摘要:
The method comprises the following steps: depositing the coating (20) to be treated on a first face (11) of the dielectric support (10); depositing a layer (30) of electrically conductive material on a second face (12) of the dielectric support (10) opposite to the first face and generally parallel thereto, the thickness of said layer (30) being of the same order as the penetration depth .delta. in the material thereof of the selected electromagnetic wave; and applying microwave energy to the assembly thus constituted in such a manner that the direction of vibration of the electric field is substantially parallel to the coating (20) to be treated and to the layer (30) of conductive material.
摘要:
The installation includes a microwave heater station (14) having a microwave applicator, and a support (10) suitable for supporting the receptacles (12) in the heater station. The support (10) has at least one receptacle zone (20) which is defined by the surface (10A) of the support and by a metal band (24A, 24B) fixed to the support. The zone (20) serves to support a receptacle (12) whose bottom stands on the surface (10A) of the support and whose side wall (12B) is surrounded by the band. The support can be a conveyor bringing the receptacles into the heater station.
摘要:
The installation comprises a microwave heater station (14) having microwave application means, and a support (10) suitable for supporting the receptacles (12) in the heater station. The support (10) has at least one receptacle zone (20) which is defined by the surface (10A) of said support and by a metal band (24A, 24B) fixed to the support. The zone (20) serves to support a receptacle (12) whose bottom stands on the surface (10A) of the support and whose side wall (12B) is surrounded by the band. The support can be a conveyor bringing the receptacles into the heater station.
摘要:
A process for controlling the microwave heating of a product to a temperature which is higher than or equal to a determined temperature for a period which is longer than or equal to a determined period, a marking support and a receptacle for product intended for such a control. Measurement is made of the resistivity of a thermally crosslinkable ink filled with conductive particles, with which the product or the receptacle containing the product has been previously marked and the resistivity of which is arranged to decrease in a predetermined manner in relation to the temperature and the period of microwave heating. The invention is applicable especially to the control of the sterilization of a pharmaceutical or agri-foodstuff product.
摘要:
A microwave applicator device for the treatment of sheet or lap products comprising a housing defining a parallelepipedal waveguide cavity with dimensions a.times.b.times.L in an orthogonal coordinate system Ox, Oy, Oz, the housing being aligned along Oz and provided with slots for passing the product to be treated into the cavity along a plane parallel to the Ox, Oz plane, and means a microwave generator for exciting the cavity in Transverse Electric Mode, in order to create an electric field (E) internal to the cavity along a direction substantially parallel to Ox. The housing is such that the dimension a of the cavity is greater than a value substantially equal to the dimension b of the cavity.
摘要翻译:一种用于处理片材或卷材产品的微波施加器装置,包括在正交坐标系Ox,Oy,Oz中限定尺寸为a * b * L的平行六面体波导腔,壳体沿着Oz对齐并且设置有用于通过的槽 要沿着与Ox,Oz平面平行的平面处理成腔的产品,并且是指在横向电模式下激发腔的微波发生器,以便沿着方向产生腔内部的电场(E) 基本上平行于Ox。 壳体使得腔的尺寸a大于基本上等于腔的尺寸b的值。
摘要:
Disclosed is a tray including at least one deformable wall. The product contained in the tray is heated, the vapour produced by the heating being allowed to escape through an opening in the pack. The product is heated, being taken to a desired temperature, a temperature-holding stage is carried out, the vapour being allowed to escape, a gaseous fluid is introduced into the pack at the end of this temperature-holding stage and the pack is closed totally.
摘要:
A microwave applicator device for continuous heat treatment of elongate products comprises an applicator housing that defines a generally rectangular waveguide cavity and at least one excitation system for exciting the cavity with microwaves propagating in TE.sub.01 transverse electric mode, the system including at least one microwave generator associated with a feed waveguide connected to the cavity via a window formed through a wall of the cavity. The front and rear walls of the feed waveguide are respectively connected to the front and rear edges of the window, and the feed waveguide is associated with a guide flap extending in the cavity in the vicinity of the rear edge of the window, and with a guide member provided substantially facing the window. The front and rear walls of the feed waveguide include respective front and rear connection portions situated in the connection zone for connection with the window, and each being curved forwards substantially in the form of an arc of a circle, the guide flap is situated substantially in line with the rear connection portion, and the excitation system includes means for adjusting wave coupling.
摘要:
An installation for continuously treating a granular or powdered product. The installation includes at least one microwave applicator which is connected to a generator by a coupling device. The installation further includes a dielectric duct which has an axis and an internal surface. The dielectric duct passes through the applicator and contains a rotating metal screw for conveying the granular or powdered product therethrough. This is accomplished by constructing the screw so that it includes at least one helically wound wire which extends longitudinally through the duct at a radial distance from the axis of the duct and proximate the internal surface of the duct. An annular clearance is thereby defined between the wire and the internal surface of the duct.
摘要:
Container designed to contain a product having to be heated by applying microwaves, the container having a side wall (10) and an end wall (12) formed by a base or a lid and means (10A) for limiting the penetration of the microwaves through the side wall (10), compared with the penetration of the microwaves through a central region of the end wall (12). Advantageously, the container according to the invention further comprises means (12A) for concentrating the microwaves in a central region of the end wall (12), the said means being formed by an excess thickness of a dielectric material, the dielectric constant of which is at least equal to 1.5, preferably greater than 2.
摘要:
A method and device (1) for melting an organic product (4) by microwaves. e device (1) comprises electromagnetic field produced by at least one waveguide (6) for microwaves fastened to a metal receptacle (3) containing the initial solid organic product (4). The microwaves effect the melting of the solid (4) with the formation of an upper liquid layer (11). Means (12) make it possible to erode the still solid part of the product (4) which is in contact with the liquid (11).