Magnetic heating and cooling device

A magnetic cooling and heating device comprising:

• a heat exchanger in which a magnetic body having a magnetocaloric effect is disposed;
• a magnetic field applying and removing unit to selectively apply to and remove from the magnetic body a magnetic field;
• and
• a liquid refrigerant moving unit that moves liquid refrigerant from a first end to a second end of the heat exchanger or from the second end to the first end to exchange heat with the magnetic body in the heat exchanger, a high-temperature side heat exchange portion formed at one of the first end or the second end and a low-temperature side heat exchange portion formed at another of the first end or the second end, wherein:
• the magnetic body is composed of at least one flat magnetic member having at least one flow passage that opens in a direction perpendicular to a direction of movement of the liquid refrigerant;
• an opening end of the flow passage has a corner;
• and
• the magnetic body is formed by arranging a flat magnetic member having higher magnetocaloric effect in a high-temperature range at the high-temperature side heat exchange portion while arranging a flat magnetic member having higher magnetocaloric effect in a low temperature range at the low-temperature side heat exchange portion.