| 摘要 |
An integrated controls assembly for controlling fluid flow between first and second heat exchangers and a compressor in a heat pump, air conditioner, or like system. The integrated controls assembly includes an accumulator in the form of a tank communicating by conduits with the discharge outlet and the suction inlet of the compressor. The conduit leading from the discharge outlet includes a coiled section contained within the accumulator and leading to a reversing valve assembly, also contained within the accumulator. The reversing valve selectively directs the gas flow from the discharge outlet to one or the other of a pair of conduits leading to the heat exchangers and simultaneously directs the flow from the other heat exchanger to the interior of the accumulator and therefrom to the suction inlet of the compressor. Shifting of the reversing valve will reverse the flow of refrigerant through the heat exchangers. A bypass valve located at the reversing valve is provided to divert flow from the compressor to the interior of the accumulator in response to a drop in temperature inside the accumulator when refrigerant is flowing to the first heat exchanger from the compressor, and the second heat exchanger, thereby providing a higher evaporating temperature in the second heat exchanger to effectuate the removal of accumulated frost therefrom. A combination oil aspirator/gas check valve leads from the accumulator to the suction inlet of the compressor to provide positive oil return to the compressor at all flow rates of returning suction gas. |
