JP2010222998A - Engine power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine power generator improvable in sound insulation performance. <P>SOLUTION: A pair of first inlets 52, 52 which communicate with the outside and introduce outside air are provided at one end side of a first duct member 81, and a first outlet 814 for guiding out cooling air is provided at the other end side of the first duct member 81. A first air flow passage 815 serving as a cooling air passage is formed between the pair of first introduction ports 52, 52 and the first outlet 814 in the first duct member 81. A plurality of first plate-like members 816, 816, 816 which project from both sides of the inner peripheral wall of the first air flow passage 815 toward the center 815A of the first air flow passage 815 diagonally from the pair of first inlet 52, 52 side to the first outlet 814 side are alternately provided in a direction in which the cooling air flows. Projecting ends of the plurality of first plate-like members 816, 816, 816 are formed so as to be overlapped with one another when viewed from the direction in which the cooling air flows. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine generator that drives a generator by an engine, and more particularly, to a technology for a soundproof structure related to an engine generator.

  Conventionally, the technique of the soundproof structure which concerns on an engine generator is well-known (for example, refer patent document 1). In the engine generator described in Patent Document 1, an engine and a generator are provided side by side in a casing, and a fuel tank is provided above the generator. An inlet for introducing outside air into the casing is provided on the engine side and the generator side on the lower side of both sides of the casing, and engine power is generated by the outside air (cooling air) introduced into the casing from each inlet. It is possible to cool the machine.

  However, the engine generator described in Patent Document 1 cools by introducing outside air from each inlet, but noise in the housing leaks from each inlet, so that sufficient soundproof performance cannot be obtained. There was a problem.

JP 2008-14164 A

  The present invention has been made in view of the above situation, and provides an engine generator capable of improving soundproof performance.

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

  That is, in claim 1, an engine having a cooling fan, a generator that is arranged in parallel with the engine and driven by the engine, a case member that houses the engine and the generator, and the case member A duct member that is provided in the duct and serves as a passage for cooling air, wherein one end of the duct member is provided with an introduction port that communicates with the outside and introduces outside air. On the other end side of the member, a lead-out port for leading cooling air is provided, and a ventilation path is formed between the introduction port and the lead-out port in the duct member, and an inner peripheral wall of the ventilation path From both sides, a plurality of plate-like members that incline and project from the inlet side toward the outlet side toward the center of the ventilation path are alternately provided in the direction in which the cooling air flows. Protruding end portions of the plurality of plate-like member, is provided so as to overlap when viewed from a direction in which the cooling air flows.

  The duct member may be provided on one side of the engine in the case member, the introduction port may be provided on a lower end side of the case member, and the lead-out port may be provided on the case member. It is provided so as to face the fuel injection pump of the engine on the upper end side.

  According to a third aspect of the present invention, the duct member is provided below the generator, and the outlet port is provided so as to face an oil pan of the engine.

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

  In Claim 1, the noise which entered the duct member from the outlet is reflected by the plate member. Thereby, the noise leaking from the inlet is reduced, and the soundproof performance of the engine generator can be improved.

  According to the second aspect of the present invention, since the distance from the outlet to the inlet is increased and the duct member can be lengthened, the noise attenuation effect is improved. Thereby, it is possible to further improve the soundproof performance of the engine generator. Furthermore, it is possible to efficiently cool the fuel injection pump and improve the cooling performance of the engine generator.

  According to the third aspect of the present invention, the oil pan can be efficiently cooled to improve the cooling performance of the engine generator.

The front view which shows an engine generator. The left view which shows an engine generator. Front sectional drawing which shows the internal structure of an engine generator. The plane partial cross section figure which shows a 1st duct member, a 2nd duct member, a 4th duct member, a 5th duct member, and a 6th duct member. The left side sectional view showing the 2nd duct member, the 4th duct member, and the 5th duct member. The front sectional view showing the flow of cooling air and exhaust air in the case member. The plane sectional view showing the 1st duct member. The perspective view which shows a 1st duct member. The figure which shows the inside of a 1st duct member typically. The top view which shows the inside of a 2nd duct member. Front sectional drawing which shows a 3rd duct member and an exhaust duct member. The plane sectional view showing the 3rd duct member and the exhaust duct member. The perspective view which shows a 3rd duct member.

