Abstract: A microwave heating apparatus and a method of operating a microwave heating apparatus are provided. The microwave heating apparatus includes a microwave source for generating microwaves, a transmission line for transmitting the generated microwaves from the microwave source to a cavity, a measuring device that measures the power of microwaves transmitted from the microwave source and a receiving device that receives operational data indicative of the power supplied to the microwave source. The microwave heating apparatus further includes a control unit adapted to adjust the impedance of the transmission line and/or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data in order to control the efficiency of the microwave source. The microwave heating apparatus improves control of the microwave source efficiency.

Abstract: A microwave heating apparatus and a method of operating a microwave heating apparatus are provided. The microwave heating apparatus comprises a load receiving cavity, at least one microwave source, a plurality of feeding ports connected to the microwave source and the cavity for feeding microwaves to the cavity, a measuring unit and a control unit. The measuring unit measures, for at least one frequency or within a frequency range, the power of microwaves reflected back to the microwave source for at least part of the plurality of feeding ports. The control unit selects at least one of the feeding ports based on the measured powers of the reflected microwaves in order to feed microwaves to the cavity via the at least one selected feeding port during operation of the microwave heating apparatus at the at least one frequency or within the frequency range.

Abstract: A microwave heating apparatus and a method for heating/browning a piece of food by means of microwaves are provided. The microwave heating apparatus comprises a cavity arranged to receive, in a substantially horizontal browning region, a piece of food to be browned. The microwave heating apparatus further comprises a microwave source for generating microwaves and a rotatable antenna arranged at the cavity bottom for supplying the generated microwaves. The antenna is configured to produce at least one radiating lobe pointing towards the browning region such that the intersection between the radiating lobe and the browning region forms a hot spot, thereby forming a ring-shaped heating pattern in the browning region under rotation of the antenna. The present invention is advantageous in that a microwave heating apparatus with an improved crisp function is provided.

Abstract: A microwave heating apparatus for heating a load by means of microwaves is provided. The microwave heating apparatus comprises a cavity arranged to receive a piece of food to be heated, a first microwave supply system configured to supply microwaves at the cavity bottom for energizing a browning function in the cavity, a second microwave supply system configured to supply microwaves into the cavity for exciting cavity modes and a control unit configured to control the first and second microwave supply systems based on a food category and/or a cooking program. The first supply system comprises at least one microwave source and at least one antenna arranged in a lower part of the cavity and the second microwave supply system comprises at least one microwave source and at least one feeding port arranged in an upper part of the cavity. The present invention is advantageous in that a microwave heating apparatus with an improved crisp function is provided.

Abstract: A method of operating a microwave oven and a microwave oven are disclosed. The microwave oven comprises a magnetron for providing microwave power to heat a load placed in the microwave oven, and a solid-state microwave generator for providing microwave power to sense presence and/or determine nature of the load in the microwave oven.

Abstract: A microwave oven includes a heating cavity, a tray for supporting foodstuff to be heated inside the cavity, a driver including a motor and a shaft protruding into the cavity for moving the tray along a predetermined pattern, and a supporting frame with rollers interposed between the bottom of the heating cavity and the tray. The supporting frame comprises a first group of rollers adapted to be guided on the bottom of the heating cavity along a first direction, and a second group of rollers adapted to be guided on a lower surface of the tray along a second direction substantially perpendicular to the first direction, so that the overall movement of the tray is an orbital movement.

Abstract: The present invention relates to a browning accessory for use in a microwave oven, for substantially simultaneous microwave cooking and browning or crusting of a food item. The browning accessory includes a microwave absorbing material operative to convert microwave energy into thermal energy and having its underside uncovered, thereby being accessible to airflow inside the microwave oven, and an outer enclosure having a skirt portion extending downwards below the microwave absorbing material to reduce convection cooling of the microwave absorbing material during use of the accessory.

Abstract: A modular microwave oven and ventilation hood combination system, includes a core module, having a core module housing, and a microwave cooking chamber, fitted in the core module housing. The system further includes an intake module, having an intake module housing connected to a lower side of the core module housing, and an air inlet for drawing air from an area above a range.

Abstract: A modular microwave oven and ventilation hood combination system, includes a core module, comprising a core module housing, and a microwave cooking chamber, fitted in said core module housing. The system further includes an intake module, comprising an intake module housing connected to a lower side of the core module housing, and an air inlet for drawing air from an area above a range.

