Oil flow switch and lubrication system with the same for a refrigeration system

A lubrication system, comprising:

• a lubrication circuit that includes an oil storage device and an oil flow switch, wherein the oil flow switch comprises:
• an oil inlet that is fluidly coupled to the oil storage device;
• an oil outlet that is fluidly coupled to the oil inlet and disposed at a greater vertical height than the oil inlet;
• a float chamber fluidly coupled to the oil inlet;
• a floating liquid level switch element disposed in the float chamber;
• and
• a channel fluidly coupling the oil outlet and the float chamber and configured to allow gas to be discharged from the float chamber.

A refrigeration system, comprising:

• a lubrication circuit that includes an oil storage device and an oil flow switch, wherein the oil flow switch comprises:
• a horizontal oil inlet that is fluidly coupled to an outlet of the oil storage device;
• a vertical oil outlet that is fluidly coupled to the horizontal oil inlet;
• a float chamber having an oil flow hole that fluidly couples the horizontal oil inlet to the float chamber, and wherein the float chamber is configured fill with lubricant from the oil storage device via the oil flow hole in response to a local pressure drop caused by a change of flow direction of the lubricant between the horizontal oil inlet and the vertical oil outlet;
• a floating liquid level switch element disposed in the float chamber;
• and
• a channel fluidly coupling the oil outlet and the float chamber, wherein the channel is configured to allow gas to be discharged from the float chamber.