About cryostat reaction bath, do you know how it works?

Time:

2020-09-03

Source:

www.jinghuayiqi.com

Author:

京华仪器

The low-temperature constant temperature reaction bath is also called a low-temperature constant temperature tank, a low-temperature constant temperature water tank, a low-temperature bath, a low-temperature reaction bath, a low-temperature tank, a cold trap, a low-temperature constant temperature reaction tank, a low-temperature constant temperature reaction bath, etc. The structure is rectangular, and the outer shell is made of cold-rolled steel plates with good performance. The physical properties of the refrigeration device adopt foreign advanced fluorine-free refrigeration technology, coupled with a microcomputer intelligent temperature control system, which can control temperature changes with high precision to achieve a constant temperature. Low-temperature constant temperature reaction baths are widely used in petroleum, chemical industry, electronic instrumentation, physics, chemistry, bioengineering, medicine and health, life sciences, light industrial food, physical property testing and chemical analysis and other research departments, colleges and universities, enterprise quality inspection and production departments . Provide users with a liquid environment with controlled heat and cold, uniform and constant temperature when working.

Principles and technical issues of low-temperature constant temperature reaction bath:

1. Temperature control principle of constant temperature water tank

During the use of the low-temperature thermostatic bath reaction bath, when the temperature is lower than the set value, the electronic relay will drive the heater to work, and the heating will automatically stop when the set temperature is reached. The high-power circulation pump and stirrer device inside the equipment will distribute the heat evenly and make the temperature measurement more accurate.

2. To maintain a system at a constant temperature higher than room temperature, there are roughly the following methods:

(1) Static ideal insulation between the system and the environment;

(2) Dynamic approximate insulation between the system and the environment; when the system will continuously and stably dissipate heat to the environment, the environment will also continuously and stably transfer the same amount of heat to the system through other methods;

(3) Low-temperature constant temperature reaction bath is a laboratory instrument that can provide constant temperature.

3. How to improve sensitivity during use?

(1) The better the fluidity and heat capacity of the medium used in the experiment, the higher the temperature measurement sensitivity.

(2) The smaller the heat capacity of the constant thermometer, the larger the contact surface with the constant temperature medium, the smaller the adhesion between mercury, platinum wire and capillary wall, and the higher the sensitivity.

(3) The smaller the heater power, the higher the sensitivity.

(4) The higher the power of the stirrer and the greater the stirring speed, the more uniform the temperature of each part of the medium to be constant temperature will be, and the more accurate the temperature display will be.

(5) The greater the flow rate of the low-temperature constant-temperature reaction bath circulation pump, the more uniform the temperature of the constant-temperature medium will be.

(6) The heater is placed near the stirrer to quickly transfer heat to all parts.

Real-time information

■

The practical application of high and low temperature cycling machine and common experimental equipment supporting

—

2021-07-01