JP3426712B2 - Cooling air intake structure of power generator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outside air suction structure applied to internal cooling and ventilation of a power generator. 2. Description of the Related Art A first prior art power generator will be described with reference to FIGS. FIG. 5 is an overall view of a power generation device of a first conventional example, and FIG. 6 is a diagram of a soundproofing / muffling structure of the power generation device of the first conventional example.
Openings for introducing outside air are provided at various locations as shown in FIG. In the figure, 27 is urethane foam attached as a sound absorbing material, 28 is a partition, 29 is a louver, and 30 and 31 are hoods. The structure shown in FIG. 6 can be disassembled for attaching the urethane foam 27 to the inner surface of the air passage. The operation of the conventional example will be described. Louver 29
Acts to prevent rainwater from entering through the opening, but the actual passage area relative to the surface area of the opening, that is, the opening ratio is 70% or less. The hoods 30 and 31 are effective in preventing rainwater from dripping into the opening, but increase the overall length when the power generator is transported by a vehicle or the like. The opening shown in FIG. 6 (a) is the main intake structure of the device, but the entire width of the device is divided into two to form an air passage, and the surface area of the urethane foam as the sound absorbing material is limited, so that the noise reduction effect is small. . The hood 30 is effective for blocking noise from the inside of the apparatus and reducing noise at a long distance, but immediately below the control device operation surface 38, the ear noise increases, and the hood 30 is located at the foot of the operator. And impair operability. There are drawbacks such as an increase in cost due to the dispersion of the openings, an increase in the size of the device due to the hood, and a decrease in operability. A second conventional example will be described with reference to FIG. FIG.
FIG. 7A is a perspective view of a main intake structure of a second conventional example, FIG. 7A is a perspective view of a main intake structure of the second conventional example, and FIG.
It is EE sectional drawing of (a). The opening 40 is provided with a louver or a rectangular slit for preventing rainwater and foreign matter from entering. 41 is a drainer, 42 is a drainage structure, and 27 is urethane foam attached. The occupied height H for soundproofing and sound insulation is about twice the opening height h. The operation of the second conventional example will be described. The outside air enters through the opening 40, and the louver or the rectangular slit prevents rainwater and foreign matter from entering. The drainer 41 serves both as sound insulation and draining rainwater. The outside air is 18 as indicated by the arrow.
Turn 0 degrees and enter the device backward and downward. The drainage structure 42 catches and drains rainwater that enters through the sound insulation and the opening 40. The sound absorbing material 27 absorbs noise in the device. The occupied height H for the soundproofing / muffling structure is about twice as large as the opening height h, resulting in a reduction in the internal space of the device or an increase in the overall height of the device. Further, since the air passage is short and there is no partition at the opening, the area for attaching the sound absorbing material is small and the sound absorbing effect is limited. [0007] In operation, a power generator requires a large amount of fresh outside air for combustion and cooling of the internal combustion engine and cooling of the generator. The combustion air of the engine mainly changes in output and exhaust temperature due to temperature, and the cooling air for the generator is supplied as low temperature as possible due to the cooling of windings and the limitation of temperature rise. Good to do. [0008] The opening for inhaling the outside air of the device also serves as a path for leakage of noise generated by the engine and the generator to the outside. In order to reduce the noise of the device, a soundproof and silencing structure is indispensable at the opening. It is. The soundproofing / muffling structure of the opening does not interfere with the space occupied by the device mounted inside the device, and is preferably as small as possible to reduce the size of the entire device. [0009] If the openings are distributed around the apparatus, the cost is increased. When the apparatus is installed outdoors, a structure for preventing rainwater or large foreign matter from entering the opening and harmfully acting on the apparatus should be provided at a large aperture ratio and at a low cost as much as possible. In order to completely prevent rainwater from entering through the opening, high cost and large size of the apparatus or deterioration of workability of disassembly and assembling are caused. Wastewater treatment is good. A soundproofing and silencing structure that can maintain a common structure at low cost for the required level of noise reduction of the device is preferable. It is an object of the present invention to satisfy the above-mentioned requirements, to directly introduce outside air, to easily incorporate the air, to be able to change according to the demand for low cost and low noise, to maintain commonality, to have good weather resistance, and to improve foreign matters from the openings. It is an object of the present invention to provide a cooling air intake structure for a power generation device having a large aperture ratio by preventing intrusion of air. [0012] The present invention achieves the above object.
The generator (2), the engine (1), and the radiator (3) are housed inside the enclosure (12), and are opened at the top of the enclosure .
A first opening for air intake (42);
The first opening (42)
Pass air through the air cleaner (4) and radiator (3).
A first cell-type silencing structure (10) and the enclosure
Second openings for air intake opened at left and right portions of the air conditioner
(43) provided on left and right portions of the enclosure.
