Air-conditioning equipment for vehicles

• US 6,071,070 A
• Filed: 04/02/1997
• Issued: 06/06/2000
• Est. Priority Date: 08/05/1996
• Status: Expired due to Fees

• Current Assignee: Japan Climate Systems Corporation (Visteon Corporation)
• Original Assignee: Japan Climate Systems Corporation (Visteon Corporation)
• Inventors: Yamamoto, Kazuhiro, Hakata, Toshiki, Otani, Satoshi
• Primary Examiner(s): Joyce, Harold
• Application Number:
  US08/825,731
• Time in Patent Office: 1,161 Days
• Field of Search: 62/244, 415/53.1, 415/53.3, 454/137, 454/155
• US Class Current: 415/53.1
• CPC Class Codes: B60H 1/00371 for vehicles carrying large numbers of passengers, e.g. buses
• CPC Class Codes: B60H 1/00457 Ventilation unit, e.g. combined with a radiator control systems for ventilators B60H1/00828
• CPC Class Codes: B60H 1/00471 The ventilator being of the radial type, i.e. with radial expulsion of the air
• CPC Class Codes: F04D 17/04 of transverse-flow type
• CPC Class Codes: F04D 29/422 Discharge tongues F04D17/04 takes precedence

Abstract

In a casing (11), a rear guide (23) is formed above a cylindrical impeller (13) and a stabilizer (24) is formed below the impeller. A minimum gap dimension between the cylindrical impeller (13) and the stabilizer (24) on the outlet port (17) side has a value of 14% to 24% of the outer diameter of the cylindrical impeller (13). An angle between a straight line connecting the center of rotation of the cylindrical impeller (13) and a minimum gap position on the outlet port (17) side of the stabilizer (24) and the horizontal plane has a value of 38° to 43°. A minimum gap dimension between the cylindrical impeller (13) and the stabilizer (24) on the inlet port (16) side has a value of not smaller than 7% of the outer diameter of the cylindrical impeller (13). An angle between a straight line connecting the center of rotation of the cylindrical impeller (13) and a minimum gap position on the inlet port (16) side of the stabilizer (24) and the vertical plane has a value of 11° to 15°.

Claims

1. Air-conditioning equipment for vehicles, comprising a casing having an inlet port and an outlet port arranged in positions approximately opposite from each other and being internally provided with a cylindrical impeller arranged horizontally perpendicularly to a direction in which said inlet port and said outlet port are connected, a rear guide formed above said cylindrical impeller and a stabilizer formed below said cylindrical impeller, wherein

a minimum gap dimension t1 between said cylindrical impeller and said stabilizer on the outlet port side,

an angle between a straight line connecting a center of rotation of said cylindrical impeller and a position of the minimum gap dimension t1 on the outlet port side of said stabilizer and a horizontal plane,

a minimum gap dimension t2 between said cylindrical impeller and said stabilizer on the inlet port side,

an angle between a straight line connecting the center of rotation of said cylindrical impeller and a position of the minimum gap dimension t2 on the inlet port side of said stabilizer and a vertical plane have values chosen to prevent occurrence of a whistle noise and a surging noise,

further wherein said dimension t1 is not smaller than 14% and not greater than 24% of an outer diameter of the cylindrical impeller,

said angle "a" is not smaller than 38°

and not greater than 43°

,

said dimension t2 is not smaller than 7% and not greater than 13% of the outer diameter of the cylindrical impeller, and

said angle "b" is not smaller than 11° and

not greater than 15°

.

2. The air-conditioning equipment for vehicles according to claim 1, wherein

said stabilizer has a concave surface which is centered about a position below the center of rotation of the cylindrical impeller in a middle portion except for the outlet port side and the inlet port side and has an arc-like section shape having a radius of curvature smaller than the radius of the cylindrical impeller and a gap of 15% to 25% of the outer diameter of the cylindrical impeller.

3. The air-conditioning equipment for vehicles according to claim 1, wherein

said stabilizer has a sectionally arc-shaped top portion having a radius of curvature of 5 to 23% of the outer diameter of said cylindrical impeller on the outlet port side.

4. The air-conditioning equipment for vehicles according to claim 1, wherein

said stabilizer has a concave surface which is centered about a position below the center of rotation of the cylindrical impeller in a middle portion except for the outlet port side and the inlet port side and has an arc-like section shape having a radius of curvature smaller than the radius of the cylindrical impeller and a gap of 15% to 25% of the outer diameter of the cylindrical impeller.

5. The air-conditioning equipment for vehicles according to claim 1, wherein

said dimension t1 is not smaller than 14% and not greater than 24% of an outer diameter of the cylindrical impeller,

said angle "a" is not smaller than 38°

and not greater than 43°

,

said dimension t2 is not smaller than 7% and not greater than 13% of the outer diameter of the cylindrical impeller, and

said angle "b" is not smaller than 11° and

not greater than 15°

,

said stabilizer has a sectionally arc-shaped top portion having a radius of curvature of 5 to 23% of the outer diameter of said cylindrical impeller on the outlet port side.

6. The air-conditioning equipment for vehicles according to claim 1, wherein

said stabilizer has a concave surface which is centered about a position below the center of rotation of the cylindrical impeller in a middle portion except for the outlet port side and the inlet port side and has an arc-like section shape having a radius of curvature smaller than the radius of the cylindrical impeller and a gap of 15% to 25% of the outer diameter of the cylindrical impeller, and

said stabilizer has a sectionally arc-shaped top portion having a radius of curvature of 5 to 23% of the outer diameter of said cylindrical impeller on the outlet port side.

7. The air-conditioning equipment for vehicles according to claim 1, wherein

said stabilizer has a concave surface which is centered about a position below the center of rotation of the cylindrical impeller in a middle portion except for the outlet port side and the inlet port side and has an arc-like section shape having a radius of curvature smaller than the radius of the cylindrical impeller and a gap of 15% to 25% of the outer diameter of the cylindrical impeller, and

said stabilizer having a sectionally arc-shaped top portion having a radius of curvature of 5 to 23% of the outer diameter of said cylindrical impeller on the outlet port side.