JPS6325886Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cooling device for an internal ventilation type generator of a soundproof engine generator.

<Prior Art> The basic structure of this device is a soundproof case 2
A soundproof room 3 is formed inside the soundproof room 3, a cooling air outlet 15 is provided at the front part 3a of the soundproof room 3, and a cooling air inlet 13 is provided in the upper half of the rear part 3b. A radiator 4 is attached to the cooling air outlet 15.
A radiator 4, a radiator fan 11, a water-cooled engine 5 and a generator 6 are arranged, the generator 6 is configured as an internal ventilation type with a fan 19 inside, the cooling air is sucked in from a cooling air inlet 13 by the blowing force of the radiator fan 11, and the inside of the soundproof room 3 is cooled from the rear part 3b to the front part 3c.
On the way to a, the generator 6 and the engine 5
The present invention relates to a generator cooling device for a soundproof engine generator, which is configured to cool the engine and exhaust the cooled air from a radiator (4) to the outside of a cooling air outlet (15).

Conventionally, in the internal ventilation type generator 6, a large amount of noise generated inside the generator 6 leaks into the atmosphere from the air exhaust port 22 at the tip of the air exhaust path 14 via the air exhaust port of the generator 6 and the air exhaust path 14. In order to reduce this noise, the air exhaust port 22 is covered with a soundproof case.
By opening the bottom of the case 2 near the ground, the noise emitted from the air exhaust port 22 can be removed from the soundproof case 2.
The idea was to absorb it between the bottom surface of the body and the ground.

However, this case has the following drawbacks.

That is, since the air exhaust port 22 is close to the ground, the air exhaust port 22 may become blocked by mud or the like at a civil engineering work site, making it impossible for the generator 6 to be cooled by ventilation, leading to accidents such as overheating and burnout. .

Therefore, in order to eliminate this burnout accident, it is conceivable to open the atmospheric air exhaust port 22 at a high position from the ground, but this does not reduce the noise.

The purpose of this invention is to eliminate overheating and burnout accidents of generators while maintaining high soundproofing performance of the generator.

<Means for Solving the Problems> In order to achieve the above object, the present invention is constructed as shown in FIGS. 1 and 2, for example.

That is, an atmospheric air exhaust port 22 is opened at a location close to the ground on the lower side of the soundproof case 2, and a main air exhaust port 20 and an auxiliary air exhaust port 21 are opened at the front of the casing 6a of the generator 6.
An air intake port 30 is opened at the rear, and the auxiliary air exhaust port 21 is set to have a smaller opening area than the main air exhaust port 20, and the main air exhaust port 20 is communicated with the atmospheric air exhaust port 22 via the air exhaust path 14, and the auxiliary air exhaust port 21 is set to have a smaller opening area than the main air exhaust port 20. Connect the air outlet 21 to the air exhaust path 14
The soundproof room 3 is shown facing away from the room.

<Effect> Next, its effect will be explained.

The exhaust air that has cooled the inside of the generator 6 is mainly exhausted from the main exhaust port 20 having a large opening area to the outside of the atmospheric exhaust port 22 via the air exhaust path 14 . The noise emitted from the air exhaust port 22 is absorbed by the lower surface of the soundproof case 2 and the ground, and is reduced.

Furthermore, even if the air exhaust port 22 is blocked due to adhesion of mud and air cannot be exhausted from the main exhaust port 20 at a civil engineering work site, etc., the cooling exhaust air inside the generator 6 is exhausted from the auxiliary exhaust port 21. and released into the soundproof room 3.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a longitudinal side view of an engine generator, which is a soundproof engine working machine.
The engine 5 and the generator 6 driven by the engine 5 are arranged in order from the front part 3a, and the partition plate 7 above the engine 5 and the generator 6 and the upper wall 2a of the soundproof case 2
A muffler 9 and a fuel tank 10 are provided with a partition wall 8 between them.

Each of these devices 5, 6, 9, and 10 is cooled by the cooling air in the cooling air passage W formed in the soundproof case 2 by the air blown by the radiator fan 11 driven by the engine 5. It's becoming like that.

That is, when the radiator fan 11 rotates, the radiator fan 11 uses its blown force to take in cooling air from the cooling air intake window 12 formed in the upper part of the side wall 2b of the soundproof case 2, passes through the side of the fuel tank 10, and cools the soundproof case. The soundproof room 3 is entered through a cooling air intake 13 provided above the rear part 3b of the room 3.

The cooling air that has entered the soundproof room 3 passes through the side of the engine 5 and is discharged from the radiator 4 to the outside of the cooling air outlet 15, and after passing through the inside of the generator 6, it passes through a duct provided at the bottom 2c. It is divided into two parts: one is discharged to the outside through the (exhaust air passage) 14 and the other is discharged to the outside from an atmospheric exhaust port 22, which will be described later.

A part of the cooling air taken into the radiator 4 through the side of the engine 5 cools the oil pan 5a below the engine 5, and then is sucked into the radiator fan 11 from the front lower part of the engine 5. It's becoming like that.

