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Fluid heater with finite element control

A heater and controller technology, applied in fluid heaters, water heaters, lighting and heating equipment, etc.

Active Publication Date: 2021-01-26
OHMIQ INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of ohmic heater can only be selected from a specific set of resistances determined by the physical construction of the electrodes and a stepped heating rate

Method used

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  • Fluid heater with finite element control
  • Fluid heater with finite element control
  • Fluid heater with finite element control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A heater ( FIG. 1 ) according to one embodiment of the invention comprises a structure 12 comprising a hollow shell 13 . Electrodes 14 are mounted to the housing. As shown in Figure 2, each electrode is a generally rectangular flat plate having major surfaces 16 and 18 facing in opposite directions and edge surfaces extending between these major surfaces. Electrodes 14 are mounted in housing 13 such that spaces 20 are defined between adjacent electrodes. As used in this disclosure with reference to electrodes, the expression "adjacent" refers to a continuous space extending between two adjacent electrodes that is not interrupted by any other electrode. The major surfaces of the electrodes 14 face each other such that the electrodes are arranged in a stack with the major surface 18 of one electrode facing the opposing major surface 16 of an adjacent electrode. In this arrangement, the main surfaces of the electrodes are parallel to each other so that the distance betwe...

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PUM

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Abstract

An ohmic heater for heating a conductive fluid includes electrodes (14) and spaces (20) between the electrodes. A controller (52) selectively connects the electrodes to a power supply (36) during a succession of actuation intervals so as to form conduction paths, each including two live electrodes connected to different electrical potentials, and the fluid in one or more spaces. The controller models fluid passing through the spaces as a series of finite elements (100) moving through the spaces. Before each actuation interval, the controller estimates the expected results of actuating variouspossible conduction paths, including the estimated temperature of the fluid in the conduction paths and the estimated currents passing through the live electrodes. The controller selects a set of conduction paths for which the estimated results meet a set of constraints, and actuates only the selected conduction paths during the actuation interval.

Description

[0001] cross reference [0002] This application is a continuation of US Application No. 15 / 952,832, filed April 13, 2018, the disclosure of which is incorporated herein by reference. technical field Background technique [0003] The present disclosure relates to ohmic fluid heating devices and methods of heating fluids. Ohmic fluid heaters can be used to heat conductive fluids such as drinking water. Such heaters typically include a plurality of electrodes spaced apart from one another. The electrodes are in contact with the fluid to be heated such that the fluid fills the spaces between adjacent electrodes. Two or more electrodes are connected to a power source so that different potentials are applied to different electrodes. For example, where an ohmic heater is operated using normal AC mains, such as that available from a household mains plug, at least one electrode is connected to one pole carrying an AC potential, while at least one other electrode is connected to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H1/10F24H9/18
CPCF24H9/1818F24H1/106
Inventor 迈克尔·J·维科夫斯基韦斯顿·斯科特·卡特伦耶利米·M·卡拉汉
Owner OHMIQ INC