16results about "Magnetrons" patented technology

The application discloses a cathode filament, a cathode assembly, a magnetron and a microwave cooking electric appliance. The cathode filament is used for the magnetron, the cathode filament is in a spiral structure, the cathode filament comprises two non-main emission areas and a main emission area, the two non-main emission areas are connected to two sides opposite to the main emission area along the length direction of the cathode filament, and the pitch of the non-main emission area is greater than the pitch of the main emission area. In the cathode filament, the pitch of the non-main emission area outside the main emission area is greater than the pitch of the main emission area, the stress of the non-main emission area can be more dispersed, the stress of the cathode filament at the non-main emission area can be effectively reduced, and the breaking resistance of the cathode filament after carbonization is improved.

The application discloses a cathode filament, a cathode assembly, a magnetron and a microwave cooking appliance. The cathode filament has a spiral structure, and a filament material of the cathode filament comprises a filament core and a carbonized layer, the carbonized layer at least wraps the filament core in a circumferential direction of the filament core, a material of the filament core comprises lanthanum tungsten material, and the carbonized layer comprises a lanthanum tungsten carbonized layer. In the cathode filament, the material of the filament core comprises the lanthanum tungsten material, and the carbonized layer comprises the lanthanum tungsten carbonized layer, which reduces the work function of the cathode filament to a certain extent, improves the migration ability of rare earth elements in the cathode filament, and thus the electron emission ability of the cathode filament can be improved to a certain extent, so that the magnetron can adapt to more power requirements of the microwave cooking appliance.

This invention provides a high-frequency magnetron structure and vacuum device. The high-frequency magnetron structure includes: an anode tube with an anode resonant cavity; the outer peripheral sidewall of the anode tube includes at least two output structures; the output structure includes an output coupling port that penetrates the anode tube wall and communicates with the anode resonant cavity; and a microwave channel that communicates with the output coupling port. The high-frequency magnetron structure provided by this application is compact, small in size, low in cost, light in weight, requires low voltage, has a low magnetic field, requires a simple operating power supply, and has good phase stability. It also improves the output power of the magnetron and reduces the risk of high-frequency breakdown at the output coupling port. It is suitable for applications requiring high-power microwaves and can meet the high-power microwave requirements of most applications, especially in millimeter-wave, short-millimeter-wave, and even terahertz frequency bands.

This invention discloses an oxide cathode and its sintering apparatus. The oxide cathode includes a cathode cylinder and a porous sponge layer. The cathode cylinder has two annular stepped surfaces, which are spaced apart from each other along the axial direction of the cathode cylinder. The cathode cylinder also has a sintering region located between the two stepped surfaces. The sponge layer is disposed within the sintering region, with its two ends respectively attached to the two stepped surfaces. Simultaneously, the sponge layer does not protrude from the stepped surfaces radially within the cathode cylinder. This invention can effectively suppress the axial scattering of electrons from the non-emission region of the oxide cathode, reduce interference with high-frequency fields, reduce the bombardment of the magnetron anode end cap by scattered electrons from the non-emission region, effectively solve the oxidation problem of the anode end cap during magnetron use, and improve the overall performance of the magnetron.

The utility model discloses a magnetron assembly of adjustable magnetic field, including magnetron main part, and magnetron main part includes cathode assembly and anode assembly, and the cathode assembly place is provided with permanent magnet no.

An electron tube (100) is provided including: a cathode (3) that emits thermoelectrons; an anode including a plurality of anode pieces (4) arranged, so as to surround the cathode (3), in an anode cyli

The application discloses a cathode electron emitter, a cathode assembly, a magnetron and a microwave cooking electric appliance. The cathode electron emitter is used for the magnetron and is in a cylindrical shape. The cathode electron emitter is in the cylindrical shape, so that the internal stress of the cathode electron emitter can be effectively improved, and the defective rate of the cathode electron emitter can be reduced to a certain extent.

An inspection system comprises: a radiation source; a detector configured to detect a signal when radiation emitted by the radiation source acts on the inspected object; and a processor in communication connection with the radiation source and configured to determine at least one periodic radiation combination corresponding to a type of the object according to the type of the object, select periodic radiation combinations respectively corresponding to at least two different portions of the object in the at least one periodic radiation combination, and cause the radiation source to emit radiation to the at least two corresponding different portions in selected periodic radiation combinations during the time that the object is scanned, wherein a periodic radiation combination is a chronological arrangement of at least one radiation pulse output by the radiation source in each scanning period. An inspection method is also provided.

