초록 ▼

Apparatus for cooling the power electronics components of a variable frequency drive for the motor of a refrigerant system compressor. The components are mounted upon a heat sink and refrigerant from the system condenser is passed through the heat sink by means of a flow line and returned to the low

Apparatus for cooling the power electronics components of a variable frequency drive for the motor of a refrigerant system compressor. The components are mounted upon a heat sink and refrigerant from the system condenser is passed through the heat sink by means of a flow line and returned to the low pressure side of the system. A control valve is mounted in the flow line which throttles refrigerant passing through the line to produce cooling of the heat sink to maintain the temperature of the components within a desired range.

대표청구항 ▼

[ What is claimed is:] [1.] Cooling apparatus for the power electronics of a variable frequency drive used to control the motor of a compressor in a refrigeration system that includesa refrigeration system that further includes a compressor, a condenser, and an evaporator connected in series by refr

[ What is claimed is:] [1.] Cooling apparatus for the power electronics of a variable frequency drive used to control the motor of a compressor in a refrigeration system that includesa refrigeration system that further includes a compressor, a condenser, and an evaporator connected in series by refrigerant lines and an expansion means in one of said lines for throttling refrigerant moving between the condenser and the evaporator,a variable frequency drive means connected to the compressor motor, said drive means containing power electronic components that require cooling,a circuit for shunting a portion of the refrigerant from the system condenser to the compressor inlet,a variable frequency drive evaporator mounted in said circuit that is in heat transfer relation with the power electronics components of the variable frequency drive;a control valve in said circuit for expanding the refrigerant moving through said circuit from the system condenser pressure to the compressor inlet pressure whereby said power electronic components are cooled.