Abstract: A device for heat-treating products using microwaves includes an enclosure (2), a drum (3) having at least one portion mounted inside the enclosure (2), a spacing (4) defined between the enclosure (2) and the drum (3), a support (5) positioned at least partially in the spacing (4) and designed to receive and transport products to be treated, and at least one module (6) for applying microwaves to the products, designed to introduce microwaves into the spacing (4). The drum (3) has a prism shape, extending according to the axis (30) of the drum (3), and including a plurality of sides (31; 31?; 31?) extending parallel to the axis (30). The enclosure (2) includes, internally, several planar surfaces (20; 20?; 20?) each oriented towards one (31; 31?; 31?) of the sides of the drum (3) and extending parallel to the side of the drum.

Abstract: A stirrer comprises a frame fixed to a drive shaft (6) including coupling means (18) for coupling the drive shaft to a drive motor (8), and according to the invention the stirrer includes at least one bottom scraper segment (15) extending downwards from the frame along a bottom edge thereof, together with adaptor means (14) for changing the distance between the coupling means (18) and a bottom edge (19) of the bottom scraper segment.

Abstract: A microwave oven comprising an enclosure (1) in which a receptacle (2) is disposed, at least one source (3) of microwaves disposed above the receptacle, and a wave spreader (5) mounted to rotate between the microwave source and the inside of the receptacle. The wave spreader comprises at least one tubular waveguide (12, 13) disposed substantially vertically, extending inside the receptacle, and including at least one wave-receiving opening in the vicinity of its top portion and at least one wave-diffusing opening (16, 17) opening out to the inside of the receptacle. The oven also includes means (25) for preventing the receptacle from rotating about a vertical axis.