Oilless screw compressor and compressed air cooling unit

Details Oilless screw compressor and compressed air cooling unit Oilless screw compressor and compressed air cooling unit

2011-08-02

2011-08-02

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

C418S009000, C418S085000, C418S201100, C417S243000, C417S410400

Reexamination Certificate

active

07988435

ABSTRACT:
An oilless screw compressor incorporating water-cooled cooling units for cooling compressed air discharged from compressor bodies having a pair of male and female screw rotors which can be rotated in a contactless and oilless manner, the cooling units comprising a plate type heat-exchanger, and the amount of cooling water for the plate type heat-exchanger being adjustable. With this configuration, a difference between a temperature during load operation and a temperature upon automatic stopping and during unload operation of the compressor can be reduced, so that the cooling unit can be restrained from being damaged or broken within a short period, thereby it is possible to provide a highly reliable oilless screw compressor.

REFERENCES:
patent: 1 138 948 (2001-10-01), None
patent: 03-290089 (1991-12-01), None
patent: 11-019461 (1999-01-01), None
patent: 11-336684 (1999-12-01), None
patent: 2001-153080 (2001-06-01), None
patent: 2006-249934 (2006-09-01), None
Office Action of Chinese Appln. No. 200710104469 dated Jul. 31, 2009 with partial translation.
European Search Report dated Jan. 25, 2001; National Registration No. BE 200700243; 6 pages; European Patent Office.

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