JP2010106696A - Engine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine generator facilitating maintenance work. <P>SOLUTION: In the engine generator 1 including an engine 30, a generator 40 driven by the engine 30 and generating electric power, an inverter 50 converting electric power generated by the generator 40 to alternating current and outputting the same, a control device 70 controlling the engine 30 and the generator 40, and a casing 10 holding such equipment therein, a base 12 including a hollow part 12a opening upward is provided at a bottom part of the casing 10, and a battery 20 is fitted in the hollow part 12a of the base 12 and is disposed below the control device 70. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an engine generator in which an engine, a generator, and the like are installed in a casing.

  Conventionally, an engine generator having an engine, a generator, an inverter, and the like has been publicly known. In the engine generator, the generator is driven by the power of the engine to generate electricity. Then, the electric power generated by the generator is rectified by the inverter and then converted into a desired frequency. In this way, AC power can be output from the engine generator.

Among such engine generators, there is one in which all devices such as an engine, a generator, and an inverter are installed in a casing (for example, Patent Document 1).
JP 2005-299601 A

  In conventional engine generators, since all the devices are installed in the housing, there is no room between the devices, and maintenance work cannot be easily performed. Moreover, the electrical components are likely to break down due to the dilute sulfuric acid gas generated from the battery, and the maintenance frequency is high.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine generator that facilitates maintenance work.

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

  In claim 1, an engine, a generator that is driven by the engine to generate electric power, an inverter that converts the electric power generated by the generator into an alternating current and outputs, and control of the engine and the generator are controlled. An engine generator including a control device to perform and a housing in which these devices are provided includes a base having a recess opening upward at the bottom of the housing, and a battery is fitted in the recess of the base , Arranged below the control device.

  According to a second aspect of the present invention, a partition plate is provided at the bottom of the exterior member of the control device, and is arranged between the control device and the battery.

  In Claim 3, the side part of the said housing | casing provided the cooling air introduction port for taking in outside air as the cooling air inside the said housing | casing, and has arrange | positioned below the said partition plate in the vicinity of the said battery. Is.

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

  According to the first aspect of the present invention, it is possible to increase the space between the battery and the control device by disposing the battery at a lower position in the casing than when the battery is disposed on the upper surface of the base. Therefore, a sufficient maintenance space can be secured, and maintenance work is facilitated.

  According to the second aspect of the present invention, it is possible to block the dilute sulfuric acid gas from the battery to the control device by the partition plate while ensuring a sufficient maintenance space between the battery and the control device. Therefore, it is possible to prevent a failure due to corrosion of electrical components of the control device, and to reduce the maintenance frequency.

  According to the third aspect of the invention, it is possible to easily diffuse the dilute sulfuric acid gas generated from the battery by the outside air sucked from the cooling air inlet. Therefore, it is possible to prevent a failure due to corrosion of electrical components of the control device, and to reduce the maintenance frequency.

  Next, embodiments of the invention will be described.

  First, an overall configuration of an engine generator 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. Note that the direction of the arrow F in FIGS. 1 and 2 will be described as the forward direction.

  The engine generator 1 is an inverter type engine generator. The engine generator 1 includes a casing 10, an engine 30, a generator 40, an inverter 50, a cooling fan 33, a radiator 34, a fuel tank 60, an air cleaner 31, a muffler 32, a control device 70, a battery 20, and the like.

  The casing 10 is an exterior member of the engine generator 1 and is provided with various devices such as the engine 30 and the generator 40 inside. The housing 10 includes a base 12 provided at the bottom and a cover 11 provided at the top.

  The engine 30 is a drive source for each device inside the housing 10. The engine 30 is disposed substantially at the center inside the housing 10 and is supported on the upper surface of the base 12 via a vibration isolation member (not shown).

  The generator 40 is driven by the power of the engine 30 to generate power. The generator 40 is disposed in front of the engine 30 and behind the battery 20.

