Fan volute and range hood

Abstract

The utility model provides a fan volute and a range hood. The fan volute comprises a body and an outlet pipe, the outlet pipe comprises a first section, a second section and a third section which are sequentially connected in the air outlet direction. A first section is formed between the first section and the second section, a second section is formed between the second section and the third section, and a third section is formed at the air outlet end of the third section; the first section is rectangular, and the third section is circular; the sectional area of the second section is gradually reduced in the air outlet direction, and the sectional area of the third section is gradually increased in the air outlet direction. According to the fan volute and the range hood provided by the utility model, an air outlet seat can be reduced, the installation process is simplified, and the oil leakage phenomenon at the joint of the fan and the air outlet seat can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a fan volute and a range hood. Background Art

[0002] Currently, there is a split-type ceiling range hood that installs the fan part on the kitchen ceiling, moving the noise source away from the user and achieving the purpose of noise reduction. However, the fan's horizontal air flow makes oil leakage at the connection between the air outlet and the fan difficult to solve.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The purpose of the utility model is to provide a fan volute, which can reduce the number of air outlet seats, simplify the installation process, and avoid oil leakage at the connection between the fan and the air outlet seat.

[0005] Another object of the present invention is to provide a range hood comprising the above-mentioned fan volute, so that the range hood is both light and durable, easy to install and can avoid oil leakage at the connection between the fan and the air outlet seat.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A fan volute comprises a main body and an outlet pipe; the outlet pipe comprises a first section, a second section and a third section connected in sequence along the air outlet direction; a first cross-section is formed between the first section and the second section, a second cross-section is formed between the second section and the third section, and a third cross-section is formed at the air outlet end of the third section; the first cross-section is rectangular, and the third cross-section is circular; the cross-sectional area of ​​the second section gradually decreases along the air outlet direction, and the cross-sectional area of ​​the third section gradually increases along the air outlet direction.

[0008] According to one embodiment of the present utility model, the first section, the second section and the third section all have a width in the horizontal direction and a height in the vertical direction, the height of the second section is smaller than the height of the first section, the height of the third section is larger than the heights of the second section and the first section, and the second section forms a Venturi structure in the air outlet direction; the widths of the first section, the second section and the third section gradually increase along the air outlet direction.

[0009] According to one embodiment of the present invention, the top and bottom of the longitudinal section of the third section are arc-shaped.

[0010] According to one embodiment of the present invention, the distance between the first cross section and the third cross section is d, and 10 mm < d < 100 mm.

[0011] According to one embodiment of the present invention, the air outlet end of the third section extends outward and is provided with a pipe mouth section of equal diameter; the side of the third section away from the main body is parallel to the outer side of the pipe mouth section, and the side of the third section close to the main body forms an angle α with the inner side of the pipe mouth section, and 150°<α<180°.

[0012] According to one embodiment of the present invention, the fan volute includes an upper shell and a lower shell, and the upper shell and the lower shell together form the main body and the outlet pipe; the upper shell and the lower shell are fixedly connected by snaps and / or screws.

[0013] According to one embodiment of the present invention, the upper shell and / or the lower shell are integrally formed.

[0014] According to one embodiment of the present invention, the fan volute is made of plastic.

[0015] The utility model also provides a range hood, comprising the above-mentioned fan volute.

[0016] According to one embodiment of the present invention, the range hood includes a smoke hood and a bellows; the bellows is arranged on the kitchen ceiling and is connected to the smoke hood through a telescopic smoke duct; a fan with horizontal air outlet is provided in the bellows, and the fan includes the fan volute and a wind wheel arranged in the fan volute.

[0017] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are:

[0018] The fan volute and range hood provided by the embodiment of the present invention are suitable for fans with horizontal air outlet (the outlet pipe is horizontal), and are provided with a transition area formed by a second section and a third section. In this transition area, the flow cross-section smoothly transitions from a rectangle (first section) to a circle (third section), so that the outlet pipe and the air outlet seat are integrated, reducing the existing air outlet seat part, simplifying the installation process, and eliminating the need for connection between the existing outlet pipe and the air outlet seat, thereby avoiding oil leakage at the connection between the fan (especially the metal volute) and the air outlet seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present invention are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention.

