Patent ID: 9395125
Filing Date: 2016-07-19
CPC Classification: F25B,F28D,F28F

Claim Text:
1. A brazed plate heat exchanger for an air conditioner system or a heat pump system defining a water inlet, a water outlet, a refrigerant inlet, and a refrigerant outlet, wherein in use, a current of water flows from the water inlet to the water outlet and a refrigerant is conveyed from the refrigerant inlet to the refrigerant outlet, the refrigerant being in a heat transfer relationship with the current of water; the brazed plate heat exchanger comprising: a plurality of corrugated plates being stacked to define a plurality of refrigerant passages that place the refrigerant inlet in fluid communication with the refrigerant outlet, the plurality of corrugated plates being stacked to further define a plurality of upstream water passages, a plurality of downstream water passages, and a plurality of intermediate water passages; with respect to water flow, the plurality of upstream water passages are downstream of the water inlet, the plurality of intermediate water passages are downstream of the plurality of upstream water passages, the plurality of downstream water passages are downstream of the plurality of intermediate water passages, and the water outlet is downstream of the plurality of downstream water passages; when in use, the current of water at the water inlet is warmer than the current of water at the water outlet, and the current of water at the water outlet is warmer than at least some of the current of water flowing through the plurality of intermediate water passages; a probe comprising a temperature sensor and a pair of wires connected to the temperature sensor, the temperature sensor being at a tip of the probe, the temperature sensor extending into at least one intermediate water passage of the plurality of intermediate water passages; and a target point within the plurality of intermediate water passages, the temperature sensor being positioned at the target point; and such that when in use, the water at the target point is colder at the target point than at the water inlet, at the plurality of upstream water passages, at the plurality of downstream water passages, and at the water outlet, and the target point has a lower flow rate of water than the water inlet, the plurality of upstream water passages, the plurality of downstream passages, and the water outlet.