Industrial duct exhaust fan and mounting assembly therefor

Abstract

The application discloses an industrial pipeline exhaust fan and a mounting assembly thereof, which comprises an exhaust fan panel, the inside of which is provided with a hollow, and a circular hole groove is formed on one side; an extendable and deformable aluminum foil pipe is connected to the outlet of the exhaust fan as a pipeline; one end of the aluminum foil pipe is connected to the air outlet of the exhaust fan, and the other end is connected to an external air outlet; a connecting structure is arranged at the aluminum foil pipe and the exhaust fan to connect and fix the two; the connecting structure comprises a ring-shaped connecting seat, and the size of the connecting seat is matched with the size of the circular hole groove of the exhaust fan panel. The connecting structure is arranged at the aluminum foil pipe and the exhaust fan, so that the connection can be quickly, conveniently and long-effectively realized, and the limiting structure arranged at the connecting structure is matched, so that the quick limiting and fixing can be realized by roughly aligning the positions of the two limiting pressing plates with the groove. The spring has a buffering effect, and can offset the vibration caused by the fan to a certain extent, prevent the limiting structure from loosening and even coming off, and is better in stability.

Description

Technical Field

[0001] This invention relates to the field of exhaust fan technology, specifically to an industrial duct exhaust fan and its installation components. Background Technology

[0002] Ventilation ducts are metal or composite pipes used in ventilation and air conditioning projects for industrial and civil buildings. They are industrial ducts and exhaust fans and their installation components used in municipal infrastructure to facilitate air circulation and reduce the concentration of harmful gases. Exhaust fans are a type of air conditioning appliance that uses an electric motor to drive the fan blades to rotate and drive airflow, thereby exchanging indoor and outdoor air. In use, ventilation ducts and exhaust fans are usually connected to prevent the backflow of air exhausted to the outside.

[0003] Currently, the most commonly used simple exhaust fans are mostly single-unit installations with a simplistic approach. They are directly fixed to the wall, requiring complete disassembly for repair or cleaning when malfunctioning. This process is cumbersome. Furthermore, connecting the ventilation duct and the exhaust fan typically involves applying glue to both ends, resulting in a weak connection and inconvenient disassembly.

[0004] For example, patent number CN202253884U, entitled "A Downdraft Fan Outlet Pipe Connection Structure," relates to an air outlet device for a range hood. A plastic exhaust pipe is fitted onto the outside of the fan outlet pipe and secured with a clamping device. Another example is patent number CN216667910U, entitled "A Ventilation Duct Exhaust Fan Installation Assembly," which features a detachable clamp connected to the ventilation duct body, with bolts threaded onto the clamp. A support ring is detachably connected inside the exhaust fan body… facilitating the installation and disassembly of the ventilation duct and exhaust fan. Existing methods, as disclosed in the above patents, mostly use clamps or bolts for connection. However, bolt installation results in low efficiency for the installation and disassembly of centrifugal axial flow fans. Furthermore, centrifugal axial flow fans vibrate during operation, and bolts can easily loosen, causing abnormal noise from the centrifugal axial flow fan. Clamps, on the other hand, add an extra external structure, which is inconvenient to use and prone to detachment over time.

[0005] This case arose in order to resolve the aforementioned issues. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides an industrial duct exhaust fan and its installation components, solving the problems mentioned in the background section.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: an industrial duct exhaust fan and its installation assembly, comprising an exhaust fan panel with a hollow interior and a circular slot on one side. A retractable aluminum foil tube is typically connected to the exhaust fan outlet as a conduit. One end of the aluminum foil tube is connected to the exhaust fan outlet, and the other end is connected to an external outlet. A connecting structure is provided between the aluminum foil tube and the exhaust fan to secure them together. The connecting structure includes an annular connecting seat whose dimensions are adapted to the circular slot of the exhaust fan panel. Multiple limiting structures are circumferentially arranged on the connecting seat, wherein the limiting structures are used to stably limit the connecting seat to the exhaust fan panel. A limiting slot is correspondingly provided on the exhaust fan panel, and the limiting structures extend entirely through the limiting slot and are locked to the outside of the exhaust fan panel.

[0010] Preferably, the rear circumferential side of the connecting seat has a slot, and each slot is hinged with a rotating block. The limiting structure is fixed to the rotating block. When in use, the rotating block needs to be rotated 180° to move the limiting structure to the front side of the connecting seat.

[0011] Preferably, the length of the rotating block needs to be greater than the thickness of the connecting seat.

[0012] Preferably, the connection structure includes a ring-shaped connecting seat and an extension ring. The extension ring is connected to the outer end of the connecting seat, and its radial dimension is larger than that of the extension ring. The connecting seat and the extension ring are each divided into two equal parts and are hinged at the middle joint. In use, the extension ring abuts against the inner wall of the exhaust fan.

[0013] Preferably, the thickness of the connecting seat is greater than the thickness of the circular slot wall.

