KR20090051079A - Sound-proof engine generator - Google Patents

Abstract

It has a sufficient cooling effect and also provides a small, lightweight, soundproof generator. On the same axis from the first inlet port side, the inverter 19, the engine fan 32, the power generator 33, the engine 34, the recoil fan 61, and the recoil starter 63 are arranged in this order. The first cooling wind passage for cooling the inverter 19, the power generating body 33, and the engine 34 by the cooling wind sucked by the intake port 21 from the inlet port 21, and the recoil fan 61 is the inlet port 21b1. And second cooling the space surrounded by the inverter storage box 20, the engine fan cover 31, the engine cover 36, the muffler cover 52 and the soundproof case by the cooling air sucked from the inlet 21b2; A third cooling wind passage is formed, the cooling winds passing through the first cooling wind passage, the second and third cooling wind passages are joined, and the muffler is cooled, and then discharged from the exhaust port.

Engine Generator, Inverter, Engine Fan, Generator, Recoil Fan, Recoil Starter

Description

Soundproof Engine Generator {SOUND-PROOF ENGINE GENERATOR}

The present invention relates to a small, lightweight, soundproof engine generator covered with a soundproof case.

An engine generator incorporating a small engine and a power generator driven by the engine is highly portable and suitable for use in urban areas. When the engine generator is used in urban areas, especially at night, the entire apparatus should be covered with a soundproof case in order to minimize driving noise in consideration of the surrounding environment. In addition, in order to suppress leakage of driving sound, it is necessary to make the opening area of a sound insulation case as small as possible. At the same time, in such an engine generator, since an air-cooled engine without cooling water is used, securing the cooling wind in the soundproof case becomes more important.

However, if the opening area of the soundproof case is made small, the intake amount and the exhaust amount of the cooling wind into the soundproof case are reduced, so that the engine cannot overheat and operate. On the contrary, when opening area is enlarged, a sound insulation effect will fall. Moreover, when the soundproof case is made small, the ventilation path inside becomes narrow, and air permeability is bad and a cooling effect cannot be desired. For this reason, the reality that the convenience, light weight, and size reduction which are required for a soundproof generator are difficult to meet.

The invention disclosed in Japanese Patent Application Laid-Open No. 11-200861 discloses an engine and a power generating body in a soundproof case provided with an air intake for intake of outside air. It arranges in order of a recoil starter, an engine fan, a power generating body, an engine, and a muffler, surrounds them with a cylindrical cover, and discharges cooling air from the exhaust port provided in the soundproofing case. The intake port is provided on the side of the soundproof case in contact with the side of the inverter unit.

However, in the invention disclosed in Japanese Patent Application Laid-open No. Hei 11-200861, since the recoil starter is disposed in front of the engine fan, this becomes an intake resistance, which prevents effective cooling of the power generator and the engine.

In addition, the inverter unit and the fuel tank are provided outside the cylindrical cover, and the outside air from the intake port passes through the side surface of the inverter unit and is sucked into the engine fan to pass through the inside of the cylindrical cover. For this reason, cooling of the inverter unit and the fuel tank tends to be insufficient.

In addition, the cylindrical cover covering the engine fan, the power generating body, the engine, and the muffler is required to be composed of sheet metal presses or aluminum castings, because a recoil starter is mounted and strength and rigidity are required because a reaction force of starting torque is applied. do. As a result, the weight of the engine generator becomes heavy, making it difficult to reduce the weight.

The present invention is a soundproof engine generator arranged in the order of an inverter, an engine fan, a power generating body, an engine, a recoil fan, and a recoil starter on the same axis from the first intake port side, wherein the engine fan sucks from the first intake port. An inverter storage box, an engine fan cover, and a first cooling wind passage for cooling the inverter, the power generating body, and the engine by the cooling wind, and the recoil fan sucked from the second and third inlets. Cooling through the first cooling wind passage and the second and third cooling wind passages, forming second and third cooling wind passages for cooling the spaces of the front and rear surfaces surrounded by the engine cover, the muffler cover, and the soundproof case; The wind is also characterized in that it is discharged from the exhaust opening after cooling the muffler.

