Noise reduction structure based on industrial refrigerating unit

Abstract

The noise reduction structure based on the industrial refrigerating unit comprises a sound insulation cover body, and the sound insulation cover body sequentially comprises a sound absorption layer, a sound insulation layer and a protective outer layer from inside to outside. An air inlet noise reduction channel and an air outlet noise reduction channel are formed in the positions, corresponding to an air inlet and an air outlet of the industrial refrigerating unit, of the sound insulation cover body and are both filled with sound absorption materials, and the channel walls are in a bent shape. Compared with the prior art, the sound insulation cover has the advantages that the sound insulation cover body is of a multi-layer composite structure, the sound absorption cotton of the sound absorption layer can effectively capture various kinds of noise, the multi-layer composite sound insulation plate of the sound insulation layer can block propagation of noise of different frequencies, the protection outer layer prevents external factors from damaging the structure, and noise is greatly reduced through cooperation of the three parts. The air inlet and air outlet noise reduction channels are filled with sound absorption materials and are in a bent shape, airflow is disturbed, sound energy is consumed, pneumatic noise of the air inlet and the air outlet is effectively reduced, and the overall sound insulation effect is remarkably improved through multi-directional noise reduction.

Description

Technical Field

[0001] This utility model relates to the technical field of refrigeration unit supporting devices, specifically to a noise reduction structure based on industrial refrigeration units. Background Technology

[0002] Industrial refrigeration units, as key equipment in industrial production, are widely used in many fields such as chemical engineering, food processing, and pharmaceuticals. They provide a stable low-temperature environment for the production process through compression refrigeration cycles, ensuring the smooth operation of various production processes. However, industrial refrigeration units generate considerable noise during operation. This noise mainly originates from the coordinated work of components such as the mechanical movement of the compressor, the flow of refrigerant, and the high-speed rotation of the fan.

[0003] Existing noise reduction measures have many shortcomings. Some enterprises only use simple sound barriers, which have limited noise reduction effects and are difficult to meet stringent noise reduction standards. Traditional sound insulation materials are singular and have uneven absorption and blocking capabilities for different frequencies of noise, allowing some low-frequency or high-frequency noise to still penetrate and propagate. Furthermore, the aerodynamic noise generated by the high-speed airflow at the air inlet and outlet of the refrigeration unit lacks effective treatment and often becomes a key area for noise leakage. In addition, the vibration generated during equipment operation is transmitted to the ground, causing secondary noise, and conventional vibration damping methods are ineffective, failing to reduce the generation and propagation of noise at its source. Therefore, there is an urgent need for a highly efficient noise reduction structure to solve the noise pollution problem of industrial refrigeration units. Utility Model Content

[0004] (I) Technical Issues

[0005] The present invention aims to provide a noise reduction structure based on industrial refrigeration units, specifically addressing the problem of severe noise pollution during the operation of industrial refrigeration units.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a noise reduction structure based on an industrial refrigeration unit, including a soundproof cover body. The soundproof cover body is rectangular in shape, and its interior is hollow to form a soundproof space to accommodate the industrial refrigeration unit. The soundproof cover body includes, from the inside to the outside, a sound-absorbing layer, a sound-insulating layer, and a protective outer layer. The sound-absorbing layer is made of sound-absorbing cotton, the sound-insulating layer is a multi-layer composite sound-insulating board, and the protective outer layer is a thin metal plate. The soundproof cover body is provided with an air inlet silencing channel and an air outlet silencing channel at the corresponding air inlet and air outlet positions of the industrial refrigeration unit, respectively. The air inlet silencing channel is connected to the air inlet, and the air outlet silencing channel is connected to the air outlet. Both the air inlet silencing channel and the air outlet silencing channel are filled with sound-absorbing material, and the channel walls are bent.

[0008] Furthermore, a shock-absorbing base is installed at the bottom of the soundproof cover body. The shock-absorbing base includes a bottom plate in contact with the ground, a top plate connected to the bottom of the soundproof cover body, and multiple dampers located between the bottom plate and the top plate. The dampers are evenly distributed, and springs are sleeved on the outside of the dampers. A rubber buffer pad is also provided between the top plate and the bottom plate.

[0009] Furthermore, a detachable inspection door is provided on one side of the soundproof cover body. The edge of the inspection door is inlaid with a sealing strip, and the inspection door is connected to the soundproof cover body by a hinge. The inspection door is also provided with an observation window, which is made of double-layer soundproof glass.

[0010] Furthermore, the sound-absorbing layer has a thickness of 2-5 cm, the sound-insulating layer has a thickness of 3-8 cm, and the protective outer layer has a thickness of 0.5-2 cm.