[0014] Preferably, the limiting structure includes a support plate, with springs obliquely connected to both sides of the support plate, and two limiting pressure plates with hinged ends located on the outer side of the support plate. The inner sides of the two limiting pressure plates are respectively connected to the outer ends of the corresponding springs, so that they can be compressed inward and contracted.

[0015] Preferably, the two limiting pressure plates are inclined to connect perpendicularly with the spring, the bottom of the limiting pressure plates is expanded, and the distance between the bottoms of the two limiting pressure plates is greater than the width of the limiting groove.

[0016] Preferably, the distance between the limiting pressure plate and the connecting seat is adapted to the groove wall of the circular hole of the exhaust fan.

[0017] (III) Beneficial Effects

[0018] By adopting the above technical solution, the present invention has the following advantages compared with the prior art: The present invention designs a connection structure at the aluminum foil tube and the exhaust fan, enabling a quick, convenient, and long-term stable connection. Simultaneously, it adapts to the limiting structure set at the connection structure. During use, it is only necessary to roughly align the positions of the two limiting pressure plates with the slot. When passing through the limiting slot of the exhaust fan panel, the spring can quickly pass through due to the pressure, and after passing through, the spring resets, pushing the two limiting pressure plates outward, achieving rapid limiting and fixing. Furthermore, the spring itself has a buffering effect, which can, to a certain extent, offset the vibration brought by the fan, preventing the limiting structure from loosening or even falling out, resulting in better stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the connection structure in Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the rear side of the connection structure in Embodiment 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention;

[0023] Figure 5 This is a schematic diagram showing the usage state of the connection structure in Embodiment 2 of the present invention;

[0024] Figure 6 For the use of this invention Figure 5 Enlarged schematic diagram of a local structure at point A;

[0025] Figure 7 This is a schematic diagram illustrating the use of the present invention.

[0026] In the diagram: 1. Exhaust fan panel; 2. Circular slot; 3. Connecting seat; 4. Limiting structure; 41. Support plate; 42. Spring; 43. Limiting pressure plate; 5. Limiting groove; 6. Groove; 7. Rotating block; 8. Extension ring; 9. Aluminum foil tube. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Example 1

[0029] like Figure 1-3 As shown in Figure 7: An industrial duct exhaust fan and its installation components include an exhaust fan panel 1, which is hollow inside and has a circular slot 2 on one side. Generally, a retractable aluminum foil tube 9 is connected to the outlet of the exhaust fan as a duct. One end of the aluminum foil tube 9 is connected to the exhaust fan outlet, and the other end is connected to an external outlet.

[0030] Since the aluminum foil tube 9 is difficult to connect directly to the exhaust fan, this solution designs a connection structure between the aluminum foil tube 9 and the exhaust fan. The connection structure is directly connected to the opening of the exhaust fan, and the aluminum foil tube 9 is connected to the connection structure by a clamp, which enables a quick, convenient and long-term stable connection.

[0031] Specifically, the connection structure includes a ring-shaped connecting seat 3, with a slot 6 circumferentially opened on the rear side of the connecting seat 3. A rotating block 7 is hinged to each slot 6, and a limiting structure 4 is provided on the rotating block 7. The limiting structure 4 is used to stably limit the connecting seat 3 on the exhaust fan panel 1. A corresponding limiting groove 5 is opened on the exhaust fan panel 1, and the limiting structure 4 extends entirely through the limiting groove 5 and is locked to the outside of the exhaust fan panel 1.

[0032] It should be noted that during use, the rotating block 7 needs to be rotated 180° to move the limiting structure 4 to the front of the connecting seat 3. Secondly, the length of the rotating block 7 needs to be greater than the thickness of the connecting seat 3 so that after rotating the rotating block 7, the limiting structure 4 can be placed on the outside of the connecting seat 3 to fit into the limiting groove 5 for fixation.

[0033] The limiting structure 4 includes a support plate 41, with springs 42 inclinedly connected to both sides of the support plate 41. Two limiting pressure plates 43 with hinged ends are provided on the outer side of the support plate 41. The inner sides of the two limiting pressure plates 43 are respectively connected to the outer ends of the corresponding springs 42, so that they can be pressed inward and contracted.

[0034] It should be noted that, under normal conditions, the two limiting pressure plates 43 are inclined to connect perpendicularly with the spring 42. Secondly, the bottom of the limiting pressure plates 43 is expanded, and the distance between the bottoms of the two limiting pressure plates 43 is greater than the width of the limiting groove 5, so that they can be limited to the outer wall of the exhaust fan.

[0035] Furthermore, the distance between the limiting pressure plate 43 and the connecting seat 3 should be adapted as closely as possible to the groove wall of the circular slot 2 of the exhaust fan to ensure adequate fixation. Alternatively, magnets with opposite magnetic properties can be placed at the contact points between the rotating block 7 and the groove wall of the circular slot 2 of the exhaust fan to achieve adequate fixation through magnetic attraction, indirectly offsetting the gap between the limiting pressure plate 43 and the outer groove wall of the circular slot 2.

