Range hood

Abstract

The utility model relates to a range hood, which comprises: a box body, the interior of which is hollow to form a chamber, the lower part of the chamber is provided with a smoke inlet, and the top wall of the chamber is provided with a smoke outlet; the fan system is arranged in the box body and is used for driving oil smoke airflow to be sucked into the cavity from the smoke inlet and discharged from the smoke outlet; the smoke exhaust pipe is arranged above the box body, and a lower port of the smoke exhaust pipe corresponds to the smoke outlet of the box body; the gas conveying pipe is arranged on the periphery of the smoke exhaust pipe in a sleeving mode in the circumferential direction, the inner side face of the gas conveying pipe and the outer side face of the smoke exhaust pipe are opposite in a spaced mode to form a longitudinally-through annular channel, and the lower end of the annular channel is located above the top wall of the cavity and is opposite to the top wall of the cavity in a spaced mode; and the fan is arranged in the annular channel and is used for driving external air to enter the annular channel from the opening in the upper end of the annular channel and to be output from the opening in the lower end of the annular channel. Compared with the prior art, air circulation in a kitchen can be promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a range hood. Background Art

[0002] At present, the smoke outlet of the range hood is often connected to a smoke exhaust pipe to exhaust the smoke, such as the structures disclosed in the Chinese invention patent application with application number CN202310935756.4 "A smoke exhaust system for a range hood and a control method thereof" (application publication number CN116972424A), and the Chinese invention patent application with application number CN202410132419.6 "A range hood and a control method thereof" (application publication number CN118049680A).

[0003] Most of the existing exhaust pipes are cylindrical and made of aluminum foil. The airflow noise at the corners of the exhaust pipes is relatively large. In addition, the air quality in most kitchens is poor. Although the range hood can exhaust most of the fumes generated by cooking, some fumes cannot be exhausted. In addition, the air circulation in the kitchen is poor, which affects the user's cooking experience. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a range hood which can promote air circulation in the kitchen in view of the current status of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0006] The box body is hollow inside to form a chamber, a smoke inlet is provided at the bottom of the chamber, and a smoke outlet is provided at the top wall of the chamber;

[0007] The fan system is arranged in the box body and is used to drive the oil smoke airflow to be sucked into the chamber from the smoke inlet and discharged from the smoke outlet;

[0008] The smoke exhaust pipe is arranged above the box body, and the lower end of the smoke exhaust pipe is arranged corresponding to the smoke outlet of the box body;

[0009] It is characterized by also including:

[0010] The gas delivery pipe is sleeved on the outer circumference of the smoke exhaust pipe along the circumferential direction, and the inner side surface of the gas delivery pipe and the outer side surface of the smoke exhaust pipe are spaced opposite to each other to form a longitudinally penetrating annular channel, and the lower end of the annular channel is located above the top wall of the chamber and the two are spaced opposite to each other;

[0011] The fan is arranged in the annular channel and is used for driving the outside air to enter the annular channel from the upper end opening of the annular channel and to be output from the lower end opening of the annular channel.

[0012] When the utility model is in use, the upper end opening of the annular channel can be connected to the environment in the kitchen (the external air is the air outside the range hood and in the kitchen) or to the outside (the external air is the outdoor air).

[0013] When the fan is working, it can transport the outside air to the top of the top wall of the box through the annular channel. At the same time, the fan system discharges the fumes generated by cooking through the exhaust pipe, thereby promoting the circulation of air in the kitchen.

[0014] Furthermore, since the air delivery pipe is located at the periphery of the smoke exhaust pipe, the noise generated by the airflow in the smoke exhaust pipe can be reduced.

[0015] Along the flow direction of the external air, the flow area on the cross section of the annular channel can be consistent.

[0016] Preferably, along the flow direction of the outside air, the flow area of ​​the cross section of the annular channel gradually increases, thereby reducing the flow rate of the outside air in the annular channel, allowing the outside air to flow out smoothly from the lower end opening of the annular channel, and the outflowing outside air can form a circle of wind curtain to prevent the oil smoke from overflowing and escaping during the process of being sucked into the smoke inlet.

[0017] Preferably, the fan is relatively close to the upper opening of the annular channel and relatively far from the lower opening of the annular channel, so as to facilitate the entry of outside air into the annular channel. In addition, the fan is relatively far away from the user, so the noise generated by the fan when working has little impact on the user.

