JPH04125620U - Cooling structure of soundproof engine generator - Google Patents

Abstract

(57) [Summary] [Purpose] The canopy has a double wall structure, an intake port is provided in the canopy, and the inside of the double wall is used as an intake duct to supply cool air to each room such as the engine room inside the soundproof enclosure. It is an object of the present invention to provide a cooling structure for a soundproof engine generator that prevents noise from scattering in all directions and reducing cooling efficiency by distributing the noise. [Structure] A soundproof engine generator in which an engine and a generator connected to the engine are housed in a soundproof case made of a sound-absorbing material pasted.The canopy has a double wall structure and the inside is an intake duct. The intake duct is divided into two by the top-opening case, and the part of the top-opening case other than the part with the hanging metal fittings is covered with a top plate, and outside air is introduced into the top-opening case from the part where the top plate does not have, and then the outside air is introduced into the top-opening case from the side wall of the top-opening case. After the air is introduced into the intake duct through an inlet having an inlet, the air is distributed from the inside of the intake duct to required locations in the engine room and the generator room.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a cooling structure for a soundproof engine generator used as a power source for outdoor work. In particular, efforts are being made to improve the efficiency of cooling the engine, which is the power source for the generator, and to reduce noise to the outside. The present invention relates to a cooling structure for a soundproof engine generator that can eliminate leakage.

0002

[Conventional technology]

Conventional cooling structures of this type are used for cooling engines such as engines and generators connected to the engines. The entire device is housed in a soundproof enclosure, and the cooling air intake and exhaust ports are introduced into the soundproof enclosure. A mouth is provided on the side or bottom of the soundproof case to cool the generator or engine inside the soundproof case. are doing. Moreover, mechanical noise generated from the engine and generator leaks from inside the soundproof enclosure to the outside. In order to avoid The door has a double-walled structure with an empty room, and the empty room inside the double wall has a maze-like curved structure. The mechanical sound is attenuated by the curved sound path. Or the above intake Open the mouth or exhaust port on the bottom of the soundproof casing near the moving wheel, and move the moving wheel as described above. There are some that function as baffles against mechanical noise.

0003

[Problem that the idea aims to solve]

However, with the above-mentioned conventional device, if intake and exhaust ports are provided on the side of the soundproof case, especially one In the case of large engine generators of 00KVA or more, the intake and exhaust ports are near the height of the worker's ears. Due to the location of the When operating the machine, the noise can be harsh on the ears, and the noise can also be directly heard by passersby. Not only will this cause discomfort, but the noise will scatter in all directions from the sides of the soundproof enclosure and may cause harm to surrounding residents. It also causes pollution in residential areas. Air intake to prevent noise pollution Some have a maze-like structure around the mouth and exhaust port, but the engine inside the soundproof housing and This not only reduces the cooling efficiency of the generator, but also increases the size and weight of the entire device. There is. In particular, if the intake port is installed on the bottom of the soundproof housing, the cooling of the engine oil pan However, it is not recommended to use external cold air for engine air cleaners. It is not easy to introduce it directly, and this poses a problem in terms of engine efficiency.

0004 Therefore, in view of the above circumstances, this invention has a double wall structure for the canopy and a An intake port is provided, and the inside of the double wall is used as an intake duct to connect the engine room, etc. inside the soundproof enclosure. By distributing cool air to each room, noise is scattered in all directions and cooling efficiency is reduced. It is an object of the present invention to provide a cooling structure for a soundproof engine generator that prevents noise.

[0005]

[Means and actions to solve the problem]

The present invention was made to achieve the above object, and is a soundproofing device made by pasting sound-absorbing material. A soundproof engine that houses an engine and a generator connected to the engine in a housing. In a generator, the canopy has a double wall structure and the inside is an intake duct. Divide the board into two by the top-opening case, and cover the part of the top-opening case other than the part with the hanging metal fittings with the top plate. Close the lid, introduce outside air into the top-opening case from the part where the top plate does not have, and then introduce the outside air into the top-opening case. After introducing the air into the intake duct from the inlet on the side wall, the engine is introduced from inside the intake duct. It is designed to be distributed to required locations in the gin room and generator room.

