JPH07101005B2 - Water-cooled cooling system for soundproof engine generator - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a water-cooled cooling device for a soundproof engine generator, and is a technique for improving the soundproof performance while requiring a small installation space for the engine generator. .

<< Basic Structure as Premise >> Some water-cooled cooling systems for soundproof engine generators have the following basic structure.

For example, as shown in FIG. 1 and FIG. 2 or FIG. 3, in the soundproof case 2, an exhaust passage B is formed from the front part to the upper part of the machine room A, and the suction path is formed in the rear part of the machine room A. The air outlet X is opened, the air outlet Y is opened on the lee side of the exhaust passage B, the water-cooled engine 6 is arranged in the front part of the machine room A, and the generator 7 is arranged in the rear part of the machine room A. A radiator 20 is provided on the leeward side of the radiator fan 21, and a radiator fan 21 is provided between the air intake port X and the machine room A and the air exhaust path B to the air exhaust port Y. After sucking from the machine room and passing it through the machine room A in the forward direction to cool the generator 7 and the engine 6,
The radiator 20 is cooled by discharging the air from the air outlet Y through the air exhaust passage B.

<< Prior Art >> In the above-mentioned basic structure, conventionally, as a structure for embodying the soundproof type engine generator 1, as a structure of the Japanese Utility Model Publication No. 61-2272.
There is one shown in the publication.

As shown in FIG. 3, this is the radiator 20 and the radiator fan 21 in the front space of the engine 6 in the front part of the machine room A.
Is provided, and the end portion of the exhaust path B is extended rearward so that the engine 6
It is located on the upper side of.

<< Problems to be Solved by the Invention >> The above conventional structure has the following problems.

(A) Since the length of the soundproof case 2 in the front-rear direction is increased by the thickness of the radiator 20, the soundproof engine generator 1 has a large installation space.

(B) The length of the exhaust passage B in the front-rear direction of the upper exhaust passage 10 is short and the total length must be short. Therefore, the exhaust path B
Even if the sound absorbing material is attached to the inner peripheral wall of the engine, the noise of the engine 6 cannot be sufficiently absorbed, and the sound leakage from the exhaust port Y is large.

It is an object of the present invention to reduce the installation space of a soundproof engine generator and improve the soundproof performance.

<< Means for Solving the Problems >> In order to achieve the above-mentioned object, the present invention has, in the basic structure as shown in, for example, FIGS. Side, the radiator chamber C is provided in the upper space of the generator 7, the bottom wall of the radiator chamber C is located lower than the upper surface of the engine 6, and the radiator chamber C communicates with the outlet of the exhaust passage B. Radiator inside
20 is provided, an exhaust port Y is opened on the leeward side of the radiator 20, an auxiliary air intake port 26 is opened in the radiator chamber C, and outside air can be sucked in from the auxiliary air intake port 26. Sound absorbing material on the peripheral surface of the exhaust path 10 near the room C
It is characterized by wearing 15.

<< Operation >> The present invention operates as follows.

When the radiator fan 21 operates, a part of the cooling air is sucked in through the air intake port X, passes through the machine room A in the forward direction, cools the generator 7 and the engine 6, and then passes through the exhaust path B to the radiator room. Flow into C. In addition to being sucked in through the air intake port X, the cooling air flows directly into the radiator chamber C through the sub air intake port 26. The cooling air that has flowed into the radiator chamber C through the machine room A and the auxiliary air inlet 26 cools the radiator 20 and is then discharged from the air outlet Y.

On the other hand, the noise of the engine 6 is transmitted from the machine room A to the exhaust path B and the radiator room C by the air blown by the radiator fan 21.
It tries to leak to the outside through the exhaust port Y. However, the cooling air to the radiator chamber C is diverted to the machine room A and the auxiliary air intake port 26 as described above, and the amount of air blown through the machine room A is the generator 7 and the engine 6 in the machine room A. Since a relatively small amount that can cool the engine 6 is sufficient, the noise of the engine 6 leaking from the exhaust port Y to the outside is reduced. Moreover, since the noise of the engine 6 passing through the exhaust path B is absorbed by the sound absorbing material 15, the noise of the engine 6 leaking into the radiator chamber C is further reduced.

Moreover, since the upper surface of the generator 7 is lower than the upper surface of the engine 6, a space is generated above the generator 7. Therefore, by providing the radiator chamber C in this space, the radiator chamber C is prevented from protruding from the upper surface of the soundproof case 2, and the overall height of the soundproof case 2 is lowered.

