Integrated ventilation unit

Abstract

An integrated ventilation unit configured to provide ventilation and conditioned air to an indoor space may include a heat pump system, an energy recovery device and a control unit. The heat pump system may include a first coil located at a supply air side of the ventilation unit, a second coil located at an exhaust air side of the ventilation unit, and a compressor. The energy recovery device may be configured to transfer heat between a return air stream and a supply air stream and the control unit may be configured to control operation of the heat pump system and the energy recovery device.

1 . (canceled) 
     
     
         2 . An integrated ventilation heat pump unit:
 a supply air side comprising an intake air chamber;   an exhaust air side comprising an exhaust air chamber;   an energy recovery device spanning the supply air side and the exhaust air side;   a bypass passageway connected to the intake air chamber and to the exhaust air chamber; and   a heat pump comprising:
 a first coil located in the supply air chamber downstream of the energy recovery device; and 
 a second coil located in the exhaust air chamber downstream of the energy recovery device. 
   
     
     
         3 . The integrated ventilation heat pump unit of  claim 2 , wherein the supply air side further comprises a supply air chamber downstream of the intake air chamber. 
     
     
         4 . The integrated ventilation heat pump unit of  claim 2 , wherein the exhaust air side further comprises a return air chamber upstream of the exhaust air chamber. 
     
     
         5 . The integrated ventilation heat pump unit of  claim 2 , further comprising:
 a supply fan to deliver supply air to a space; and   an exhaust fan to draw return air from the space and exhaust air from the exhaust chamber.   
     
     
         6 . The integrated ventilation heat pump unit of  claim 2 , the heat pump further comprising:
 a compressor to move refrigerant between the first and second coils; and   
       a four-way valve device to controllably reverse a direction of flow of the refrigerant between the first and second coils. 
     
     
         7 . The integrated ventilation heat pump unit of  claim 2 , further comprising:
 a preheater located in the return air chamber.   
     
     
         8 . The integrated ventilation heat pump unit of  claim 2 , the bypass passageway further comprising a flow control device. 
     
     
         9 . The integrated ventilation heat pump unit of  claim 8 , wherein the flow control device is a damper. 
     
     
         10 . An integrated ventilation heat pump unit:
 a supply air side comprising an intake air chamber and a supply air chamber downstream of the intake air chamber.;   an exhaust air side comprising an exhaust air chamber and a return air chamber upstream of the exhaust air chamber;   an energy recovery device spanning the supply air side and the exhaust air side;   a heat pump comprising:
 a first coil located in the supply air chamber downstream of the energy recovery device; and 
 a second coil located in the exhaust air chamber downstream of the energy recovery device. 
   
     
     
         11 . The integrated ventilation heat pump unit of  claim 10 , further comprising: 
       a bypass passageway connected to the intake air chamber and to the exhaust air chamber. 
     
     
         12 . The integrated ventilation heat pump unit of  claim 10 , further comprising:
 a supply fan to deliver supply air to a space; and   an exhaust fan to draw return air from the space and exhaust air from the exhaust chamber.   
     
     
         13 . The integrated ventilation heat pump unit of  claim 10 , the heat pump further comprising:
 a compressor to move refrigerant between the first and second coils; and   a four-way valve device to controllably reverse a direction of flow of the refrigerant between the first and second coils.   
     
     
         14 . The integrated ventilation heat pump unit of  claim 10 , further comprising:
 a preheater located in the return air chamber   
     
     
         15 . The integrated ventilation heat pump unit of  claim 10 , the bypass passageway further comprising a flow control device. 
     
     
         16 . The integrated ventilation heat pump unit of  claim 11 , wherein the flow control device is a damper. 
     
     
         17 . The integrated ventilation heat pump unit of  claim 10 , further comprising
 a control unit configured to control operation of the heat pump system and the energy recovery device.   
     
     
         18 . The integrated ventilation heat pump unit of  claim 17 , wherein the control unit is configured to vary the speed of the compressor based on conditions associated with air exiting the supply air side of the ventilation unit. 
     
     
         19 . The integrated ventilation heat pump unit of  claim 17 , wherein the control unit is configured to control the energy recovery device based on environmental conditions associated with at least one of the supply air side and the exhaust air side. 
     
     
         20 . The integrated ventilation heat pump unit of  claim 17 , further comprising:
 a preheater located in the return air chamber.   
     
     
         21 . The integrated ventilation heat pump unit of  claim 20 , wherein the control unit is configured to determine whether air of the intake air chamber is less than a predetermined value and is configured to activate the preheater when the outside air is less than the predetermined value.