JPH02204630A - Cogeneration set - Google Patents

Abstract

PURPOSE:To improve cooling efficiency by mounting an air duct on each case to of an engine and a generator, inhaling cooling air from the inlet port and cooling the case inside by a ventilating fan, and putting it back in the air duct after cooling, then discharging it from a discharge port. CONSTITUTION:The outside air is inhaled from an inlet port 9b opened to an air duct 9, and cooling air is blown to the inner part of a case 8 by two ventilating fans 2a, 2b. Since there is provided a cooling air guide plate 26, the cooling air is blown deep up to a bottom part of the case 8. The cooling air that collided with the bottom is reached to the other side of the case 8 as cooling a generator 12 and an engine 1 along the bottom. Then, it goes up along a side wall and gets into the air duct 9 from a pass port 9d on a lower surface of the air duct 9. With the above constitution, the inside of the case 8 is fully cooled, and the exhaust of noise is lowered by a meandering passage.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a cooling device for the engine and generator portions of a power generation device that uses an engine to drive a generator and supply electric power.

(B) Prior Art Conventionally, the same applicant has applied for a technology for a power generation device in which an engine and a heat exchanger are arranged in a package arranged in two stages, upper and lower.

For example, Japanese Patent Publication No. 63-248782.

(c) Problems to be solved by the invention However, in the above-mentioned conventional technology, the interior of one package is divided into two stages, the engine and generator are arranged in the lower part, and the exhaust economizer and muffler are arranged in the upper part. It was a one-package type with .

Therefore, since the engine and generator chambers are configured in a part of the case, the cooling air is taken in from the side of the case and discharged to the opposite side, and the cooling air is drawn in from the side of the case and discharged from the opposite side. In terms of placement, it was necessary to provide a space on the side of the case to connect the suction duct and the discharge duct, and the installation location was restricted.

In addition, only one ventilation fan was used to suck in cooling air, so even when the temperature inside the case was low, the ventilation fan had to continue cooling the engine. This resulted in a state of wasteful use.

Furthermore, since the ventilation fan is disposed at an intermediate position in the height of the case with its discharge facing upward, it was necessary to change the discharge direction using a duct to guide the cooling exhaust air in another direction.

The present invention solves these conventional problems.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the configuration for achieving the objects will be explained.

A ventilation fan is placed above the case 8 in which the engine 1 and the generator 12 are placed, and a ventilation duct 9 is placed on the top surface of the case 8 so as to cover the ventilation fan, and the air is cooled through the suction port 9b provided in the ventilation duct 9. The air is sucked in and discharged by a ventilation fan to cool the inside of the case 8. After cooling, it is returned to the ventilation duct 9 through the passage port 9d and then discharged through the discharge port 9a.

Further, a plurality of ventilation fans are arranged, and the number of ventilation fans in operation is automatically controlled depending on the temperature inside the case 8.

Further, a ventilation fan is arranged at the top of the outermost part of the case so as to discharge air downward.

(E) Embodiment The object and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings will be explained.

Figure 1 is a front view with a part of the package of the combined heat and power generator of the present invention removed, and Figure 2 is the engine/generator package B.
and a rear view of the ventilation duct package A, FIG. 3 is a front view with the ventilation duct 9 removed, FIG. 4 is a plan cross-sectional view of the ventilation duct 9, and FIG. 5 is a front view of the case 8. , Figure 6 is a drawing showing the path of cooling air, Figure 7.
FIG. 8 is a perspective view showing the intake air cleaner 28, FIG. 9 is a circuit diagram of the operation control device for the ventilation fans 2a and 2b, and FIG. 10 is a diagram showing the relationship between engine load and power consumption of the ventilation fans.

Referring to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the overall configuration of the combined heat and power generation device will be explained.

A main frame 5 that supports the entire combined heat and power generation device is mounted, and an engine/generator package B and a heat exchanger/silencer package C are mounted on the main frame 5.

In addition, the ventilation duct package A is placed on top of the engine/generator package B, and the three parts of the pan cage constitute the entire combined heat and power generation device.

Three pairs of anti-vibration rubber 19 are interposed between the engine 1 and the generator 12 and the main frame 5.

Then, the ventilation duct package A is placed on top of the engine/generator package B.

The engine/generator package B has a combination of an engine 1 and a three-phase AC brushless generator 12 arranged in the center of a case 8.

In addition, a generator control board 10 is provided on the upper rear surface of the generator 12.
An instrument panel 18 is provided on the upper front side of the generator 12.
is provided.

