A volute and a fan using the same

Abstract

This utility model discloses a volute and its application in a fan. The volute includes an upper cover, a lower cover, and a mounting base plate. The lower cover includes a base plate and side plates, which together form a cavity. The upper cover includes a cover plate connected to the side plates and sealing the cavity. The base plate has an air inlet communicating with the cavity. The mounting base plate is connected to the lower cover. The lower cover further includes a lower half-exhaust plate, with both ends connected to the side plates and the middle connected to the base plate. An upper half-exhaust plate is connected to one side of the cover plate. The upper and lower half-exhaust plates are correspondingly arranged and joined together to form a circular air outlet with a diameter larger than the width of the side plates. The circular air outlet increases the exhaust area and thus the air volume of the fan without changing the thickness of the volute.

Description

Technical Field

[0001] This utility model relates to a volute and its application in fans. Background Technology

[0002] Existing fans consist of a volute and blades. The volute includes an upper cover and a lower cover. The lower cover includes a base plate and side plates, which together form a cavity where the blades are installed. The upper cover includes a cover plate connected to the side plates and sealing the cavity. The base plate has an air inlet communicating with the cavity. The base plate is connected to the lower cover. A square air outlet protrudes from one side of the cavity, with the width of the square outlet matching the width of the side plate. In this volute structure, the air outlet is too small, affecting the fan's airflow. Utility Model Content

[0003] This utility model provides a volute and its application in a fan, which solves the problem in the prior art where the air outlet of the volute is too small, affecting the air volume of the fan.

[0004] The technical solution of this utility model is implemented as follows:

[0005] The first objective of this utility model is to provide a volute housing, including a volute housing top cover, a volute housing bottom cover, and a mounting base plate. The volute housing bottom cover includes a base plate and side plates, which together form a cavity. The volute housing top cover includes a cover plate, which is connected to the side plates and seals the cavity. The base plate has an air inlet communicating with the cavity. The mounting base plate is connected to the volute housing bottom cover. The volute housing bottom cover further includes a lower half air outlet plate, with both ends of the lower half air outlet plate connected to the side plates and the middle part of the lower half air outlet plate connected to the base plate. An upper half air outlet plate is connected to one side of the cover plate. The upper half air outlet plate and the lower half air outlet plate are correspondingly arranged, and the upper half air outlet plate and the lower half air outlet plate are joined together to form a circular air outlet with a diameter greater than the width of the side plates.

[0006] The aforementioned base plate and the lower half of the air outlet plate are connected by a curved surface.

[0007] The aforementioned cover plate and the upper air outlet plate are connected by a conical surface.

[0008] The aforementioned cover plate is equipped with a pressure testing port.

[0009] The aforementioned base plate has an inwardly convex flange protruding from the outer periphery of the air inlet, and a boss protruding from the center of the mounting base plate. The boss has a through hole in the middle, which corresponds to the air inlet. An outwardly convex flange is provided around the through hole, which fits inside the inwardly convex flange. The outwardly convex flange and the inwardly convex flange are interference-fitted.

[0010] The aforementioned boss is a frustum-shaped boss.

[0011] The second objective of this utility model is to provide a fan, including a volute and a fan blade, characterized in that: the volute is the volute described above, and the fan blade is installed inside the cavity of the volute.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. The volute includes an upper volute cover, a lower volute cover, and a mounting base plate. The lower volute cover includes a base plate and side plates, which together form a cavity. The upper volute cover includes a cover plate connected to the side plates and sealing the cavity. The base plate has an air inlet communicating with the cavity. The mounting base plate is connected to the lower volute cover. The lower volute cover further includes a lower half-exhaust plate, with both ends connected to the side plates and the middle connected to the base plate. An upper half-exhaust plate is connected to one side of the cover plate. The upper and lower half-exhaust plates are correspondingly arranged, and when joined together, they form a circular air outlet with a diameter greater than the width of the side plates. The circular air outlet increases the exhaust area and thus the air volume of the fan without changing the thickness of the volute.

[0014] 2. Other advantages of this utility model are described in detail in the embodiments section. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the volute structure provided in Embodiment 1 of this utility model;

[0016] Figure 2 This is a side view of the volute.

[0017] Figure 3 This is an exploded view of the volute shell.

[0018] Figure 4 This is a schematic diagram of the structure of the upper cover of the volute.

[0019] Figure 5 This is a schematic diagram of the structure of the lower cover of the volute.

