Noise reduction structure of outdoor unit of subway station

Abstract

The utility model relates to a noise reduction structure of an outdoor unit of a subway station. The noise reduction structure comprises a heat-insulating sound-absorbing wallboard and a heat-insulating top plate which are arranged around the outdoor unit to form a rectangle, a silencing cover is arranged at the position, corresponding to the draught fan, of the heat insulation top plate, and the heat insulation top plate is vertically fixed to the top of the heat insulation and sound absorption wallboard; air inlet heat dissipation openings protruding outwards are formed in the bottoms of the set of heat insulation and sound absorption wallboards parallel to one another, and a plurality of air guide pieces are arranged in the air inlet heat dissipation openings. The air inlet heat dissipation opening is formed in the heat dissipation pit, and the bottom face of the heat dissipation pit is lower than the equipment installation face of the outdoor unit so that outdoor cold air can be guided to the outdoor unit conveniently, and meanwhile noise spread outwards is reduced. According to the utility model, the heat dissipation pit, the air inlet heat dissipation port and the silencing cover are arranged to meet the ventilation and heat dissipation effects of equipment, and noise transmission is reduced to the maximum extent; the adopted heat insulation and sound absorption wall plate has a double sound insulation structure of sound insulation cotton and a sealing vacuum plate, so that the sound insulation effect is better; and the noise reduction index of the sound insulation and noise reduction facility of the outdoor unit is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of outdoor unit noise reduction, and particularly relates to a noise reduction structure for outdoor units in subway stations. Background Technique

[0002] Air conditioning systems are generally installed in subway stations. Taking Tianjin Subway Line 3 as an example, two water-cooled units are designed for each station to provide cooling sources for the public area, supporting two cooling towers, two chilled water circulation pumps, two cooling water circulation pumps, and four modular air handling units; at the same time, one air-cooled unit is designed for each station to provide cooling sources for equipment and management rooms, supporting one chilled water circulation pump and two to six air handling units. Among them, the air-cooled unit and the cooling tower are generally installed on the outdoor ground or the roof of the building.

[0003] Outdoor units (including air-cooled units and cooling towers) are an important part of air conditioning operation. Since the installation area is usually close to the downtown area, and even close to sensitive points such as residential buildings, the operating noise has a greater impact on the daily life of residents. Among them, the cooling tower mainly has splash noise and top fan noise; the splash noise refers to the splash noise generated when the falling water flow impacts the water surface, which belongs to medium-low frequency, high-intensity, and steady-state noise. Due to its large sound source, strong sound power level, wide frequency band, small attenuation of medium-low frequency, and long propagation distance; the top fan noise refers to the noise radiated by the fan through the air inlet and outlet and the tower body. The exhaust port noise belongs to low-frequency noise, which is characterized by low frequency, long wavelength, and little attenuation. The noise control of outdoor units has attracted more and more attention. The common practice in the industry is to build sound insulation walls and install mufflers for noise reduction. At present, the methods of sound insulation and noise reduction for outdoor units are generally relatively simple and crude, without comprehensively considering the noise sources, noise distribution, and reasonable layout of the noise reduction structure of outdoor units. Usually, one thing is neglected while attending to another. One is that although the noise reduction requirements are met, the maintenance, repair space, and ventilation and heat dissipation effects of the equipment are sacrificed, or the equipment maintenance space and ventilation and heat dissipation are satisfied, but the noise reduction effect is discounted.

[0004] To ensure that the sound insulation and noise reduction facilities meet the noise reduction design objectives, and at the same time do not affect the equipment maintenance and repair and ventilation and heat dissipation effects, it is necessary to design a sound insulation and noise reduction structure for outdoor units, which is comprehensively considered by the environmental control professionals from aspects such as the noise sources, distribution, and reasonable layout of the noise reduction structure of the equipment. Summary of the Invention

[0005] The utility model provides a noise reduction structure for outdoor units in subway stations to solve the technical problems existing in the known technology. On the basis of meeting the noise reduction requirements, through reasonable design and layout, it takes into account the equipment maintenance, repair space, and equipment ventilation and heat dissipation effects, and at the same time has the characteristics of simple structure and easy implementation.

[0006] The utility model includes the following technical solutions:

[0007] A noise reduction structure for an outdoor unit of a subway station, comprising heat-insulating and sound-absorbing wall panels that surround the outdoor unit to form a rectangle and a heat-insulating top plate; a muffler cover is provided at a position corresponding to the fan on the heat-insulating top plate, and the heat-insulating top plate is vertically fixed on the top of the heat-insulating and sound-absorbing wall panels; air intake and heat dissipation openings protruding outward are provided at the bottom of a group of parallel heat-insulating and sound-absorbing wall panels, and a number of air guide vanes are provided in the air intake and heat dissipation openings; the air intake and heat dissipation openings are arranged in a heat dissipation pit, and the bottom surface of the heat dissipation pit is lower than the equipment installation surface of the outdoor unit, so as to guide the cool air outdoors to the outdoor unit and reduce the noise transmitted outward at the same time.