The air from the second opening (43) to the generator (2).
A second cell type silencing structure (11) passing through the cooling air inlet side;
And characterized in that it comprises a. The air intake provided above the engine in the side plate on the generator side of the enclosure has a cell type silencing structure, which prevents foreign substances and rainwater from entering, and prevents internal noise from leaking outside. , Intake air for combustion and cooling of the internal combustion engine of the device,
Separately, the air intake provided to the lower side of the generator has a cell type silencing structure, which prevents foreign substances and rainwater from entering,
Prevent internal noise from leaking out and introduce outside air near the generator. The cell type silencing structure has sufficient silencing characteristics and opening area without enlarging the overall width and height of the device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a power generator according to a first embodiment of the present invention, FIG. 2 is a diagram of a cooling air intake structure of the first embodiment according to the present invention, and FIG. 3 is rainwater of the first embodiment according to the present invention. FIG. In the figure, 1 is a diesel engine, 2 is a generator,
Reference numeral 3 denotes a radiator, 4 denotes an air cleaner opened in the apparatus, 5 denotes a cooling air outlet, and 6 denotes an exhaust silencer, all of which are known elements of an engine power generator. 7 is a control device operation surface,
Reference numeral 8 denotes a circuit breaker, and 9 denotes an instrument panel, all of which are provided on a side plate on the generator side of the enclosure. The outside air entering through the upper opening 42 passes through the cell type silencing structure 10, and is partially sucked into the air cleaner 4, and the rest flows through the apparatus and reaches the radiator 3. The outside air that has entered through the left and right openings 43 passes through the cell-type silencing structure 11, and a part of the outside air is sucked through the cooling air suction hole of the generator 2, and the rest flows through the device and reaches the radiator 3. The air that has reached the radiator 3 is discharged to the atmosphere from the cooling air outlet 5 through the radiator 3 by the blower fan. Reference numeral 12 denotes an enclosure provided with openings collectively, and reference numeral 22 denotes a ceiling of the enclosure. 13, 14,
Reference numerals 15 denote draining plates, which are inclined outward. 16 is the jacket 1
Reference numeral 2 denotes a reinforcing plate, and reference numerals 17 and 18 denote glass cells of an upper cell type silencing structure, each of which is made of a glass fiber plate. 2
Reference numeral 1 denotes an air inflow hole from the central opening. 20,
21 communicates with left and right openings 43. FIG. 3A is a view in which a silencing cell is incorporated in the jacket 12 and the ceiling 22 of the jacket, in which a rectangular hole in the front of the opening is removed, and FIG. 3B is a view in FIG. 2), the two-dot chain line in the figure indicates the shallowest inflow path of rainwater that can be received by the draining plates 13 and 14, and the arrow indicates the flow of rainwater discharged by the inclination of the draining plates 13 and 14. Reference numeral 23 denotes a weir that collects rainwater collected at the innermost part of the jacket 12, and reference numeral 24 denotes a drainage structure. FIG. 3C is a view of the lower part of the drainage structure 24. 25
Is a seal for preventing intrusion of water from outside the joint between the jacket 12 and the ceiling 22 of the jacket and dripping into the inside of the apparatus, and 26 is a ceiling 2 for the jacket.
2 shows a drainage structure in FIG. FIGS. 3 (c) and 3 (d) are structural views of drain holes provided at both ends of the upper opening 42 of FIG. 3 (a), and arrows indicate the direction of rainwater flow. FIG. 3 (d) is a line DD of FIG. 3 (c).
It is sectional drawing. The operation of the first embodiment will be described. The openings 42 provided in the upper part of the apparatus are arranged in a double row with cell-shaped ducts, and the ends are opened near the intake holes of the air cleaner 4 of the engine 2 to supply fresh outside air. Left and right cells 1 on the operation surface side of the device
In 9, outside air is introduced from the upper opening 43, and the lower part opens near the generator cooling air inlet in the apparatus to supply fresh air. The opening is defined by a rectangular slit to prevent foreign matters larger than the slit from entering. Drainer 13,1
The drains 4 and 15 receive the rainwater that has entered through the slit and drain the water to the outside through the opening. Since the draining plate is inclined outward, drainage is ensured even when the apparatus is installed at an angle. The weir 23 and the drainage structure 24 drain the rainwater that has entered the back of the draining plates 13 and 14 at a high speed.
Since the glass fiber plate cell has sufficient rigidity, a support structure is not required, the shape can be freely formed, and the weather resistance is better than urethane foam. A second embodiment according to the present invention will be described with reference to FIG. 4 (a), (b) and (c) are diagrams of the cell of the second embodiment according to the present invention, and FIG. 4 (d) is a diagram of the jacket of the second embodiment according to the present invention. (e) and (f) are views of the opening of the louver. The operation of the second embodiment will be described. FIG.
(A) is a diagram of a cell that reduces the silencing effect of the upper silencing cell,
FIG. 4B is a diagram for increasing the silencing effect. FIG. 4 (c)
Are the left and right cells that increase the silencing effect. The louver aperture ratio is represented by M / L or M '/ L. FIG. 4D integrates the jacket 12 and the ceiling 22 of the jacket in the first embodiment, and eliminates the need for the seal 25, the drainage structure 24, and the drainage structure 26. The noise attenuating effect of the cell type sound deadening structure is determined by the length and aspect ratio of the side of the rectangular cross section, the length of the air flow path, and the sound deadening performance of the sound absorbing material. The sound-absorbing material glass fiber plate of the present invention has better sound-deadening performance than urethane foam,
By assembling and forming into a square shape using a plate material of appropriate density, it can have rigidity itself.Therefore, there is no need for a partition structure on the device side to hold the sound absorbing material in a square shape, making it easy to assemble. A low-cost cell-type silencing structure has been made possible. Further, since the cell type silencing structure of the present invention does not require a partition structure of the device, it is easy to divide the partition so as to change the sectional shape of the cell according to the degree of noise reduction of the device. Can maintain the commonality of The glass fiber plate used for the cell is inorganic and has good weather resistance, and further high weather resistance specifications such as a plate material using a highly water-resistant binder, a surface coating or a glass fiber cloth coating have been widely used. It is superior to urethane foam. In the structure for preventing the invasion of foreign matter in the section formed by the rectangular hole in the opening, the opening ratio exceeds the value of the louver although the opening thickness exceeds the value of the louver although the thickness differs depending on the thickness of the jacket of the device for forming the opening and the size of the hole. The air passage is determined by the internal passage area, that is, the drain plate and the cell cross section. The drain plate according to the present invention receives the infiltrated rainwater, collects it, and drains it. In the louver, it is necessary to increase the number of sheets or increase the depth width, which is expensive. The opening at the upper part of the power generator introduces outside air into the vicinity of the air suction hole of the engine air cleaner through the cell type silencing structure, so that the temperature of the engine combustion air can be close to the outside temperature. Since the left and right openings and the silencing structure introduce outside air to the vicinity of the generator cooling air intake hole, cooling air equivalent to the outside air temperature can be supplied. The opening at the lower part of the control device is an auxiliary means for communicating with the left and right silencing structures to make the cross-sectional area of the silencing cell effective.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view of a power generator according to a first embodiment of the present invention. FIG. 2 is a cooling air intake structure diagram of a first embodiment according to the present invention. FIG. 3 is a view showing a rainwater discharge structure according to a first embodiment of the present invention. FIG. 4 is a cooling air intake structure diagram of a second embodiment according to the present invention. FIG. 5 is an overall view of a power generation device of a first conventional example. FIG. 6 is a diagram showing a cooling air intake structure according to a first conventional example. FIG. 7 is a diagram showing a cooling air intake structure according to a second conventional example. [Description of Signs] 1 ... Diesel engine, 2 ... Generator, 3 ... Radiator, 4
... air cleaner, 5 ... cooling air outlet, 6 ... exhaust silencer,
7: control device operation surface, 8: circuit breaker, 9: instrument panel, 1
0: Cell type silencing structure, 11: Cell type silencing structure, 12: Jacket, 13: Drain plate, 14: Drain plate, 15: Drain plate, 16
... reinforcing plate, 17 ... cell, 18 ... cell, 19 ... cell, 20
... introduction hole for outside air, 21 ... introduction hole for air, 22 ... ceiling of jacket, 23 ... weir, 24 ... drainage structure, 25 ... seal, 26 ...
Drainage structure, 42 ... Upper air intake (upper opening), 43 ...
Lower air inlets (left and right openings), 44: arrow direction of air flow above the engine, 45: arrow direction of air flow below the generator.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-121810 (JP, A) JP-A 4-125620 (JP, U) JP-A 63-150020 (JP, U) (58) Investigation Field (Int.Cl. ⁷ , DB name) F01P 11/12 F02B 63/04 F02B 77/13

Claims (1)

(57) Claims 1. A generator (2), an engine (1) and a radiator (3) housed inside an enclosure (12) , wherein an upper part of the enclosure is provided. Opened to
A first opening for air intake (42);
The first opening (42)
Pass air through the air cleaner (4) and radiator (3).
A first cell-type silencing structure (10) and the enclosure
Second openings for air intake opened at left and right portions of the air conditioner
(43) provided on left and right portions of the enclosure.
The air from the second opening (43) to the generator (2).
A second cell type silencing structure (11) passing through the cooling air inlet side;
Cooling air intake structure of the power generation device and characterized in that it comprises a.