TEMPERATURE DETECTION DEVICE FOR A VEHICLE HEATER

• US 20160069749A1
• Filed: 09/09/2015
• Published: 03/10/2016
• Est. Priority Date: 09/10/2014
• Status: Active Grant

• Current Assignee: Eberspacher Climate Control Systems GmbH & Co. KG (Eberspächer Gruppe GmbH & Co. KG)
• Original Assignee: Eberspacher Climate Control Systems GmbH & Co. KG (Eberspächer Gruppe GmbH & Co. KG)
• Inventors: HUMBURG, Michael, KENNERKNECHT, Klaus
• Granted Patent: US 10,024,722 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01J 5/0205 Mechanical elements; Supports for optical elements
• CPC Class Codes: G01J 5/0815 Light concentrators, collectors or condensers
• CPC Class Codes: G01J 5/0868 Means for illuminating a slit or a surface efficiently, e.g. entrance slit of a pyrometer or entrance face of a fiber
• CPC Class Codes: G01J 5/0887 Integrating cavities mimicking black bodies, wherein the heat propagation between the black body and the measuring element does not occur within a solid; Use of bodies placed inside the fluid stream for measurement of the temperature of gases; Use of the reemission from a surface, e.g. reflective surface; Emissivity enhancement by multiple reflections
• CPC Class Codes: G01J 5/10 using electric radiation detectors

Abstract

A temperature detection device (10) for a vehicle heater detects a fluid temperature. The device includes a temperature sensor (12) as well as a contact element (14) with a first side (16), around which the fluid can flow in at least some sections, and with a second side (18) facing away from the first side (16). The temperature sensor (12) is configured as a radiation sensor. The contact element (14) is arranged relative to the temperature sensor (12) such that at least a part of the radiation emitted from the second side (18) of the contact element (14) can be received by the temperature sensor (12).

Claims

1. A temperature detection device for a vehicle heater for detecting a fluid temperature, the temperature detection device comprising:

a temperature sensor; and

a contact element with a first side, around which the fluid can flow in at least some sections, and with a second side facing away from the first side, wherein the temperature sensor is configured as a radiation sensor and wherein the contact element is arranged relative to the temperature sensor such that at least a part of the radiation emitted from the second side of the contact element can be received by the temperature sensor.

2. A temperature detection device in accordance with claim 1, wherein the second side of the contact element comprises an emission area emitting radiation in the direction of the temperature sensor.

3. A temperature detection device in accordance with claim 2, wherein the emission area has a higher surface roughness in at least some areas compared to other areas of the second side of the contact element, which said other areas are different from the emission area.

4. A temperature detection device in accordance with claim 2, further comprising a shielding having a window associated with the temperature sensor, wherein the window is arranged relative to the temperature sensor and relative to the contact element such that the window lets through essentially only radiation emitted from the emission area to the temperature sensor.

5. A temperature detection device in accordance with claim 1, wherein the fluid can flow around the second side of the contact element.

6. A temperature detection device in accordance with claim 1, wherein the temperature sensor is an infrared sensor.

7. A temperature detection device in accordance with claim 1, wherein the contact element is made of a black plastic.

8. A temperature detection device in accordance with claim 1, wherein the contact element has a contact surface formation comprising a projection on the first side.

9. A temperature detection device in accordance with claim 1, wherein:

the temperature sensor is provided on a housing of a control device; and

the contact element is provided by a part of the housing.

10. A temperature detection device in accordance with claim 9, wherein the contact element is connected to the housing by webs.

11. A temperature detection device in accordance with claim 9, wherein the housing has a window element arranged between the temperature sensor and the contact element and the window element is transparent for radiation to be detected.

12. A vehicle heater comprising:

a temperature detection device comprising;

a temperature sensor; and

a contact element with a first side, around which the fluid can flow in at least some sections, and with a second side facing away from the first side, wherein the temperature sensor is configured as a radiation sensor and wherein the contact element is arranged relative to the temperature sensor such that at least a part of the radiation emitted from the second side of the contact element can be received by the temperature sensor.

13. A vehicle heater in accordance with claim 12, further comprising a control device accommodated in a housing, wherein the temperature sensor is provided on the housing and wherein the contact element is provided on the housing or forms a portion of the housing.

14. A vehicle heater in accordance with claim 13, wherein the second side of the contact element comprises an emission area emitting radiation in the direction of the temperature sensor.

15. A vehicle heater in accordance with claim 14, wherein the emission area has a region of higher surface roughness compared to an adjacent area of the second side of the contact element.

16. A vehicle heater in accordance with claim 14, further comprising a shielding having a window associated with the temperature sensor, wherein the window is aligned with the emission area allowing essentially only radiation emitted from the emission area to the temperature sensor.

17. A vehicle heater in accordance with claim 14, wherein the fluid can flow around the second side of the contact element.

18. A vehicle heater in accordance with claim 14, wherein:

the temperature sensor is an infrared sensor;

the contact element is made of a black plastic; and

the contact element has a contact surface formation comprising a projection on the first side.

19. A vehicle heater in accordance with claim 14, wherein:

the temperature sensor is provided on a housing of the control device; and

the contact element is provided by a part of the housing.

20. A vehicle heater in accordance with claim 19, wherein the housing has a window element arranged between the temperature sensor and the contact element and the window element is transparent for radiation to be detected.