Displacement diffuser with heat/cool changeover

Abstract

A displacement diffuser mounted in a suspended ceiling installation for supplying both heated and cooled air and using both displacement and mixing ventilation within an occupied space from a single unit. The diffuser includes a housing, an air inlet in the housing in communication with supply air, and a dual plenum divided by an intermediate wall into a heating plenum for receiving heated air and a cooling plenum for receiving cooled air. A high velocity linear air slot diffuser in directs air from the heating plenum into an occupied space at a high velocity. A low velocity diffuser allows cooled air to move via displacement into an occupied space. A damper within the housing is capable of directing heated air into the heating plenum and cooled air into the cooling plenum in response to an actuator signal.

1 . A displacement diffuser for supplying both heated and cooled air to an occupied space, comprising:
 a. a housing;   b. a single air inlet in said housing in communication with supply air;   c. a dual plenum comprising a heating plenum for receiving heated air and a cooling plenum for receiving cooled air;   d. a high velocity linear air diffuser in communication with the heating plenum;   e. a low velocity diffuser in communication with the cooling plenum; and   f. a damper capable of directing heated air into the heating plenum and cooled air into the cooling plenum.   
     
     
         2 . The displacement diffuser of  claim 1 , wherein the damper comprises at least two blades. 
     
     
         3 . The displacement diffuser of  claim 1 , wherein the damper further comprises a gasket. 
     
     
         4 . The displacement diffuser of  claim 1 , further comprising a duct housing attached to said housing for connecting said displacement diffuser with a duct. 
     
     
         5 . The displacement diffuser of  claim 1 , further comprising an air pattern controller at said low velocity diffuser. 
     
     
         6 . The displacement diffuser of  claim 1 , further comprising an equalization baffle within said housing between said air inlet and said low velocity air diffuser. 
     
     
         7 . The displacement diffuser of  claim 1 , further comprising a diffuser frame attached to said housing adjacent to the low velocity diffuser and a perforated diffuser face attached to said diffuser frame. 
     
     
         8 . The displacement diffuser of  claim 2  further comprising a pivot, wherein an edge of each of the blades is attached to said pivot. 
     
     
         9 . The displacement diffuser of  claim 2 , wherein the damper further comprises a gasket. 
     
     
         10 . The displacement diffuser of  claim 2 , further comprising two gaskets mounted to said housing, wherein one gasket is in communication with one blade of the damper when the damper is engaged in a heating mode, and wherein other gasket is in communication the other blade of the damper when engaged in a cooling mode. 
     
     
         11 . The displacement diffuser of  claim 4 , further comprising an actuator connected to said duct housing, wherein said actuator rotates the dual-blade damper to direct heated air into the heated air plenum and cooled air into the cooled air plenum. 
     
     
         12 . A displacement diffuser for supplying both heated and cooled air from a single unit to an occupied space, comprising:
 a. a housing;   b. a single air inlet in said housing communication with supply air;   c. a dual plenum comprising a heating plenum for receiving only heated air and a cooling plenum for receiving only cooled air separated by an intermediate wall within said dual plenum;   d. a high velocity linear air diffuser in communication with the heating plenum;   e. a low velocity diffuser in communication with the cooling plenum;   f. a damper within the air inlet capable of directing heated air into the heating plenum and cooled air into the cooling plenum; and   g. an actuator capable of moving said damper in response to a signal.   
     
     
         13 . The displacement diffuser of  claim 12 , wherein the damper comprises at least two blades. 
     
     
         14 . The displacement diffuser of  claim 12 , wherein the damper further comprises a gasket. 
     
     
         15 . The displacement diffuser of  claim 12 , further comprising an air pattern controller at said low velocity diffuser. 
     
     
         16 . The displacement diffuser of  claim 12 , further comprising an equalization baffle within said housing between said cooled air inlet and said low velocity air diffuser. 
     
     
         17 . The displacement diffuser of  claim 12 , further comprising a diffuser frame attached to said housing adjacent to the low velocity diffuser and a perforated diffuser face attached to said diffuser frame. 
     
     
         18 . The displacement diffuser of  claim 13  further comprising a pivot, wherein an edge of each of the blades is attached to said pivot. 
     
     
         19 . The displacement diffuser of  claim 13 , further comprising two gaskets mounted to said housing, wherein one gasket is in communication with one blade of the damper when the damper is engaged in a heating mode, and wherein other gasket is in communication the other blade of the damper when engaged in a cooling mode. 
     
     
         20 . A displacement diffuser for supplying both heated and cooled air from a single unit to an occupied space, comprising:
 a. a housing;   b. a duct housing connected to said housing for further connecting said housing to a duct;   c. a dual plenum comprising a heating plenum for receiving heated air and a cooling plenum for receiving cooled air separated by an intermediate wall within said dual plenum;   d. a single air inlet capable of being partitioned into:
 1. a heated air inlet in said housing in communication with heated supply air and said heating plenum; and 
 a cooled air inlet in said housing in communication with cooled supply air and said cooling plenum; 
   e. a high velocity linear air diffuser in communication with the heating plenum, wherein said linear air slot diffuser directs heated air in a horizontal direction or toward a wall within an occupied space and utilizes mixing ventilation;   f. a low velocity diffuser in communication with the cooling plenum, wherein said low velocity diffuser utilizes displacement ventilation; and   g. a damper in communication with said duct housing and said intermediate wall capable of directing heated air into the heating plenum and cooled air into the cooling plenum.