  The inverter 50 rectifies the electric power generated by the generator 40, converts it to AC power having a predetermined frequency, and outputs it. The inverter 50 is disposed on the right front side of the engine 30 and is disposed in the right side portion of the housing 10, that is, in the vicinity of the front side of the right side plate 11 d (see FIG. 6) of the cover 11.

  The cooling fan 33 takes outside air into the housing 10. The cooling fan 33 is disposed behind the engine 30 inside the housing 10 and in front of the radiator 34, and is driven by the power of the engine 30.

  The radiator 34 cools the cooling water circulating in the engine 30. The radiator 34 is disposed behind the cooling fan 33 inside the housing 10 and above the fuel tank 60. A water supply port 34 a is provided at the upper portion of the radiator 34. The radiator 34 is connected to the engine 30 via a communication pipe (not shown).

  The fuel tank 60 is for storing fuel to be supplied to the engine 30. The fuel tank 60 is disposed behind the engine 30 and in the vicinity of the lower portion of the radiator 34.

  The air cleaner 31 purifies outside air and supplies it to the engine 30. The air cleaner 31 is disposed on the left front side of the engine 30 and in the vicinity of the upper side of the battery 20, and is connected to the engine 30 via the intake pipe 35.

  The muffler 32 silences the exhaust sound of the engine 30. The muffler 32 is disposed behind the radiator 34 and above the fuel tank 60, and is connected to the engine 30 via the exhaust pipe 36.

  A tail pipe 32a extends upward from the muffler 32 to the ceiling portion of the housing 10, that is, near the upper plate 11b of the cover 11, and is opened so as to face the outside at the extended end portion. The exhaust gas from the engine 30 can be discharged from the tail pipe 32a to the outside of the housing 10 via the exhaust pipe 36 and the muffler 32.

  The control device 70 controls the engine 30 and the generator 40. The control device 70 is disposed in front of the generator 40 of the housing 10 and above the battery 20, and is disposed in the front side portion of the housing 10, that is, in the vicinity of the front side of the front plate 11 a of the cover 11.

  The control panel 71 performs operations such as starting the engine generator 1 and displays the operating state. The control panel 71 is disposed in front of the control device 70 and exposed to the outside at the upper part of the front side plate 11 a of the cover 11. The control panel 71 is provided with switches for operating the engine generator 1 and a monitor 71a for displaying the operation status.

  The battery 20 supplies power to a starter (not shown), the control unit of the inverter 50, the control panel 71, and the like when the engine 30 is started. The battery 20 is disposed in the front portion of the base 12 inside the housing 10.

  In this way, in the engine generator 1, each device is provided inside the housing 10. Then, fuel is supplied from the fuel tank 60, air is supplied via the air cleaner 31, and the engine 30 is started. The generator 40 is driven by the power of the engine 30 to generate power. After the electric power generated by the generator 40 is rectified by the inverter 50, it is converted into AC power having a predetermined frequency and output.

  Next, the configuration of the housing 10, particularly the front part thereof, will be described.

  The housing 10 includes the cover 11 and the base 12 as described above. The cover 11 is disposed above the base 12 and is provided so as to cover the base 12 from above. In this covered state, a space for storing each device such as the engine 30 and the generator 40 is formed above the base 12 and inside the cover 11.

  The cover 11 includes a front side plate 11a, a rear side plate, an upper plate 11b, a left side plate 11c, a right side plate 11d, and the like, and is configured as a box-shaped member that opens the bottom side (opens downward). At the lower right side of the front side plate 11 a of the cover 11, a cooling air introduction port 15 composed of an opening group opening in the front-rear direction is provided.

  In addition, a cooling air discharge port 16 including a group of openings that open in the vertical direction is provided at the rear of the upper plate 11 b of the cover 11. The left side plate 11c of the cover 11 is provided with an opening for maintenance work, and an opening / closing door 18 that can open and close the opening is provided rotatably.