  Next, modes for carrying out the invention will be described.

  Below, the engine generator 1 which is one Embodiment of the engine generator which concerns on this invention is demonstrated using FIGS. 1-13.

  In the following description, the front / rear direction is defined with the side on which the operation panel 55 (see FIG. 1) is provided in the engine generator 1 as the front, and the left side is the left when the engine generator 1 is viewed from the front. The “left-right direction” is defined as “L”, and the “up-down direction” is defined with the direction in which gravity acts as the lower direction, and explanation will be made using these defined directions.

  As shown in FIGS. 1 and 2, the engine generator 1 includes an engine 10, a generator 20, a fuel tank 30, a base member 40, and a case member 50.

  The engine 10 is a drive source for the generator 20. The engine 10 includes a cylinder block 11, an oil pan 12, and a cylinder head 13. A crankshaft 15 is installed in the cylinder block 11 in the horizontal direction (left-right direction).

  A fuel injection pump 14 is provided at the front side of the cylinder block 11 to pump the fuel at a high pressure. From the left and right sides of the cylinder block 11, the left end and the right end of the crankshaft 15 protrude leftward and rightward, respectively. A first cooling fan 16 that introduces outside air as cooling air into the case member 50 is provided at the right end of the crankshaft 15.

  The oil pan 12 accumulates lubricating oil for the engine 10. The oil pan 12 is provided below the cylinder block 11. The cylinder head 13 is provided on the upper side of the cylinder block 11. An intake port is provided on the right side of the cylinder head 13, and an air cleaner 171 is connected to the intake port via an intake pipe 17. An exhaust port is provided on the left side of the cylinder head 13, and one end of an exhaust pipe 18 is connected to the exhaust port. A first silencer 181 and a second silencer 182 are provided in the middle of the exhaust pipe 18 in order from the exhaust upstream side. The other end of the exhaust pipe 18 serves as an exhaust port 183 that exhausts exhaust gas. The first silencer 181 and the second silencer 182 are accommodated in the exhaust case member 51.

  The exhaust case member 51 is a member configured in a substantially rectangular shape in a side view. From the upper part of the exhaust case member 51, the exhaust port 183 protrudes upward. Exhaust air outlets 511, 511, 511, and 511 are provided on the left side plate of the exhaust case member 51. The exhaust outlets 511, 511, 511, and 511 are configured by arranging a plurality of long holes in the horizontal direction in the vertical direction.

  The generator 20 is driven (power generation) by the engine 10. The generator 20 is provided on the left side of the engine 10. That is, the generator 20 is provided side by side with the engine 10 in the horizontal direction (left-right direction). The generator 20 includes a rotor that serves as a power generator, a second cooling fan 21 that introduces outside air that serves as cooling air into the case member 50, and the rotor and the second cooling fan 21 are connected to the crankshaft 15 of the engine 10. Provided at the left end. A battery 60 is provided on the front side of the generator 20.

  The fuel tank 30 stores fuel for the engine 10. The fuel tank 30 is provided above the generator 20. The fuel tank 30 is configured in a substantially rectangular shape when viewed from the front.

  The case member 50 houses the engine 10, the generator 20, the fuel tank 30, the battery 60, and the like. The case member 50 is provided with a first duct member 81, a second duct member 82, a third duct member 83, a fourth duct member 84, a fifth duct member 85, a sixth duct member 86, and an exhaust duct member 87. It is done.

