Air conditioning system using outdoor air, indoor air unit, and outdoor air unit thereof, and stack

Abstract

An air conditioning system using outdoor air has a first heat exchanger, an evaporator, a condenser, and a first fan disposed on the interior side; and a second heat exchanger and a second fan disposed on the exterior side. An expansion valve and a compressor are further provided. An air conditioner has a first piping connected to the evaporator, the condenser, the expansion valve, and the compressor, for circulating a first refrigerant to perform a compression-type refrigeration cycle. An indirect outdoor air cooler has a second piping connected to the first heat exchanger and the second heat exchanger for circulating a second refrigerant to induce a heat exchange in the first heat exchanger between the second refrigerant and the indoor, and to induce a heat exchange in the second heat exchanger between the outdoor air and the second refrigerant.

1 - 19 . (canceled) 
     
     
         20 . An air conditioning system using outdoor air, the air conditioning system defining an interior side as an inside of a building having indoor air, and an exterior side as an outside of the building having the outdoor air, comprising:
 a first heat exchanger disposed on the interior side;   an evaporator disposed on the interior side;   a condenser disposed on the interior side;   a first fan disposed on the interior side for passing the indoor air through the first heat exchanger, the evaporator and the condenser, wherein the evaporator, the first heat exchanger and the condenser are arranged in this order along passage of the indoor air by the first fan;   a second heat exchanger disposed on the exterior side;   a second fan disposed on the exterior side for passing the outdoor air through the second heat exchanger;   an expansion valve provided on either the exterior side or the interior side;   a compressor provided on either the exterior side or the interior side;   a first piping connected to the evaporator, the condenser, the expansion valve, and the compressor, for circulating a first refrigerant through the first piping to the evaporator, the condenser, the expansion valve and the compressor to perform a compression refrigeration cycle, thereby forming an air conditioner; and   a second piping connected to the first heat exchanger and the second heat exchanger, a second refrigerant being circulated through the second piping to the first heat exchanger and the second heat exchanger, the second refrigerant and an indoor air that has passed through the condenser being heat exchanged by the first heat exchanger, to thereby cool the indoor air, and the second refrigerant being cooled by the outside air by heat exchanging the inside air with the second refrigerant that has been cooled in the second heat exchanger, thereby forming an indirect outdoor air cooler.   
     
     
         21 . An air conditioning system using outdoor air, comprising:
 an indoor air unit for passing through indoor air, having:
 a first heat exchanger; 
 an evaporator; 
 a condenser; and 
 a first fan for passing the indoor air through the first heat exchanger, the evaporator, and the condenser, the condenser, the first heat exchanger and the evaporator being arranged in this order from an upstream side of an indoor air flown by the first fan; 
   an outdoor air unit for passing through the outdoor air, having:
 a second heat exchanger; and 
 a second fan for passing the outdoor air through the second heat exchanger; 
   an expansion valve provided on either one of the outdoor air unit or the indoor air unit;   a compressor provided on either one of the outdoor air unit or the indoor air unit;   a first piping connected to the evaporator, the condenser, the expansion valve, and the compressor, for circulating a first refrigerant through the first piping to the evaporator, condenser, expansion valve and compressor, to form an air conditioner by a compression refrigeration cycle; and   a second piping connected to the first heat exchanger and the second heat exchanger, a second refrigerant being circulated through the second piping to the first heat exchanger and the second heat exchanger, the second refrigerant and an indoor air that has passed through the condenser being heat exchanged by the first heat exchanger, to thereby cool the indoor air by the second refrigerant, and the second refrigerant being cooled by the outside air by heat exchanging the inside air with the second refrigerant that has been cooled in the second heat exchanger, thereby forming an indirect outdoor air cooler.   
     
     
         22 . An air conditioning system using outdoor air according to  claim 21 , wherein the indoor air as a warm air flowing into the indoor air unit and increasing a temperature in a cooling object space is further heated by heat radiation from the condenser when passing through the condenser and decreases a temperature of the first refrigerant. 
     
     
         23 . An air conditioning system using outdoor air according to  claim 22 , wherein a temperature of the indoor air raised in the condenser is decreased by the heat exchange of the indoor air with the second refrigerant when passing through the first heat exchanger, and the indoor air is then cooled when passing through the evaporator, becoming cold air, and is supplied into the cooling object space; and
 the first refrigerant reduced in temperature in the condenser circulates in an order of the expansion valve and the evaporator, and cools the indoor air passing through the evaporator in the evaporator.   
     
     
         24 . An air conditioning system using outdoor air according to  claim 21 , wherein the outdoor air unit further comprises:
 a second condenser;   a branch piping branching off from the first piping and connected to the second condenser; and   a switching device provided in a branching point of the first piping, for circulating the first refrigerant in either the condenser in the indoor air unit or the second condenser in the outdoor air unit.   
     
