|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||62/193 ; ; 62/210 ; ; 62/470|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 28 인용 특허 : 0|
A normally closed valve is located downstream of the oil separator to insure that sufficient oil pressure builds up to lubricate the compressor. The valve is responsive to the differential pressure between discharge and economizer such that throttling takes place over a limited portion of the operating envelope.
In a closed refrigeration system having an operating envelope and serially including a compressor, an oil separator, a normally closed valve, a condenser, an economizer means and an evaporator means, valve control means comprising: said normally closed valve being fluidly connected to said economizer means whereby economizer pressure tends to bias said valve closed; compressor discharge pressure acting on said normally closed valve so as to provide an opening bias thereto, whereby said valve provides a throttling of flow through said valve over a limited...