A refrigerator refrigeration cycle system

Abstract

The invention provides a refrigeration cycle system for a freezer, including a compressor, a condenser, an evaporator, and a capillary tube. Inlet and outlet of high-pressure refrigerant and inlet and outlet of low-pressure refrigerant. The supercooled liquid receiver is equipped with inlet and outlet of supercooled refrigerant liquid, inlet and outlet of two-phase refrigerant, and outlet of saturated refrigerant vapor; the outlet of the condenser is connected to the high pressure of the regenerator. The refrigerant inlet and the high-pressure refrigerant outlet are connected to the supercooled liquid receiver. There is a supercooled refrigerant liquid inlet, and the high-pressure refrigerant outlet is connected to the evaporator inlet through a capillary tube; the evaporator outlet is connected to the two-phase refrigerant inlet, and the saturated refrigerant vapor outlet is connected The low-pressure refrigerant inlet and the low-pressure refrigerant outlet are connected to the compressor. The invention can ensure that the evaporator performs two-phase heat exchange in the whole evaporation process, significantly increases the heat transfer coefficient of the evaporator, and improves the heat exchange effect.

Description

technical field [0001] The invention relates to a novel refrigerator refrigeration cycle system. Background technique [0002] The general freezer circulation system is usually mainly composed of compressor, evaporator, condenser and capillary tube. In its plate-tube evaporator, as the refrigerant flows, the refrigerant evaporates continuously, the dryness increases, the wetting circumference of the refrigerant decreases, and the two-phase refrigerant gradually evaporates into saturated or superheated steam. The phase change heat of the refrigerant in the tube gradually becomes the sensible heat heat transfer of the gas, so the heat transfer coefficient of the evaporator will gradually decrease, and its heat transfer capacity will gradually weaken. [0003] There are two main improvement technologies at present: one is to increase the heat exchange area of ​​the condenser to fully ensure the supercooling degree of the condenser outlet, so that the capillary inlet is all sup...

AI Technical Summary

Problems solved by technology

[0003] There are two main improvement technologies at present: one is to increase the heat exchange area of ​​the condenser to fully ensure the supercooling degree of the condenser outlet, so that the capillary inlet is all supercooled refrigerant liquid, and the evaporator inlet is throttled through the capillary. The end dryness is reduced, and the liquid filling rate of the evaporator is increased; however, the area of ​​the condenser is increased too much in this way, which increases the difficulty of the process and increases the cost, which reduces the competitiveness of the product

The second is to increase the filling volume of the refrigeration system, which can increase the circulation flow of the system to a certain extent and increase the liquid filling rate in the evaporator, but it is easy to cause the temperature of the return air pipe to be too low, which will have a negative impact on the service life of the compressor

Images