[0020] Figure 6 This is a schematic diagram of the structure in which the base plate is installed in the volute. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1:

[0023] like Figures 1 to 6 As shown, this embodiment provides a volute, including a volute upper cover 1, a volute lower cover 2, and a mounting base plate 3. The volute lower cover 2 includes a base plate 21 and a side plate 22, which together form a cavity 20. The volute upper cover 1 includes a cover plate 11, which is connected to the side plate 22 and seals the cavity 20. The base plate 21 has an air inlet 24 communicating with the cavity 20. The mounting base plate 3 is connected to the volute lower cover 2. The volute lower cover 2 further includes a lower half air outlet plate 23, which is connected to the side plate 22 at both ends and to the base plate 21 at the middle. An upper half air outlet plate 12 is connected to one side of the cover plate 11. The upper half air outlet plate 12 and the lower half air outlet plate 23 are correspondingly arranged. The upper half air outlet plate 12 and the lower half air outlet plate 23 are joined together to form a circular air outlet 4. The diameter D of the air outlet 4 is greater than the width H of the side plate 22.

[0024] The circular air outlet 4 of the volute increases the air outlet area and air volume without changing the thickness of the volute.

[0025] The aforementioned base plate 21 and the lower half of the air outlet plate 23 are connected by a curved surface 25. The curved surface 25 reduces wind resistance, allowing the air outlet 4 to discharge air smoothly.

[0026] The aforementioned cover plate 11 and the upper air outlet plate 12 are connected by a conical surface 13. The conical surface 13 can effectively reduce wind resistance.

[0027] The upper cover 1 and the lower cover 2 of the volute described above are connected by rivets 5, and the cover plate 11 is provided with a pressure measuring port 14.

[0028] The aforementioned base plate 21 has an inwardly protruding flange 26 around the air inlet 24. The mounting base plate 3 has a protruding boss 31 at its center, with a through hole 32 in the middle of the boss 31. The through hole 32 is correspondingly positioned to correspond to the air inlet 24. An outwardly protruding flange 33 is provided around the through hole 32, which fits inside the inwardly protruding flange 26 with an interference fit. The mounting base plate 3 is easy to install.

[0029] The aforementioned boss 31 is a frustum-shaped boss. The frustum-shaped boss 31 is funnel-shaped, which makes it easier to collect gas.

[0030] Example 2:

[0031] This embodiment provides a fan, including a volute 100 and a fan blade, characterized in that: the volute is the volute 100 described in Embodiment 1, and the fan blade is installed in the cavity 20 of the volute 100.

[0032] 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 modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A volute, comprising a volute upper cover (1), a volute lower cover (2), and a mounting base plate (3), wherein the volute lower cover (2) comprises a base plate (21) and a side plate (22), the base plate (21) and the side plate (22) forming a cavity (20), the volute upper cover (1) comprises a cover plate (11), the cover plate (11) is connected to the side plate (22) and seals the cavity (20), the base plate (21) is provided with an air inlet (24) communicating with the cavity (20), and the mounting base plate (3) is connected to the volute lower cover (2), characterized in that: The lower cover (2) of the volute also includes a lower half air outlet plate (23). The two ends of the lower half air outlet plate (23) are connected to the side plate (22), and the middle part of the lower half air outlet plate (23) is connected to the bottom plate (21). An upper half air outlet plate (12) is connected to one side of the cover plate (11). The upper half air outlet plate (12) and the lower half air outlet plate (23) are arranged correspondingly. The upper half air outlet plate (12) and the lower half air outlet plate (23) are joined together to form a circular air outlet (4). The diameter D of the air outlet (4) is greater than the width H of the side plate (22).

2. A volute according to claim 1, wherein: The base plate (21) and the lower half of the air outlet plate (23) are connected by an arc surface (25).

3. A volute according to claim 2, wherein: The cover plate (11) and the upper half of the air outlet plate (12) are connected by a conical surface (13).

4. A volute according to claim 3, wherein: The cover plate (11) is provided with a pressure measuring port (14).

5. A volute according to any one of claims 1 to 4, characterised in that: The base plate (21) has an inwardly protruding flange (26) around the air inlet (24). The mounting base plate (3) has a protruding boss (31) in the center. The boss (31) has a through hole (32) in the middle. The through hole (32) is corresponding to the air inlet (24). The through hole (32) has an outwardly protruding flange (33) around the through hole (32). The outwardly protruding flange (33) fits inside the inwardly protruding flange (26). The outwardly protruding flange (33) and the inwardly protruding flange (26) are interference-fitted.

6. A volute according to claim 5, characterized in that: The boss (31) is a frustum-shaped boss.

7. A fan, comprising a volute (100) and blades, characterized in that: The volute is the volute (100) as described in any one of claims 1 to 6, and the fan blade is installed in the cavity (20) of the volute (100).

Images