Abstract: A microwave oven for use in cooking food having a door and door mounted controls and a cooling system where the door mounted controls are disclosed. The microwave oven having an external enclosure defining an outer cabinet and an oven cavity supported within the external enclosure where the oven cavity has a front access opening. The door is rotatably supported adjacent the external enclosure for selectively closing the access opening. A control unit is mounted within the door and a ventilation cooling path is formed within the door for cooling the control unit mounted with the door. A blower is supported within the external enclosure for directing an air flow toward the door and into the ventilation cooling path. The microwave can further include a housing which is supported within the door for enclosing the control unit and where the housing forms part of the ventilation cooling path.

Abstract: A microwave oven for use in cooking food having a door and door mounted controls and a cooling system where the door mounted controls are disclosed. The microwave oven having an external enclosure defining an outer cabinet and an oven cavity supported within the external enclosure where the oven cavity has a front access opening. The door is rotatably supported adjacent the external enclosure for selectively closing the access opening. A control unit is mounted within the door and a ventilation cooling path is formed within the door for cooling the control unit mounted with the door. A blower is supported within the external enclosure for directing an air flow toward the door and into the ventilation cooling path. The microwave can further include a housing which is supported within the door for enclosing the control unit and where the housing forms part of the ventilation cooling path.

Abstract: A browning accessory for use in a microwave oven, for substantially simultaneous microwave cooking of a food item and browning or crusting the upper side thereof, is disclosed. The browning accessory comprises a microwave absorbing material operative to convert microwave energy into thermal energy; and an outer enclosure comprising a skirt portion extending downwards below the microwave absorbing material, in the working position of the accessory, such as to reduce convection cooling of the microwave absorbing material during use of the accessory.

Abstract: A wall mounted type microwave oven having an external enclosure including a bottom closure wall which includes a suction opening and a top vent opening and an oven cavity which is supported within the external enclosure. The oven cavity has a rearwardly stepped portion to maximize the usable space provided within the oven cavity. An air exhaust air path is formed between the external enclosure and the oven cavity and includes a bottom plenum, a pair of rear air channels and an upper plenum. The rearwardly stepped area divides the space between the oven cavity and the external enclosure into the two rear air channels. At least one blower is provided within the external enclosure for drawing air into the bottom plenum through the suction opening and exhausting the air out through a top exhaust opening which forms part of the top vent opening.

Abstract: A wall mounted type microwave oven having an external enclosure including a bottom closure wall which includes a suction opening and a top vent opening and an oven cavity which is supported within the external enclosure. The oven cavity has a rearwardly stepped portion to maximize the usable space provided within the oven cavity. An air exhaust air path is formed between the external enclosure and the oven cavity and includes a bottom plenum, a pair of rear air channels and an upper plenum. The rearwardly stepped area divides the space between the oven cavity and the external enclosure into the two rear air channels. At least one blower is provided within the external enclosure for drawing air into the bottom plenum through the suction opening and exhausting the air out through a top exhaust opening which forms part of the top vent opening.

Abstract: A microwave oven and a method for heating a load which is placed therein. According to the invention a predetermined mode in the cavity of a microwave oven is fed by means of an associated feeding port which is arranged to feed essentially the intended mode only, the feeding of a mode other than the intended, predetermined mode being essentially prevented.

Abstract: A distributed microwave system comprising a single microwave source that can be used to supply one or more microwave-using devices. The microwave source is located remotely from the microwave-using devices and connected thereto by a microwave conduit.

Abstract: The invention relates to serial microwave feeding to a cavity of a microwave oven in order to provide heating of a load that is placed in the cavity. Any microwave radiation that is reflected from a first feeding port is directed, preferably via a microwave circulator, to a second feeding port. The radiation that is reflected from the first feeding port is thus fed to the cavity via the second feeding port.

Abstract: A microwave oven comprising a number of IR-sensors elements for obtaining temperature information from discrete sensing areas within the cooking zone of the oven and for generating a two-dimensional temperature image of the cooking zone. Based on said temperature image necessary load parameters may be calculated for controlling automatic heating procedures in the oven, thereby facilitating operation of the oven and securing a good cooking result.

Abstract: A method for the heating of beverages or foodstuffs in fluid form contained in a package or container which is placed in a microwave oven whose cavity is adapted as to the dimensions and shape of the package or container. When the target temperature of the beverage or foodstuff is reached, heating is ceased. A microwave oven for such heating includes a package-adapted cavity and control means for ceasing heating when the target temperature is reached, which can be sensed by incorporated means for sensing moisture release, IR radiation from the beverage or foodstuff or means for sensing its light permeability.