Integrated space conditioning and water heating/cooling systems and methods thereto

Abstract

Embodiments include systems and methods for heating water and cooling air simultaneously, as well as other simultaneous heating and cooling operations. An example variable refrigerant flow conditioning system includes an outdoor unit having a compressor, a condenser coil, and a fan, a water heater coupled to the outdoor unit, a first air conditioning unit coupled to the outdoor unit, and a controller. The controller may be configured to determine that a cooling mode is active during a first time interval, cause vapor refrigerant to be directed from the outdoor unit to the water heater and liquid refrigerant to be directed from the outdoor unit to the first air conditioning unit, determine that an air heating mode is active during a second time interval, and cause the vapor refrigerant to be directed from the outdoor unit to both the water heater and the first air conditioning unit.

1 . A variable refrigerant flow (VRF) conditioning system comprising:
 an outdoor unit;   a water heater coupled to the outdoor unit;   a first air conditioning unit coupled to the outdoor unit;   a second air conditioning unit coupled to the outdoor unit, wherein the second air conditioning unit is configured to operate in an air heating mode and an air cooling mode independent of the first air conditioning unit; and   a controller configured to:   determine that the air cooling mode is active at the first air conditioning unit during a first time interval;   cause vapor refrigerant to be directed from the outdoor unit to the water heater and liquid refrigerant to be directed from the outdoor unit to the first air conditioning unit, such that the water heater heats water and the first air conditioning unit simultaneously outputs cooled air during the first time interval;   determine that the air heating mode is active at the second air conditioning unit during the first time interval; and   cause the vapor refrigerant to be directed from the outdoor unit to the second air conditioning unit, such that the second air conditioning unit outputs heated air during the first time interval.   
     
     
         2 . The VRF conditioning system of  claim 1 , wherein the controller is further configured to:
 cause, during the first time interval, heat energy extracted from the liquid refrigerant to be directed to the water heater.   
     
     
         3 . The VRF conditioning system of  claim 1 , wherein the controller is further configured to:
 determine that the air heating mode is active at the first air conditioning unit during a second time interval; and   cause the vapor refrigerant to be directed from the outdoor unit to both the water heater and the first air conditioning unit, such that the water heater heats the water and the first air conditioning unit simultaneously outputs heated air during the second time interval.   
     
     
         4 . The VRF conditioning system of  claim 1 , wherein the outdoor unit comprises a compressor, a condenser coil, and a fan. 
     
     
         5 . The VRF conditioning system of  claim 1 , further comprising:
 a VRF network comprising a vapor refrigerant conduit, a liquid refrigerant conduit, and a return refrigerant conduit, the VRF network extending between the outdoor unit, the water heater, the first air conditioning unit, and the second air conditioning unit;   wherein the water heater is a first terminal of the VRF network, the first air conditioning unit is a second terminal of the VRF network, and the second air conditioning unit is a third terminal of the VRF network.   
     
     
         6 . The VRF conditioning system of  claim 4 , wherein the VRF network further comprises:
 a branch selector component configured to:   separate a mixture of vapor refrigerant and liquid refrigerant being directed from the outdoor unit to the branch selector component into the vapor refrigerant and the liquid refrigerant.   
     
     
         7 . The VRF conditioning system of  claim 6 , wherein the branch selector component is configured to direct the vapor refrigerant to the second terminal when the first air conditioning unit is heating air, and to direct the liquid refrigerant to the second terminal when the first air conditioning unit is cooling air. 
     
     
         8 . The VRF conditioning system of  claim 1 , wherein the outdoor unit is a single outdoor unit. 
     
     
         9 . The VRF conditioning system of  claim 1 , wherein the water heater has a plurality of predetermined temperature set points. 
     
     
         10 . The VRF conditioning system of  claim 1 , wherein the controller is further configured to:
 cause the water heater to operate in a water heating mode at a predetermined scheduled time.   
     
     
         11 . The VRF conditioning system of  claim 1 , wherein the water heater is configured to heat or cool water for a pool. 
     
     
         12 . The VRF conditioning system of  claim 1 , wherein the water heater is positioned in a first interior area of a building, the first air conditioning unit is positioned in a second interior area of the building, and the second air conditioning unit is positioned in a third interior area of the building, wherein the third interior area is different from the second interior area. 
     
     
         13 . The VRF conditioning system of  claim 1 , wherein the water heater is a heat pump water heater. 
     
     
         14 . A system comprising:
 an outdoor unit;   a water heater coupled to the outdoor unit;   a first air conditioning unit coupled to the outdoor unit;   a second air conditioning unit coupled to the outdoor unit, wherein the second air conditioning unit is configured to operate in an air heating mode and an air cooling mode independent of the first air conditioning unit; and   a controller configured to:   determine that the air cooling mode is active at the first air conditioning unit during a first time interval;   cause vapor refrigerant to be directed from the outdoor unit to the water heater and liquid refrigerant to be directed from the outdoor unit to the first air conditioning unit, such that the water heater heats water and the first air conditioning unit simultaneously outputs cooled air during the first time interval;   determine that the air heating mode is active at the second air conditioning unit during the first time interval; and   cause the vapor refrigerant to be directed from the outdoor unit to the second air conditioning unit, such that the second air conditioning unit outputs heated air during the first time interval.   
     
     
         15 . The system of  claim 14 , wherein the controller is further configured to:
 cause, during the first time interval, heat energy extracted from the liquid refrigerant to be directed to the water heater.   
     
     
         16 . The system of  claim 14 , wherein the outdoor unit is a single outdoor unit. 
     
     
         17 . The system of  claim 14 , wherein the water heater has a plurality of predetermined temperature set points. 
     
     
         18 . The system of  claim 1 , wherein the controller is further configured to:
 cause the water heater to operate in a water heating mode at a predetermined scheduled time.   
     
     
         19 . A system comprising:
 an outdoor unit;   a water heater;   a first air conditioning unit;   a second air conditioning unit; and   a controller configured to:   determine that an air cooling mode is active at the first air conditioning unit during a first time interval;   cause vapor refrigerant to be directed from the outdoor unit to the water heater and liquid refrigerant to be directed from the outdoor unit to the first air conditioning unit, such that the water heater heats water and the first air conditioning unit simultaneously outputs cooled air during the first time interval;   determine that an air heating mode is active at the second air conditioning unit during the first time interval; and   cause the vapor refrigerant to be directed from the outdoor unit to the second air conditioning unit, such that the second air conditioning unit outputs heated air during the first time interval.   
     
     
         20 . The VRF conditioning system of  claim 19 , wherein the second air conditioning unit is configured to operate in the air heating mode and the air cooling mode independent of the first air conditioning unit.