Energy-saving ultralow-temperature preservation box

Abstract

The invention discloses an energy-saving ultralow-temperature preservation box which comprises a high-temperature refrigerating cycle unit and a low-temperature refrigerating cycle unit. The high-temperature refrigerating cycle unit and the low-temperature refrigerating cycle unit are coupled together by a heat exchanger; the high-temperature refrigerating cycle unit comprises a cycle compressor, a condenser, a first drying filter, a first capillary tube, a first automatic control valve component and a second capillary tube; and the low-temperature refrigerating cycle unit comprises a low-temperature compressor, an oil separator, a first heat regenerator, a second heat regenerator, a first drying filter,, a second drying filter, a third capillary tube, a second capillary tube, a first, automatic control valve component, a second automatic control valve component, a third automatic control valve component, a fourth automatic control valve component, a fifth automatic control valve component and an evaporator. The high-temperature refrigerating cycle and the low-temperature refrigerating cycle are coupled to realize low-temperature refrigeration, and the heat regenerating cycle form and the capillary tube energy-saving cycle form are used to improve the regenerating cycle efficiency. The energy-saving ultralow-temperature preservation box has the characteristics of high temperature decreasing speed, high regenerating efficiency, safety, reliability, energy saving and environment friendliness and can meet the regenerating requirement of the low-temperature environment of 50-90 DEG C below zero.

Description

technical field [0001] The invention relates to a refrigeration device, in particular to an energy-saving ultra-low temperature preservation box with a cascade refrigeration system structure, and the refrigeration temperature range is -50 to -90°C. Background technique [0002] With the development of economy and technology, there is more and more demand for refrigeration. For example, medicine and health, petrochemical industry, metallurgical industry, civil engineering, and gas liquefaction all require low-temperature environments, and the energy consumption required for refrigeration and the impact on the environment are also increasing. Increasingly, energy saving and environmental protection have become a part of cryogenic technology. The concept of low temperature has different temperature ranges in different environments. For example, in an air-conditioning system, when the temperature of cold water or air in the evaporator reaches 0°C, it is a low temperature; in ind...

AI Technical Summary

Problems solved by technology

The above-mentioned studies and schemes have carried out useful explorations on the cascade refrigeration cycle, especially the operating characteristics of low-temperature environmentally friendly refrigerants. The heat recovery requirements and the corresponding throttling methods and unit operation energy saving failed to come up with an effective solution

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