Full liquid type composite type cold air units

Abstract

The invention discloses a flooded type compound cooling-air unit, which consists of a compressor, a condenser, an evaporator, a liquid connecting tube, a liquid control solenoid valve, a throttling device and an air connecting tube. Thee cooling-air unit has the technical features as follows: the evaporator is a cold flooded type evaporator; a three-way valve is arranged at the junction of the inlet pipe of the condenser and a heating tube branch. By adopting the cold flooded type evaporator, the cooling-air unit not only solves the matching problem on charging volume of natural circulating refrigerants and refrigeration circulating refrigerants, but also guarantees the effect of safe oil return and refrigerants distribution, and improves the reliability and operational performance of the cooling-air unit; by adopting the three-way valve, the cooling-air unit reduces failure rate and improves reliability. The cooling-air unit of the invention not only can be used for mobile communication base stations and service rooms as special machines of a machine room, but also can be used as cooling devices for a high-temperature refrigeratory or other heating places. The cooling-air unit of the invention is safe and reliable, efficient and energy-saving.

Description

technical field [0001] The invention relates to a liquid-filled composite air cooler unit, which is especially suitable for cooling and cooling mobile communication base stations, network or telephone server rooms, high-temperature cold storage and other high-heating spaces, and belongs to the field of refrigeration and air-conditioning equipment. Background technique [0002] In recent years, the mobile communication technology is changing with each passing day, the popularization of mobile phones continues to expand, and the number of mobile base stations as the hub of information transmission is also increasing. In addition, the application of various networks and telephone servers is also expanding, and the number of server rooms is also increasing accordingly. These mobile base stations or server rooms are generally special places with dense equipment, high heat generation, and high airtightness requirements. Cooling equipment needs to be operated throughout the year to ...

AI Technical Summary

Problems solved by technology

[0005] (1) In the dry evaporator 9, there are contradictory problems of uniform refrigerant distribution and difficult oil return

The power of natural circulation comes from the liquid level difference between the condenser 6 and the evaporator 9, so it is necessary to increase the number of tube passes of the evaporator 9 as much as possible so that the evaporator 9 can be fully utilized, but the increase in the number of tube passes leads to refrigeration operation When the flow rate of the refrigerant in each tube is reduced, the smooth oil return of the compressor 4 cannot be guaranteed.

[0006] (2) There is an optimal matching problem between the refrigerant charge of the refrigeration cycle and the natural cycle

Since the refrigerant charging amount required for natural circulation is greater than that of the refrigeration cycle, if the refrigerant charging amount is determined based on the refrigeration cycle, although the efficiency of the refrigeration cycle can be guaranteed, it will inevitably lead to liquid refrigerant in the evaporator during natural circulation. On the contrary, if the charging amount is determined based on natural circulation, a large amount of refrigerant will be stored in the condenser during the refrigeration cycle, resulting in high condensation pressure and low unit efficiency

Therefore, this problem greatly affects the efficiency and energy saving of the unit

[0007] (3) The unit still has operational reliability problems

The heat pipe solenoid valve 10 and the cooling solenoid valve 11 are adopted in the unit, and if a certain solenoid valve fails, it will inevitably lead to failure of the unit and reduce the reliability of the unit.

[0008] The problems listed above have greatly affected the safety and efficiency of the cooling equipment in the computer room, limited the energy-saving effect of the unit, and restricted the popularization and application of this type of equipment in high-heating occasions. It is urgent to break through these technical barriers. Give full play to the high-efficiency operation performance of the cooling equipment in the computer room with natural circulation of refrigerant

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