  The first duct member 81 is provided on the front side of the engine 10 on the right side in the case member 50. The second duct member 82 is provided on the lower side in the case member 50 from the lower side of the generator 20 to the lower side of the engine 10. The third duct member 83 is provided on the left side of the fuel tank 30 on the left side in the case member 50. The fourth duct member 84 is provided on the left side in the case member 50 on the front side of the generator 20. The fifth duct member 85 is provided below the generator 20 on the left side in the case member 50. The sixth duct member 86 is provided on the rear side of the engine 10 on the right side in the case member 50. The exhaust duct member 87 is provided between the engine 10, the generator 20, and the fuel tank 30.

  The case member 50 is a member configured in a substantially rectangular shape when viewed from the front, and the lower side of the case member 50 opens. The shape of the case member 50 is such that the front side plate, the rear side plate, the left side plate, and the right side plate are connected to the four sides of the top plate (upper side plate) formed in a substantially rectangular shape. A pair of left and right first introduction ports 52 and 52 and a pair of left and right fourth introduction ports 58 and 58 are provided on the front side plate of the case member 50, and a pair of front and rear third introductions are provided on the left side plate of the case member 50. Ports 53 and 53 are provided.

  The pair of first introduction ports 52 and 52 and the pair of third introduction ports 53 and 53 are both in communication with the outside and introduce outside air. That is, by the rotation of the first cooling fan 16, outside air is introduced into the case member 50 from the pair of first introduction ports 52 and 52 and the pair of third introduction ports 53 and 53. Become. The pair of first introduction ports 52 and 52 and the pair of third introduction ports 53 and 53 are configured by arranging a plurality of long holes extending in the horizontal direction in the vertical direction.

  The pair of first introduction ports 52 and 52 are provided on the right side in the lower portion of the front plate of the case member 50. That is, the pair of first introduction ports 52 and 52 are provided on the engine 10 side. The pair of third introduction ports 53 and 53 are provided at the upper part of the left side plate of the case member 50 so as to be distributed forward and backward. That is, the pair of third introduction ports 53 and 53 are provided on the fuel tank 30 side.

  The pair of fourth introduction ports 58 and 58 communicate with the outside and introduce outside air. That is, by the rotation of the second cooling fan 21, outside air is introduced into the case member 50 from the pair of fourth introduction ports 58 and 58, and the introduced outside air becomes cooling air. The pair of fourth introduction ports 58 and 58 are configured by arranging a plurality of long holes extending in the horizontal direction in the vertical direction. The pair of fourth introduction ports 58 and 58 are provided on the left side of the front plate of the case member 50. That is, the pair of fourth introduction ports 58 and 58 are provided on the generator 20 side.

  An opening / closing door 54 is provided at the lower part of the front plate of the case member 50, and an operation panel 55 is provided at the upper part of the front plate of the case member 50. The open / close door 54 is configured to be able to open and close by rotating in the horizontal direction. By opening and closing the open / close door 54, the inspection and replacement of the battery 60, the fuel filter, the lubricating oil, etc. in the case member 50 can be facilitated. Can do. The operation panel 55 is provided with switches for controlling the operation of the engine generator 1, an output terminal for outputting the generated power, an hour meter for measuring the usage time of the engine generator 1, an outlet, a voltmeter, a lamp, and the like. .

  Handles 56 and 56 are provided on upper portions of the left side plate and the right side plate of the case member 50, respectively, which become handles when an operator carries the engine generator 1. The upper plate of the case member 50 is provided with a hooking portion 57 that serves as a portion for hooking the hook when the engine generator 1 is suspended. An exhaust case member 51 is attached to the left side plate of the case member 50. A base member 40 is attached to the lower part of the case member 50.

  The base member 40 mounts the engine 10, the generator 20, the battery 60, and the like. The base member 40 is a member configured in a substantially rectangular shape in front view, and the upper side of the base member 40 opens. The shape of the base member 40 is such that the front side plate, the rear side plate, the left side plate, and the right side plate are connected to the four sides of the lower side plate formed in a substantially rectangular shape.