[0018] Preferably, the smoke exhaust pipe has a circular cross section;

[0019] The side of the box body facing the user is the front side, and the cross-section of the air delivery pipe is elliptical, with the major axis of the ellipse extending left and right, and the minor axis of the ellipse extending front and back.

[0020] The elliptical air delivery pipe can ensure the air flow rate; at the same time, the length of the existing range hood box in the left-right direction is greater than the width in the front-back direction. The elliptical air delivery pipe in the utility model matches the outer dimensions of the box and does not affect the installation of the range hood.

[0021] Furthermore, there are at least two fans, which are arranged at intervals on both sides of the smoke exhaust pipe along the extension direction of the long axis of the ellipse. Since the space in the long axis direction of the ellipse is large and the airflow speed is slow, the fans are arranged at intervals on both sides of the smoke exhaust pipe along the extension direction of the long axis of the ellipse to promote air circulation and improve air transmission efficiency. Since the space in the short axis direction of the ellipse is small and the airflow speed is fast, no fan is needed for drainage.

[0022] Fans can be added in other places if needed. Fans can also be added in the up and down directions as needed.

[0023] Preferably, the inner diameter of the smoke exhaust pipe is 160-180 mm;

[0024] The radial distance between the upper edge of the gas delivery pipe and the outer side of the smoke exhaust pipe is 30 to 60 mm;

[0025] The radial distance between the lower end edge of the gas delivery pipe and the outer side surface of the smoke exhaust pipe is 120 to 300 mm.

[0026] In the above solution, preferably, the projection of the lower end of the gas delivery pipe on the top wall of the box is located inside the edge of the top wall and relatively close to the edge of the top wall, thereby further ensuring the gas delivery volume and facilitating the formation of the wind curtain.

[0027] Furthermore, the distance between the lower end of the gas delivery pipe and the top wall of the box body is 50-200 mm, thereby ensuring a certain exhaust space.

[0028] In the above schemes, preferably, a filter with filter holes is provided at the upper and / or lower openings of the annular channel. The filter can prevent foreign matter from entering the annular channel. The filter is located between the gas pipe and the smoke exhaust pipe, which can constrain the relative position between the gas pipe and the smoke exhaust pipe and improve the overall structural stability. At the same time, the filter of the utility model can also use an activated carbon filter, a HEPA filter, etc. to improve the air filtration effect.

[0029] Furthermore, the filter holes are hexagonal, and the side length of the hexagon is 5 to 10 mm, so as to ensure a certain ventilation area.

[0030] In the above schemes, in order to further reduce noise, preferably, a noise reduction pipe is also included, which is circumferentially sleeved on the outer periphery of the gas pipe, and the pipe wall of the noise reduction pipe is vacuum.

[0031] Preferably, the wall thickness of the noise reduction pipe is 10-15 mm.

[0032] Preferably, the front side wall of the box body is tilted backward from top to bottom, and is provided with the above-mentioned smoke inlet and a smoke baffle that can open and close the smoke inlet. When the smoke inlet is open, the smoke baffle is located above the smoke inlet and tilted forward from top to bottom.

[0033] The structure and position design of the gas pipe and the smoke shield in the utility model enable the wind curtain formed at the lower end of the gas pipe to effectively prevent the escape of oil smoke and prevent the oil smoke from escaping after hitting the smoke shield.

[0034] Compared with the prior art, the utility model has the advantages that: by providing an air supply pipe and a fan, the air supply pipe is sleeved on the outer periphery of the smoke exhaust pipe and an annular channel is formed between the two. Thus, when the fan is working, the outside air can be transported to the top of the top wall of the box through the annular channel. At the same time, the fan system discharges the fumes generated by cooking through the smoke exhaust pipe, thereby promoting the circulation of air in the kitchen.

[0035] Furthermore, since the air delivery pipe is located at the periphery of the smoke exhaust pipe, the noise generated by the airflow in the smoke exhaust pipe can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0037] Figure 2 It is a cross-sectional view of an embodiment of the utility model (the cross-section is a vertical plane extending front and back);

[0038] Figure 3 It is a cross-sectional view of an embodiment of the utility model (the cross-section is a vertical plane extending left and right). DETAILED DESCRIPTION

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] like Figures 1 to 3 As shown, a preferred embodiment of a range hood of the utility model is shown, and the range hood includes a housing 1, a fan system, a smoke exhaust pipe 2, an air supply pipe 3, a fan 4, a filter 5 and a noise reduction pipe 6.