Further, in the present invention, the second cooling wind passage cools the front side of the fuel tank and the back of the operation panel by the cooling wind sucked by the recoil fan from the second intake port, and the third cooling wind passage is the recoil fan. Cooling air drawn from the third intake port cools the rear side of the fuel tank, the carburetor of the engine, and the throttle drive motor mounted thereon.

In addition, the present invention is characterized in that the muffler disposed on the recoil starter.

In addition, the present invention is characterized in that the inverter storage box and the engine fan cover, the engine fan cover and the engine cover, and the engine cover and the exhaust duct are respectively connected through a sealing member.

In addition, the present invention is characterized in that the engine fan cover and the engine cover are mounted to the engine via a sealing member.

In addition, the present invention is characterized in that the engine fan cover is made of resin.

The present invention is also characterized in that the front cover, the rear cover and the engine cover of the soundproof case are made of resin.

1 is a perspective view showing the appearance of a soundproof engine generator according to the present invention, Figure 2 is a cross-sectional view showing the internal structure of the soundproof engine generator according to the present invention, Figure 3 is a soundproof engine generator according to the present invention 4 is an exploded view showing a cooling wind passage of the present invention, FIG. 4 is an exploded view showing a first cooling wind passage of the soundproof engine generator according to the present invention, and FIG. 5 is a second cooling wind passage of the soundproof engine generator according to the present invention. It is sectional drawing which shows the cooling wind passage from the 2nd intake port which forms the form, and FIG. 6 is sectional drawing which shows the cooling wind passage from the 3rd intake port which forms the 3rd cooling wind passage of the soundproof engine generator which concerns on this invention. .

[Description of the code]

1: soundproof engine generator

11: main frame

12: left side cover

13: front cover

14: back cover

15: Right side cover

16: expect

17: wheel

18: operation panel

19: inverter

20: inverter storage box

21: first intake port

22b1: second intake port

22b2: third intake port

23: exhaust port

24: fuel tank

25: fuel tank cap

26: sealing member

31: engine fan cover

32: engine fan

33: generator

34: engine

35: cylinder head

36a: engine cover

36b: engine cover

36c: engine cover

37: air cleaner

38: vent duct

40: ventilation hole

41: Ventilation Duct Cover

51: muffler

52: muffler cover

61: recoil fan

62: starter pulley

63: recoil starter

64: recoil intake

65: Recoil Starter Handle

66: carburetor letter

The perspective view of the soundproof engine generator 1 by this invention of FIG. 1 is demonstrated. The engine, the power generating body, and the like are covered with a soundproof case and cannot be seen from the outside, but this increases the soundproofing effect. The soundproof case is composed of a main frame 11, a left side cover 12, a front cover 13, a right side cover 15 (see FIG. 3) and a rear cover 14 (see FIG. 3) on the rear side. .

On the left side of the main frame 11, an inlet 22b1 for forming the second cooling wind passage and an inlet 22b2 for forming the third cooling wind passage are provided. There is a fuel tank cap 25 above the main frame 11, from which fuel is supplied.

The left side cover 12 is provided with a first intake port 21 for forming a first cooling wind passage.

From the opening of the front cover 13, the control panel 18 provided in the main frame 11 and the recoil starter handle 65 which starts the soundproof engine generator 1 are shown.

Both the front cover 13 and the back cover 14 are made of resin, and the weight is reduced.

Four corners of the lower portion of the soundproof engine generator 1 are provided with wheels 17 so as to be easily moved.

Next, with reference to FIG. 2, the schematic structure of the soundproof engine generator 1 by this invention is demonstrated. 2 is a cross-sectional view showing the internal structure of the soundproof engine generator 1 according to the present invention.

The base 16 of the lower portion of the soundproof engine generator 1 has an inverter 19, an engine fan 32, a power generator 33, and an engine cover on the same axis from the first intake port 21 side. The engine 34 (refer FIG. 4) covered by 36a, 36b, and 36c (refer FIG. 4), the recoil fan 61 covered with the ventilation duct 38, and the recoil starter 63 are provided in order. Each shaft of the starter pulley 62, which is a component of the engine fan 32, the rotor of the power generator 33, the engine 34, the recoil fan 61, and the recoil starter 63, is connected to each other.

