A method to improve the accuracy of a large-capacity cryogenic constant temperature bath

Large-capacity low temperature constant temperature bath is widely used in petroleum, chemical, electronic instrumentation, physics, chemistry, biological engineering, medicine and health, life sciences, light industry food, physical testing and chemical analysis and other research departments, colleges and universities, enterprise quality inspection and production departments, for users to work to provide a hot and cold controlled, uniform and constant temperature field source, test samples or products for constant temperature test or test, can also be used as direct heating or refrigeration and auxiliary heating or refrigeration of heat source or cold source
.

The large-capacity cryogenic constant temperature bath is a high-precision constant temperature source with its own refrigeration and heating, which can be used
as a constant temperature source for constant temperature experiments in the machine tank, or connected to other equipment through hoses.

A field source with uniform and constant temperature, a constant temperature test or test on a test sample or a product produced, and can also be used as a heat or cold source for direct heating or refrigeration and auxiliary heating or cooling
.

As one of the important components of the cryogenic constant temperature bath, the working principle of the compressor is mainly based on the relationship between pressure volume and temperature in physics, when the mass of the gas is fixed, the product of pressure and volume is a constant
.

Therefore, to double the pressure of a gas per unit mass, it is necessary to reduce its volume by half
.

All cryogenic bath compressors are gas compressed according to this principle
.

Methods to improve accuracy: 1, the temperature of the water in the tank should not be too different from the room temperature, so as to reduce the heat dissipation rate of the environment; The heating voltage should also not be too small and too large
.

2, heater: the smaller the heating power, the higher the
temperature control accuracy.

3, the position of the components: the heater is placed near the agitator, so that the heat is quickly transferred to each part
.

4, temperature medium: medium fluidity is good, large heat capacity, then the temperature control accuracy is high
.

5, mixer: the mixing speed must be large enough, so that the temperature of each part of the constant temperature medium can be as consistent
as possible.

6, thermometer: its heat capacity is small, the contact surface with the constant temperature medium is large, the adhesion between mercury and platinum wire and capillary wall is small, and the temperature control accuracy is high
.