Back to results
US 2003/0196449 A1Published application
Refrigerating apparatus
AssigneeHitachi, Ltd.
InventorsMakoto Fujita, Yoshikazu Amo
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHitachi, Ltd.
InventorsMakoto Fujita, Yoshikazu Amo
Estimating the term…
A liquid injection type scroll compressor is used to a refrigerating apparatus using hydrocarbon fluoride refrigerant which does not contain chlorine (HFC-125/HFC-143a/HFC-134a) as an operating fluid and an amount of an injected liquid is controlled according to a discharge temperature of the compressor. Further, ester oil and/or ether oil is used as refrigerator oil and a dryer is disposed in a refrigerating cycle. With this arrangement, a refrigerating cycle operation can be stably realized in a wide range without almost changing the arrangement of a conventional refrigerating apparatus.
A refrigerator comprising a compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
A refrigerator comprising a compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
A refrigerator comprising a scroll compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
A refrigerator comprising a compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
A refrigerator comprising a compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
A refrigerating apparatus for constituting a refrigerating cycle including at least a scroll compressor and a condenser, further comprising:
A refrigerating apparatus for constituting a refrigerating cycle including at least a compressor and a condenser, further comprising:
A refrigerator comprising a scroll compressor, a condenser, a single or mixed HFC refrigerant, and a refrigerator oil composed of ester oil or ether oil, the refrigerator further comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Comprising halogenated compounds: containing only fluorine as halogen
Injection of a fluid in the working chamber for sealing, cooling and lubricating: with control systems for the injection of the fluid
Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00: removing solid or…
Characterised by the refrigerant: the refrigerant containing more than one component
Term end not estimated
1. Field of the Invention
The present invention relates to a refrigerating apparatus used to air conditioners, refrigerators and the like, and more specifically, to a refrigerating apparatus using a mixed refrigerant which does not contain chlorine.
2. Description of the Prior Art
FIG. 1 is a system diagram of a refrigerating apparatus showing an example of the present invention;
FIG. 2 is a system diagram of the main portion showing another example of a liquid injection arrangement in FIG. 1;
FIG. 3 is a system diagram of the main portion showing a still another example of the liquid injection arrangement in FIG. 1;
In this embodiment, a triple-mixed hydrocarbon fluoride refrigerant which is composed of 40-48 wt %, e.g., 44 wt % of HFC-125, 47-57 wt %, e.g., 52 wt % of HFC-143a and up to 10 wt %, e.g., 4 wt % of HFC-134a and does not contain chlorine is used as a refrigerant for a refrigerating cycle and a liquid injection type scroll compressor is used as a compressor. Alternatively, a double-mixed hydrocarbon fluoride refrigerant which is composed of HFC-125 and HFC-143a, e.g., 50 wt % of HFC-125 and 50 wt % of HFC-143a, and does not contain chlorine is used as a refrigerant for the refrigerating cycle. Further, ester oil (for example, disclosed in Japanese Patent Publication Laid-Open No. 4-183788) as a new refrigerator oil and/or ether oil is used and a means disclosed in, for example, Japanese Patent Publication-Laid-Open No. 5-231263 is used as a means for preventing the mixing of a chlorine substance in order to secure the reliability of an apparatus.
A specific embodiment of the present invention will be described below with reference to FIG. 1.
As shown in FIG. 1, a refrigerating apparatus of the embodiment constitutes a refrigerating cycle by sequentially connecting a scroll compressor 1, a condenser 2, a liquid receiver 3, a dryer 4, expansion valves 51 and 52, evaporators 61 and 62, a strainer 18, and an accumulator 7. Further, the condenser 2 is provided with two sets of blower motors 81 and 82 and propeller fans 91 and 92 for supplying external air as shown in FIG. 1.