Air conditioner

Abstract

A refrigerant gas sensor is typically attached so that an opening for introducing leaked refrigerant gas into the inside faces upward. With this arrangement, however, a small amount of a different gas such as propane and pesticide, which is sucked from the outside of an air conditioner, may be erroneously recognized as refrigerant gas. On this account, a refrigerant gas sensor 9 includes a detecting element 61 for detecting leakage of refrigerant gas and a casing member 62 provided to surround the detecting element 61. The casing member 62 has a casing opening (first opening) 62 a through which the refrigerant gas is introduced into the inside of the casing member 62. The casing opening (first opening) 62 a is below the detecting element 61.

1 . An air conditioner which uses flammable refrigerant and includes a refrigerant gas sensor inside the air conditioner, the refrigerant gas sensor including:
 a detecting element configured to detect leakage of refrigerant gas; and   a casing member provided to surround the detecting element, the casing member having a first opening through which the refrigerant gas is introduced into an inside of the casing member, and the first opening being below the detecting element.   
     
     
         2 . The air conditioner according to  claim 1 , wherein, the refrigerant gas sensor includes a printed board having a lower surface to which the detecting element is fixed, and the casing member is a cylindrical member fixed to the lower surface of the printed board. 
     
     
         3 . The air conditioner according to  claim 2 , further comprising a surrounding member surrounding circumferences of the printed board and the casing member, a second opening being formed in a bottom surface of the surrounding member. 
     
     
         4 . The air conditioner according to  claim 1 , wherein, the refrigerant gas sensor includes a printed board having a lower surface to which the detecting element is fixed, the casing member covering a circumference of the printed board.