초록

A furnace includes a motor in a motor housing that drives a fan that draws heated air through a heat exchanger of the furnace and also draws a flow of air through the motor housing to cool the motor as well as the motor housing.

대표청구항 ▼

[ What is claimed is:] [3.]3. A furnace comprising:a motor in a motor housing, the motor housing having at least one motor housing inlet and at least one motor housing outlet;a combustion chamber having at least one combustion chamber inlet and a combustion chamber outlet, the at least one combustio

[ What is claimed is:] [3.]3. A furnace comprising:a motor in a motor housing, the motor housing having at least one motor housing inlet and at least one motor housing outlet;a combustion chamber having at least one combustion chamber inlet and a combustion chamber outlet, the at least one combustion chamber inlet being operatively connected to and communicating with the at least one motor housing outlet;a heat exchanger having a heat exchanger inlet and a heat exchanger outlet, the heat exchanger inlet being operatively connected to and communicating with the combustion chamber outlet; anda fan driven by the motor and residing in a fan housing, the fan housing having a fan housing inlet and a fan housing outlet, the fan housing inlet being operatively connected to and communicating with the heat exchanger outlet, the fan causing a flow of air to flow into the motor housing through the at least one motor housing inlet around the motor and exit the motor housing through the at least one motor housing outlet and flow into the combustion chamber through the at least one combustion chamber inlet and exit the combustion chamber through the combustion chamber outlet and flow into the heat exchanger through the heat exchanger inlet and exit the heat exchanger through the heat exchanger outlet and flow into the fan housing through the fan housing inlet and exit the fan housing through the fan housing outlet, the flow of air thereby cooling the motor as it flows through the motor housing.