  When the cooling air passage 5 is formed between the cooling air inlet 15 and the cooling air outlet 16 inside the housing 10 and the cooling fan 33 is driven by the engine 30, the outside air is used as the cooling air. The air is taken into the housing 10 from the cooling air inlet 15 and then flows through the cooling air passage 5 and can be discharged from the cooling air outlet 16 to the outside of the housing 10.

  As shown in FIG. 3, the base 12 includes a front member 14F, a rear member 14R, an intermediate member 14C, channel members 17a and 17b, left and right frames 13L and 13R, and the like.

  The front member 14F, the rear member 14R, and the middle member 14C are plate members that form a part of the bottom portion of the base 12 as a front portion, a rear portion, and a front-rear center portion of the base 12, respectively.

  The channel members 17a and 17b are substantially U-shaped in a side sectional view and are arranged to open downward. The channel members 17a and 17b, the front member 14F, the rear member 14R, and the middle member 14C are each integrally formed by extending in the left-right direction and arranged in parallel with each other and appropriately connecting with adjacent ones in the front-rear direction. The

  The left and right frames 13 </ b> L and 13 </ b> R are frame members arranged from the front end portion to the rear end portion of the base 12 at the left and right end portions of the base 12, respectively. The frames 13L and 13R are provided with portions that protrude downward in the front portion, the rear portion, and the center portion, respectively, with the same height. The side ends of the channel members 17a and 17b are fixed between these protruding portions, and the entire base 12 is supported by the channel members 17a and 17b and the protruding portions.

  A front member 14F, a rear member 14R, and a middle member 14C are interposed between the left and right frames 13L and 13R. In the base 12, the front member 14F, the channel member 17a, the middle member 14C, the channel member 17b, and the rear member 14R are arranged in this order from the front ends of the frames 13L and 13R toward the rear.

  As shown in FIGS. 3 and 4, the base 12 is provided with a recess 12 a for supporting the battery 20. The recess 12a is constituted by a front member 14F and a front portion of the channel member 17a adjacent to the front member 14F in the front-rear direction. The front member 14F is formed in a stepped shape with the front side being the upper step portion 14Fa and the rear side being the lower step portion 14Fb in a side sectional view. The upper surface of the upper step portion and the upper surface of the lower step portion of the front member 14F are horizontal surfaces and extend in the left-right direction.

  The lower step portion 14Fb of the front member 14F extends in the front-rear direction with a predetermined front-rear width, and abuts the upper and lower middle portions of the front side surface of the channel member 17a at the rear end surface. The height position of the upper surface of the channel member 17a is set to be approximately the same as the height position of the upper surface of the upper stage of the front member 14F. Thus, the height position of the upper surface of the lower step portion 14Fb of the front member 14F is set lower than the height position of the upper step portion of the front member 14F and the upper surface of the channel member 17a.

  As a result, in the front portion of the base 12, the rear side that becomes the lower step portion 14Fb of the front member 14F, that is, between the upper step portion 14Fa of the front member 14F and the channel member 17a, is recessed downward, in other words, opened upward. A recess 12a is formed. The front and rear and left and right widths of the opening portion of the recess 12a are set to be larger than the front and rear width and left and right widths of the battery 20 installed inside the housing 10, and the battery 20 can be fitted into the recess 12a.

  With such a configuration, the base 12 is provided with a recess 12 a for supporting the battery 20 on the front lower side inside the housing 10. And when arrange | positioning inside the housing | casing 10, the battery 20 is engage | inserted from the upper part to the recessed part 12a, a lower part is accommodated in the recessed part 12a, and only an upper part is upwards with respect to the upper surface part 14Fa of the front member 14F It is supported by the base 12 in a state of protruding to the base.

  The front and rear and the left and right widths of the opening portion of the recess 12a may be any size as long as the battery 20 can be fitted, and is slightly larger than the front and rear and left and right widths of the battery 20 so that the position of the battery 20 can be maintained. It may be larger than this.

