Combined range hood

Abstract

The utility model discloses a range hood, in particular a combined range hood, which comprises a main range hood and an auxiliary range hood, the auxiliary range hood comprises an auxiliary fan, a first pipeline and a second pipeline, the first pipeline is used for discharging oil smoke, the second pipeline is used for supplementing air, and the auxiliary fan is communicated with fluid of the main range hood through the first pipeline. And the auxiliary fan is communicated with outdoor fluid through a second pipeline. Compared with the prior art, the range hood disclosed by the utility model has the advantages that the auxiliary range hood is simultaneously connected with the main range hood and the outside, so that not only can the function of exhausting oil smoke or steam be realized, but also air can be supplemented into a kitchen from the outside, and air is prevented from being supplemented into a room due to overlarge indoor negative pressure during oil smoke suction so as to ensure the oil smoke suction effect; or fresh air is supplemented into the kitchen, so that the air quality is improved, and the air management of the kitchen is realized.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a combined range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics, using a centrifugal fan installed inside the range hood to absorb and exhaust oil fumes, and using a filter to filter out some grease particles.

[0003] In addition to cooking on stoves, there are other scenarios that produce oil smoke in the kitchen. For example, automatic cooking machines and electric baking pans, as well as water vapor produced by boiling water and cooking Chinese medicine. The oil smoke or water vapor produced in these scenarios cannot be discharged through the range hood because they are far away from the range hood, so there is a need for auxiliary range hoods in the kitchen.

[0004] The current auxiliary range hood, such as a composite range hood disclosed in Chinese patent application number 201810190012.3, includes a stove and a main range hood part. The main range hood is fixedly installed on the wall directly above the stove, and an auxiliary range hood assembly is also installed on the right side of the main range hood. A smoke outlet is provided on the rear side of the auxiliary range hood.

[0005] However, this auxiliary range hood has a single function and can only realize auxiliary exhaust of oil smoke, but cannot realize air management of the kitchen. In addition, the auxiliary range hood is often fixed in position, or the position adjustment range is small, which cannot meet the requirements of actual use. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a combined range hood to achieve air management in the kitchen in view of the deficiencies in the above-mentioned prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a combined range hood, including a main range hood and an auxiliary range hood, characterized in that:

[0008] The auxiliary range hood comprises an auxiliary fan, a first pipe for exhausting oil smoke and a second pipe for supplying air. The auxiliary fan is fluidically connected to the main range hood through the first pipe, and the auxiliary fan is fluidically connected to the outdoors through the second pipe.

[0009] By connecting the auxiliary range hood to the main range hood and the outdoors at the same time, not only can the function of exhausting oil smoke or steam be achieved, but also air can be supplied from the outdoors to the kitchen. When the range hood is working, excessive negative pressure in the room can be avoided by adding air to the room to ensure the oil fume extraction effect, or fresh air can be added to the kitchen to improve the air quality, thereby realizing air management in the kitchen.

[0010] Preferably, the main range hood comprises a main fan, and the auxiliary fan is fluidly connected to the air inlet of the main fan through a first pipe, so that the auxiliary range hood exhausts oil smoke through the main fan and then through the common flue.

[0011] In order to enable the exhaust of oil fumes and the supply of air to work independently, the auxiliary range hood also includes a one-inlet and two-outlet three-way valve, the three-way valve including a valve body, a first valve plate and a second valve plate, the auxiliary fan is arranged at the inlet of the valve body, the first pipe and the second pipe are respectively connected to one of the outlets of the valve body, the first valve plate is arranged at the connection between the first pipe and the valve body, and the second valve plate is arranged at the connection between the second pipe and the valve body.

[0012] Preferably, to prevent oil smoke from flowing back or the added air from being sucked into the main range hood, the first valve plate and the second valve plate are both one-way valves, thereby allowing one-way communication from the auxiliary fan to the first pipe and one-way communication from the second pipe to the auxiliary fan.

[0013] Preferably, to save costs, the first valve plate and the second valve plate are both one-way valves that are opened by changes in air pressure generated by the operation of the auxiliary fan.

[0014] Preferably, the auxiliary fan is an axial flow fan capable of rotating in forward and reverse directions.