The application discloses a cathode filament, a cathode assembly, a magnetron and a microwave cooking appliance. The cathode filament comprises a filament core and a carbonized layer, the carbonized layer at least wraps the filament core in the circumferential direction of the filament core, the material of the filament core comprises lanthanum tungsten material, the carbonized layer comprises a lanthanum tungsten carbonized layer, and the working voltage of the cathode filament is 2.0-2.6 volts or the working current is 7-8.8 amperes. In the cathode filament, the material of the filament core comprises lanthanum tungsten material, and the carbonized layer comprises a lanthanum tungsten carbonized layer, so that the electron emission capacity of the cathode filament can be improved to a certain extent, the cathode filament can stably emit electrons at a lower working voltage (2.0-2.6 volts) or working current (7-8.8 amperes), the thermal load of the cathode filament is reduced, and the working temperature of the cathode filament is lowered.

The application discloses a microwave cooking utensil control method, a microwave cooking utensil and a storage medium. The microwave cooking utensil comprises a magnetron, the magnetron comprises a cathode filament, the cathode filament comprises a filament core and a carbonized layer, the carbonized layer at least wraps the filament core in a circumferential direction of the filament core, a material of the filament core comprises lanthanum tungsten material, and the carbonized layer comprises a lanthanum tungsten carbonized layer. The control method comprises the following steps: energizing the magnetron to start the magnetron; and after the magnetron is started, reducing the working power of the cathode filament. In the microwave cooking utensil, the working temperature of the cathode filament can be reduced to a certain extent, and the working life of the cathode filament is prolonged.

A magnetron (10), a microwave appliance (1000), a control method, a control apparatus (200), a microwave cooking appliance (1000) and a storage medium. The magnetron (10) is used for the microwave appliance (1000). The magnetron (10) comprises a filament (131), wherein the wire diameter of the filament (131) is greater than or equal to 0.6 mm and less than or equal to 0.67 mm, and the filament (131) is configured to have a current greater than or equal to 8 A when the microwave appliance (1000) operates at an output power greater than or equal to 50 W.

A cathode filament (100), a cathode electron emitter (500), a cathode assembly (300), a magnetron (200), and a microwave cooking appliance are disclosed. The cathode filament (100) has a spiral structure, the wire material of the cathode filament (100) comprises a filament core (14) and a carburized layer (16), the carburized layer (16) covers the filament core (14) at least in the circumferential direction of the filament core (14), the material of the filament core (14) comprises a lanthanum-tungsten material, and the carburized layer (16) comprises a lanthanum-tungsten carburized layer.

The application discloses a magnetron and a microwave electric appliance. The magnetron comprises a cathode emission system and an anode resonance system; the cathode emission system comprises a cathode; the anode resonance system comprises an anode cylinder, a plurality of anode vanes and a cross-linking ring, the cathode and the anode vanes are located in the anode cylinder, the anode vane comprises a first end face and a second end face which are opposite along a first direction, the first end face is connected with the anode cylinder, and the second end face is spaced from the cathode, wherein the second end face is in a shape of being recessed into the anode vane. In the above-mentioned magnetron, the second end face is in a shape of being recessed into the anode vane, so that the high-frequency field penetrated by the anode resonance system is stronger, and the speed of the electron entering the phase selection and focusing is faster, thereby the starting time of the magnetron can be reduced.

Disclosed are a magnetron (100) and a microwave appliance. The magnetron (100) comprises a cathode emission system and an anode resonant system (12); the cathode emission system comprises a cathode (10); the anode resonant system (12) comprises an anode cylinder (14) and a plurality of anode blades (16); the cathode (10) and the anode blades (16) are located in the anode cylinder (14); each anode blade (16) comprises a first end surface (32) and a second end surface (34) which face away from each other in a first direction; the first end surface (32) is connected to the anode cylinder (14); the second end surface (34) is spaced apart from the cathode (10); and the second end surface (34) is recessed toward the corresponding anode blade (16).

The application discloses a magnetron and a microwave electric appliance. The magnetron is used in the microwave electric appliance. The magnetron comprises a filament, a wire diameter of the filament is greater than or equal to 0.6 mm and less than or equal to 0.67 mm, and the filament is configured to have a current greater than or equal to 8 A when the microwave electric appliance works at an output power greater than or equal to 50 W. By setting the wire diameter of the magnetron filament to be between 0.6 mm and 0.67 mm, the wire diameter of the filament is increased compared with the wire diameter of the filament in the prior art, the resistance of the filament is reduced according to Ohm's law without changing the length and resistivity of the filament, the current of the magnetron is increased when the voltage remains unchanged, and therefore the stability of the microwave oven in microwave output can be improved.