  A pair of front and rear axles 42 and 42 are provided at both left and right parts of the base member 40, and a pair of wheels 43 and 43 are provided at both ends of each axle 42, so that the wheels 43, 43. Thus, the engine generator 1 can be easily moved.

  As shown in FIGS. 3, 4, and 6 to 8, the front side and the right side of the first duct member 81 are connected to the front side plate and the right side plate of the case member 50, respectively. As shown in FIG. 7, a facing surface 813 that faces the fuel injection pump 14 of the engine 10 is formed between the left side plate 811 and the rear side plate 812 in the first duct member 81. A first outlet 814 is provided on the upper portion of the facing surface 813. That is, the first outlet port 814 is provided at the upper portion of the facing surface 813 on the upper end portion side of the first duct member 81, while the front plate of the case member 50 on the lower end portion side of the first duct member 81 has a pair. The first introduction ports 52 and 52 are provided.

  The first outlet 814 is for leading out cooling air. The first outlet 814 is opened in a substantially rectangular shape when viewed from a direction orthogonal to the facing surface 813. In the first duct member 81, a first air passage 815 is provided between the pair of first inlets 52 and 52 and the first outlet 814. In the 1st ventilation path 815, the 1st plate-shaped member 816 * 816 * 816 (refer FIG. 8 and FIG. 9) is provided.

  As shown in FIGS. 8 and 9, the first plate-like members 816, 816, and 816 are arranged from the left and right side surfaces of the inner peripheral wall of the first ventilation path 815 to the center side 815 A of the first ventilation path 815 (see FIG. 9). Inclined toward the first outlet port 814 side (upper end side of the first duct member 81) from the pair of first inlet ports 52 and 52 side (lower end side of the first duct member 81) (inclination shown in FIG. 9) They are provided alternately on the left and right in the direction in which the cooling air flows so as to protrude at an angle α). That is, the first plate-like members 816, 816, 816 are provided so as to reflect noise leaking from the first outlet 814 toward the first outlet 814.

  The inclination angle (inclination angle with respect to the horizontal direction) α of the first plate members 816, 816, and 816 is determined from the viewpoint of sufficiently ensuring the noise attenuation effect. For example, the first plate members 816, 816, and 816 The inclination angle α is 30 degrees. The protruding tip portions of the first plate-like members 816, 816, and 816 are provided so as to overlap (overlap length L shown in FIG. 9) when viewed from the direction in which the cooling air flows. The minimum interval between the adjacent first plate-like members 816 and 816 is the interval D2 shown in FIG. The interval D2 is determined from the viewpoint of ensuring a sufficient flow of cooling air. Around the plate surfaces of the first plate-like members 816, 816, and 816, the first sound absorbing materials 816A, 816A, and 816A are attached. The first sound absorbing material 816A, 816A, 816A reduces noise leaking from the pair of first inlets 52, 52 by absorbing noise. The first sound absorbing material 816A / 816A / 816A is made of, for example, glass wool, urethane, or rubber urethane.

  As shown in FIGS. 3 to 6 and 10, the second duct member 82 is configured in a substantially L shape in plan view. The lower side of the second duct member 82 is connected to the lower plate of the base member 40. The second duct member 82 has a first duct part 821 and a second duct part 822.

  The first duct portion 821 is provided in the front-rear direction. A second inlet 821A is provided at the front end of the first duct portion 821. The second duct part 822 is provided in the left-right direction. The left end portion of the second duct portion 822 communicates with the rear end portion of the first duct portion 821. A second outlet 823 is provided at the right end of the upper plate of the second duct part 822.

  The second outlet 823 is for leading out cooling air. The second outlet 823 is opened in a substantially rectangular shape in plan view. The second outlet 823 is provided to face the lower surface of the oil pan 12 of the engine 10. In the second duct member 82, a second ventilation path 824 is provided between the second inlet 821A and the second outlet 823. In the 2nd ventilation path 824, the 2nd plate-shaped member 825 * 825 * 825 (refer FIG. 10) is provided.

