Abstract

The present invention relates to a field coil assembly of an electromagnetic clutch for a compressor. The present invention comprises a core 210, and a coil 240 installed to the core 210 and formed by winding a unit wire 250. At this time, the unit wire 250 wound on the coil 240 is made of aluminum, and an area ratio R of an inner sectional area M of the core 210 to a cross-sectional area of the unit wire 250 is 400 to 640. According to the present invention as above, since the unit wire 250 used for the coil 240 is made of aluminum with a small specific weight and low price rather than copper, the weight of the field coil assembly 200 is decreased to improve fuel efficiency of a vehicle and decrease a production cost of the field coil assembly 200.

IPC Classes  ?

• F16D 27/00 - Magnetically-actuated clutchesControl or electric circuits therefor
• F16D 27/02 - Magnetically-actuated clutchesControl or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings
• F16D 27/10 - Magnetically-actuated clutchesControl or electric circuits therefor with an electromagnet not rotating with a clutching member, i.e. without collecting rings
• F16D 27/14 - Magnetically-actuated clutchesControl or electric circuits therefor Details
• H01F 5/00 - Coils

Abstract

The present invention relates to an evaporator, and more particularly, to an evaporator which can restrict a surface area of a communication hole with respect to a cross sectional area of a compartment and a surface area of a tube with respect to a surface area of a fin, thereby providing a dimensional extent for maximizing the heat exchange efficiency. Therefore, by optimizing a relation between the surface area of the communication portion and the surface area of the compartment of the first header tank and dimensions for each surface area and the heights of the tube and fin, the present invention provides a dimensional extent for maximizing the heat radiation amount, reducing the maximum temperature deviation of the core portion and allowing the refrigerant and air to be smoothly flowed, thereby maximizing the heat exchange efficiency.

IPC Classes  ?

• F25B 39/02 - Evaporators
• F28F 9/00 - CasingsHeader boxesAuxiliary supports for elementsAuxiliary members within casings