Range hood

Abstract

The utility model discloses a range hood, which comprises a smoke collection cavity, a smoke exhaust fan, a smoke exhaust fan, a smoke exhaust fan, a smoke exhaust fan and a smoke exhaust fan, a fan is arranged in the fan device, and a smoke inlet is formed in the bottom of the fan device; the adapter structure is hollow, the lower end and the upper end of the adapter structure are connected with the smoke outlet and the smoke inlet respectively, and the shape of the cross section of the adapter structure is gradually changed from the lower end to the upper end. The range hood has the beneficial effect that the stability degree of oil fume flowing is improved.

Description

Technical Field

[0001] This utility model relates to a range hood and belongs to the technical field of kitchen appliances. Background Technology

[0002] The structure of a range hood includes a smoke collection chamber and a fan device. The bottom of the fan device is connected to the top of the smoke collection chamber. The fumes are drawn into the smoke collection chamber and flow upward to the fan device.

[0003] In the existing technology, the smoke collection chamber and the fan device have significant differences in structural shape. Their cross-sectional shapes are completely different. When the oil fumes flow from the smoke collection chamber into the fan device, the geometric abrupt change in the structure will generate turbulence, resulting in poor stability of the flow state of the oil fumes, which is not conducive to the emission of oil fumes. Utility Model Content

[0004] The purpose of this invention is to provide a range hood that improves the stability of oil fume flow.

[0005] This utility model is achieved through the following technical solution.

[0006] A range hood, comprising:

[0007] A smoke collection chamber for drawing in cooking fumes, with a smoke outlet at the top;

[0008] A fan unit, which contains a fan and has a smoke inlet at the bottom;

[0009] The transition structure is hollow, with its lower end connected to the smoke outlet and the smoke inlet, respectively. The cross-sectional shape of the transition structure gradually changes from the lower end to the upper end.

[0010] As a further improvement of this utility model, the cross-sectional area of ​​the lower end of the adapter structure is the same as the cross-sectional area of ​​the upper end of the adapter structure.

[0011] As a further improvement of this utility model, the cross-sectional area of ​​the transition structure remains unchanged from the lower end to the upper end.

[0012] As a further improvement of this utility model, both the lower and upper ends of the adapter structure are square, and the longer side of the lower end along the left-right direction is greater than the longer side of the upper end, while the wider side of the lower end along the front-back direction is less than the wider side of the upper end.

[0013] As a further improvement of this utility model, the adapter structure includes a front plate, a rear plate, and two side plates. The front plate extends from the front long side of the lower end of the adapter structure to the front long side of the upper end. The rear plate extends from the rear long side of the lower end of the adapter structure to the rear long side of the upper end. The side plates extend from the wide side of one side of the lower end of the adapter structure to the wide side of the same side of the upper end.

[0014] As a further improvement of this utility model, the rear plate of the adapter structure is arranged vertically, and the front plate is arranged inclined forward from bottom to top.

[0015] As a further improvement of this utility model, the width of the smoke collection chamber is the same as the width of the lower end of the transition structure.

[0016] As a further improvement of this utility model, the two side plates of the transition structure are inclined in the vertical direction and in opposite directions.

[0017] As a further improvement of this utility model, the two side plates of the transition structure have the same tilt angle relative to the vertical direction.

[0018] As a further improvement of this utility model, the inner surface of the adapter structure is covered with a sound-absorbing and noise-reducing layer.