  As shown in FIG. 10, the second plate-like members 825, 825, and 825 are second duct members 82 from the front and rear side surfaces of the inner peripheral wall of the second ventilation path 824 toward the center side 824 A of the second ventilation path 824. Cooling air so as to protrude from the left end side (second inlet 821A side) of the second duct member 82 to the right end side (second outlet 823 side) of the second duct member 82 with an inclination (inclination angle α shown in FIG. 10). Are provided alternately in the front-rear direction in the flow direction. That is, the second plate-like members 825, 825, and 825 are provided so as to reflect noise leaking from the second outlet 823 toward the second outlet 823.

  The inclination angle (inclination angle with respect to the horizontal direction) α of the second plate-like members 825, 825, and 825 is determined from the viewpoint of sufficiently ensuring the noise attenuation effect. For example, the second plate-like members 825, 825, and 825 The inclination angle α is 30 degrees. The protruding tip portions of the second plate-like members 825, 825, and 825 are provided so as to overlap (the overlapping length L shown in FIG. 10) when viewed from the direction in which the cooling air flows. The minimum interval between the adjacent second plate members 825 and 825 is the interval D2 shown in FIG. The interval D2 is determined from the viewpoint of ensuring a sufficient flow of cooling air. Second sound absorbing materials 825A, 825A, and 825A are attached around the plate surfaces of the second plate-like members 825, 825, and 825. The second sound absorbing materials 825A, 825A, and 825A reduce noise leaking from the second introduction port 821A side (the pair of fourth introduction ports 58 and 58) by absorbing noise. The second sound absorbing material 825A / 825A / 825A is made of, for example, glass wool or urethane.

  As shown in FIGS. 3, 6, 11 to 13, the left side of the third duct member 83 is connected to the left side plate of the case member 50. A third outlet 831 is provided on the right side plate of the third duct member 83. In other words, the third outlet 831 is provided on the right side (engine 10 side) of the third duct member 83, while the left side plate of the case member 50 on the left side (opposite to the engine 10) of the third duct member 83. Are provided with a pair of third inlets 53.

  The third outlet 831 is for leading out cooling air. The third outlet 831 is opened in a substantially rectangular shape when viewed from the side. The third outlet 831 is provided so as to face the left side surface of the fuel tank 30. The third outlet 831 is provided at a substantially central portion in the front-rear direction of the third duct member 83. That is, the third outlet 831 is provided at a substantially central portion between the front and rear of the pair of third inlets 53 and 53, and the pair of third inlets 53 and 53 are arranged front and rear across the third outlet 831. It is provided separately.

  As shown in FIGS. 3 to 6, the left side of the fourth duct member 84 is connected to the left side plate of the case member 50, and the front side of the fourth duct member 84 is connected to the front side plate of the case member 50. The lower side of the fourth duct member 84 serves as a fourth outlet 841 for leading out cooling air. A pair of fourth introduction ports 58 and 58 are provided on the front side plate of the case member 50 on the upper end side of the fourth duct member 84.

  Although detailed explanation is omitted, plate-like members corresponding to the first plate-like members 816, 816, 816 or the second plate-like members 825, 825, 825 are also provided in the fourth duct member 84.

  A fifth inlet 851 is provided on the front side of the fifth duct member 85. The upper plate of the fifth duct member 85 is provided with a fifth outlet 852 for leading cooling air. The fifth outlet 852 is opened in the upper plate of the fifth duct member 85.

  As shown in FIG. 4, the sixth duct member 86 is provided with a sixth outlet 861 for leading out the cooling air. The sixth outlet 861 is provided to face the right rear portion of the engine 10. A rear plate of the case member 50 on the rear side of the sixth duct member 86 is provided with a sixth introduction port 59 that communicates with the outside and introduces outside air.

