JPH0459533B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cooling device which is equipped with both an air intake port and an air discharge port and which requires sufficient air intake and exhaust;
Related to air-cooled outdoor equipment with noise prevention boxes in air conditioning equipment such as heating equipment and ventilation equipment.

(Prior Art) A conventional chiller unit equipped with a soundproofing device is disclosed in Japanese Utility Model Application No. 54-156855. This involves surrounding almost the entire surface of the chiller unit with a peripheral wall that has an intake port and is lined with sound-absorbing material, and a partition plate is provided inside the peripheral wall to form an intake air passage of arbitrary length. An air intake/exhaust separation plate is provided in the air conditioner, and an intake side air passage and an exhaust port of arbitrary length are formed between this separation plate and a ceiling plate lined with a sound absorbing material.

(Problems to be Solved by the Invention) The chiller unit described in the above conventional technology is equipped with a soundproofing device with a roof that utilizes sound refraction, interference, and sound absorption, and has a sound reduction effect. However, there are limitations, and there are also defects such as the roof being an obstacle to heat radiation.

An object of the present invention is to provide a new air-cooled outdoor equipment noise prevention box that is designed to eliminate the above-mentioned defects.

(Means for Solving the Problems) In order to achieve the above object, the air-cooled outdoor equipment with a noise prevention box in the air conditioning equipment of the present invention includes an outdoor equipment main body 2 with an air cooling fan 1, and an outdoor equipment main body 2 at the front and rear of the outdoor equipment main body 2. A cover part 3 made of a soundproof wall material with a sound absorbing material that is taller than the main body 2 of the outdoor equipment surrounding the left and right sides, and a cover part 3
An outside air inlet 4 provided at the lower side of the wall, an enclosure 7 made of soundproof wall material with sound absorbing material provided outside the inlet 4, and a location on the wall of the enclosure 7 facing the inlet 4. These intake ports 4 and 8 are made of sound-proof wall material with sound-absorbing material, which are installed between the intake ports 4 and 8 in the enclosed room 7. A part of the noise emitted from the outdoor equipment main body 2 with the air cooling fan 1 fixed to the inside of the jammer plate 9 and the upper sides of the front, rear, left, and right walls of the cover part 3 via the installation base part 11 is allowed to pass through. A hollow body 13 having a plurality of hollow pipes 12 having different pipe lengths that produce refraction propagation sound with a phase shift, and a hollow body 13 surrounded by these hollow bodies 13 on the front, rear, left and right sides, allow the remainder of the noise to pass through. It consists of a direct propagation sound outlet/exhaust port 14.

(Example) In the example shown in the figure, the cover part 3 is constructed of a soundproof wall material in which a water-repellent glass wool sound-absorbing material and a water-repellent glass cloth sound-absorbing material support are laminated on the inner surface of a steel plate coated with a synthetic resin. This cover part 3 is placed over the outdoor equipment main body 2 with the air-cooling fan 1 of the air conditioner/heater to surround the entire surface of the main body 2 except for the upper and lower surfaces, and an inlet 4 is provided at the lower side of the left and right walls of the cover part 3.
In addition, a soundproofing device (trade name: Calmson, manufactured by Bridgestone Tire Co., Ltd.) 6, which will be described later, is fixed in a predetermined position on the inside of the upper edges of the front, left, and right walls of the cover part 3 via the upper part 11 of the installation stand. A direct propagation sound outlet/discharge port 14 surrounding the interference type soundproofing device 6 and allowing the remainder of the noise to pass through.
At the same time, an enclosed chamber 7 is provided outside the inlet 4 using the soundproof wall material, and an intake 8 is opened on the wall surface of the enclosed chamber 7 at a location facing the inlet 4. A barrier board 9 made of the above-mentioned soundproof wall material, which is larger than the intake ports 4 and 8, is provided between the intake ports 4 and 8 inside the interior, and the outside air entering from the intake port 8 is blocked by the barrier board. It is configured to enter the suction port 4 by bypassing the outside of the periphery of the tube 9.

