JPH1030438A - Cooling system of engine for generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remarkably improve silence property by disposing a wind blowing duct opened to a wind blowing tank of an air cooler in one side and an engine chamber in the other side to penetrate a shielding plate of a sound insulating case and cooling air in the engine chamber disposing a blast fan by the air cooler. SOLUTION: A sound insulating case 11 is divided into an engine chamber and cooling chamber 15 by a shielding plate 17. Air heated with hart generated from an engine 19 disposed in the engine chamber 13 is blown into a wind absorbing tank 25a of an air cooler 25 disposed in the cooling chamber 15 through a wind absorbing duct 31 by a blast fan 3 disposed in the engine chamber 13. The air, while passing by a core part 25c of the air cooler 25, flows into a wind exhausting tank 25b, exchanges heat with the atmosphere sucked from a ventilating port 15a by a cooling fan 29 disposed in the cooling chamber 15 to be cooled, and thereafter exhausted through a wind exhausting duct to the engine chamber 13, so that the air in the engine chamber 13 is circulated to cool the engine 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator cooling system for cooling an engine disposed in a generator.

[0002]

2. Description of the Related Art Generally, mobile power generators are widely used in construction sites without permanent power supply facilities, concert venues specially constructed outdoors, or disaster-hit areas where power supply facilities have been destroyed by disasters such as earthquakes. In emergency power supply facilities such as hospitals and cogeneration power generation facilities such as factories, stationary generators are installed.

[0003] Conventionally, in this type of generator, power is generated by driving a generator by the driving force of an engine. FIG. 9 shows a generator of this type, in which an engine 2 is disposed inside a soundproof case 1, and a generator 3 driven by a rotating shaft 2 a of the engine 2 is connected to the engine 2. Have been.

A cooling fan 4 is arranged on a rotating shaft 2 a of the engine 2 opposite to the generator 3, and a radiator 5 is arranged to face the cooling fan 4. An intake port 1 a is formed on a side surface of the soundproof case 1 on the generator 3 side, and a radiator 5 of the soundproof case 1 is formed.
An exhaust port 1b is formed on the upper surface on the side. Inlet 1
A partition wall 6 is disposed in a for restricting the inflow direction of air so that the inside and outside of the soundproof case 1 are not directly opened.

In the above-described generator, the cooling fan 4 disposed on the rotating shaft 2a of the engine 2 is driven by the engine 2, and the air taken in from the intake port 1a
After passing around the generator 3 and the radiator 5, it is discharged from the exhaust port 1b together with the hot air in the soundproof case 1, and the engine 2 is cooled. In order to prevent the sound generated from the engine 2 from leaking out of the soundproof case 1,
A partition wall 6 is arranged in the intake port 1a so as not to directly open the inside and the outside of the soundproof case 1, so that the noise of the generator can be reduced.

[0006]

However, in the above-described generator, air is sucked from the intake port 1a whose flow direction is regulated by the partition 6 so as not to open directly to the outside. The sound generated by the engine 2 from the intake port 1a that communicates between the
There is a problem that noise leaks around the generator and generates noise around the generator.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. An engine can be arranged in a closed soundproof case, and the quietness of a generator can be greatly improved. It is an object of the present invention to provide a generator cooling device for a generator.

[0008]

According to a first aspect of the present invention, there is provided a cooling system for an engine for a generator, wherein the soundproof case is separated from an engine room and a cooling room by a shielding plate, and a ventilation opening is formed in the cooling room; An engine arranged in an engine room, a generator arranged in the engine room and driven by the engine, and an air cooler arranged in the cooling room and having a core formed between an air inlet tank and an air outlet tank A cooling fan arranged in the cooling chamber for blowing outside air to the core portion of the air cooler; and a cooling fan arranged so as to penetrate the shielding plate of the soundproof case, and having one side of the air inlet of the air cooler. An air inlet duct opened to the tank and the other side opened to the engine room, and disposed through the shielding plate of the soundproof case, and one side is opened to the air outlet tank of the air cooler and the other side is opened. The above d And Kazede duct is open to the gin chamber,
And a blower fan arranged in the engine room to blow air in the engine room to the air inlet duct.

According to a second aspect of the present invention, in the cooling system for a generator engine according to the first aspect, the blower fan is an electric fan. In the cooling device for a generator engine according to claim 3, in the cooling device for a generator engine according to claim 1, the blower fan is disposed on a rotating shaft between the engine and the generator. It is characterized by being driven by.

