Heating apparatus for a household appliance for the care of laundry items and method for operating such a heating apparatus

• US 20090188660A1
• Filed: 01/15/2009
• Published: 07/30/2009
• Est. Priority Date: 01/25/2008
• Status: Abandoned Application

• Current Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Steffens, Guenter
• Application Number:
  US12/321,038
• Publication Number:
  US 20090188660A1
• Time in Patent Office: Days
• US Class Current: 165/253
• CPC Class Codes: D06F 2103/32 Temperature
• CPC Class Codes: D06F 2105/00 Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
• CPC Class Codes: D06F 58/263 Gas heating equipment
• CPC Class Codes: D06F 58/34 characterised by the purpose or target of the control

Abstract

A household appliance for the care of laundry items, which heating apparatus is embodied for generating heat by combusting gaseous media and has a device for supplying the gaseous medium to a burner, wherein a means is provided which is thermally coupled to the burner and the device and is embodied for changing a temperature of the device in order to control the flow of the medium through the device, in particular the metering unit of the device. The invention also relates to a method for operating a heating apparatus for a household appliance for the care of laundry items, in particular a gas laundry dryer.

Claims

1. A heating apparatus for a household appliance for the care of laundry items for generating heat by combusting gaseous media, the apparatus comprising:

a device for supplying the gaseous medium to a burner; and

a means, thermally coupled to the burner and the device, for changing a flow of the medium through the device by changing a temperature of the device.

2. The heating apparatus of claim 1, wherein the means controls a flow through a metering unit of the device.

3. The heating apparatus of claim 1, wherein the means reduces the flow of the gaseous medium through the device if the temperature of the device is increased by the means.

4. The heating apparatus of claim 1, wherein the means senses the temperature in a region of a flame of the burner.

5. The heating apparatus of claim 1, wherein the means changes the temperature of the gaseous medium.

6. The heating apparatus of claim 1, further comprising a metering unit for metering the gaseous medium.

7. The heating apparatus of claim 6, wherein the metering unit comprises a nozzle or a valve.

8. The heating apparatus of claim 6, wherein the means varies a flow cross-section of the metering unit by applying heat to the metering unit.

9. The heating apparatus of claim 1, wherein the means comprises a heating unit which is thermally coupled to the device and can be controlled electrically as a function of a temperature in a region of the burner

10. The heating apparatus of claim 1, wherein the temperature in the region of the burner is a temperature in a region of the burner flame.

11. The heating apparatus of claim 1, wherein the means comprises a heat exchanger.

12. The heating apparatus of claim 1, wherein the means comprises a heating and cooling element is controlled as a function of a temperature in a region of the burner for the purpose of heating or cooling the device, in particular the metering unit, and is thermally coupled to the device.

13. The heating apparatus of claim 12, wherein the heating and cooling element comprises a Peltier element.

14. The heating apparatus of claim 12, wherein the heating and cooling element is controlled as a function of a temperature in a region of the burner for the purpose of heating or cooling a metering unit.

15. The heating apparatus of claim 1, wherein the means comprises a heating element, thermally coupled to the device, the heating element being controlled as a function of a temperature in a region of the burner for heating the device.

16. The heating apparatus of claim 15, wherein the heating element comprises a Peltier element.

17. The heating apparatus of claim 15, wherein the heating element is controlled as a function of a temperature in the region of the burner for heating a supply line for supplying the gaseous medium to the burner.

18. The heating apparatus of claim 1, wherein the means comprises a pipe which is thermally coupled to the device and the burner and in which a medium is disposed which applies heat to the gaseous medium transported in the device by way of the wall of the pipe as a function of a separate application of temperature by the burner.

19. The heating apparatus of claim 18, wherein the pipe applies heat to the gaseous medium as a function of a temperature by a burner flame.

20. The heating apparatus of claim 18, wherein the pipe is around a supply line and extends in a region of a burner flame.

21. The heating apparatus of claim 20, wherein the pipe is wrapped around the supply line.

22. The heating apparatus of claim 20, wherein the pipe is on an inside surface of a duct around a burner head.

23. A household appliance for the care of laundry items, comprising:

a device for supplying a gaseous medium to a burner; and

a means, thermally coupled to the burner and the device, for changing a flow of the medium through the device by changing a temperature of the device.

24. A method for operating a heating apparatus for a household appliance for the care of laundry items, the method comprising:

supplying a gaseous medium to a burner of the heating apparatus by way of a device; and

varying a flow of the gaseous medium through the device by changing a temperature of the device by a means that is thermally coupled to the burner and the device.

25. The method of claim 24, wherein the device comprises a metering unit.