Rapid freezing-defreezing circulator

A circulator, fast technology, applied in the field of circulator, can solve the problems of damage, environmental pollution, long freeze-thaw cycle, etc.

Inactive Publication Date: 2007-08-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of a single medium is that there is always a link in each cycle with low heat exchange efficiency: the freezing-thawing method in the air medium has low thawing efficiency and a long freezing-thawing cycle; a single use of water medium, although there is no environmental pollution problem, but The water medium releases a lot of heat during the freezing process and absorbs a lot of heat during the thawing process, so the efficiency is also low; the single use of oil medium, one is low efficiency, which is the same as the previous two cases, and the other is oil The medium is fluorescent, so it is not suitable for sample processing that needs to detect the fluorescence spectrum; there are two problems with antifreeze, one is the low efficiency, in the past, the antifreeze was completely placed in the sample cham

Method used

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  • Rapid freezing-defreezing circulator

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: Fragmentation experiment on rock samples to reproduce the geological process of physical weathering in nature.

[0023] The sample size is assumed to be 2 kg.

[0024] According to the climatic conditions on the earth's surface, the lowest temperature is -30℃ and the highest temperature is 40℃ when simulating cold zone; the lowest temperature is -10℃ and the highest temperature is 50℃ when simulating temperate zone. The freezing cycle is 10 hours, and the heating cycle is 2 hours. The water medium filling cycle into the freezing thermostat is 8 minutes, and the pumping cycle from the freezing thermostat is 2 minutes. Complete the freeze-thaw cycle twice a day.

Example Embodiment

[0025] Example 2: Technology to increase the content of digestible starch in sweet potato starch.

[0026] Weigh a certain amount of experimental starch, disperse it in water, prepare 500 ml of starch milk with a certain concentration, adjust the pH to neutral, stir for 30 minutes at a speed of 130 revolutions per minute in a water bath at 100°C, and take it out after the gelatinization is complete , Cool to room temperature under normal pressure, and then put it in a refrigerator at 4°C for aging for a certain period of time, and then perform repeated freezing-thawing treatments in the fully automatic freezing-thawing device of the present invention. The aged starch glue is vacuum dried and crushed , Which is anti-digestive starch.

[0027] Freeze-thaw cycle settings: the lowest temperature is -20℃, the highest temperature is 60℃; the freezing cycle is 5 hours, the heating cycle is 1 hour; the water medium is poured into the freezing thermostat for 8 minutes, and the self-freezin...

Example Embodiment

[0028] Example 3: The effect of freeze-thaw cycles on the denaturation of animal protein.

[0029] Put 500 grams of animals (such as fish) in a freeze-thaw circulator, set the lowest temperature to -20°C and the highest temperature to 10°C; the freezing cycle is 18 hours, and the thawing cycle is 6 hours; the water medium is kept at a constant temperature for freezing The perfusion cycle of the device is 10 minutes, and the drain cycle of the self-refrigeration thermostat controller is 4 minutes. Complete the freeze-thaw cycle once a day.

[0030] As the number of freeze-thaw cycles increases, animal protein is denatured. Therefore, repeated freeze-thaw cycles should be avoided during processing to ensure the quality of animal food.

[0031] Other application fields of the present invention include: (1) In geochronology research, samples are broken through cycles of freezing and thawing to improve the purity of clay minerals. (2) In the chemical industry, the PVA / bentonite hybrid ...

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PUM

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Abstract

The invention relates to a circulator for freezing and defreezing the material, comprising an automatic controller (01), a heating thermostat (02), and a freezing thermostat (03). The material container (25) is in the freezing thermostat (03) and periodically alternates the freezing and defreezing processes. The heating thermostat (02) heats the water medium and controls the temperature constantly. The automatic controller (01) controls the periods of freezing and defreezing, controls the circulation period of water, and the water level in the heating thermostat (02) and freezing thermostat (03). The invention can freeze material in air, defreeze material in circulated water medium, and alternatively process the freezing and defreezing, while the periods can be set. The invention has high efficiency and wide application.

Description

technical field [0001] The invention relates to a circulator for freezing and thawing materials. Background technique [0002] In the prior art, the freezing-thawing of materials generally adopts the method of heat exchange in various media such as air, water, oil or antifreeze, such as the heating and refrigeration circulator produced by a German company, the common The characteristics are all using a single medium. The disadvantage of a single medium is that there is always a link in each cycle with low heat exchange efficiency: the freezing-thawing method in the air medium has low thawing efficiency and a long freezing-thawing cycle; a single use of water medium, although there is no environmental pollution problem, but The water medium releases a lot of heat during the freezing process and absorbs a lot of heat during the thawing process, so the efficiency is also low; the single use of oil medium, one is low efficiency, which is the same as the previous two cases, and ...

Claims

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Application Information

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IPC IPC(8): F25D31/00F25D29/00
Inventor 王龙樟王立云
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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