[0006]

【Example】

An example of the cooling structure of the soundproof engine generator according to the present invention is shown below based on the drawings. I will explain further. In FIG. 1, reference numeral 1 denotes a soundproof casing in which a sound absorbing material is adhered to a steel plate. The interior of the soundproof enclosure 1 is partitioned by partition walls 2 and 3 along the longitudinal direction, that is, in a direction parallel to the canopy 4. Each room is defined as a generator room 5, an engine room 6, and an exhaust duct 7. In generator room 5 Of course, the generator 8 can be stored in the engine compartment 6, and the engine 9 can be stored in the engine compartment 6. be. A generator 8 and an engine 9 are installed on a base 10 and are connected to each other. As a result, the generator 8 is driven by the engine 9. Generator 8 is Cooling air inside the generator room 5 is introduced from the inlet 12 by the internal cooling fan 11, and the inside After cooling the engine, it is discharged from an exhaust port 13 into the engine compartment 6. workman A radiator 15 equipped with a radiator fan 14 of the engine 9 is installed in the opening of the partition wall 3. to be placed. Furthermore, the muffler 16 of the engine 9 is housed in the exhaust duct 7. There is. A fuel tank 17 is disposed within the soundproof casing 1 below the exhaust duct 7. the above As shown in FIGS. 1 and 2, the canopy 4 has a vacant space except for the exhaust duct 7. It is formed with a double-walled structure, and is located in the center of the soundproof enclosure 1. A top opening casing 18 is formed and divided into left and right halves in FIG. Top opening case Bar-shaped hanging fittings 19 are attached to the front and rear ends and the center portion of 18. Hanging bracket 1 The upper surface of the upper surface open case 18 except for the portion where 9 is attached is covered with a top plate 20. Top plate The end wall on the side adjacent to the hanging fitting 19 of 20 is spaced apart from the bottom wall of the top opening casing 18. It is folded inward at the same height. Therefore, the end of the top plate 20 and the top opening casing 18 There is a gap between the two, and the gap is used as an intake port 21 for introducing outside air. Top opening The double wall of the canopy 4 is located on the side wall located in the center between the hanging fittings 19 of the housing 18. An inlet 22 is opened which communicates with the cavity of the structure. Sky with double wall structure of canopy 4 The chambers are provided as intake ducts 23a and 23b. In addition, the inlet 22 prevents rainwater etc. from entering. It is convenient to form it in the form of a louver. Divided into left and right by top opening casing 18 One of the intake ducts 23a supplies air in the engine compartment 6 via the introduction duct 24. - Connected to the cleaner 25 and also connected to the control box 27 via the introduction duct 26 At the same time, it is communicated with the generator room 5 through an opening 28. The other intake duct 23 b is communicated with the engine compartment 6 through an opening 29. Cooling air is provided at the rim of the opening 29. A wind direction plate 30 is attached to adjust the direction of air flow.

[0007] On the other hand, as shown in FIG. 31 are arranged at appropriate locations. Therefore, the air intake from the intake port 21 and the introduction port 22 is The outside air introduced into the air duct 23a is passed through the air intake duct 23a by the baffle plate 31. It progresses in a meandering manner and is sent into the generator room 5 and engine room 6. Two Therefore, for mechanical noise generated from the generator 8 and engine 9, the intake duct 23a This creates a curved sound path, which prevents noise from leaking to the outside. The other intake duct 23 It is also possible to arrange a baffle plate at b.

[0008] In addition to using a hose, the introduction duct 24 may be formed using a partition wall. You can also Moreover, the top opening casing 18 is located at the center of the base 10 at the front and rear ends. It is installed between the central supports 33 by bolts, welding, etc., and the entire device is secured by the hanging fittings 19. Although it has mechanical strength when the body is suspended, it is not limited to this, and various types of assembly are possible. The formula can be adopted. A louver-type exhaust port 34 is provided in the canopy above the exhaust duct 7. is left open.

