Refrigerating unit for domestic cooling device

FIELD: heating.

SUBSTANCE: refrigerating unit for domestic cooling device includes leak-tight compressor and pre-compressor, oil cooler coil, condenser, connecting tube, evaporator and network of interconnected pipelines. Cylinder lid cooler is coupled with recuperative heat exchanger installed in oil reservoir of compressor. Inner pipeline of compressor functions as delivery coil linked with compressor cylinder at the inlet point, and with pre-compressor at the outlet point. Outlet nozzle of pre-compressor is connected to cylinder cooler.

EFFECT: increase of power efficiency and service life of domestic cooling device.

1 dwg

 

The invention relates to refrigeration, and more particularly to household refrigerating appliances. Known refrigeration unit for domestic refrigeration device containing a sealed compressor, precondensation, condenser, capillary tube, evaporator, oil cooler and a system of ducts (compression Household refrigerators (Bsignal, Lnwi): Food industry, 1974 - 272 S.).

The disadvantage of this refrigeration unit is that the cooler the main influences on the oil temperature and winding engine, while the temperature of the injected steam exceeds the allowable, which allows the decomposition of halon, 15-20°C. the temperature of the details of the compressor is also high, which reduces cooling capacity by 25-40% (Jacobson V.B. have been Small refrigerating machines (Text)/ Vbecause. - M.: Food industry, 1977. - 368 S.).

The purpose of the invention is the improvement of energy efficiency and durability domestic refrigeration device.

To achieve this goal the cooler cylinder lid connected to the regenerative heat exchanger installed in an oil bath compressor, internal piping which performs the function of the injection coil is connected at the inlet to the cylinder, and the output - precondensation, output is Noah pipe which is connected to the refrigerant cylinder.

Diagram of the refrigeration unit shown in the drawing. The refrigeration unit includes a compressor 1, a regenerative heat exchanger 2, is installed in an oil bath 3, the inner pipe 4 which is connected via a tube 5 in the cylinder 6, the lid is installed, the cooler 7, coupled with precondensation 8 and regenerative heat exchanger 2. The output 9 of the recuperative heat exchanger 2 is connected to the capacitor 10, which, through capillary tube 12 is connected to the evaporator 13. From the evaporator 13 through the regenerative heat exchanger 11 through inlet pipe 14, the refrigerant enters the compressor casing 1.

We offer refrigeration unit operates as follows. Refrigerant is compressed in the cylinder 6 of the compressor 1 and is fed through the tube 5 into the inner pipe 4 recuperative heat exchanger 2, is installed in an oil bath 3. During operation of the refrigeration unit heat from compressed in the cylinder 6 gases is transferred to the refrigerant in the casing and oil, leading to deterioration in their performance properties, reducing energy efficiency and durability of refrigerant and oil by increasing their temperature levels sverhpopulyarnogo. Freon used in household refrigeration appliances, retain their properties at temperatures up to 140-160°C, oil up to 80-90°C. In operation, this temperature is s usually above: halon to 200-220°at the end of compression, oil - 100-120°C. To maintain the temperature of the refrigerant and oil in the acceptable range and reduce the temperature level of the compressor 1 as a whole on the cover of the cylinder 6 has a cooler 7, coupled with precondensation 8 and regenerative heat exchanger 2. The refrigerant in the liquid phase entering the cooler 7 and the regenerative heat exchanger 2, takes the heat from the cylinder 6, the oil bath, 3 and pumped through the inner pipe 4 a pair, performs the functions of the injection coil, refrigerant thus evaporated, and its vapors are fed through the output 9 of the recuperative heat exchanger 2 to the condenser 10, where they transform into liquid, which the capillary tube 12 is fed into the evaporator 13. In the evaporator 13, the refrigerant boils, taking heat from the products. From the evaporator 13 pairs of refrigerant received in the casing of the compressor 1. To improve the efficiency of the refrigeration cycle of the capillary tube 12 and the suction pipe 14 to form a regenerative heat exchanger 11.

In contrast to the known technical solutions for the use of regenerative heat exchanger 2, the inner pipe 4 which performs the function of the injection coil, reduces the temperature of the discharge gas 25-30°and on this basis to reduce the back pressure that increases the compressor capacity up to 20% and the reduced metal capacitor up to 10-15%.

Thus, the use of regenerative heat exchanger 2, the inner pipe 4 which performs the function of the injection coil, can further reduce the temperature at 20-25°and to bring the applied thermodynamic cycle to isothermal. Reducing energy consumption is 15-20% while increasing service life by 2 times at lower temperature level of the compressor.

Refrigeration unit for domestic refrigeration device containing a sealed compressor, precondensation, coil, cooler, condenser, capillary tube, evaporator, and a system of interconnected pipes, characterized in that the cooler lid of the cylinder is connected to the regenerative heat exchanger installed in an oil bath compressor, internal piping which performs the function of the injection coil is connected to input it with the compressor cylinder, and the output - precondensation, the outlet of which is connected to the refrigerant cylinder.



 

Same patents:

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6 dwg

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Refrigeration unit // 2262048

FIELD: cooling equipment, particularly one of absorption-diffusion type used in industrial and domestic refrigerators.

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EFFECT: increased reliability and efficiency.

2 cl, 3 dwg

Cooling turbine // 2263858

FIELD: cooling and heating equipment; devices used for cooling and heating atmospheric air fed to domestic or industrial rooms.

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EFFECT: enhanced efficiency under any climatic conditions.

4 dwg

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