Cold accumulation heat preservation box temperature control equipment utilizing eddy current technology

Abstract

The invention discloses cold accumulation heat preservation box temperature control equipment utilizing an eddy current technology. The cold accumulation heat preservation box temperature control equipment comprises a box body and an eddy current temperature control circuit board, the interior of the box body is fixedly provided with a vacuum heat insulation plate, a gas blocking layer is fixedlyarranged on the inner wall of the vacuum heat insulation plate, a core material is arranged inside the gas blocking layer, the inner wall of the core material is fixedly provided with a plurality of gas getters, the eddy current temperature control circuit board is welded on the front surface of the vacuum heat insulation plate, and a current source connecting port is integrally formed in the surface of the eddy current temperature control circuit board. According to the cold accumulation heat preservation box temperature control equipment utilizing the eddy current technology, the circuit isa self-excited oscillation type converter so as to be used to generate high-frequency current and then to generate a high-frequency alternating magnetic field; and the temperature control circuit is acompletely autonomous system which does not need external signals, and therefore, the system cost can be reduced to a great extent, meanwhile, the requirement for a phase-splitting converter is alsoreduced, moreover, the weight and the size of a direct-current inductor can be reduced, and the practicability of a cold accumulation heat preservation box is improved.

Description

technical field [0001] The invention relates to the field of cold storage insulation boxes, in particular to temperature control equipment for cold storage insulation boxes using eddy current technology. Background technique [0002] The phenomenon that electromagnetic induction occurs inside the whole conductor to generate induced current is called eddy current phenomenon. The longer the outer circumference of the conductor and the higher the frequency of the alternating magnetic field, the greater the eddy current. [0003] A coil is wound outside a conductor, and an alternating current is passed through the coil, so that the coil generates an alternating magnetic field. Since the conductor in the middle of the coil is equivalent to a closed circuit in a circle, the magnetic flux in the closed circuit is constantly changing, so an induced electromotive force and an induced current will be generated in the circumferential direction of the conductor, and the direction of th...

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Problems solved by technology

[0005] Traditional cold storage incubators mostly use polyurethane as heat insulation material, and although vacuum insulation panels with better performance and increasingly mature technology have been used in refrigerators, it seems that the use of vacuum insulation panels in cold storage incubators is currently limited. Research is still rare, and the existing cold storage incubator also has the following deficiencies:

[0009] (1) The interior of the existing cold storage and heat preservation box is provided with cold storage and heat preservation materials. Although there are many protective layers, the service life is short, the price is high, and the practicability is poor;

[0010] (2) The temperature control technology used inside the existing cold storage insulation box has a high system cost, and at the same time, the number of eddy current coils used as a whole is large, resulting in a heavy weight of the entire cold storage box, and automatic control cannot be realized

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