EXPANSION APPARATUS AND REFRIGERANT CYCLE OF VEHICLE AIR CONDITIONER USING THE SAME
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United States of America Patent
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Issued Date -
Jul 7, 2016
app pub date -
Nov 17, 2015
filing date -
Nov 17, 2015
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Abstract
To provide an expansion apparatus capable of reliably producing an effect of reducing refrigerant flow noise and a refrigerant cycle of a vehicle air conditioner using the expansion apparatus. In an expansion apparatus in which a valve body of a refrigerant flow rate adjustment mechanism is accommodated in a valve chest of a main body to which a refrigerant is led, a first narrow portion is provided between a lead-in passage and the valve chest, and a second narrow portion having a flow passage area smaller than that of the first narrow portion is provided between the valve chest and a lead-out passage, the valve chest is formed so as to have a space around the valve body and the first narrow portion is formed so as to face the space around the valve body, so that the refrigerant led to the valve chest from the first narrow portion flows toward the second narrow portion through the space around the valve body without passing through a coil spring.
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