CN216691622U - Ceiling air cabinet capable of reducing low-frequency noise - Google Patents
Ceiling air cabinet capable of reducing low-frequency noise Download PDFInfo
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- CN216691622U CN216691622U CN202122535732.9U CN202122535732U CN216691622U CN 216691622 U CN216691622 U CN 216691622U CN 202122535732 U CN202122535732 U CN 202122535732U CN 216691622 U CN216691622 U CN 216691622U
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Abstract
The utility model provides a suspended ceiling wind cabinet capable of reducing low-frequency noise, which comprises a basically closed cabinet body and is characterized in that a first glass wool sound absorption layer is additionally arranged on the inner surface of an inner cavity and is wrapped by porous cloth; the mounting rack is mounted on the bottom frame of the ceiling machine through a spring shock absorber; the ceiling machine chassis is fixedly connected with the mounting table through a fixing screw rod, and a rubber shock pad is additionally arranged at the joint of the ceiling machine chassis and the fixing screw rod. The unit is inside through increasing glass cotton, thickening polyurethane foaming board, and the unit outside increases the glass cotton + outer apron of different thickness. The optimization of the internal structure realizes the effective absorption of low-frequency sound, and the external part ensures that sound waves reduce outward transmission while absorbing sound. The effect of reducing the noise of the unit is achieved.
Description
Technical Field
The utility model relates to the field of wind cabinet equipment, in particular to a suspended ceiling wind cabinet capable of reducing low-frequency noise.
Background
A common traditional ceiling air cabinet adopts a polyurethane foam board, the windward speed of a surface cooler is approximately 2.8-3.0 m/S, and an air system is generally realized by adopting a traditional belt transmission mode for driving a fixed-frequency motor. The whole structure of the machine set is small in size, the structural design is compact, and the vibration reduction is realized by adopting the rubber damping pad. Fig. 1 is a schematic structural view of a conventional ceiling type wind cabinet, which mainly comprises: the device comprises a surface cooler 1, a wall plate 2, a fixed-frequency motor 3, a centrifugal fan 4, a rubber shock pad 5 and a ceiling machine underframe 6. Furred ceiling machine chassis 6 is the integral erection base, only the wallboard at top all adopts the polyurethane foaming board to make, form the peripheral frame structure of furred ceiling wind cabinet with furred ceiling machine chassis 6, surface cooler 1, decide motor 3 frequently, centrifugal fan 4 and rubber shock pad 5 all set up inside it, wherein surface cooler 1 sets up in the left side, be equipped with the mounting bracket that a bottom was equipped with rubber shock pad 5 in the right side, decide motor 3 frequently and centrifugal fan 4 fixes on the mounting bracket, be equipped with the vent on the right side wall. Because the air suction distance of the air system is insufficient, the shock absorber of the air system is insufficient, only the rubber shock absorption pad 5 is provided, and under the condition that the noise in the unit is not eliminated, the unit is easy to generate 'humming' low-frequency sound and airflow sound when the air system runs, and discomfort of a human body is caused. The cause of noise generation: 1. running noise generated by running of the fan and the motor and low-frequency sound generated by running of the motor; 2. the section of the unit causes the windward speed of the surface cooler to be overhigh, and wind generates swooshing airflow sound after passing through a copper pipe and a fin of the surface cooler; 3. the collision between the air flow in the box body inside the ceiling machine and the panel is caused to generate vibration noise in the air suction process of the fan; 4. the vibration of the fan and the motor generates friction sound. 5. The ceiling machine penetrates the machine set to vibrate through the suspension rod to the floor structure, so that floor vibration is generated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to effectively reduce the noise of the air cabinet during working.
In order to solve the problems, the utility model provides a suspended ceiling air cabinet capable of reducing low-frequency noise, which comprises a basically closed cabinet body, wherein a suspended ceiling chassis, a centrifugal fan, a surface cooler and a variable frequency motor are arranged in the cabinet body, the surface cooler is arranged on one side of an inner cavity of the cabinet body, a mounting frame is arranged on the other side of the inner cavity, and the centrifugal fan and the variable frequency motor are fixed on the mounting frame; the wall plate of the cabinet body is a polyurethane foam plate with the thickness of 40-70 mm; the mounting rack is mounted on the bottom frame of the ceiling machine through a spring shock absorber; the ceiling machine chassis is fixedly connected with the mounting table through a fixing screw rod, and a rubber shock pad is additionally arranged at the joint of the ceiling machine chassis and the fixing screw rod.
The suspended ceiling wind cabinet capable of reducing low-frequency noise is characterized in that a second glass wool sound absorption layer and a surface cover plate are additionally arranged on the outer side of a wall plate of the cabinet body.
The suspended ceiling wind cabinet capable of reducing the low-frequency noise is characterized in that a T-shaped reinforcing support column is further arranged on the spring shock absorber.
The suspended ceiling wind cabinet capable of reducing the low-frequency noise is characterized in that one wall plate of the suspended ceiling wind cabinet is detachably arranged.
The implementation of the utility model has the following beneficial effects: the inside glass of increasing of unit is cotton, and the panel more changes 50mm thick polyurethane foaming board into, and the unit outside increases the glass cotton + outer apron of different thickness. The optimization of the internal structure realizes the effective absorption of low-frequency sound, and the external part ensures that sound waves reduce outward transmission while absorbing sound. The effect of reducing the noise of the unit is achieved.