  Further, the vertical width of the opening portion of the recess 12a, that is, the step between the upper step portion 14Fa and the lower step portion 14Fb in the front member 14F can be arbitrarily set. In this embodiment, the vertical width is set to be smaller than the maximum vertical width of the frames 13L and 13R, and the front member 14F is not grounded at the lower step portion 14Fb.

  As shown in FIGS. 4, 5, and 6, the control device 70 is disposed above the battery 20 supported as described above, on the front upper side inside the housing 10. The control device 70 is attached to the front plate 11a by a control box 70a which is an exterior member, and is configured integrally with a control panel 71 provided on the top of the front plate 11a. A space 74 is formed inside the control box 70a, and electrical components such as a switch of the control device 70 and a breaker 70b are provided in the space 74 (see FIG. 6).

  A partition plate 73 is provided at the bottom of the control device 70. The partition plate 73 is set so that its front-rear width and left-right width are approximately the same as the front-rear width and left-right width of the control box 70 a of the control device 70, and is arranged between the control box 70 a and the battery 20. And the partition plate 73 is attached to the bottom part of the control box 70a, and closes the space 74 from the downward direction.

  With such a configuration, when the battery 20 is disposed below the control device 70, the partition plate 73 is a partition wall between the battery 20 and the control device 70, and the partition plate 73 controls the control device 70, specifically, the space 74. The electrical components such as the switch and the breaker 70b disposed in the battery 20 are reliably covered from the battery 20.

  Therefore, in the engine generator 1, when the dilute sulfuric acid gas 21 is generated from the battery 20 inside the housing 10, the dilute sulfuric acid gas 21 flows upward toward the control device 70, but the diverted sulfuric acid gas 21 flows to the partition plate 73 in the middle. It is blocked and it is prevented from reaching the space 74 where the electrical components such as the switch of the control device 70 and the breaker 70b are arranged. That is, the partition plate 73 prevents the dilute sulfuric acid gas 21 from entering the space 74 of the control device 70.

  As shown in FIGS. 4 and 5, the cooling air inlet 15 is provided in the front plate 11 a of the cover 11 as described above. The cooling air inlet 15 is arranged so that it does not overlap in front view with the partition plate 73 arranged just inside the upper part of the front plate 11a and the battery 20 arranged just inside the lower left part of the front plate 11a. 11a is provided below the partition plate 73 and in the vicinity of the battery 20.

  As shown in FIG. 6, a duct 19 is provided on the inner side of the lower right side of the front side plate 11 a so as to be aligned with the cooling air inlet 15 in a front view. The duct 19 communicates with the cooling air inlet 15 and communicates with the internal space of the housing 10. By this duct 19, when cooling air is taken into the housing 10 from the cooling air inlet 15, it is guided in an arbitrary direction in the internal space of the housing 10.

  With such a configuration, in the inside of the housing 10, the space that is immediately behind the multiple cooling air inlets 15..., That is, the space on the right side of the battery 20 below the partition plate 73, continues to the duct 19. An air passage 5 is formed. Thus, when the cooling fan 33 is driven, outside air is sucked as cooling air from the cooling air inlet 15 into the housing 10 through the duct 19, and then passes through the cooling air passage 5 near the battery 20. It is supposed to flow backward.

  Therefore, in the engine generator 1, when dilute sulfuric acid gas 21 is generated from the battery 20 inside the housing 10, the dilute sulfuric acid gas 21 flows from the battery 20 toward the cooling air passage 5 and is blocked by the partition plate 73. The diluted sulfuric acid gas 21 is guided by the partition plate 73 and flows toward the cooling air passage 5. Then, the dilute sulfuric acid gas 21 is carried while being diffused to the rear of the housing 10 on the cooling air flowing through the cooling air passage 5, and a plurality of cooling air discharge ports 16, 16. Discharged from.

