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Minitype constant temperature chiller

A freezer and constant temperature technology, applied in the field of small constant temperature freezers, can solve problems such as damage, high system cost, and thermal shock

Active Publication Date: 2007-05-16
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] U.S. Patent No. 6,094,925, a refrigeration mechanism patent for multiple sets of loads for a single refrigeration main engine, mainly uses the heat energy of the condenser of the refrigeration system to perform thermal liquid defrosting of the evaporator coil. This disadvantage is that the system cost is high , and use high-temperature refrigerant to defrost directly, the temperature of the freezing end is too high, and it is easy to cause instantaneous thermal shock and damage

Method used

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  • Minitype constant temperature chiller
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Embodiment Construction

[0050] According to the disclosed small constant temperature refrigerator of the present invention, it is applied on a load body, which is called control volume (control volume) theoretically. Firstly, it is explained by taking the box body 10 as an example. Please refer to FIG. 1, which includes a box body body 10, a secondary refrigerant (secondary coolant) circulation system 20, a constant temperature control system 30 and a frequency conversion refrigeration system 40, the inside of the box body 10 has an accommodating space 14, the outer side is an insulation layer 11, and has a door leaf 16, and the seams are used The door leaf liner 17 prevents external heat energy from entering the accommodating space 14 . The secondary refrigerant circulation system 20 includes a heat exchanger 23, a pipeline 24, a three-way valve 22, and a pump 21; the inverter refrigeration system 40 includes an inverter compressor 41, a fan 47, a condenser 42, an expansion valve 43, and an evaporati...

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Abstract

A small scale constant temperature freezer is made of frequency changing refrigerating system, second coolant circulation system, temperature compensation and defroster control mechanism, to maintain the constant temperature of the load body, the merit of the frequency changing freezer, meeting the requirement of temperature control precision of the constant temperature freezing system, solving defrosting problem, and arriving the goal of small scale constant temperature control with mutual cooperation.

Description

technical field [0001] The invention relates to a constant temperature freezer, which is applied to constant temperature boxes for freezing, process freezers, and constant temperature control instruments, especially a small constant temperature freezer with constant temperature control, frequency conversion refrigeration, and can solve the problem of defrosting. Background technique [0002] Common refrigerating devices include household refrigerators, commercial display cabinets, constant temperature and humidity chambers for experiments, low-temperature freezers, etc. At present, the fixed-frequency compressor refrigerant circulation system is mostly used for direct expansion refrigeration, and most household and commercial products use The temperature relay switches the compressor on and off to maintain the temperature within the required range, and its variation usually exceeds ±3°C. Laboratory-grade freezers operate in the always-on mode of the compressor, and then use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25D11/00F25D21/08F25D29/00
Inventor 张文瑞
Owner IND TECH RES INST
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