As shown in FIGS. 2 and 3, the soundproofing device 6 has a plurality of pipe length differences that allow part of the noise emitted from the outdoor equipment 2 with the air cooling fan 1 to pass through and create refraction propagated sound with a phase shift. The hollow body 13 has a hollow conduit 12 and is used so as to interact with the upper edge 15 of the cover part 3 and the installation base part 11.

(Function) Since the present invention has the above-described configuration, the refraction propagating sound created in the hollow pipe 12 of the hollow body 13 and the noise coming from the discharge port 14, that is, the noise emitted from the discharge port 14 without passing through the hollow pipe 12, are removed from the discharge port. A destructive waterfall interference phenomenon occurs outside the upper part of the hollow body 13 due to a difference in phase with the directly propagated sound that comes out from the hollow body 13 and passes through the hollow body 13, and the sound reduction area is extended to the outer circumference of the upper part of the cylindrical cover part 3 and the same. It is made above the area. At this time, the sound of the cover part 3 made of a soundproof wall material with a sound absorbing material and the soundproof wall material made of a soundproof wall material with a sound absorbing material is also reduced, so that as a result, the entire area around the cover part 3 is reduced in sound synergistically.

The amount of phase shift between refraction propagated sound and directly propagated sound can be determined by the difference in pipe length, etc., and when this amount of shift is increased, the sound reduction area becomes larger.

(Effects of the Invention) The air-cooled outdoor equipment with the noise prevention box in the air conditioning equipment according to the present invention prevents sound refraction and interference due to the presence of the jammer plate 9 and the hollow pipe 12, and sound absorption by the sound-absorbing material. Of course, the sound can be reduced, but in particular, as mentioned in the above operation, the phase shift between the refraction propagation sound and the direct propagation sound is caused by the existence of the hollow pipe 12 and the discharge port 14 of the hollow body 13. and the refraction and interference of the sound due to the destructive interference due to the phase shift,
The sound reduction achieved by sound absorption by the sound absorbing material is further reduced, and it is possible to obtain a significantly higher sound reduction effect than the above-mentioned conventional example. Furthermore, since the top surface is open and there is no roof, the heat dissipation effect is extremely good.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of the entire structure showing an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a perspective view of the soundproofing device. 1...Air cooling fan, 2...Outdoor equipment body, 3...
...Cover part, 4...Intake port, 6...Soundproofing device, 7
...Enclosed room, 8...Intake port, 9...Ziama board, 1
DESCRIPTION OF SYMBOLS 1... Installation stand part, 12... Hollow conduit, 13... Hollow body, 14... Outlet, 15... Upper edge part.

Claims (1)

[Claims] 1 An outdoor equipment main body 2 with an air cooling fan 1 and an outdoor equipment main body 2 surrounding the outdoor equipment main body 2 on the front, rear, left and right sides
Cover part 3 made of soundproof wall material with taller sound absorbing material
, an outside air inlet 4 provided on the lower side of the wall of the cover part 3, an enclosed chamber 7 made of soundproof wall material with sound absorbing material provided outside the inlet 4, and an inlet on the wall of the enclosed chamber 7. 4, and a sound-absorbing material that is larger than the intake ports 4 and 8 provided in the enclosed room 7 between the intake ports 4 and 8. soundproof wall material jama board 9 and cover part 3
The installation stand part 11 is installed inside the upper side of each wall of the front, rear, left, and right walls.
A hollow pipe 12 having a plurality of pipe length differences that allows a part of the noise emitted from the outdoor equipment main body 2 with the air cooling fan 1 to pass through and creates refraction propagation sound with a phase shift is fixed through the air cooling fan 1. A directly propagated sound outlet/discharge port 1 surrounded by the hollow bodies 13 on the front, rear, left, and right sides and allowing the remainder of the noise to pass through.
4. Air-cooled outdoor equipment with a noise prevention box in air conditioning equipment, characterized by comprising: