Scroll heating device

Patent metadata

Field	Value
Publication number	US-11480133-B2
Application number	US-202117140617-A
Country	US
Kind code	B2
Filing date	Jan 4, 2021
Priority date	Nov 2, 2020
Publication date	Oct 25, 2022
Grant date	Oct 25, 2022

Abstract

A scroll heating device includes a base, a reaction region, and a first and a second channel. The reaction region is at the center of the base. The two channels are located on the base and extend spirally from the reaction region toward the periphery of the base. The width of each channel is gradually reduced as the channel extends from adjacent to the center of the base toward the periphery of the base. The first channel allows a gas that flows into the first channel through the periphery of the base toward the center of the base to flow toward the reaction region at a progressively slower rate, enter the reaction region slowly through the gradually widening first channel, and therefore stay in the reaction region for longer. The combusted exhaust enters the second channel from adjacent to the center of the base and exits through the periphery of the base.

First claim

What is claimed is:

1. A scroll heating device, comprising:
a base;
a reaction region located at a center of the base; and
a first channel and a second channel, both located on the base and extending outward of the reaction region, where each of the first channel and the second channel extends spirally from a starting point defined by the reaction region toward a periphery of the base, and each of the first channel and the second channel has a width that is gradually reduced as each channel extends from a position adjacent to the center of the base toward the periphery of the base, such that both the first channel and the second channel become narrower toward the periphery of the base and wider toward the center of the base;
wherein when a gas flows from a first end of the first channel that is located at the periphery of the base toward a second end of the first channel that is adjacent to the center of the base, the first channel allows the gas to flow toward the reaction region at a progressively slower rate and then enter the reaction region slowly through the first channel, which gradually widens toward the center of the base, thereby increasing a time for which the gas stays in the reaction region, and wherein a combusted exhaust flows into a third end of the second channel that is adjacent to the center of the base and exits through a fourth end of the second channel that is located at the periphery of the base.

2. The scroll heating device of claim 1 , wherein the first channel and the second channel are arranged according to one or a combination of a Fermat's spiral configuration, a Vogel spiral configuration, and an Archimedean spiral configuration.

3. The scroll heating device of claim 2 , wherein the base includes a gas inlet provided at the periphery of the base and in communication with the first channel and a gas outlet provided at the periphery of the base and in communication with the second channel, and the gas inlet and the gas outlet are located diametrically opposite each other.

4. The scroll heating device of claim 3 , further comprising:
a plurality of pin fins, wherein the base further includes two opposite sides defined respectively as a first side and a second side, the pin fins are located on the first side and are spaced apart from one another, and the first channel and the second channel are located on the second side.

5. The scroll heating device of claim 4 , further comprising:
a cover provided on the second side to close the first channel and the second channel.

6. The scroll heating device of claim 5 , wherein the second end of the first channel is connected to the gas inlet, and the fourth end of the second channel is connected to the gas outlet.

7. The scroll heating device of claim 6 , wherein the first side and the second side define therebetween a thickness of 3 mm.

8. The scroll heating device of claim 7 , wherein the scroll heating device is made of a thermally conductive material, and the thermally conductive material is one or a combination selected from the group consisting of a metal, a metal alloy, and ceramic.

9. The scroll heating device of claim 8 , wherein the gas is one or a combination selected from the group consisting of dimethyl ether (DME), methane (CH 4 ), synthesis gas (syngas), natural gas, liquefied petroleum gas, and biogas.

10. The scroll heating device of claim 1 , wherein the scroll heating device is adapted for being coupled to a heating end of a Stirling engine.

Assignees

• Univ Nat Cheng Kung

Inventors

• Wu Chih-Yung
• Chen Wen-Lih

Classifications

• F23C3/00 Primary

  Combustion apparatus characterised by the shape of the combustion chamber · CPC title

• F23C13/08

  characterised by the catalytic material · CPC title

• F23C2900/99011

  Combustion process using synthetic gas as a fuel, i.e. a mixture of CO and H2 · CPC title

• F02G2258/10

  ceramic · CPC title

• F02G2254/18

  using deflectors, e.g. spirals · CPC title