Vehicle heater

Patent metadata

Field	Value
Publication number	US-11084354-B2
Application number	US-201815954958-A
Country	US
Kind code	B2
Filing date	Apr 17, 2018
Priority date	Apr 18, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A vehicle heater includes a heater housing (12), through which heating air to be heated can flow, with a heating air inlet area and with a heating air outlet area. A burner unit is arranged in the heater housing. A combustion air blower is arranged in the heater housing for feeding combustion air to the burner unit. A heat exchanger unit is arranged in the heater housing (12). Heating air flowing through the heater housing (12) can flow around the heat exchanger unit. A combustion air intake muffler (76), which is essentially arranged in the heater housing (12), is associated with the combustion air blower (46).

First claim

What is claimed is:

1. A vehicle heater comprising:
a heater housing, through which heating air to be heated flows, with a heating air inlet area and with a heating air outlet area;
a burner unit arranged in the heater housing;
a combustion air blower arranged in the heater housing for feeding combustion air to the burner unit;
a heat exchanger unit arranged in the heater housing and around which heating air flowing through the heater housing flows; and
a combustion air intake muffler arranged in the heater housing and associated with the combustion air blower, wherein the combustion air intake muffler comprises a first muffler flow path leading combustion air from a combustion air inlet area of the combustion air blower in one axial direction, which is opposite another axial direction, away from an axial side of the blower body and a second muffler flow path leading combustion air in the another axial direction to the feed duct inlet area, the combustion air intake muffler comprising a muffler housing, which is arranged on the axial side of the blower body and is connected to the blower body, the first muffler flow path and the second muffler flow path being formed in the muffler housing, wherein a muffling body made of a muffling material is arranged in the muffler housing, the first muffler flow path and the second muffler flow path being formed in the muffling body, the first muffler flow path and the second muffler flow path extending parallel to the axis of rotation, the first muffler flow path being arranged radially outside of the second muffler flow path.

2. The vehicle heater in accordance with claim 1 , wherein:
the combustion air blower and the heat exchanger unit are arranged centrally in the heater housing in relation to a housing longitudinal axis;
heating air flowing through the heater housing on outer circumferential areas flows around in a heating air flow space enclosing the combustion air blower and the heat exchanger unit; and
the combustion air intake muffler is arranged in the heating air flow space.

3. The vehicle heater in accordance with claim 1 , wherein the combustion air blower comprises:
a blower motor with a motor shaft, which motor shaft is rotatable about an axis of rotation, which is parallel or concentric to a housing longitudinal axis; and
a combustion air feed wheel coupled to the motor shaft for joint rotation about the axis of rotation, wherein a heating air feed wheel is coupled to the motor shaft for joint rotation about the axis of rotation and is provided in the heating air inlet area.

4. The vehicle heater in accordance with claim 1 , wherein the combustion air blower has a combustion air inlet area, which passes through a housing wall of the heater housing and guides combustion air to the combustion air intake muffler.

5. The vehicle heater in accordance with claim 4 , wherein the combustion air inlet area comprises a combustion air inlet connecting piece with a connecting piece longitudinal axis extending at right angles to the housing longitudinal axis or extending at right angles to the axis of rotation or extending at right angles to the housing longitudinal axis and extending at right angles to the axis of rotation.

6. The vehicle heater in accordance with claim 1 , wherein the combustion air inlet area comprises a combustion air inlet connecting piece, which is made integral with the blower body, with a connecting piece longitudinal axis extending at right angles to the axis of rotation, wherein a first combustion air flow opening, which is adjacent to the combustion air inlet connecting piece, with a first opening axis oriented parallel to the axis of rotation, and a second combustion air flow opening, which is open towards the feed duct inlet area, with a second opening axis, which is oriented parallel to the axis of rotation, are provided in the blower body.

7. A combustion air blower, for a vehicle heater, the combustion air blower comprising:
a blower body with a feed duct, which feed duct extends with a ring pattern about an axis of rotation and is open on a first axial side of the blower body in a first axial direction;
a combustion air feed wheel located opposite the blower body on a first axial side, with a ring pattern feed area overlapping the feed duct and with a plurality of feed blades following one another in a circumferential direction about the axis of rotation;
a blower motor arranged on a second axial side of the blower body, which second axial side is opposite the first axial side of the blower body, and with a motor shaft rotatable about the axis of rotation, the motor shaft being coupled to the combustion air feed wheel for joint rotation about the axis of rotation;
a feed duct inlet area open towards the feed duct and in the blower body for the inlet of combustion air into the feed duct; and
a combustion air intake muffler arranged on the second axial side of the blower body, the combustion air intake muffler comprising a muffler housing, which is arranged on the second axial side of the blower body and is connected to the blower body, wherein a first muffler flow path and a second muffler flow path are formed in the muffler housing, wherein a muffling body made of a muffling material is arranged in the muffler housing, the first muffler flow path and the second muffler flow path being formed in the muffling body.

8. The combustion air blower in accordance with claim 7 , wherein the first muffler flow path leads combustion air from a combustion air inlet area of the combustion air blower in a second axial direction, which is opposite the first axial direction, away from the second axial side of the blower body and the second muffler flow path leads combustion air in the first axial direction to the feed duct inlet area.

9. The combustion air blower in accordance with claim 8 , wherein the combustion air inlet area comprises a combustion air inlet connecting piece, which is made integral with the blower body, with a connecting piece longitudinal axis extending at right angles to the axis of rotation, wherein a first combustion air flow opening, which is adjacent to the combustion air inlet connecting piece, with a first opening axis oriented parallel to the axis of rotation, and a second combustion air flow opening, which is open towards the feed duct inlet area, with a second opening axis, which is oriented parallel to the axis of rotation, are provided in the blower body.

10. The combustion air blower in accordance with claim 9 , wherein the first combustion air flow opening and the second combustion air flow opening are formed in a flow opening attachment, which extends in the second axial direction on the second axial side of the blower body and is made integral with the blower body.

11. The combustion air blower in accordance with claim 9 , wherein the first combustion air flow opening is arranged radially outside of the second combustion air flow opening.

12. The combustion air blower in accordance with claim 7 , wherein the combustion air intake muffler comprises a muffler housing, which is arranged on the second axial side of the blower body and is connected to the blower body.

13. The combustion air blower in accordance with claim 7 , wherein:
the first muffler flow path and the second muffler flow path extend parallel to the axis of rotation; and
the first muffler flow path is arranged radially outside of the second muffler flow path.

14. The combustion air blower in accordance with claim 7 , further comprising a motor housing made integral with the blower body, wherein:
the motor housing is provided on the second axial side of the blower body; an

Assignees

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

Inventors

• Humburg Michael
• Jensen Hans

Classifications

• B60H1/2212 Primary

  arrangements of burners for heating air · CPC title

• B60H2001/2281

  Air supply, exhaust systems · CPC title

• F24H3/065 Primary

  using fluid fuel · CPC title

• F24F13/24

  Means for preventing or suppressing noise · CPC title

• F23D2210/101

  using noise dampening material · CPC title