SU632717A1 - Working body - Google Patents

Description

one

The image of ognosigs for refrigeration technology concerns the working bodies of household appliances with cooling sections having different temperatures, and can be used, for example, for two-temperature household refrigerators operating on the compression principle of cooling and having an evaporator in each cooling section.

Non-azeophore working bodies are known, which are used in refrigerating machines based on the Frev3 R 114 ij.

The disadvantage of these working fluids is the impossibility of providing appropriate temperatures, which could serve as a guarantee for the long-term preservation of frozen food in refrigeration machines.

For example, certain temperature requirements are imposed on two temperature domestic refrigerators, according to which in a section with a normal degree of cooling, the temperature should be maintained within -5 ° C with controllability, and in a section with a high degree of cooling from (-18) ° C and below.

The aim of the invention is to create such azeotropic working fluids that could provide appropriate evaporation temperatures in different sections of refrigerators.

The goal is achieved by the fact that the working fluid additionally contains blinding freons from a row, K13 B1 R22, R115 with the following relative ratio of cockpto engs, weight. h:

R1I4 /, 85-0.95

or

 TR13 B10.5 -0.8

IL1 $

 4-O, 7

or

R114 / R115О, 2-О, 45

Claims (1)

In order to ensure that the average evaporation tempos and the required temperatures in the refrigerator sections reach the required suction pressure (about 1 atm) and the allowable liquefaction pressure, these non-ehropropic mixtures are poured into the cold unit of the two-temperature cooler at all .. higher concentrations. : o; ::, tse ggratdki. In each case, C1Lei of the working fluid depends on the pumping volume, solubility of both components of the mixture in engine oil, on the degree of insulation of the refrigerator sections in the range of variation of external temperatures. Example. The cooling mixture expanded in the throttling device begins to evaporate at the inlet to the aiargel of the deep-cooling section at a low temperature, depending on the evaporation pressure and on the final separation of the mixture. As heat flows in and further evaporates, the temperature of the mixture gradually rises due to a constant change in composition, as a result of which it leaves the heater with a higher temperature and does not evaporate completely. At this temperature, the mixture of wet vapors enters the evaporator section with a normal degree of cooling, where the process of temperature increase continues under the influence of further heat influx. The mixture of working fluid leaves the evaporator section with a normal degree of cooling with a somewhat lower temperature than the hectare that is in this section and is in the vapor state. Without taking into account the effect of the cooling engine oil, the vapor mixture has the same concentration as the liquid mixture before throttling. The vapor mixture is sucked off by the compressor, compressed and liquefied in a condenser, where the mixture of varying composition passes through the entire temperature interval and then with the same concentration enters the throttle device. The advantages of the proposed working fluid are that, on the basis of the simple Yx3 circulation circuit of the working fluid, a two-temperature refrigerator can work, in which the temperature reaches (-18) C in the deep cooling section and, in the section with normal cooling degree, it is possible automatic defrosting of the evaporator during the phase of stopping the compressor, and there is no need for additional energy and relatively high air humidity and low power consumption, due to the thermodynamic points of interest are the ratios of the temperature difference between the evaporators and the condenser. In addition, the small difference between the temperature in the room and in the evaporator section with a normal degree of cooling in the larger measure ensures that the evaporator is defrosting when the compressor is stopped. At the same time, the air in the refrigerator and its contents are dried to a lesser extent. Claims. The working fluid consisting of non-azotropic substances on the basis of freon 15114 for household refrigerators, is different from the fact that, with a chain of ensuring appropriate evaporation temperatures, it additionally contains the following factors from the series K13, RlSBl, R 22, K 115 in the following ratio of components, weight. h. Ria 0.85-0.95 R114 / T 13B 1 0.5-0.8 0.4-0.7 T 22 B114 /, 2-0.45 Sources of information taken into account during the examination: 1 , Copyright certificate 153866, cl. C O9 C 3 / O2, 1961.