JPS6127566B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in soundproof boxes for motor generators.

Regarding the soundproof box of the engine generator, the maximum temperature inside the box is determined by the temperature rise allowed by the generator or its control equipment, and outside air is circulated to cool the box to suppress the temperature. As the demand for noise reduction increases, the structure of the air intake/exhaust duct must become more complex and large.Therefore, a duct design with low air resistance and high noise reduction is desired, but no good solution has been found in this contradictory theme. The current situation is that there is no such thing.

On the other hand, the temperature rise is mainly due to radiant heat from the engine and generator, and if heat exchange with the outside air can be solved, there will be a way to significantly reduce noise through hermetic sealing.

An object of the present invention is to provide a soundproof box for a motor generator that is small and simple in structure and can suppress temperature rise and reduce noise. Another feature is that one side of the box housing the generator is also used as a heat dissipation liquid tank, and the box is sealed to suppress the temperature rise inside the box.

The present invention is widely applicable to diesel generators.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1a is a front view showing the inside of a soundproof box according to an embodiment of the present invention, and FIG. 1b is a side view showing the inside.

Figures 1a and 1b show the entire soundproof box for a motor generator according to the present invention.

The soundproof box is roughly divided into two upper and lower compartments A and B. The lower compartment A is equipped with the engine 1, generator 2, anti-vibration rubber 3, fuel tank 4, battery 5, etc. is surrounded by a sound insulating wall β.

The upper section B incorporates a radiator 6 for cooling the engine, a motor fan 7 for cooling, and a control panel 8, and an inlet and an outlet for cooling air are provided on the circumferential surface.

A heat dissipation liquid tank 9 is provided between both sections A and B, and a fin 10 or a heat pipe 11 is provided on the surface of this liquid tank 9. The liquid tank 9 is filled with water, antifreeze, or oil as a cooling liquid. Further, a baffle plate 13 is provided on the lower section A side of the liquid tank to effectively guide wind. A small cooling fan 12 is attached to the engine 1. The heat dissipation liquid tank 9 is equipped with fins or heat pipes on its upper and lower surfaces at positions and sizes that are structurally permissible. 14 is a muffler.

The operation in the case of the above configuration will be described.

As the engine 1 is operated, the engine 1 is cooled by a cooling fan 7 and a radiator 6 driven by electric power generated by the generator 2. The radiant heat of the engine 1 and the cooling air of the generator 2 are guided by the small cooling fan 12 of the engine to the baffle plate 13, guided to the lower part of the heat dissipation liquid tank 9, and circulated in the lower section A.

The amount of heat in the lower section A is led to the heat dissipation liquid tank 9 through the fin 10 or the heat pipe 11, and is transferred to the upper section B by the cooling motor fan 7 as indicated by the arrow α.
Heat is released to the atmosphere with the help of cooling air that flows in from the inlets on both sides of the radiator and flows out to the outlet on the end face on the radiator 6 side.

As described above, the present invention has the following effects.

Since cooling in the lower compartment A does not require direct introduction of outside air, both the upper and lower compartments A and B are reliably isolated, and the heat dissipation liquid tank 9 serves as a sound insulating wall due to the mass effect of the cooling liquid. .

As a result, the suction and exhaust ducts are omitted, making it more compact and reducing noise. In addition, it is sufficiently profitable in terms of cost.

In the above embodiment, the sound insulating wall that also serves as a heat exchanger is formed on one side of the compartment in which the motor generator is accommodated, but the wall is not limited to only one side.

Alternatively, a radiator cooling method may be used in which the fins or heat pipes on both the upper and lower surfaces are omitted and a heat dissipation liquid tank is used as an intermediary.

[Brief explanation of the drawing]

FIG. 1a is a front view showing the inside of a soundproof box according to an embodiment of the present invention, and FIG. 1b is a side view showing the inside. 1... Engine, 2... Generator, 3... Anti-vibration rubber, 4... Fuel tank, 5... Battery, 6...
Radiator, 7... Cooling motor fan, 8...
Control panel, 9... heat dissipation liquid tank, 10... fin,
11... heat pipe, 12... small cooling fan, 13... baffle plate, 14... muffler, A... lower section, B... upper section.

Claims (1)

[Claims] 1 The box body is divided into upper and lower parts, and the lower circumferential surface is surrounded by a sound insulating wall to accommodate the generator and the engine that drives the generator, and the upper circumferential surface is provided with an inlet/outlet for cooling air. An upper section is provided to accommodate the radiator of the engine and a cooling fan driven by the electric power of the generator, and the above-mentioned both sections are cut off and the inside is filled with a cooling liquid, so that the air in the above-mentioned both sections and the cooling liquid are separated. A heat dissipation liquid tank is provided with a heat exchange part for exchanging heat with the heat dissipation liquid tank and forms a sound insulating wall, and air is circulated in the lower compartment along the heat dissipation liquid tank via a fan that is provided in the lower compartment and is driven by the motor. A soundproof box for a motor generator, characterized by being equipped with a wind guide plate.