Abstract: It is a problem of the invention to provide a microwave heating apparatus capable of realizing small-sized formation of the apparatus while preventing occurrence of a nonuniformity in heating caused by a deviation of a position of mounting an electricity feeding port.

Abstract: A problem of the invention is to provide a heating cooker capable of producing a uniform baking mark at a total of an object at inexpensive cost by a single piece of a rod-like heater in a heating cooker interposing a face member between the object and the rod-like heater. A heating cooker (100) for heating to process an object placed on a mounting base of a heating chamber (51) including at least a single piece of a rod-like heater arranged along a face member forming the heating chamber (51) and a heat shielding member provided along a longitudinal direction of the rod-like heater between the rod-like heater and the face member (53a) on an outer side of the heating chamber (51).

Abstract: A high-frequency heating apparatus capable of simultaneously heating different kinds of objects to appropriate temperatures includes: a power feed portion provided on a right side wall forming a heating chamber; a mounting table on which to mount objects to be heated; a rotating support of an improved structure; a drive motor; a temperature detection means having an area in front of the power feed portion as a detection area; and a control means; wherein high-frequency radiation variations are formed by the power feed portion and the rotating support and, based on a signal from the temperature detection means, the control means identifies positions of the objects on the mounting table and controls the drive motor to move the lower-temperature object to where a high-frequency radiation is strong to eliminate insufficient heating of the object and to simultaneously heat a plurality of objects to appropriate temperatures.

Abstract: The invention provides a high-frequency heating apparatus capable of simultaneously heating different kinds of objects to appropriate temperatures.

Abstract: A compact and highly controllable impedance-varying-unit, a microwave device using the same unit, and a high-frequency-heating appliance using the same unit are provided. The impedance varying unit includes a rectangular waveguide-section as a main body made of metallic material, an open end of waveguide-section working on microwave in a microwave cavity, a terminal end of waveguide-section closed by metallic material, a rotary movable body made of non-metallic material, and a driver for the movable body. A rotating angle or a position of the movable body is controlled, so that an impedance at the open end is varied and transmission status of microwave is changed, thereby variably controlling a standing wave distribution. Controlling the standing wave distribution allows an object in the cavity to be selectively heated or uniformly heated. Further, the standing wave produced in the microwave cavity is sequentially varied, so that the object can be selectively heated or uniformly heated.

Abstract: A filter regenerating apparatus for an internal combustion engine is disclosed.

Abstract: An apparatus for regenerating a filter provided to scavenge particulate which is included in exhaust gas discharged from an internal combustion engine. The apparatus includes a heating room accommodating the filter, a heat-combusting device for heat-combusting the particulate scavenged by the filter, a microwave generating device for generating a microwave to be supplied to the heating room, a slit provided in a wall of the heating room, a microwave detecting device for detecting the energy level of the microwave coupled through the slit, and a control section for controlling the heat-combusting device.

Abstract: A magnetron device includes an anode cylinder incorporated with multi-resonant cavities, an output antenna arranged in a direction normal to the axis of the anode cylinder, a set of strap rings arranged through holes in vanes, an antenna lead having one end directly connected to the strap ring, and its other end connected to the output antenna, and an exhaust pipe provided at one end of the anode cylinder. Accordingly the magnetron device operates with high efficiency, is compact and produces a relatively low level of noise.

Abstract: A microwave heating apparatus is arranged such that the output from a single semiconductor oscillator is divided into two parts by a power divider and the parts are amplified by a pair of respective amplifiers and the amplified parts are fed into a heating chamber by two antennas, the phase of the two microwave parts being adjusted so as to combine their power in the heating chamber.

Abstract: In an apparatus which produces high frequency electromagnetic waves, a choke portion is provided in a leakage transmission path, which choke portion has a groove wall corresponding to a grounded conductor, a number of strip conductors arranged with a line width a and a pitch p, and a groove bottom, so as to minimize leakage propagation in the longitudinal direction of the groove. Further, this choke portion is designed so that the characteristic impedance of its portion is changed in a region shorter than .lambda./4 of the frequency to be used. As a result, the depth and width of the groove can also be made less than .lambda./4.

Abstract: A high-frequency heating appliance includes a high-frequency heating source constituted of a solid state high-frequency generating section with its oscillation frequency in the 915 MHz band, a heating chamber which, in the frequency band, produces the TE.sub.201 mode providing an electric field uniform in the direction of the height of the heating chamber, and a door constituting one wall of the heating chamber for access to the heating chamber to insert and remove an object of heating. The high-frequency heating source is located substantially in the middle of the upper or lower wall surface of the heating chamber and remote from the upper and lower hinges of the door.

Abstract: A microwave oven comprising a heating cavity, a controllable frequency microwave power source, a detector for detecting the intensity of the electric field in the cavity and control means for setting the microwave power source at the frequency as determined by the intensity of the electric field. The frequency at which the loaded cavity is energized is selected by the control means to store high power in the cavity. The dimensions of the cavity are selected for generating only the TE.sub.m0p mode at the frequency of the microwave power source which is limited to 915.+-.13 MHz, where 0 is the mode index in the direction of the height of the cavity.

Abstract: A method of food heating control in which the heating time length (.tau..sub.o) from a time point (t.sub.1) when the food temperature changing with the heating thereof reaches a predetermined set value (T.sub.1) to a time point (t.sub.2) when the vapor or gas liberated by heating of the food begins to increase the humidity or gas concentration is used as a basis for automatically determining a subsequent heating time length (.tau..sub.R). Since the time period (.tau..sub.R) for the subsequent heating process is determined by the heating time from the time point when the food temperature reaches a predetermined set value to the time point when the humidity or gas concentration begins to increase (unlike in the prior art method in which the heating time from the start of heating to the time point when humidity begins to increase is used to determine the subsequent heating time), the error in the heating time which otherwise might be caused by the variation in the initial food temperature is obviated.

Abstract: A food heating method and apparatus are disclosed in which a heating time length suitable to the food to be cooked is determined by automatically detecting a change in humidity or concentration of the vapor or gas respectively liberated from the food. The initial temperature of the food is measured, and an additional heating time length is calculated from the measured initial temperature and the heating time length required before the detection of the humidity or gas concentration as the case may be, thus determining a total heating time length for properly cooking up the food.

Abstract: A heat-cooking apparatus such as an electronic oven of the type having an oven cavity, a heat source, an infrared detecting equipment adapted to detect the rate of radiation of the infrared rays from the surface of the material under cooking and a controller for controlling the heat source in accordance with the output from the infrared detecting equipment. The infrared detecting equipment includes a reflective plate and a shield cylinder which in combination ensure highly efficient and accurate detection of infrared rays over a long period of time.

Abstract: In an apparatus which produces high frequency electromagnetic waves, a choke portion is provided in a leakage transmission path, which choke portion has a groove wall corresponding to a grounded conductor, a number of strip conductors arranged with a line width a and a pitch p, and a groove bottom, so as to minimize leakage propagation in the longitudinal direction of the groove. Further, this choke portion is designed so that the characteristic impedance of its portion is changed in a region shorter than .lambda./4 of the frequency to be used. As a result, the depth and .[.width.]. .Iadd.clearance .Iaddend.of the groove can .[.also.]. .Iadd.both .Iaddend.be made less than .lambda./4.