Evaporator burner arrangement for a mobile heater operated with liquid fuel

Patent metadata

Field	Value
Publication number	US-10302298-B2
Application number	US-201515127306-A
Country	US
Kind code	B2
Filing date	Mar 11, 2015
Priority date	Mar 20, 2014
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

An evaporator burner arrangement ( 100 ) for a mobile heater operated with liquid fuel having: a mixture preparation region ( 2 ) for generating a fuel-air-mixture, a fuel evaporation surface ( 8 ) arranged in the mixture preparation region ( 2 ) for evaporating the liquid fuel, a combustion air supply (B) for supplying combustion air to the mixture preparation region ( 2 ), a fuel supply ( 1 ) for supplying liquid fuel to the fuel evaporation surface ( 8 ), a conversion region ( 3 ) being arranged fluidically downstream of the mixture preparation region ( 2 ) for converting the fuel-air mixture in order to release heat, and a heat conductor body ( 7 ) extending spaced from a sidewall ( 25 ) of the mixture preparation region ( 2 ) through the mixture preparation region ( 2 ) to the conversion region ( 3 ) for feeding-back heat from the conversion region ( 3 ) to the mixture preparation region ( 2 ) by thermal conductance

First claim

The invention claimed is:

1. An evaporator burner arrangement for a mobile heater operated with liquid fuel, said burner arrangement comprising:
a mixture preparation region generating a fuel-air-mixture;
a fuel evaporation surface arranged in the mixture preparation region for evaporating the liquid fuel;
a combustion air supply supplying combustion air to the mixture preparation region;
a fuel supply supplying liquid fuel to the fuel evaporation surface;
a conversion region arranged fluidically downstream of the mixture preparation region for converting the fuel-air-mixture in order to release heat; and
a heat conductor body spaced from a sidewall of the mixture preparation region and extending through the mixture preparation region to the conversion region for feeding-back heat from the conversion region to the mixture preparation region by thermal conductance,
wherein the mixture preparation region includes a tapering portion tapering in a direction towards the conversion region and
wherein a widening of the cross-section is formed at a transition from the mixture preparation region to the conversion region.

2. The evaporator burner arrangement according to claim 1 , wherein the heat conductor body extends rod-shaped along a longitudinal axis (Z) of the mixture preparation region.

3. The evaporator burner arrangement according to claim 1 , wherein the combustion air supply includes a swirl body with which a swirl flow is impressed onto the supplied combustion air.

4. The evaporator burner arrangement according to claim 1 , wherein a sidewall of the mixture preparation region is thermally insulated with regard to the conversion region.

5. The evaporator burner arrangement according to claim 1 , wherein the fuel evaporation surface is formed by an exposed sidewall of the mixture preparation region.

6. The evaporator burner arrangement according to claim 5 , wherein the fuel evaporation surface is formed by the exposed sidewall in the region of the tapering portion.

7. The evaporator burner arrangement according to claim 1 , wherein the fuel evaporation surface is formed by an evaporator body from an absorbent, porous material.

8. The evaporator burner arrangement according to claim 7 , wherein the evaporator body is arranged at an outer circumferential surface of the heat conductor body.

9. The evaporator burner arrangement according to claim 7 , wherein a cover is provided at an end of the evaporator body facing the conversion region.

10. The evaporator burner arrangement according to claim 1 , wherein a support air supply is provided for supplying a portion of the combustion air in a transition portion via which the mixture preparation region transitions into the conversion region.

11. The evaporator burner arrangement according to claim 1 , wherein a transition portion via which the mixture preparation region transitions into the conversion region is provided with a variation in cross-section for improving the flow-off profile.

12. The evaporator burner arrangement according to claim 1 , wherein the heat conductor body extends into the conversion region.

13. A mobile heater operated with liquid fuel having an evaporator burner arrangement according to claim 1 .

14. The mobile heater operated with liquid fuel according to claim 13 which is formed as a vehicle heater for a parking heater or supplementary heater.

Assignees

• Webasto SE

Inventors

• Ilchenko Volodymyr
• Zoske Martin
• Poehner Michael
• Dell Vitali
• Moesl Klaus
• Sommerer Stefan
• Kerscher Thomas

Classifications

• F23D5/123 Primary

  Inserts promoting evaporation · CPC title

• B60H2001/2271

  Heat exchangers, burners, ignition devices · CPC title

• F23D2900/05002

  Use of porous members to convert liquid fuel into vapor · CPC title

• B60H1/2203

  the heat being derived from burners · CPC title

• F23D2900/14241

  Post-mixing with swirling means · CPC title