A heating and plumbing duct internal cleaning device

Abstract

The utility model relates to pipeline internal cleaning technical field discloses a kind of heating and ventilation pipeline internal cleaning device, including mounting disc, pulley assembly, support limiting structure, motor, rotating ring, connecting frame, connecting rod and brush body, several pulley assemblies are symmetrically installed in the outside of mounting disc, support limiting structure is fixed in the front of mounting disc, motor is horizontally fixed in the front end center of support limiting structure, the middle part of connecting frame is fixed in the drive shaft front end of motor, the end of connecting frame is connected between the front end rim of rotating ring by several connecting rods, the outside of rotating ring is symmetrically installed with several brush bodies, heating and ventilation pipeline internal cleaning device moves in pipeline inside by pulley assembly, rotating ring is rotated by motor drive connecting frame, rotating ring is rotated by several brush bodies on the outside of rotating ring, and the inside wall of pipeline is brushed and washed.The utility model is reliable in structure, strong in stability, can be applied to the pipeline of certain diameter size range, and improves the brushing effect of adherent on the inside wall of pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipe internal cleaning technology, and in particular to a heating, ventilation and air conditioning (HVAC) pipe internal cleaning device. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) ducts are piping systems in buildings that transport air, water, and heat. Over time, due to use and environmental factors, deposits and dirt accumulate on the inner walls of these pipes, easily causing blockages and affecting their normal operation. Therefore, regular cleaning is necessary. Traditional manual cleaning methods are insufficient for cleaning the deep interiors of pipes. While some research exists on internal cleaning devices for HVAC ducts, these devices suffer from complex structures, low stability during rotational cleaning, susceptibility to malfunctions, and limited adaptability to pipes of certain sizes.

[0003] For example, the utility model patent with application number CN202421356637.X, entitled "A Scale Removal Device for Internal HVAC Pipes," describes a device that can move axially along the pipe while simultaneously causing a toothed block to move laterally. The gears on the toothed block drive a gear rod in a circular motion, enabling the moving component to open and close. This not only improves cleaning efficiency but also allows the device to adapt to pipes of different lengths and shapes, giving it better adaptability and faster cleaning capabilities. However, its structure is complex, its overall stability is low, and the device is prone to tilting during the brush rotation process.

[0004] For example, patent application CN202323554293.1, entitled "A Utility Model Patent for a Scale Removal Device for Heating, Ventilation, and Air Conditioning Pipes," utilizes a rotating disc to drive a first and second extrusion plate to press and fix the surface of the heating, ventilation, and air conditioning pipes, achieving an automatic cleaning effect. It can also adjust the height of the cleaning device for heating, ventilation, and air conditioning pipes of different widths. However, it is fixed via a connecting body, with the motor located outside the pipe and driven by a rotating shaft, limiting the applicable pipe sizes. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide an internal cleaning device for HVAC pipes, which has a reliable structure, strong stability, and can be applied to pipes with a certain diameter range, thereby improving the scrubbing effect on the inner wall of the pipe.

[0006] This utility model is achieved using the following technical solution: an internal cleaning device for HVAC ducts, comprising: a mounting plate, a pulley assembly, a support and limiting structure, a motor, a rotating ring, a connecting frame, connecting rods, and brushes. Several pulley assemblies are symmetrically installed on the outer side of the mounting plate. The support and limiting structure is fixed in front of the mounting plate. The motor is horizontally fixed at the center of the front end of the support and limiting structure. The middle part of the connecting frame is fixed to the front end of the motor's drive shaft. The end of the connecting frame is connected to the front edge of the rotating ring via several connecting rods. Several brushes are symmetrically installed on the outer side of the rotating ring. The internal cleaning device for HVAC ducts moves inside the duct via the pulley assembly, and the motor drives the connecting frame to rotate, causing the rotating ring to rotate. The multiple brushes on the outer side of the rotating ring then scrub the inner wall of the duct.

[0007] Furthermore, several brush body connecting posts are symmetrically installed on the outer side of the rotating ring via threaded connection. The outer end of the brush body connecting post is connected to the bottom end of the brush body via a brush body telescopic spring, so that the brush body can be extended and retracted in the radial direction of the rotating ring.

[0008] Furthermore, the pulley assembly is adjustable in the radial direction along the mounting plate.

[0009] Furthermore, the pulley assembly includes a pulley frame, a pulley, and a pulley extension spring. The pulley is rotatably mounted on the pulley frame. Multiple pulley mounting slots for accommodating the pulley assembly are symmetrically arranged along the radial direction of the mounting plate on the outer side of the mounting plate. The pulley frame is installed in the pulley mounting slot with clearance fit. The bottom end of the pulley frame is connected to the bottom end of the pulley mounting slot by the pulley extension spring.

