Water-cooled cooling-water machine

Abstract

The invention belongs to the field of cooling-water machines, and particularly relates to a water-cooled cooling-water machine. The water-cooled cooling-water machine comprises a refrigeration cycle,a condenser water-cooled heat dissipation cycle and an evaporator cold water control cycle, an expansion valve in the refrigeration cycle comprises a valve shell, an ejector rod A, a diaphragm, a sealing cover, an ejector rod B and the like, and a fixed block A is mounted between an accommodating groove C used for accommodating a refrigerant in the valve shell and a through groove for distributionthe refrigerant. In the initial starting time period of the cooling-water machine, the pressure change of the refrigerant in the containing groove C15 is small, and therefore the moving speed generated when the diaphragm drives the ejector rod A, the ejector rod B and other moving parts is low due to the fact that the pressure difference is generated between the two sides of the diaphragm; and the vibration frequency of the ejector rod A and the ejector rod B in the initial starting time period of the water cooling machine is reduced, so that the ejector rod A and the ejector rod B do not generate a howling phenomenon caused by rapid movement and resetting in a short time.

Description

technical field [0001] The invention belongs to the field of chillers, in particular to a water-cooled chiller. Background technique [0002] Chillers are commonly known as freezers, refrigerators, ice water machines, chillers, cooling machines, etc., because they are widely used in various industries, so there are countless names. [0003] In the refrigerant circulation system of the water chiller, the liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. The refrigerant absorbs the heat from the water, and the liquid refrigerant also completely evaporates into a gaseous state and then is sucked into and compressed by the compressor. Gas-state refrigeration 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. [0004] There are three...

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Problems solved by technology

[0006] In addition, the switch of the valve is realized by the movement of the spool in the Z-axis direction, but in fact the spool has degrees of freedom in the three directions of X, Y, and Z, so that the spool has a lower natural frequency, thus The valve core is prone to vibration in the three directions of X, Y, and Z, and it is more likely to cause the phenomenon of "howling"

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