Ceiling-embedded ventilation fan

Abstract

In a ceiling-embedded ventilation fan, a connection opening is formed in a side surface of a circuit case, an upper part of the connection opening and a side surface of the circuit case are covered with a shade, a bottom part of the shade is arranged at a position lower than an insertion hole of the connection opening, a drain board is arranged under the insertion hole in a frontal view of the insertion hole viewed from an end face of the shade in parallel with the top surface, and the drain board has a downward slope from a side of the connection terminal to a side of the power supply electric wire.

1 . A ceiling-embedded ventilation fan comprising:
 a frame configured by a top surface, a side surface and a lower surface, and having a suction opening in the lower surface and a discharge opening in the side surface;   a motor fixed to the top surface;   a fan driven by the motor;   a casing that covers a circumference of the fan;   a control circuit that is mounted on the top surface and drives and controls the motor; and   a circuit case that stores the control circuit therein,   wherein a side surface of the circuit case has a connection opening for a connection terminal that connects the control circuit and a power supply electric wire, an upper part of the connection opening and the side surface of the circuit case are covered with a shade, a bottom part of the shade is arranged at a position lower than an insertion hole of the connection opening, a drain board is arranged under the insertion hole in a frontal view of the insertion hole viewed from an end face of the shade in parallel with the top surface, and the drain board has a downward slope from a side of the connection terminal to a side of the power supply electric wire.   
     
     
         2 . The ceiling-embedded ventilation fan according to  claim 1 ,
 wherein, in a space covered with the shade of the upper part of the connection opening and the side surface of the circuit case, a wall is arranged at a position between the insertion holes, the wall extending from the side of the connection terminal to a side of the drain board and from a level of the drain board to the shade, and the wall is formed such that a thickness on the side of the connection terminal is larger than a thickness on the side of the drain board.   
     
     
         3 . The ceiling-embedded ventilation fan according to  claim 1 ,
 wherein a drain hole is formed in the circuit case, and a rib has a upward slope extending from an outlet port of the drain hole to the inside of the circuit case.   
     
     
         4 . A ceiling-embedded ventilation fan comprising:
 a frame configured by a top surface, a side surface and a lower surface, and having a suction opening in the lower surface and a discharge opening in the side surface;   a DC motor fixed to the top surface;   a fan driven by the DC motor;   a fan casing that covers a circumference of the fan;   a control circuit that is mounted on the top surface and drives and controls the DC motor; and   a circuit case that stores the control circuit therein,   wherein the DC motor includes a connector connecting unit connected to the control circuit, and the connector connecting unit is arranged to be upward perpendicularly to the top surface.   
     
     
         5 . The ceiling-embedded ventilation fan according to  claim 4   comprising a cover that covers the connector connecting unit and an upper part of a connector connected to the connector connecting unit.   
     
     
         6 . The ceiling-embedded ventilation fan according to  claim 5 ,
 wherein the cover is formed integrally with the circuit case.   
     
     
         7 . The ceiling-embedded ventilation fan according to  claim 2 ,
 wherein a drain hole is formed in the circuit case, and a rib has a upward slope extending from an outlet port of the drain hole to the inside of the circuit case.