High-efficiency low-temperature absorptive refrigerating machine

Abstract

The invention discloses a high efficient low temperature absorption refrigerating machine, which is a signal grade ammonia absorption refrigeration machine with low refrigeration temperature by utilizing strong solution to recover rectify heat, absorption heat and calorific potential. A medium and low temperature generator is arranged between a high temperature generator and a dephlegmator, which is able to recover the generating heat by utilizing a first solution heat exchanger and a second solution heat exchanger; a medium temperature absorber is positioned between a solution throttle valve and the low temperature generator, which recovers the rectify heat by utilizing the heat exchanger in the dephlegmator and recovers the absorption heat by utilizing the heat exchanger arranged in the medium temperature absorber as well as stores the potential by utilizing an ammonia liquid storage tank and a solution storage tank. By applying simple and reliable calorific potential system, the invention is able to effectively utilize the regenerative energy and the valley electricity and to achieve the refrigeration temperature as 30 DEG C. under zero, and has the advantages of high efficiency, saving energy and steady performance, etc.; therefore, the invention is particularly suitable for occasions needing low refrigeration temperature for freezing or chilling food.

Description

technical field [0001] The invention relates to a refrigerator, in particular to a high-efficiency low-temperature absorption refrigerator. Background technique [0002] With the development of social economy and production and processing technology, refrigerators for refrigeration are more and more widely used in food processing, pharmaceutical, biological and chemical industries. The low-temperature environment required by the existing refrigeration technology is mainly obtained by electrically driving the vapor compression refrigerator, so the waste heat or waste heat generated in the production process cannot be utilized. In particular, with the depletion of fossil energy and the deteriorating global environment, the use of CFC, HCFC, and HFC working fluid vapor compression refrigerators has been increasingly restricted, while absorption refrigeration using lithium bromide solution or ammonia water as working fluid machine has received more attention. Absorption refrig...

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Problems solved by technology

It is also difficult for the existing absorption refrigerators to recover the heat of rectification and absorption at lower refrigeration temperatures, and their energy-saving effect is poor, and their work efficiency is low, which greatly limits their popularization and use

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