Industrial water-cooled water chiller

Abstract

The invention belongs to the field of water coolers, and particularly relates to an industrial water-cooled water chiller. The industrial water-cooled water chiller comprises a refrigeration cycle, acondenser water-cooled heat dissipation cycle and an evaporator cold water control cycle, and a thermostatic expansion valve in the refrigeration cycle comprises a valve shell, an ejector rod A, a diaphragm, a sealing cover, a spoiler, an ejector rod B, an adjusting tool and the like; a fixed block is mounted between an accommodating groove C for accommodating a refrigerant in the valve shell anda through groove for distribution of the refrigerant, and a circular groove A and a circular groove B for making the accommodating groove C communicate with the through groove are formed in the fixedblock; and two extendable rods always keep effective compression due to the self-locking function of the cooperation of two worms and worm wheels, so that the two extendable rods drive two pressing wheels to effectively limit the degree of freedom of the ejector rod B in the direction perpendicular to the movement direction of the ejector rod B, and the inherent frequency of the ejector rod B is increased, so that the ejector rod B is not prone to vibration on a plane perpendicular to the moving direction of the ejector rod B, and squeal is effectively avoided.

Description

technical field [0001] The invention belongs to the field of chillers, in particular to an industrial water-cooled chiller. Background technique [0002] Chillers are divided into air-cooled chillers and water-cooled chillers in the industry. Chillers are divided into low-temperature chillers and normal-temperature chillers in terms of temperature control. The normal temperature is generally controlled within the range of 0 degrees to 35 degrees. The temperature control of the cryogenic machine is generally in the range of 0 degrees to minus 45 degrees. The refrigerant circulation system of the water chiller is that the liquid refrigerant in the evaporator absorbs the heat in the water and starts to evaporate. The refrigerant releases heat through the condenser, condenses into a liquid, and becomes a low-temperature and low-pressure refrigerant after throttling through the thermal expansion valve and enters the evaporator to complete the refrigerant cycle process. [0003]...

AI Technical Summary

Problems solved by technology

[0004] The thermal expansion valve in the chiller has three types: internal balance expansion valve, external balance expansion valve and H-type expansion valve. For the commonly used H-type expansion valve, due to the two diaphragms in the initial short period of time when the chiller is just turned on, The existence of side pressure difference leads to the rapid movement of the spool and its quick reset, which makes the moving parts of the spool produce "whistling" phenomenon

At the same time, the spool that switches the valve has degrees of freedom in the three directions of X, Y, and Z during the movement process, resulting in lower natural frequencies of the moving parts of the spool, making the moving parts of the spool move in the three directions of X, Y, and Z. The direction is prone to vibration, which in turn causes the moving parts of the spool to easily resonate, resulting in the phenomenon of "howling"

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