Air return device for dust-free workshop

Abstract

The utility model belongs to the technical field of clean rooms, and discloses a dust-free workshop air return device which comprises a connecting pipe opening, one side of the connecting pipe opening is connected with an air return pipeline in a sealed mode, the end, away from the connecting pipe opening, of the air return pipeline is connected with an air return pump in a sealed mode, and the output end of the air return pump is connected with an S-shaped noise reduction pipeline. An S-shaped noise reduction pipeline is arranged in the air return pump machine, noise reduction cotton is arranged in the S-shaped noise reduction pipeline, the end, away from the air return pump machine, of the S-shaped noise reduction pipeline is connected with an air return filtering device in a sealed mode, and the output end of the air return filtering device is connected with an air outlet pipeline. According to the air conditioner, the structural design is compact and reasonable, the return air is not directly mixed with outside fresh air, the return air is not subjected to temperature and humidity treatment, energy can be greatly saved, certain economic benefits are achieved, wind noise can be reduced, and the situation that the filtering effect is affected due to the fact that the wind speed is too high can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of clean rooms, in particular to an air return device for a dust-free workshop. Background Art

[0002] Cleanroom return air systems are crucial for controlling and treating air flow within cleanrooms. Cleanrooms are primarily used in environments with extremely high air cleanliness requirements, such as electronics manufacturing, pharmaceuticals, and biotechnology. Return air systems draw indoor air back into the air handling system for filtration and purification, thereby maintaining a clean working environment. Often used in conjunction with air conditioning systems, return air systems control temperature and humidity within the workshop, providing a suitable production environment. Effective air return improves the efficiency of air purification equipment (such as HEPA filters), ensuring higher air cleanliness levels. Return air systems reduce the amount of fresh air introduced, thereby reducing energy consumption and improving overall system efficiency. Return air systems help maintain uniform temperature and humidity, creating a more comfortable and safe working environment and enhancing employee productivity. Return air systems can be flexibly designed and adjusted to meet the specific cleanroom requirements for cleanliness, airflow patterns, and other factors. In summary, cleanroom return air systems are not only crucial for maintaining air cleanliness and quality, but also effectively enhance the energy efficiency and comfort of the entire working environment.

[0003] In some cleanrooms, production processes rarely alter the ambient temperature and humidity, and the ambient temperature and humidity are moderate, not extreme. This means that workers rarely alter the ambient temperature and humidity. Conventional return air systems in these cleanrooms waste a significant amount of energy on unnecessary temperature and humidity adjustments. Most industrial temperature and humidity adjustment methods use heating, cooling, and finally steam humidification. This method's energy consumption depends heavily on the volume of air being processed. If return air is directly mixed with fresh air, even the return air, which has the appropriate temperature and humidity, must undergo these three steps, significantly wasting energy. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present invention provides a dust-free workshop return air device to solve the problem of energy waste caused by the return air undergoing temperature and humidity treatment again, etc., as mentioned in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dust-free workshop return air device, comprising a connecting pipe mouth, one side of the connecting pipe mouth is sealedly connected to a return air duct, the end of the return air duct facing away from the connecting pipe mouth is sealedly connected to a return air pump, the output end of the return air pump is connected to an S-shaped silencer pipe, silencer cotton is arranged in the S-shaped silencer pipe, the end of the S-shaped silencer pipe facing away from the return air pump is sealedly connected to a return air filter device, and the output end of the return air filter device is connected to an air outlet duct.

[0008] Preferably, multiple groups of partitions are welded in the S-shaped silencer pipe, and the multiple groups of partitions are arranged at intervals to divide the S-shaped silencer pipe into a tortuous S-shaped channel. Silencing cotton is adhered to the inner wall of the S-shaped silencer pipe and the multiple groups of partitions.

[0009] Preferably, the sound-absorbing cotton is a fluffy sponge structure, and is provided with multiple groups of convex columns and multiple groups of spherical pits.

[0010] Preferably, the connecting pipe opening is installed on the wall of the dust-free workshop, and the opening is connected to the inside of the dust-free workshop, and the air outlet duct is sealed and connected to the air supply channel of the air inlet device.