[0010] Furthermore, the support and limiting structure includes a first support plate and a second support plate, with the two first support plates connected by the second support plate, and the motor horizontally fixed at the center of the front end of the second support plate.

[0011] Furthermore, both of the aforementioned first support plates are provided with sliding grooves at their front ends, and the inner edge of the rotating ring is provided with a circular slide rail, allowing the rotating ring to slide in the sliding groove via the circular slide rail along its inner edge.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The present invention relates to an internal cleaning device for HVAC ducts, which moves inside the duct via a pulley assembly. The pulley assembly can automatically extend and retract to a certain extent within the radial pulley mounting groove along the mounting plate, thus making it suitable for ducts with varying diameters. This allows the pulleys to better contact the inner wall of the duct, maintaining stability during operation and work. The device has a reliable structure.

[0014] 2. The present invention relates to an internal cleaning device for HVAC ducts. When the rotating ring rotates, it slides in the groove through the circular slide rail along its inner edge, ensuring stable rotation. The brush body can automatically extend and retract to a certain extent in the radial direction of the rotating ring, so that the brush body maintains sufficient contact friction with the inner wall of the duct and avoids the brush body being stuck in the duct, thereby improving the cleaning effect on the adhering substances on the inner wall of the duct. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the HVAC duct internal cleaning device of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure of the mounting plate, pulley assembly, support and limiting structure and motor in this utility model;

[0017] Figure 3 This is a schematic diagram of the pulley assembly in this utility model.

[0018] In the diagram: Mounting plate-1; Pulley assembly-2; Support and limiting structure-3; Motor-4; Rotary ring-5; Pulley mounting groove-11; Pulley frame-21; Pulley-22; Pulley telescopic spring-23; First support plate-31; Second support plate-32; Slide groove-33; Connecting frame-61; Connecting rod-62; Brush body connecting column-63; Brush body telescopic spring-64; Brush body-65. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] The purpose of this invention is to address the shortcomings of existing technologies by providing a device for cleaning the interior of HVAC ducts.

[0021] Example 1

[0022] This embodiment provides a cleaning device for the interior of HVAC ducts, referring to... Figure 1As shown, the device includes: a mounting plate 1, pulley assembly 2, support and limiting structure 3, motor 4, rotating ring 5, connecting frame 61, connecting rod 62, and brush body 65. Four pulley assemblies 2 are symmetrically installed on the outer side of the mounting plate 1. The support and limiting structure 3 is fixed in front of the mounting plate 1. The motor 4 is horizontally fixed at the center of the front end of the support and limiting structure 3. In this embodiment, the motor 4 is a DC geared motor with an operating voltage of 24-36V. The middle part of the connecting frame 61 is fixed to the front end of the drive shaft of the motor 4. In this embodiment, the connecting frame 61 is a cross-shaped connecting frame. The end of the connecting frame 61 is connected to the front edge of the rotating ring 5 by four connecting rods 62. Four brush bodies 65 are symmetrically installed on the outer side of the rotating ring 5. The HVAC duct cleaning device moves inside the duct via the pulley assembly 2. The motor 4 drives the cross-shaped connecting frame 61 to rotate, causing the rotating ring 5 to rotate. The multiple brush bodies 65 on the outer side of the rotating ring 5 then scrub the inner wall of the duct.

[0023] Reference Figure 1 As shown, four brush body connecting posts 63 are symmetrically installed on the outer side of the rotating ring 5 through threaded connection. The outer end of the brush body connecting post 63 is connected to the bottom end of the brush body 65 through the brush body telescopic spring 64, so that the brush body 65 can be telescopically adjusted in the radial direction of the rotating ring 5.

[0024] Reference Figures 1-3 As shown, the pulley assembly 2 is adjustable in the radial direction along the mounting plate 1. Specifically, the pulley assembly 2 includes a pulley frame 21, a pulley 22, and a pulley extension spring 23. The pulley 22 is rotatably mounted on the pulley frame 21. Multiple pulley mounting slots 11 for accommodating the pulley assembly 2 are symmetrically arranged on the outer side of the mounting plate 1 in the radial direction. The pulley frame 21 is installed in the pulley mounting slot 11 with a clearance fit. The bottom end of the pulley frame 21 is connected to the bottom end of the pulley mounting slot 11 by the pulley extension spring 23.

