JP2000337160A - Engine drive generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make cooling air easy to flow and reduce the pressure loss in a radiator to reduce the noise by setting the radiator within an exhaust duct. SOLUTION: A body case 10 has intake and exhaust ports 10a, 10b for taking in and out the air for cooling a generator 12 having electronic parts, a generator board 13 and an engine 11, and intake and exhaust ducts 20, 30 are mounted on the respective ports 10a, 10b. A radiator 15 for cooling the engine 11 is set on the curved part of the exhaust duct 30 with an angle. The air sucked by a cooling fan 16 is carried in the intake duct 20 through an intake duct port 20a, sent into the body case 10 through the intake port 10a to cool the generator board 13, the generator 12, the engine 11 and the radiator 15, and then released to the outside through the exhaust duct 30. The radiator 15 is arranged on the curved part of the exhaust duct 30 with the angle, whereby the radiator 15 functions as the guide plate for the fluid, so that the fluid can be smoothly carried to prevent the increase in pressure loss.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power generator which can be installed outdoors and generates power by driving a water-cooled engine. More specifically, the present invention relates to an overall power generator by changing the arrangement of internal components. The present invention relates to an engine-driven power generation device that reduces noise of a vehicle.

[0002]

2. Description of the Related Art A conventional engine-driven power generator has a power source engine 1 as shown in the sectional view of the conventional structure shown in FIG.
1, a generator 12, a radiator 15, a cooling fan 16, a generator panel 13 and the like are covered by a main body case 10. The main body case 10 is provided with a generator 12 having electronic components weak to high temperatures, an inlet 10a for taking in and out air for cooling the generator panel 13 and the engine 11, and an exhaust port 10b. An intake duct 20 and an exhaust duct 30 are attached to each. A radiator 1 for cooling the engine is provided at the exhaust port 10b.
5 are installed.

The cooling air introduced through the air inlet duct 20 and the air inlet 10a by the rotation of the cooling fan 16 in the main body case 10 cools the generator 12 and the generator panel 13, and then cools the engine 11 and the radiator 15. It is cooled and discharged outside through the exhaust duct 30.

In the engine-driven power generator having such a structure, noise and vibration generated when the engine 11 is driven and noise of the cooling fan 16 are generated by the opening of the main body case, particularly, the exhaust port.
Noise such as leaked sound leaking from the main body 10b and transmitted sound passing through the main body case 10 becomes a problem. For this reason,
Conventionally, the intake duct 20 and the exhaust duct 30 have a sound absorbing structure, and the transmitted sound is reduced by doubling the main body case (Japanese Patent Laid-Open No. 8-240125). In addition, JP
As described in the prior art of JP-A-4531 and JP-A-9-203326, the size of the apparatus is reduced and the noise is reduced by improving the sound absorbing duct structure provided at the intake port.

[0005]

An engine-driven power generator is often used in a factory, a store, or the like to supplement power during a power failure or non-power failure. In factories and stores in densely populated areas, noise from the engine-driven power generator may be a problem in residential areas.Therefore, when installing indoors or installing outdoors, install soundproof walls around the area. It required a costly measure. For this reason, there has been a demand for reducing the noise of the engine-driven power generator itself. In the prior art, a radiator is installed near the opening of the main body case, the high-temperature cooling air that has passed through the radiator is directly discharged to the outside air, and the main body case has substantially the same size as the radiator for installing the radiator. There was an exhaust vent.
The size of the radiator is determined by the calorific value of the engine.

On the other hand, when the equipment inside the main body case becomes smaller due to the digitization of the generator panel and the miniaturization of the high-power generator and the engine, the main body case becomes smaller and the area of the radiator, that is, the area of the exhaust port becomes smaller. The proportion of the cross-sectional area of the main body case increases. For this reason, the cross-sectional area of the exhaust duct becomes large, and in order to achieve a specified noise level, there is a problem that the exhaust duct becomes particularly large and the entire apparatus becomes expensive.

A fan 1 is provided downstream of the radiator 15.
6 are placed close to each other, so that the cooling air
And the disturbed cooling air directly hits the radiator 15, increasing the pressure loss in the radiator and increasing the fluid noise secondary to the radiator due to air turbulence.

Further, since the cooling of the radiator is performed by cooling air whose temperature has increased in the engine portion, the cooling efficiency has been reduced.

SUMMARY OF THE INVENTION The object of the present invention has been improved in view of the above point. An engine drive generator capable of reducing noise from a structural point of view and achieving both low cost and low noise. Is to provide.

[0010]

In order to achieve the above object, a power generator, a power generator, and a power generator are provided in a main body case having an intake port and an exhaust port.
In an engine-driven power generator including an engine, a radiator for cooling the engine, and a fan for cooling the radiator, and an exhaust duct and an exhaust duct at an intake port and an exhaust port, power generation is performed in a main body case having an intake port and an exhaust port. Machine,
An engine, an engine-driven power generator including the engine cooling radiator and the radiator cooling fan, and having an intake duct and an exhaust duct at an intake port and an exhaust port, wherein the radiator is installed in the exhaust duct. I do.

Further, the radiator is installed in the exhaust duct at an angle other than perpendicular to the axial direction of the cooling fan.

