Unitary air conditioning system

Abstract

A unitary air conditioning system comprises an outdoor unit including a compressor for compressing refrigerant, an outdoor heat exchanger for heat exchange of refrigerant, and an expander connected to the outdoor heat exchanger, for expanding refrigerant; a duct installed in each zone of a building; a plurality of central blower units, each unit having a heat exchanger connected to the outdoor unit by a refrigerant pipe and a blower for supplying the air heat-exchanged by the heat exchanger to the duct; and a cooling/heating control unit for selectively distributing a refrigerant from the outdoor unit toward the heat exchangers of the plurality of central blower units and controlling cooling or heating operation for each zone of the building. Accordingly, the plurality of blower units are systematically operated according to a load of each zone inside the building, so that the cooling or heating operation can be effectively performed on each zone.

1 . A unitary air conditioning system comprising: 
 an outdoor unit including a compressor for compressing refrigerant, an outdoor heat exchanger for heat exchange of refrigerant, and an expander connected to the outdoor heat exchanger, for expanding refrigerant;    a duct installed in each zone of a building;    a plurality of central blower units, each unit having a heat exchanger connected to the outdoor unit by a refrigerant pipe and a blower for supplying the air heat-exchanged by the heat exchanger to the duct; and    a cooling/heating control unit for selectively distributing a refrigerant from the outdoor unit toward the heat exchangers of the plurality of central blower units and controlling cooling or heating operation for each zone of the building.    
   
   
       2 . The system of  claim 1 , wherein the cooling/heating control unit comprises: 
 a plurality of temperature controllers installed inside each zone in the building, for detecting a temperature of each zone and receiving a set temperature value of a user;    control valves installed at refrigerant pipes for respectively connecting the outdoor unit with the plurality of central blower units, for controlling a flow rate of a refrigerant; and    a control unit connected to the temperature controllers, for comparing a room temperature inputted from each temperature controller with a set temperature value of a user, and controlling the control valves.    
   
   
       3 . A unitary air conditioning system comprising: 
 an outdoor unit including a compressor for compressing refrigerant, an outdoor heat exchanger for heat exchange of refrigerant, and an expander connected to the outdoor heat exchanger, for expanding refrigerant;    a duct installed in each zone of a building;    a central blower unit having a heat exchanger connected to the outdoor unit by a refrigerant pipe, and a blower for supplying the air heat-exchanged by the heat exchanger to the duct;    an individual blower unit including a heat exchanger connected to the outdoor unit by a refrigerant pipe and a fan for sending the air heat-exchanged by the heat exchanger, and disposed in a zone inside the building, for individually cooling or heating the zone; and    a cooling/heating control unit for selectively distributing the refrigerant from the outdoor unit toward the heat exchangers of the central blower unit and the individual blower unit, and controlling cooling or heating operation for each zone of the building.    
   
   
       4 . The system of  claim 3 , wherein the cooling/heating control unit comprises: 
 a plurality of first temperature controllers installed inside each zone in the building, for detecting a temperature of each zone and receiving a set temperature value of a user;    a second temperature controller installed at the individual blower unit, for receiving a set temperature value of the user and detecting a temperature of a room where the individual blower unit is installed;    control valves respectively installed at refrigerant pipes that respectively connect the outdoor unit with the central blower units and a refrigerant pipe that connects the outdoor unit with the individual blower unit; and    a control unit connected with the first temperature controllers and the second temperature controller, for comparing the room temperatures inputted from the first and second temperature controllers with the set temperature value, and controlling the control valves.    
   
   
       5 . The system of  claim 4 , wherein the second temperature controller and the control unit are directly connected to each other through a communication line.