[0009] Next, let us explain the operation of the cooling structure of the soundproof engine generator with the above configuration. , first, when the engine 9 is started, the radiator fan 14 and the built-in cooling unit of the generator 8 are turned on. The cooling fan 11 rotates. When the radiator fan 14 and cooling fan 11 rotate Then, due to these suction effects, the outside air is drawn to the intake port 21 as shown by the arrows shown in FIGS. 1 to 3. from the top plate 20 into the top opening casing 18 covered with the top plate 20, and further through the introduction port. 22 into the intake ducts 23a, 23b. Introduced into the intake duct 23a The cooled air enters the control box 27 through the introduction duct 26 and enters the control box 27. After cooling the various control devices in the box 27, it is discharged into the generator room 5. Even more sucking After the cooling air in the air duct 23a is introduced into the generator room 5 through the opening 28, After being fed into the generator 8 through the inlet 12 and cooling the inside thereof, it is discharged from the exhaust port 13. It is discharged into the engine compartment 6. Also, the cooling air in the intake duct 23a is transferred to the introduction duct 2. The air is supplied to the air cleaner 25 through the air cleaner 4, and is used for combustion in the engine 9. on the other hand The cooling air introduced into the intake duct 23b is sent to the engine compartment 9 through the opening 29. At this time, the wind direction is adjusted using the wind direction plate 30 so that the cooling air is directed toward the engine 9. It will be arranged. The cooling air sent into the engine compartment 9 is from the exhaust port 13 of the generator 8. Together with the discharged air, it cools the outer surface of the engine 9 and further cools the radiator 15. After that, it is introduced into the exhaust duct 7. The air after cooling in the exhaust duct 7 is further passed through a muff. After cooling the muffler 16, the combustion exhaust gas from the muffler 16 is discharged from the exhaust port 34. is released to the outside.

0010

[Effect of the idea]

As described above, according to the cooling structure of the soundproof engine generator according to the present invention, a large amount of Enables a large opening to introduce cooling air into the engine compartment that requires cooling air. Of course, even if the opening is made large, the outside air is once introduced into the top opening casing, Furthermore, the so-called curved air is introduced into the engine room or generator room through the intake duct installed in the canopy. The sound path prevents engine noise from leaking outside. Also, the intake duct? Cooling air can be distributed directly to the areas where cooling air is needed, especially in air cleaners. When supplied directly to the tank, the combustion efficiency is better than when introducing thermally expanded hot air. It is. In addition, since outside air is taken in from the side wall of the top-opening case to the canopy's intake duct, rainwater is There is no direct intrusion into the engine compartment etc. The intake vent that takes in outside air is located in the canopy. Therefore, even if the soundproof enclosure is placed close to a wall, such as in the corner of a truck bed, It does not cause any hindrance to the intake of outside air, and is necessary from the intake duct in the canopy. Since the cooling air is distributed to important points, cooling air can be directly supplied to the necessary points. It is convenient to be able to distribute it as freely as possible and rely on it.

[Brief explanation of drawings]

FIG. 1 is a structural diagram showing an embodiment of a cooling structure for a soundproof engine generator according to the present invention.

FIG. 2 is a perspective view of a main part of the top-opening case.

FIG. 3 is a plan view showing the main structure of the intake duct.

[Explanation of symbols]

1 Soundproof enclosure 4 Canopy 5 Generator room 6 Engine room 7 Exhaust duct 8 Generator 9 Engine 16 Muffler 18 Top opening case 19 Hanging bracket 20 Top plate 21 Intake port 22 Inlet 23a, 23b intake duct

Claims (1)

[Scope of utility model registration request] Claim 1: A soundproof engine generator in which an engine and a generator connected to the engine are housed in a soundproof case made of a sound-absorbing material pasted; It is divided into three rooms: the aircraft room, the engine room, and the exhaust duct in which the muffler is housed, and is connected sequentially from the generator room to the engine room to the exhaust duct, and the canopy part excluding the exhaust duct part is the intake duct. In addition, the canopy is divided into two by a top-opening case with a hanging fitting inside, and the part of the top of the top-opening case other than the part where the hanging fitting is attached is attached to the top plate. The opening of the top-opening case that is covered with a top plate and has no top plate is an intake port,
An inlet that communicates with the empty chamber as the intake duct is formed in the side wall of the upper opening casing, and a communication port that connects the empty chamber as the intake duct with the generator room and the engine room, respectively, is formed in the double wall of the canopy. A cooling structure for a soundproof engine generator characterized by being formed on a wall.