Hot-gas defrosting system

Abstract

The invention discloses a hot-gas defrosting system which comprises a hot-gas pipeline, an evaporation device, a draining device, an intermediate pressure vessel and a low-pressure circulating barrel. High-temperature gas is led through the hot-gas pipeline, the evaporation device is connected with the hot-gas pipeline, the draining device is connected with the evaporation device, the intermediate pressure vessel is connected to the draining device through a pipeline, the low-pressure circulating barrel is connected to the intermediate pressure vessel through a pipeline, the high-temperature gas is transmitted into the evaporation device by the hot-gas pipeline, so that frosting on the evaporation device is melted, the high-temperature gas is changed into liquid after heat is exchanged, and the liquid is discharged into the intermediate pressure vessel through the draining device and transmitted into the low-pressure circulating barrel through the intermediate pressure vessel. According to the hot-gas defrosting system, the liquid is discharged into the intermediate pressure vessel, defrosting effects are good, the system avoids a fact that liquid is potentially exploded from a low-pressure gas returning pipe as the liquid in the evaporation device is discharged into the low-pressure circulating barrel through the low-pressure gas returning pipe, and operating safety of the system is ensured.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a hot gas defrosting system. Background technique [0002] Hot gas defrosting is a method of using hot gas to melt the frost layer on the evaporator. The specific use process is: first interrupt the liquid supply of the evaporator and close the return air port of the evaporator coil, and then provide high-pressure gas to use the inside of the evaporator coil. The high pressure and high-pressure gas melt the frost layer on the surface of the evaporating coil. [0003] At present, the refrigeration system in the cold chain logistics cold storage adopts the hot gas defrosting method is the most common, because in addition to being economical, practical and energy-saving, the hot gas defrosting method can be recycled because the hot gas is a by-product of system operation. [0004] However, in the way of hot gas defrosting, since there is still some refrigerant liquid in the e...

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Problems solved by technology

[0006] The embodiment of the invention discloses a hot gas defrosting system to solve the problem of poor defrosting effect of the current hot gas defrosting system and the liquid explosion easily caused by directly discharging the liquid in the evaporator into the low-pressure return air pipe and the low-pressure circulation barrel and the problem of greater energy consumption

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