According to a fourth aspect of the present invention, in the cooling device for a generator engine according to the first aspect, the cooling fan allows the rotating shaft of the engine to penetrate the shielding plate. It is arranged at the tip of the rotating shaft extending to the cooling chamber, and is driven by the engine. According to a fifth aspect of the present invention, there is provided the cooling system for a generator engine according to any one of the first to fourth aspects.
Item 3. The cooling device for a generator engine according to Item 1, wherein the engine is a water-cooled engine, and a radiator is arranged to face the air cooler in the cooling chamber.

(Function) In the cooling device for a generator engine according to the first aspect, the shield plate is heated by heat generated from the engine disposed in the engine room of the soundproof case separated from the engine room and the cooling room. The blown air is blown by a blower fan arranged in the engine room through an air inlet duct to an air inlet tank of an air cooler arranged in the cooling room.

While passing through the core of the air cooler and flowing into the air outlet tank, the cooling fan disposed in the cooling chamber exchanges heat with the outside air taken in from the ventilation port and is cooled. The engine is discharged through the outlet duct into the engine room, and the air in the engine room is circulated to cool the engine. In the cooling device for a generator engine according to the second aspect, the air in the engine room is circulated by the electric fan.

According to a third aspect of the present invention, the air in the engine room is recirculated by a blower fan which is disposed on a rotating shaft between the engine and the generator and driven by the engine. In the cooling device for a generator engine according to the fourth aspect, the outside air is sucked from the ventilation port by the cooling fan disposed at the tip of the rotation shaft of the engine that extends through the shielding plate and extends into the cooling chamber.

In the cooling device for a generator engine according to a fifth aspect of the present invention, the radiator disposed opposite the air cooler in the cooling chamber cools the engine coolant.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show a first embodiment (corresponding to claims 1 and 5) of a cooling system for a generator engine according to the present invention. In the drawings, reference numeral 11 denotes a soundproof case. Is shown. The soundproof case 11 is provided with a shielding plate 17 for separating the inside of the soundproof case 11 between the engine room 13 and the cooling room 15.

On the side and upper surfaces of the cooling chamber 15, ventilation holes 15 are provided.
a and 15b are formed. A water-cooled engine 19 is arranged in the engine room 13 (corresponding to claim 5). On the left side of the engine 19, a generator 23 driven by a rotating shaft 21 of the engine 19 is arranged.

A radiator 24 is disposed in the cooling chamber 15 so as to face the ventilation port 15a (corresponding to claim 5).
An air cooler 25 is arranged opposite to the radiator 24. The air cooler 25 has a ventilation tank 25a.
A core portion 25c is formed between the air outlet tank 25b and the air outlet tank 25b.

In the air cooler 25, a cooling fan 29 composed of an electric fan is arranged to face the air cooler 25. Above the shielding plate 17 of the soundproof case 11, an air inlet duct 3 that connects the air inlet tank 25 a of the air cooler 25 and the engine room 13 is provided.
1 are arranged through it. On the other hand, below the shielding plate 17 of the soundproof case 11, the air outlet tank 2 of the air cooler 25 is provided.
An air outlet duct 33 that communicates with the engine room 13 is provided penetrating therethrough.

The opening 33a at the tip of the air outlet duct 33 is
It is located near the generator 23. Engine 1
A blower fan 35 composed of a sirocco fan is arranged on the rotating shaft 21 on the opposite side of the generator 23 of No. 9.
A fan shroud 37 is arranged on the outer periphery of the blower fan 35, and the fan shroud 37 has an open air duct 31.

In the cooling device for a generator engine according to the first embodiment, the engine compartment 1 of the soundproof case 11 separated by the shielding plate 17 between the engine compartment 13 and the cooling compartment 15 is provided.
Air heated by heat generated from the engine 19 disposed in the engine 3 (illustrated by white arrows) is disposed in the cooling chamber 15 via the air inlet duct 31 by the blower fan 35 disposed in the engine chamber 13. Is blown to the air inlet tank 25 a of the air cooler 25.

Then, while passing through the core portion 25c of the air cooler 25 and flowing into the air outlet tank 25b, the cooling chamber 15
After being cooled by heat exchange with outside air (illustrated by black arrows) drawn in from the ventilation opening 15a by the cooling fan 29 disposed in the engine room 13, the air is discharged into the engine room 13 through the air outlet duct 33, and The engine 19 is cooled by circulating the air.