The inverter 19 is provided in the inverter storage box 20. There is an intake port 21 in front, and the inverter 19 is directly cooled by the cooling wind. In addition, the inverter 19 directly converts the AC voltage generated by the power generator 33 into a voltage.

The engine fan 32 and the generator 33 are provided in the engine fan cover 31 behind the inverter storage box 20. The engine fan 32 is connected to the rotor of the rear generator 33. The rotor of the power generator 33 has a shaft in the center and is connected to the crankshaft of the engine 34. The engine fan 32 rotates by driving the engine 34 to suck cooling air from the first intake port 21. Similarly, the rotor of the power generating body 33 rotates by the drive of the engine 34, and generates an alternating voltage.

Since the recoil starter 63 is disposed behind the engine 34, the reaction force of the starting torque is not applied to the engine fan cover 31. Therefore, since the fan cover 31 does not need strength and rigidity, it is made of resin. By using the engine fan cover 31 made of resin, the soundproof engine generator 1 is reduced in weight.

The engine 34 is covered with engine covers 36a, 36b and 36c. The engine covers 36a, 36b, and 36c form a cooling passage and also have an effect of suppressing noise during driving. In addition, the fuel sent from the fuel tank 24 through the carburettor 66 (see FIG. 6) is burned to rotate the crankshaft of the engine 34, and the rotor of the engine fan 32 and the generator 33 is rotated. I'm making it. In addition, the crankshaft of the engine 34 is also connected to the recoil fan 61 of the rear part and the starter pulley 62 which is a component of the recoil starter 63, and rotates the recoil fan 61. As shown in FIG.

As described later, since the inside of the soundproof case can be efficiently cooled by the second and third cooling wind passages, the front cover 13 (see FIG. 3) and the back cover 14 (see FIG. 3) of the soundproof case. ) And the engine covers 36a, 36b, and 36c are made of resin, leading to weight reduction of the soundproof engine generator 1.

The front part of the engine fan cover 31 covering the engine fan 32 and the power generator 33 and the rear part of the inverter storage box 20 are connected via a sealing member 26, and the inverter storage box 20 And sucking the air in the sound insulation case from between the engine fan cover 31 is suppressed.

In addition, the rear part of the engine fan cover 31 is connected to the engine covers 36a, 36b, and 36c covering the engine 34, and a sealing member is provided in the gap to cool the inverter 19 and the power generator 33. It prevents wind from leaking into the soundproofing case.

The rear portions of the engine covers 36a, 36b, and 36c are connected to the exhaust duct 38 through a sealing member (not shown), so that the cooling air cooling the engine 34 does not leak into the soundproof case, and the exhaust duct 38 Is induced.

The recoil fan 61 is located behind the engine 34 and in front of the recoil starter 63, and is disposed inside the exhaust duct 38. By driving the engine 34, the recoil fan 61 connected to the crankshaft of the engine 34 rotates. By the rotation of the recoil fan 61, the cooling air sucked from the second inlet port 22b1 and the third inlet port 22b2 is sucked into the inside of the exhaust duct 38 at the recoil inlet port 64 provided in the recoil starter 63. do.

The starter pulley 62, which is a component of the recoil starter 63, is disposed behind the recoil fan 61 and connected to the crankshaft of the engine 34. In addition, the recoil starter 63 houses a reel (not shown) inside, and the cord wound on the reel (not shown) and the recoil starter handle 65 (see FIG. 3) are connected to each other. By retracting the cord with the recoil starter handle 65, the reel is connected with the starter pulley 62, and the crankshaft of the engine 34 is rotated to start the engine 34. After the cord is taken out, the cord is stored in the recoil starter 63 by a reel rewinding mechanism such as a spring. In addition, the connection between the starter pulley 62 and the reel is released after the engine is started.

The muffler 51 is covered by the muffler cover 52 and is provided above the recoil starter 63. The muffler 51 is connected to the engine 34, and the combustion gas generated by the driving of the engine 34 passes through the muffler 51 and is discharged from the exhaust port 23 to the outside of the soundproof case together with cooling air.

By arranging the muffler 51 on the upper portion of the recoil starter 63, the space in the soundproof case can be effectively utilized, and the miniaturization of the soundproof engine generator 1 is realized. In addition, since the recoil fan 61 is housed in the exhaust duct 38 connected to the engine 34 and the recoil starter 63, and the muffler 51 is disposed thereon, the cooling wind can be efficiently collected. And the muffler 51 is cooled efficiently.

