Electric refrigeration compressor having a cooling system for an electrical circuit

An electrical compressor for a refrigeration circuit comprising:

• a compression portion, which draws and compresses refrigerant circulating in the refrigeration circuit;
• an electrical motor that drives the compression portion;
• a housing for accommodating the electrical motor, wherein the housing includes:
• a cylindrical outer surface;
• a planar seat surface for receiving a casing, which is attached to the housing;
• and
• a refrigerant passage through which the refrigerant passes, such that the refrigerant passes through and cools the electrical motor when being drawn by the compression portion;
• and
• an electrical circuit for driving the electrical motor, wherein the electrical circuit includes a plurality of electrical members, wherein a space is formed between the cylindrical outer surface and a plane defined by the planar seat surface, and the electrical members occupy the space and are located in close proximity to the cylindrical outer surface such that heat generated by the electrical members is transferred to the refrigerant passing through the motor, wherein:
• the plane is a first plane, and a second plane includes the axis of the motor and is perpendicular to the first plane;
• the space is a first space, and a second space, which is located between the outer cylindrical surface and the first plane, is provided on an opposite side of the second plane;
• and
• the plurality of electrical members is a first plurality of electrical members, and a second plurality of electrical members of the electrical circuit occupies the second space, such that heat generated by to second plurality of electrical members is transferred to the refrigerant passing through the motor.

An electrical compressor for a refrigeration circuit comprising:

• a compression portion, which draws and compresses refrigerant circulating in the refrigeration circuit;
• an electrical motor that drives the compression portion;
• a housing for accommodating the compression portion and the electrical motor, wherein the housing includes a refrigerant inlet into which the refrigerant is introduced, and a refrigerant passage, through which the refrigerant from the refrigerant inlet flows toward the compression portion, wherein the refrigerant passage conducts the refrigerant through the electrical motor towards the compression portion;
• an electrical circuit for driving the electrical motor;
• a casing for accommodating the electrical circuit, wherein:
• the housing has an outer cylindrical wall that defines an inner space of the casing, wherein the housing and the casing form a U-shape, and the inner space is formed between opposed legs of the U-shape;
• and
• the electrical circuit is located in the inner space of the casing in close proximity to the outer cylindrical wall such that heat generated by the electrical circuit is transferred to the outer cylindrical wall and to the refrigerant flowing through the refrigerant passage in the housing.