     
         25 . An air conditioning system using outdoor air according to  claim 21 , wherein the outdoor air unit further comprises:
 a second condenser connected to the first piping; and   a switching device disposed in a branching point in which the first piping is branched on a refrigerant outflow side of the second condenser,   wherein the switching device switches routes for circulating the first refrigerant to either a first route for circulating the first refrigerant in the condenser in the indoor air unit and then circulating in the expansion valve, or a second route for circulating the first refrigerant in the expansion valve without circulating in the condenser in the indoor air unit.   
     
     
         26 . An air conditioning system using outdoor air according to  claim 24 , wherein the second heat exchanger is provided on an upstream side of an outdoor air flow formed by the second fan, and the second condenser is provided on a downstream side of the outdoor air flow. 
     
     
         27 . An air conditioning system using outdoor air according to  claim 24 , wherein the switching device circulates the first refrigerant in the condenser when an outdoor air temperature is high and in the second condenser when the outdoor air temperature is low. 
     
     
         28 . An air conditioning system using outdoor air according to  claim 25 , wherein the switching device circulates the first refrigerant in the first route when the outdoor air temperature is higher than an indoor air temperature. 
     
     
         29 . An indoor air unit for an air conditioning system using outdoor air, which is disposed on an interior side of a building to pass an indoor air therethrough and adapted to correspond to an outdoor air unit disposed on an exterior side of the building to pass an outdoor air therethrough, comprising:
 a first heat exchanger;   an evaporator;   a condenser;   a first fan for passing the indoor air through the first heat exchanger, the evaporator, and the condenser, wherein the evaporator, the first heat exchanger, and the condenser are arranged in this order along passage of the indoor air by the first fan;   an expansion valve formed in the indoor air unit;   a compressor formed in the indoor air unit;   a first piping connected to the compressor, wherein an air conditioner comprises the evaporator, the condenser, the expansion valve and a part of the first piping, and a first refrigerant passes the evaporator, the condenser, the expansion valve and the compressor through the first piping to perform a compression refrigeration cycle; and   a second piping adapted to connect the first heat exchanger to a second heat exchanger of the outdoor air unit, a second refrigerant being circulated through the second piping to the first heat exchanger and the second heat exchanger, and in the first heat exchanger, the indoor air being heat exchanged by the second refrigerant that has been cooled and the outdoor air, to thereby cool the second refrigerant by the outdoor air.   
     
     
         30 . An outdoor air unit for an air conditioning system using outdoor air, which is disposed on an outdoor side of a building to pass an outdoor air therethrough and adapted to correspond to an indoor air unit disposed on an interior side of the building to pass an indoor air therethrough, comprising:
 a second heat exchanger and a second fan for passing the outdoor air through the second heat exchanger;   an expansion valve;   a compressor;   a first piping connected to the compressor, wherein an air conditioner is adapted to comprise the evaporator, the condenser formed in the indoor air unit, the expansion valve and a part of the first piping, and a first refrigerant passes the evaporator, the condenser, the expansion valve and the compressor through the first piping to perform a compression refrigeration cycle; and   a second piping adapted to connect the second heat exchanger to a first heat exchanger of an indoor air unit, a second refrigerant being circulated through the second piping to the first heat exchanger and the second heat exchanger, and in the second heat exchanger, the indoor air being heat exchanged by the second refrigerant that has been cooled and an outdoor air being heat, to thereby cool the second refrigerant by the outdoor air.   
     
     
         31 . A stack for cooling indoor air, which is disposed on an interior side of a building to pass an indoor air therethrough and adapted to correspond to an outdoor air unit disposed on an exterior side of the building to pass an outdoor air therethrough, comprising:
 a condenser for performing a compression refrigeration cycle using a first refrigerant, and passing the indoor air therethrough as warm air flowing into the indoor air unit and raising a temperature in a cooling object space, said condenser performing a heat radiation to raise a temperature of the indoor air and decreasing a temperature of the first refrigerant;   a first heat exchanger for passing a second refrigerant therethrough that was subject to a heat exchange with the outdoor air in the outdoor air unit and the indoor air in which a temperature was increased in the condenser, and inducing a heat exchange between the second refrigerant and the indoor air;   an evaporator for performing the compression refrigeration cycle together with the condenser; and   a first fan,   wherein the condenser, the first heat exchanger, the evaporator, and the first fan are stacked and integrated.   
     
     
         32 . A stack for moving heat of indoor air to outdoor air, which is disposed on an outdoor side of a building to pass an outside air therethrough and adapted to correspond to an indoor air unit disposed on an interior side of the building to pass an interior air therethrough, comprising:
 a second heat exchanger for passing therethrough the outdoor air and a second refrigerant subject to a heat exchange with the indoor air in the indoor air unit, and inducing a heat exchange between the second refrigerant and the outdoor air; and   a second fan,   wherein the second heat exchanger and the second fan are stacked and integrated.   
     