The fuel tank 24 is provided to be suspended from the main frame 11 on the upper left side of the soundproof case.

3, the outline of the cooling wind passage by this invention is demonstrated. Here, the cooling wind passage is sucked into the cooling air passage suctioned from the inlet 22b1 which forms the 1st cooling wind passage A by the cooling wind sucked from the 1st inlet port 21, and the 2nd cooling wind passage. (B1), the cooling wind passage suctioned from the inlet 22b2 which forms a 3rd cooling wind passage is demonstrated as cooling wind passage B2.

First, the outline of the cooling wind passage A will be described.

The engine 34 (see FIG. 4) is started by pulling the recoil starter handle 65. The engine fan 32 rotates by driving the engine 34, draws cooling air from the first intake port 21 provided on the left side cover 12, and is stored in the inverter storage box 20. Cool the inverter 19. The cooling wind hits the cooling fins on the front of the inverter 19, cools the inverter 19, and is sucked into the engine fan cover 31 while returning up and down the inverter 19. Since the rear part of the inverter storage box 20 and the front part of the engine fan cover 31 are in close contact with each other by the sealing member 26 (see FIG. 2), the outside air sucked in from the intake port 21 without inhaling air in the soundproofing case. Only is sucked into the engine fan cover 31.

The cooling wind cools the power generating body 33 (see FIG. 4) in the engine fan cover 31, and is fed into the engine covers 36a, 36b and 36c (see FIG. 4) to cool the engine 34. The wind which cooled the engine 34 is supplied in the wind duct 38. The engine 34, the engine fan cover 31, and the engine covers 36a, 36b, and 36c are mounted through the sealing member, respectively, and the engine fan cover 31, the engine covers 36a, 36b, and 36c are respectively It connects through a sealing member (not shown), and prevents cooling air from being discharged | emitted in a soundproofing case. However, in order to efficiently cool the throttle drive motor (not shown) attached to the carburettor 66 (refer FIG. 6), the sealing member of the engine 34 and the engine fan cover 31 near the carburettor 66 is effective. Is removed, and the air around the throttle drive motor is convection. Since the engine covers 36a, 36b, and 36c and the air duct 38 are in close contact with each other through a sealing member (not shown), cooling air is sent into the air duct 38 without leaking into the soundproofing case.

Next, the outline of the cooling wind passage B1 and the cooling wind passage B2 will be described.

The recoil fan 61 (see FIG. 2) rotates to introduce cooling air into the soundproofing case from the second intake port 22b1 and the third intake port 22b2 provided on the left side of the main frame 11. The introduced cooling air cools the space surrounded by the inverter storage box 20, the engine fan cover 31, the engine covers 36a, 36b, and 36c, the air duct 38, and the muffler cover 52 and the soundproof case, It is sucked into the recoil intake port 64 provided in the recoil starter 63.

The cooling wind passage B1 mainly cools the front side of the fuel tank 24 (refer FIG. 2) and the back surface of the operation panel 18.

In addition, the cooling wind passage B2 mainly cools the back side of the fuel tank 24, the carburetor 66, and the throttle drive motor.

The cooling winds passing through the respective cooling wind passages join in the engine exhaust duct 38 to cool the muffler 51 (see FIG. 2) stored in the muffler cover 52, and then the right side of the main frame 11. It discharges from the exhaust port 23 (refer FIG. 2) provided in this.

With reference to FIG. 4, the cooling air passage A by this invention is demonstrated in detail.

When the recoil starter handle 65 is tensioned to drive the engine 34, the engine fan 32 that connects to the crankshaft of the engine 34 rotates. As shown in FIG. 3, cooling air is sucked in from the 1st intake port 21 (refer FIG. 3) provided in the left side cover 12 (refer FIG. 3), and the inverter storage box 20 (refer FIG. 3). The inverter 19 (refer FIG. 3) stored in the refrigerator is cooled. The wind cooling the inverter 19 is sucked into the engine fan cover 31. Since the inverter storage box 20 and the engine fan cover 31 are in close contact with each other by the sealing member 26 (see FIG. 2), only the outside air sucked in from the intake port 21 without inhaling the air in the soundproof case is the engine. It is sucked into the fan cover 31.

