Patent ID: 6390792
Filing Date: 2002-05-21
Classification: F04C

Abstract:
A scroll compressor apparatus comprising:(a) a fixed scroll member having first and second portions forming opposing sides thereof, said first portion having a plurality of scroll wraps extending therefrom, said second portion having a tubular neck extending therefrom, said tubular neck defining a discharge port; (b) an orbit scroll member coupled to said fixed scroll member, said orbit scroll member having a plurality of scroll wraps respectively engaging said scroll wraps of said fixed scroll member to define therebetween a plurality of compression chambers communicating with said discharge port of said fixed scroll member; and, (c) an isolation block disposed adjacent said fixed scroll member, said isolation block having high pressure and low pressure portions forming opposing sides thereof; (1) said high pressure portion including an axially projecting ring extending about a venting passage and a baffle coupled to said projecting ring to axially enclose said venting passage, said projecting ring having formed therein a plurality of transversely directed venting apertures; and, (2) said low pressure portion defining a groove and a through hole extending to said venting passage therefrom, said groove receiving therein said tubular neck of said fixed scroll member, said through hole communicating with said discharge port of said fixed scroll member, said through hole being less in diametric extent than said venting passage and at least a proximate portion of said discharge port; and, (d) a valve displaceably disposed in said venting passage of said high pressure portion of said isolation block, said valve being displaceable between closed and open positions, said valve in said closed position sealing an axial end of said through hole.