Ice storage air conditioner and ice storage method

Abstract

The invention relates to the field of ice storage, in particular to an ice storage air conditioner and an ice storage method. Ice making and ice stripping are performed in cycles, which can improve the energy efficiency and freezing rate of the system. It overcomes the disadvantages in the prior art that coil heat exchange is used, and the heat transfer resistance increases with the increase of the thickness of the ice layer, resulting in low energy efficiency of the system and a small freezing rate. An embodiment of the present invention provides an ice-storage air conditioner, including: an ice storage bucket and a heat exchanger, the heat exchanger is placed in the ice storage bucket, the heat exchanger includes a casing and a The internal refrigerant channel, the shell includes a heat exchange surface and a non-heat exchange surface, and the surface opposite to the bottom of the ice storage bucket is a non-heat exchange surface; when the refrigerant flows through the When the refrigerant flow channel is used, the water in contact with the heat exchange surface is cooled and frozen; when the refrigerant flows through the refrigerant flow channel in reverse, the ice in contact with the heat exchange surface is partially melted, so that the ice is under the action of buoyancy upwards off the heat transfer surface.

Description

technical field [0001] The invention relates to the field of ice storage, in particular to an ice storage air conditioner and an ice storage method. Background technique [0002] In large domestic cities, the distribution of power demand is extremely unbalanced within 24 hours a day. The peak of power consumption is generally concentrated from 8:00 am to 6:00 pm, while the low point of power consumption is concentrated from 9:00 pm to 6:00 the next day. According to this , The country has formulated a peak-valley electricity price policy, and the peak-valley electricity price difference has reached more than 4 times. Therefore, it has become a research hotspot to use the low-load low-load electricity of the power grid at night to make ice, and use the ice produced as a cold source to provide cooling to places that need cooling during the day when electricity is in short supply. . [0003] At present, in cities with large electricity consumption, air-conditioning accounts f...

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Problems solved by technology

[0004] In the above process, as the thickness of the ice layer increases, the thermal resistance of heat transfer gradually increases, which makes the evaporation temperature of the system decrease continuously, thus causing the energy efficiency of the system to be very low. The greater the thickness of the ice layer, the harder it is to freeze, making the freezing rate lower

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