  Although a detailed description is omitted, the fourth duct member 84 and the sixth duct member 86 also have plate shapes corresponding to the first plate members 816, 816, 816 or the second plate members 825, 825, 825. It is possible to provide a member

  As shown in FIGS. 2, 3, 6, and 11, the air exhaust duct member 87 is configured by combining an upper plate 871 and a pair of front and rear side plates 872 and 872. The right side and the lower side are opened. The fuel tank 30 is accommodated above the exhaust duct member 87, and the engine 10 and the generator 20 are accommodated below the exhaust duct member 87.

  The left end portion of the upper plate 871 is connected to the right plate of the exhaust case member 51, and the right end portion of the upper plate 871 reaches the left side of the engine 10 (cylinder head 13). On the left end side of the upper plate 871 (the side opposite to the engine 10), an inlet portion 781 into which cooling air enters the third ventilation path 78 is provided, while on the right end portion side (engine 10 side) of the upper plate 871. In addition, an outlet portion 782 from which cooling air flows from the third ventilation path 78 is provided. In the right end portion of the upper plate 871, an inclined portion 871 </ b> B that is bent upward and inclined near the lower right corner portion of the fuel tank 30 is provided.

  The left end portions of the pair of front and rear side plates 872 and 872 of the exhaust duct member 87 are connected to the right side plate of the exhaust case member 51, respectively, and the right end portions of the pair of front and rear side plates 872 and 872 are further to the right than the upper plate 871. Thus, it reaches the side of the cylinder head 13 (near the air cleaner 171).

  The upper plate 871 of the exhaust duct member 87 is provided between the generator 20 and the fuel tank 30 and covers the lower surface of the fuel tank 30 with a predetermined distance D1 from the lower surface of the fuel tank 30. The interval D1 is determined from the viewpoint of ensuring a sufficient flow of cooling air. A third ventilation path 78 is formed between the upper plate 871 and the fuel tank 30.

  A sound absorbing material 871A is attached to the upper surface of the upper plate 871. The sound absorbing material 871 </ b> A reduces noise leaking from the pair of third introduction ports 53 and 53 by absorbing noise. The sound absorbing material 871A is made of, for example, glass wool, urethane, or rubber urethane.

  In the configuration as described above, the flow of cooling air and exhaust air in the case member 50 in the engine generator 1 is as shown in FIGS. 4 to 6, 11, and 12.

  As shown in FIGS. 4 and 6, in the first duct member 81, outside air (cooling air) 911 and 911 introduced from the pair of first introduction ports 52 and 52 passes through the inside of the first duct member 81. The cooling air 912 is led out from one outlet 814 toward the fuel injection pump 14, and the fuel injection pump 14 is cooled by the cooling air 912. The cooling air 912 cools the fuel injection pump 14 and then cools the entire engine 10 (cooling air 913 shown in FIGS. 4 and 6).

  Next, as shown in FIG. 6, in the third duct member 83, the outside air (cooling air) 931 and 931 introduced from the pair of third introduction ports 53 and 53 passes through the third duct member 83 to the second. The cooling air 932 is led out toward the fuel tank 30 from the three outlets 831, and the cooling air 932 passes through the periphery of the fuel tank 30 (such as the third ventilation path 78) to cool the fuel tank 30. The cooling air 932 cools the fuel tank 30 and then cools the entire engine 10 (cooling air 933 shown in FIG. 6). The cooling air 933 smoothly flows to the right from the right end portion of the upper plate 871 by the inclined portion 871B of the exhaust air duct member 87.

  Here, the detailed flow of the cooling air 932 of the 3rd duct member 83 is demonstrated using FIG. 11 and FIG. The cooling air 932 includes an upper cooling air 932A passing through the upper side of the fuel tank 30, a lower cooling air 932B passing through the lower side (third ventilation path 78) of the fuel tank 30, and a rear cooling air passing through the rear side of the fuel tank 30. 932C and front cooling air 932D passing through the front side of the fuel tank 30 are separated. The upper cooling air 932A cools the upper side of the fuel tank 30, the lower cooling air 932B cools the lower side of the fuel tank 30, the rear cooling air 932C cools the rear side of the fuel tank 30, and the front cooling air 932D. Cools the front side of the fuel tank 30.