«Examples» Examples of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view of a soundproof engine generator, and FIG. 2 is II- of FIG.
It is a sectional view taken along the line II.

In the figure, 1 is a soundproof type engine generator for a heat supply power generator, 2 is a soundproof case, the soundproof case 2 is formed long in the front-rear direction, an arrow F indicates the front side, and an arrow R indicates The rear side is shown.

The soundproof case 2 includes a front plate 2a, a rear plate 2b, a top plate 2c,
The bottom surface 2d and the side surfaces 2e and 2f cover the six surfaces in a hermetically sealed manner, and the machine room A, the air exhaust path B, and the radiator room C are inside thereof.
Is formed, and the side surface plate 2e side is the maintenance side.

In the machine room A, a vertical water-cooled gas engine 6 and a generator 7 are supported in the front-back direction on a support base 3 via a plurality of anti-vibration rubbers 4. The engine 6 drives the generator 7 to generate electric power, and at the same time, the exhaust heat generated in the engine 6 is recovered as hot water by the exhaust gas heat exchanger and the cooling water heat exchanger. The rear part of the above machine room A
The air intake X formed in the lower part of the rear plate 2b communicates with the outer space of the soundproof case 2.

The air exhaust passage B is composed of a front air exhaust passage 9 provided in the front space of the engine 6 and an upper air exhaust passage 10 provided in a corner of the soundproof case 2 in the upper space of the engine 6. The front space and the lower space of the front exhaust passage 9 communicate with each other through a communication hole 12. A ventilation fan 13 is provided in the communication hole 12 and is linked to the engine 6. Further, a sound absorbing material 15 is attached to the inner peripheral wall of the upper exhaust passage 10.

The radiator chamber C is formed in the soundproof case 2 behind the engine 6 and above the generator 7, and is deeper than the exhaust passage B. That is, a partition wall 18 for partitioning the machine room A and the radiator room C is provided, which is a side wall 18a and a bottom wall 18b.
Composed of and. The side wall 18a is dropped from the upper surface plate 2c toward the front part of the generator 7, and the bottom wall 18b extends rearward from the lower end of the side wall 18a along the upper side of the generator 7.

The radiator 20 is disposed in the radiator chamber C with the air-absorption surface facing downward. And the radiator in the radiator room C
The windward side of 20 is communicated with the exhaust path B, and the exhaust port Y is opened in the upper surface plate 2c forming the upper wall of the radiator chamber C so as to face the exhaust surface of the radiator 20. This radiator
A radiator fan 21 and a fan driving electric motor 22 are supported by a baffle plate 24 at a position below 20. Also, radiator room C
An auxiliary air intake port 26 is formed in the upper part of the upper surface plate 2b forming the rear wall. The auxiliary air inlet 26 is configured to be openable / closable by a hinge 27 and a valve plate 28, and is opened when the radiator chamber C is under a negative pressure to suck the outside air.

Then, when the amount of exhaust heat recovery is small and the cooling water temperature of the engine 6 is high during operation of the engine generator 1,
In addition to the ventilation fan 13, a radiator fan 21 is driven by a fan driving electric motor 22. The cooling air sucked from the air intake port X by the wind power sent from both fans 13 and 21 is transferred to the machine room A.
To cool the generator 7 and the engine 6 and then flow into the radiator chamber C through the exhaust passage B. The cooling air and the cooling air sucked in from the auxiliary air intake port 26 are combined with the radiator 20.
After being cooled, the air is discharged from the air outlet Y. On the other hand, when the exhaust heat recovery amount is large and the cooling water temperature of the engine 6 is sufficiently low, the operation of the radiator fan 21 is stopped and the auxiliary air intake port
26 is closed, and ventilation of the inside of the machine room A is performed only by the ventilation force of the ventilation fan 13.

In the above embodiment, the soundproof engine generator 1 is configured for the heat supply power generator, but it may be configured for power generation only, such as an engine welder.

Further, although the water-cooled engine 6 is composed of a vertical gas engine, it may be a horizontal engine, a diesel engine or a gasoline engine.

Further, an exhaust port Y is formed on the upper surface plate 2c, and a radiator is attached to this.
Although it has been stated that the 20 faces the upright posture, instead of this, the rear plate 2b or the side plates 2e and 2f may be formed with the exhaust port Y so that the radiator 20 faces the upright posture. .