In the cooling device for a generator engine configured as described above, the engine room 1 of the soundproof case 11 separated by the shield plate 17 between the engine room 13 and the cooling room 15 is provided.
3 and the core portion 25c between the air inlet tank 25a and the air outlet tank 25b in the cooling chamber 15.
Is formed, and the right side is opened to the air inlet tank 25a of the air cooler 25 and the left side is passed through the air inlet duct 31 opened to the engine room 13 through the shielding plate 17 of the soundproof case 11. Further, an air outlet duct 33 whose right side is opened to the air outlet tank 25b of the air cooler 25 and whose left side is opened to the engine room 13 is arranged so as to penetrate the shielding plate 17 of the soundproof case 11, and A blower fan 35 for blowing air in the engine room 13 into the inlet duct 31 is disposed in the engine room 13, and the air in the engine room 13 is cooled by the cooling room 15.
The engine 19 can be arranged in the sealed soundproof case 11, and the quietness of the generator can be greatly improved as compared with the conventional case.

FIGS. 3 and 4 show a second embodiment of a cooling system for a generator engine according to the present invention.
In the figure, reference numeral 11 denotes a soundproof case formed in the same manner as in the first embodiment. Above the shield plate 17 of the soundproof case 11, the air tank 25 a of the air cooler 25 and the engine room 1
3 is provided so as to penetrate therethrough.

On the other hand, below the shielding plate 17 of the soundproof case 11, an air outlet duct 42 that communicates between the air outlet tank 25b of the air cooler 25 and the engine room 13 is disposed so as to penetrate therethrough. The opening 42 a at the tip of the air outlet duct 42 is located near the engine 19. Above the engine 19, two electric sirocco fans 43 are arranged (corresponding to claim 2).

A fan shroud 45 is arranged on the outer periphery of the electric sirocco fan 43, and an air inlet duct 41 is opened in the fan shroud 45. The other parts are configured in the same manner as in the first embodiment. Therefore, the same parts are denoted by the same reference numerals, and detailed description will be omitted. In the cooling device for a generator engine according to the second embodiment, the electric sirocco fan 43 circulates the air in the engine room 13.

In the cooling device for a generator engine configured as described above, substantially the same effects as those of the first embodiment can be obtained. In the second embodiment, however, the electric sirocco fan 43 Since the air in the engine room 13 is circulated, the location of the electric sirocco fan 43 is not limited, and the location of the electric sirocco fan 43 can be designed with a high degree of freedom.

FIGS. 5 and 6 show a third embodiment of a cooling system for a generator engine according to the present invention.
In the figure, reference numeral 11 denotes a soundproof case formed in the same manner as in the first embodiment. Above the shield plate 17 of the soundproof case 11, the air tank 25 a of the air cooler 25 and the engine room 1
The air inlet duct 47 that communicates with the air passage 3 is disposed so as to penetrate.

On the other hand, below the shielding plate 17 of the soundproof case 11, a ventilation duct 49 for communicating the ventilation chamber 25b of the air cooler 25 with the engine room 13 is provided so as to penetrate therethrough. The opening 49a at the tip of the air outlet duct 49 is located near a generator 52 to be described later.

On the left side of the engine 19, a generator 52 driven by a rotating shaft 51 of the engine 19 is arranged. A rotating shaft 51 between the engine 19 and the generator 52 has a blower fan 53 composed of a sirocco fan.
Is arranged (corresponding to claim 3). Blower fan 53
A fan shroud 55 is arranged on the outer circumference of
An air inlet duct 47 is opened in the fan shroud 55.

The other parts are configured in the same manner as in the first embodiment, and the same parts are denoted by the same reference numerals and detailed description thereof will be omitted. In the cooling device for a generator engine according to the third embodiment, the air in the engine chamber 13 is recirculated by a blower fan 53 that is disposed on the rotating shaft 51 between the engine 19 and the generator 52 and driven by the engine 19. Is done.

In the cooling device for a generator engine configured as described above, substantially the same effects as those of the first embodiment can be obtained. However, in the third embodiment, the engine 19 and the generator 52 are provided. Since the blower fan 53 is disposed on the rotating shaft 51 between the air conditioner and the air conditioner, the air heated by the heat generated from the generator 52 can be reliably recirculated.

FIGS. 7 and 8 show a fourth embodiment of a cooling system for a generator engine according to the present invention.
In the figure, reference numeral 57 denotes a soundproof case. This soundproof case 57
The engine room 59 and the cooling room 61
And a shielding plate 63 that is separated from the other.

On the upper surface of the cooling chamber 61, ventilation openings 61a, 6
1b is formed. A water-cooled engine 64 is disposed in the engine room 59 (corresponding to claim 5). On the left side of the engine 64, a rotating shaft 65 of the engine 64 is provided.
Is disposed.

