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| Heat pump output indicator |
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| Deep fat fryer |
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Microwave water heating method and apparatus
| Details |
Inventors: Black, Jerimiah B.;
Assignee:
Primary Examiner: Reynolds; B. A.
Assistant Examiner: Leung; Philip H.
Attorney, Agent or Firm: Wigman & Cohen
A method of and apparatus for heating liquids such as water utilizing microwave energy is disclosed. A microwave fluid heater system comprising a microwave-transparent fluid conductor body is arranged in a microwave-reflective and heat-insulated chamber. The conductor body is provided with a plurality of passages through which the fluid to be heated flows. At least one microwave source is arranged in one wall of the microwave chamber to radiate the fluid conductor body so that fluid passing through the passages in the body is heated primarily by absorption of microwave energy. A water distribution system for a building is also disclosed in which a plurality of microwave fluid heaters are arranged at different locations, each heater being adapted to supply hot or cold water independently of the other heaters. |
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DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT Referring now in detail to the drawings, there is illustrated in FIG.
1 a preferred embodiment of the microwave fluid heating system of the present invention which is designated generally by reference numeral 10.
The system 10 is sufficiently compact, e.
g.
, about one cubic foot, so as to be conveniently and readily connected in-line with the potable water supply line of a residence or business.
In the illustrated embodiment, the system 10 is arranged between a pair of conventional shut-off valves comprising a cold water inlet valve 12 connected to water supply line 14 and a hot water outlet valve 16, which may be a domestic hot water tap, connected to the hot water line 17 from the microwave water heater system.
System 10 includes a microwave chamber 18 which encloses at least one fluid conductor 20 through which the fluid to be heated, e.
g.
, water, passes.
The chamber 18 comprises a shell 22 formed of microwave reflective material, such as sheet metal, surrounded by a suitable heat insulating layer 24 and a further exterior housing or enclosure 26 which is made of a rigid plastic or metal material, such as fiberglass or aluminum.
The fluid conductor 20 is provided with a tubular inlet 28 and tubular outlet 30 which are sealingly supported in a pair of flanges 32, 34, respectively, mounted in opposite sidewalls of the microwave chamber 18.
If desired, the inlet and outlet may pass through any wall and the space between the fluid conductor 20 and the inner reflective shell 22 may advantageously be provided with a shock-absorbing support which must be substantially transparent to microwave radiation and also have good thermal insulation properties.
Microwave energy for heating the water passing through fluid conductor 20 from inlet 28 to outlet 30 is generated by a microwave generator 36 which may be either a magnetron or a klystron tube.
The microwave generator 36 is arranged in a waveguide 38 integrally formed with the microwave chamber 18
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