JPS6313399Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a soundproof motor generator that can effectively suppress a temperature rise inside a soundproof box.

A power generator that uses an engine to drive a generator is designed for portability and mobility.
Usually, it is housed in a box or attached to a frame. Among these, for those that are housed in a box, the box is made to have a soundproof structure so that the sound generated by the engine is not emitted to the outside. When a box is made to have a soundproof structure like this, it goes without saying that there are no holes or gaps as much as possible, so the heat generated by the engine tends to get trapped inside the box.
The temperature inside the box increases. If the temperature rises, it will affect each part, so depending on the structure,
It becomes necessary to suppress the temperature rise.

Therefore, conventionally, a cooling air generation fan driven by the engine has been provided, and the engine and generator are cooled with the cooling air generated by this cooling air generation fan (hereinafter referred to as the fan), and the heat is trapped inside the box. I try to prevent this. However, in the conventional type, there was a risk that the cooling air that cooled the engine and became high temperature would leak into the inside of the box. Therefore, in order to solve this problem, instead of using the so-called push-in type, which cools the generator etc. with the cooling air generated by a fan, we adopted the so-called suction type, which uses a fan to suck out the air inside the box and exhaust it outside the box. was produced, but this had the drawback of poor cooling efficiency.

The present invention has been developed in view of this point, and eliminates the above-mentioned drawbacks of the conventional ones. For this purpose, the present invention houses an engine and a generator driven by the engine in a soundproof box, and provides a cooling duct surrounding the cylinder head and exhaust muffler of the engine, and at one end of the cooling duct is provided with a cooling duct that surrounds the cylinder head and exhaust muffler of the engine. A push-in cooling fan that is driven by
In a soundproof motor generator, the other end is an outlet facing the outside of the soundproof box, and the soundproof box has an intake port in the lower part of the soundproof box, and a heat absorption duct is provided with one end opening in the upper part of the inside of the soundproof box. The other end of the heat absorption duct is connected to an air intake port of a cooling air generation fan driven by the engine.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 1. Reference numeral 1 is a soundproof box which can be easily moved by wheels 2 attached to the bottom thereof. Inside the soundproof box 1 is an engine 3.
A generator 4 driven by this engine 3 is housed. 5 is a muffler for the engine exhaust system, and 6 is a fuel tank. The engine 3 is equipped with a push-in fan 7, which draws air from an intake port 8 provided at the bottom of the soundproof box 1 to an exhaust port 9 provided at the top of the soundproof box 1, as indicated by the solid line arrow. The engine 3 and generator 4 are cooled by flowing as shown.

One end of a heat absorption duct 10 is opened at an upper part near the ceiling inside the soundproof box 1. This heat absorption duct 10 has a pipe diameter suitable for sucking the high temperature air inside the soundproof box 1, and the other end is connected to the air suction port 11 of the fan 7.

In this soundproof engine generator configured as described above, when the engine 3 is operated, the fan 7 driven by the engine 3 generates an air flow as shown by the solid arrow as described above, thereby cooling the inside of the soundproof box 1. I will do it, but
At the same time, the high temperature air accumulated above the soundproof box 1 is sucked into the heat absorption duct 10, flows as shown by the broken line arrow, flows to the air suction port 11 of the fan 7, and then flows as shown by the solid line. , will be discharged to the outside of the soundproof box 1. Therefore, unlike the conventional case, high temperature air does not accumulate inside the soundproof box 1. Note that when the air flows in this way, the temperature of the cooling air is low because the fresh air that is separately sucked into the soundproof box 1 is sent out together.

What is shown in FIG. 2 is another embodiment of the present invention. In this case, the ceiling of the soundproof box 1 is shaped like a roof, and one end of the heat absorption duct 10 is opened at the top of the roof. With this configuration, air whose temperature has increased can be drawn in more efficiently.

Since the present invention is constructed as described above, it is possible to use push-in cooling while solving the phenomenon of high-temperature air trapped inside the soundproof box, which was the only drawback of conventional cooling. Therefore, the temperature inside the soundproof box is kept low, the cooling effect is improved, and a smaller fan can be used for sufficient cooling.
The whole becomes smaller and lighter. Furthermore, since the fan can be smaller, wind noise can be reduced and efficiency can also be improved. Furthermore, since the configuration is simple, a conventional one can be modified and implemented.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of another embodiment of the present invention. 1... Soundproof box, 3... Engine, 4... Generator, 7... Fan, 10... Heat absorption duct, 11
...Air intake port.

Claims (1)

[Scope of utility model registration request] An engine and a generator driven by the engine are housed in a soundproof box, and a cooling duct is provided surrounding the cylinder head and exhaust muffler of the engine,
A power generator, which has a push-in cooling fan driven by the engine at one end of the cooling duct, an exhaust port facing the outside of the soundproof box at the other end, and an intake port at the lower part of the soundproof box. A heat absorbing duct having one end opened at an upper portion inside the soundproof box is provided, and the other end of the heat absorbing duct is connected to an air intake port of a cooling air generation fan driven by the engine. A soundproof power generator.