Heat exchanger arrangement, especially for a fuel-operated vehicle heater

Patent metadata

Field	Value
Publication number	US-10300765-B2
Application number	US-201514859746-A
Country	US
Kind code	B2
Filing date	Sep 21, 2015
Priority date	Sep 22, 2014
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A heat exchanger arrangement ( 10 ), especially for a fuel-operated vehicle heater, includes an outer pot-shaped housing ( 12 ) having an outer bottom wall ( 16 ) and an outer circumferential wall ( 18 ) extending along a longitudinal axis (L). An inner pot shaped housing ( 14 ) has an inner bottom wall ( 20 ) and an inner circumferential wall ( 22 ) extending along the longitudinal axis (L). A flow space ( 24 ) for fluid whose temperature is to be regulated is formed between the inner housing ( 16 ) and the outer housing ( 12 ). At least one liquid uptake volume ( 46, 48 ) for taking up liquid condensed in the inner housing ( 14 ).

First claim

What is claimed is:

1. A heat exchanger arrangement for a fuel-operated vehicle heater, the heat exchanger comprising:
an outer housing having an outer bottom wall and an outer circumferential wall extending along a longitudinal axis for providing a pot shaped structure of the outer housing;
an inner housing having an inner bottom wall and an inner circumferential wall extending along the longitudinal axis for providing a pot shaped structure of the inner housing, wherein a flow space is formed, for a fluid for which a temperature is to be regulated, between the inner housing and the outer housing; and
at least one liquid uptake area for taking up liquid condensed in the inner housing the at least one liquid uptake area being formed at the inner housing, the at least one liquid uptake area being in fluid connection with an inner space enclosed by the inner housing via an opening in the inner housing, the opening having a smaller extension in the circumferential direction and in the direction of the longitudinal axis than an extension of the at least one liquid uptake area in the circumferential direction and in the direction of the longitudinal axis, wherein one of at least one liquid guide channel is provided between a waste gas discharge opening, one of the at least one liquid uptake area and a step shoulder, the one of the at least one liquid guide channel is provided for guiding condensed liquid towards the one of the at least one liquid uptake area.

2. The heat exchanger arrangement in accordance with claim 1 , wherein:
the one of the at least one liquid uptake area is provided in a region of the waste gas discharge opening;
the waste gas discharge opening is provided in an end area of the inner housing, which said end area is located at a distance from the inner bottom wall in a direction of the longitudinal axis.

3. The heat exchanger arrangement in accordance with claim 2 , wherein the one of the at least one liquid guide channel leads from the waste gas discharge opening to the one of the at least one liquid uptake area.

4. The heat exchanger arrangement in accordance with claim 1 , further comprising another liquid uptake area to provide at least two liquid uptake areas arranged one after another in the circumferential direction.

5. The heat exchanger arrangement in accordance with claim 1 , further comprising:
at least an additional liquid uptake area to provide a plurality of liquid uptake areas, wherein the waste gas discharge opening is in an end area of the inner housing, which said end area is located at a distance from the inner bottom wall in a direction of the longitudinal axis.

6. The heat exchanger arrangement in accordance with claim 1 , wherein the inner housing comprises an inner housing circumferential surface comprising a first inner housing circumferential surface edge portion and a second inner housing circumferential surface edge portion, the inner housing circumferential surface defining at least a portion of the inner space of the inner housing, the first inner housing circumferential surface edge portion being located at a spaced location from the second inner housing circumferential surface edge portion, the opening being defined by at least the first inner housing circumferential surface edge portion and the second inner housing circumferential surface edge portion, wherein the inner space is in fluid communication with an interior space of the inner housing via the opening.

7. The heat exchanger arrangement in accordance with claim 6 , wherein the interior space is defined by at least an inner housing surface of the inner housing, the inner housing surface being located at a greater radial distance than the inner housing circumferential surface with respect to the longitudinal axis.

8. A vehicle heater, comprising a heat exchanger arrangement, the heat exchanger arrangement comprising:
an outer housing having an outer bottom wall and an outer circumferential wall extending along a longitudinal axis for providing a pot shaped structure of the outer housing;
an inner housing having an inner bottom wall and an inner circumferential wall extending along the longitudinal axis for providing a pot shaped structure of the inner housing, wherein a flow space is formed, for a fluid for which a temperature is to be regulated, between the inner housing and the outer housing; and
at least one liquid uptake area for taking up liquid condensed in the inner housing, the at least one liquid uptake area being formed at the inner housing, the at least one liquid uptake area being in fluid connection with an inner space enclosed by the inner housing via an opening in the inner housing, the opening having a smaller extension in the circumferential direction and in the direction of the longitudinal axis than an extension of the at least one liquid uptake area in the circumferential direction and in the direction of the longitudinal axis, wherein one of at least one liquid guide channel is provided between a waste gas discharge opening, one of the at least one liquid uptake area and a step shoulder, the one of the at least one liquid guide channel is provided for guiding condensed liquid towards the one of the at least one liquid uptake area.

9. The vehicle heater in accordance with claim 8 , wherein:
the one of the at least one liquid uptake area is provided in a region of the waste gas discharge opening;
the waste gas discharge opening is provided in an end area of the inner housing, which said end area is located at a distance from the inner bottom wall in a direction of the longitudinal axis, wherein the one of the at least one liquid guide channel leads from the waste gas discharge opening to the one of the at least one liquid uptake area.

10. The vehicle heater in accordance with claim 8 , further comprising:
at least an additional liquid uptake area to provide a plurality of liquid uptake areas, wherein the waste gas discharge opening is in an end area of the inner housing, which said end area is located at a distance from the inner bottom wall in a direction of the longitudinal axis.

11. The vehicle heater in accordance with claim 8 , wherein the inner housing comprises an inner housing circumferential surface comprising a first inner housing circumferential surface edge portion and a second inner housing circumferential surface edge portion, the inner housing circumferential surface defining at least a portion of the inner space of the inner housing, the first inner housing circumferential surface edge portion being located at a spaced location from the second inner housing circumferential surface edge portion, the opening being defined by at least the first inner housing circumferential surface edge portion and the second inner housing circumferential surface edge portion, wherein the inner space is in fluid communication with an interior space of the inner housing via the opening.

12. The vehicle heater in accordance with claim 11 , wherein the interior space is defined by at least an inner housing surface of the inner housing, the inner housing surface being located at a greater radial distance than the inner housing circumferential surface with respect to the longitudinal axis.

13. A heat exchanger arrangement comprising:
an outer housing having an outer bottom wall and an outer circumferential wall extending along a longitudinal axis;
an inner housing having an inner bottom wall and an inner circumferential wall extending along the longitudinal axis, wherein a flow space is formed, for a fluid for which a temperature is to be regulated, between the inner housing and the outer housing, the inner housing having an inner circumferenti

Assignees

• Eberspaecher Climate Control Sys Gmbh & Co Kg

Inventors

• Haefner Michael
• Alber Andreas
• Bauer Thomas

Classifications

• F23N2241/14

  Vehicle heating, the heat being derived otherwise than from the propulsion plant · CPC title

• F24H1/263

  with a dry-wall combustion chamber · CPC title

• B60H1/22

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

• F24H8/00

  Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation · CPC title

• B60H2001/2271

  Heat exchangers, burners, ignition devices · CPC title