The cooling air sucked into the engine fan cover 31 cools the power generator 33.

Thereafter, the cooling wind cools the engine 34 located behind the power generator 33. The engine 34, the engine fan cover 31, and the engine covers 36a, 36b, and 36c are mounted through the sealing member, respectively, and the engine fan cover 31, the engine covers 36a, 36b, and 36c are respectively Since it is connected through the sealing member (not shown), and the leakage of cooling wind is prevented, the engine 34 is cooled efficiently by the cooling wind which the engine fan draws.

In addition, in order to efficiently cool the throttle drive motor (not shown) mounted on the carburetor 66 (refer to FIG. 6), the sealing member of the engine 34 and the engine fan cover 31 near the carburetor 66 Is removing. In this structure, in order to cool the throttle drive motor efficiently, the sealing member is removed and air is convexed. However, the sealing member is also added to this portion to intake air through the duct or the like from the third inlet 22b2 (see FIG. 3). Can also be derived.

In addition, the engine fan 32 and the generator 33 serving as the noise source are surrounded by the engine cover 31, and the engine 34 serving as the noise source is surrounded by the engine covers 36a, 36b, and 36c. Is excellent. In addition, since they are surrounded by the main frame 11, the front cover 13, the left side cover 12, the right side cover 15, and the back cover 14 (refer FIG. 3 respectively) which comprise a soundproof case, 2 The soundproofing structure in the middle enhances the soundproofing effect.

The engine covers 36a, 36b, and 36c covering the engine 34 and the ventilating duct 38 are connected through a sealing member (not shown), so that the cooling wind cooling the engine 34 is discharged into the soundproof case. Instead, it is fed into the air duct 38 via the ventilation hole 40. In the engine exhaust duct 38, it mixes with the cooling wind passage B1 and the cooling wind which passed through the cooling wind passage B2, and is sent into the muffler cover 52. As shown in FIG. The muffler 51 stored in the muffler cover 52 is cooled and discharged to the outside from the exhaust port 23 (see FIG. 2) provided on the right side of the main frame 11 (see FIG. 3).

The cooling air passage B1 will be described in detail with reference to FIG. 5.

By the drive of the engine 34 (refer FIG. 4), the recoil fan 61 which connects with the crankshaft of the engine 34 rotates. When the recoil fan 61 rotates, external air is sucked into the soundproof case from the second intake port 22b1 provided on the front side of the left side of the main frame 11.

The cooling air sucked into the soundproofing case first cools the rear surface of the control panel 18 (see FIG. 3) provided on the front side of the fuel tank 24 and the front side of the main frame 11.

After cooling the surfaces of the engine fan cover 31 and the engine covers 36a and 36b, the engine fan cover 31 is sucked into the recoil intake port 64 provided in the recoil starter 63.

The cooling air sucked into the recoil intake port 64 is fed to the exhaust duct 38. Here, in the engine exhaust duct 38, it mixes with the cooling wind which passed through the cooling wind passage A and the cooling wind passage B2, and is supplied into the muffler cover 52. As shown in FIG. After cooling the muffler 51, the muffler 51 is discharged to the outside from the exhaust port 23 provided on the right side of the main frame 11.

Radiation heat from the surface of the engine 34 or cooling wind from the first cooling wind passage leaked from the surroundings of the carburettor 66 (see FIG. 6) increases the temperature in the soundproof case, and thus the electrical components of the operation panel 18. Although the temperature of the fuel tank 24 rises to some extent, it cools effectively by the cooling wind passage B1, and temperature rise is suppressed.

With reference to FIG. 6, the cooling wind passage B2 is demonstrated in detail.

By driving of the engine 34 (refer FIG. 4), the recoil fan 61 connected with the crankshaft of the engine 34 rotates. By the rotation of the recoil fan 61, external air is sucked into the soundproof case from the third intake port 22b2 provided on the rear side of the left side of the main frame 11.

The cooling wind sucked in the soundproof case first cools the back side of the fuel tank 24.