  As described above, the engine generator 1 according to one embodiment of the present invention converts the engine 30, the generator 40 that is driven by the engine 30 to generate power, and the electric power generated by the generator 40 into alternating current. In an engine generator 1 including an inverter 50 that outputs power, a control device 70 that controls the engine 30 and the generator 40, and a casing 10 in which these devices are provided, the bottom of the casing 10 faces upward. It is assumed that a base 12 having a concave portion 12 a that is open is provided, the battery 20 is fitted into the concave portion 12 a of the base 12, and is disposed below the control device 70.

  As a result, the battery 20 is disposed at a lower position in the housing 10 as compared with the case where the battery 20 is disposed on the upper surface of the base 12, specifically, the upper step portion 14Fa of the front member 14F or the upper surface of the channel member 17a. It becomes possible to widen between 20 and the control apparatus 70 arrange | positioned above it. Accordingly, by rotating the open / close door 18 or the like, a sufficient maintenance space can be secured when performing maintenance work from the outside of the housing 10, and the inside of the housing 10, particularly in the vicinity of the installation portion of the battery 20, can be secured. Maintenance work becomes easy. Further, the overall height of the housing 10 can be suppressed.

  The engine generator 1 according to one embodiment of the present invention is also configured such that a partition plate 73 is provided at the bottom of the control box 70 a of the control device 70 and is disposed between the control device 70 and the battery 20.

  Accordingly, it is possible to block the dilute sulfuric acid gas 21 from the battery 20 toward the control device 70 by the partition plate 73 while ensuring a sufficient maintenance space between the battery 20 and the control device 70. Therefore, failure due to corrosion of electrical components such as the breaker 70b of the control device 70 can be prevented, and the maintenance frequency can be lowered.

  The engine generator 1 according to the embodiment of the present invention also has a cooling air inlet for taking outside air as cooling air into the front side portion of the housing 10, that is, the front plate 11 a of the cover 11. 15 is provided below the partition plate 73 in the vicinity of the battery 20.

  Thereby, the dilute sulfuric acid gas 21 generated from the battery 20 is easily diffused by the outside air sucked from the cooling air inlets 15, 15..., And is discharged from the cooling air outlets 16, 16. It becomes possible to do. Therefore, failure due to corrosion of electrical components such as the breaker 70b of the control device 70 can be prevented, and the maintenance frequency can be lowered. Further, the battery 20 is likely to hit the outside air sucked from the cooling air inlets 15, 15. Therefore, the battery 20 can be cooled by the outside air.

The perspective view which shows the structure outside the engine generator. The perspective view which shows the structure inside an engine generator. The figure which shows the structure of the base which makes the bottom part of the housing | casing in an engine generator. (A) is a perspective view which shows the structure of a base. (B) Sectional drawing which shows the structure of the front part of a base. The cross-sectional side view which shows the structure of the front part of an engine generator. The front view which shows the structure of the front part of an engine generator. The cross-sectional top view which shows the structure of the front part of an engine generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine generator 5 Cooling air passage 10 Case 12 Base 12a Concave 14F Front member 14Fa Upper stage 14Fb Lower stage 15 Cooling air introduction port 16 Cooling air discharge port 17a Channel member 20 Battery 21 Dilute sulfuric acid gas 30 Engine 40 Generator 50 Inverter 60 Fuel tank 70 Control device 70a Control box 71 Control panel 73 Partition plate

Claims (3)

  An engine, a generator driven by the engine to generate electric power, an inverter that converts the electric power generated by the generator into alternating current, and a control device that controls the engine and the generator; and An engine generator having a housing provided therein with a base having a recess opening upward at the bottom of the housing, and a battery fitted into the recess of the base, An engine generator characterized by being arranged in   2. The engine generator according to claim 1, wherein a partition plate is provided at a bottom portion of an exterior member of the control device and is arranged between the control device and the battery.   A cooling air introduction port for taking outside air as cooling air into the inside of the housing is provided at a side of the housing, and is disposed below the partition plate in the vicinity of the battery. Item 3. The engine generator according to Item 2.

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