04617804 is referenced by 68 patents and cites 4 patents.

In a refrigeration cycle in which the opening of the expansion valve is controlled by the super-heat degree of the refrigerant periodically detected at the outlet of the evaporator, a negative control signal is produced to rapidly change the opening of the expansion valve when the detected super-heat degree has reached zero. As a result, occurrence of the liquid back is prevented.

Title
Refrigerant flow control device
Application Number
6/824552
Publication Number
4617804
Application Date
January 23, 1986
Publication Date
October 21, 1986
Inventor
Kenji Emi
Katsuta
JP
Kosaku Sayo
Katsuta
JP
Seigo Miyamoto
Katsuta
JP
Toshihiko Fukushima
Ibaraki
JP
Agent
Antonelli Terry & Wands
Assignee
Hitachi
JP
IPC
F25B 41/00
View Original Source