an adjustable coolant quick coupler has a coolant supplier seat and a transmission seat that can be optionally connected or disconnected . the coolant supplier seat has a regulator assembly . the regulator assembly is able to adjust quantity of flow - in coolant and quantity of flow - out coolant . when the coolant supplier seat is connected to the transmission seat , the coolant can flow automatically from the coolant supplier seat to the transmission seat , so as to cool down electronic components inside a rack . when the coolant supplier seat is disconnected from the transmission seat , the coolant instantly stops flowing into the transmission seat . because of the quick coupler , the rack installed inside a narrow space is convenient to set up or disassemble . furthermore , by adjusting the quantity of flow - in coolant and the quantity of flow - out coolant , the electronic components can have a better effect of heat - dissipation .