Efficient dual injection type refrigeration system and method thereof

Abstract

The invention discloses an efficient dual injection type refrigeration system and a method thereof. The system comprises a generator, a main injector, an evaporator, a condenser, a dephlegmator used for a gas and liquid separator, a second injector adopting high-pressure liquid injection gas, a working medium pump used for liquid boosting and a throttling mechanism for throttling liquid supply to the evaporator. According to the efficient dual injection type refrigeration system and the method, the non-complete condensation manner is adopted in a single working medium or no-azeotropy mixed working medium, the area and the load of the condenser are better reduced, that is, the heat load of the generator is reduced, and therefore the heat ratio of the injection type refrigeration system is improved; and a backheating exchanger is arranged between the main injector and the condenser, so that condensation heat is further recycled, the heat loads of the generator are reduced, and the thermal performance of the injection type refrigeration system is further improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, air conditioning and heat pump, in particular to a high-efficiency double-jet refrigeration system and its method. Background technique [0002] The jet air conditioning system originally used water as the refrigerant, and this system can be traced back to the early 20th century. Although this kind of refrigeration system has simple structure, convenient installation, low maintenance cost, and stable operation, because water cannot be cooled below freezing point, and the efficiency of this kind of system is very low, the large specific volume of water vapor leads to bulky equipment; therefore, although People have continuously proposed methods to improve the water vapor injection refrigeration system, but with the appearance of compact and more efficient mechanical compression systems, the water vapor injection air conditioning system has basically withdrawn from the stage of history after ...

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Problems solved by technology

However, the condenser adopts the method of complete condensation, the condensation area of ​​the condenser is large, and the load is large. Because the heat dissipation of the condenser is large, under the same cooling capacity, the heat load of the generator will inevitably be increased, which will reduce the thermal coefficient of cooling of the system. At the same time, the volume of the heat pump increases; and the gas-liquid injector of the device uses gas to eject the liquid, the pressure difference between the two ends of the generator is not large, it is difficult for the liquid to enter the generator, and the performance of the heat pump is greatly reduced

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