharged through the drainage gap.

[0014] In addition, the sewage flushed in the utility model can also be returned to the range hood through the inlet end and collected in the oil cup of the range hood.

[0015] Preferably, the sprayer is arranged at the top of the fluid channel, and the spray hole is arranged downward.

[0016] Preferably, the valve plate includes a first valve plate and a second valve plate, which are arranged side by side to block the fluid channel as a whole, and the vertically extending first edge of the first valve plate is opposite to the vertically extending second edge of the second valve plate. Under the action of external force, the first valve plate is arranged to be able to rotate toward the outlet end of the valve body around its first edge or a first axis parallel to the first edge, and the second valve plate is arranged to be able to rotate toward the outlet end of the valve body around its second edge or a second axis parallel to the second edge, thereby opening the passage in the valve body.

[0017] Furthermore, the first valve plate and the second valve plate are arranged to rotate under the action of the oil smoke airflow in the fluid channel to conduct the passage in the valve body, and also include an elastic member acting on the first valve plate and the second valve plate so that the first valve plate and the second valve plate always have the tendency to rotate to block the fluid channel and cut off the passage in the valve body. In this way, when the range hood is working, the valve plate opens to conduct the passage in the valve body, and when the range hood is stopped, the valve plate closes to cut off the passage in the valve body.

[0018] Furthermore, when the first valve plate and the second valve plate are horizontally blocked in the fluid passage to cut off the passage in the valve body, the leeward surfaces of the first valve plate and the second valve plate are located within the spraying range of the spray hole of the sprinkler;

[0019] When the first valve disc and the second valve disc rotate toward the outlet end of the valve body to open the passage in the valve body, the windward surfaces of the first valve disc and the second valve disc are located within the spraying range of the spray hole of the sprinkler.

[0020] In this way, the windward side and the leeward side of the valve plate can be flushed by operating and stopping the range hood.

[0021] In the utility model, when the range hood is stopped, the windward side faces the inlet end of the valve body, and the leeward side faces the outlet end of the valve body.

[0022] Furthermore, the sprayer has a bottom wall that arches downward, and a plurality of the above-mentioned spray holes are spaced apart on the bottom wall, and each spray hole faces a different direction, so that multi-directional spray flushing can be achieved and the spray range can be increased.

[0023] In the above schemes, preferably, a heater is further included, which is arranged on the valve body and is used to heat the valve body and / or the valve plate. When cleaning, the heater can be turned on first, and after the temperature of the valve body and / or the valve plate rises (heating can liquefy or gasify oil stains and attachments), the sprayer can be used for spraying to improve the cleaning effect. After the spraying is completed, the heater can also be turned on to dehumidify and dry the check valve.

[0024] Preferably, the heater is an infrared heating lamp, and there are at least two infrared heating lamps arranged on both sides of the sprayer along the circumference of the fluid channel.

[0025] Furthermore, it also includes an induction counter for sensing and calculating the number of valve plate rotations, a controller electrically connected to the induction counter, and an output end of the controller is electrically connected to an electric control valve of a pipeline for conveying the external water source and the heater. In this way, self-cleaning can be automatically started according to the number of valve plate rotations.

[0026] The technical solution adopted by the utility model to solve the second technical problem is: a fume extraction system having the check valve as described above, characterized in that it also includes a range hood, and the smoke outlet of the range hood is connected to the inlet end of the valve body through a smoke exhaust pipe.

[0027] Compared with the prior art, the advantage of the utility model is that by setting a sprayer, when the check valve needs to be cleaned, external water can be sprayed out through the spray hole of the sprayer, thereby flushing and self-cleaning the inner wall of the valve body and / or the valve plate. During the whole process, there is no need to disassemble the check valve, which is convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the check valve of the utility model embodiment (the valve plate cuts off the passage in the valve body);

[0029] Figure 2 This is a schematic diagram of the structure of the check valve of the utility model embodiment from another perspective (the valve plate cuts off the passage in the valve body);

[0030] Figure 3 This is a structural schematic diagram of the check valve of the utility model embodiment from another perspective (the valve plate cuts off the passage in the valve body);

[0031] Figure 4 This is a three-dimensional exploded view of the check valve of the embodiment of the utility model (the valve plate cuts off the passage in the valve body);

[0032] Figure 5 This is a cross-sectional view of the check valve of the utility model embodiment (the valve plate cuts off the passage in the valve body);

[0033] Figure 6 It is a schematic diagram of the partial structure of the check valve of the embodiment of the utility model (the valve plate conducts the passage in the valve body). DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] like Figures 1 to 6 As shown, a preferred embodiment of a check valve and a range hood system having the check valve of the utility model is shown. The check valve is used for a range hood and comprises: a valve body 1, a valve plate 2, a sprayer 3, a heater 4 and an elastic member 6.