[0011] Preferably, the return air device is applied to the air duct system of a dust-free workshop, including an air inlet, an air inlet elbow is provided at one end of the air inlet, and the other end is sealed with a variable frequency air pump, the output end of the variable frequency air pump is connected with an air inlet channel, the other end of the air inlet channel is sealed with a first-stage filter device, the output end of the first-stage filter device is connected with a temperature and humidity adjustment device, the output end of the temperature and humidity adjustment device is connected with an air supply channel, the air outlet duct is sealed with the air supply channel, and a shut-off valve is installed between the air outlet duct and the temperature and humidity adjustment device on the air supply channel, the end of the air supply channel away from the temperature and humidity adjustment device is sealed with the second-stage filter device, the output end of the second-stage filter device is sealed with the sterilization device, and the output end of the sterilization device is connected to the inside of the dust-free workshop.

[0012] (3) Beneficial effects

[0013] Compared with the prior art, the present invention provides a dust-free workshop air return device with the following beneficial effects:

[0014] 1. The return air device of the dust-free workshop is equipped with a return air filter device and an S-shaped silencer duct. The return air is not mixed with the fresh air from the outside, and the return air does not undergo temperature and humidity treatment. It can greatly save energy, has certain economic benefits, can reduce wind whistling noise, and can prevent the wind speed from being too fast to affect the filtering effect.

[0015] 2. A return air filter device is provided to filter the return air directly into the fine filter after preliminary filtration. The return air is not mixed with the fresh air from the outside, and the return air does not undergo temperature and humidity treatment, which can greatly save energy and has certain economic benefits.

[0016] 3. Set up S-shaped silencer pipes and silencer cotton to make the return air pass through the S-shaped pipe to reduce speed and silence the air, which can reduce the whistling noise and prevent the wind speed from being too fast to affect the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the S-shaped silencer pipe of the utility model;

[0019] Figure 3 This is a schematic diagram of the utility model's sound-absorbing cotton;

[0020] Figure 4 This is a schematic diagram of the air duct system used in conjunction with the return air device of the utility model.

[0021] In the figure: 1. Connecting pipe; 2. Return air duct; 3. Return air pump; 4. S-shaped silencer duct; 5. Silencer cotton; 6. Return air filter device; 7. Outlet duct; 8. Partition; 9. Boss; 10. Spherical pit; 11. Air inlet; 12. Variable frequency air pump; 13. Air inlet channel; 14. First-stage filter device; 15. Temperature and humidity control device; 16. Shut-off valve; 17. Air supply channel; 18. Second-stage filter device; 19. Sterilization device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A dust-free workshop return air device includes a connecting pipe mouth 1, one side of the connecting pipe mouth 1 is sealedly connected to a return air duct 2, the end of the return air duct 2 facing away from the connecting pipe mouth 1 is sealedly connected to a return air pump 3, the output end of the return air pump 3 is connected to an S-shaped silencer pipe 4, silencer cotton 5 is provided in the S-shaped silencer pipe 4, the end of the S-shaped silencer pipe 4 facing away from the return air pump 3 is sealedly connected to a return air filter device 6, and the output end of the return air filter device 6 is connected to an air outlet pipe 7. Different from ordinary return air devices, this device must be provided with a return air filter device 6 to perform preliminary filtration on the return air. When using this device, the return air is not directly mixed with the fresh air, and all the return air lacks a preliminary filtration. If some larger particles are not filtered, these large particles may damage the subsequent fine filtration device.

[0025] Furthermore, multiple sets of partitions 8 are welded inside the S-shaped muffler duct 4. These partitions 8 are arranged at intervals to divide the S-shaped muffler duct 4 into a tortuous S-shaped channel. Sound-absorbing cotton 5 is adhered to the inner wall of the S-shaped muffler duct 4 and the multiple sets of partitions 8. Return air is decelerated as it passes through the S-shaped channel, and the sound-absorbing cotton 5 absorbs the noise generated by the return air hitting the partitions 8, as well as the whistling noise caused by the rapid change in the return air direction.

[0026] Furthermore, the sound-absorbing cotton 5 is a fluffy sponge structure, and is provided with multiple groups of convex columns 9 and multiple groups of spherical pits 10. This structure can better absorb vibration potential energy, thereby reducing noise.

[0027] Furthermore, the connecting pipe port 1 is mounted on the wall of the cleanroom, and the opening is connected to the interior of the cleanroom. The air outlet duct 7 is sealed and connected to the air supply channel of the air inlet device. This return air device is different from traditional return air devices. The return air output end is not directly mixed with the fresh air. Instead, it is connected after the temperature and humidity treatment process and before the fine filtration process. This requires a specially designed air intake system.

