A thermoacoustic refrigeration experimental demonstration device

Abstract

The invention relates to a thermo acoustic refrigeration experiment demonstration device which mainly comprises a resonance tube, wherein a plate pack is arranged in the resonance tube; two transducers are tightly clung to two sides of the plate pack respectively; temperature sensors are tightly clung to the outer sides of the transducers; one end of the resonance tube is connected with a shell; the other end of the resonance tube is connected with an acoustic capacitor; a loudspeaker is arranged in the shell; an audio monitor is arranged in the acoustic capacitor; the loudspeaker generates acoustic waves to drive air in the resonance tube to fluctuate resonantly, so that the temperature difference between the two transducers is caused, and a thermo acoustic refrigeration demonstration is completed. The device is designed with a brand new structure; through adoption of the device, the understanding of a thermo acoustic refrigeration principle for students can be relatively well deepened in macroscopic aspects; besides, the device is relatively low in noise, and very popular with the students.

Description

technical field [0001] The invention relates to the related technical field of physical and chemical teaching demonstration equipment, in particular to a thermoacoustic refrigeration experiment demonstration device. Background technique [0002] The concept of thermoacoustic refrigeration was proposed by J.C.Wheatley et al. of Los Alamos National Laboratory in the United States in the 1980s. The world's first speaker-driven thermoacoustic refrigerator was successfully developed by Hofler of the U.S. Naval Postgraduate School in 1985. [0003] Although the thermoacoustic refrigerator is still in the stage of experimental prototypes and some special occasions (such as cooling infrared sensors on space shuttles and radar electronic systems on naval ships, etc.), but because of its stability, service life, environmental protection ( With the advantages of using non-pollution fluid as the working medium) and no moving parts, as well as potential application prospects in the fiel...

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Problems solved by technology

[0013] To a certain extent, this device can assist students in the macroscopic understanding of thermoacoustic refrigeration, but its speakers are placed directly in the air, and it will make a lot of noise during the demonstration, which greatly reduces the interest of the experiment. To some extent, students resent

At the same time, the design of its energy conversion structure is not very reasonable, and it is impossible for students to directly experience the essence of thermoacoustic cooling through touch.

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