Air conditioner

Abstract

An air conditioner includes: an air passage 23 that is formed in a cabinet 20 so as to connect a suction port 21 and a blowoff port 22 to each other, which are open on a surface of the cabinet 20 ; a blower fan 25 that is disposed inside the air passage 23 so as to extend in one direction; a heat exchanger 27 that is disposed so as to be opposed to the suction port 21 and cools air flowing in through the suction port 21 ; a heater 28 a that is disposed between the blower fan 25 and the heat exchanger 27 in order to heat air flowing in through the suction port 21 and is shorter in a longitudinal direction than the blower fan 25 ; a control element 52 that controls the heater 28 a and is disposed outside the air passage 23 adjacently to the air passage 23 ; and a heat sink 70 that is in close contact with the control element 52 and is disposed between the blower fan 25 and the heat exchanger 27 , on an outside of the heater 28 a in the longitudinal direction.

1 . An air conditioner, comprising:
 an air passage that is formed in a cabinet so as to connect a suction port and a blowoff port to each other, which are open on a surface of the cabinet;   a blower fan that is disposed inside the air passage so as to extend in a longitudinal direction;   a heat exchanger that is disposed so as to be opposed to the suction port and exchanges heat with air flowing in through the suction port;   a heater that is disposed between the blower fan and the heat exchanger in order to heat air flowing in through the suction port and is shorter in a longitudinal direction than the blower fan;   a control element that controls the heater and is disposed outside the air passage adjacently to the air passage; and   a heat sink that is in close contact with the control element and is disposed between the blower fan and the heat exchanger, on an outside of the heater in the longitudinal direction.   
     
     
         2 . The air conditioner according to  claim 1 , wherein
 the heater is formed by a PTC heater, and the control element is formed by a triac element.   
     
     
         3 . The air conditioner according to  claim 1  or  2 , further comprising:
 a circuit substrate on which the control element is mounted; 
 a cup-shaped substrate holder that has a window portion for inserting the control element thereinto, open on an opposed surface of the substrate holder, which is opposed to the heat sink, and holds the circuit substrate; and 
 a molding material that is filled in the substrate holder so as to mold the circuit substrate and the control element. 
 
     
     
         4 . The air conditioner according to  claim 3 , wherein
 the heat sink has a guide groove that is recessed therein so as to extend in one direction, and the substrate holder has a fitting portion to be fitted into the guide groove,   a width between both side walls of the guide groove is set to be greater at least part of a region between the side walls than at an open surface of the guide groove, and   through fitting between the guide groove and the fitting portion, the substrate holder is guided to be slid in the one direction.   
     
     
         5 . The air conditioner according to  claim 4 , wherein
 an engaging protrusion is provided on the opposed surface of the substrate holder, and an engaging hole is provided in the heat sink, which is engaged with the engaging protrusion so that positioning of the heat sink and the substrate holder relative to each other is performed.   
     
     
         6 . The air conditioner according to  claim 3 , wherein
 the control element is fastened to the heat sink with a screw, and a groove portion into which the control element is fitted is recessed in the heat sink.   
     
     
         7 . The air conditioner according to  claim 1  or  2 , wherein
 an opening portion is formed on one of wall surfaces of the air passage in the longitudinal direction, and 
 a heat sink holder is provided that has an arm portion made of an elastic body and used to sandwich two circumferential surfaces of the heat sink, which are opposed to each other, and is mounted to the one of wall surfaces of the air passage by being fitted into the opening portion.