Soundproof type water-cooled engine generator

• US 5,575,349 A
• Filed: 10/17/1994
• Issued: 11/19/1996
• Est. Priority Date: 10/19/1993
• Status: Expired due to Term

• Current Assignee: Denyo Kabushiki Kaisha
• Original Assignee: Denyo Kabushiki Kaisha
• Inventors: Tanaka, Toshiaki, Sato, Sanpei, Ikeda, Takatoshi
• Primary Examiner(s): Boehler, Anne Marie
• Assistant Examiner(s): YU, MIN SON
• Application Number:
  US08/323,879
• Time in Patent Office: 764 Days
• Field of Search: 180/296, 180/68.1, 180/68.2, 180/68.4, 180/69.2, 180/69.24, 180/89.2, 181/204, 181/224, 123/41.7
• US Class Current: 180/68.1
• CPC Class Codes: F02B 63/04 for electric generators
• CPC Class Codes: F02B 63/044 the engine-generator unit being placed on a frame or in an housing
• CPC Class Codes: F02B 77/13 Acoustic insulation

Abstract

A soundproof type water-cooled engine generator is constructed to guide an exhaust current of air from a cooling fan of a water-cooled engine to an independent hood-like shroud chamber, deaden the current sound through a muffler located under the shroud chamber, for improving the cooling performance. A water-cooled engine 2 and a generator 3 are accommodated in a soundproof bonnet 1. A panel wall 8 is provided close to a fan 7 equipped in the water-cooled engine. The panel wall serves to partition the soundproof bonnet 1 into an engine and generator chamber 11 and an exhaust processing chamber 12. The panel wall has a hole having the substantially same diameter as the fan 7. Around the outside of the hole, a shroud chamber 17 is independently provided in the exhaust processing chamber. The shroud chamber 17 is formed by a hood-like encircling wall 14. On the lateral side of the shroud chamber, a radiator 13 is located to stand upright. A muffler is located under an exhaust duct chamber 18 so that the exhaust is discharged from the upper portion of the exhaust duct chamber.

Claims

1. A soundproof water-cooled engine generator comprising:

a water-cooled engine;

a generator to be driven by said water-cooled engine;

a cooling fan connected to said engine for flowing a cooling current of air around said water-cooled engine and said generator;

a radiator arranged perpendicular to said cooling fan and fluidly connected to said water-cooled engine so as to receive cooling water therefrom, for cooling said cooling water using the cooling current of air from said cooling fan;

a shroud chamber having a shroud wall which shifts the cooling current from said cooling fan toward said radiator, provided between said cooling fan and said radiator for guiding the cooling current to said radiator and arranged so as to evenly distribute said cooling current across a front surface of said radiator;

a muffler connected to said water-cooled engine for receiving exhaust from said water-cooled engine, deadening exhaust sound, and discharging the exhaust;

an engine and generator chamber for accommodating said engine and generator;

an exhaust processing chamber for accommodating said radiator and muffler;

a panel wall having an air vent through which the cooling current of air passes to said shroud chamber, wherein the cooling current of air passed through said air vent is guided by said shroud chamber to meet said radiator, said radiator being perpendicular to said panel wall, said panel wall serving to partition said engine and generator chamber from said exhaust processing chamber;

said exhaust processing chamber being provided for forming such a ventilation path as guiding the cooling current of air from said air vent to said radiator in said exhaust processing chamber;

said muffler being provided in said exhaust processing chamber, and

said cooling fan moving the flow of air from said radiator to around said muffler.

2. The soundproof water-cooled engine generator according to claim 1, wherein said radiator provided in said exhaust processing chamber is vertically located in a manner that is perpendicular to said cooling fan and wherein said shroud chamber is formed with an opening for the fan at one end of the shroud chamber, and another opening perpendicular to the opening for the fan is located at another end of the shroud chamber to house the radiator.

3. The soundproof water-cooled engine generator according to claim 1, wherein said shroud chamber is located above said muffler.