Patent ID: 8302427
Filing Date: 2012-11-06
Classification: F25B,F28D

Abstract:
1. An evaporator comprising: an entry-side heat exchanger including: an exit-side heat exchanger including: wherein said entry-side heat exchanger and said exit-side heat exchanger are joined to form a two-layer structure with said entry-side heat exchanger on a leeward side and said exit-side heat exchanger on a windward side relative to a ventilating direction, said two-layer structure having a first end and a second end opposite said first end; wherein said upper entry-side tank has an inlet port at said first end of said two-layer structure for receiving a supply of the refrigerant, and said upper exit-side tank has an outlet port at said first end of said two-layer structure for discharging the refrigerant, said lower entry-side tank and said lower exit-side tank sharing a communication portion at said second end of said two-layer structure, said communication portion being configured to connect said entry-side heat exchanger to said exit-side heat exchanger so that, after the refrigerant flows through said entry-side heat exchanger from said inlet port, the refrigerant is guided to said exit-side heat exchanger via said communication portion and flows through said exit-side heat exchanger to said outlet port; wherein said entry-side heat exchanger is configured so that said plurality of entry-side heat exchange passages is divided into a first path for guiding the refrigerant from said inlet port in a vertical downward direction, a second path communicating with and downstream of said first path for guiding the refrigerant in a vertical upward direction, and a third path communicating with and downstream of said second path for guiding the refrigerant in a vertical downward direction to said communication portion; wherein said exit-side heat exchanger is configured so that said plurality of exit-side heat exchanger passages is divided into a fourth path for guiding the refrigerant from said communication portion in a vertical upward direction, a fifth path communicating with and downstream of said fourth path for guiding the refrigerant in a vertical downward direction, and a sixth path communicating with and downstream of said fifth path for guiding the refrigerant in a vertical upward direction to said outlet port; wherein a combined sectional area of all of said entry-side heat exchange passages of said first path is smaller than a combined sectional area of all of said exit-side heat exchange passages of said fifth path; and wherein a combined sectional area of all of said exit-side heat exchange passages of said sixth path is smaller than a combined sectional area of all of said entry-side heat exchange passages of said second path.