[0041] The side of the box body 1 facing the user is the front side. The box body 1 is hollow inside to form a chamber 10. The front side wall of the chamber 10 is tilted backward from top to bottom and is provided with a smoke inlet 10a. A smoke baffle 11 capable of opening and closing the smoke inlet 10a is provided at the smoke inlet 10a. The smoke baffle 11 is rotatably arranged at the smoke inlet around its upper edge extending to the left and right or an axis adjacent to the upper edge. When the smoke inlet 10a is open, the smoke baffle 11 is located above the smoke inlet 10a and tilted forward from top to bottom. A smoke outlet 10b is provided at the center of the top wall of the chamber 10.

[0042] The fan system is arranged in the box 1, and is used to drive the oil smoke flow into the chamber 10 through the smoke inlet 10a and discharged through the smoke outlet 10b. In this embodiment, the fan system adopts an existing centrifugal fan, and its structure and installation position refer to the existing technology, which will not be described here, and is not shown in the figure.

[0043] The exhaust pipe 2 is arranged above the box 1, and the lower end of the exhaust pipe 2 is arranged corresponding to the smoke outlet 10b of the box 1, so that the exhaust pipe is connected to the chamber 10 in the box 1, and the upper end of the exhaust pipe 2 is connected to the outdoor environment. In this embodiment, the cross section of the exhaust pipe 2 is circular, and the inner diameter of the exhaust pipe 2 is 160 to 180 mm (the inner diameter of the exhaust pipe 2 can be any value between 160 and 180 mm, such as 160 mm, 170 mm, 180 mm, etc.).

[0044] The air delivery pipe 3 is circumferentially sleeved on the outer periphery of the smoke exhaust pipe 2, and the inner side of the air delivery pipe 3 is spaced opposite to the outer side of the smoke exhaust pipe 2 to form a longitudinally through annular channel 30. The fan 4 is arranged in the annular channel 30, and is used to drive the outside air into the annular channel 30 from the upper end opening of the annular channel 30 and output from the lower end opening of the annular channel 30. In this embodiment, the cross section of the air delivery pipe 3 is elliptical, and the long axis of the ellipse extends left and right, and the short axis of the ellipse extends front and back. Along the flow direction of the outside air, the flow area on the cross section of the annular channel 30 gradually increases. At the same time, the upper end of the air delivery pipe 3 is connected to the outdoor environment and is 500 to 800 mm lower than the upper end of the smoke exhaust pipe 2, ensuring that the smoke exhaust will not affect the quality of the input air; the lower end of the air delivery pipe 3 is located above the box body 1 and is 50 to 200 mm away from the top wall of the box body 1, ensuring a certain exhaust space. At the same time, the radial distance between the upper edge of the gas pipe 3 and the outer side of the smoke exhaust pipe 2 is 30-60 mm (can be any value between 30-60 mm, such as 30 mm, 40 mm, 50 mm, 60 mm, etc.); the radial distance between the lower edge of the gas pipe 3 and the outer side of the smoke exhaust pipe 2 is 120-300 mm (can be any value between 120-300 mm, such as 120 mm, 150 mm, 200 mm, 300 mm, etc.). And the projection of the lower end of the gas pipe 3 on the top wall of the box body 1 is located inside the edge of the top wall and relatively adjacent to the edge of the top wall.

[0045] At the same time, if Figure 3 As shown, the fan 4 of this embodiment is relatively open at the upper end close to the annular channel 30 and relatively open at the lower end far from the annular channel 30. There are two fans 4, which are spaced apart on both sides of the smoke exhaust pipe 2 along the extension direction of the ellipse major axis.

[0046] There are two filter screens 5, which are respectively arranged at the upper and lower open ends of the annular channel 30, and are connected to the smoke exhaust pipe 2 and the gas delivery pipe 3. Each filter screen 5 is evenly distributed with a plurality of filter holes 50, and a single filter hole 50 is hexagonal, and the side length of the hexagon is 5 to 10 mm (it can be any value between 5 and 10 mm, such as 5 mm, 7 mm, 9 mm, 10 mm, etc.).

