Patent ID: 6701744
Filing Date: 2004-03-09
Classification: F16K,F25B,Y02B

Abstract:
An electrically operated needle valve for a refrigerating circuit, comprising a valve main body (1) having a needle fit/insert aperture (16) and a refrigerant flow path (9) to which one end of said needle fit/insert aperture (16) opens, a casing (3) attached to said valve main body (1), a needle (2), inserted in said needle fit/insert aperture (16), for adjusting the flow path area of said refrigerant flow path (9), and for zoning said refrigerant flow path (9) into a refrigerant introduction portion (11) and a refrigerant withdrawal portion (12), and electrically operated means (X) for driving said needle (2),wherein said valve main body (1) on the other side of said needle fit/insert aperture (16) is positioned in an internal space (30) of said casing (3), while at least a part of said electrically operated means (X) is housed in said internal space (30) of said casing (3); and wherein said valve main body (1) is provided with refrigerant flow amount lowering means (P) that allows a refrigerant to follow between said refrigerant introduction portion (11) of said refrigerant flow path (9) and said internal space (30) in two opposite directions without flowing through a needle fit/insert clearance (17), so as to lower the amount of flow of a refrigerant flowing into said internal space (30) from said refrigerant flow path (9) through said needle fit/insert clearance (17) formed between said needle fit/insert aperture (16) and said needle (2).