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US 5,685,168 AGranted
Refrigerating apparatus
AssigneeDaikin Industries, Ltd.
InventorShinri Sada
Life of this patent
Estimating the term…
Abstract
In a refrigerating apparatus having a compression mechanism (21), an outdoor heat exchanger (24), an outdoor motor-operated expansion valve (25) and an indoor heat exchanger (32), the compression mechanism (21) is so composed that two compressors (2a, 2b) are connected in parallel with each other. Each compressor (2a, 2b) is provided with an oil discharge mechanism (40) for discharging, when lubricating oil stored in its casing exceeds a set amount, the lubricating oil.
Claims11
A refrigerating apparatus comprising:
- a refrigerant circulation system having a closed circuit for circulating refrigerant, to which a compression mechanism, a thermal-source-side heat exchanger, an expansion mechanism and a used-side heat exchanger are connected,
- wherein said compression mechanism has a plurality of compressors connected in parallel with one another,
- each of said compressors has an oil discharge mechanism, and
- said oil discharge mechanism introduces, when lubricating oil stored in a casing of a compressor out of said compressors exceeds a set amount, the excess of lubricating oil to a low pressure part inside of said compressor and discharges the excess of lubricant oil together with a refrigerant into said refrigerant circulation system outside of said compressor.
1 more element
A refrigerating apparatus comprising:
- a refrigerant circulation system having a closed circuit for circulating refrigerant which is connected to:
- a plurality of thermal source units each of which has at least a compression mechanism and a thermal-source-side heat exchanger and which are connected in parallel with one another;
- and
- a user unit which has at least a used-side heat exchanger,
- wherein the refrigerant is circulated in such a manner that said refrigerant discharged from said compression mechanisms is condensed by one of said heat exchangers, is expanded by said expansion mechanism and is then evaporated by the other heat exchanger,
- said refrigerating apparatus comprising an oil discharge mechanism, provided in each of said compression mechanisms, and
- said oil discharge mechanism introduces, when lubricating oil stored in one of said compression mechanisms exceeds a set amount, the excess of lubricating oil to a low pressure part inside of said compression mechanism and discharges the excess of lubricant oil together with the refrigerant into said refrigerant circulation system outside of said compression mechanism.
4 more elements
Dependencies are inferred from the claim text.