[0011] Furthermore, the bending angle of the air inlet silencing channel and the air outlet silencing channel is 90°-150°, the channel cross-section is rectangular, and the sound-absorbing material inside the channel is glass fiber sound-absorbing cotton.

[0012] (III) Technical Effects

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. The main body of the soundproof enclosure adopts a multi-layer composite structure. The sound-absorbing cotton in the sound-absorbing layer can effectively capture various types of noise, while the multi-layer composite sound insulation board in the sound insulation layer can block the transmission of noise at different frequencies. The protective outer layer prevents external factors from damaging the structure. The three work together to significantly reduce noise. The air inlet and outlet silencing channels are filled with sound-absorbing material and are bent to disrupt airflow and consume sound energy, effectively reducing aerodynamic noise at the air inlet and outlet. Multi-directional noise reduction significantly improves the overall sound insulation effect.

[0015] 2. The bottom shock-absorbing base, with a combination of damper and spring, buffers the vibration of the unit during operation. The rubber buffer pad further absorbs the vibration, preventing the vibration from being transmitted to the ground and causing secondary noise. This reduces noise generation at the source, extends the service life of the equipment, and maintains the stable operation of the unit. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a noise reduction structure based on an industrial refrigeration unit according to this utility model. Figure 1 .

[0017] Figure 2 This is a three-dimensional structural diagram of a noise reduction structure based on an industrial refrigeration unit according to this utility model. Figure 2 .

[0018] Figure 3 This is a front view schematic diagram of a noise reduction structure based on an industrial refrigeration unit according to this utility model.

[0019] Figure 4 This is a left-side view schematic diagram of a noise reduction structure based on an industrial refrigeration unit according to this utility model.

[0020] Figure 5 This is a schematic cross-sectional view of a noise reduction structure based on an industrial refrigeration unit according to this utility model. Figure 1 .

[0021] Figure 6 This is a schematic cross-sectional view of a noise reduction structure based on an industrial refrigeration unit according to this utility model. Figure 2 .

[0022] As shown in the figure: 1. Soundproof enclosure body; 2. Sound-absorbing material; 4. Air inlet silencing channel; 5. Air outlet silencing channel; 6. Vibration damping base; 7. Inspection door; 101. Sound-absorbing layer; 102. Sound insulation layer; 103. Protective outer layer; 601. Base plate; 602. Top plate; 13. Damper; 14. Rubber buffer pad; 701. Sealing strip; 702. Observation window. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., 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; and 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 according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 To be continued Figure 6A noise reduction structure based on an industrial refrigeration unit includes a soundproof cover body 1, which is rectangular in shape and hollow inside to form a soundproof space to accommodate the industrial refrigeration unit. The soundproof cover body 1 includes, from the inside out, a sound-absorbing layer 101, a sound-insulating layer 102, and a protective outer layer 103. The sound-absorbing layer 101 is made of sound-absorbing cotton, the sound-insulating layer 102 is a multi-layer composite sound-insulating board, and the protective outer layer 103 is a thin metal plate. The soundproof cover body 1 is provided with an air inlet silencing channel 4 and an air outlet silencing channel 5 at the corresponding air inlet 2 and air outlet 3 positions of the industrial refrigeration unit, respectively. The air inlet silencing channel 4 is connected to the air inlet 2, and the air outlet silencing channel 5 is connected to the air outlet 3. Both the air inlet silencing channel 4 and the air outlet silencing channel 5 are filled with sound-absorbing material and the channel walls are bent.

[0027] The bottom of the soundproof enclosure body 1 is equipped with a shock-absorbing base 6. The shock-absorbing base 6 includes a bottom plate 601 that is in contact with the ground, a top plate 602 that connects to the bottom of the soundproof enclosure body 1, and a plurality of dampers 603 located between the bottom plate 601 and the top plate 602. The dampers 603 are evenly distributed, and springs 605 are sleeved on the outside of the dampers 603. A rubber buffer pad 604 is also provided between the top plate 602 and the bottom plate 601.

[0028] The soundproof enclosure body 1 has a detachable inspection door 7 on one side. The edge of the inspection door 7 is inlaid with a sealing strip 701, and the inspection door 7 is connected to the soundproof enclosure body 1 by a hinge 702. The inspection door 7 is also provided with an observation window 703, which is made of double-layer soundproof glass.

[0029] The sound-absorbing layer 101 has a thickness of 2-5 cm, the sound insulation layer 102 has a thickness of 3-8 cm, and the protective outer layer 103 has a thickness of 0.5-2 cm. The bending angle of the air inlet silencing channel 4 and the air outlet silencing channel 5 is 90°-150°, the channel cross-section is rectangular, and the sound-absorbing material 2 inside the channel is glass fiber sound-absorbing cotton.

