JP4681525B2 - Intake hood for engine generator - Google Patents

Description

  The present invention relates to a technology for constructing a drain pipe provided in an intake hood of an engine power generator.

2. Description of the Related Art Conventionally, an engine power generation apparatus that can supply electric power from a generator using engine drive as power is known. Engine power generators are used in various ways as power supply devices during disasters or as cogeneration systems including air conditioning and hot water supply.
The engine power generator is composed of a package containing an engine and a generator inside. The engine power generator needs to release waste heat from the engine and the generator inside the package. Therefore, the engine power generation device has a ventilation structure so that external air is ventilated inside the package.

The engine power generator may be installed outdoors. At this time, rainwater may enter the engine power generator. Rainwater erodes equipment and components inside the package.
On the other hand, a drainage mechanism is not configured inside the package so that a fuel leak should not affect the outside of the package. That is, the rainwater that has once entered the package is not drained to the outside. For this reason, various measures for preventing intrusion of rainwater are taken in the engine power generator.

For example, a configuration in which an intake hood is provided at an intake port of an engine power generation device is known as a countermeasure for preventing rainwater intrusion. The intake hood is configured to be open at the bottom, and covers the intake port from the outside of the package.
In addition, an intake hood in which a rain gutter is provided on the outer edge around the opening of the intake hood is also known. This rain gutter can reliably collect rainwater dripping along the outer surface of the intake hood.
Furthermore, a drain pipe provided with a hole in the gutter and extending downward from the hole is also known. This drainage pipe can reliably drain the rainwater collected in the gutter to the outside.

As an example of these water drain configurations, Patent Document 1 discloses an intake hood that is attached to an intake duct opening of an engine. The rain gutter of the intake hood extends with one end facing downward.
Japanese Utility Model Publication No.59-18621

Conventionally, a round pipe is often used as the drain pipe. Round pipes often corroded because they could not be painted sufficiently. Further, the water draining structure of Patent Document 1 is a complicated structure that can be formed only with an integrally molded resin.
Therefore, the problem to be solved is to provide a water drain pipe having corrosion resistance in the intake hood of the engine power generator.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, the air intake mechanism and the exhaust port are opened on the side surface to constitute a ventilation mechanism, the intake port is covered outside the package, and an opening is provided below the air intake. An engine power generator comprising: an intake hood provided with a gutter at an outer edge around the lower side of the opening; and a drain pipe provided with at least one drainage hole at the bottom of the gutter and extending downward from the drainage hole The cross-sectional shape of the drain pipe is a U-shape, and the open side of the cross-sectional shape faces the outside of the intake hood.

  As effects of the present invention, the following effects can be obtained.

  In the first aspect, the U-shaped drain pipe can be coated on the entire surface including the inside as compared with, for example, a round pipe drain pipe. In this way, the U-shaped drain pipe does not form an unpainted portion, and therefore the corrosion resistance of the drain pipe can be improved. In addition, since the U-shaped drain pipe can maximize the internal cross-sectional area, it is difficult to clog up dust and the like. In this way, the drainage performance of the drain pipe can be improved. Furthermore, by directing the open side of the drainage pipe having a U-shape toward the outside of the intake hood, rainwater to be drained can be prevented from entering the inside of the intake hood.

Next, embodiments of the invention will be described.
FIG. 1 is a side view showing an overall configuration of an engine power generator according to an embodiment of the present invention, and FIG. 2 is a perspective view of a drain pipe.

  First, the overall structure of the engine power generator 1 according to an embodiment of the present invention will be briefly described with reference to FIG. FIG. 1 shows the interior of the engine power generator 1 with the door and the outer plate removed and the side surfaces of the intake hood 11 and the exhaust hood 16 permeated so as to be easily understood.

  As shown in FIG. 1, the engine power generation apparatus 1 is an apparatus including a package 10 that forms an upper chamber 2 and a lower chamber 3. A generator 31 and an engine 20 are arranged in the lower chamber 3.

The engine 20 includes an intake pipe 21, an exhaust pipe 22, a fuel tank 26, and a radiator 27 in the periphery. The radiator 27 is provided between the exhaust port 17 and the radiator fan 28.
The radiator fan 28 is driven by the engine 20 via a pulley (not shown). The radiator 27 is a device that cools the engine cooling water by the ventilation formed by the radiator fan 28. The ventilation formed by the radiator fan 28 not only cools the radiator 27 but also passes through the inside of the package 10 and cools devices that generate heat such as the engine 20 and the generator 31. Details of ventilation inside the package 10 will be described later.
In addition, the intake pipe 21 is provided with an intake pipe inlet 21 a at a substantially central portion of the lower chamber 3 to intake air.
On the other hand, the exhaust pipe 22 is connected to an exhaust silencer 23 having one end attached to the side surface where the exhaust port 17 is opened. The exhaust silencer 23 is connected to an exhaust tail pipe 24 that protrudes to the outside.

