Fluid heater
First Claim
1. A heating element, comprising:
- first and second bus plates, and a plurality of positive temperature coefficient elements in electrical contact with, and sandwiched between the bus plates in an electrically parallel configuration, each positive temperature coefficient element including;
first and second conductive plates, and a plurality of positive temperature coefficient heating stones in electrical contact with, and sandwiched between the conductive plates in an electrically parallel configuration.
1 Assignment
0 Petitions
Accused Products
Abstract
A fluid heater having a first heat exchanger block with a fluid heating tube encased therein, and having a first surface, a second heat exchanger block with a fluid heating tube encased therein and having a second surface adjacent to the first surface. A cavity is formed in the surface of the first block, or, alternatively, formed in each of the surfaces of the first and second blocks. A heating element is positioned within the cavity and completely encapsulated by the first and second blocks. The heating element may include first and second bus plates and a plurality of PTC elements sandwiched between the bus plates in an electrically parallel configuration, each PTC element including first and second conductive plates, and a plurality of positive temperature coefficient heating stones sandwiched between the conductive plates in an electrically parallel configuration.
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Citations
32 Claims
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1. A heating element, comprising:
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first and second bus plates, and a plurality of positive temperature coefficient elements in electrical contact with, and sandwiched between the bus plates in an electrically parallel configuration, each positive temperature coefficient element including;
first and second conductive plates, and a plurality of positive temperature coefficient heating stones in electrical contact with, and sandwiched between the conductive plates in an electrically parallel configuration. - View Dependent Claims (2)
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3. A fluid heater, comprising:
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a first heat exchanger block having a first surface; and
heating element having a second surface in thermal contact with the first surface, the heating element including first and second bus plates and a plurality of positive temperature coefficient elements in electrical contact with, and sandwiched between the bus plates in an electrically parallel configuration, each positive temperature coefficient element including;
first and second conductive plates, and a plurality of positive temperature coefficient heating stones in electrical contact with, and sandwiched between the conductive plates in an electrically parallel configuration. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A fluid heater, comprising:
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a first heat exchanger block having therein a fluid heating tube, the first block having a first surface;
a second heat exchanger block having therein a fluid heating tube, the second block having a second surface, and the second block positioned, relative to the first block, such that the first and second surfaces are adjacent to each other;
a cavity formed in the first surface, the cavity having a third surface on an inner face thereof; and
a heating element having fourth and fifth surfaces on opposing sides thereof positioned within the cavity with the fourth surface in face to face contact with the third surface and the fifth surface in face to face contact with the second surface, the heating element being fully encapsulated within the cavity. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A fluid heater, comprising:
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a first heat exchanger block having therein a fluid heating tube, the first block having a first surface;
a second heat exchanger block having therein a fluid heating tube, the second block having a second surface, and the second block positioned, relative to the first block, such that the first and second surfaces are adjacent to each other;
a first cavity formed in the first heat exchanger block in the first surface;
a second cavity formed in the second heat exchanger block in the second surface, the second cavity positioned such that, when the first and second surfaces are in face to face contact, the first and second cavities are opposite one another and form a chamber between the first and second blocks; and
a heating element fully encapsulated within the chamber. - View Dependent Claims (17, 18, 19)
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20. A fluid heater, comprising:
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a heating element having first and second surfaces on opposing sides thereof, the heating element including;
first and second bus plates, and a plurality of positive temperature coefficient heating elements in electrical contact with, and sandwiched between the bus plates in an electrically parallel configuration, each positive temperature coefficient element including;
first and second conductive plates, and a plurality of positive temperature coefficient heating stones in electrical contact with, and sandwiched between the conductive plates in an electrically parallel configuration;
a first heat exchanger block having a fluid heating tube therein, the first block having a third surface;
a second heat exchanger block having a fluid heating tube therein, the second block having a fourth surface; and
the first and second blocks and the heating element positioned such, that the first and second surfaces are in face to face contact with the third and fourth surfaces, respectively, with the heating element sandwiched therebetween. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A method for heating a fluid, comprising:
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introducing a fluid into a first end of a first tube encased in a first block of thermally conductive material having a surface;
extracting the fluid from a second end of the tube;
introducing the fluid into a first end of a second tube encased in a second block of thermally conductive material having a surface, the first and second blocks arranged such that the respective surfaces are adjacent; and
applying a voltage to a heating element fully encapsulated in a cavity between the first and second blocks, thereby;
heating the element, the thermally conductive material of the first and second blocks in contact therewith, and the first and second tubes, and heating the fluid. - View Dependent Claims (30, 31, 32)
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Specification