[0028] Furthermore, the return air device is applied to the air duct system of the dust-free workshop, including an air inlet 11, an air inlet elbow is provided at one end of the air inlet 11, and the other end is sealed with a variable frequency air pump 12, the output end of the variable frequency air pump 12 is connected to the air inlet channel 13, the other end of the air inlet channel 13 is sealed with a first-stage filter device 14, the output end of the first-stage filter device 14 is connected to a temperature and humidity adjustment device 15, the output end of the temperature and humidity adjustment device 15 is connected to an air supply channel 17, the air outlet duct 7 is sealed with the air supply channel 17, and a shut-off valve 16 is installed between the air outlet duct 7 and the temperature and humidity adjustment device 15 on the air supply channel 17, the end of the air supply channel 17 facing away from the temperature and humidity adjustment device 15 is sealed with the second-stage filter device 18, the output end of the second-stage filter device 18 is sealed with a sterilization device 19, and the output end of the sterilization device 19 is connected to the inside of the dust-free workshop. In this air duct system, the fresh air uses the kinetic energy provided by the variable frequency air pump 12 to enter the air inlet 11 through the air inlet channel 13. The fresh air reaches the first-stage filter device 14 and undergoes the first rough filtration to filter out larger particles. Then, the temperature and humidity are adjusted by the temperature and humidity adjustment device 15. The regulated fresh air is mixed with the return air that has been roughly filtered by the return air device. The mixed air is finely filtered by the second-stage filter device 18. The finely filtered mixed air is sterilized and disinfected by the sterilization device 19 and then transported to the dust-free workshop.

[0029] Working principle: When using this device, different from the common return air device, this device needs to transport the return air to the temperature and humidity treatment and before fine filtration, so that the return air can save a temperature and humidity adjustment step. The return air is roughly filtered from the dust-free workshop to this return air device. The filtered return air is mixed with the fresh air that has been temperature and humidity treated and roughly filtered, and then passes into the dust-free workshop after fine filtration.

[0030] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust-free workshop return air device, characterized by: The invention comprises a connecting pipe mouth (1), one side of the connecting pipe mouth (1) is sealedly connected to a return air duct (2), one end of the return air duct (2) facing away from the connecting pipe mouth (1) is sealedly connected to a return air pump (3), an output end of the return air pump (3) is connected to an S-shaped silencer pipe (4), silencer cotton (5) is arranged in the S-shaped silencer pipe (4), one end of the S-shaped silencer pipe (4) facing away from the return air pump (3) is sealedly connected to a return air filter device (6), and the output end of the return air filter device (6) is connected to an air outlet pipe (7).

2. The dust-free workshop air return device according to claim 1, characterized in that: Multiple groups of partitions (8) are welded inside the S-shaped silencer pipe (4), and the multiple groups of partitions (8) are arranged at intervals to divide the S-shaped silencer pipe (4) into a tortuous S-shaped channel. Silencing cotton (5) is adhered to the inner wall of the S-shaped silencer pipe (4) and the multiple groups of partitions (8).

3. The dust-free workshop air return device according to claim 2, characterized in that: The silencer cotton (5) is a fluffy sponge structure, and is provided with a plurality of groups of convex columns (9) and a plurality of groups of spherical pits (10).

4. The dust-free workshop air return device according to claim 1, characterized in that: The connecting pipe opening (1) is installed on the wall of the dust-free workshop, and the opening is connected to the interior of the dust-free workshop. The air outlet duct (7) is sealedly connected to the air supply channel of the air inlet device.

5. The dust-free workshop air return device according to claim 1, characterized in that: The return air device is applied to the air duct system of a dust-free workshop, comprising an air inlet (11), an air inlet elbow is provided at one end of the air inlet (11), and the other end is sealedly connected to a variable frequency air pump (12), the output end of the variable frequency air pump (12) is connected to an air inlet channel (13), the other end of the air inlet channel (13) is sealedly connected to a first-stage filter device (14), the output end of the first-stage filter device (14) is connected to a temperature and humidity regulating device (15), and the output end of the temperature and humidity regulating device (15) is connected to The air supply channel (17) is sealed and connected to the air supply channel (17), and a shut-off valve (16) is installed between the air supply channel (17) and the temperature and humidity regulating device (15). The end of the air supply channel (17) facing away from the temperature and humidity regulating device (15) is sealed and connected to the second-stage filter device (18). The output end of the second-stage filter device (18) is sealed and connected to the sterilization device (19). The output end of the sterilization device (19) is connected to the inside of the dust-free workshop.

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