[0019] The beneficial effects of this utility model are:

[0020] The transition structure between the smoke collection chamber and the fan unit has a cross-sectional shape that gradually changes from bottom to top. When the oil fumes flow into the smoke collection chamber from the bottom of the transition structure, they can flow smoothly along the inner wall of the transition structure to the top 3b, and then flow into the fan unit. The smooth transition of the oil fumes through the buffer pipe improves the stability of the flow when the oil fumes flow into the fan unit, thereby effectively avoiding turbulence. Attached Figure Description

[0021] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0022] Figure 1 This is a structural diagram of a range hood;

[0023] Figure 2 This is a front view of the range hood;

[0024] Figure 3 This is a side view of the range hood;

[0025] Figure 4 This is a cross-sectional view of a range hood. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0028] A range hood includes a smoke collection chamber 1, a fan device 2, and a connecting structure 3. The fan device 2 is located above the smoke collection chamber 1. The smoke collection chamber 1 is used to draw in cooking fumes and has a smoke outlet at its top. The fan device 2 has a fan inside and a smoke inlet at its bottom. The connecting structure 3 is a hollow structure, with its top and bottom ends connected to the smoke outlet and smoke inlet, respectively. The cross-sectional shape of the connecting structure 3 gradually changes from the lower end 3a to the upper end 3b. When the fan device 2 is turned on, it creates a negative pressure port in the smoke collection chamber 1 that can draw in cooking fumes. After entering the smoke collection chamber 1, the cooking fumes flow into the fan device 2 through the connecting structure 3.

[0029] In this embodiment, the transition structure 3 between the smoke collection chamber 1 and the fan device 2 has a cross-sectional shape that gradually changes from the lower end 3a to the upper end 3b. When the oil fumes flow from the smoke collection chamber 1 into the transition structure 3 from the lower end 3a, they can flow smoothly along the inner wall of the transition structure 3 to the upper end 3b, and then flow into the fan device 2. The smooth transition of the oil fumes' flow state through the buffer pipe can improve the stability of the flow state when the oil fumes flow into the fan device 2, thereby effectively avoiding turbulence.

[0030] In this embodiment, the cross-sectional area of ​​the lower end 3a of the transition structure 3 is the same as the cross-sectional area of ​​the upper end 3b of the transition structure 3. Therefore, the flow velocity of the oil fume flowing into the transition structure 3 is the same as the flow velocity of the oil fume flowing out of the transition structure 3, thereby improving the stability of the oil fume flow state.

[0031] In this embodiment, the cross-sectional area of ​​the transition structure 3 remains constant from the lower end 3a to the upper end 3b. Therefore, the flow velocity of the oil fume remains constant during the flow of the transition structure 3. Combined with its simple structure, it can significantly improve the airflow stability while maintaining the oil fume flow rate and average flow velocity. This achieves efficient, stable, and long-lasting smoke exhaust performance with low-cost structural optimization.

[0032] In this embodiment, the lower end 3a and the upper end 3b of the transition structure 3 are both square. The longer side of the lower end 3a in the left-right direction is greater than the longer side of the upper end 3b, and the shorter side of the lower end 3a in the front-back direction is less than the shorter side of the upper end 3b. It should be noted that the lower end 3a and the upper end 3b can also be other shapes derived from the square structure. For example, they can be polygonal structures with cut edges at the four corners, or the longer and shorter sides can be partially curved or non-linear. All such derived shapes are classified as the square shape described in this embodiment.

[0033] In this embodiment, the transition structure 3 includes a front plate 31, a rear plate 32, and two side plates 33. The front plate 31 extends from the front long side of the lower end 3a of the transition structure 3 to the front long side of the upper end 3b. The rear plate 32 extends from the rear long side of the lower end 3a of the transition structure 3 to the rear long side of the upper end 3b. The side plates 33 extend from one wide side of the lower end 3a of the transition structure 3 to the same wide side of the upper end 3b. The transition structure 3 is structurally compatible with the square shape at its upper and lower ends. Since the cross-sectional area of ​​the transition structure 3 is much smaller than that of the smoke collection chamber 1 and the fan device 2, the flow velocity of the oil fumes is higher when flowing through the transition structure 3. The angled structure formed at the connection of the front plate 31, the rear plate 32, and the two side plates 33 of the transition structure 3 forms a reinforcing component that improves the overall structural strength and can provide higher bending strength.

