Please select the most similar patent number from A, B, C and D. Which number is?
A microwave heating and drying device and a microwave heating and drying method. The device comprises a lifting mechanism (3), a microwave drying mechanism, a working compartment (7) for accommodating a material and having an opening at the top, and a conveying roller (5) for conveying the working compartment (7) to the lifting mechanism (3). The microwave drying mechanism has a microwave generator (12), a microwave cover (8), and a microwave guide tube (11) connected to the microwave generator (12) and the microwave cover (8). A microwave outlet is provided on a lower portion of the microwave cover (8). The conveying roller (5) is provided on the lifting mechanism (3), and is capable of performing vertical movement together with the lifting mechanism (3). The lifting mechanism (3) is provided below the microwave cover (8). The lifting mechanism (3) is for lifting the working compartment (7) containing a material, such that the opening at the top of the working container (7) contacts the microwave outlet. A first sealing structure for preventing microwave leakage is disposed between the opening at the top of the working compartment (7) and the microwave outlet. The microwave heating and drying device resolves the issue of microwave leakage during a microwave curing process, and improves the utilization rate, as well as the heating and drying efficiency, of the device.
A: Disclosed is a microwave vacuum hot-air drying all-in-one machine, comprising a cabinet (1), a rotary drying frame (2), drying trays (3), a rotating electric motor (4), and magnetrons (5), wherein the rotary drying frame (2) is a layer structure and is arranged in the cabinet (1); the bottom of the rotary drying frame (2) is provided with rotating rollers (6), and the multiple drying trays (3) are evenly distributed on the rotary drying frame (2); the rotating electric motor (4) is arranged at the bottom of the cabinet (1) and is located directly below the rotary drying frame (2); a transmission shaft of the rotating electric motor (4) is connected to a transmission member (7), and the transmission member (7) is connected to the bottom of the rotary drying frame (2); the magnetrons (5) are arranged on an inner side wall of the cabinet (1) and are used to perform microwave drying for materials on the drying trays (3); a side wall of the cabinet (1) is provided with an air inlet (8), and the top thereof is provided with an air outlet (9); and the air inlet (8) is connected to a distributor (10) located in the cabinet (1), and the distributor (10) is arranged facing the rotary drying frame (2). The microwave vacuum hot-air drying all-in-one machine shortens the time for microwave sterilization, and is high speed, saves on energy, and has less additional heat energy loss.
B: A microwave heating device and control method therefor, the microwave heating device comprising: a heating chamber (1), a microwave source (2) used to generate microwaves, a controller (6), a plurality of waveguide ports (3) located on the heating chamber (1), a plurality of radio frequency switches (4) and a plurality of radio frequency output ports (5) corresponding to the plurality of radio frequency switches (4). The plurality of radio frequency output ports (5) are respectively and correspondingly connected to the plurality of waveguide ports (3), and the plurality of radio frequency switches (4) are connected to the microwave source (2). The controller (6) controls the plurality of radio frequency switches (4) so that in each time period at least one of the radio frequency output ports (5) within the plurality of radio frequency output ports (5) outputs microwaves. The plurality of waveguide ports (3) in the present microwave heating device share a microwave source (2), and controlling is performed by the plurality of radio frequency switches (4). The present device has a simple structure, and outputting microwaves by switching different radio frequency output ports (5) increases the heating uniformity of the microwave heating device.
C: Provided are a microwave heating-based thermochemical hydrogen production system, a hydrogen production method therefor and use thereof. The hydrogen production system is as follows: the inlet of a preheater (3) is in communication with a carrier gas storage device (1), and a flow controller (2) is provided therebetween; the outlet of the preheater (3) is respectively in communication with the inlet of a steam generator (13) and one end of the second-three-way valve (5) via the first-three-way valve (4); the other two ends of the second-three-way valve (5) are respectively in communication with the outlet of the superheater (14) and the inlet of a reactor (7); the reactor (7) is provided in a microwave generation device (6); the outlet of the steam generator (13) is in communication with the inlet of the superheater (14) via a pipeline; the outlet of the reactor (7), a condenser (9), a drying device (10) and a collection device (12) are successively communicated; and a chromatograph (11) is provided on a communication pipeline between the drying device (10) and the collection device (12). Microwave pyrolysis of metal oxides has the characteristics of low energy consumption and fast temperature rise, so that the cost of experiments can be reduced, the cycle of repeated experiments is reduced, and the effective energy utilization rate is greatly improved.
D: A three-dimensional printing method for food using microwaves and a printer, which relate to the technical field of foodstuffs. Microwaves are released at the front end by means of a microwave heating probe (9) embedded in the inner wall of a feeding barrel (5), and the effect of instant curing of an extruded material is achieved by combining the size settings of a non-wave absorbing material (27); by means of the design of a horn mouth (21) and a choke groove (23) of an anti-leakage unit and the design of a wave absorbing material of a printing platform (4), the heating efficiency of a product is effectively improved, and microwave leakage and diffusion are prevented. A cooling device is provided so as to ensure that a material to be printed contained in the charging barrel (5) is not cooked by microwave heating before entering the an extrusion nozzle (26). Microwaves are generated by a microwave solid-state source (8) and are conducted by a transmission line, so that microwave output is stable. In addition, power and frequency may be adjusted according to printing requirements, and the microwave solid-state source (8) is small in size and convenient to integrate. The printed product structure is high in mechanical strength by means of printing and heating curing, a hollow unsupported three-dimensional structure may be manufactured, and a product model does not easily collapse.
Answer: A