[0020] Figure 1 A schematic structural diagram of a fan volute provided in an embodiment of the present utility model;

[0021] Figure 2A top view of a fan volute provided in an embodiment of the present utility model;

[0022] Figure 3 A side view of the outlet pipe of the fan volute provided in an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 Cross-sectional view in the AA direction;

[0024] Figure 5 for Figure 3 Cross-sectional view in the middle BB direction;

[0025] Figure 6 This is a structural schematic diagram of a range hood provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 1. Main body; 2. Outlet pipe; 21. First section; 22. Second section; 23. Third section; 24. First section; 25. Second section; 26. Third section; 27. Pipe mouth section; 3. Upper shell; 4. Lower shell; 5. Smoke hood; 6. Bellows; 7. Telescopic smoke pipe; 8. Wind wheel. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with examples. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present invention encompass such modifications and variations as come within the scope of the appended claims and their equivalents.

[0029] In the description of the present invention, the words "first", "second" and similar terms do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "include" or "comprises" and similar terms mean that the element or object preceding the word includes the elements or objects listed after the word and their equivalents, but does not exclude other elements or objects. The terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and other directions or positions are based on the directions or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense. For example, they can mean fixed connection or detachable connection; direct connection or indirect connection through an intermediate component; wired electrical connection, radio connection, or wireless communication signal connection. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0030] like Figure 1 、 Figure 2 、 Figure 3 As shown, the embodiment of the present invention provides a fan volute, including a body 1 and an outlet pipe 2. For the convenience of description, the fan is defined as being placed horizontally (the rotating shaft of the fan wheel 8 is in a vertical direction), and Figure 1 The upper portion is "up" and the lower portion is "down." The outlet pipe 2 includes a first section 21, a second section 22, and a third section 23, which are sequentially connected along the outlet direction. A first cross-section 24 is formed between the first section 21 and the second section 22, a second cross-section 25 is formed between the second section 22 and the third section 23, and a third cross-section 26 is formed at the outlet end of the third section 23. The first cross-section 24 is rectangular, and the third cross-section 26 is circular. The cross-sectional area of ​​the second section 22 gradually decreases along the outlet direction, while the cross-sectional area of ​​the third section 23 gradually increases along the outlet direction.

[0031] The fan volute provided in the embodiment of the present invention is suitable for fans with lateral air outlet (the outlet pipe 2 is horizontal), and is provided with a transition area formed by the second section 22 and the third section 23. In this transition area, the flow cross-section smoothly transitions from a rectangle (the first section 24) to a circle (the third section 26), so that the outlet pipe 2 and the air outlet seat are integrated, reducing the existing air outlet seat part, simplifying the installation process, and eliminating the need for the existing connection between the outlet pipe 2 and the air outlet seat, thereby avoiding oil leakage at the connection between the fan (especially the metal volute) and the air outlet seat.

[0032] In one embodiment of the present invention, Figure 3 、 Figure 4 As shown, the first section 24, the second section 25 and the third section 26 all have a width in the horizontal direction and a height in the vertical direction. The height of the second section 25 is less than the height of the first section 24, and the height of the third section 26 is greater than the heights of the second section 25 and the first section 24. The second section 25 forms a Venturi structure in the air outlet direction. The widths of the first section 24, the second section 25 and the third section 26 gradually increase along the air outlet direction. In this embodiment, the second section 25 forms a Venturi structure in the direction of airflow. The direction of the arrow in the figure is the direction of airflow. When the airflow flows from the first section 24 to the second section 25, it contracts and accelerates in the height direction. The airflow is diffused in the width direction by pressure, which can reduce the flow separation and vortex in the width direction, thereby achieving the effect of reducing drag and noise.

[0033] like Figure 3 、 Figure 4 As shown, further, the top and bottom of the longitudinal section of the third section 23 are arc-shaped, so that when the airflow flows from the second section 25 to the third section 26, the airflow is affected by the Coanda effect and decelerates and expands to the upper and lower sides to reach the third section 26.

[0034] In an embodiment of the present invention, a distance d is defined between the first cross section 24 and the third cross section 26 , and 10 mm < d < 100 mm.

[0035] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 As shown in FIG. 1 , in one embodiment of the present invention, the outlet end of the third section 23 is extended outwardly to form a nozzle section 27 of equal diameter. The cross section of the nozzle section 27 is the same as that of the third cross section 26 and is also circular. Figure 2 、 Figure 5 As shown, the side of the third section 23 away from the main body 1 is parallel to the outer side of the nozzle section 27, and the side of the third section 23 close to the main body 1 forms an angle α with the inner side of the nozzle section 27, and 150°<α<180°. The direction of the arrow in the figure is the direction of airflow.

