Cold accumulation type energy-saving air conditioning system and operation method thereof

Abstract

The invention relates to a cold accumulation type energy-saving air conditioning system and an operation method thereof. The cold accumulation type energy-saving air conditioning system comprises a refrigerating circuit formed by serially connecting a compressor, a condenser, a refrigeration throttling element, and an evaporator through pipes, a cold accumulation box is arranged on a pipe between the condenser and the refrigeration throttling element, a cold accumulation medium and an overcooling heat exchanger are arranged in the cold accumulation box, the overcooling heat exchanger is serially connected with the refrigerating circuit, and the air conditioning system further comprises a cold accumulation circuit for providing the cold accumulation medium with cooling capacity. According to the cold accumulation type energy-saving air conditioning system and the operation method thereof, a control manner is simple and reliable, the cold accumulation box is arranged between the condenser and the refrigeration throttling element, the cold capacity is circularly stored through cold accumulation, and an overcooling degree is provided for circulation of the whole system, so that an energy efficiency ratio is increased; meanwhile, the overcooling degree is not required to be obtained by bypassing partial refrigerants, so that an air suction volume of the compressor is saved, an effective air delivery capacity of the compressor is increased, and the higher energy efficiency ratio is guaranteed.

Description

technical field [0001] The invention relates to an air-conditioning system, in particular to a cold-storage energy-saving air-conditioning system and an operating method thereof, belonging to the technical field of air conditioning. Background technique [0002] With the rapid development of the economy, insufficient power supply has become a more prominent problem. In the overall energy consumption, the energy consumption of air conditioners takes up a large part. How to reduce the energy consumption of air conditioners is of great importance to solve the current power shortage. meaning. [0003] The energy consumption of the air conditioner has a more obvious temporality. For example, when the ambient temperature rises at noon in summer, the air conditioner operates at a high load at this time, the energy efficiency ratio decreases, and the energy consumption increases significantly. obviously decrease. Therefore, rationally optimizing the power consumption of air condit...

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Problems solved by technology

In this method, the cold storage agent needs to be circulated to the end of the air conditioner to provide cooling capacity for the room, and it is necessary to increase the cost of power devices, pumps and supporting equipment. In addition, from the perspective of energy transfer, the cooling capacity needs to be transferred from the refrigerant to the cooling storage agent. The cold storage agent is then passed to the room air, and the irreversible loss increases compared with the direct evaporative cycle of the refrigerant

[0004] The existing air-conditioning cold storage method is to divide the saturated liquid from the condenser into two branches, one of which is throttled and depressurized by the expansion valve, and then exchanges heat with the refrigerant in the other branch through a heat exchanger to realize Supercooling, so as to make up for the lack of cooling capacity, but the disadvantage of this method is that because the bypass branch refrigerant used for throttling in advance performs heat exchange and cooling for the main branch refrigerant, the branch refrigerant changes from liquid to gas. Part of the gas occupies the suction volume of the compressor, which increases the actual power consumption of the compressor

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