Household appliance comprising a door opening aid

Patent metadata

Field	Value
Publication number	US-9726421-B2
Application number	US-201515122212-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 28, 2014
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A household appliance includes an interior compartment, a door for closing the interior compartment and a drive facility for assisting with opening the door. The household appliance further includes a pressure sensing facility for detecting or sensing a difference between an interior pressure inside the interior compartment and an ambient pressure outside the interior compartment. The drive facility is configured to apply a driving force to the door as a function of the difference between the pressures.

First claim

The invention claimed is:

1. A household appliance, comprising:
an inner container;
a door for closing said inner container;
a pressure sensing facility for detecting a pressure difference between an interior pressure inside said inner container and an ambient pressure outside said inner container; and
a drive facility for assisting opening of said door, said drive facility being configured to apply a drive force to said door as a function of the pressure difference, and said drive facility being configured to:
determine an extent of the drive force as a function of the pressure difference,
apply the drive force to the door if the pressure difference reaches a predetermined threshold value within a predetermined time period, and
apply the drive force to the door if the pressure difference reaches a first predetermined threshold value within a first predetermined time period and then a second predetermined threshold value within a second predetermined time period.

2. The household appliance according to claim 1 , wherein said pressure sensing facility includes a differential pressure sensor for detecting the pressure difference between the interior pressure and the ambient pressure.

3. The household appliance according to claim 1 , wherein said pressure sensing facility includes a first pressure sensor for detecting the interior pressure and a second pressure sensor for detecting the ambient pressure.

4. The household appliance according to claim 1 , wherein said pressure sensing facility is also configured to determine the pressure difference between a detected interior pressure and a detected ambient pressure.

5. The household appliance according to claim 1 , which further comprises an interior pressure line connected between said pressure sensing facility and said inner container for detecting the interior pressure.

6. The household appliance according to claim 5 , wherein said interior pressure line includes a membrane or a membrane covering.

7. The household appliance according to claim 1 , which further comprises an ambient pressure line connected between said pressure sensing facility and surroundings of said inner container for detecting the ambient pressure.

8. The household appliance according to claim 7 , wherein said ambient pressure line includes a membrane or a membrane covering.

9. The household appliance according to claim 1 , which further comprises a drainage line connecting said inner container to surroundings of said inner container.

10. The household appliance according to claim 1 , which further comprises a cross member of the household appliance, said drive facility being disposed on said cross member.

11. The household appliance according to claim 1 , wherein said drive facility includes a drive unit for applying the drive force to said door.

12. The household appliance according to claim 11 , wherein said drive facility includes an electric motor for driving said drive unit.

13. The household appliance according to claim 11 , wherein said drive facility includes a linear motor for driving said drive unit.

14. The household appliance according to claim 11 , wherein said drive facility includes an elastic spring element for driving said drive unit.

Assignees

• Bsh Hausgeraete Gmbh
• Bsh Hausgeraete Gmbh

Inventors

• Kempfle Stephan

Classifications

• F25D29/005

  Mounting of control devices · CPC title

• F25D23/028 Primary

  Details · CPC title

• F25D2700/02

  Sensors detecting door opening · CPC title

• F25D17/047

  Pressure equalising devices · CPC title

• D06F34/20

  Parameters relating to constructional components, e.g. door sensors · CPC title