[0008] Further, the air intake and heat dissipation openings are arranged at the bottom of the heat-insulating and sound-absorbing wall panels that are the long sides of the rectangle, and the length of the air intake and heat dissipation openings is increased to enhance the heat dissipation effect.

[0009] Further, a maintenance door that opens outwards is provided on the heat-insulating and sound-absorbing wall panel without the air intake and heat dissipation openings, so as to facilitate the staff to conduct daily inspections on the outdoor unit.

[0010] Further, a drainage slope is provided on the bottom surface of the heat dissipation pit, and the slope inclines away from the outdoor unit.

[0011] Further, a drainage ditch is provided on the side of the bottom surface of the heat dissipation pit away from the outdoor unit, and the end of the drainage ditch is connected to a drain pipe. The drainage ditch and the drain pipe are provided to prevent a large amount of accumulated water from remaining in the heat dissipation pit and being unable to drain when it rains.

[0012] Further, the equipment installation surface of the outdoor unit is higher than the outdoor ground plane, and the top surface height of the air intake and heat dissipation openings is flush with the equipment installation surface or no more than 20 cm higher than the equipment installation surface.

[0013] Further, the heat-insulating and sound-absorbing wall panel comprises a plastic wall body, a sealed vacuum panel and sound-absorbing cotton; the sealed vacuum panel is adhesively fixed to the inner side of the plastic wall body, and the sound-absorbing cotton is adhesively fixed to the inner side of the sealed vacuum panel.

[0014] Further, the plastic wall body is made of corrosion-resistant and high-temperature-resistant plastic, such as PPS, etc.

[0015] Further, the sound-absorbing cotton is located on the side close to the outdoor unit.

[0016] Further, the outside of the sealed vacuum panel is a sealed housing, and a number of support rods are provided in the sealed housing and it is in a vacuum state.

[0017] The advantages and positive effects of the present utility model are:

[0018] 1. The present utility model meets the ventilation and heat dissipation effects of the equipment by setting a heat dissipation pit, air intake and heat dissipation openings and a muffler cover, and minimizes the noise transmission.

[0019] 2. The heat-insulating and sound-absorbing wall panel adopted by the present utility model has a double sound-insulating structure of sound-insulating cotton and a sealed vacuum panel, and the sound-insulating effect is better.

[0020] 3. The present utility model can effectively improve the noise reduction index of the sound insulation and noise reduction facilities of the outdoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0022] Figure 2 is a schematic top view structure diagram of the present utility model;

[0023] Figure 3 is Figure 1 an enlarged schematic view of the A-A structure in

[0024] In the figure, 1-outdoor unit; 101-fan; 2-silencer; 3-intake and heat dissipation port; 4-air guide vane; 5-heat-insulating and sound-absorbing wall panel; 501-plastic wall; 502-sealed vacuum panel; 503-sound-insulating cotton; 6-heat dissipation pit; 7-drainage ditch; 8-drain pipe; 9-inspection door. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to further disclose the content, features and effects of the invention, the following examples are specifically given and described in detail in conjunction with the drawings. In the description of the following embodiments, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present patent.

[0026] In the description of the following embodiments, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present patent can be understood according to specific circumstances.

[0027] Embodiment: Refer to the attached Figures 1-3, A noise reduction structure for an outdoor unit of a subway station, comprising heat-insulating and sound-absorbing wall panels 5 and a heat-insulating top plate that are arranged around the outdoor unit 1 to form a rectangle; a silencer cover 2 is provided at a position corresponding to the fan 101 on the heat-insulating top plate, and the heat-insulating top plate is vertically fixed on the top of the heat-insulating and sound-absorbing wall panels 5; a group of heat-insulating and sound-absorbing wall panels 5 that are parallel to each other are provided with outwardly protruding air intake and heat dissipation openings 3 at the bottom, and a plurality of air guiding vanes 4 are arranged in the air intake and heat dissipation openings 3; the air intake and heat dissipation openings 3 are arranged in a heat dissipation pit 6, and the bottom surface of the heat dissipation pit 6 is lower than the equipment installation surface of the outdoor unit 1, so as to guide the cool air outdoors to the outdoor unit 1 and reduce the noise transmitted outward at the same time.