[0047] The above-mentioned noise reduction pipe 6 is circumferentially sleeved on the outer circumference of the gas transmission pipe 3, and the wall thickness of the noise reduction pipe 6 is 10-15mm (it can be any value between 10-15mm, such as 10mm, 11mm, 12mm, 15mm, etc.), and the wall is vacuum to achieve the noise reduction function.

[0048] When the fan 4 is working, the outside air can be delivered to the top of the top wall of the box body 1 through the annular channel 30. At the same time, the fan system exhausts the fumes generated by cooking through the exhaust pipe 2, thereby promoting the circulation of air in the kitchen.

[0049] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "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, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood, comprising: The box body (1) is hollow inside and has a chamber (10), a smoke inlet (10a) is provided at the bottom of the chamber (10), and a smoke outlet (10b) is provided at the top wall of the chamber (10); A fan system is arranged in the box body (1) and is used to drive the oil smoke flow to be sucked into the chamber (10) through the smoke inlet (10a) and discharged through the smoke outlet (10b); A smoke exhaust pipe (2) is arranged above the box body (1), and a lower end of the smoke exhaust pipe (2) is arranged corresponding to a smoke outlet (10b) of the box body (1); Features Also included are: The gas delivery pipe (3) is sleeved on the outer circumference of the smoke exhaust pipe (2) along the circumferential direction, and the inner side surface of the gas delivery pipe (3) and the outer side surface of the smoke exhaust pipe (2) are spaced apart and opposite to each other to form a longitudinally penetrating annular channel (30), and the lower end of the annular channel (30) is located above the top wall of the chamber (10) and the two are spaced apart and opposite to each other; The fan (4) is arranged in the annular channel (30) and is used to drive external air into the annular channel (30) from the upper end opening of the annular channel (30) and to be output from the lower end opening of the annular channel (30).

2. The range hood according to claim 1, characterized in that: Along the flow direction of the external air, the flow area on the cross section of the annular channel (30) gradually increases.

3. The range hood according to claim 2, characterized in that: The fan (4) is open at an upper end relatively close to the annular channel (30) and is open at a lower end relatively far from the annular channel (30).

4. The range hood according to claim 2, characterized in that: The smoke exhaust pipe (2) has a circular cross section; The side of the box body (1) facing the user is the front side, and the cross section of the gas delivery pipe (3) is elliptical, with the major axis of the ellipse extending left and right, and the minor axis of the ellipse extending front and back.

5. The range hood according to claim 4, characterized in that: There are at least two fans (4), which are arranged at intervals on both sides of the smoke exhaust pipe (2) along the extension direction of the major axis of the ellipse.

6. The range hood according to claim 4, characterized in that: The inner diameter of the smoke exhaust pipe (2) is 160 to 180 mm; The radial distance between the upper edge of the gas delivery pipe (3) and the outer side of the smoke exhaust pipe (2) is 30 to 60 mm; The radial distance between the lower end edge of the gas delivery pipe (3) and the outer side surface of the smoke exhaust pipe (2) is 120 to 300 mm.

7. The range hood according to claim 2, characterized in that: The projection of the lower end of the gas delivery pipe (3) on the top wall of the box body (1) is located inside the edge of the top wall and relatively close to the edge of the top wall.

8. The range hood according to claim 7, characterized in that: The distance between the lower end of the gas delivery pipe (3) and the top wall of the box body (1) is 50 to 200 mm.

9. The range hood according to any one of claims 1 to 8, characterized in that: A filter screen (5) with filter holes (50) is provided at the upper open end and / or the lower open end of the annular channel (30).

10. The range hood according to claim 9, characterized in that: The filter hole (50) is hexagonal, and the side length of the hexagon is 5 to 10 mm.

11. The range hood according to any one of claims 1 to 8, characterized in that: It also includes a noise reduction pipe (6) which is sleeved on the outer periphery of the gas delivery pipe (3) in the circumferential direction, and the pipe wall of the noise reduction pipe (6) is vacuum.

12. The range hood according to claim 11, characterized in that: The wall thickness of the noise reduction pipe (6) is 10 to 15 mm.

13. The range hood according to any one of claims 1 to 8, characterized in that: The front side wall of the box body (1) is tilted backward from top to bottom and is provided with the above-mentioned smoke inlet (10a) and a smoke baffle (11) capable of opening and closing the smoke inlet (10a); when the smoke inlet (10a) is in an open state, the smoke baffle (11) is located above the smoke inlet (10a) and tilted forward from top to bottom.

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