Air conditioner

Abstract

An air conditioner executes a heating operation using at least a high pressure refrigerant, and includes a refrigerant circuit configured to execute a vapor compression refrigeration cycle. The refrigerant circuit includes a convective heat exchanger, a radiant heat exchanger, an open/close valve and a check valve. The convective heat exchanger executes heat exchange between the high pressure refrigerant flowing inside and an air flowing towards outside. The radiant heat exchanger heats a predetermined member using the high pressure refrigerant flowing inside to cause the predetermined member to emit a radiant heat. The open/close valve is disposed upstream of the radiant heat exchanger in order to block a flow path of the high pressure refrigerant flowing towards the radiant heat exchanger during the heating operation. The check valve is disposed between the radiant heat exchanger and the open/close valve.

1 . An air conditioner
 configured to execute a heating operation using at least a high pressure refrigerant, the air conditioner comprising:   a refrigerant circuit configured to execute a vapor compression refrigeration cycle, the refrigerant circuit including:
 a convective heat exchanger configured to execute heat exchange between the high pressure refrigerant flowing through an inside thereof and an air flowing towards an outside thereof; 
 a radiant heat exchanger configured to heat a predetermined member by using the high pressure refrigerant flowing through the inside thereof to cause the predetermined member to emit a radiant heat; 
 an open/close valve disposed upstream of the radiant heat exchanger in order to block a flow path of the high pressure refrigerant flowing towards the radiant heat exchanger during the heating operation; and 
 a check valve disposed between the radiant heat exchanger and the open/close valve. 
   
     
     
         2 . The air conditioner recited in  claim 1 , wherein
 the open/close valve is an opening degree regulating valve arranged and configured to block the flow path and to regulate an opening degree of the flow path.   
     
     
         3 . The air conditioner recited in  claim 1 , wherein
 the open/close valve is arranged and configured to block the flow path when a temperature of the predetermined member reaches an upper limit of a permissive temperature.   
     
     
         4 . The air conditioner recited in  claim 2 , wherein
 the open/close valve is further arranged and configured to block the flow path when a temperature of the predetermined member reaches an upper limit of a permissive temperature.