Vehicle heater

Patent metadata

Field	Value
Publication number	US-11046150-B2
Application number	US-201816105210-A
Country	US
Kind code	B2
Filing date	Aug 20, 2018
Priority date	Aug 21, 2017
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

A vehicle heater housing ( 46 ) has an inlet area ( 49 ), an outlet area ( 51 ) and an air flow space ( 47 ) for air to be heated with a burner chamber assembly unit ( 30 ), to be fed with combustion air and fuel. A heat exchanger area ( 11 ), including a heat exchanger housing ( 12 ), is elongated in the direction of a housing longitudinal axis (L) with an outer side ( 24 ) around which air flowing in the air flow space flows. Heat transfer ribs are on a side of the heat exchanger housing. The heater housing has a housing circumferential wall ( 56 ) and an outlet front wall area ( 58 ). The heat transfer ribs have a longitudinal edge ( 64 ) extending along the housing circumferential wall and a radial edge extending along the outlet front wall area. A distance of the radial edge from the outlet front wall area changes from radially outwards to radially inwards.

First claim

What is claimed is:

1. A vehicle heater comprising:
a heater housing comprising a housing circumferential wall defining an air flow space for air to be heated and comprising an inlet area for an inlet of air into the air flow space and an outlet area for an outlet of air from the air flow space, the heater housing having an outlet front wall area adjacent to the housing circumferential wall;
a burner chamber assembly unit to be fed with combustion air and fuel, the burner chamber assembly unit being disposed in the heater housing; and
a heat exchanger area comprised of a heat exchanger housing having an elongated configuration in a direction of a housing longitudinal axis and around which air flowing in the air flow space flows on an outer side and heat transfer ribs provided on the outer side of the heat exchanger housing, the heat transfer ribs having a longitudinal edge, extending along the housing circumferential wall, and a radial edge extending along the outlet front wall area, the radial edge of at least one of the heat transfer ribs being located axially opposite the outlet area with respect the direction of the housing longitudinal axis and the radial edge comprising a first radial edge area adjacent to the longitudinal edge of at least one of the transfer ribs with respect to a radially outward direction and a second radial edge area adjacent to the first radial edge area with respect to a radially inward direction, the second radial edge area being angled with respect to the first radial edge area and being oriented at a right angle or nearly at a right angle to the housing longitudinal axis, the housing circumferential wall having a cylindrical configuration at least in an area enclosing the heat exchanger housing and the outlet front wall area having a conically tapering configuration in at least some areas, wherein a distance of the radial edge of the at least one of the heat transfer ribs from the outlet front wall area changes from radially outwards to radially inwards in at least some areas such that the distance increases in the first radial edge area at least in the section extending along the conically tapering area of the outlet front wall area, wherein the longitudinal edge of the at least one of the heat transfer ribs is disposed at a constant distance to the housing circumferential wall in the direction of the housing longitudinal axis.

2. The vehicle heater in accordance with claim 1 , wherein the distance of the radial edge from the outlet front wall area increases, from radially outwards to radially inwards in at least some areas of each of the heat transfer ribs.

3. The vehicle heater in accordance with claim 1 , wherein the conically tapering area of the outlet front wall area is adjacent to the housing circumferential wall in a radially outward direction and is adjacent to a housing outlet section, providing an outlet opening of the outlet area and essentially cylindrical, in the radially inward direction.

4. The vehicle heater in accordance with claim 1 , wherein the radial edge extends essentially linearly in the area with varying distance to the outlet front wall area.

5. The vehicle heater in accordance with claim 1 , wherein the radial edge has an angle in the range of 5° to 15°, in relation to the outlet front wall area, in the area with varying distance to the outlet front wall area.

6. The vehicle heater in accordance with claim 1 , wherein the heat transfer ribs extend essentially linearly in the direction of the housing longitudinal axis.

7. The vehicle heater in accordance with claim 1 , wherein the heat exchanger housing comprises a circumferential wall area extending essentially in a direction of the housing longitudinal axis and a bottom wall area, disposed adjacent to the circumferential wall area and comprising a dome shape.

8. A vehicle heater comprising:
a heater housing comprising a housing circumferential wall defining an air flow space for air to be heated and comprising an inlet area for an inlet of air into the air flow space and an outlet area for an outlet of air from the air flow space, the heater housing having an outlet front wall area adjacent to the housing circumferential wall;
a burner chamber assembly unit to be fed with combustion air and fuel, the burner chamber assembly unit being disposed in the heater housing; and
a heat exchanger area comprised of a heat exchanger housing having an elongated configuration in a direction of a housing longitudinal axis and around which air flowing in the air flow space flows on an outer side and heat transfer ribs provided on the outer side of the heat exchanger housing, each of the heat transfer ribs having a longitudinal edge located radially opposite the housing circumferential wall, wherein the housing circumferential wall is located at a same distance from each and every portion of the longitudinal edge of at least one of the heat transfer ribs, the radial edge of the at least one of the transfer ribs being located axially opposite the outlet area with respect the direction of the housing longitudinal axis and the radial edge comprising a first radial edge area adjacent to the longitudinal edge of at least one of the transfer ribs with respect to a radially outward direction and a second radial edge area adjacent to the first radial edge area with respect to a radially inward direction, the second radial edge area extending in a direction perpendicular to the housing longitudinal axis, the first radial edge area extending in a direction not perpendicular to the housing longitudinal axis, the housing circumferential wall having a cylindrical configuration at least in an area enclosing the heat exchanger housing and the outlet front wall area having a conically tapering configuration in at least some areas, wherein a distance of the radial edge of the at least one of the heat transfer ribs from the outlet front wall area changes from radially outwards to radially inwards in at least some areas such that the distance increases in the first radial edge area at least in the section extending along the conically tapering area of the outlet front wall area.

9. The vehicle heater in accordance with claim 8 , wherein the distance of the radial edge from the outlet front wall area increases, from radially outwards to radially inwards in at least some areas of each of the heat transfer ribs.

10. The vehicle heater in accordance with claim 8 , wherein the conically tapering area of the outlet front wall area is adjacent to the housing circumferential wall in a radially outward direction and is adjacent to a housing outlet section, providing an outlet opening of the outlet area and essentially cylindrical, in the radially inward direction.

11. The vehicle heater in accordance with claim 8 , wherein the radial edge extends essentially linearly in the area with varying distance to the outlet front wall area.

12. The vehicle heater in accordance with claim 8 , wherein the radial edge has an angle in the range of 5° to 15°, in relation to the outlet front wall area, in the area with varying distance to the outlet front wall area.

13. The vehicle heater in accordance with claim 8 , wherein the heat transfer ribs extend essentially linearly in the direction of the housing longitudinal axis.

14. The vehicle heater in accordance with claim 8 , wherein the heat exchanger housing comprises a circumferential wall area extending essentially in a direction of the housing longitudinal axis and a bottom wall area, disposed adjacent to the circumferential wall area and comprising a dome shape.

15. The vehicle heater in accordance with claim 8 , wherein the s

Assignees

• Eberspaecher Climate Control Sys Gmbh & Co Kg
• Eberspaecher Climate Control Sys Gmbh & Co Kg

Inventors

• Schlör Christof

Classifications

• B60H1/22 Primary

  the heat source being other than the propulsion plant {(B60H1/00492 takes precedence)} · CPC title

• B60H1/2203

  the heat being derived from burners · CPC title

• F24H3/065

  using fluid fuel · CPC title

• F23M5/085

  using air or other gas as the cooling medium · CPC title

• F24H1/009

  for vehicle systems · CPC title