Drawings
FIG. 1 is a schematic view of a conventional ceiling-mounted wind cabinet;
FIG. 2 is a schematic view of a ceiling type wind cabinet with reduced noise;
fig. 3 is a partially enlarged connection diagram of the boom.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 2 is a schematic view of a ceiling type wind cabinet with reduced noise; fig. 3 is a partially enlarged connection diagram of the boom. The method mainly comprises the following steps: the device comprises a surface cooler 1, a wall plate 2, a fixed frequency motor 3, a centrifugal fan 4, a ceiling machine underframe 6 and a top cover plate 7; the sound absorption structure comprises a bottom cover plate 8, a right side cover plate 9, a left side cover plate 10, a second glass wool sound absorption layer 11, a spring shock absorber 12, a variable frequency motor 13 and a first glass wool sound absorption layer 14.
Centrifugal fan with inverter motor fixes on the mounting bracket, the internal surface of inner chamber all increases and sets up the cotton sound absorbing layer 14 of first glass, the cotton sound absorbing layer of first glass adopts porous cloth parcel, aim at reduces the fan and leads to the fact the striking of the inside air current tissue of box to the panel because of induced drafting, the structural design principle of noise elimination laboratory is used for reference, break up and reduce the striking of air current to the panel to air current tissue, increase the glass cotton with porous cloth parcel, because the cotton structure of glass is flocculent viscosity, heat conductivity and molecule relaxation process, make the sound movement energy that has rule irreversibly change geothermol power movement energy into, sound just is absorbed by the glass cotton, realize noise cancelling effect. The wall plate of the cabinet body is a polyurethane foam plate with the thickness of 50 mm; the outside of the wallboard of the cabinet body increases and sets up cotton sound absorbing layer 11 of second glass and face apron. The face cover plate comprises a top cover plate 7; a bottom cover plate 8, a right side cover plate 9 and a left side cover plate 10. Multiple noise reduction settings are added to further reduce noise.
The mounting frame is mounted on the bottom frame of the ceiling machine through a spring shock absorber, and a bottom frame T-shaped reinforcing support column is additionally arranged; four fixed beams of the original underframe, and no reinforcing beam is arranged in the middle. The optimized chassis: on the basis of the existing design, a T-shaped reinforcing support column is added below a fan shock pad, and the support of a ceiling machine chassis on a bottom plate is added. The running vibration of the wind system is reduced, and the noise is transmitted outside through the low panel of the unit. The furred ceiling machine chassis passes through clamping screw 16 and installation stage fixed connection, and rubber shock pad 15 is installed additional to furred ceiling machine chassis and 16 junctions of clamping screw, and the vibration that reduces the unit passes through the screw rod, arouses the vibration of floor concrete layer structure.
An access door is generally provided for easy access, but a certain gap must exist between the access door and the door frame, so that internal noise may be transmitted from the gap. According to the ceiling air cabinet, the design of the access door is removed, and one side wall plate of the ceiling air cabinet is detachably arranged, so that the problem that a certain gap exists between the access door and a door frame is solved. Ensuring that internal noise and low frequency tones are not transmitted outside.
Taking a 5000m3/h wind cabinet as an example, the total static pressure of the unit is within 500Pa, the noise of the unit is allowed to be 65dB (A), and the actual measurement noise of the unit is 62.5dB (A) according to the traditional structure design time of the attached drawing 1. The unit designed by adopting the technical structure for eliminating the low-frequency noise reduction noise is tested in a silencing laboratory of a laboratory, and the noise value of the unit can reach 48dB (A) under the conditions of the same equipment, the same air volume, the same pressure head and the same motor current. The noise can be reduced by 14.5-16.5 decibels.
While the utility model has been described with reference to a particular embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (4)
1. A suspended ceiling air cabinet capable of reducing low-frequency noise comprises a basically closed cabinet body, wherein a suspended ceiling chassis, a centrifugal fan, a surface cooler and a variable frequency motor are arranged in the cabinet body, the surface cooler is arranged on one side of an inner cavity of the cabinet body, a mounting frame is arranged on the other side of the inner cavity, and the centrifugal fan and the variable frequency motor are fixed on the mounting frame; the wall plate of the cabinet body is a polyurethane foam plate with the thickness of 40-70 mm; the mounting rack is mounted on the bottom frame of the ceiling machine through a spring shock absorber; the ceiling machine chassis is fixedly connected with the mounting table through a fixing screw rod, and a rubber shock pad is additionally arranged at the joint of the ceiling machine chassis and the fixing screw rod.
2. A suspended ceiling wind cabinet capable of reducing low frequency noise according to claim 1, wherein a second glass wool sound absorbing layer and a cover plate are additionally arranged on the outer side of the wall plate of the cabinet body.
3. A suspended ceiling wind cabinet for reducing low frequency noise according to claim 1, wherein the spring damper is further provided with a T-shaped reinforcing support post.
4. A suspended ceiling wind cabinet for reducing low frequency noise according to claim 1, wherein a wall panel of the suspended ceiling wind cabinet is removably disposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122535732.9U CN216691622U (en) | 2021-10-21 | 2021-10-21 | Ceiling air cabinet capable of reducing low-frequency noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122535732.9U CN216691622U (en) | 2021-10-21 | 2021-10-21 | Ceiling air cabinet capable of reducing low-frequency noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216691622U true CN216691622U (en) | 2022-06-07 |
Family
ID=81830836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122535732.9U Active CN216691622U (en) | 2021-10-21 | 2021-10-21 | Ceiling air cabinet capable of reducing low-frequency noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216691622U (en) |
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2021
- 2021-10-21 CN CN202122535732.9U patent/CN216691622U/en active Active
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