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Resistance device for electric heating effect experiments

A technology of resistance device and electrothermal effect is applied in the field of experimental equipment for teaching, which can solve the problems of prolonged experimental course time, reduced efficiency, low experimental accuracy, etc., and achieves the effects of improving teaching efficiency, reducing heat dissipation, and improving experimental accuracy.

Inactive Publication Date: 2012-04-04
宁波奇科威数字信息技术有限公司
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Problems solved by technology

This will undoubtedly lengthen the experimental course time and reduce the efficiency; and the existing method is generally low in experimental accuracy due to heat dissipation and other reasons.

Method used

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  • Resistance device for electric heating effect experiments
  • Resistance device for electric heating effect experiments
  • Resistance device for electric heating effect experiments

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Experimental program
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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] The present invention provides a resistance device for electrothermal effect experiments, which achieves the purpose of experimental teaching by embedding a general heating resistor in a heat-absorbing block with good thermal conductivity, and the heat-absorbing block can quickly absorb the heat emitted by the resistor , and according to the formula Q=cmΔt (where c is the specific heat capacity of the heat-absorbing block, m is the mass of the heat-absorbing block, and Δt is the power-on time), the heat Q can be easily determined. Therefore specifically, a kind of resistance device that is used for electrocaloric effect experiment of the present invention comprises resistance and heat-absorbing block, because resistance can adopt general heat-generating resistance, therefore not shown in figure, the structure of heat-absorbing block is as follows figur...

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Abstract

The invention discloses a resistance device for electric heating effect experiments, which comprises a resistor and a heat absorber. The heat absorber consists of a heat absorber body and an upper cover connected to the upper surface of the heat absorber, the middle of the upper surface of the heat absorber is sunken to form a holding cavity, the resistor is embedded in the holding cavity, and connecting wire grooves which run from the holding cavity to outer side surfaces of the heat absorber are respectively disposed on upper portions of two opposite side walls of the holding cavity and used for guiding connecting wires of the resistor out of the heat absorber. Compared with the prior art, the resistance device has the advantages that a temperature sensor can quickly measure temperature change, relationship between current size and generated heat can be further obtained, and teaching efficiency is improved. In addition, experiment precision is obviously improved as compared with that of a traditional experiment device.

Description

technical field [0001] The invention relates to an experimental equipment for teaching, in particular to a resistance device used in electrothermal effect experiments. Background technique [0002] Joule's law is the law that quantitatively describes the conversion of electrical energy into heat by conducting an electric current. Discovered by British physicist James Joule in 1841, its expression formula is Q=I 2 Rt, where Q is the heat generated by the conductor, I is the current passing through the conductor, R is the resistance of the conductor, and t is the time for the current to pass. Joule's law is an important formula for designing electric lighting equipment, electric heating equipment and calculating the temperature rise of various electrical equipment. It is of great significance to production, construction and scientific research. [0003] In view of this, this part of content must also become one of the key points of middle school physics teaching. As we all ...

Claims

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Application Information

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IPC IPC(8): G09B23/18
Inventor 史悠仁周玉柱陈强
Owner 宁波奇科威数字信息技术有限公司
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