Bleaching and dyeing; fluid treatment and chemical modification – Fluid treatment – Manipulation of liquid
Patent
1991-12-03
1993-05-11
Coe, Philip R.
Bleaching and dyeing; fluid treatment and chemical modification
Fluid treatment
Manipulation of liquid
68 1218, 68 17R, 222 1, 222 14, 222651, D06F 3902
Patent
active
052089304
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and a device for supplying doses of various treatment products to at least one compartment of a treatment machine, particularly a compartment of a machine for washing linen with doses of various liquid products for treatment of the latter.
During the treatment of the linen in a washing machine with a single compartment or in a washing machine of the tunnel type having several compartments, which generally includes, in particular, a first period of pre-washing, a second period of washing, a third period of rinsing, there are introduced into the compartment or compartments of the machine, at predetermined moments during its operating process, doses of various treatment products.
In order to manage the operating process, industrial washing machines are fitted with control components which generally comprise a driven tape provided with perforations associated with means for detection of these perforations. Each line of perforations is associated with a particular component of the washing machine to be controlled, for example the motor for driving of the drum, the valves for supplying with water or for draining. When it is desired to change the linen treatment cycle, a tape is used which is provided with perforations having a different configuration.
At present, in order to supply the washing machine with various treatment products, the abovementioned tape is provided with several further lines of perforations which are respectively associated with the treatment products and which serve to control the introduction of the various treatment products at predetermined moments of the treatment process. Moreover, the length of each of the perforations determines the duration of operation of the means which permit the introduction of each of the treatment products into the washing machine.
Such arrangements are however particularly restrictive and lack flexibility. In fact, for each treatment process, the number of punched tapes has to be multiplied so that one particular program for supplying with treatment products is associated with each tape.
A particular object of the present invention is to remedy these disadvantages.
The method according to one subject of the invention permits the supplying of doses of various treatment products to at least one compartment of a treatment machine, particularly a compartment of a machine for washing linen with doses of various liquid products for treatment of the linen, each product being supplied with the help of a separate transfer means and the machine being subject to an operating process.
The method according to the invention consists in generating, at predetermined moments during the operating process of the machine, a control signal which is identical each time; in associating with the sequence of identical control signals a program for selective control of said transfer means and of volumetric quantities of the corresponding products; and in controlling selectively, in accordance with said program, the transfer means as and when the control signals appear during the operating process of the machine, this control consisting, for each product to be supplied, in starting its transfer means at the appearance of the associated signal, in measuring the volume of this product supplied to the compartment and in stopping this transfer means when the volume of this product supplied to the compartment corresponds to the volumetric quantity predetermined in accordance with said program.
According to the invention, it is particularly advantageous to associate with the sequence of the identical control signals a plurality of programs for selective control of the transfer means, to select one of these programs, and to control selectively, in accordance with the program chosen, the transfer means as and when the control signals appear during the treatment process.
The method according to the invention preferably consists in counting the control signals and in memorizing the number of control signals which have appeared since the start of the oper
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