  The generator 31 is a device that generates electric power using the driving of the engine 20 as power and supplies the generated electric power to other devices. A control panel 32 is installed above the generator 31. The control panel 32 houses a controller or the like that operates the engine power generator 1.

  The engine power generator 1 has intake ports 12 and 15 and an exhaust port 17 opened on the side surfaces. The intake ports 12 and 15, the exhaust port 17, and the radiator fan 28 form ventilation that circulates inside the package 10. This ventilation cools the engine 20, the generator 31, and the like that generate heat during operation.

By the way, in the engine power generator 1, the inside of the package 10 has no drainage configuration. This is because, for example, even if there is a fuel leak from the fuel tank 26, the fuel does not flow out of the package 10.
The engine power generator 1 may be installed outdoors. Therefore, for example, when rainwater enters from the intake ports 12 and 15 or the exhaust port 17, rainwater that has entered from the inside of the package 10 is not drained. Rainwater that enters the inside of the package 10 corrodes the equipment. Therefore, the engine power generator 1 has various measures for preventing rainwater intrusion.

For example, the intake hood 11 is provided outside the package 10 in order to prevent rainwater from entering the intake ports 12 and 15. The intake hood 11 covers the intake ports 12 and 15 and opens downward.
With such a configuration, the air taken in from below the intake hood 11 flows upward in the intake hood 11 and is guided to the intake ports 12 and 15. That is, upward ventilation is formed inside the intake hood 11.

  On the other hand, the exhaust hood 16 is provided outside the package 10 in order to prevent rainwater from entering the exhaust port 17. The exhaust hood 16 covers the exhaust port 17 and is opened by providing a shutter 18 above a plane parallel to the exhaust port 17.

Here, the configuration of the drain pipe 35 according to the present invention will be described in detail with reference to FIG. The drain pipe 35 is a drain pipe provided in the rain gutter 19 of the intake hood 11.
As shown in FIG. 2, the rain gutter 19 is provided around the opening of the intake hood 11, that is, on the outer periphery of the lower portion of the intake hood 11. The rain gutter 19 is bent at a substantially right angle at the lower end surface of the opening to extend a predetermined length in the horizontal direction to form a bottom portion 19a, is further bent at a substantially right angle, and protrudes vertically upward. That is, the rain gutter 19 has a concave shape in cross-sectional view. Moreover, the rain gutter 19 forms the drainage hole 19b in the low position of the bottom part 19a.

Similarly, as shown in FIG. 2, the drain pipe 35 is formed in a U shape including a back surface 35 a and a side surface 35 b and extends in the vertical direction in a cross-sectional view. A general-purpose pipe is used for the drain pipe 35. The drain pipe 35 communicates with the drain hole 19 b and is provided vertically downward from the rain gutter 19. Furthermore, as a matter to be noted, the drain pipe 35 is provided with its back surface 35a facing the intake hood 11 side, that is, the ventilation side. In other words, the U-shaped open side faces the outside of the intake hood 11.
By adopting such a configuration, rainwater that covers the outer surface of the intake hood 11 is collected by the rain gutter 19, guided to the drain pipe 35 through the drain hole 19 b, and reliably drained to the outside. In this way, rainwater intrusion due to ventilation inside the intake hood 11 is prevented.

Moreover, the following effects are acquired by setting it as such a structure.
Conventionally, a round pipe is often used as the drain pipe similar to the present embodiment. However, the round pipe cannot be sufficiently painted or rust-proofed. That is, if the general-purpose round pipe is a metal with low corrosion resistance, the inside may corrode. As in this embodiment, the inside can be sufficiently painted by making the cross section U-shaped. That is, the corrosion resistance of the drain pipe 35 can be improved.
Further, since the U-shaped drainage pipe 35 can have the maximum internal cross-sectional area, it is difficult to clog dust and the like and can be easily cleaned even if clogging occurs. In this way, the drainage performance of the drain pipe is improved.
Furthermore, the rain water to be drained can be prevented from entering the inside of the intake hood 11 by directing the back surface of the drain pipe 35 to the inside of the intake hood 11, that is, the open side to the outside of the intake hood 11.

The side view which showed the whole structure of the engine electric power generating apparatus which concerns on the Example of this invention. The perspective view of a drain pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine power generator 10 Package 11 Intake hood 12 Intake port 15 Intake port 17 Exhaust port 19 Gutter 19a Bottom part 19b Drain hole 35 Drain pipe

Claims (1)

It consists of a package that has a ventilation mechanism with air intake and exhaust openings on the side,
An intake hood which covers the intake port outside the package, has an opening below the intake, and has a flange on the outer edge around the lower side of the opening;
Providing at least one drainage hole at the bottom of the trough, and a drain pipe extending downward from the drainage hole;
In an engine power generator having
An engine power generator characterized in that a cross-sectional shape of the drain pipe is a U-shape, and an open side of the cross-sectional shape is directed to the outside of the intake hood.

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