[0028] As Figure 1 shown, the bottom surface of the heat dissipation pit 6 is provided with a drainage slope, and the slope inclines away from the outdoor unit 1. A drainage ditch 7 is provided on one side of the bottom surface of the heat dissipation pit 6 away from the outdoor unit 1, and the end of the drainage ditch 7 is connected to a drain pipe 8. The arrangement of the drainage ditch 7 and the drain pipe 8 prevents a large amount of accumulated water from remaining in the heat dissipation pit 6 and being unable to drain when it rains. The equipment installation surface of the outdoor unit 1 is higher than the outdoor ground plane, and the top surface height of the air intake and heat dissipation openings 3 is flush with the equipment installation surface or does not exceed 20 cm higher than the equipment installation surface.

[0029] As Figure 2 shown, the air intake and heat dissipation openings 3 are arranged at the bottom of the heat-insulating and sound-absorbing wall panels 5 that are the long sides of the rectangle, increasing the length of the air intake and heat dissipation openings 3 to enhance the heat dissipation effect. A maintenance door 9 that opens outwards is provided on the heat-insulating and sound-absorbing wall panels 5 without the air intake and heat dissipation openings 3, so as to facilitate the staff to conduct daily inspections on the outdoor unit 1.

[0030] As Figure 3 shown, the heat-insulating and sound-absorbing wall panels 5 include a plastic wall body 501, a sealed vacuum plate 502 and a sound-absorbing cotton 503; the sealed vacuum plate 502 is adhesively fixed to the inner side of the plastic wall body 501, and the sound-absorbing cotton 503 is adhesively fixed to the inner side of the sealed vacuum plate 502. The plastic wall body 501 is made of corrosion-resistant and high-temperature-resistant plastic, such as PPS, etc. The sound-absorbing cotton 503 is located on the side close to the outdoor unit 1. The outside of the sealed vacuum plate 502 is a sealed shell, and a plurality of support rods are arranged in the sealed shell and it is in a vacuum state.

[0031] Although the preferred embodiments of the present invention are described above, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. These all fall within the protection scope of the present invention.

Claims

1. A noise reduction structure for an outdoor unit of a subway station, characterized in that: It comprises a heat-insulating sound-absorbing wall panel and a heat-insulating top panel which are arranged around the outdoor unit to form a rectangular shape; a silencer is arranged on the heat-insulating top panel at a position corresponding to the fan, and the heat-insulating top panel is vertically fixed on the top of the heat-insulating sound-absorbing wall panel; a group of heat-insulating sound-absorbing wall panels which are parallel to each other are provided with air inlet and heat-dissipating vents protruding outward at the bottom, and a plurality of air guides are arranged in the air inlet and heat-dissipating vents; the air inlet and heat-dissipating vents are arranged in a heat-dissipating pit, and the bottom surface of the heat-dissipating pit is lower than the equipment installation surface of the outdoor unit.

2. The noise reduction structure of an outdoor unit of a subway station according to claim 1 is characterized in that: The air inlet and heat dissipation opening is arranged at the bottom of the heat-insulating and sound-absorbing wallboard which is the long side of the rectangle.

3. The noise reduction structure of an outdoor unit of a subway station according to claim 2 is characterized in that: An inspection door which opens horizontally toward the outdoors is provided on the heat-insulating and sound-absorbing wall panel which is not provided with the air inlet and heat-dissipating outlet.

4. The noise reduction structure of an outdoor unit of a subway station according to claim 1 is characterized in that: The bottom surface of the heat dissipation pit is provided with a drainage slope, which is inclined in a direction away from the outdoor unit.

5. The noise reduction structure of an outdoor unit of a subway station according to claim 4 is characterized in that: A drainage ditch is arranged on the bottom surface of the heat dissipation pit at a side away from the outdoor unit, and the end of the drainage ditch is connected to a drainage pipe.

6. The noise reduction structure of an outdoor unit of a subway station according to claim 1, characterized in that: The equipment installation surface of the outdoor unit is higher than the outdoor ground plane, and the top surface height of the air inlet and heat dissipation port is level with the equipment installation surface or is no more than 20 cm higher than the equipment installation surface.

7. The noise reduction structure of an outdoor unit of a subway station according to claim 1, characterized in that: The heat-insulating sound-absorbing wall panel comprises a plastic wall, a sealed vacuum panel and sound-insulating cotton; the sealed vacuum panel is bonded and fixed to the inner side of the plastic wall, and the sound-insulating cotton is bonded and fixed to the inner side of the sealed vacuum panel.

8. The noise reduction structure of an outdoor unit of a subway station according to claim 7, characterized in that: The plastic wall is made of corrosion-resistant and high-temperature-resistant plastic.

9. The noise reduction structure of an outdoor unit of a subway station according to claim 7, characterized in that: The sound insulation cotton is located on the side close to the outdoor unit.

10. The noise reduction structure of an outdoor unit of a subway station according to claim 7, characterized in that: The outside of the sealed vacuum panel is a sealed shell, and a plurality of support rods are arranged inside the sealed shell.

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