Anti-blocking device for air inlet of fan

Abstract

The utility model provides an anti-blocking device for an air inlet of a fan, which relates to the technical field of fans and comprises an anti-blocking box, the anti-blocking box at least comprises a front surface with a screen structure and a peripheral side surface, one side of the anti-blocking box is connected with an inlet of the fan, and the front surface with the screen structure and the peripheral side surface are positioned outside the inlet of the fan. The anti-blocking box at least provided with the screen structures on the front face and the peripheral side faces is installed outside the inlet of the draught fan for filtering, and the problem that the air inlet of the draught fan is prone to being blocked by sundries can be solved. The anti-blocking box is at least provided with the screen structures on the front face and the peripheral side faces, so that the area of the air inlet is large, even if part of the area is adsorbed and shielded by sundries such as paper, air can still enter a large-area area, and the situation that the air inlet amount of the fan is affected due to the fact that the anti-blocking cover adsorbs the sundries is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan inlet anti-blocking device. Background Technology

[0002] When the fan is running, if the air inlet is not equipped with an anti-blocking device, it is very easy to suck in debris such as plastic film and paper floating in the air and block the air duct, which can lead to damage to the fan in severe cases.

[0003] In the prior art, some products use an anti-clogging cover installed at the fan inlet to filter out debris and prevent it from being sucked into the fan. For example, Chinese patent CN218207220U, which was authorized and announced on January 3, 2023.

[0004] However, the anti-clogging cover of this type of product is set directly at the air outlet, which results in a small air inlet area and a small air intake area. When debris is adsorbed outside the anti-clogging cover, it will affect the air intake volume. Utility Model Content

[0005] The purpose of this invention is to provide a fan inlet anti-blocking device that can effectively solve the problem of blocked fan inlets installed outdoors.

[0006] This utility model provides a fan inlet anti-blocking device, including an anti-blocking box. The anti-blocking box includes at least a front and surrounding sides with a screen structure. One side of the anti-blocking box is connected to the fan inlet, and the front and surrounding sides with the screen structure are located outside the fan inlet.

[0007] Furthermore, the anti-clogging box includes a retainer and a screen, the screen being wrapped around the support frame.

[0008] Furthermore, the anti-blocking box also includes a connecting back plate, which is connected to the fan inlet, and an air inlet is provided on the connecting back plate at the position corresponding to the fan inlet.

[0009] Furthermore, the retainer is a cuboid frame.

[0010] Furthermore, the screen is wrapped around the front and four sides of the retainer, and the back end of the retainer is fixedly connected to the connecting back plate.

[0011] Furthermore, the retainer is a cylindrical frame, the screen is wrapped around the front and outer peripheral sides of the retainer, and the back end of the retainer is fixedly connected to the connecting back plate.

[0012] Furthermore, the front of the retainer is open to form a door frame, a door frame is hinged to one side of the door frame, a locking device is provided between one side of the door frame and the door frame, and the screen is wrapped around the outside of the door frame.

[0013] Furthermore, there is a gap between the screen at the bottom of the retainer and the ground, and a support frame is provided at the bottom of the retainer, with the top and sides of the support frame being open structures.

[0014] Furthermore, the connecting back plate includes a connecting area and an air inlet area. The connecting area is connected to the fan inlet, and the air inlet area is located around the connecting area. The air inlet area is provided with air inlet holes.

[0015] Furthermore, an annular connecting plate is connected to the back side of the connecting back plate, and a connecting flange is provided on the fan inlet. The annular connecting plate and the connecting flange are connected by a plurality of connecting bolts that circumferentially surround the fan.

[0016] The technical solution of this utility model solves the problem of easy blockage of the fan inlet by using an anti-clogging box with at least a front and surrounding side screen structure, installed outside the fan inlet for filtration. Furthermore, because the anti-clogging box has a screen structure on at least the front and surrounding sides, the inlet area is large. Even if some areas are blocked by paper or other debris, a large area can still allow air to enter, and the fan's airflow will not be affected by the anti-clogging cover absorbing debris. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Enlarged view of point A;

[0020] Figure 3 This is a schematic diagram of the overall structure of this utility model from another perspective;

[0021] Figure 4 This is a schematic diagram of the internal structure of the anti-blocking box of this utility model;

[0022] Figure 5 This is a schematic diagram of the door frame and door frame of this utility model;

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Anti-clogging box; 101-Cage; 102-Screen; 103-Connecting back plate;

