FI74748B - AUTOMATIC DOSERING. - Google Patents

Description

74748

Automatic dosing device

The present invention relates to an automatic dispensing device for a laundry or dishwasher adapted for a granular or liquid detergent.

Detergents are very hygroscopic and have a wet tendency to clump. Large clumps of detergent can cause a stoppage in the machine's dosing system. The best way to avoid lumps is to keep the detergent dry, and if this can be done, it is possible to dispense it with an automatic device that contains a small detergent supply so that the program can be repeated several times without manually filling the detergent each time. In the dosing unit, the storage must be kept well separated from the wet cabinet of the machine. The present invention provides a solution for completely filling and emptying the feed member and at the same time being used as a barrier against moisture tending to penetrate the warehouse. Such a feature can be achieved according to the invention when the dispensing device is designed as described in the characterizing part of claim 1.

An embodiment of the dispensing device will be described below with reference to the accompanying drawing, in which Fig. 1 shows a vertical cross-section through the dispensing device, and Fig. 2 is a cross-section perpendicular to the cross-section of Fig. 1.

The dispensing device is placed in the wet cabinet of the above-mentioned type of machine, preferably in the door of the machine, which facilitates the filling of the device when the door is opened. A certain amount of laundry or dishwashing powder is placed in a housing 10 with a 2,74748 lid 11 that can be unscrewed and has a seal 12 that seals against moisture. The housing is embedded in the inside of the door and only the lid is visible. The latter is preferably made of a transparent material so that the amount of powder in the stock can be seen. In this way, the lid can be easily opened and the housing can be filled as required. At the bottom of the device is a feed member 14 adapted to transfer a dose of powder from a warehouse to a wet cabinet. It comprises a roll 15 having a star-shaped cross-section and mounted in a housing 16 on a shaft 17 and rotated in a housing by a motor 18. The roll has a plurality of compartments 19 which are regularly filled with powder during storage when one is located at a from the hole 20. The roller is driven by a motor 18 controlled by a machine program control device (not shown). The operation lasts at a low rotational speed for an angle at least equal to the width of the compartment. Once per cycle, each compartment bypasses a discharge station formed by an opening 21 in the bottom of the housing 16, so that the powder carried by such a bypass compartment is discharged through the opening into a wet cabinet. The roller 15 runs against the inside of the housing and thus keeps the storage separate from the wet cabinet. This property of the roll has been improved by making the roll a flexible material. To further ensure sealing, a compartment filled with powder is always held between the filling station and the emptying station. This powder absorbs any moisture that passes through the compartment wall drain station.

In order to prevent water from remaining in the compartment and entering the storage, the compartment closest to the filling station is emptied through a channel 22 passing through the bottom of the housing.

To ensure that the compartment is emptied, at the emptying station, the pipe 23 is placed in the opening 21 and connected to the machine

II

3 circulation system so that water sprays into the compartment and rinses it clean. The housing 10 can be cleaned in the same manner if necessary. This can be easily done by unscrewing the lid 11 so that the housing opens into a wet cabinet while allowing the machine to run for some time.

The electric motor 18 is started by a signal from the program control device, which keeps the motor running until the switch 25 controlled by the camshaft 24 cuts off the power to the motor. The purpose of the cam wheel is to adjust the clutch so that it makes a cut when the compartment hits the opening 21, whereby the most efficient emptying is achieved.

The embodiment now described is an example of how the invention may be implemented. The division of the roll into compartments is arbitrary, for example there can be only one compartment in the roll. The rotation of the roll can be effected in other ways, e.g. by water pressure. The roll can be mounted on a vertical shaft and the compartments can be filled and emptied at either end of the roll.

Claims (2)

74748 An automatic detergent dispenser for a washing machine or dishwasher, provided with a detergent storage (10) and a roller-shaped feed member for transferring a detergent dose from the storage to a wet cabinet of the machine, the roller (15) being provided with a plurality of dispensing compartments (19) and rotatably mounted in the housing (16) , having a filling opening (20) leading to one of said compartments (19) and a discharge opening (21) leading to a wet cabinet, in addition to which the drive member (18) is adapted to rotate the roll at dosing intervals, characterized in that the liquid supply pipe (23) is arranged in the discharge opening (23). 21) and directed towards the dispensing compartment (19) in the discharge opening, that the roller (15) is watertight and that a channel (22) is arranged, which connects the filling flow to the discharge opening (21) of the dispensing compartment (19) waiting from the warehouse (10) . Device according to claim 1, characterized in that the storage consists of a container (10) with a lid (11) of transparent material, which container (10) is placed on a lid adapted to close the wet cabinet of the machine, 11