Mechanical constant temperature adjusting method for experiment

Abstract

The invention discloses a mechanical constant temperature adjusting method for an experiment. The mechanical constant temperature adjusting method comprises the steps: firstly, that a blowoff valve and a regulating valve are in off states is ensured, and an expansion valve, a hot water valve and a cold water valve are turned on; the opening end of an overflow water draining hose is connected with a water draining structure; hot water of a hot water source passes through a temperature control valve to enter a water jacket; after a temperature at the position of a temperature sensing bag rises, a volume of expanded liquid expands, and a push rod can push a valve core to move upwards to reach a constant temperature position; under the constant temperature position, if the temperature at the position of the temperature sensing bag further rises, a water outlet is communicated with a cold water hole to reduce the water temperature until the valve core reaches the constant temperature position; if the temperature at the position of the temperature sensing bag further reduces, the water outlet is communicated with a hot water hole to improve the water temperature until the valve core reaches the constant temperature position; after the experiment is finished, the blowoff valve is turned on, and all the other valves are turned off. The mechanical constant temperature adjusting method disclosed by the invention utilizes the characteristic that the volume of the expanded liquid can change along with temperature change and is combined with spring force to dynamically keep the valve core at the constant temperature position to keep temperatures in the water jacket and a constant temperature box basically constant.

Description

technical field [0001] The invention relates to the technical field of chemical experiments, in particular to a constant temperature adjustment method. Background technique [0002] The constant temperature water bath is a precision instrument for direct or auxiliary heating in the fields of biology, plant, physics, chemical industry, medical treatment, environmental protection and other experimental sciences. It relies on temperature sensors, electronic control devices, etc. to realize the control of the temperature range. Constant temperature water bath system is often used in chemistry teaching and chemical research. The so-called constant temperature water bath does not mean that the water temperature is absolutely constant, but that the water temperature can be controlled within the range required by the experiment. Existing constant temperature water baths are all precision electronically controlled equipment, and the purchase cost and maintenance cost are relatively ...

AI Technical Summary

Problems solved by technology

The existing constant temperature water baths are all precision electronic control equipment, and the purchase cost and maintenance cost are relatively high, which is not conducive to popularization and application

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