Air conditioning system for grocery store or the like and diffus

Details Air conditioning system for grocery store or the like and diffus Air conditioning system for grocery store or the like and diffus

1989-06-02

1991-04-02

Joyce, Harold

62255, 98 4005, 98 4015, F24F 13062, F24F 708

Patent

active

050038672

ABSTRACT:
An air conditioning system for a grocery store having refrigerated food displays along certain aisles of the store includes a plurality of air ceiling mounted air outlet diffuser units. A plurality of the units are positioned substantially above the aisles adjacent the refrigerated food displays. Each diffuser unit positioned above the aisle adjacent the refrigerated food displays is constructed so as to provide a downward flow of conditioned air into the store in a manner so that shoppers receive conditioned air free of drafts while heavy, cool, stagnant air lying adjacent the refrigerated food displays is induced upwardly into upper regions of the store. Each diffuser unit has a housing with a flared exit mouth, a tubular air passageway within the housing and an annular air passageway therebetween. A plurality of vanes are positioned in the annular passageway for producing rotational, highly turbulent currents of air flowing from the passageway. A valve controls the volume of air passing through the tubular air passageway and controls the flow pattern of the currents of air. Both the flared exit mouth and the lower end of the annular passageway extend below the store ceiling a predetermined distance so as to avoid air flowing from the annular passageway outwardly along the face of the ceiling and creating an undesirable coanda effect.

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