[0025] Reference Figures 1-2 As shown, the support and limiting structure 3 includes a first support plate 31 and a second support plate 32. The two first support plates 31 are connected by the second support plate 32. The motor 4 is horizontally fixed at the center of the front end of the second support plate 32. A sliding groove 33 is provided at the front end of each of the two first support plates 31. A circular slide rail is provided along the inner edge of the rotating ring 5. The rotating ring 5 can slide in the sliding groove 33 through the circular slide rail along its inner edge, allowing the rotating ring 5 to rotate stably and ensuring the stable operation of the brush body 65.

[0026] This utility model discloses an internal cleaning device for HVAC ducts. In use, an external traction device is connected to the rear end of a mounting plate 1 via a traction rope. The traction rope is an integrated pull rope and wire, which increases the pulling force and simultaneously supplies power to the motor 4. The mounting plate 1 and its connecting structure move within the HVAC duct to be cleaned, removing deposits and dirt adhering to the inner wall of the duct. Specifically, the internal cleaning device moves within the duct via a pulley assembly 2. The pulley assembly 2 can automatically extend and retract to a certain extent within the radial pulley mounting groove 11 along the mounting plate 1, thus adapting to ducts with varying diameters. This allows the pulley 22 to better contact the inner wall of the duct, maintaining stable operation. During operation, motor 4 drives the cross-shaped connecting frame 61 to rotate, which in turn drives the rotating ring 5 to rotate. The rotating ring 5 slides in the groove 33 via a circular slide rail along its inner edge, ensuring stable rotation. Multiple brushes 65 on the outer side of the rotating ring 5 scrub the inner wall of the pipe. The brushes 65 can automatically extend and retract to a certain extent in the radial direction of the rotating ring 5, maintaining sufficient contact friction between the brushes 65 and the inner wall of the pipe and preventing the brushes 65 from getting stuck in the pipe, thus improving the scrubbing effect on the adhering substances on the inner wall of the pipe. The entire device has only one motor as an electrical component; the rest are mechanical structures, ensuring a reliable structure.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning device for the interior of HVAC ducts, characterized in that, include: The installation plate (1), pulley assembly (2), support and limiting structure (3), motor (4), rotating ring (5), connecting frame (61), connecting rod (62) and brush body (65) are arranged in a series. Several pulley assemblies (2) are symmetrically installed on the outside of the installation plate (1). The support and limiting structure (3) is fixed in front of the installation plate (1). The motor (4) is horizontally fixed in the center of the front end of the support and limiting structure (3). The middle part of the connecting frame (61) is fixed to the front end of the drive shaft of the motor (4). The end of the connecting frame (61) is connected to the front edge of the rotating ring (5) by several connecting rods (62). Several brush bodies (65) are symmetrically installed on the outside of the rotating ring (5). The HVAC pipe cleaning device moves inside the pipe through the pulley assembly (2). The motor (4) drives the connecting frame (61) to rotate, which drives the rotating ring (5) to rotate. The multiple brush bodies (65) on the outside of the rotating ring (5) are used to clean the inner wall of the pipe.

2. The internal cleaning device for HVAC ducts according to claim 1, characterized in that: A number of brush body connecting posts (63) are symmetrically installed on the outer side of the rotating ring (5) by threaded connection. The outer end of the brush body connecting post (63) is connected to the bottom end of the brush body (65) by brush body telescopic spring (64), so that the brush body (65) can be telescopically adjusted in the radial direction of the rotating ring (5).

3. The internal cleaning device for HVAC ducts according to claim 2, characterized in that: The pulley assembly (2) is capable of telescopic adjustment along the radial direction of the mounting plate (1).

4. The internal cleaning device for HVAC ducts according to claim 3, characterized in that: The pulley assembly (2) includes a pulley frame (21), a pulley (22), and a pulley extension spring (23). The pulley (22) is rotatably mounted on the pulley frame (21). Multiple pulley mounting slots (11) for accommodating the pulley assembly (2) are symmetrically arranged on the outer side of the mounting plate (1) along the radial direction of the mounting plate (1). The pulley frame (21) is installed in the pulley mounting slot (11) with clearance fit. The bottom end of the pulley frame (21) is connected to the bottom end of the pulley mounting slot (11) by the pulley extension spring (23).

5. The internal cleaning device for HVAC ducts according to claim 1, characterized in that: The support limiting structure (3) includes a first support plate (31) and a second support plate (32). The two first support plates (31) are connected by the second support plate (32), and the motor (4) is horizontally fixed at the center of the front end of the second support plate (32).

6. The internal cleaning device for HVAC ducts according to claim 5, characterized in that: Both of the first support plates (31) are provided with sliding grooves (33) at their front ends. The inner edge of the rotating ring (5) is provided with a circular slide rail. The rotating ring (5) can slide in the sliding groove (33) through the circular slide rail on its inner edge.

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