[0015] Furthermore, an air filter is arranged at the end of the second pipe, thereby improving the quality of the supplementary air.

[0016] Furthermore, the auxiliary range hood also includes an air intake assembly, which includes a box with an open bottom and an air intake grille arranged at the bottom of the box. The auxiliary fan is connected to the internal fluid of the box, thereby being able to inhale oil smoke and steam and perform preliminary filtration.

[0017] In order to expand the suction and exhaust range, the first pipe and the second pipe are flexible pipes, and the air inlet assembly also includes a slide rail for sliding connection with the kitchen cabinet.

[0018] In order to automatically control the introduction of fresh air, the auxiliary range hood also includes an air quality sensor.

[0019] Compared with the prior art, the advantages of the utility model are: by connecting the auxiliary range hood to the main range hood and the outdoors at the same time, not only can the function of exhausting oil smoke or steam be realized, but also air can be supplied from the outdoors to the kitchen. When the oil fume extraction is working, excessive negative pressure in the room can be avoided and air can be supplied to the room to ensure the oil fume extraction effect, or fresh air can be supplied to the kitchen to improve the air quality, thereby realizing air management in the kitchen; the working mode of the auxiliary fan can be switched by forward and reverse rotation, and the pressure change generated by the forward and reverse rotation of the one-way valve and the auxiliary fan can be controlled. There is no need to set a separate power drive for the one-way valve, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the installation state of the combined range hood according to an embodiment of the utility model;

[0021] Figure 2 This is a cross-sectional view of the combined range hood in the installation state of the embodiment of the utility model;

[0022] Figure 3 A schematic diagram of a combined range hood according to an embodiment of the utility model;

[0023] Figure 4 A cross-sectional view of an auxiliary range hood according to an embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the exploded structure of the auxiliary range hood according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0027] See also Figure 1 to Figure 5 A combined range hood includes a main range hood 1 and an auxiliary range hood 2. The main range hood 1 and the auxiliary range hood 2 are at least partially installed under a cabinet 100 in a kitchen.

[0028] The main range hood 1 includes a main fan 11, and the auxiliary range hood 2 includes an air intake assembly 21, an auxiliary fan 22, a first pipeline 23, and a second pipeline 24. The main fan 11 is a centrifugal fan, and the auxiliary fan 22 can be an axial flow fan. Among them, the air intake assembly 21 is arranged above the cooking utensil 200 that generates oil smoke or steam, and the auxiliary fan 22 is arranged on the air intake assembly 21. The auxiliary range hood 2 also includes a three-way valve 25, which is a one-in and two-out valve. The three-way valve 25 includes a valve body 251, a first valve plate 252, and a second valve plate 253. The auxiliary fan 22 is arranged at the inlet of the valve body 251, the first pipeline 23 and the second pipeline 24 are respectively connected to one of the outlets of the valve body 251, the first valve plate 252 is arranged at the connection between the first pipeline 23 and the valve body 251, and the second valve plate 253 is arranged at the connection between the second pipeline 24 and the valve body 251. The first valve plate 252 and the second valve plate 253 are both one-way valves, which have no power themselves and are opened by the change in air pressure generated by the operation of the auxiliary fan 22 .

[0029] The first pipe 23 is connected to the main range hood 1 and is in fluid communication with the air inlet of the main fan 11, so that the main range hood 1 and the auxiliary range hood 2 can be used in coordination. The second pipe 24 is in fluid communication with the outside as a fresh air and supplementary air pipe, and an air filter 26 can be provided at the end of the second pipe 24 away from the three-way valve 25, so as to provide purified fresh outdoor air.

[0030] The air inlet assembly 21 includes a box body 211 with an open bottom, an air inlet grille 212 disposed at the bottom of the box body 211, and a slide rail 213 disposed at the top of the box body 211. The auxiliary fan 22 is in fluid communication with the inside of the box body 211. Steam or oil smoke generated by the cooking utensil 200 can enter the box body 211 through the air inlet grille 212 and be discharged through the auxiliary fan 22. The box body 211 can be slidably matched with the bottom of the corresponding cabinet 100 through the slide rail 213. Since the first pipe 23 and the second pipe 24 are both flexible pipes, the auxiliary range hood 2 is allowed to move left and right through the slide rail 213, providing a wider oil smoke suction area.