In addition, as shown in FIG. 2, at the rear of the engine 1,
A water-water heat exchanger 6 is arranged to recover the heat of the cooling water of the engine 1 and use it for heating, etc.

Furthermore, a lubricating oil auxiliary tank 11 is provided in the free space above the generator 12.
is located.

The lubricating oil auxiliary tank 11 is a tank through which the lubricating oil in the oil pan at the bottom of the engine 1 is circulated.

Furthermore, as shown in FIG. 1, a lubricating oil detection tank 7 is arranged on the main frame 5 on the front side of the engine 1, and the amount of lubricating oil circulating in the oil pan and the lubricating oil auxiliary tank 11 is small. It is possible to detect this when it happens.

In addition, a plurality of ventilation fans 2a and 2b are arranged on the ceiling of the right end of the case 8 above the generator 2.

The ventilation fans 2a and 2b open the suction port 9b of the ventilation duct 9.
Cooling air is sucked in from the engine and generator package B, and the cooling air is blown into the case 8 of the engine/generator package B to cool the interior of the engine/generator package B.

After the inside of the case 8 has been cooled, it is blown out into the ventilation duct 9 through the passage port 9d of the ventilation duct 9, and is discharged through the discharge port 9a.

Air inlet 9b and outlet 9 for the ventilation fans 2a and 2b
a is the ventilation duct 9 constituting the ventilation duct package A;
It is set up in

Further, as shown in FIG. 4, an engine intake port 9C is opened in the ventilation duct 9 at a position juxtaposed with the intake port 9b, and an air filter chamber 14 is configured inside the engine intake port 9c. An intake air filter 28 is supported in the chamber 14 by a support metal fitting 29, and the intake air filter 28 and the support metal fitting 29 can be removed as a unit to enable external cleaning.

It is also connected to the intake duct 15 of the engine 1, which sucks the intake air, the air that has passed through the filter 28, into the engine 1.

In addition, since two ventilation fans 2a and 2b are provided at the bottom of the ventilation duct 9, intake guide and sound insulating plates 16 and 17 are installed so that the intake air is evenly sucked into each of the ventilations 1i2a and 2b. It is set up.

The intake guide/sound insulating plates 16 and 17 are connected to the intake port 9b and the discharge port 9.
By providing the inside of a, the discharge port 9a and the suction port 9b
Since the noise path is temporarily closed by the air intake guide/sound insulating plates 16 and 17 midway through without direct communication between the inside of the case 8 and the inside of the case 8, there is an effect of shielding the sound inside the case 8.

Of course, this also has the effect of uniformly distributing intake air toward each of the ventilation fans 2a and 2b, and dispersing exhaust air toward the discharge port 9a.

In addition, instead of installing one large-capacity ventilation fan 2, two ventilation fans 2a and 2b are placed at the front and rear, so that when the temperature inside the case 8 is as low as 1 minute in winter,
By automatically controlling the rotation of either the ventilation fans 2a or 2b, it is possible to prevent excess heat from dissipating.

As shown in FIG. 9, the temperature sensor 30 is connected to the case 8.
is located inside the room to detect a drop in indoor temperature,
The control circuit 31 compares the vertical relationship with the set temperature, and if the temperature inside the case 8 decreases, the relays 33 and 32
is operated to stop one or both of the ventilation fans 2a and 2b.

With this operation stop control, as shown in Fig. 1O,
If both ventilation fans are operated even though the temperature inside the case 8 is low, and if only one ventilation fan is stopped when it is not needed, power consumption can be saved in the shaded area.

Next, referring to FIG. 6, the cooling mechanism of the main part of the present invention will be explained.

Outside air is sucked through the suction port 9b opened in the ventilation duct 9,
The ventilation fans 2a and 2b generate pressure and blow cooling air into the case 8.

At this time, since the ventilation fans 2a and 2b are disposed facing downward at the upper right end of the case 8, the cooling air is blown deeply into the bottom of the case 8 at once. At this time, in order to prevent the cooling air from passing through the upper part of the case 8 through a short-circuit path and escaping into the ventilation duct 9 from the passage port 9d without cooling, the cooling air is suspended from the ceiling of the case 8. This is because the temporary guide 26 is provided vertically.

The cooling air that has collided with the bottom surface changes its direction horizontally, touches the sides of the generator 12 and the engine 1 while moving along the bottom surface, and reaches the other side surface of the case 8 as a cooling air.

The cooling air then rises along the side wall, enters the ventilation duct 9 through the passage opening 9d on the lower surface of the ventilation duct 1-9, and enters the ventilation duct 9 through the outlet 9.
It is discharged into the outside air from a.