Further, the radiator is installed at a bent portion of the exhaust duct installed at the exhaust port at an angle other than perpendicular to the axial direction of the cooling fan.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG.

FIG. 2 shows an engine-driven power generator according to a first embodiment of the present invention. As shown in FIG. 2, the engine-driven generator includes a power source engine 11, a generator 12, a radiator 15, a cooling fan 16, a generator panel 13 and the like, a rectangular parallelepiped main body case which is elongated in the front-back (left-right direction in the drawing) direction. 1
0. The main body case 10 is provided with a generator 12 having electronic components weak to high temperatures, an inlet 10a for taking in and out air for cooling the generator panel 13 and the engine 11, and an exhaust port 10b. An intake duct 20 and an exhaust duct 30 are attached to each. Radiator 1 for cooling the engine
5 is installed at an angle to the bent portion of the exhaust duct 30.

The generator panel 13 is provided with a switch for starting and stopping the engine 11, a meter indicating an operating state such as an engine speed and a power generation frequency, and various electric parts. A muffler 14 for reducing exhaust noise accompanying the combustion of 11 is attached. The engine 11 and the cooling fan 16 are connected by a fan belt 17. In addition, fan belt 1
The fan 16 may be directly driven by a motor or the like instead of the fan 7. Further, the engine 11 and the generator 12 may be connected via a speed reducer or a speed increaser.

The air drawn in by the cooling fan 16 passes through the air inlet duct 20 through the air inlet duct 20 and is sent into the main body case 10 through the air inlet 10a, and the generator panel 13, the generator 12, and the engine 11 are provided. And radiator 1
5 is cooled and discharged to the outside through the exhaust duct 30a.

At the bent portion of the exhaust duct 30, the internal fluid is bent at a right angle, so that the pressure loss increases.
As shown in the figure, by arranging the radiator 15 at an angle at the bent portion of the exhaust duct 30, the radiator 15 functions as a fluid guide plate, and the fluid can flow smoothly. An increase in pressure loss can be prevented.

Further, since the distance between the radiator 11 and the cooling fan is longer than before, the turbulence of the air due to the rotation of the cooling fan 16 directly hits the radiator, the fluid noise generated by the rotation of the fan, the backflow of the fan, and the pressure at the radiator. Loss can be reduced. Further, by reducing the pressure loss, it is possible to reduce the size of the cooling fan 16 and reduce the noise of the cooling fan 16 itself by reducing the rotation speed.

The radiator cooling air cools the radiator evenly after the turbulence is removed, thereby improving the cooling efficiency.

In addition, since the radiator is installed obliquely,
Since a radiator larger than before can be installed, cooling efficiency is improved.

Further, since the radiator is installed obliquely in the exhaust duct, resonance occurring in the duct can be prevented.

A second embodiment of the present invention will be described with reference to FIG.

The structure of the engine generator is the same as that of the first embodiment. In the second embodiment, the radiator 1
5 is attached to the outlet 30a of the exhaust duct 30 horizontally with the ground. As for the position of the radiator,
Instead of the position of the outlet 30a, a position in the middle of the exhaust duct 30 may be used. In the conventional structure, since the distance between the cooling fan 16 and the radiator 15 is short, fluid noise caused by the rotation component of the rotation of the cooling fan 16 directly hitting the radiator 15 has been a problem.

In the structure of this embodiment, the distance between the radiator and the fan is long, so that there is no influence of the swirling component, and the cooling wind is also perpendicularly incident on the radiator 15, so that the velocity distribution of the cooling wind before incidence is obtained. And the cooling efficiency is improved. Further, the resistance to the cooling fan 16 is reduced, so that the fan efficiency is improved.

[0025]

According to the present invention, in the engine generator, the radiator is installed in the exhaust duct at an angle other than perpendicular to the axial direction of the cooling fan. And the pressure loss in the radiator is reduced, so that noise can be reduced and cooling efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a conventional engine-driven power generator.

FIG. 2 is a partial cross-sectional view of the engine-driven power generator according to the first embodiment of the present invention.

FIG. 3 is a partial sectional view of an engine-driven power generator according to a second embodiment of the present invention.

[Explanation of symbols]

10: body case, 11: engine, 12: generator, 1
3 ... control panel, 14 ... silencer, 15 ... radiator, 16 ...
Fan, 17 ... fan belt, 18 ... shaft, 19 ...
Partition wall, 10a: main body intake port, 10b: main body exhaust port, 20
… Inlet duct, 20a… duct intake port, 30… exhaust duct, 30a… duct exhaust port.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasushi Takano 502, Kandate-cho, Tsuchiura-shi, Ibaraki Inside Machinery Research Laboratory, Hitachi, Ltd. (72) Inventor Fumi Yoshida 3-2-2, Sachicho, Hitachi-shi, Ibaraki Stock Within Hitachi Engineering Services

Claims (1)

[Claims] In a main body case having an intake port and an exhaust port,
In an engine-driven power generator including a generator, an engine, a radiator for cooling the engine, a fan for cooling the radiator, and an intake duct and an exhaust duct at an intake port and an exhaust port, the radiator is installed in the exhaust duct. An engine-driven power generator characterized by the above-mentioned.