Air conditioner having electrical equipment box cooling mechanism

Abstract

In an air conditioner having an electrical equipment box mounted on the outer surface of a unit body in which an air blowing fan and an indoor heat exchanger are mounted, the electrical equipment box has an accommodating portion in which a control board is mounted, and a projecting portion that is connected to the accommodating portion so that the inside of the projecting portion intercommunicates with the inside of the accommodating portion and has an air inlet port and an air discharge port, and the unit body has an opening formed in the outer surface thereof through which the projecting portion of the electrical equipment box is inserted, the projecting portion being secured to the outer side surface of the unit body under the state that the projecting portion projects through the opening into an air flowing passage of the air blowing fan.

Description

INCORPORATION BY REFERENCE[0001]The present application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2007-192790 filed on Jul. 25, 2007. The content of the application is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an air conditioner having an electrical equipment box on the outside surface of an unit body set up in a ceiling space of a building or the like.[0004]2. Description of the Related Art[0005]There is known an air conditioner in which an electrical equipment box is provided on the outer surface of a unit body which is set up in a ceiling space of a building and contains a heat exchanger and an air blowing fan therein (for example, see Japanese Patent No. 2,562,675). In this type of air conditioner, the unit body is set up in the ceiling space, and thus air heat-exchanged by the heat exchanger in the unit body can be led to a proper position in a r...

AI Technical Summary

Benefits of technology

The present invention provides an air conditioner that can efficiently cool the electrical equipment box mounted on the outer surface of the unit body. This is achieved by introducing air into the projecting portion of the electrical equipment box through the opening in the outer surface of the unit body, where the air flows in and cools the electrical parts containing the control board, etc. This simplifies the cooling of the electrical equipment box, which is typically set in a ceiling space of a building.

Problems solved by technology

However, the electrical equipment box is disposed in the ceiling space together with the unit body, and thus even when the electrical equipment box is provided with an opening intercommunicating with the ceiling space, it is impossible to sufficiently cool the electrical equipment box.

In addition, the air in the ceiling space generally contains lots of dust, and thus a filter for removing dust is required to be provided at the opening of the electrical equipment box, so that the construction of the electrical equipment box is cumbersome.

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