Liquid cooling cooling-water machine provided with adjustable supercooler unit

Abstract

The invention discloses a liquid cooling cooling-water machine provided with an adjustable supercooler unit. The heat exchange temperature adjustable supercooler unit is connected between a condenserand a throttling element in the cooling-water machine in series. The supercooler unit comprises a motor, a driving screw rod, a driven screw rod and a supercooler. The supercooler comprises a top cover, a cooling pipe, a corrugated pipe, springs, limiting sleeves, spacer sheets, a supporting sleeve and a liquid trap which form multiple series-connected cavities. By changing the internal volumes ofthe multiple cavities, the internal heat exchange area and internal temperature of the supercooler are adjusted, so that the supercooling capacity of a coolant at an inlet of the throttling element is controlled dynamically, the specific volume of the volume occupied by flash gas in the throttling element is controlled, the cooling capacity is increased, and the energy efficiency of the cooling-water machine is improved. In addition, the supercooler can conduct effective superheating on the coolant at an outlet of an evaporator, so that part of residual liquid at the outlet of the evaporatoris further evaporated through superheating, the phenomenon of gas suction liquid carrying of a compressor is effectively inhibited, and normal operation of the compressor is ensured.

Description

technical field [0001] The invention relates to a water chiller, in particular to a water chiller equipped with a subcooler with adjustable heat exchange temperature. Background technique [0002] Chiller technology is a strong driving force for the development of the HVAC industry, especially suitable for liquid cooling in household life, control products, machinery manufacturing and other fields. In recent years, with the development of new energy vehicles, high-end manufacturing, and precision processing industries, consumers have put forward higher demands for the quantity and quality of chiller equipment, and the development of high-quality chillers is of great significance. [0003] Good refrigeration control effect, energy saving and environmental protection are important indicators for evaluating the quality of chillers. A subcooler is added to the cooling system, and the saturated liquid condensed by the condenser is recooled through the subcooler to make its tempe...

AI Technical Summary

Problems solved by technology

[0004] (1) By installing an expansion valve, the refrigerant flow rate is dynamically controlled (for example, refer to patent 200910055542.8). When the liquid pressure drop at both ends of the valve inlet and outlet is within a predetermined range, the intelligent adjustment controller control mechanism drives the throttle body to move , to adjust the liquid flow through the throttle body, and the flow control of the throttle body introduces a flow control model to establish an intelligent control method, so that the throttle valve can control the refrigerant flexibly and with high precision, which can greatly improve the cold water The energy efficiency of the unit, but the refrigerant is easy to flash in the expansion valve

(2) The condenser and the subcooler are integrated (for example, refer to patent 201210503294.0) to isolate the condenser and the subcooler through a deflector, and the deflector is used to guide the refrigerant condensed by the condenser It flows into the diversion groove of the subcooler to further cool the refrigerant. The condenser and the subcooler are integrated to make the whole structure more compact and the chiller takes up less space; (3) Between the condenser and the evaporator Set up a high-pressure float valve and a low-pressure liquid collector (for example, refer to patent 201310246753.6). The incompletely evaporated refrigerant liquid from the evaporator is placed at the bottom of the low-pressure liquid collector due to gravity. The high-pressure refrigerant performs heat exchange to increase the subcooling degree of the refrigerant liquid, but the structure is complex and many components are added; (4) Set up a liquid collector, multiple heat exchangers and reversing valves (for example, refer to patent 201410319270.9), through The switching of the reversing valve changes the direction of the liquid path, allowing the multiphase refrigerant to exchange heat in the liquid collector, thereby increasing the subcooling degree of the refrigerant, but adding more components and high cost; (5) Additional cooling circuits and subcooling (For example, refer to patent 201821386425.0), by adding a water supply line between the water outlet and water inlet of the refrigerant water pump, it is introduced into the subcooler, and a solenoid valve is installed on the refrigerant water supply line to control the flow of refrigerant water , so as to control the temperature of the inverter and reduce the temperature of the condensate outlet

[0005] These methods are all helpful to further reduce the temperature of the refrigerant at the outlet of the condenser and increase the degree of subcooling, but there are some shortcomings as follows: (1) The internal heat exchange area of ​​the subcooler is fixed, and the heat exchange amount is fixed and cannot be adjusted. The subcooler cannot dynamically control the subcooling amount of the refrigerant. According to the different working conditions of the chiller, the subcooling degree of the liquid cooling system cannot be adaptively controlled, and the cooling effect and energy saving effect are not good.

[0006] (2) The cooling pipes and refrigerant pipes in the subcooler are mostly arranged in parallel, and the heat exchange area of ​​the cold and hot pipes is small. Under the same volume, the cooling path of the cooling pipes is small, the cooling capacity is limited, and the cooling effect is not good

[0007] (3) The compressor in the flooded water chiller is easy to inhale and carry liquid, which will easily cause the compressor to run out of oil and cause damage to the compressor, and the life of the compressor will be reduced

In order to prevent the compressor from carrying liquid in the current flooded chiller, the evaporator cylinder is made very large, and the position of the heat exchange tube is very low, resulting in an increase in the cost of the heat exchanger

Images