Magnetic device for magneto caloric heat pump regenerator
First Claim
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1. A magnetic device for a magnetocaloric heat pump, comprising:
- an outer magnetic flux circuit, comprisinga first plurality of magnets arranged in pairs along a circumferential direction of the device with magnet polarity of the pairs alternating between north poles facing inward and north poles facing outward from pair to pair along the circumferential direction;
an inner magnetic flux circuit located radially inward from the outer magnetic flux circuit and comprisinga second plurality of magnets arranged along the circumferential direction and spaced apart from each other; and
wherein the outer magnetic circuit and the inner magnetic circuit create at least four fields of increased magnetic flux density between the outer magnetic circuit and the inner magnetic circuit.
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Abstract
A magnetic device is provided for a magneto caloric heat pump regenerator. Magnets are arranged within two magnetic flux circuits in a manner than that provides at least four fields of increased magnetic flux density. The regenerator can be used to move working units of magneto caloric material through the fields of increase magnetic flux to provide for heating and cooling as part of heat pump cycle. The orientation of the magnets provides concentrated fields of magnetic flux to induce the magneto caloric effect while optimizing the size of the magnets required to create the fields.
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Citations
18 Claims
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1. A magnetic device for a magnetocaloric heat pump, comprising:
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an outer magnetic flux circuit, comprising a first plurality of magnets arranged in pairs along a circumferential direction of the device with magnet polarity of the pairs alternating between north poles facing inward and north poles facing outward from pair to pair along the circumferential direction; an inner magnetic flux circuit located radially inward from the outer magnetic flux circuit and comprising a second plurality of magnets arranged along the circumferential direction and spaced apart from each other; and wherein the outer magnetic circuit and the inner magnetic circuit create at least four fields of increased magnetic flux density between the outer magnetic circuit and the inner magnetic circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A regenerator for a magnetocaloric heat pump, comprising:
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an outer magnetic flux circuit, comprising a first plurality of magnets arranged in pairs along a circumferential direction of the heat pump with magnet polarity of the pairs alternating between north poles oriented inward and north poles oriented outward from pair to pair along the circumferential direction; an inner magnetic flux circuit located radially inward from the outer magnetic flux circuit and comprising a second plurality of magnets arranged along the circumferential direction and spaced apart from each other; wherein the outer magnetic circuit and the inner magnetic circuit create at least four fields of increased magnetic flux density along an annulus positioned between the outer magnetic circuit and the inner magnetic circuit; and a plurality of working units arranged adjacent to each along the circumferential direction and extending between a first end of the regenerator and a second end of the regenerator, each working unit comprising magneto caloric material, wherein the working units are rotatable relative to the outer and inner magnetic flux circuits. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification