Power supply arrangement for a suction device and suction device

Patent metadata

Field	Value
Publication number	US-9723963-B2
Application number	US-201514708651-A
Country	US
Kind code	B2
Filing date	May 11, 2015
Priority date	Nov 13, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A power supply arrangement for a suction device is provided, which is optionally operable using direct current or alternating current, including a first connection connectible to a direct current source, a second connection connectible to an alternating current source, a third connection connectible to a consuming unit of the suction device, an electrically isolated converter connected on the input side to the first connection, and a switchover device connected to an output of the converter, the second connection and to the consuming unit, wherein the switchover device allows selection of whether the consuming unit is actively connected to the converter or the second connection for power supply, and wherein the switchover device has one or more components each with an electrical safety clearance that is at least 4 mm in respect of the creepage distance and the total of the creepage distances of the components is at least 8 mm.

First claim

The invention claimed is:

1. A power supply arrangement for a suction device which is selectively operable using direct current or alternating current, in particular mains current, including:
a first connection to which a direct current source is connectible or connected;
a second connection to which an alternating current source is connectible or connected;
at least one third connection to which one or more consuming units of the suction device are connectible or connected;
an electrically isolated converter which is connected on the input side in electrically active manner to the first connection; and
a switchover device which is connected in electrically active manner to an output of the converter, is connected to the second connection and is connected to the at least one consuming unit;
wherein by means of the switchover device it is selectable whether the at least one consuming unit is actively connected to the converter or the second connection for power supply; and
wherein the switchover device has one or more components each with an electrical safety clearance, and the safety clearance of such a component is at least 4 mm in respect of the creepage distance and the total of the creepage distances of the components is at least 8 mm.

2. The power supply arrangement according to claim 1 , wherein the safety clearance in respect of the air gap of a component is at least 2 mm and the total of the air gaps of the components is at least 4 mm.

3. The power supply arrangement according to claim 1 , wherein, where there is a plurality of components, at least two components are connected in series in relation to the second connection.

4. The power supply arrangement according to claim 1 , wherein the switchover device has at least one component by means of which it is selectable whether the third connection is in connection in a manner effective for power supply either with the second connection or with the output of the converter.

5. The power supply arrangement according to claim 1 , wherein the switchover device includes at least one of (i) at least one relay, (ii) a contactor and (iii) a switch.

6. The power supply arrangement according to claim 1 , wherein the switchover device has at least one component as the electrical base insulation and at least one further component as an additional electrical insulation.

7. The power supply arrangement according to claim 6 , wherein the at least one further component has a switch-through function with no switchover function.

8. The power supply arrangement according to claim 1 , wherein contacts of the switchover device are arranged on a support, in particular a circuit board, and a creepage distance is formed between the contacts by one or more recesses between the contacts and in particular by one or more recesses passing right through the support.

9. The power supply arrangement according to claim 8 , wherein a dimension of the at least one recess that is determinative for a creepage distance in respect of a spacing between spaced contacts is at least 4 mm.

10. The power supply arrangement according to claim 1 , wherein the electrically isolated converter isolates an alternating current voltage side having the alternating current source from the direct current source.

11. The power supply arrangement according to claim 1 , wherein the switchover device isolates a direct current voltage side having the direct current source from the alternating current source by means of the safety clearance.

12. The power supply arrangement according to claim 1 , wherein the converter provides a direct current voltage or alternating current voltage of 100 V or more, and in particular provides a direct current voltage or alternating current voltage of 140 V or more for a cleaning procedure on the suction device.

13. The power supply arrangement according to claim 1 , wherein the direct current source is a rechargeable battery unit.

14. A suction device, in particular a vacuum cleaner, including:
a suction inlet;
a dirt collection container;
a filter device;
a suction removal line; and
a suction assembly;
wherein the dirt collection device is in flow connection with the suction assembly by way of the filter device and the suction removal line, and negative pressure from the suction assembly acts on the filter device;
and a power supply arrangement; said power supply arrangement including:
a first connection to which a direct current source is connectible or connected;
a second connection to which an alternating current source is connectible or connected;
at least one third connection to which one or more consuming units of the suction device are connectible or connected;
an electrically isolated converter which is connected on the input side in electrically active manner to the first connection; and
a switchover device which is connected in electrically active manner to an output of the converter, is connected to the second connection and is connected to the at least one consuming unit;
wherein by means of the switchover device it is selectable whether the at least one consuming unit is actively connected to the converter or the second connection for power supply; and
wherein the switchover device has one or more components each with an electrical safety clearance, and the safety clearance of such a component is at least 4 mm in respect of the creepage distance and the total of the creepage distances of the components is at least 8 mm.

15. The suction device according to claim 14 , including a cleaning device for the filter device.

16. The suction device according to claim 14 , wherein a consuming unit of the suction device is at least one of an electric motor device of the suction assembly and a cleaning device for the filter device.

17. The suction device according to claim 14 , wherein one or more power consuming units of the suction device are operable alternatively by direct current or alternating current.

Assignees

• Kaercher Gmbh & Co Kg Alfred

Inventors

• Foell Martin
• Cancar Josip

Classifications

• A47L9/2884

  Details of arrangements of batteries or their installation · CPC title

• A47L9/2868 Primary

  Arrangements for power supply of vacuum cleaners or the accessories thereof · CPC title

• H02M7/44

  by static converters · CPC title

• A47L9/12

  Dry filters · CPC title

• A47L9/20

  Means for cleaning filters · CPC title