Heat pump and control method thereof

Abstract

The present disclosure provides a heat pump and a control method thereof. The heat pump according to an embodiment of the present disclosure includes: a circulation flow path in which a flow direction of a refrigerant is switched depending on a cooling mode or a heating mode; a first outdoor heat exchanger and a second outdoor evaporative heat exchanger arranged in series on the circulation flow path; and a flow path switching valve disposed on the circulation flow path and switching the flow direction of the refrigerant in the circulation flow path so that the refrigerant is evaporated while flowing in the order of the second outdoor evaporative heat exchanger and the first outdoor heat exchanger in the heating mode.

What is claimed is: 
     
         1 . A heat pump, comprising:
 a circulation flow path in which a flow direction of a refrigerant is switched depending on a cooling mode or a heating mode;   a first outdoor heat exchanger and a second outdoor evaporative heat exchanger arranged in series on the circulation flow path; and   a flow path switching valve disposed on the circulation flow path and switching the flow direction of the refrigerant in the circulation flow path so that the refrigerant is evaporated while flowing in the order of the second outdoor evaporative heat exchanger and the first outdoor heat exchanger in the heating mode.   
     
     
         2 . The heat pump according to  claim 1 , wherein the flow path switching valve switches the flow direction of the refrigerant in the circulation flow path so that the refrigerant is condensed while flowing in the order of the first outdoor heat exchanger and the second outdoor evaporative heat exchanger in the cooling mode. 
     
     
         3 . The heat pump according to  claim 1 , wherein the first outdoor heat exchanger is comprised of a first outdoor air-cooling type heat exchanger. 
     
     
         4 . The heat pump according to  claim 3 , wherein the first outdoor air-cooling type heat exchanger includes a tube through which the refrigerant flows and a fin disposed on the tube. 
     
     
         5 . The heat pump according to  claim 1 , wherein the first outdoor heat exchanger and the second outdoor evaporative heat exchanger are disposed adjacently to each other, and
 one outdoor fan is disposed between the first outdoor heat exchanger and the second outdoor evaporative heat exchanger.   
     
     
         6 . The heat pump according to  claim 1 , wherein among the first outdoor heat exchanger and the second outdoor evaporative heat exchanger, at least the second outdoor evaporative heat exchanger is disposed to be inclined at a certain angle from a vertical direction on the circulation flow path. 
     
     
         7 . The heat pump according to  claim 1 , wherein the second outdoor evaporative heat exchanger includes a water injection module configured to perform a water injection operation by supplying the refrigerant toward the second outdoor evaporative heat exchanger in the cooling mode and configured not to perform the water injection operation in the heating mode. 
     
     
         8 . A control method of a heat pump including a first outdoor heat exchanger and a second outdoor evaporative heat exchanger arranged in series on a circulation flow path in which a flow direction of a refrigerant is switched depending on a cooling mode or a heating mode,
 wherein the refrigerant is controlled to be evaporated while flowing in the order of the second outdoor evaporative heat exchanger and the first outdoor heat exchanger in the heating mode.   
     
     
         9 . The control method of a heat pump according to  claim 8 , wherein the refrigerant is controlled to be condensed while flowing in the order of the first outdoor heat exchanger and the second outdoor evaporative heat exchanger in the cooling mode. 
     
     
         10 . The control method of a heat pump according to  claim 8 , wherein the first outdoor heat exchanger is comprised of an air-cooling type heat exchanger. 
     
     
         11 . The control method of a heat pump according to  claim 8 , wherein the first outdoor heat exchanger and the second outdoor evaporative heat exchanger share one outdoor fan. 
     
     
         12 . The control method of a heat pump according to  claim 8 , wherein the second outdoor evaporative heat exchanger operates as an evaporative condenser by performing a water injection operation in the cooling mode, and operates as an air-cooling type evaporator without the water injection operation in the heating mode.