Abstract

A variable-frequency driving circuit and a cooking apparatus that includes at least two heating elements, and the at least two heating elements include a microwave generator. The variable-frequency driving circuit includes: a power circuit having a first switch element configured to adjust the output power of the power circuit. The power circuit is connected to a common connecting terminal of the at least two heating elements; a load selection circuit, the load selection circuit being connected to the power circuit, the load selection circuit having at least two output terminals, and the at least two output terminals being configured to connect to a corresponding heating element; and a control circuit configured to determine a target output power and a target heating element of the at least two heating elements according to received control information, as well as control the first switch element to act according to the target output power.

IPC Classes  ?

• H05B 6/68 - Circuits for monitoring or control
• H05B 1/02 - Automatic switching arrangements specially adapted to heating apparatus
• H05B 6/66 - Circuits

Abstract

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio of the height H1 of the tube core to a height H2 of the output ceramic ranges from 0.4 to 2.3.

IPC Classes  ?

• H05B 6/72 - Radiators or antennas
• H03B 9/10 - Generation of oscillations using transit-time effects using discharge tubes using a magnetron

Abstract

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio H1/S of a height H1 of the tube core to a cross-sectional area S of the antenna ranges from 0.4 to 3.3.

IPC Classes  ?

• H05B 6/72 - Radiators or antennas
• H03B 9/10 - Generation of oscillations using transit-time effects using discharge tubes using a magnetron

Abstract

Disclosed in the present application are a magnetron and a cooking utensil. The magnetron comprises a magnetic circuit assembly and a vacuum tube, wherein the magnetic circuit assembly is provided with a closed magnetic circuit and a mounting space; the vacuum tube matches the magnetic circuit assembly; part of the vacuum tube is located in the mounting space and on the closed magnetic circuit; a cathode assembly, an anode assembly and two magnetism-gathering members are provided in the vacuum tube; the two magnetism-gathering members are spaced apart on the closed magnetic circuit and form a middle region; part of the structure of the cathode assembly and part of the structure of the anode assembly are arranged in the middle region; the side surfaces of the two magnetism-gathering members facing the middle region are both magnetism-gathering end surfaces; and a notch structure is provided on the magnetism-gathering end face of at least one magnetism-gathering member. According to the magnetron of the present application, the middle region is formed between the two magnetism-gathering members, and part of the structure of the anode assembly and part of the structure of the cathode assembly are arranged in the middle region. Notches are provided, and magnetic lines of force propagate through the positions of the remaining bodies of the magnetism-gathering end surfaces, thus enhancing the magnetic field intensity of the middle region and improving the output power of the magnetron.

IPC Classes  ?

• H01J 25/50 - Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field

Abstract

A control method for a microwave cooking appliance and a microwave cooking appliance. The control method for a microwave cooking appliance comprises: when a magnetron of the microwave cooking appliance is turned off, acquiring information of food in a chamber of the microwave cooking appliance; according to the information of food, determining a target power of the magnetron; and, according to the target power, controlling a power supply module of the microwave cooking appliance to supply power to the magnetron, such that the output power of the magnetron is consistent with the target power. The described control method for a microwave cooking appliance can acquire information of food in a chamber, and determine a target power of a magnetron according to the information of food in the chamber, so as to control a power supply module to supply power to the magnetron according to the target power, such that the output power of the magnetron is consistent with the target power, thereby achieving automatic identification and autonomous control of food, improving the intelligent degree of microwave cooking appliances, and simplifying user operation.

IPC Classes  ?

• H05B 6/68 - Circuits for monitoring or control

Abstract

A driving power source (100) and a control method therefor, and a heating apparatus (1000) and a microwave cooking device. The driving power source (100) comprises a rectifying and filtering circuit (10), a frequency conversion circuit (20), and a processing circuit (30), wherein the frequency conversion circuit (20) comprises a transformer (21) and a switching device (22) connected to a primary coil (211), and a secondary coil (212) is connected to a magnetron (200); the rectifying and filtering circuit (10) is connected to an alternating-current power source (300), and the primary coil (211) is connected to the rectifying and filtering circuit (10); and the processing circuit (30) controls the switching device (22) to turn on and off and is used for determining, when a measured electrical parameter of the switching device (22) meets a preset condition, that the magnetron (200) is overheated and adjusting the electrical parameter, such that the magnetron (200) becomes no longer overheated.

IPC Classes  ?

• H05B 6/66 - Circuits
• H05B 6/68 - Circuits for monitoring or control

Abstract

A heating method, a microwave cooking device (10), and a computer-readable storage medium. The heating method comprises: transmitting a detection signal, the detection signal being used for acting on a food material and causing the food material to generate a reflection signal; according to characteristic parameters, generating heating mode information, at least some of the characteristic parameters being determined by means of the detection signal and the reflection signal; and according to the heating mode information, determining a heating mode for the food material, the heating mode corresponding to the type of the food material.