[0036] The valve body 1 has a fluid channel 10 inside, and the fluid channel 10 has an inlet end 11 for oil smoke to flow in and an outlet end 12 for oil smoke to flow out. In this embodiment, the fluid channel 10 is arranged horizontally. The lower edge of the outlet end 12 is provided with a drainage notch 121.

[0037] The valve disc 2 is rotatably disposed in the fluid channel 10 to cut off or open the passage in the valve body 1. Specifically, the valve disc 2 includes a first valve disc 21 and a second valve disc 22, which are arranged side by side and are integrally horizontally blocked in the fluid channel 10 to cut off the passage in the valve body 1, and the vertically extending first edge 211 of the first valve disc 21 is opposite to the vertically extending second edge 221 of the second valve disc 22. Under the action of the oil smoke airflow from the inlet end 11 to the outlet end 12 in the fluid channel 10, the first valve disc 21 can rotate around its first edge 211 or a first axis parallel to the first edge 211 toward the outlet end 12 of the valve body 1, and the second valve disc 22 is arranged to rotate around its second edge 221 or a second axis parallel to the second edge 221 toward the outlet end 12 of the valve body 1, thereby opening the passage in the valve body 1. Figure 3 As shown, the elastic member 6 is a spring, which acts on the first valve plate 21 and the second valve plate 22, so that the first valve plate 21 and the second valve plate 22 always have a tendency to rotate to block the fluid channel 10 and cut off the passage in the valve body 1. In this way, when the range hood is working, the valve plate 2 rotates under the action of the oil smoke airflow to open the passage in the valve body 1. For details, please refer to Figure 6 When the range hood is stopped, the valve plate 2 is reset under the action of the elastic member 6 to cut off the passage in the valve body 1. For details, please refer to Figures 1 to 5 .

[0038] like Figures 4 to 6 As shown, the above-mentioned sprinkler 3 is arranged at the top of the fluid channel 10, and along the flow direction of the oil smoke from the inlet end 11 to the outlet end 12, the sprinkler 3 is arranged on the downstream side of the valve plate 2. At the same time, the water inlet of the sprinkler 3 is used to connect to the external water source, and the spray hole 31 of the sprinkler 3 is arranged downward. In this embodiment, the sprinkler 3 has a bottom wall that arches downward, and a plurality of the above-mentioned spray holes 31 are distributed at intervals on the bottom wall, and the directions of the spray holes 31 are different, so that multi-directional spraying can be achieved and the spray range is improved. When the first valve disc 21 and the second valve disc 22 are horizontally blocked in the fluid passage 10 and the passage in the valve body 1 is cut off, the leeward surfaces 2b of the first valve disc 21 and the second valve disc 22 are located within the spray range of the spray hole 31 of the sprinkler 3; when the first valve disc 21 and the second valve disc 22 are rotated toward the outlet end 12 of the valve body 1 and the passage in the valve body 1 is opened, the windward surfaces 2a of the first valve disc 21 and the second valve disc 22 are located within the spray range of the spray hole 31 of the sprinkler 3.

[0039] like Figure 6 As shown, the heater 4 is an infrared heating lamp, and there are two infrared heating lamps which are arranged on both sides of the sprayer 3 along the circumference of the fluid channel 10 for heating the valve body 1 and the valve plate 2.

[0040] In this way, when the check valve needs to be cleaned, the range hood is ensured to be in the shutdown state, and the heater 4 starts to work. The heating can liquefy or gasify the oil and attachments inside the valve body 1. After heating the inside of the valve body 1 for a certain period of time, the heater 4 is turned off, and the sprayer 3 starts to spray water on the inside of the valve body 1. The spraying process is divided into two stages. The first stage is the shutdown state of the range hood. The valve plate 2 cuts off the passage in the valve body 1, and the spray water cleans the inner wall of the valve body 1 and the leeward side 2b of the valve plate 2. During the cleaning process, the oil and attachments after the initial heating can be easily washed down and discharged. The second stage is the start-up state of the range hood. The valve plate 2 rotates to conduct the passage in the valve body 1, and the spray water cleans the inner wall of the valve body 1 and the windward side 2a of the valve plate 2, and under the action of wind pressure, the washed sewage is discharged from the drainage gap 121.