Further, the external space of the soundproof case 2 and the rear part of the machine room A may be communicated with each other through an air intake duct instead of being directly communicated with the air intake X formed on the outer surface plate of the soundproof case 2. In this case, the air intake port X is formed at the wind lower end of the air intake duct. Similarly, the outer space of the soundproof case 2 and the radiator chamber C are the exhaust ports Y formed on the outer surface plate of the soundproof case 2.
Instead of directly communicating with each other, they may communicate with each other via an exhaust duct, and in this case, an exhaust port Y is formed at the upper end of the exhaust duct.

Further, the radiator fan 21 may be provided between the air intake X, the machine room A and the air exhaust path B to reach the air exhaust Y. For example, the ventilation fan 13 may be omitted and the radiator fan 21 may be provided at that position. It may be linked to the engine 6.

<< Effects of the Invention >> The present invention has the following effects because it is configured and operates as described above.

Since the radiator chamber was installed in the space created above the generator because the upper surface of the generator was lower than the upper surface of the engine, the length of the soundproof case in the front-rear direction was longer than that in the case where the radiator was installed in the front space of the engine. The height of the soundproof engine generator can be reduced as compared with the case where the radiator chamber is provided above the engine. That is, the space inside the soundproof case is effectively used, and the entire soundproof engine generator is made compact. As a result, the installation space can be reduced.

In addition, the cooling air to the radiator chamber flows into the machine room and the auxiliary air intake port in a branched manner, so that the cooling air to the radiator room flows through the machine room as compared with the case where all the cooling air flows into the radiator room via the machine room. The amount of air blown can be reduced to a level at which the generator / engine can be cooled. Therefore, it is possible to reduce the noise of the engine leaking to the outside through the route of the machine room, the exhaust passage, the radiator chamber, and the exhaust port due to the cooling air. Moreover, the noise of the engine passing through the exhaust path is sufficiently absorbed by the sound absorbing material. As a result, sufficient cooling air to the radiator can be secured without impairing the cooling of the generator / engine in the machine room, and the soundproof performance of the soundproof engine generator can be maintained high.

That is, despite the relatively simple structure in which a radiator chamber is provided in the space above the generator, a secondary air intake port is opened in this radiator chamber, and a sound absorbing material is attached to the exhaust path, a soundproof engine generator The soundproof engine generator can be made compact by effectively utilizing the space inside the soundproof case while maintaining the high soundproof performance of.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view of a soundproof engine generator, and FIG. 2 is II- of FIG.
FIG. 3 is a sectional view taken along the line II, and FIG. 3 is a view corresponding to FIG. 1 showing a conventional example. 2 ... Soundproof case, 6 ... Engine, 7 ... Generator, 10
...... Upper exhaust passage, 15 ...... Sound absorbing material, 20 ...... Radiator, 21
…… Radiator fan, 26 …… Auxiliary air intake, A …… Machine room, B …… Exhaust air passage, C …… Radiator room, X …… Air intake, Y …… Exhaust air.

Claims (1)

[Claims] 1. A soundproof case (2) having an exhaust passage (B) extending from a front part to an upper part of a machine room (A), and an air intake port (X) at a rear part of the machine room (A). And an air outlet (Y) on the lee side of the exhaust passage (B), a water-cooled engine (6) at the front of the machine room (A), and a rear portion of the machine room (A). A generator (7) is installed in the machine room, a radiator (20) is provided on the lee side of the machine room (A), and a radiator fan (21) is installed from the air intake (X) to the machine room (A) and the exhaust air. It is provided between the air passage (B) and the air outlet (Y), and the cooling air is sucked from the air inlet (X) by the wind force of the radiator fan (21), and the machine room (A) is directed forward. Pass through the generator (7) and the engine (6)
After cooling the air, the radiator (20) is discharged through the exhaust passage (B) and out the exhaust outlet (Y).
A water-cooled cooling device for a soundproof engine generator configured to cool a radiator chamber in a space above the generator (7) behind the engine (6) in the soundproof case (2). (C) is provided, the bottom wall of the radiator chamber (C) is positioned lower than the upper surface of the engine (6), and the radiator chamber (C) communicates with the outlet of the exhaust passage (B). Inside the radiator chamber (C), the radiator (2
0) is provided, the exhaust port (Y) is opened on the leeward side of the radiator (20), the auxiliary air intake port (26) is opened in the radiator chamber (C), and the outside air air is discharged from the auxiliary air intake port (26). Of the radiator chamber (C) of the exhaust passage (B).
A water-cooled cooling device for a soundproof engine generator, characterized in that a sound absorbing material (15) is attached to the peripheral surface of the exhaust passage (10) near the side.