Low-temperature air-cooling heat pump unit

Abstract

The invention discloses a low-temperature air-cooled heat pump unit, which relates to air-cooled heat pump units in the field of air conditioners. The existing air-cooled heat pump units generally lead to the freezing of the bottom of an air side finned heat exchanger when heating under low temperature condition in winter, which decreases heat exchange performance, increases energy consumption of the air-cooled heat pump units and even results in being unable of running normally of the air-cooled heat pump units. The air-cooled heat pump unit is characterized in that: a group of ice-melting heat exchange pipelines are added to the bottom of the air side finned heat exchanger; the upper pipeline of the ice-melting heat exchange pipelines is the major heat exchange pipeline. After the defrosting of the system, the pressurized gas under high temperature and high pressure passes through the added pipelines and flows through the ice-melting heat exchange pipelines at the bottom of the air side finned heat exchanger and releases heat to evaporate the water at the bottom of the air side finned heat exchanger to prevent the freezing of the air-cooled heat pump units, thus ensuring that the units are kept in good performance for running under low temperature working condition.

Description

technical field [0001] The invention relates to an air-cooled heat pump unit in the field of air conditioning equipment. Background technique [0002] At present, the air-cooled heat pump unit has been widely used as an integrated equipment with both cooling and heat sources due to its simple structure, small space occupation, and convenient management and maintenance. When defrosting the finned heat exchanger on the wind side, it is common to defrost: the defrosting is not complete, the condensed water is not discharged smoothly, and there is a large amount of icing at the bottom of the finned heat exchanger on the wind side, and the more icing The thicker the accumulation, the lower the heat transfer performance of the wind-side finned heat exchanger, the higher the energy consumption of the unit, and even the unit cannot operate normally due to freezing and other reasons. Contents of the invention [0003] In order to overcome the phenomenon that a large amount of icin...

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Problems solved by technology

[0002] At present, the air-cooled heat pump unit has been widely used as an integrated equipment with both cooling and heat sources due to its simple structure, small space occupation, and convenient management and maintenance. When defrosting the finned heat exchanger on the wind side, it is common to defrost: the defrosting is not complete, the condensed water is not discharged smoothly, and there is a large amount of icing at the bottom of the finned heat exchanger on the wind side, and the more icing The thicker the accumulation, the lower the heat transfer performance of the finned heat exchanger on the air side, the higher the energy consumption of the unit, and even the unit cannot operate normally due to freezing and other reasons.

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