As described above, the cooling air discharged from the ventilation TFAs 2a and 2b passes through the inside of the case 8 in a U-shape, so that the engine 1 and generator 12 located on the bottom are sufficiently cooled. .

Next, the configuration of the heat exchanger/silencer package C will be explained.

In the conventional combined heat and power generation device, the heat exchanger/silencer package C was also housed inside the entire package.

However, in the case of a large cogeneration power generation system, if the heat exchanger/silencer pancase C is also placed inside the case 8 of the engine/generator package B-, the package as a whole becomes too large. If the room in which the combined heat and power generation device is installed does not have sufficient capacity, installation may not be possible.

In this embodiment, in order to eliminate such conventional problems, the entire combined heat and power generation device is composed of a ventilation duct package A, an engine/generator package/7 cage B, and a heat exchanger/silencer package C. However, the installation of these three packages can be changed as appropriate depending on the location.

The heat exchanger/silencer package C has an exhaust economizer 4 disposed at the outermost position, and a silencer 3 disposed between the exhaust economizer 4 and the engine/generator package B.

20 is a cooling water expansion tank, and 21 is a starting battery.

(F) Effects of the Invention Since the present invention is constructed as described above, it has the following effects.

With the configuration as claimed in claim (1), the suction port 9b and the discharge port 9a can be arranged on the side surface of the ventilation duct 9, and since the suction port and the discharge port are not opened on the side surface of the case 8, the engine The generator package B can be placed attached to a wall, and the ventilation duct 9 can also be easily opened to the outside air through an extension duct.

In addition, the cooling air blown from the ventilation fans 2a and 2b is
Since it can be distributed evenly throughout the interior, cooling efficiency can be improved.

In addition, the upper parts of the ventilation fans 2a and 2b are covered with ventilation ducts 9,
Since the ventilation duct 9 has a labyrinth-like intake and exhaust passage, the noise of the ventilation fan can no longer be emitted except through the winding passage, resulting in the effect of reducing noise. .

With the configuration as claimed in claim (2), when only one large ventilation fan is installed to blow cooling air as in the conventional technology, the cough ventilation fan can be used even when the temperature inside the case is low. However, in the present invention, when the temperature inside the case 8 drops, the two ventilation fans 2a - Since the cooling air volume can be adjusted by stopping one of the two, fuel efficiency can be improved.

Since the structure is configured as in claim (3), the cooling air blown by the ventilation fans 2a and 2b arranged downward is once blown deep into the case 8, and then the cooling air passes through the bottom of the case 8 and is connected to the generator 12. After cooling the side of the engine 1, it rises along the other inner side, reaches the passage port 9d, and is discharged from the ventilation duct 9, making it possible to sufficiently cool the inside of the case 8. be.

[Brief explanation of the drawing]

Figure 1 is a front view with a part of the package of the combined heat and power generator of the present invention removed, and Figure 2 is the engine/generator package B.
and a rear view of the ventilation duct package A, FIG. 3 is a front view with the ventilation duct 9 removed, FIG. 4 is a plan cross-sectional view of the ventilation duct 9, and FIG. 5 is a front view of the case 8. , Figure 6 is a drawing showing the path of cooling air, Figure 7.
FIG. 8 is a perspective view showing the intake air cleaner 28, FIG. 9 is a circuit diagram of the operation control device for the ventilation fans 2a and 2b, and FIG. 10 is a diagram showing the relationship between engine load and power consumption of the ventilation fans. A... Ventilation duct package B... Engine/generator package C... Heat exchanger/silencer package... Engine 2a, 2b... Ventilation fan 3... Silencer 4... Exhaust economizer 5 Main frame 6 Water-water heat exchanger 8 Case 9 Ventilation duct a b Discharge port Suction port Applicant Yanmar Diesel Co., Ltd. Company agent Patent attorney Hisashi Yano - Department

Claims (3)

[Claims] (1) A ventilation fan is placed at the top of the case where the engine and generator are placed, a ventilation duct is placed on the top of the case to cover the ventilation fan, and cooling air is supplied from the suction port provided in the ventilation duct. A combined heat and power generation device characterized in that the suction is sucked and discharged by a ventilation fan, the inside of the case is cooled, and after cooling, it is returned to the inside of the ventilation duct through the passage port of the ventilation duct, and is discharged from the discharge port. (2) A combined heat and power generation device characterized in that a plurality of ventilation fans according to claim (1) are arranged, and the number of ventilation fans in operation is automatically controlled depending on the temperature inside the case. (3) A combined heat and power generation device characterized in that the ventilation fan according to claim (1) is disposed at the outermost upper part of the case so as to discharge air downward.