Refrigeration tail end structure and refrigeration system

Abstract

The invention discloses a refrigeration tail end structure and a refrigeration system, and relates to the technical field of refrigeration equipment. The refrigeration tail end structure comprises a top exhaust pipe, an air cooler, a liquid inlet pipe and a liquid return pipe, wherein one end of the liquid inlet pipe is simultaneously in communication with the liquid inlet end of the top exhaust pipe and the liquid inlet end of the air cooler while the other end is in communication with the liquid supply end of a refrigeration unit; one end of the liquid return pipe is simultaneously in communication with the liquid outlet end of the top exhaust pipe and the liquid outlet end of the air cooler while the other end is in communication with the liquid return end of the refrigeration unit; a first electromagnetic valve is arranged at the liquid inlet end of the top exhaust pipe, a pressure regulating valve is arranged at the liquid outlet end of the top exhaust pipe, and a second electromagnetic valve is arranged at the liquid inlet end of the air cooler; and the refrigeration system comprises the refrigeration unit and the refrigeration tail end structure. According to the refrigeration tail end structure and refrigeration system, the top exhaust pipe and the air cooler are arranged in a combined mode, the flow direction of a refrigerant is controlled through the electromagnetic valve, and the refrigeration tail end structure and the refrigeration system have the advantages of being high in refrigeration efficiency, low in energy consumption, low in initial investment cost, small in perfusion amount, low in drying consumption, high in cooling speed, stable and uniform in warehouse temperature, high in automation degree and small in occupied space.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a refrigeration terminal structure and a refrigeration system. Background technique [0002] At present, cold storage usually has two types of refrigeration terminal structures, each with its own advantages and disadvantages in actual use. [0003] The first is to use the cooling fan method, connecting the cooling fan to the refrigeration unit, the refrigeration unit inputs low-temperature refrigerant to the cooling fan, the cooling fan uses a specially designed heat exchanger coil, and matches the appropriate fan to output low-temperature cold air flow to make the temperature of the cold storage Lower to achieve cooling. The air cooler has the advantages of high heat exchange efficiency, fast cooling speed, large cooling capacity, fully automatic control, easy defrosting, small amount of refrigerant injection and controllable initial investment. However, if the...

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Problems solved by technology

However, the shortcomings of the top-row tube method are very obvious. One is that the heat transfer temperature difference is large. The heat transfer temperature difference of the top-row tube method is usually 3-5K larger than that of the air cooler method, which will lead to a significant decrease in the overall energy efficiency of the refrigeration system. The slow speed will also increase the phenomenon of dry consumption of goods; the second is that defrosting is difficult and the defrosting cycle is long, and the evaporation temperature will decrease after frosting, which will lead to a decrease in energy efficiency; the third is that the initial investment is high and the filling volume is large, because The air convection velocity is close to zero, and the heat exchange area needs to be greatly increased to meet the demand for heat exchange. Therefore, the number of top row pipes is usually large, and the equipment cost is often more than three times that of the air cooler method, and the perfusion volume is even six times that of the air cooler method. about times

[0005] To sum up, in the actual application of cold storage, there are constant debates in the industry about the two refrigeration terminal structures, and it is difficult to reach a consensus. There are also certain difficulties in how to choose a reasonable choice for users. After the two refrigeration terminal structures are selected and set, each There are the above-mentioned defects, which hinder the application of refrigeration systems

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