Energy-storage air conditioning unit and working method thereof

Abstract

The invention provides an energy-storage air conditioning unit and a working method thereof, which can solve the shortcomings in the prior art and have the advantages of flexible installation and miniaturization. Through controlling switch combinations of different valves, the air conditioning unit can realize the switching of four operation modes such as conventional refrigeration, conventional heating, cold accumulation and energy-releasing refrigeration, ensures the reliable operation of the unit and achieves the optimum energy-saving effect. The energy-storage air conditioning unit comprises a control system, an outdoor unit, an indoor unit, an energy-storage device and a plurality of refrigerant pipelines connected among the outdoor unit, the indoor unit and the energy-storage device, wherein the refrigerant circulates in the refrigerant pipelines; the outdoor unit comprises a compressor, an outdoor heat exchanger and a throttle device; the throttle device comprises a valve member 1 and a valve member 2; the valve member 1 is formed by connecting an electronic expansion valve 1 and a check valve 1 in parallel; and the valve member 2 is formed by connecting a check valve 2, a solenoid valve 1 and an electronic expansion valve 2 in parallel.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air conditioning, and in particular relates to the system design technology of energy storage air conditioning units. Background technique [0002] Ice storage technology is a load adjustment measure with less investment and quick results, which can effectively alleviate the tension of national power supply. At present, the ice storage-related projects carried out in China are basically large-scale central air-conditioning projects, and various forms of ice storage are used. However, compared with the conventional air-conditioning system, the large-scale central air-conditioning ice storage system has huge equipment, large floor space, increased equipment quantity, and increased investment. Various cold supply and storage pipelines are complicated, difficult to control, and a large amount of construction. In the process of domestic promotion, it is subject to certain restrictions, which...

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Problems solved by technology

[0004] 1) In the cooling or heating mode, there will be an indeterminate amount of refrigerant and lubricating oil in the heat exchange coil in the energy storage barrel, which makes it difficult for the system to operate in an optimal state, affecting the system operation ;

[0005] 2) The return air access point of the ice storage mode is between the four-way valve and the indoor unit. In the heating mode, a one-way valve must be installed after the ice-making solenoid valve to prevent reverse leakage of high-temperature and high-pressure refrigerant: this structure Complicated design, poor reliability, and increased system flow resistance in ice storage mode;

[0006] 3) Various valves are integrated into independent components, which is inconvenient for production and transportation, and even more inconvenient for control and product certification;

[0007] 4) A large number of solenoid valves are required to achieve various mode conversions, and because the existing solenoid valves usually have reverse leakage problems after they are closed, a check valve must be used in series with the solenoid valve to prevent refrigerant from flowing Reverse leakage at the closed solenoid valve affects the stable operation of the system

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