A duct connecting device for a fresh air handling unit full heat recovery

Abstract

This utility model relates to the technical field of duct connection equipment for fresh air handling units, and discloses a duct connection device for total heat recovery of fresh air handling units, including a connecting pipe. This duct connection device for total heat recovery of fresh air handling units, through the setting of a disassembly mechanism, allows for easy maintenance of the rock wool layer and polyester fiber sound-absorbing panel on the surface of the noise-reducing pipe during use. The telescopic rod can be pulled, causing the pin connected to one side of the telescopic rod to separate from the limiting blocks on both sides of the connecting pipe. Then, the stretched telescopic rod is released, and the telescopic rod is subjected to a counterforce provided by a supporting spring on one side, causing the telescopic rod to slide inside the fixed rod and return to its initial position. At this time, the connecting pipe loses the limiting blocks on both sides, thus enabling rapid disassembly of the connecting pipe and the extension pipe on one side. This allows for the disassembly of the noise-reducing pipe connected to the extension pipe on one side without the need for bolt installation, improving the installation efficiency for installers.

Description

Technical Field

[0001] This utility model relates to the technical field of duct connection equipment for fresh air handling units, and in particular to a duct connection device for total heat recovery of fresh air handling units. Background Technology

[0002] With increasing public awareness of indoor air quality and energy efficiency, fresh air handling unit heat recovery systems are widely used in various buildings. This system, connected by ducts, facilitates the exchange of heat and humidity between outdoor fresh air and indoor exhaust air, maximizing energy recovery and reducing building energy consumption while introducing fresh air. Throughout the system, the stability and functionality of the ductwork, as the air transport channel, are crucial. Simultaneously, noise-reducing ducts are an indispensable part of the system to minimize the noise impact of the fresh air handling unit's operation on the indoor environment.

[0003] Currently, noise reduction ducts in fresh air handling unit heat recovery systems mostly employ complex and fixed connection methods, such as welding or the use of numerous bolts and nuts for fastening. When the sound-absorbing material inside the noise reduction duct is damaged, or the duct itself cracks, the cumbersome disassembly of the connection structure requires maintenance personnel to spend a significant amount of time and effort to remove the duct for repair or replacement. This not only prolongs equipment downtime and affects the normal operation of indoor ventilation and heat recovery functions but also increases maintenance costs. Therefore, a duct connection device for fresh air handling unit heat recovery is proposed. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The purpose of this invention is to provide a pipe connection device for total heat recovery in fresh air handling units, thereby solving the problem mentioned in the background art that most noise reduction pipes in total heat recovery systems of fresh air handling units adopt relatively complex and fixed connection methods, such as welding or fastening with a large number of bolts and nuts. When the sound-absorbing material inside the noise reduction pipe is damaged or the pipe itself is broken, the connection structure is cumbersome to disassemble, and maintenance personnel need to spend a lot of time and effort to remove the pipe for repair or replacement.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pipe connection device for total heat recovery of a fresh air handling unit, comprising a connecting pipe, with limit blocks fixedly connected to both sides of the connecting pipe, a disassembly mechanism inserted inside the limit blocks, a cavity provided inside the connecting pipe, an extension pipe inserted inside the cavity, a noise reduction pipe connected to the back of the extension pipe, and a noise reduction mechanism installed on the surface of the noise reduction pipe; the disassembly mechanism includes a pin inserted into the limit blocks, a telescopic rod fixedly connected to one side of the pin, a support spring fixedly connected to one side of the telescopic rod, and a fixing rod fixedly connected to one side of the support spring; the noise reduction mechanism includes a rock wool layer installed on the surface of the noise reduction pipe, and a polyester fiber sound-absorbing panel installed on the surface of the rock wool layer.

[0008] As a further embodiment of this utility model, the telescopic rod is slidably connected inside the fixed rod, and a rotating ring is fixedly connected to the bottom of the fixed rod. The rotating ring serves to drive the fixed rod to rotate.

[0009] As a further embodiment of this utility model, the rotating ring is internally connected to a fixed joint, which is fixedly connected to both sides of the extension tube. The fixed joint serves to support the rotating ring.

[0010] As a further embodiment of this utility model, a variable diameter port is fixedly connected to one side of the noise reduction tube, and a flange connector is installed on one side of the variable diameter port. The flange connector serves to connect the variable diameter port.

[0011] As a further embodiment of this utility model, a flange is fixedly connected to the left side of the connecting pipe, and the main body of the fan unit is connected to one side of the flange by bolts and threads. The flange serves to connect the pipe.