A radiator 69 is disposed below the ventilation port 61a of the cooling chamber 61 (corresponding to claim 5). An air cooler 71 is arranged opposite to the radiator 69. In the air cooler 71, a core portion 71c is formed between an air inlet tank 71a and an air outlet tank 71b.

A cooling fan 73 composed of a sirocco fan is arranged to face the air cooler 71. A first fan shroud 75 is arranged on the outer periphery of the cooling fan 73. This fan shroud 75 and vent 61
A ventilation duct 77 is arranged between the air duct b.

On the upper part of the shielding plate 63 of the soundproof case 57,
An air inlet duct 79 that communicates the air inlet tank 71 a of the air cooler 71 with the engine room 59 is provided so as to penetrate therethrough.
On the other hand, below the shielding plate 63 of the soundproof case 57, an air outlet duct 81 that communicates between the air outlet tank 71b of the air cooler 71 and the engine room 59 is disposed so as to pass therethrough. The opening 81 a at the tip of the air outlet duct 81 is located near the generator 67.

On the rotating shaft 65 of the engine 64 opposite to the generator 67, a blower fan 83 composed of a sirocco fan is arranged. A second fan shroud 85 is arranged on the outer periphery of the blower fan 83.
An air inlet duct 79 is opened in the fan shroud 85. The rotation shaft 65 of the engine 64 extends through the shielding plate 63 to the cooling chamber 61.

At the tip of the rotating shaft 65, a cooling fan 7
3 is fixed (corresponding to claim 4). In the cooling device for a generator engine according to the fourth embodiment, the shielding plate 63
Accordingly, air heated by heat generated from the engine 64 disposed in the engine room 59 of the soundproof case 57 separated from the engine room 59 and the cooling room 61 (shown by a white arrow) is disposed in the engine room 59. The air is blown by a blower fan 83 to a blow-in tank 71 a of an air cooler 71 arranged in the cooling chamber 61 via a blow-in duct 79.

Then, while passing through the core portion 71c of the air cooler 71 and flowing into the air outlet tank 71b, the cooling chamber 61
After being cooled by heat exchange with outside air (illustrated by black arrows) drawn in from the ventilation opening 61 a by the cooling fan 73 disposed in the engine room 59, the cooling air is discharged to the engine room 59 through the air outlet duct 81, and The engine 64 is cooled by circulating the air.

In the cooling device for a generator engine configured as described above, substantially the same effect as that of the first embodiment can be obtained. Since the tip of the rotation shaft 65 of the engine 64 extends to the cooling chamber 61 and the cooling fan 73 is arranged at the tip of the rotation shaft 65, it is necessary to arrange a motor or the like for driving the cooling fan 73. Therefore, the number of components can be reduced, and the assembling process and the component management process can be reliably reduced.

In the first to fourth embodiments, the air cooler 2 is provided downstream of the radiators 24 and 69.
Although an example in which 5, 71 are arranged has been described, the present invention is not limited to this embodiment, and an air cooler may be arranged upstream of the radiator. In the above-described first to fourth embodiments, the engine compartments 13 and 59
Although the example in which the water-cooled engines 19 and 63 are arranged has been described, the present invention is not limited to such an embodiment, and an air-cooled engine can also be arranged.

[0043]

As described above, in the cooling system for a generator engine according to the first aspect, the engine is disposed in the engine room of the soundproof case separated by the shielding plate between the engine room and the cooling room, and the cooling is performed. Place an air cooler in which the core is formed between the air inlet tank and the air outlet tank in the chamber,
One side is opened to the air inlet tank of the air cooler, and the other side is opened to the engine room through the shield plate of the soundproof case, and one side is opened to the air outlet tank of the air cooler. An air outlet duct opened to the other side and opened to the engine room is placed through the shielding plate of the soundproof case, and a blower fan that blows air in the engine room to the air inlet duct is placed in the engine room, The air in the room is cooled by an air cooler placed in the cooling room, so the engine can be placed in a closed soundproof case, and the quietness of the generator is greatly improved compared to the past. Can be.

In the cooling device for an engine for a generator according to the second aspect, the air in the engine room is circulated by the electric fan, so that the location of the blower fan is not limited, so that the arrangement is highly flexible. You can design a place. In the cooling device for a generator engine according to the third aspect, since the blower fan is disposed on the rotating shaft between the engine and the generator, the air heated by the heat generated from the generator can be reliably recirculated.

