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A built-in heater for a thermoacoustic system and a composite heater containing the heater

A composite heater, thermoacoustic system technology, applied in the directions of air heaters, fluid heaters, lighting and heating equipment, etc., can solve problems such as breakage, affecting the performance of heaters and long-term reliability, and increase the heat exchange area. , The effect of saving experimental workload and convenient assembly and disassembly

Active Publication Date: 2021-05-18
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the internal heating method is that the working gas is directly in contact with the surface of the hot heating wire for heating. Since the gas repeatedly impacts the heating wire back and forth in the thermoacoustic system, the heating wire is prone to breakage when it is close to the melting point at high temperature. Can affect heater performance and long-term reliability

Method used

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  • A built-in heater for a thermoacoustic system and a composite heater containing the heater
  • A built-in heater for a thermoacoustic system and a composite heater containing the heater
  • A built-in heater for a thermoacoustic system and a composite heater containing the heater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like Figure 1-Figure 2 As shown, the built-in ceramic heater for the thermoacoustic system consists of 6 (N=6) concentric annular structures 1, 6 fluid flow channels 2, a central cylinder 3, and a cross-shaped connecting frame 4. The central cylinder can be perforated to insert a thermocouple to measure the heater temperature in real time. Six concentric annular structures with different diameters are placed concentrically with the central cylinder to form a concentric multi-circle loop structure, and there are six annular fluid flow channels between the concentric multi-circle loops.

[0040] The cross-shaped connecting frame 4 adopts interference fit to connect all concentric annular structures in a specific way as follows: the cross-shaped connecting frame has a height of 2mm, and the diameter of the middle circle of the connecting frame is the same as the central cylinder of the heater. There are ceramic plates extending to the inner diameter of the outermost ring...

Embodiment 2

[0044] like image 3 As shown, the built-in ceramic heater for the thermoacoustic system consists of 6 (N=6) concentric annular structures 1, 6 fluid channels 2, a central cylinder 3, and a straight-shaped connecting frame 4. The central cylinder can be perforated to insert a thermocouple to measure the heater temperature in real time. Six concentric annular structures with different diameters are placed concentrically with the central cylinder to form concentric multi-circle loops, and there are six annular fluid channels between the concentric multi-circle loops.

[0045] The inline-shaped connecting frame 4 adopts welding to connect all the concentric annular structures in the specific manner as follows: the inline-shaped connecting frame is composed of several alloy blocks, and the ceramic material on the surface of the concentric annular structure is pre-metallized, and then the inline-shaped The alloy block in the connecting frame is placed in the fluid flow channel in ...

Embodiment 3

[0047] like Figure 4 As shown, the built-in ceramic heater for the thermoacoustic system is composed of 6 concentric annular structures 1, 6 fluid flow channels 2, a central cylinder 3, and a connecting frame 4 in the shape of a three-pointed star. The central cylinder can be perforated to insert a thermocouple to measure the heater temperature in real time. Six concentric annular structures with different diameters are placed concentrically with the central cylinder to form concentric multi-circle loops, and there are six annular fluid channels between the concentric multi-circle loops.

[0048] The three-pointed star-shaped connecting frame 4 adopts interference fit to connect all concentric annular structures in the following specific ways: the height of the connecting frame is 2mm, the diameter of the middle circle is the same as the central cylinder of the heater, and the horizontal direction and the horizontal direction are plus or minus 120 There are ceramic plates ex...

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Abstract

The invention discloses a built-in heater for a thermoacoustic system and a composite heater containing the heater. The built-in heater includes one or more sub-heaters, and the sub-heaters include N concentric annular structures ( 1), the central cylinder (3) and the connecting frame (4); the N concentric ring structures (1) are concentrically arranged from small to large in diameter to form a concentric multi-circle loop, and the central cylinder (3) is arranged on the concentric In the center of the multi-circle loop, the connecting frame (4) connects and fixes N concentric annular structures (1) and the central cylinder (3); between any two concentric annular structures in the concentric multi-circle loop Form the fluid flow channel (2); embed electric heating wires on the surface of the concentric ring structure of one or both sides of the fluid flow channel (2); when the built-in heater is a plurality of sub-heaters, the plurality of sub-heaters They are connected through bosses and grooves. The invention has long-term reliability and is convenient for assembly and disassembly.

Description

technical field [0001] The patent of the present invention mainly relates to a built-in ceramic heater for a thermoacoustic system. The heater can be used as a form of hot-end heat exchanger for heating of moving and non-moving fluids inside pipes of various thermoacoustic systems. Background technique [0002] The thermoacoustic effect refers to the time-average energy conversion that occurs when the compressible fluid working medium (the first medium) undergoes acoustic vibrations in the thermoacoustic system and the solid working medium (the second medium) undergoes thermal interaction. effect. It is caused by the interaction between the solid working medium in the sound field and the oscillating fluid working medium, which generates time-average heat flow and time-average work flow along (or against) the sound propagation direction within a certain range from the solid wall. A thermoacoustic system is a system that can convert heat and sound based on the thermoacoustic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H3/00F24H9/18
CPCF24H3/002F24H9/1863F24H2250/02
Inventor 谢秀娟刘丰豪杨少柒
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI