Patent ID: 7903414
Filing Date: 2011-03-08
Classification: B60H,G01P

Abstract:
1. An air volume control module for controlling the rotational speed of a blower of a vehicular air conditioning apparatus, comprising: a circuit board including a control circuit for controlling the rotational speed of the blower; a heat sink connected to the circuit board and including a fin for radiating heat generated by the circuit board; and a base housing surrounding the circuit board, the heat sink being inserted in the base housing with the fin projecting from the base housing; wherein the base housing has an insertion opening for inserting the heat sink therethrough into the base housing, and includes a locking finger disposed adjacent to the insertion opening for locking the heat sink in the base housing, the base housing is mounted on the heat sink only by the locking finger, and either one of the base housing and the fin of the heat sink has a protective projection having a heightwise dimension greater than that of the locking finger.