     
         33 . An air conditioning system using outdoor air, the air conditioning system defining an interior side as an inside of a building having indoor air, and an exterior side as an outside of the building having the outdoor air, comprising:
 a first heat exchanger disposed on the interior side;   a condenser disposed on the interior side; and   a first fan disposed on the interior side, for passing the indoor air through the first heat exchanger and the condenser, wherein the condenser and the first heat exchanger are provided in an order from an upstream side of an indoor air flow formed by the first fan;   an evaporator disposed either on the exterior side or the interior side,   an expansion valve disposed either on the exterior side or the interior side,   a compressor disposed either on the exterior side or the interior side;   a first piping connected to the compressor disposed either on the exterior side or the interior side, a first refrigerant being circulated through the first piping to the evaporator, the condenser, the expansion valve and the compressor to perform a compression refrigeration cycle; and   a second piping connected to the first heat exchanger and the evaporator, a second refrigerant being circulated through the second piping to the first heat exchanger and the evaporator, the second refrigerant being cooled by the first refrigerant by heat exchanging the first refrigerant and the second refrigerant at the evaporator, and in the first heat exchanger, the inside air being cooled by the second refrigerant by heat exchanging the inside air with the second refrigerant that has been cooled, thereby forming an indirect outdoor air cooler.   
     
     
         34 . An air conditioning system using outdoor air, comprising:
 an indoor air unit for passing indoor air therethrough, including:
 a first heat exchanger; 
 a condenser; and 
 a first fan for passing the indoor air through the first heat exchanger and the condenser, wherein the indoor air unit is configured in an order of the condenser and the first heat exchanger from an upstream side of an indoor air flow formed by the first fan; 
   an outdoor air unit for passing the outdoor air therethrough;   an evaporator disposed either in the outdoor air unit or the indoor air unit;   an expansion valve disposed either in the outdoor air unit or the indoor air unit;   a compressor disposed either in the outdoor air unit or the indoor air unit;   a first piping connected to the compressor, wherein a first refrigerant is circulated through the condenser, the evaporator, the expansion valve, and the compressor, to perform a compression refrigeration cycle; and   a second piping connected to the first heat exchanger and the evaporator, a second refrigerant being circulated through the second piping to the first heat exchanger and the evaporator, the second refrigerant being cooled by the first refrigerant by heat exchanging the first refrigerant and the second refrigerant at the evaporator, and in the first heat exchanger, the inside air being cooled by the second refrigerant by heat exchanging the inside air with the second refrigerant that has been cooled, thereby forming an indirect outdoor air cooler.   
     
     
         35 . An air conditioning system using outdoor air according to  claim 33 , further comprising:
 a second heat exchanger disposed on the exterior side or in the outdoor air unit, and connected to the second piping; and   a second fan for passing the outdoor air through the second heat exchanger;   wherein the second refrigerant exchanges heat with the outdoor air in the second heat exchanger and then exchanges heat with the first refrigerant in the evaporator.   
     
     
         36 . An air conditioning system using outdoor air according to  claim 35 , wherein the second piping includes a switching device to divide the second piping into two branch pipes and to flow the second refrigerant to one of the two branch pipes, one of the branch pipes being connected to the second heat exchanger; and
 the switching device is capable of switching between a state in which the second refrigerant is circulated in the second heat exchanger, and a state in which the second refrigerant is not circulated in the second heat exchanger.   
     
     
         37 . An air conditioning system using outdoor air according to  claim 33 , wherein the first heat exchanger is a liquid-gas heat exchanger, and the evaporator is a liquid-liquid heat exchanger. 
     
     
         38 . An indoor air unit for an air conditioning system using outdoor air, which is disposed on an interior side of a building to pass an indoor air therethrough and adapted to correspond to an outdoor air unit disposed on an exterior side of the building to pass an outdoor air therethrough, comprising:
 a first heat exchanger;   a condenser;   a first fan for passing the indoor air through the first heat exchanger and the condenser, wherein the condenser and the first heat exchanger are arranged in an order from an upstream side of a flow of the indoor air formed by the first fan;   an evaporator;   an expansion valve;   a compressor;   a first piping connected to the compressor, wherein a first refrigerant is circulated through the condenser, the evaporator, the expansion valve, and the compressor to perform a compression refrigeration cycle; and   a second piping connected to the first heat exchanger and the evaporator, a second refrigerant being circulated through the second piping to the first heat exchanger and the evaporator, the second refrigerant being cooled by the first refrigerant by heat exchanging the first refrigerant and the second refrigerant in the evaporator, and in the first heat exchanger, the indoor air being heat exchanged by the second refrigerant that has been cooled and the indoor air to cool the indoor air by the second refrigerant, thereby forming an indirect outdoor air cooler.