DE102004051065A1 - Metering valve for household machine e.g. for dishwasher metering valve has a displacement device for the restriction of the service fluid e.g. detergent from a storage container - Google Patents

Abstract

The metering valve has a displacement device for the restriction of the service fluid e.g. detergent from a storage container. The system comprises e.g. of a container, which stores the medium. A displacement device is arranged preferably with a resetting element like a nib or such thing in the lower area or under this container. The displacement device can be e.g. a cylinder with piston and/or diaphragm system.

Description

Around in household appliances liquid To dose media today are pumps in various designs in use. These pumps are relatively expensive, expensive and cause depending on the construction strong noises.

The Invention has the task of dosing in a simple and quiet Way to allow.

Function:

The System consists e.g. from a container that holds the medium. In the lower area or under this container is a displacer unit preferably with a return element arranged as a spring or the like. The displacer unit can e.g. a cylinder with piston and / or a membrane system, in which a spring moves the piston or the membrane so that via a check valve From the storage medium medium is sucked into the dosing. Of the Room behind the displacer unit e.g. behind the piston or the membrane has (via a bypass) a connection to the circulation system for the Soapy water. If now the circulation pump is turned on, the Verdangereinheit or the piston (the membrane) is pressurized so that the medium from the dosing is squeezed out. The medium can only escape, however, if the metering valve preferably controlled the way by means of a control unit releases as the check valve preferably closes the connection to the reservoir. The Dosage is advantageously dependent on the duration of Ventilbesätigung and for example if a larger amount in particular, as the dosing chamber contains must be dosed Brief shutdown of the circulation pump this Dosing room refilled become.

Variants:

Of the Room behind the displacer unit (the piston, the diaphragm) can be part of the channel of the pump to the spray arms be.

The Dosing valve can direct the medium directly into the channel to the spray arms.

The Dosage can be made in the bypass.

The Verdängereinheit (the piston-diaphragm system) can be designed as a pressure booster.

The Dosing system can be accommodated in the storage tank.

The Dosing system does not have to be in the immediate vicinity of the storage container but can also be spaced.

When Drive can also be an independent one in particular serve separate pressure generating system. That's special makes sense if several media from different storage containers are dosed have to e.g. at washing machines.

The Dosage can over a cylinder-piston system done.

The Dosage can over a rolling membrane done.

The Dosing can be time-controlled.

The Dosage can over a conductivity measurement can be controlled.

Claims (1)

Dosing valve for a household appliance, in particular for a dishwasher, characterized in that a displacer unit for displacing operating fluid, in particular cleaning agent, is provided from a storage container.