[0031] When the main range hood is not working, if the auxiliary range hood 2 is to be turned on to exhaust the oil smoke, the auxiliary range hood is started, and the auxiliary fan 22 is turned on. The positive pressure generated by the auxiliary fan 22 pushes the first valve plate 252 open, and the airflow passes through the first pipe 23 and the main range hood 1 to the public flue connected to the main range hood 1. If the auxiliary range hood 2 detects (which can be detected by setting an air quality sensor 27 on the box 211) that the air quality in the kitchen is poor, the fresh air function is turned on, and the auxiliary fan 22 of the auxiliary range hood 2 rotates in the opposite direction. The negative pressure generated thereby opens the second valve plate 253, while the first valve plate 252 is in a closed state, and the fresh air outside is transported to the room through the second pipe 24.

[0032] When the main range hood 1 is working, if the auxiliary range hood 2 is to be turned on to exhaust oil smoke, the auxiliary range hood 2 is turned on. Since the operation of the main range hood 1 generates negative pressure, it is transmitted to the auxiliary range hood 2 through the first pipe 23. At this time, the auxiliary fan 22 can be operated at a low speed. If the auxiliary range hood 2 is not turned on, the range hood will detect the negative pressure value of the kitchen and determine whether to turn on the air supply function of the auxiliary range hood 2 according to the size of the negative pressure value.

[0033] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A combined range hood, comprising a main range hood (1) and an auxiliary range hood (2), characterized in that: The auxiliary range hood (2) comprises an auxiliary fan (22), a first pipe (23) for exhausting oil smoke, and a second pipe (24) for supplying air; the auxiliary fan (22) is fluidically connected to the main range hood (1) via the first pipe (23), and the auxiliary fan (22) is fluidically connected to the outside via the second pipe (24).

2. The combined range hood according to claim 1, characterized in that: The main range hood (1) comprises a main fan (11), and the auxiliary fan (22) is fluidically connected to an air inlet of the main fan (11) via a first pipeline (23).

3. The combined range hood according to claim 1, characterized in that: The auxiliary range hood (2) further comprises a one-inlet-two-outlet three-way valve (25), the three-way valve (25) comprising a valve body (251), a first valve plate (252) and a second valve plate (253), the auxiliary fan (22) being arranged at the inlet of the valve body (251), the first pipe (23) and the second pipe (24) being respectively connected to one of the outlets of the valve body (251), the first valve plate (252) being arranged at the connection between the first pipe (23) and the valve body (251), and the second valve plate (253) being arranged at the connection between the second pipe (24) and the valve body (251).

4. The combined range hood according to claim 3, characterized in that: The first valve plate (252) and the second valve plate (253) are both one-way valves, thereby enabling one-way communication from the auxiliary fan (22) to the first pipeline (23) and one-way communication from the second pipeline (24) to the auxiliary fan (22).

5. The combined range hood according to claim 4, characterized in that: The first valve plate (252) and the second valve plate (253) are both one-way valves that are opened by changes in air pressure generated by the operation of the auxiliary fan (22).

6. The combined range hood according to claim 5, characterized in that: The auxiliary fan (22) is an axial flow fan capable of rotating in forward and reverse directions.

7. The combined range hood according to claim 1, characterized in that: An air filter (26) is provided at the end of the second duct (24).

8. The combined range hood according to claim 1, characterized in that: The auxiliary range hood (2) further comprises an air intake assembly (21), wherein the air intake assembly (21) comprises a box body (211) with an open bottom and an air intake grille (212) arranged at the bottom of the box body (211), and the auxiliary fan (22) is in fluid communication with the interior of the box body (211).

9. The combined range hood according to claim 8, characterized in that: The first pipe (23) and the second pipe (24) are flexible pipes, and the air inlet assembly (21) further comprises a slide rail (213) for being slidably connected to a kitchen cabinet (100).

10. The combined range hood according to claim 1, characterized in that: The auxiliary range hood (2) further comprises an air quality sensor (27).

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