Title: Filter block and method of making the same

Abstract: A filter-drier block for use in refrigeration systems to filter and remove moisture from the refrigerant fluid, and the method of making the block. The block is comprised of granular adsorbent material bound together to form a rigid block by the use of phenolic resin and polyisocyanate binders and characterized by a low pressure drop for fluid passing through the block. The method of making the block includes the steps of mixing dry adsorbent granules with solutions of the two binders, blow molding the mixture into a block, curing the resins with an alkaline gas, purging the block of the gas by passing air through the block, and heating the block to drive off the solvents for the binders. The invention also includes a refrigeration system utilizing the block.

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Inventors: Krause, Walter O. (Newark, NY, US)

Application Number: 864560
Filing Date: 1977-12-27
Publication_date: 1979-03-13
Assignee: Parker-Hannifin Corporation (Cleveland, OH)
Primary Class(es): 210/496 210/502.1, 210/504
Other Classes:
US Patent Ref:

3238056	Mar, 1966	Pall et al.	210/506.
3538020	Nov, 1970	Heskett et al.	210/496.
3851026	Nov, 1974	Heskett et al.	264/54.

Other Refs:
Primary Examiner: Sever, Frank
Assistant Examiner:
Attorney: Wolfram; John N.