[0036] In use, simply align the two limiting pressure plates 43 roughly with the slot 6. Their small front end size allows for better alignment and insertion into the limiting slot 5. When passing through the limiting slot 5, the spring 42 is quickly pushed out due to the pressure. After pushing out, the spring 42 returns to its original position, pushing the two limiting pressure plates 43 outwards for quick and easy positioning and fixing. The spring 42 itself has a buffering effect, which can, to some extent, offset the vibration from the fan and prevent the limiting structure 4 from loosening or even falling out.

[0037] Example 2

[0038] This embodiment is basically the same as the solution in Embodiment 1, with the main improvement being in the connection structure. Considering that when using the hinged rotating block 7, the force at the hinged part is not stable enough and it is prone to swaying with the operation of the exhaust fan, resulting in significant noise.

[0039] The connection structure includes a ring-shaped connecting seat 3 and an extension ring 8. The size of the connecting seat 3 is adapted to the size of the circular slot 2 of the exhaust fan panel 1. The extension ring 8 is connected to the outer end of the connecting seat 3, and its radial dimension is larger than that of the extension ring 8.

[0040] See appendix Figure 4-6 The connecting seat 3 and the extension ring 8 are of equal size and are divided into two parts, and are hinged at the middle joint, so that they can be folded in half and quickly inserted into the cavity of the exhaust fan panel 1, and can be smoothly inserted into the circular slot 2. When the two are opened to the maximum, they are abutted. At this time, the extension ring 8 can be placed against the inner wall of the exhaust fan. The entire opening of the connecting seat 3 is used to connect the aluminum foil tube 9.

[0041] Since the aluminum foil tube 9 has a certain deformation capability, the connecting seat 3 and the extension ring 8 can be configured to be folded in half.

[0042] The connecting structure also includes a limiting structure 4, used to stably limit the connecting seat 3 onto the exhaust fan panel 1. Multiple limiting structures 4 are provided and circumferentially fixed on one side of the extension ring 8. A corresponding limiting groove 5 is provided on the exhaust fan panel 1, and the entire limiting structure 4 extends through the limiting groove 5 and is locked to the outside of the exhaust fan panel 1. The limiting structure 4 in this embodiment is structurally the same as the limiting structure 4 in Embodiment 1.

[0043] The above-described embodiments are provided for illustrative purposes. Based on the above description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this utility model is not limited to the contents of the specification; its protection scope must be determined according to the claims.

Claims

1. An industrial duct exhaust fan and its mounting assembly, comprising an exhaust fan panel, the inside of which is provided with a hollow, and a circular hole slot is formed on one side, the outlet of the exhaust fan is connected with an extensible and deformable aluminum foil pipe as a duct, one end of the aluminum foil pipe is connected with the exhaust fan air outlet, and the other end is connected with an external air outlet, characterized in that: The aluminum foil pipe is provided with a connecting structure at the exhaust fan, so as to connect and fix the aluminum foil pipe and the exhaust fan, the connecting structure comprises a connecting seat in the form of a ring, the size of the connecting seat is matched with the size of the circular hole groove of the exhaust fan panel, a plurality of limiting structures are arranged on the connecting seat in the circumferential direction, wherein the limiting structures are used for stably limiting the connecting seat on the exhaust fan panel, the exhaust fan panel is provided with a limiting groove at the corresponding position, the limiting structure passes through the limiting groove and is locked on the outer side of the exhaust fan panel; The rear side of the connecting seat is provided with a slot in the circumferential direction, a rotating block is hingedly connected on each slot, the limiting structure is fixed on the rotating block, the rotating block needs to be rotated by 180° in use, and the limiting structure is rotated to the front side of the connecting seat; the connecting structure comprises a connecting seat in the form of a ring and an extension ring, the extension ring is connected to the outer end of the connecting seat, the radial dimension of the extension ring is greater than the radial dimension of the extension ring, the connecting seat and the extension ring are respectively divided into two parts with equal dimensions, and are hingedly connected at the middle connection part, the extension ring is abutted on the inner wall of the exhaust fan in use; the limiting structure comprises a support plate, springs are obliquely connected on both sides of the support plate, two limiting pressure plates with hingedly connected end portions are arranged on the outer side of the support plate, the inner sides of the two limiting pressure plates are respectively connected with the outer ends of the corresponding springs, so that the limiting pressure plates can be inwardly pressed and contracted.

2. An industrial duct exhaust fan and mounting assembly according to claim 1 wherein: The length of the rotating block needs to be greater than the thickness of the connecting seat.

3. An industrial duct exhaust fan and mounting assembly according to any one of claims 1-2, characterized in that: The thickness of the connecting seat is greater than the thickness of the wall of the circular hole groove.

4. An industrial duct exhaust fan and mounting assembly according to claim 1, wherein: The two limiting pressure plates are obliquely arranged to vertically connect with the springs, the bottom of the limiting pressure plate is expanded, and the distance between the bottoms of the two limiting pressure plates is greater than the width of the limiting groove.

5. An industrial duct exhaust fan and mounting assembly according to claim 1 wherein: The distance between the limiting pressure plate and the connecting seat is matched with the wall of the circular hole groove of the exhaust fan.

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