A compressor suitable for linde-hampson throttling refrigerator

Abstract

The disclosure provides a refrigerant composition, a mixed working medium and a compressor, which relate to the technical field of refrigeration, and are physically mixed with ethylene and butane at room temperature. Component 1: ethylene, whose content is 20% by weight or less based on the weight of the composition 50 wt%; component two: butane, the content of which is 50 wt% to 80 wt% based on the weight of the composition; the component two is at least one of n-butane and isobutane. The corresponding refrigerant composition is obtained, and the boiling point temperature of the system can be lowered in the single-stage compressor, so that a lower refrigeration temperature can be achieved.

Description

technical field [0001] The disclosure relates to the technical field of refrigeration, in particular to a refrigerant composition, a mixed working medium and a compressor. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development of society and science and technology, especially in the past two years, there are more equipment with a temperature between -70°C and -86°C through two-stage cascade refrigeration, and equipment that achieves a lower temperature is relatively rare. The basic principle of two-stage cascading is to use a high-temperature stage refrigeration system, and its evaporator is used to cool the condenser of the low-temperature stage refrigeration system, so that the condensation pressure of the low-temperature stage can reach a reasonable level (1.0-1.5MPa), so as to obtain a lower cooling temperature. Each ...

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Problems solved by technology

In practice, the high-temperature stage evaporator is often above -40°C with load, and there is a temperature difference of 3-5°C during the heat exchange process, and the condensation pressure of the low-temperature stage far exceeds 1.45MPa, so the compression ratio of the compressor often It is required to reach more than 14, which is difficult for ordinary low-temperature compressors

Therefore, in the case of using a two-stage cascade system and an ordinary low-temperature compressor, it is difficult to find a refrigerant that meets the demand among the existing conventional low-temperature refrigerants

To reach this temperature range, it is necessary to use a three-stage refrigeration system, an automatic cascade refrigeration system or other methods, and the cost will increase greatly

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