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在中学生物教学和课外科技活动中,常常要用到恒温箱。农村中学资金匮乏,经常停电,没有条件使用电热恒温箱。我们因陋就简,制作了一种简易恒温箱──煤油灯热水袋恒温箱,经长期使用,效果较好,兹介绍如下: 一、原理 水的比热比较大,在同样受热或冷却的情况下,其温度变化就比较慢,具有一定的恒温器效应。利用水的这一特性,设法保持产热和散热的平衡,就能人为地创造一个恒温环境。
In high school biology teaching and extracurricular science and technology activities, incubators are often used. Rural middle schools lack funds and often have power outages. There is no condition to use electric thermostats. Because of simplicity, we made a simple constant temperature box - a kerosene lamp hot water bottle incubator. After a long period of use, the effect is better. It is described as follows: First, the principle of the specific heat of water is relatively large, in the same heat or cooling, it The temperature change is relatively slow, with a certain thermostat effect. By using this characteristic of water, trying to maintain the balance between heat production and heat dissipation, we can artificially create a constant temperature environment.