  Next, as shown in FIGS. 4 to 6, in the fourth duct member 84, the outside air (cooling air) 941 and 941 introduced from the pair of fourth introduction ports 58 and 58 passes through the fourth duct member 84. It passes through the fourth outlet 841 toward the second duct member 82 and the fifth duct member 85 as cooling air 942 and cooling air 943.

  In the second duct member 82, the cooling air 942 from the fourth duct member 84 is introduced from the second introduction port 821 </ b> A and becomes the cooling air 921 through the second duct member 82 (second air passage 824). The oil pan 12 is led out from the second outlet 823 toward the oil pan 12, and the oil pan 12 is cooled by the cooling air 921. The cooling air 921 cools the oil pan 12 and then cools the entire engine 10 (cooling air 922 and 923 shown in FIGS. 4 and 6).

  In the fifth duct member 85, the cooling air 943 from the fourth duct member 84 is introduced from the fifth introduction port 851, becomes the cooling air 951, passes through the fifth duct member 85, and passes through the fifth outlet port 852. Derived toward the generator 20, the generator 20 is cooled by the cooling air 951. The cooling air 951 cools the generator 20 and then flows into the exhaust air duct member 87 from below the exhaust air duct member 87 (cooling air 952 shown in FIG. 6).

  As shown in FIG. 4, in the sixth duct member 86, the outside air (cooling air) 961 introduced from the sixth inlet 59 passes through the sixth duct member 86 and is cooled from the sixth outlet 861. 962 is led out toward the right rear portion of the engine 10 to cool the entire engine 10 (cooling air 962 shown in FIG. 4).

  Thus, as shown in FIG. 6, the cooling air 912 from the first duct member 81, the cooling air 921 from the second duct member 82, the cooling air 932 from the third duct member 83, and the cooling from the fifth duct member 85. The air 951 and the cooling air 962 (see FIG. 4) from the sixth duct member 86 pass through the exhaust case member 51 from the exhaust air duct member 87 and pass through the exhaust pipe 18, the first silencer 181, and the second silencer 182. After cooling (cooling air 97 shown in FIG. 6), the air is discharged to the outside from the exhaust air outlets 511, 511, 511, and 511 of the exhaust case member 51 (exhaust air 98 shown in FIG. 6).

  As described above, the engine generator 1 according to the embodiment of the present invention includes the engine 10 having the first cooling fan 16, the generator 20 provided side by side with the engine 10 and driven by the engine 10. The engine generator 1 includes a case member 50 that houses the engine 10 and the generator 20, and a first duct member 81 (second duct member 82) that is provided in the case member 50 and serves as a cooling air passage. In addition, one end of the first duct member 81 (second duct member 82) has a pair of first introduction ports 52 and 52 (a pair of second introduction ports 41 and 41) that communicate with the outside and introduce outside air. ) And a first outlet port 814 (second outlet port 823) for leading cooling air is provided on the other end side of the first duct member 81 (second duct member 82). 81 (second duck In the member 82), between the pair of first introduction ports 52 and 52 (the pair of second introduction ports 41 and 41) and the first outlet port 814 (second outlet port 823), the first ventilation path 815 ( A second ventilation path 824) is formed, and from both sides of the inner peripheral wall of the first ventilation path 815 (second ventilation path 824) to the central side 815A (824A) of the first ventilation path 815 (second ventilation path 824). A plurality of first plate-like members that incline and project from the pair of first introduction ports 52 and 52 (the pair of second introduction ports 41 and 41) toward the first outlet 814 (second outlet 823). 816, 816, 816 (second plate members 825, 825, 825) are alternately provided in the direction in which the cooling air flows, and a plurality of first plate members 816, 816, 816 (second plate members 825, 825, 825) is the direction in which the cooling air flows It is provided so as to overlap when viewed al.

