An air conditioning unit with cold storage function and its control method

Abstract

The invention discloses an air-conditioning unit with cold storage function and its control method. The air-conditioning unit includes a compression mechanism, a condensation mechanism and a buffer mechanism connected in sequence, and also includes a control device, a gas-liquid separator, a first electromagnetic valve, a second Two electromagnetic valves, a mechanical refrigeration mechanism, a cold storage mechanism and a centrifugal fan. The buffer mechanism is connected to the mechanical refrigeration mechanism through the first electromagnetic valve and connected to the cold storage mechanism through the second electromagnetic valve. The liquid separator is connected with the compression mechanism; the mechanical refrigeration mechanism includes a first heat exchanger, and the first heat exchanger is arranged on the air outlet side of the centrifugal fan; the compressor, the first electromagnetic valve, the second electromagnetic valve, the mechanical The refrigeration mechanism, the cold storage mechanism and the centrifugal fan are respectively electrically connected to the control device; the air conditioning unit provided by the present invention can realize mechanical refrigeration and cold storage by using one refrigeration medium, which saves the replacement of intermediate plates and improves the refrigeration efficiency during cold storage.

Description

technical field [0001] The invention relates to the technical field of air-conditioning units, in particular to an air-conditioning unit with cold storage function and a control method thereof. Background technique [0002] Existing air-conditioning units generally do not have the function of cold storage, but directly use evaporative cooling to cool the air. The function of the air-conditioning unit is single and the applicability is low; some existing air-conditioning units have both mechanical refrigeration and cold storage functions. Generally, there are at least two independent circulation systems, and there are many intermediate plate exchange links, resulting in a large loss of heat exchange efficiency; and the complexity of the pipeline design leads to a significant increase in production costs. [0003] In addition, currently on the market, there is still no air-conditioning unit that can perform mechanical refrigeration and cooling at the same time. [0004] It ca...

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Problems solved by technology

[0002] Existing air-conditioning units generally do not have the function of cold storage, but directly use evaporative cooling to cool the air. The function of the air-conditioning unit is single and the applicability is low; some existing air-conditioning units have both mechanical refrigeration and cold storage functions. Generally, there are at least two independent circulation systems, and there are many links in the middle plate exchange, resulting in a large loss of heat exchange efficiency; and the complicated design of the pipeline leads to a great increase in production costs

[0003] In addition, currently on the market, there is still no air-conditioning unit that can perform mechanical refrigeration and cooling at the same time

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