[0025] 2-Fan inlet; 201-Connecting flange;

[0026] 3-Support frame;

[0027] 4-Connection area; 401-Annular connecting plate; 402-Bolt;

[0028] 5 - Air intake area; 501 - Air intake hole;

[0029] 6-Door frame; 7-Door frame; 8-Hinge; 9-Lock device. Detailed Implementation

[0030] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. 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.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1

[0034] like Figures 1-5As shown, this utility model provides a fan inlet anti-blocking device, including an anti-blocking box 1. The anti-blocking box 1 includes at least a front and surrounding sides with a screen structure. One side of the anti-blocking box 1 is connected to the fan inlet 2, and the front and surrounding sides with the screen structure are located outside the fan inlet 2.

[0035] Specifically, the anti-clogging box 1 is installed at the fan inlet 2 and located outside the fan inlet 2. Its volume is much larger than the cross-sectional size of the fan inlet 2 pipe. When the fan draws air, the air passes through the screen structure into the anti-clogging box 1 and then into the fan inlet 2. Debris is blocked outside by the screen structure, which solves the problem of the fan inlet being easily blocked by debris. Since the anti-clogging box 1 has screen structures on at least the front and four sides, the air inlet can draw air from all sides with screen structures. Compared to air that can only be drawn from the screen structure inside the air inlet, the air inlet area of ​​this utility model is greatly increased. Even if some areas are blocked by paper or other debris, there are still other large areas of screen structure that can allow air to enter, and the air intake of the fan will not be affected by the anti-clogging box absorbing debris.

[0036] This device can be made of different materials depending on the usage environment. It can also be equipped with a side-opening door. After installation, the fan can draw air from all directions, and the air inlet will no longer be blocked by debris.

[0037] Example 2

[0038] The anti-clogging box 1 includes a retainer 101 and a screen 102, with the screen 102 wrapped around a support frame 3. There is a gap between the screen 102 at the bottom of the retainer 101 and the ground. The support frame 3 is located at the bottom of the retainer 101, and its top and sides are open. The anti-clogging box 1 also includes a connecting back plate 103, which is connected to the fan inlet 2, and has an air inlet on the connecting back plate 103 corresponding to the position of the fan inlet 2.

[0039] Specifically, the retainer 101 is an open frame structure, allowing air to enter and filter from all sides after the screen 102 is wrapped around it. The retainer 101 supports the inside of the screen 102, maintaining its shape. The support frame 3 is supported at the bottom of the retainer 101, providing not only support but also allowing air to enter from the bottom due to the spacing between the bottom of the retainer 101 and the bottom surface, thus increasing the air intake area. The back end of the retainer 101 is fixedly connected to the connecting back plate 103, which in turn securely connects to the fan inlet 2.

[0040] In addition, a screen 102 can be installed at the air inlet on the connecting back panel 103 for secondary filtration.

[0041] Example 3

[0042] The retainer 101 is a cuboid frame. The screen 102 is wrapped around the front and four sides of the retainer 101, and the back end of the retainer 101 is fixedly connected to the connecting back plate 103.

[0043] Specifically, in this embodiment, the retainer 101 adopts a cuboid structure, and the anti-clogging box 1 formed by it wraps the screen 102 on the front and all four sides.

[0044] Example 4

[0045] The retainer 101 is a cylindrical frame (not shown). The screen 102 is wrapped around the front and outer peripheral sides of the retainer 101, and the back end of the retainer 101 is fixedly connected to the connecting back plate 103.

[0046] Specifically, in this embodiment, the retainer 101 adopts a cylindrical structure, and the anti-clogging box 1 formed by it wraps the screen 102 on the front and surrounding curved surfaces.

[0047] Example 5

[0048] like Figure 5 As shown, the front of the retainer is open to form a door frame 6. A door frame 7 is hinged to one side of the door frame 6. A locking device 9 is provided between one side of the door frame 7 and the door frame 6. A screen 102 is wrapped around the outside of the door frame 7.

[0049] Specifically, the retainer 101 can be opened via the door frame 6 and the gantry 7 structure, facilitating operations inside the retainer 101, such as cleaning the fan inlet 2. The left side of the gantry 7 is hinged to the door frame 6 via a hinge 8 or similar structure, and the right side of the gantry 7 is fastened to the locking ring on the door frame 6 via a buckle. It can then be closed by inserting a pin or attaching a lock.

