Household appliance light

Patent metadata

Field	Value
Publication number	US-10151495-B2
Application number	US-201715694779-A
Country	US
Kind code	B2
Filing date	Sep 2, 2017
Priority date	Sep 2, 2016
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A household appliance light, in particular a light for cooking devices like ovens, microwaves or steam cookers, the household appliance light including a LED configured as an illuminant; a light housing configured to be arranged at a wall of the household appliance; a light exit opening arranged in the light housing which is enclosed by a light permeable cover; a spacer element which is arranged between the LED and the light exit opening and which is arranged in front of a light outlet plane of the LED; and a reflection device which conducts light emitted by the LED to the cover, wherein the spacer element is a light conductor that is made from one uniform material, wherein the reflection device is a reflector which defines a reflector cavity, and wherein the light conductor is run into the reflector cavity.

First claim

What is claimed is:

1. A household cooking appliance light, comprising:
a LED configured as an illuminant;
a light housing that is configured to be arranged at a wall of the household cooking appliance;
a light exit opening that is arranged in the light housing and closed by a light permeable cover;
a spacer element that is arranged between the LED and the light exit opening and that is arranged in front of a light outlet plane of the LED; and
a reflection device that conducts light emitted by the LED to the cover,
wherein the spacer element is a light conductor that is made from one uniform material,
wherein the reflection device is a reflector that defines a reflector cavity,
wherein the light conductor is run into the reflector cavity,
wherein an entire light exit surface of the light conductor is inclined with a uniform inclination relative to a center axis of the light conductor adjacent to the light exit surface so that a cone axis of a light cone exiting from the light exit surface is also inclined relative to the center axis of the light conductor adjacent to the light exit surface,
wherein a scatter radiation exits from a light conductor and the reflector directs the scatter radiation essentially in a direction towards the cover.

2. The household appliance light according to claim 1 ,
wherein the reflector includes a first track shaped reflection surface and a second track shaped reflection surface that originate from an apex axis, and
wherein the apex axis is arranged proximal to a light entry surface of the light conductor.

3. The household appliance light according to claim 2 , wherein the first track shaped reflection surface is cambered about a camber axis that is parallel to the apex axis.

4. The household appliance light according to claim 3 , wherein the first track shaped reflection surface is run into a portion of the light conductor that is proximal to the light entry surface.

5. The household appliance light according to claim 2 , wherein the light conductor is laterally offset from the apex axis of the first track shaped reflection surface and the second track shaped reflection surface.

6. The household appliance light according to claim 5 ,
wherein a light exit surface of the light conductor is inclined relative to a center axis of the light conductor so that a cone axis of a light cone exiting from the light exit surface is also inclined relative to the center axis of the light conductor, and
wherein the light exit surface of the light conductor is sloped downward in a direction towards the lateral offset.

7. The household appliance light according to claim 6 , wherein
wherein the first track shaped reflection surface is cambered about a camber axis that is parallel to the apex axis,
wherein the second track shaped reflection surface is not cambered and runs to a transition portion of the light exit conductor surface and a light conductor enveloping surface,
wherein the transition portion proximal to the light entry surface, and
wherein an inclination of the second track shaped reflection surface with respect to the cone axis of the light cone exiting from the light exit surface renders the second reflection surface substantially ineffective.

8. The household appliance light according to claim 1 , wherein the reflector and a penetration depth of the light conductor into the reflector cavity are adapted to each other so that the reflector reflects only a scatter radiation exiting from the light conductor, but not a direct radiation exiting from the light exit surface.

9. The household appliance light according to claim 1 , wherein the center axis of the light conductor is straight and not cambered along an entire length of the light conductor.

10. A household cooking appliance light, comprising:
a LED configured as an illuminant;
light housing that is configured to be arranged at a wall of the household cooking appliance;
a light exit opening that is arranged in the light housing and closed by a light permeable cover;
a spacer element that is arranged between the LED and the light exit opening and that is arranged in front of a light outlet plane of the LED; and
a reflection device that conducts light emitted by the LED to the cover,
wherein the spacer element is a light conductor that is made from one uniform material,
wherein the reflection device is a reflector that defines a reflector cavity,
wherein the light conductor is run into the reflector cavity,
wherein a light exit surface of the light conductor is inclined relative to a center axis of the light conductor so that a cone axis of a light cone exiting from the light exit surface is also inclined relative to the center axis of the light conductor,
wherein a scatter radiation exits from a light conductor and the reflector directs the scatter radiation essentially in a direction towards the cover, and
wherein the reflector directs the scatter radiation substantially in a direction towards a cone axis of a light cone exiting from the light exit surface of the light conductor.

11. A household cooking appliance light, comprising:
a LED configured as an illuminant;
a light housing that is configured to be arranged at a wall of the household cooking appliance;
a light exit opening that is arranged in the light housing and closed by a light permeable cover;
a spacer element that is arranged between the LED and the light exit opening and that is arranged in front of a light outlet plane of the LED; and
a reflection device that conducts light emitted by the LED to the cover,
wherein the spacer element is a light conductor that is made from one uniform material,
wherein the reflection device is a reflector that defines a reflector cavity, and wherein the light conductor is run into the reflector cavity,
wherein the reflector includes a first track shaped reflection surface and a second track shaped reflection surface that originate from an apex axis,
wherein the apex axis is arranged proximal to a light entry surface of the light conductor,
wherein the first track shaped reflection surface is cambered about a camber axis that is parallel to the apex axis,
wherein the first track shaped reflection surface is run into a portion of the light conductor that is proximal to the light entry surface,
wherein the portion of the light conductor that proximal to the light entry surface is arranged below a plane where boundary beams of a beam cone defined by the radiation angle of the LED intersect boundary surfaces of the light conductor enveloping surface.

Assignees

• Bjb Gmbh & Co Kg

Inventors

• Baumeister Olaf
• Herbst Thomas

Classifications

• H05B6/6444

  Aspects relating to lighting devices in the microwave cavity · CPC title

• F24C15/008 Primary

  Illumination for oven cavities · CPC title

• F21W2131/307

  for ovens · CPC title

• F21V13/02

  Combinations of only two kinds of elements · CPC title

• F21V33/0044

  Household appliances, e.g. washing machines or vacuum cleaners · CPC title