Valve with outlet flow rate regulation, and container equipped with such a valve

Abstract

A valve (1), particularly for an aerosol container, includes, inside a valve body (2), an inlet passage (4) communicating with the container and an outlet passage (10), a first elastic return (16) for urging the valve (1) into the closed position, and a regulator for regulating the product outlet flow rate, which includes a second elastic return (14) for supplying a set-point pressure for the regulator. The second elastic return (14) is arranged in a compartment (12) of the valve body (2) isolated from the product, the pressure inside the compartment (12) being equal to atmospheric pressure.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to a valve of an aerosol container for example, intended for dispensing a product at an essentially constant flow rate, for example, a cosmetic product. The invention is most particularly suited for dispensing deodorants or hairstyling products, especially lacquers or mousses.2. Description of the Related ArtModernly, the problem of variations in performance between the initial use of a container and the final use is encountered in the field of aerosol dispensers. These problems arise, in particular, in devices in which the product is pressurized by means of a compressed gas, especially carbon dioxide or nitrogen dioxide. In such devices, the gas is either directly in contact with the product or isolated from the product by a piston or a bag containing the product. The variations in flow rate and / or pressure are directly associated with the pressure drops inside the container, which inevitably cause a ...

AI Technical Summary

Benefits of technology

In particular, one object of the invention is to provide a valve with a built-in regulating device which is reliable and economical to produce, and in particular, a valve in which the set-point value does not vary according to the product to be dispensed or according to the variations in pressure inside the container on which it is intended to be mounted.

In another preferred embodiment, when the pressure inside the regulating chamber drops below a predetermined value, the closing means shut off the outlet orifice of the regulating chamber in a leaktight manner so as to interrupt the dispensing of product. Thus, any spraying or diffusing whose characteristics might not be satisfactory, due to an insufficient outlet pressure, is prevented.

Problems solved by technology

Modernly, the problem of variations in performance between the initial use of a container and the final use is encountered in the field of aerosol dispensers.

These problems arise, in particular, in devices in which the product is pressurized by means of a compressed gas, especially carbon dioxide or nitrogen dioxide.

The variations in flow rate and / or pressure are directly associated with the pressure drops inside the container, which inevitably cause a drop in product outlet flow rate.

One of the drawbacks associated with such a regulating system stems from the fact that the calibrated spring is arranged in a part of the valve body in communication with the product.

Thus, for each new formulation, it is necessary to use a different calibrated spring, which makes the system somewhat inflexible.

Furthermore, the means of shutting off the outlet orifice are not secured to the piston, and this results in a less precise flow rate regulation.

The drawbacks of such a system are mainly of two fold.

On one hand, the regulating system takes up a significant amount of space in the push-button, which leaves little latitude for designing the supply to the outlet nozzle or the diffusing system and spray mechanism.

On the other hand, between uses, the means of shutting off the regulating chamber are in communication with the outside of the container, and therefore with the air, which entails a high risk of the shutter "sticking", especially in the case of products with a high resin content.

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