[0012] As a further embodiment of this utility model, a sealing ring is installed on the surface of the flange. The sealing ring is made of rubber, and the sealing ring serves to achieve a sealing function.

[0013] As a further embodiment of this utility model, a sealing ring is fitted onto the surface of the extension tube, and the sealing ring is inserted into the internal cavity of the connecting tube. The sealing ring serves to achieve a sealing function.

[0014] (III) Beneficial Effects

[0015] This utility model provides a pipe connection device for total heat recovery of a fresh air handling unit, which has the following beneficial effects:

[0016] 1. The duct connection equipment for the total heat recovery of this fresh air unit, through the setting of the disassembly mechanism, allows for easy maintenance of the rock wool layer and polyester fiber sound-absorbing panel on the surface of the noise-reducing pipe during use. This is achieved by pulling the telescopic rod, causing the pin connected to one side of the telescopic rod to separate from the limiting blocks on both sides of the connecting pipe. Then, releasing the stretched telescopic rod results in a counterforce from the supporting spring on one side, causing the telescopic rod to slide inside the fixed rod and return to its initial position. At this point, the connecting pipe loses the limiting blocks on both sides, allowing for quick disassembly of the connecting pipe and one side of the extension pipe. This completes the disassembly of the noise-reducing pipe connected to the extension pipe side without the need for bolt installation, improving the installation efficiency for installers.

[0017] 2. The duct connection equipment for the total heat recovery of this fresh air unit incorporates a noise reduction mechanism. During gas transport, mechanical vibrations and airflow disturbances inevitably occur during the operation of the fresh air unit, leading to noise. Therefore, a rock wool layer and a polyester fiber sound-absorbing panel are installed on the surface of the noise reduction pipe. The rock wool layer, as the first layer of noise reduction barrier, has excellent absorption capacity for mid-to-high frequency noise due to its complex internal fiber structure. The polyester fiber sound-absorbing panel is closely attached to the outside of the rock wool layer to further optimize the noise reduction performance. The polyester fiber sound-absorbing panel has a rich and uniform microporous structure, which has excellent absorption performance for noise in different frequency bands. It is particularly good at capturing residual noise that the rock wool layer cannot completely absorb. The two work together to greatly improve the noise reduction effect and prevent excessive noise from polluting the surrounding environment. Attached Figure Description

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

[0019] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the disassembly mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the noise reduction mechanism of this utility model.

[0022] In the diagram: 1. Connecting pipe; 2. Limiting block; 3. Disassembly mechanism; 301. Pin; 302. Telescopic rod; 303. Support spring; 304. Fixing rod; 4. Extension pipe; 5. Noise reduction pipe; 6. Noise reduction mechanism; 601. Rock wool layer; 602. Polyester fiber sound-absorbing board; 7. Rotating ring; 8. Fixed joint; 9. Variable diameter port; 10. Flange connector; 11. Flange; 12. Main body of the fan unit; 13. Sealing ring; 14. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a pipe connection device for total heat recovery of a fresh air unit, including a connecting pipe 1, with limit blocks 2 fixedly connected to both sides of the connecting pipe 1, and a disassembly mechanism 3 inserted inside the limit blocks 2. With the setting of the disassembly mechanism 3, installation is not required by bolts, which improves the installation efficiency of the installers. The connecting pipe 1 has a cavity inside, and an extension pipe 4 is inserted inside the cavity. The back of the extension pipe 4 is connected to a noise reduction pipe 5, and a noise reduction mechanism 6 is installed on the surface of the noise reduction pipe 5. With the setting of the noise reduction mechanism 6, the two work together to greatly improve the noise reduction effect and avoid excessive noise from polluting the surrounding environment.

[0025] The disassembly mechanism 3 includes a pin 301 inserted into the limit block 2. A telescopic rod 302 is fixedly connected to one side of the pin 301. A support spring 303 is fixedly connected to one side of the telescopic rod 302. A fixing rod 304 is fixedly connected to one side of the support spring 303.

[0026] The noise reduction mechanism 6 includes a rock wool layer 601 installed on the surface of the noise reduction tube 5, and a polyester fiber sound-absorbing panel 602 is installed on the surface of the rock wool layer 601.

[0027] The telescopic rod 302 is slidably connected to the inside of the fixed rod 304. The bottom of the fixed rod 304 is fixedly connected to a rotating ring 7. The rotating ring 7 is used to drive the fixed rod 304 to rotate.

[0028] The rotating ring 7 is rotatably connected to a fixed joint 8, which is fixedly connected to both sides of the extension tube 4. The fixed joint 8 serves to support the rotating ring 7.