Further, since the blower fan is driven by the rotating shaft of the engine, the air in the engine room can be reliably recirculated by the large driving force of the engine.
In the cooling device for a generator engine according to claim 4, the tip of the rotating shaft of the engine extends through the shielding plate and extends into the cooling chamber, and the cooling fan is disposed at the tip of the rotating shaft. Therefore, there is no need to dispose a motor or the like for driving the motor, so that the number of components can be reduced, and the assembling process and the component management process can be reliably reduced.

In the cooling device for a generator engine according to the fifth aspect, since the radiator is disposed opposite the air cooler in the cooling chamber, the outside air is blown to the radiator by the cooling fan that blows the outside air to the air cooler. The cooling chamber of the soundproof case can be made small.

[Brief description of the drawings]

FIG. 1 is a top view showing a main part of a first embodiment of a cooling device for a generator engine of the present invention.

FIG. 2 is a side view showing a main part of the cooling device for the generator engine of FIG. 1;

FIG. 3 is a top view showing a main part of a second embodiment of the cooling device for a generator engine of the present invention.

FIG. 4 is a side view showing a main part of the cooling device for the generator engine of FIG. 3;

FIG. 5 is a top view showing a main part of a third embodiment of a cooling device for a generator engine according to the present invention.

FIG. 6 is a side view showing a main part of the cooling device of the generator engine of FIG. 5;

FIG. 7 is a side view showing a main part of a fourth embodiment of a cooling device for a generator engine according to the present invention.

FIG. 8 is a side view showing a main part of the cooling device for the generator engine of FIG. 7;

FIG. 9 is a side view showing a conventional cooling device for a generator engine.

[Explanation of symbols]

 11,57 soundproof case, 13,59 engine room 15,61 cooling room 15a, 15b, 61a, 61b ventilation port 17,63 shielding plate 19,64 engine 21,51,65 rotating shaft 23,67 generator 24,69 radiator 25 , 71 Air cooler 25a, 71a Inlet tank 25b, 71b Outlet tank 25c, 71c Core unit 29, 73 Cooling fan 31, 41, 47, 79 Inlet duct 33, 42, 49, 81 Outlet duct 35, 53 , 83 Blower fan 43 Electric sirocco fan

Claims (5)

[Claims] The cooling chamber (15, 61) is separated by a shielding plate (17, 63) into an engine chamber (13, 59) and a cooling chamber (15, 61).
1a, 61b) are formed in a soundproof case (11, 57).
An engine (19, 64) disposed in the engine room (13, 59); and a generator (23, 24) disposed in the engine room (13, 59) and driven by the engine (19, 64).
67), and an air-intake tank (25) disposed in the cooling chamber (15, 61).
a, 71a) and an air cooler (2) in which a core portion (25c, 71c) is formed between the air discharge tank (25b, 71b).
A cooling fan (29, 73) disposed in the cooling chamber (15, 61) and blowing outside air to the core portion (25c, 71c) of the air cooler (25, 71); The shielding plate (17, 6) of the soundproof case (11, 57).
3), one side of the air cooler (2)
(71, 41), and the other side is opened to the engine compartment (13, 59), and the soundproof case ( 11, 57) of the shielding plate (17, 6).
3), one side of the air cooler (2)
5, 71), which are open to the air discharge tanks (25b, 71b) and open on the other side to the engine chambers (13, 59), and the engine chambers (33, 42, 49, 81). 13, 59) and the engine room (1) is provided in the ventilation duct (31, 41, 47, 79).
Blower fan (35, 4) for blowing the air in
3, 53, 83), and a cooling device for a generator engine. 2. The cooling device for a generator engine according to claim 1, wherein the blower fan (35, 43, 53, 83) is an electric fan (43). Cooling system. 3. The cooling device for a generator engine according to claim 1, wherein the blower fan (53) is disposed on a rotating shaft (51) between the engine (19) and the generator (23). An engine cooling device for a generator, which is driven by the engine (19). 4. The cooling device for a generator engine according to claim 1, wherein the cooling fan (73) penetrates the rotary shaft (65) of the engine (64) through the shielding plate (63), A cooling device for an engine for a generator, which is disposed at a tip of the rotating shaft (65) extending to the cooling chamber (61) and is driven by the engine (64). 5. The cooling device for a generator engine according to claim 1, wherein the engine is a water-cooled engine, and the cooling chamber is configured to be a water-cooled engine. ) The air cooler (2)
A radiator (24, 69) is arranged to face the radiator (24, 69).