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AssigneeTrane International Inc.
InventorsWilliam B. Fox, Dwayne L. Johnson, Markham G. Chatterton
Estimating the term…
To continue operating a compression refrigerant system even while the system's brazed plate heat exchanger contains, in localized areas, water at or below its atmospheric subfreezing water temperature, a penetrating temperature probe senses the water temperature at a strategic intermediate point between the heat exchanger's water inlet and outlet. The brazed plate heat exchanger comprises a series of corrugated plates stacked and brazed together to create an alternating arrangement of water and refrigerant passages in heat transfer relationship with each other. In some examples, the idea is to take advantage of the principle that water has a lower freezing temperature at relatively high pressure and that the relatively small micro-channel passages of intermediate water passages within the brazed plate heat exchanger can withstand appreciably higher pressure than other areas within the heat exchanger, such as the areas at the heat exchanger's water inlet and water outlet.
A control method involving a temperature sensor disposed within a heat exchanger that conveys a refrigerant and water, the water having an atmospheric freezing point temperature at atmospheric pressure, the control method comprising:
A control method involving a temperature sensor disposed within a heat exchanger that conveys a refrigerant and water, the heat exchanger having a water outlet, the water having an atmospheric freezing point temperature at atmospheric pressure, the control method comprising:
A control method involving a temperature sensor disposed within a heat exchanger that conveys a refrigerant and water, the heat exchanger defining a water outlet, the water having an atmospheric freezing point temperature at atmospheric pressure, the control method comprising:
Dependencies are inferred from the claim text.