[0041] The check valve of this embodiment further includes an induction counter 5 for sensing and calculating the number of rotations of the valve plate 2, and a controller electrically connected to the induction counter 5, and the output end of the controller is electrically connected to the electric control valve on the pipeline 32 for conveying external water source and the heater 4. In this way, self-cleaning can be automatically controlled according to the number of rotations of the valve plate 2.

[0042] The range hood system of this embodiment includes an existing range hood and the above-mentioned check valve. The smoke outlet of the range hood is connected to the inlet end 11 of the valve body 1 through a smoke exhaust pipe.

[0043] In the specification and claims of the present invention, terms indicating directions, such as "upper", "lower", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A check valve, comprising: A valve body (1) having a fluid channel (10) therein, wherein the fluid channel (10) has an inlet end (11) for oil smoke to flow in and an outlet end (12) for oil smoke to flow out; A valve plate (2) is rotatably disposed in the fluid passage (10) to cut off or open the passage in the valve body (1); Features: The valve body (1) is provided with a sprayer (3), the water inlet of the sprayer (3) is used to connect to an external water source, and the spray hole (31) of the sprayer (3) faces the inner wall of the fluid channel (10) and / or the valve plate (2).

2. The check valve according to claim 1, characterized in that: Along the flow direction of the oil smoke from the inlet end (11) to the outlet end (12), the sprayer (3) is arranged on the downstream side of the valve plate (2).

3. The check valve according to claim 2, characterized in that: The fluid channel (10) is arranged horizontally, and a drainage notch (121) is provided at the lower edge of the outlet end (12).

4. The check valve according to claim 3, characterized in that: The sprayer (3) is arranged at the top of the fluid channel (10), and the spray hole (31) is arranged downward.

5. The check valve according to claim 4, characterized in that: The valve disc (2) comprises a first valve disc (21) and a second valve disc (22), which are arranged side by side to block the fluid passage (10) as a whole, and a vertically extending first edge (211) of the first valve disc (21) is opposite to a vertically extending second edge (221) of the second valve disc (22). Under the action of an external force, the first valve disc (21) is arranged to be able to rotate around its first edge (211) or a first axis parallel to the first edge (211) toward the outlet end (12) of the valve body (1), and the second valve disc (22) is arranged to be able to rotate around its second edge (221) or a second axis parallel to the second edge (221) toward the outlet end (12) of the valve body (1), thereby opening the passage in the valve body (1).

6. The check valve according to claim 5, characterized in that: The first valve plate (21) and the second valve plate (22) are arranged to be able to rotate under the action of the oil smoke airflow in the fluid channel (10) to conduct the passage in the valve body (1), and also include an elastic member (6) that acts on the first valve plate (21) and the second valve plate (22) so that the first valve plate (21) and the second valve plate (22) always have the tendency to rotate to cross the fluid channel (10) and cut off the passage in the valve body (1).

7. The check valve according to claim 5, characterized in that: When the first valve disc (21) and the second valve disc (22) are horizontally blocked in the fluid passage (10) to cut off the passage in the valve body (1), the leeward surfaces (2b) of the first valve disc (21) and the second valve disc (22) are located within the spraying range of the spray hole (31) of the sprayer (3); When the first valve disc (21) and the second valve disc (22) rotate toward the outlet end (12) of the valve body (1) to open the passage in the valve body (1), the windward surfaces (2a) of the first valve disc (21) and the second valve disc (22) are located within the spraying range of the spray hole (31) of the sprinkler (3).

8. The check valve according to claim 4, characterized in that: The sprayer (3) has a bottom wall that arches downward, and a plurality of the above-mentioned spray holes (31) are distributed at intervals on the bottom wall, and the directions of the spray holes (31) are different.

9. The check valve according to any one of claims 1 to 8, characterized in that: It also includes a heater (4) which is arranged on the valve body (1) and is used to heat the valve body (1) and / or the valve plate (2).

10. The check valve according to claim 9, characterized in that: The heater (4) is an infrared heating lamp, and there are at least two infrared heating lamps which are arranged on both sides of the sprayer (3) along the circumference of the fluid channel (10).

11. The check valve according to claim 9, characterized in that: It also includes an induction counter (5) for sensing and calculating the number of rotations of the valve plate (2), and a controller electrically connected to the induction counter (5); the output end of the controller is electrically connected to the electric control valve on the pipeline (32) for conveying the external water source and the heater (4).

12. A fume extraction system having a check valve as claimed in any one of claims 1 to 11, characterized in that Also included is a range hood, the smoke outlet of the range hood being connected to the inlet end (11) of the valve body (1) via a smoke exhaust pipe.

Images