And a part of it is sucked in the air cleaner 37, and the surface of the carburettor 66, the cylinder head 35, the engine fan cover 31, the engine cover 36a (refer FIG. 4), and the engine cover 36c. After cooling, the recoil suction port 64 is sucked in.

The cooling air sucked into the recoil intake port 64 is fed to the exhaust duct 38. Here, in the engine exhaust duct 38, it mixes with the cooling wind which passed through the cooling wind passage A and the cooling wind passage B1, and is supplied into the muffler cover 52. As shown in FIG. After cooling the muffler 51 provided in the muffler cover 52, the muffler 51 is discharged to the outside from the exhaust port 23 provided on the right side of the main frame 11.

Radiation heat from the surface of the engine 34 or cooling wind from the first cooling wind passage leaking out from the periphery of the carburetor 66 causes the temperature in the soundproofing case to rise, and fuel in the fuel tank 24 and the carburetor 66. Although the temperature of the temperature rises to some extent, it cools effectively by the cooling wind path B2, and temperature rise is suppressed.

According to the present invention, since the recoil starter is arranged behind the engine, a large amount of cooling wind is sucked from the outside without blocking the first cooling wind passage sucked by the engine fan, thereby achieving an efficient cooling effect.

In addition, since the inverter storage box, engine fan cover, engine cover, and exhaust duct are each sealed by a sealing member, the cooling air sucked by the engine fan does not leak to the cover, and the inverter, power generator, and engine can be efficiently cooled sequentially. have.

In addition, the space surrounded by the inverter storage box, the engine fan cover, the engine cover, the muffler cover, and the soundproof case can be cooled by the cooling wind sucked by the recoil fan. The electric parts of the operation panel, the carburettor's throttle drive motor, and the fuel tank and the carburetor fuel can also be cooled by radiant heat from the engine surface, and the fuel in the fuel tank and the carburetor can be cooled. I'm letting you.

In addition, by arranging the muffler in the upper part of the recoil starter and the upper part of the exhaust duct joining the cooling wind, which is sucked by the engine fan or the recoil fan, the muffler can be efficiently cooled and the effective use of the space in the soundproof case Miniaturization of the engine generator is realized.

Further, by placing the recoil starter behind the engine, no reaction force of the starting torque is applied to the engine fan cover, whereby strength and rigidity are unnecessary, and the engine fan cover can be made of resin. As a result, weight reduction is realized.

Further, as described above, since the second and third cooling wind passages can be provided to efficiently cool the inside of the soundproof case, the front cover, the back cover, and the engine cover of the soundproof case can be made of resin, which also reduces the weight of the generator. Leading to.

Claims (7)

A soundproof engine generator arranged in the order of an inverter, an engine fan, a power generator, an engine, a recoil fan, and a recoil starter on the same axis from the first inlet port side, wherein the engine fan is sucked from the first inlet port by cooling wind. A first cooling wind passage for cooling the inverter, the power generator, and the engine, and the inverter storage box, the engine fan cover, the engine cover, and the muffler by the cooling wind that the recoil fan sucks from the second and third intake ports. An exhaust port after forming the second and third cooling wind passages for cooling the space surrounded by the cover and the soundproofing case, and the cooling wind via the first cooling wind passage, the second and third cooling wind passages also cools the muffler. Soundproof engine generator, characterized in that the discharge from. The cooling fan according to claim 1, wherein the second cooling wind passage cools the front side of the fuel tank and the back of the operation panel by the cooling wind sucked by the recoil fan from the second intake port, and the third cooling wind passage is the recoil fan. The soundproof engine generator characterized by cooling the back side of the fuel tank, the carburetor of the engine, and the throttle drive motor provided thereon by the cooling wind sucked from the third intake port. The soundproof engine generator according to claim 1, wherein the muffler is disposed above the recoil. The soundproof engine generator according to claim 1, wherein the inverter storage box and the engine fan cover, the engine fan cover and the engine cover, and the engine cover and the exhaust duct are respectively connected through a sealing member. . The soundproof engine generator according to claim 1, wherein the engine fan cover and the engine cover are provided in the engine via a sealing member. The soundproof engine generator according to claim 1, wherein the engine fan cover is made of resin. The soundproof engine generator according to claim 1, wherein the front cover, the rear cover and the engine cover of the soundproof case are made of resin.

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