[0029] A variable diameter port 9 is fixedly connected to one side of the noise reduction tube 5, and a flange connector 10 is installed on one side of the variable diameter port 9. The flange connector 10 serves to connect the variable diameter port 9.

[0030] A flange 11 is fixedly connected to the left side of the connecting pipe 1. The main body of the fan unit 12 is connected to one side of the flange 11 by bolts and threads. The flange 11 serves to connect the pipe.

[0031] A sealing ring 13 is installed on the surface of the flange 11. The sealing ring 13 is made of rubber and serves to seal the flange.

[0032] A sealing ring 14 is fitted onto the surface of the extension tube 4. The sealing ring 14 is inserted into the internal cavity of the connecting tube 1. The sealing ring 14 serves to seal the tube.

[0033] In this invention, the working steps of the device are as follows:

[0034] First step: When using the device, if it is necessary to maintain the rock wool layer 601 and polyester fiber sound-absorbing board 602 on the surface of the noise reduction tube 5, the telescopic rod 302 can be pulled to separate the pin 301 connected to one side of the telescopic rod 302 from the limiting blocks 2 set on both sides of the connecting tube 1. Then, the stretched telescopic rod 302 is released. The telescopic rod 302 is subjected to the reverse force provided by the supporting spring 303 on one side, so that the telescopic rod 302 slides inside the fixed rod 304 and returns to the starting position. At this time, the connecting tube 1 loses the limiting on both sides, so that the connecting tube 1 and the extension tube 4 on one side can be quickly disassembled, and the noise reduction tube 5 connected to one side of the extension tube 4 can be disassembled.

[0035] The second step: During gas delivery, mechanical vibration and airflow disturbance inevitably occur during the operation of the fresh air unit, which in turn causes noise. Therefore, a rock wool layer 601 and a polyester fiber sound-absorbing panel 602 are installed on the surface of the noise reduction pipe 5. The rock wool layer 601, as the first layer of noise reduction barrier, has excellent absorption capacity for mid-to-high frequency noise due to its intricate internal fiber structure. The polyester fiber sound-absorbing panel 602 is closely attached to the outside of the rock wool layer 601 to further optimize the noise reduction performance. The polyester fiber sound-absorbing panel 602 has a rich and uniform microporous structure, which has excellent absorption performance for noise in different frequency bands, and is particularly good at capturing residual noise that the rock wool layer 601 cannot completely absorb.

[0036] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.

[0037] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piping connection device for total heat recovery of a fresh air handling unit, comprising a connecting pipe (1), characterized in that: Both sides of the connecting pipe (1) are fixedly connected to limit blocks (2). A disassembly mechanism (3) is inserted into the inside of the limit block (2). A cavity is provided inside the connecting pipe (1). An extension pipe (4) is inserted into the cavity. A noise reduction pipe (5) is connected to the back of the extension pipe (4). A noise reduction mechanism (6) is installed on the surface of the noise reduction pipe (5). The disassembly mechanism (3) includes a pin (301) inserted into the limiting block (2), a telescopic rod (302) is fixedly connected to one side of the pin (301), a support spring (303) is fixedly connected to one side of the telescopic rod (302), and a fixing rod (304) is fixedly connected to one side of the support spring (303). The noise reduction mechanism (6) includes a rock wool layer (601) installed on the surface of the noise reduction tube (5), and a polyester fiber sound-absorbing panel (602) is installed on the surface of the rock wool layer (601).

2. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 1, characterized in that: The telescopic rod (302) is slidably connected to the inside of the fixed rod (304), and a rotating ring (7) is fixedly connected to the bottom of the fixed rod (304).

3. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 2, characterized in that: The rotating ring (7) is rotatably connected to a fixed joint (8), which is fixedly connected to both sides of the extension tube (4).

4. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 1, characterized in that: A variable diameter port (9) is fixedly connected to one side of the noise reduction pipe (5), and a flange connector (10) is installed on one side of the variable diameter port (9).

5. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 1, characterized in that: A flange (11) is fixedly connected to the left side of the connecting pipe (1), and the main body of the fan unit (12) is connected to one side of the flange (11) by bolt thread.

6. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 5, characterized in that: A sealing ring (13) is installed on the surface of the flange (11), and the sealing ring (13) is made of rubber.

7. The piping connection equipment for total heat recovery of a fresh air handling unit according to claim 1, characterized in that: A sealing ring (14) is fitted onto the surface of the extension tube (4), and the sealing ring (14) is inserted into the cavity inside the connecting tube (1).

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