  With such a configuration, noise that has entered the first duct member 81 (second duct member 82) from the first outlet 814 (second outlet 823) is transmitted to the first plate members 816, 816, 816 (first). Reflected by the two plate-like members 825, 825, 825). Thereby, noise leaking from the pair of first introduction ports 52 and 52 (the pair of second introduction ports 41 and 41) is reduced, and the soundproof performance of the engine generator 1 can be improved.

  The first duct member 81 is provided on one side of the engine 10 in the case member 50, and the pair of first introduction ports 52 and 52 are provided on the lower end side of the case member 50, and the first outlet port 814. Is provided so as to face the fuel injection pump 14 of the engine 10 on the upper end side of the case member 50.

  With such a configuration, since the distance from the first outlet 814 to the pair of first inlets 52 and 52 can be increased and the first duct member 81 can be lengthened, the noise attenuation effect is improved. Thereby, it is possible to further improve the soundproof performance of the engine generator 1. Further, it is possible to efficiently cool the fuel injection pump 14 and improve the cooling performance of the engine generator 1.

  The second duct member 82 is provided on the lower side of the generator 20, and the second outlet 823 is provided so as to face the oil pan 12 of the engine 10.

  With such a configuration, it is possible to efficiently cool the oil pan 12 and improve the cooling performance of the engine generator 1.

  It should be noted that the opening shape, opening area, and numerical aperture of the first inlet, the second inlet, and the third inlet according to the present invention can introduce outside air that can sufficiently cool the engine generator. There is no particular limitation.

  Moreover, the 1st inlet which concerns on this invention can also be provided in the front side board of a case member, for example.

  In addition, the opening shape, opening area, and numerical aperture of the first outlet, the second outlet, and the third inlet according to the present invention are capable of deriving outside air that can sufficiently cool the engine generator. There is no particular limitation.

  Further, the number of plate-like members according to the present invention, the inclination angle, and the overlapping length are not particularly limited as long as the noise attenuation effect can be sufficiently ensured.

1 Engine Generator 10 Engine 12 Oil Pan 14 Fuel Injection Pump 16 First Cooling Fan (Cooling Fan)
20 Generator 41 Second inlet (inlet)
50 Case member 52 First introduction port (introduction port)
81 First duct member (duct member)
82 Second duct member (duct member)
814 First outlet (outlet)
815 First ventilation path (ventilation path)
815A center side (center side of ventilation path)
816 First plate member (plate member)
823 Second outlet (outlet)
824 Second ventilation path (ventilation path)
824A center side (center side of ventilation path)
825 Second plate member (plate member)

Claims (3)

  An engine having a cooling fan, a generator provided in parallel with the engine and driven by the engine, a case member for housing the engine and the generator, and a passage for cooling air provided in the case member A duct member that is provided with an introduction port that communicates with the outside and introduces outside air on one end side of the duct member, and on the other end side of the duct member , A lead-out port for leading out cooling air is provided, and a ventilation path is formed between the introduction port and the lead-out port in the duct member, and the ventilation path is formed from both sides of the inner peripheral wall of the ventilation path. A plurality of plate-like members that protrude obliquely from the inlet side toward the outlet port side toward the center side of the plurality of plate-like members are provided alternately in the direction in which the cooling air flows, and the protruding tips of the plurality of plate-like members An engine generator which is provided so as to overlap when viewed from a direction in which the cooling air flows.   The duct member is provided on one side of the engine in the case member, the introduction port is provided on a lower end side of the case member, and the outlet port is provided on the upper end side of the case member. The engine generator according to claim 1, wherein the engine generator is provided so as to face the fuel injection pump.   The engine generator according to claim 1, wherein the duct member is provided on a lower side of the generator, and the outlet port is provided so as to face an oil pan of the engine.

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