[0050] Example 6

[0051] The connecting back plate 103 includes a connecting area 4 and an air inlet area 5. The connecting area 4 is connected to the fan inlet 2, and the air inlet area 5 is located around the connecting area 4. The air inlet area 5 is provided with air inlet holes 501. An annular connecting plate 401 is connected to the back side of the connecting back plate 103. A connecting flange 201 is provided on the fan inlet 2. The annular connecting plate 401 and the connecting flange 201 are connected by a plurality of connecting bolts 402 that circumferentially surround the fan.

[0052] Specifically, the connecting backplate 103 can be a steel plate or an iron plate to improve the stability of the connection with the fan inlet 2. The air inlet area 5 can be further increased in terms of air inlet area.

[0053] The annular connecting plate 401 includes a first annular plate connected to the back side of the connecting back plate 103 and a second annular plate connected to the back side of the first annular plate. The annular width of the second annular plate is smaller than that of the first annular plate. A plurality of first connecting holes are arranged around the first annular plate and the second annular plate at corresponding positions in the circumference. A plurality of connecting strips are arranged along the circumference of the first annular plate and the second annular plate at positions corresponding to the connecting holes. The connecting strips are provided with second connecting holes corresponding to the first connecting holes on the first annular plate and the second annular plate, respectively. Connecting short rods are inserted into and welded into the first connecting holes and the second connecting holes at the same positions to fix the first annular plate and the second annular plate together.

[0054] Multiple bolts are welded around the second annular plate in a circumferential direction. Multiple holes are opened around the connecting flange 201 in a circumferential direction. Bolts 402 are inserted into the holes and nuts are connected to the protruding ends to achieve a detachable connection between the second annular plate and the connecting flange 201.

[0055] The working method and principle of this device:

[0056] When the fan draws air, the air passes through the screen 102 into the anti-clogging box 1 and then into the fan inlet 2. Debris is blocked by the screen 102, solving the problem of the fan inlet being easily clogged by debris. Since the anti-clogging box 1 has screens 102 on at least the front and all four sides, the inlet can draw air from all surfaces with screens 102. Compared to designs where air can only be drawn from the screens 102 inside the inlet, the area of ​​the inlet in this invention is greatly increased. Even if some areas are blocked by paper or other debris, other large areas of the screen 102 can still allow air to enter, preventing the anti-clogging cover from accumulating debris and affecting the fan's airflow.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. 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 fan air inlet anti-blocking device, characterized in that, The anti-blocking box comprises a front face and surrounding side face with a screen structure, one side of the anti-blocking box is connected with a fan inlet, and the front face and surrounding side face with a screen structure are located outside the fan inlet; The anti-blocking box comprises a holder and a screen, and the screen is wrapped outside the holder; The anti-blocking box further comprises a connecting back plate, the connecting back plate is connected with the fan inlet, and the connecting back plate is provided with an air inlet at a position corresponding to the fan inlet; The front face of the holder is open to form a door frame, one side of the door frame is hingedly connected with a door frame, a locking device is arranged between one side of the door frame and the door frame, and the door frame is wrapped with the screen.

2. The fan inlet anti-blocking device according to claim 1, characterized in that, The holder is a cuboid frame.

3. The fan inlet anti-blocking device according to claim 2, characterized in that, The screen is wrapped on the front face and surrounding side face of the holder, and the back side end of the holder is fixedly connected with the connecting back plate.

4. The fan inlet anti-blocking device according to claim 1, characterized in that, The holder is a cylindrical frame, the screen is wrapped on the front face and surrounding side face of the holder, and the back side end of the holder is fixedly connected with the connecting back plate.

5. The fan inlet anti-blocking device according to claim 1, characterized in that, The screen at the bottom end of the holder has a spacing with the ground, the bottom of the holder is provided with a support frame, and the top end and surrounding of the support frame are open structures.

6. The fan inlet anti-blocking device according to claim 1, characterized in that, The connecting back plate comprises a connecting area and an air inlet area, the connecting area is connected with the fan inlet, the air inlet area is located around the connecting area, and the air inlet area is provided with an air inlet hole.

7. The fan inlet anti-blocking device according to claim 1, characterized in that, The back side of the connecting back plate is connected with an annular connecting plate, the fan inlet is provided with a connecting flange, and the annular connecting plate and the connecting flange are connected through a plurality of connecting bolts which are circumferentially arranged.

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