Title:
REFRIGERANT-CIRCULATING SYSTEM, AND REFRIGERATING AND AIR-CONDITIONER APPARATUS
Document Type and Number:
Japanese Patent JP3140923
Kind Code:
B2
Abstract:
PURPOSE: To obtain a circulating system wherein the composition of a nonazeotropic mixture refrigerant is maintained so as to be suitable for its operating condition at all times, reliability is high and its capacity can be displayed, by a method wherein the composition of the mixed refrigerant circulating in a refrigerant circuit is estimated at the time of operation, is varied according to its estimate, and is properly controlled corresponding to the operating condition.
CONSTITUTION: A compressor 1, a four-way valve 2, a heat source-side heat-exchanger 3, a throttling device 4, a load-side heat-exchanger 5 and a low-pressure receiver 6 are respectively connected to each other, and a refrigerant circuit is composed. A controller 100 determines the degree of opening of the throttling device 4 on the basis of data from a first thermal sensor 101, a second temperature sensor 102 and a pressure sensor 103, and controls a refrigerant-circulating system. When the degree of opening of the throttling device 4 is determined, first of all, either cooling operation or heating operation is determined. In the case of the cooling operation, an evaporating temperature Te is found on the basis of a composition α1 of a nonazeotropic mixture circulating in the refrigerant circuit, a temperature T1 detected by the first temperature sensor 101, and a temperature T2 detected by the second temperature sensor 102, and the degree of opening of the throttling device 4 is determined in order that the degree of superheat, SH=T2-Te, is at a target value corresponding to the composition α1.
Inventors:
Osamu Morimoto
Hidekazu Tani
Tomohiko Kasai
Yoshihiro Sumida
Hidekazu Tani
Tomohiko Kasai
Yoshihiro Sumida
Application Number:
JP29133194A
Publication Date:
March 05, 2001
Filing Date:
November 25, 1994
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
F25B1/00; (IPC1-7): F25B1/00
Domestic Patent References:
| JP7269972A | ||||
| JP6155562A | ||||
| JP6101912A | ||||
| JP62153853A | ||||
| JP62228839A | ||||
| JP6117737A | ||||
| JP239179Y2 |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)
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