The cooling exhaust air that has been passed through and cooled the radiator 4 by the radiator fan 11 is sent from the cooling air outlet 15 to the ventilation chamber 1.
6, and directly open the ventilation window 1 with the air distribution plate 17 above it.
The air is discharged to the outside in two parts: one is discharged from the air outlet 8a, and the other is discharged to the outside from the exhaust window 18b after cooling the muffler 9.

On the other hand, as shown in FIG.
The cooling air is sucked in from the rear air intake port 30, and most of the cooling air is sucked into the case of the generator 6 below the fan 19.
The air is discharged from the main exhaust port 20 that opens in the casing 6a, and the remaining part is released from the auxiliary exhaust ports 21 that have a smaller opening area than the main exhaust port 20 on both sides of the casing 6a and open into the soundproof room 3. released.

The cooling exhaust air discharged from the main exhaust outlet 20 is discharged to the outside through the atmospheric exhaust outlet 22 through a duct 14 provided on the bottom wall 2c of the soundproof case 2.

The auxiliary air exhaust port 21 opens at a position separate from the duct 14, and mainly functions when the above-mentioned atmospheric air exhaust port 22 is blocked with mud or sand, and its function will be explained next.

That is, the atmospheric air exhaust port 22 with which the main air exhaust port 20 communicates.
is opened near the ground G and the wheels H at the bottom of the soundproof case 2 in order to improve the soundproofing performance by absorbing the noise leaking from the ground G.
If the air exhaust port 22 is blocked by mud or sand from the ground or the ground G, and air cannot be exhausted from the main exhaust port 20, the generator 6
The cooling air sucked in by the fan 19 is discharged into the soundproof room from the left and right auxiliary exhaust ports 21.

The cooling exhaust air from the auxiliary exhaust outlet 21 released into the soundproof room 3 merges with the cooling air heading directly towards the radiator 4 from the cooling air intake 13, passes through the radiator 4, the cooling air outlet 15, The air is exhausted from the exhaust chamber 16 to the outside air as described above.

Further, an air cleaner 23 is provided above the generator facing the cooling air passage W of the soundproof room 3.

In order to improve the efficiency of assembly, this air cleaner 23 and a fuel filter 25 are attached in advance to a bracket 24 made of sheet metal, and this bracket 24 is formed to protrude from the casing 6a of the generator 6. It is fixed to the boss 26 with screws 27.

<Effects> The present invention is configured and operates as described above, and thus has the following effects.

The exhaust air that has been ventilated and cooled within the generator is mainly discharged into the atmosphere from the air exhaust port, so it is possible to prevent equipment such as the engine inside the soundproof room from overheating.

Moreover, the noise of the generator discharged into the atmosphere from the air exhaust port is absorbed by the bottom surface of the soundproof case and the ground, thereby reducing the noise.

In addition, even if the air exhaust vent is blocked by mud or other factors at a civil engineering construction site, the cooling exhaust air inside the generator will escape into the soundproof room through the auxiliary exhaust vent, ensuring ventilation cooling inside the generator and generating power. It is possible to eliminate accidents caused by machine overheating and burnout.

The structure for this purpose is as simple as opening an auxiliary exhaust port in the generator casing toward the soundproof room, and it can be easily implemented at low cost, and can also be easily implemented on existing equipment. be able to.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of a soundproof engine generator, and FIG. 2 is a sectional view taken along the line -- in FIG. 1. 2... Soundproof case, 3... Soundproof room, 4... Radiator, 5... Engine, 6... Generator, 6a...
...6 casing, 11...radiator fan,
13...Cooling air inlet, 14...Exhaust duct (duct),
15...Cooling air outlet, 19...6 fans, 20
...Main air exhaust port, 21...Auxiliary air exhaust port, 22...Atmospheric air exhaust port, 30...6 air intake port.

Claims (1)

[Scope of Claim for Utility Model Registration] A soundproof room 3 is formed in the soundproof case 2, a cooling air outlet 15 is provided in the front part 3a of the soundproof room 3, a cooling air inlet 13 is provided in the upper half part of the rear part 3b, The radiator 4 is attached to the cooling air outlet 15, and the radiator 4, radiator fan 11, and water-cooled engine 5 are installed in the soundproof room 3 in order from the front part 3a to the rear.
and a generator 6 are arranged, and the generator 6 is constructed of an internal ventilation type inside a fan 19, and the cooling air is sucked in from the cooling air inlet 13 by the blowing force of the radiator fan 11, and the inside of the soundproof room 3 is
In a generator cooling device for a soundproof engine generator configured to cool the generator 6 and engine 5 while flowing from b to the front part 3a, and discharge the cooling air from the radiator 4 to the outside of the cooling air outlet 15, An atmospheric air exhaust port 22 is opened at the bottom of the soundproof case 2 near the ground, and a main air exhaust port 2 is opened at the front of the casing 6a of the generator 6.
0 and an auxiliary exhaust port 21 are opened at the rear, and an air intake port 30 is opened at the rear, and the auxiliary exhaust port 21 is set to have a smaller opening area than the main exhaust port 20. A generator cooling device for a soundproof engine generator, characterized in that the auxiliary air exhaust port 21 is in communication with the soundproof room 3 at a position away from the air exhaust path 14.