Coil unit for linear motor

A coil unit for a linear motor comprising:

• a shell for storing a coil of the coil unit inside while maintaining a predetermined gap to the coil, and for using a refrigerant to cool the coil;
• an outer cover for storing the shell inside while maintaining a second predetermined gap, and for passing the refrigerant through the second gap for cooling said shell;
• a first outer main flow passage, formed in the vicinity of one edge in the widthwise direction of the shell inside the outer cover while extending in the lengthwise direction, for leading the refrigerant supplied from the outside into itself, and for draining the refrigerant to an outer surface of the shell in the widthwise direction;
• a second outer main flow passage, formed in the vicinity of the other edge in the widthwise direction of the shell inside said outer cover while extending in the lengthwise direction, for receiving the refrigerant having flown in the widthwise direction on the outer surface of the shell after flowing through the first outer main flow passage, and supplying said refrigerant into the shell;
• and
• a draining pipe for draining the refrigerant having flown on a surface of the coil inside the shell to the outside.

A coil unit comprising:

• a shell for a linear motor, the shell storing a coil of the coil unit inside while maintaining a predetermined gap to the coil, and for using a refrigerant to cool the coil;
• an outer cover for storing the shell inside while maintaining a second predetermined gap, and for passing said refrigerant through the second gap for cooling the shell;
• a first guiding path, formed in the vicinity of one edge in a widthwise direction of the coil inside the shell while extending in a lengthwise direction, for leading the refrigerant supplied from the outside into itself, and for leading out said refrigerant in the widthwise direction on a surface of the coil;
• a second guiding path, formed in the vicinity of the other edge in the widthwise direction of the coil while extending in the lengthwise direction, for receiving the refrigerant having flown in the widthwise direction on the surface of the coil after the first guiding path, and for supplying said refrigerant into the second gap between the shell and the outer cover;
• and
• a draining hole for draining the refrigerant having flown on an outer surface of the shell to the outside.

A coil unit, comprising:

• a shell for a linear motor, the shell comprising a coil stored therein, a main flow passage, a plurality of branch passages, and a predetermined gap maintained between the shell and the coil;
• and
• a refrigerant that cools the coil,
• wherein the main flow passage extends within the shell and in a lengthwise direction of the coil,
• wherein the refrigerant is supplied from outside the shell and through the main flow passage,
• wherein the plurality of branch flow passages extend from the main flow passage in a widthwise direction of the coil and drain the refrigerant from the main flow passage,
• wherein each branch flow passage is separate from a neighboring branch flow passage by a predetermined interval in the lengthwise direction of the coil,
• wherein the refrigerant drained from the plurality of branch flow passages, after flowing through the main flow passage, flows through the predetermined gap maintained between the shell and the coil.

A coil unit comprising:

• a shell for a linear motor;
• a coil disposed in the shell;
• a first predetermined gap maintained between the shell and the coil;
• an outer cover, wherein the shell is disposed within the outer cover;
• a second predetermined gap maintained between the outer cover and the shell;
• a first outer main flow passage formed between an interior surface of the outer cover and a first edge of the shell, wherein the first outer main flow passage extends in a lengthwise direction of the coil;
• a second outer main flow passage formed between the interior surface of the outer cover and a second edge of the shell,
• wherein the second edge of the shell is disposed at an opposite end relative to the first edge, wherein the second outer main flow passage extends in the lengthwise direction of the coil, wherein a refrigerant is supplied to the first outer main passage from outside the outer cover, flows through the first outer main passage, and drains onto an outer surface of the shell in a widthwise direction of the coil, wherein the refrigerant also flows through the second predetermined gap and cools the shell, wherein the second outer main flow passage receives the refrigerant having flown over the shell and through the second predetermined gap and supplies the refrigerant to an interior of the shell, and wherein the refrigerant flows through the first predetermined gap and over a surface of the coil to coot the coil;
• and
• a draining pipe which drains the refrigerant having flown on the surface of the coil to the outside of the outer cover.

A coil unit comprising:

• a shell for a linear motor;
• a coil disposed within the shell;
• a first predetermined gap maintained between the shell and the coil, wherein a refrigerant flows through the first predetermined gap to cool the coil;
• an outer cover, wherein the shell is disposed within the outer cover;
• a second predetermined gap maintained between the outer cover and the shell, wherein the refrigerant flows through the second predetermined gap to cool the shell;
• a first guiding path formed in a vicinity of a first widthwise edge inside the shell, wherein the first guiding path extends in a lengthwise direction of the coil;
• a second guiding path formed in a second widthwise edge inside the shell, wherein the second guiding path extends in the lengthwise direction of the coil,
• wherein the first guiding path receives the refrigerant from outside the outer cover and supplies the refrigerant onto a surface of the coil in a widthwise direction, and wherein the second guiding path receives the refrigerant supplied onto the surface of the coil and supplies the refrigerant into the second predetermined gap;
• and
• a draining hole that drains the refrigerant having flown on an outer surface of the shell to the outside of the outer cover.