[0034] In this embodiment, the rear panel 32 of the transition structure 3 is vertically arranged, and the front panel 31 is inclined forward from bottom to top. The vertical arrangement of the rear panel 32 makes the back of the smoke collection chamber 1 and the fan device 2 flush. The inclination of the front panel 31 from bottom to top allows the thickness of the smoke collection chamber 1 to be less than the thickness of the fan device 2. The thinner smoke collection chamber 1 can reduce the space occupied, which is especially suitable for small kitchens or wall cabinet installations, thus improving space utilization.

[0035] In this embodiment, the width of the smoke collection chamber 1 is the same as the width of the lower end 3a of the transition structure 3, which enables the ultra-thin design of the smoke collection chamber 1. Therefore, the transition ring in this embodiment is more suitable for ultra-thin smoke hoods.

[0036] In this embodiment, the two side plates 33 of the transition structure 3 are inclined in opposite directions to the vertical direction, and the two side plates 33 have the same inclination angle relative to the vertical direction. This makes the oil fumes flowing along the two side plates 33 in the transition structure 3 have the same flow state, thereby further improving the stability of the state when the oil fumes flow through the transition structure 3.

[0037] In this embodiment, the inner surface of the transition structure 3 is covered with a sound-absorbing and noise-reducing layer. Since the oil fumes flow quickly in the transition structure 3 and the transition structure 3 has four bends, the wind noise can be reduced by setting a sound-absorbing and noise-reducing layer on the inner surface of the transition structure 3. The sound-absorbing and noise-reducing layer can be specifically set as noise-reducing cotton.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A range hood characterized by, The utility model relates to a smoke collecting cavity (1) for inhaling oil fume, the top of the smoke collecting cavity (1) has the smoke outlet, the fan device (2) is equipped with the fan in, the bottom of the fan device (2) has the smoke inlet, the adapter structure (3) is hollowly arranged, and the lower end (3a) and the upper end (3b) of the adapter structure (3) are connected with the smoke outlet and the smoke inlet respectively, and the cross section shape of the adapter structure (3) gradually changes from the lower end (3a) to the upper end (3b). The cross section area of the lower end (3a) of the adapter structure (3) is same with the cross section area of the upper end (3b) of the adapter structure (3). The cross section area of the adapter structure (3) keeps constant from the lower end (3a) to the upper end (3b). The lower end (3a) and the upper end (3b) of the adapter structure (3) are square, and the long side of the lower end (3a) along the left-right direction is greater than the long side of the upper end (3b), and the wide side of the lower end (3a) along the front-back direction is smaller than the wide side of the upper end (3b).

2. The range hood according to claim 1, characterized in that The adapter structure (3) comprises a front plate (31), a back plate (32) and two side plates (33), the front plate (31) extends from the front long side of the lower end (3a) to the front long side of the upper end (3b), the back plate (32) extends from the back long side of the lower end (3a) to the back long side of the upper end (3b), and the side plate (33) extends from the wide side of one side of the lower end (3a) to the wide side of the same side of the upper end (3b).

3. The range hood according to claim 2, characterized in that The back plate (32) of the adapter structure (3) is vertically arranged, and the front plate (31) is arranged obliquely forward from bottom to top.

4. The range hood according to claim 3, characterized in that The width of the smoke collecting cavity (1) is same with the width of the lower end (3a) of the adapter structure (3).

5. The range hood according to claim 4, wherein The two side plates (33) of the adapter structure (3) are inclined to the vertical direction, and the inclined directions are opposite.

6. The range hood according to claim 5, wherein The inclination angles of the two side plates (33) of the adapter structure (3) relative to the vertical direction are same.

7. The range hood according to claim 5, wherein The inner surface of the adapter structure (3) is covered with a sound absorbing and noise reducing layer.

8. The range hood according to claim 5, wherein, ​ 9. The range hood according to claim 8, characterized in that ​ 10. The range hood according to any one of claims 1-9, characterized in that ​

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