IPC Classes  ?

• H05B 6/64 - Heating using microwaves

Abstract

A control circuit (100) and a microwave generation device (200). The control circuit (100) is used for the microwave generation device (200). The microwave generation device (200) comprises a magnetron (36). The control circuit (100) comprises a transformer assembly (12) and a switch part (20). The transformer assembly (12) comprises a primary winding (14), a first secondary winding (16) and a second secondary winding (18). The primary winding (14) is located on a primary side of the transformer assembly (12), and the first secondary winding (16) and the second secondary winding (18) are located on a secondary side of the transformer assembly (12). The first secondary winding (16) and the cathode (37) of the magnetron (36) form a filament circuit (26). The switch part (20) comprises a switch element (22) and a control element (24). The switch element (22) is located in the filament circuit (26). The control element (24) is electrically connected to a control winding (19), and the control element (24) is used for controlling, under the condition that a current change occurs in the control winding (19), the switch element (22) to turn off or turn on the filament circuit (26). The control winding (19) is one of the windings of the transformer assembly (12), and the control winding (19) and the anode (38) of the magnetron (36) form an anode circuit (27).

IPC Classes  ?

• H01J 23/34 - Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for

Abstract

The present application provides a variable-frequency driving circuit and a cooking apparatus, the variable-frequency driving circuit being used for the cooking apparatus. The cooking apparatus comprises at least two heating elements, and the at least two heating elements comprise a microwave generator. The variable-frequency driving circuit comprises: a power loop, the power loop comprising a first switch element, the first switch element being used to adjust the output power of the power loop, and the power loop being connected to a common connecting terminal of the at least two heating elements; a load selection circuit, the load selection circuit being connected to the power loop, the load selection circuit having at least two output terminals, and the at least two output terminals being used to connect to a corresponding heating element; and a control circuit, connected to a control terminal of the first switch element and the load selection circuit, and used to determine a target output power and a target heating element of the at least two heating elements according to received control information, as well as control the first switch element to act according to the target power, and control the load selection circuit to select the target heating element to power on and operate.

IPC Classes  ?

• H05B 6/66 - Circuits
• H05B 6/68 - Circuits for monitoring or control

Abstract

A magnetron and a microwave heating device. The magnetron comprises a tube core (21), a first tube housing (21a), a second tube housing (21b), output ceramic (22), an antenna cap (23), and an antenna (24). The first tube housing (21a), the tube core (21), the second tube housing (21b), the output ceramic (22) and the antenna cap (23) are connected in sequence. The antenna (24) extends into the tube core (21), and sequentially passes through the second tube housing (21b) and the output ceramic (22) and then extends into the antenna cap (23). The height H1 of the second tube housing (21b) relative to the tube core (21) is not greater than 14 millimeters, and the ratio H1/S of the height H1 of the tube core (21) to the cross-sectional area S of the antenna (24) is within the range of 0.4 to 3.3.

IPC Classes  ?

• H01J 25/50 - Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field

Abstract

A magnetron and a microwave heating device. The magnetron comprises a tube core (21), a first tube shell (21a), a second tube shell (21b), an output ceramic (22), an antenna cap (23) and an antenna (24). The first tube shell (21a), the tube core (21), the second tube shell (21b), the output ceramic (22) and the antenna cap (23) are connected in sequence. The antenna (24) extends into the tube core (21), and sequentially passes through the second tube shell (21b) and the output ceramic (22) and extends into the antenna cap (23). The height H1 of the second tube shell (21b) relative to the tube core (21) is not greater than 14 mm, and the ratio of the height H1 of the tube core (21) to the height H2 of the output ceramic (22) is within the range of 0.4 to 2.3.

IPC Classes  ?

• H01J 23/54 - Filtering devices preventing unwanted frequencies or modes to be coupled to, or out of, the interaction circuitPrevention of high frequency leakage in the environment

Abstract

A magnetron, comprising a magnetron heat dissipation element used for heat dissipation of the magnetron, the magnetron heat dissipation element comprising a central heat conducting body (1) for coating the outer side wall of an anode cylinder (161), a heat transfer plate (2) extending outward from the central heat conducting body (1), and a plurality of cooling fin sets arranged vertically on at least one face of the heat transfer plate (2) and being spaced apart from each other, a direct current air duct (3) being correspondingly formed between adjacent cooling fin sets; whilst the magnetron heat dissipation structure and the mounting structure of same with a black ball assembly are simplified as much as possible, the magnetron can increase the heat transfer efficiency between the anode cylinder (161) and the magnetron heat dissipation element and inside the magnetron heat dissipation element, thereby improving the heat dissipation efficiency of the magnetron.

IPC Classes  ?

• H01J 23/00 - Details of transit-time tubes of the types covered by group
• H01J 25/50 - Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field