Purge valve for pressure cooker

Abstract

The invention provides a purge valve (1) for a pressure cooker (2). The valve (1) has a valve body (5) forming a seat (6), and an obturating element (7) designed to move from an opening configuration in which the element is separated from the seat and authorizes leak of a gas flow (F) from the chamber to a closing configuration in which the element sealingly contacts the seat and ensures sealing of the chamber under effect of pressure reigning within a cooking chamber. An elastic return unit (8) is distinct from the body and/or the element, and arranged to stress the element toward the opening configuration against the pressure. An independent claim is also included for a pressurized cooking appliance e.g. domestic pressure cooker or autoclave.

Description

technical field [0001] The present invention relates to the general field of relief valves designed for use in pressure cooking appliances, more particularly for cooking appliances of the domestic pressure cooker type. Background technique [0002] The present invention relates in particular to a relief valve for a pressure cooking appliance, said valve being designed to expel from said cooking cavity the gas initially contained in said cooking cavity at the start of cooking, said The relief valve comprises firstly a valve body forming a seat and secondly a mobile closing member designed to move from an open position to a closed position under the action of the pressure present in said cooking cavity, in said In the open state, the movable closure member is spaced from the seat and allows airflow to escape from the cavity, and in the closed state, the movable closure member is in sealing contact with the seat thereby sealing the cavity. [0003] The invention per se also re...

AI Technical Summary

Problems solved by technology

[0006] Although these known relief valves generally meet the requirements, they suffer from certain deficiencies

[0007] In particular, known relief valves sometimes attempt to finely and repeatedly adjust the cavity from a leaking condition to a tight condition, which can be detrimental to the operation of the appliance if closure of the cavity occurs too early , while the cavity still contains air, or even if the cavity is closed too late, a leakage flow is maintained which prevents or prevents the operating temperature and operating pressure of the appliance from being raised

[0008] Although considerations have been given to improving the reliability of the relief valve, proposed solutions include implementing complex systems, sometimes requiring particularly precise assembly of micro-marked components, which tend to complicate the manufacture of the valve and increase the cost of the appliance

[0009] Furthermore, the harsh environment to which known relief valves are exposed can also cause failures, for example due to accumulation of dirt or scale in said valves, or due to corrosion, or even damage due to fatigue or aging of their materials

[0010] Furthermore, it can happen that the known relief valves do not fully comply with the requirements in certain situations of use of the pressure cooker

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