Fluid dispensing device actuated by pressure variations in a main circuit

Abstract

The dispensing device is comprised of a hollow body, divided into a pressurisation chamber and a dispensing chamber using conversion media of the pressure variations into volume variations of the dispensing chamber designed as an elastomer, which has a cavity constituting the actual dispensing chamber, whilst the pressurisation chamber is connected to an inlet tap which has a restriction and ends with an inlet valve and the dispensing chamber to an intermediate section of a secondary circuit which ends at each end in check valves which extend the secondary circuit with a downstream section and an upstream section, the latter being connected to a tank with the product to be dispensed. The closing of the inlet valve leads to a reduction in the volume of the dispensing chamber due to the compression of the elastomer, ejecting the fluid to be dispensed.

Description

TECHNICAL FIELD OF THE INVENTION[0001]This invention refers to an intermittent fluid dispenser which is controlled and operated by the pressure variations in a main circuit of another fluid. The devices operates automatically and autonomously, without having to have any type of external power supply or specific control system.[0002]Its field of application is for dispensing and dosing pumps, being suitable in particular for automatically supplying hygiene products such as detergents and deodorants in sanitary equipment, adding chlorine to swimming pools, washing machine detergents, anti-fouling agents in dishwashers, lubricants in hydraulic circuits and in all cases in which there is a fluid, liquid or gas subjected to pressure variations in a main circuit, and there is a need to add any other fluid, automatically, in a secondary circuit.BACKGROUND TO THE INVENTION[0003]Numerous dispensing devices of this kind are known. As such, document ES 2159392T3 describes a dosing device for a...

AI Technical Summary

Benefits of technology

The invention involves a device that is always pressurized, even when there is no flow, by introducing a restriction in the inlet tap before the inlet valve. This allows for optimal operation of the device while ensuring that it is not excessively pressurized. The elastomer version of the device is easy to use, cheap, and long-lasting. The technical effect of this invention is to improve the operation of the device and make it more efficient in its use.

Problems solved by technology

This dispensing pump is connected after the circuit gate valve and pours into the toilet bowl which varies the pressure between the zero value and the full static pressure of the main water circuit which results in an excessive and sudden change in pressure.

This, in conjunction with the mechanical design of the pump, a spring-loaded floating piston, gives rise to noisy operation and the occurrence of constant breakdowns.

In this case, the pump driving chambers both have an inlet and an outlet which further complicates mechanical and tightness problems in the floating pistons of which the main part of the system is comprised.

As in the previous case, the device is located behind the inlet and discharge valve which gives rise to various problems:The pressure jump between the static pressure in the main circuit and zero is too high and, above all, sudden.The dispensing of the product occurs when the discharge valve opens, which means that the effect of the disinfectant is very short and transitory, being swept by the subsequent flushing of cleaning water from the main circuit.

This worsens in the case of toilets without cistern.

This device operates continuously whilst there is flow in the main circuit, which means the consumption of the fluid to be dispensed is very high, with regulation difficulties.

Images