Compound refrigeration device and method based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches

A composite refrigeration and thermoelectric refrigeration technology, applied in refrigeration and liquefaction, the operation mode of refrigerators and machines, etc., can solve the problems of low operating frequency of magnetic refrigeration devices and systems, design limitations of fluid circulation loops, and inability to transfer or absorb fluids. , to achieve the effect of improving heat exchange efficiency and heat transfer capacity, improving device performance and reliability, and improving device cooling performance

Active Publication Date: 2020-05-19
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of convective heat transfer, the fluid cannot transfer or absorb the heat generated by the magnetic card effect in a short period of time, so that the magnetic refrigeration device and system have technical problems such as low operating frequency and large heat loss.
At the same time, the complexity of fluid circulation circuit design also limits the application of magnetic card refrigeration in miniaturized equipment

Method used

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  • Compound refrigeration device and method based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches
  • Compound refrigeration device and method based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches
  • Compound refrigeration device and method based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches

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Embodiment 1

[0027] See Figure 1 to Figure 3 The embodiment of the present invention provides a thermoelectric refrigeration and magnetic card refrigeration composite refrigeration device based on a thermal switch. The hot end, both the cold end and the hot end have thermal switches for conducting or blocking thermal insulation; the composite refrigeration device further includes a pulse power supply 8 for applying periodic current to the thermoelectric / magnetic card composite refrigeration structure 1 As well as a magnet system that performs periodic magnetization or demagnetization, the pulse power supply 8 and the magnet system cooperate with the thermal switch to control the cold end of the thermoelectric / magnetic card composite refrigeration structure 1 for continuous cooling. Preferably, the thermoelectric / magnetic card composite refrigeration structure 1 includes a plurality of p-type thermo-electromagnetic compound refrigeration arms 11 and a plurality of n-type thermo-electromagne...

Embodiment 2

[0036] The embodiment of the present invention provides a composite refrigeration method of thermoelectric refrigeration and magnetic card refrigeration based on a thermal switch. In the magnet system, a transmission mechanism controls the movement of a pair of S-pole permanent magnets 6 and N-pole permanent magnets 7 to realize periodic magnetization and demagnetization. , Regulate the pulse power supply 8 to match the periodic application of current, and match the on and off of the thermal switch to create a new type of refrigeration cycle process: magnetization, equal magnetic field, demagnetization, zero magnetic field. The specific steps are:

[0037] S1, when the magnetic field is applied rapidly, due to the magnetic card effect, the p-type thermo-electromagnetic composite refrigeration arm 11, the n-type thermo-electromagnetic composite refrigeration arm 12 and the magnetic card working fluid bed 13 all heat up rapidly, rising from the initial temperature to a certain value...

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Abstract

The invention relates to the technical field of refrigeration, and provides a compound refrigeration device based on thermoelectric refrigeration and magnetocaloric refrigeration of thermal switches.The compound refrigeration device comprises a thermoelectric / magnetocaloric compound refrigeration structure, wherein the opposite sides of the thermoelectric / magnetocaloric compound refrigeration structure are taken as the cold end and the hot end respectively, and the cold end and the hot end are both provided with the thermal switches used for conducting or blocking heat. The compound refrigeration device furthermore comprises a pulsed power source for applying periodic current to the thermoelectric / magnetocaloric compound refrigeration structure and a magnet system for conducting periodicmagnetizing or demagnetizing, and the pulsed power source and the magnet system cooperate with the thermal switches to control the cold end of the thermoelectric / magnetocaloric compound refrigerationstructure to carry out continuous refrigeration. The invention furthermore provides a compound refrigeration method based on thermoelectric refrigeration and magnetocaloric refrigeration of the thermal switches. The compound refrigeration method comprises the four steps of S1, S2, S3 and S4. By means of the compound refrigeration device and method, high-efficiency double compound refrigeration ofthermoelectric / magnetocaloric compound refrigeration and magnetocaloric refrigeration is achieved, and the refrigeration performance of the device can be greatly improved.

Description

Technical field [0001] The invention relates to the technical field of refrigeration, in particular to a composite refrigeration device and method based on thermoelectric refrigeration and magnetic card refrigeration based on a thermal switch. Background technique [0002] Thermoelectric refrigeration, also known as semiconductor refrigeration or thermoelectric refrigeration, is a refrigeration technology based on the Peltier effect. The basic principle of the Peltier effect is that the carriers in the semiconductor material migrate from the cooling end to the heating end under the action of an external electric field. The heat is brought from the cooling end to the heating end to achieve cooling. Thermoelectric refrigeration technology has the advantages of simple structure, strong flexibility, easy integration and no pollution. Therefore, thermoelectric refrigeration is one of the hot research directions in the field of new refrigeration technology. However, thermoelectric re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B21/00F25B21/02
CPCF25B21/00F25B21/02Y02B30/00
Inventor 孙志刚刘国强何雄何斌张孔斌柯亚娇赵文俞
Owner WUHAN UNIV OF TECH
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