Pressure cooker having packaged discharging temperature controlled switch

Abstract

#CMT# # / CMT# The appliance has a lid fixed on a vessel to define a sealed enclosure to contain food. A purging unit (4) has an escape opening (5) connected to an interior of the enclosure to an exterior of the appliance. A control unit (10) passes the purging unit from an opening configuration to a closing configuration when a temperature or pressure in the enclosure rises beyond predetermined triggering thresholds. The control unit has a secure activation unit (11) placed in a sealed confinement zone (12) to isolate the activation unit from a gas flow (F) coming from the enclosure. #CMT# : # / CMT# The activation unit is formed by a bimetal element. #CMT#USE : # / CMT# Pressurized food cooking appliance i.e. domestic pressure-cooker. #CMT#ADVANTAGE : # / CMT# The appliance is simple and compact in structure so as to limit the manufacturing cost of the appliance and to improve the aesthetic appearance of the appliance, so that the appliance is easy to maintain. The activation unit is encapsulated in the confinement zone which is sufficiently sealed to separate the activation unit from the gas flow contained in the enclosure and permits the activation unit to escape from the gas flow primarily containing air or water vapor, so that the activation unit is protected from the physicochemical aggressions of the gas flow. The design of the appliance protects the control unit from corrosion, clogging or scaling, thus limiting the risks of mechanical default of the control unit such as triggering threshold or course of moving parts. The purging unit purges the air effectively and accelerates the supply of the air at operating temperature and operating pressure and the integrity and the operation of the purging unit and the control unit to each other is durably preserved, so that robustness of the purging unit and the control unit is improved, thus guaranteeing performance reliability, robustness and longevity of the appliance. The separation of the activation unit and the gas flow allows avoiding any pollution of the cooking atmosphere and food by the units constitutive of the control unit, thus durably guaranteeing the food quality of the appliance. The design of the appliance avoids complexity of manufacture and implementation of the storage and transport units of the fluid such that risk of escape or bursting and failure of the control units related to the fluid exposure at high temperatures and pressures is avoided. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows a longitudinal sectional view of a purging module including a purging unit and a control unit, with the purging unit in an opening configuration. F : Gas flow 4 : Purging unit 5 : Escape opening 10 : Control unit 11 : Secure activation unit 12 : Sealed confinement zone.

Description

technical field [0001] The present invention relates to the general field of appliances for cooking under pressure, more particularly to domestic cooking appliances of the pressure cooker type. [0002] More particularly, the present invention relates to a cooking appliance for cooking food under pressure, the appliance comprising a container and a lid arranged to be fastened to said container to define a substantially closed enclosure for containing food. housing, the appliance is provided with: [0003] - discharge means capable of allowing air to escape from the housing at the start of cooking, said discharge means comprising: a leak opening connecting the inside of the housing with the outside of the appliance; and a closure member in contact with The leaks cooperate to enable the discharge means to alternate between an open configuration and a closed configuration in which they provide communication between the interior of the housing and the exterior of the appliance ,...

AI Technical Summary

Problems solved by technology

[0010] Although known air discharge devices are generally satisfactorily arranged, they still suffer from certain drawbacks

[0011] First, the operation of the air discharge mechanism needs to be carefully set so that the casing neither closes too quickly while the casing still contains air, nor closes too late to avoid pointlessly keeping the casing Temperature and pressure rises in the body or slowing leak flows require particularly precisely calibrated components that are manufactured and assembled together, complicating the manufacturing process and increasing the cost of the appliance

[0012] In addition, exposure of the discharge mechanism to particularly severe conditions can cause said mechanism to fail, for example by becoming clogged, fouled, or corroded, with the result of such failure reducing the performance of the appliance and indeed significantly shortening the its lifespan

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