[0036] like Figure 1 As shown, in one embodiment of the present invention, the fan volute includes an upper shell 3 and a lower shell 4. The upper shell 3 and the lower shell 4 together form the body 1 and the outlet pipe 2. The upper shell 3 and the lower shell 4 are fixedly connected by snaps and / or screws. Furthermore, the upper shell 3 and / or the lower shell 4 are integrally formed.

[0037] In one embodiment of the present invention, the fan volute is made of plastic material, which is convenient for connection with other plastic pipe fittings, thereby avoiding the problems of inconvenient connection and poor sealing between metal materials and plastic pipe fittings.

[0038] like Figure 6 As shown, the embodiment of the present invention also provides a range hood, including the above-mentioned fan volute. Specifically, the range hood is a split type, including a smoke hood 5 and a bellows 6. The smoke hood 5 is installed above the stove, and the bellows 6 is installed on the kitchen ceiling and connected to the smoke hood 5 through a telescopic smoke pipe 7. The bellows 6 is equipped with a horizontally placed fan, such as Figure 1 As shown, the fan includes the above-mentioned fan volute and a wind wheel 8 arranged in the fan volute.

[0039] The range hood provided by the embodiment of the present invention is provided with the above-mentioned fan volute, so that its outlet pipe and the air outlet seat are integrated, reducing the existing air outlet seat part, simplifying the installation process, and eliminating the need for connection between the existing outlet pipe and the air outlet seat, thereby avoiding oil leakage at the connection between the fan (especially the metal volute) and the air outlet seat.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fan volute, characterized in that: The invention comprises a body (1) and an outlet pipe (2); the outlet pipe (2) comprises a first section (21), a second section (22) and a third section (23) connected in sequence along the air outlet direction; a first cross section (24) is formed between the first section (21) and the second section (22), a second cross section (25) is formed between the second section (22) and the third section (23), and a third cross section (26) is formed at the air outlet end of the third section (23); the first cross section (24) is rectangular, and the third cross section (26) is circular; the cross section area of ​​the second section (22) gradually decreases along the air outlet direction, and the cross section area of ​​the third section (23) gradually increases along the air outlet direction.

2. The fan volute according to claim 1, characterized in that: The first section (24), the second section (25) and the third section (26) all have a width in the horizontal direction and a height in the vertical direction, the height of the second section (25) is smaller than the height of the first section (24), the height of the third section (26) is larger than the heights of the second section (25) and the first section (24), and the second section (25) forms a Venturi structure in the air outlet direction; the widths of the first section (24), the second section (25) and the third section (26) gradually increase along the air outlet direction.

3. The fan volute according to claim 2, characterized in that: The top and bottom of the longitudinal section of the third section (23) are in arc shape.

4. The fan volute according to claim 1, 2 or 3, characterized in that: The distance between the first cross section (24) and the third cross section (26) is d, and 10 mm < d < 100 mm.

5. The fan volute according to claim 4, characterized in that: The air outlet end of the third section (23) extends outward and is provided with a pipe mouth section (27) of equal diameter; the side of the third section (23) away from the main body (1) is parallel to the outer side of the pipe mouth section (27); the side of the third section (23) close to the main body (1) forms an angle α with the inner side of the pipe mouth section (27), and 150°<α<180°.

6. The fan volute according to claim 1, characterized in that: It comprises an upper shell (3) and a lower shell (4), wherein the upper shell (3) and the lower shell (4) together form the body (1) and the outlet pipe (2); the upper shell (3) and the lower shell (4) are fixedly connected by buckles and / or screws.

7. The fan volute according to claim 6, characterized in that: The upper shell (3) and / or the lower shell (4) are integrally formed.

8. The fan volute according to claim 1, characterized in that: The fan volute is made of plastic.

9. A range hood, characterized in that: The invention comprises a fan volute according to any one of claims 1 to 8.

10. The range hood according to claim 9, characterized in that: The utility model comprises a smoke collecting hood (5) and a bellows (6); the bellows (6) is arranged on the kitchen ceiling and is connected to the smoke collecting hood (5) via a telescopic smoke pipe (7); a horizontal air-discharging fan is arranged in the bellows (6), and the fan comprises a fan volute and a wind wheel (8) arranged in the fan volute.

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