Title:
REFRIGERATING SYSTEM
Document Type and Number:
Japanese Patent JP3008925
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To restrict the complication of a circuitry by simplifying the control of a high pressure refrigerant pressure and the sampling control of a gas refrigerant.
SOLUTION: A high temperature side refrigerating circuit 20 comprises a compressor 21, a condenser 22, an electric expansion valve EVE, a receiver 25 and a motor-operated expansion valve and evaporation parts of refrigerant heat exchangers parallel with each other, which are interconnected sequentially. Two low temperature side refrigerating circuits comprise the compressor, condensing parts of the refrigerant heat exchanges, an expansion valve and a heat exchanger tube for evaporation which are interconnected sequentially to perform a heat exchange between a primary refrigerant and a secondary refrigerant in the refrigerant heat exchangers. In addition, a gas path 43 is provided to link a first gas piping 40 and the receiver 25 between a four-way selector valve 24 and the condenser 22 of the high temperature side refrigerating circuit 20. When a high pressure refrigerant pressure during the cooling operation comes down below a preset specified value, the gas path 43 is made to communicate. On the other hand, the communication is made with the gas path 43 during the defrosting operation.
Inventors:
Akitoshi Ueno
Takeo Ueno
Toshiaki Mukaiya
Keiji Arii
Narihisa Kondo
Takeo Ueno
Toshiaki Mukaiya
Keiji Arii
Narihisa Kondo
Application Number:
JP9939098A
Publication Date:
February 14, 2000
Filing Date:
April 10, 1998
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B7/00; F25B47/02; (IPC1-7): F25B47/02; F25B7/00
Domestic Patent References:
| JP7234041A | ||||
| JP238061U | ||||
| JP5596367U | ||||
| JP5546185U |
Attorney, Agent or Firm:
Hiroshi Maeda (2 outside)
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