[0030] The working principle of the noise reduction structure based on an industrial refrigeration unit of this utility model is as follows:

[0031] The industrial refrigeration unit generates noise during operation. The main body 1 of the soundproof enclosure plays its role first. Its internal sound-absorbing layer 101 (made of sound-absorbing cotton) absorbs a large amount of noise by converting sound wave energy into heat energy and other forms of energy through its porous internal structure. The sound insulation layer 102 (multi-layer composite sound insulation board) blocks the outward transmission of noise by relying on the reflection and refraction between different material layers. The protective outer layer 103 (metal sheet) protects the internal structure and prevents external interference.

[0032] The refrigeration unit requires air to enter and exit during operation. There are two air inlets. Air enters through the air intake silencer channel 4, which is filled with sound-absorbing material (such as fiberglass sound-absorbing cotton). The channel wall is bent at 90°-150°. The noise carried by the airflow is reflected multiple times in the bent channel. The sound-absorbing material continuously absorbs sound energy, weakening the noise before the air enters the refrigeration unit. Similarly, the air outlet 3 is opened. Hot air is discharged through the air outlet silencer channel 5. The sound-absorbing material and the bent structure in the channel reduce noise and prevent noise from leaking out directly.

[0033] When the unit vibrates during operation, the vibration damping base 6 activates, with the base plate 601 contacting the ground and the top plate 602 connecting to the bottom of the soundproof enclosure body 1. Multiple evenly distributed dampers 603, along with the fitted springs 605, work together to buffer and absorb vibration energy using damping characteristics and spring elastic deformation. Rubber buffer pads 604 further assist in vibration damping, preventing vibration from being transmitted to the ground and reducing secondary noise. When the maintenance door 7 is closed, the edge sealing strip 701 ensures the soundproof enclosure's airtightness without affecting overall noise reduction. The hinge 702 facilitates opening and maintenance, and the observation window 703 (double-layered soundproof glass) allows for viewing of the unit while isolating internal and external sound transmission.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A noise reduction structure based on an industrial refrigeration unit, comprising a soundproof cover body (1), wherein the soundproof cover body (1) is rectangular parallelepiped, and its interior is hollow to form a soundproof space for accommodating the industrial refrigeration unit, characterized in that, The soundproof cover body (1) consists of a sound-absorbing layer (101), a sound-insulating layer (102), and a protective outer layer (103) from the inside out. The sound-absorbing layer (101) is made of sound-absorbing cotton, the sound-insulating layer (102) is a multi-layer composite sound-insulating board, and the protective outer layer (103) is a thin metal plate. The soundproof cover body (1) is provided with an air inlet silencing channel (4) and an air outlet silencing channel (5) at the corresponding air inlet and air outlet positions of the industrial refrigeration unit, respectively. The air inlet silencing channel (4) is connected to the air inlet, and the air outlet silencing channel (5) is connected to the air outlet. The air inlet silencing channel (4) and the air outlet silencing channel (5) are filled with sound-absorbing material (2) and the channel walls are bent.

2. The noise reduction structure based on an industrial refrigeration unit according to claim 1, characterized in that: The soundproof enclosure body (1) is equipped with a shock-absorbing base (6) at the bottom. The shock-absorbing base (6) includes a bottom plate (601) in contact with the ground, a top plate (602) connected to the bottom of the soundproof enclosure body (1), and multiple dampers (603) located between the bottom plate (601) and the top plate (602). The dampers (603) are evenly distributed, and springs (605) are sleeved on the outside of the dampers (603). A rubber buffer pad (604) is also provided between the top plate (602) and the bottom plate (601).

3. A noise reduction structure based on an industrial refrigeration unit according to claim 1 or 2, characterized in that: The soundproof enclosure body (1) has a detachable inspection door (7) on one side. The edge of the inspection door (7) is inlaid with a sealing strip (701), and the inspection door (7) is connected to the soundproof enclosure body (1) by a hinge. The inspection door (7) is also provided with an observation window (702), which is made of double-layer soundproof glass.

4. The noise reduction structure based on an industrial refrigeration unit according to claim 1, characterized in that: The sound-absorbing layer (101) has a thickness of 2-5 cm, the sound-insulating layer (102) has a thickness of 3-8 cm, and the protective outer layer (103) has a thickness of 0.5-2 cm.

5. The noise reduction structure based on an industrial refrigeration unit according to claim 4, characterized in that: The bending angle of the air inlet silencing channel (4) and the air outlet silencing channel (5) is 90°-150°, the channel cross-section is rectangular, and the sound-absorbing material (2) inside the channel is glass fiber sound-absorbing cotton.

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