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Forced cooling of vehicle air-conditioning blower motor with airflow regulating ribs

  • US 10,245,919 B2
  • Filed: 01/27/2016
  • Issued: 04/02/2019
  • Est. Priority Date: 02/05/2015
  • Status: Active Grant
First Claim
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1. A vehicle air-conditioning apparatus comprising:

  • a blower unit, the blower unit including;

    a scroll casing including a first wall having an intake port;

    a second wall facing the first wall; and

    a peripheral wall connecting peripheral edge portions of the first wall and the second wall, andan impeller rotatably provided in the scroll casing;

    a motor having a revolving shaft configured to rotate the impeller and to be mounted on the second wall;

    a blow-out flow channel provided between a bending end portion of the scroll casing and a tongue portion of the scroll casing; and

    a motor cooling air introduction chamber provided outside the tongue portion, wherein;

    the motor cooling air introduction chamber is in communication with the blow-out flow channel via an air intake port opening in a peripheral wall of the tongue portion facing the blow-out flow channel at a position more closer to the first wall side than an inner wall surface of the second wall,the blow-out flow channel is provided with a plurality of airflow regulating ribs comprising a first rib and a second rib intersecting a blow-out plane formed by a blow-out port and facing the peripheral wall provided with the air intake port,the plurality of airflow regulating ribs projects from an inner wall surface of the second wall and having a top portion in the blow-out flow channel, andthe plurality of airflow regulating ribs are arranged so that an upstream end of the first rib among the plurality of airflow regulating ribs is arranged at a position farther from the peripheral wall than a downstream end of the first rib provided the air intake port is located on the upstream side, the first rib approaching the peripheral wall from the upstream end to the downstream end,wherein the first rib defines a first angle with the blow-out plane and the second rib defines a second angle with the blow-out plane, andwherein the first angle is greater than the second angle.

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