Cooktop ventilation system having a smoke detection and alarm system

Patent metadata

Field	Value
Publication number	US-10634366-B1
Application number	US-201816214186-A
Country	US
Kind code	B1
Filing date	Dec 10, 2018
Priority date	Dec 10, 2018
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

A cooktop ventilation appliance or system for providing ventilation for a domestic cooking appliance, includes a housing configured to communicate with a ventilation device to convey air from an environment around the domestic cooking appliance into the housing, and a smoke detection and alarm system including at least one sensor configured to detect a density of particles in the air conveyed by the ventilation device, and a control unit in communication with the at least one sensor. The control unit is configured to compare the density of particles detected by the at least one sensor to a predetermined threshold particle density at a given air speed of the air being conveyed and activate an alarm if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed.

First claim

What is claimed is:

1. A domestic ventilation appliance for providing ventilation for a domestic cooking appliance, comprising:
a housing configured to communicate with a ventilation device to convey air from an environment around the domestic cooking appliance into the housing; and
a smoke detection and alarm system including:
at least one sensor configured to detect a density of particles in the air conveyed by the ventilation device; and
a control unit in communication with the at least one sensor, wherein the control unit is configured to compare the density of particles detected by the at least one sensor to a predetermined threshold particle density at a given air speed of the air being conveyed and activate an alarm if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed, wherein the control unit is configured to select the predetermined threshold particle density at the given air speed from a plurality of predetermined threshold particle densities at a plurality of air speeds.

2. The domestic ventilation appliance of claim 1 , wherein the at least one sensor includes at least one of an integrated volatile organic compound sensor, a differential IR sensor, a laser smoke sensor, a temperature sensor, or an aerosol mass spectrometer.

3. The domestic ventilation appliance of claim 1 , wherein the control unit is configured to receive the given air speed of the air from at least one of a control panel of the domestic ventilation appliance and the ventilation device.

4. The domestic ventilation appliance of claim 1 , wherein the control unit determines the given air speed of the air based on an air speed setting of the ventilation device of the domestic ventilation appliance.

5. The domestic ventilation appliance of claim 1 , wherein the control unit determines the given air speed of the air based on an air speed setting selected by a user on a control panel of the domestic ventilation appliance.

6. The domestic ventilation appliance of claim 1 , wherein the control unit is further configured to select the predetermined threshold particle density at the given air speed from a plurality of predetermined threshold particle densities at a plurality of air speeds based on a type of the domestic cooking appliance.

7. The domestic ventilation appliance of claim 6 , wherein the type of the domestic cooking appliance is one of a gas cooking appliance and an electric cooking appliance.

8. The domestic ventilation appliance of claim 6 , wherein the control unit is configured to determine the type of the domestic cooking appliance based on the density of particles detected by the at least one sensor and at least one other factor.

9. The domestic ventilation appliance of claim 8 , wherein the at least one other factor includes a temperature of the air.

10. The domestic ventilation appliance of claim 1 , wherein the ventilation device is integral with the housing.

11. The domestic ventilation appliance of claim 1 , wherein the smoke detection and alarm system includes an override input device configured for user intervention to de-activate the alarm.

12. The domestic ventilation appliance of claim 1 , wherein the control unit is configured to communicate with the domestic cooking appliance and to automatically de-activate a heat supply to one or more components of the domestic cooking appliance if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed.

13. The domestic ventilation appliance of claim 1 , wherein the control unit is configured to communicate with at least one of a control panel of the domestic cooking appliance and the ventilation device, and to one of:
automatically de-activate the ventilation device if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed, and
automatically reduce an air speed setting of the ventilation device if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed.

14. A method of smoke detection and alarm signaling for the domestic ventilation appliance having the smoke detection and alarm system of claim 1 , the method comprising:
comparing, by the control unit, the density of particles detected by the at least one sensor to the predetermined threshold particle density at the given air speed of the air being conveyed;
activating, by the control unit, the alarm when the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed, and
selecting, by the control unit, the predetermined threshold particle density at the given air speed from the plurality of predetermined threshold particle densities at the plurality of air speeds.

15. The method of claim 14 , wherein the at least one sensor includes at least one of an integrated volatile organic compound sensor, a differential IR sensor, a laser smoke sensor, a temperature sensor, or an aerosol mass spectrometer.

16. The method of claim 14 , further comprising:
selecting, by the control unit, the predetermined threshold particle density at the given air speed from a plurality of predetermined threshold particle densities at a plurality of air speeds based on a type of the domestic cooking appliance.

17. The method of claim 16 , further comprising:
determining, by the control unit, the type of the domestic cooking appliance based on the density of particles detected by the at least one sensor and at least one other factor.

18. The method of claim 17 , wherein the at least one other factor includes a temperature of the air.

19. The method of claim 16 , further comprising:
de-activating, by the control unit, a heat supply to one or more components of the domestic cooking appliance if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed.

20. The method of claim 16 , further comprising one of:
de-activating, by the control unit, the ventilation device when the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed, and
reducing, by the control unit, an air speed setting of the ventilation device when the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed.

21. A smoke detection and alarm system for a domestic ventilation appliance for providing ventilation for a domestic cooking appliance, the smoke detection and alarm system comprising:
at least one sensor configured to detect a density of particles in the air conveyed by the ventilation device; and
a control unit in communication with the at least one sensor, wherein the control unit is configured to compare the density of particles detected by the at least one sensor to a predetermined threshold particle density at a given air speed of the air being conveyed and activate an alarm if the density of particles detected by the at least one sensor exceeds the predetermined threshold particle density for the given air speed, wherein the control unit is configured to select the predetermined threshold particle density at the given air speed from a plurality of predetermined threshold particle densities at a plurality of air speed

Assignees

• Bsh Home Appliances Corp
• Bsh Hausgeraete Gmbh

Inventors

• Bentley Garrett
• Alastair Hunter Tyrel
• Maloney Sean
• Miller Jack
• Steele Samuel
• Trieu Vincent

Classifications

• F24C15/2021 Primary

  Arrangement or mounting of control or safety systems · CPC title

• A62C3/006

  for kitchens or stoves · CPC title

• G08B25/10

  using wireless transmission systems {(G08B25/009 takes precedence)} · CPC title

• G08B17/10

  Actuation by presence of smoke or gases {, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means} · CPC title

• Y02B30/70

  Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating · CPC title