A heat cycle system is a heat cycle system (1) using a working medium containing hydrofluoroolefin (HFO) that has a double bond in a molecule structure, the heat cycle system (1) having a compressor (10), a high-pressure side heat exchanger (12), a low-pressure side heat exchanger (14), an expansion mechanism (13), and an acid detection means (40) which is disposed in a discharge pipe (21) connecting the compressor (10) and the high-pressure side heat exchanger (12) and which detects acid generated by decomposition of the working medium in a heat cycle.

The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback.

The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback.

The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback.

An inline acid detection apparatus for inhibition in an HVAC system including at least one line adapter, at least one passage adapter, and an inhibitor. The at least one line adapter is configured to mate with a refrigerant line on the HVAC system. The at least one passage adapter configured to couple to the second-diameter of the at least one line adapter. The at least one passage adapter allowing a process fluid to flow therethrough. The inhibitor is configured to stop the process fluid from passing through the inline acid detection apparatus. The inhibitor is actuated by a trigger mechanism. The trigger mechanism is configured to be actuated by an acid. The inline acid detection apparatus will shut down the HVAC system when the process fluid includes a threshold of the acid such that the trigger mechanism actuates the inhibitor.

An inline acid detection apparatus for inhibition in an HVAC system including at least one line adapter, at least one passage adapter, and an inhibitor. The at least one line adapter is configured to mate with a refrigerant line on the HVAC system. The at least one passage adapter configured to couple to the second-diameter of the at least one line adapter. The at least one passage adapter allowing a process fluid to flow therethrough. The inhibitor is configured to stop the process fluid from passing through the inline acid detection apparatus. The inhibitor is actuated by a trigger mechanism. The trigger mechanism is configured to be actuated by an acid. The inline acid detection apparatus will shut down the HVAC system when the process fluid includes a threshold of the acid such that the trigger mechanism actuates the inhibitor.

A microchannel heat exchanger has an upper portion connected in fluid communication with a header, a lower portion connected in fluid communication with the header at a location that is vertically lower on the header than the upper portion, and a sight glass on the header. The sight glass can be horizontally aligned with a top of the second portion. The sight glass can be served as a visual aid when charging the microchannel heat exchanger with a refrigerant at a predetermined level. When an indicator indicates that refrigerant is mixed vapor and liquid, refrigerant can be added into the microchannel heat exchanger. When the indicator indicates that the refrigerant is liquid, the charging process can be stopped.

A heat cycle system is a heat cycle system (1) using a working medium containing hydrofluoroolefin (HFO) that has a double bond in a molecule structure, the heat cycle system (1) having a compressor (10), a high-pressure side heat exchanger (12), a low-pressure side heat exchanger (14), an expansion mechanism (13), and an acid detection means (40) which is disposed in a discharge pipe (21) connecting the compressor (10) and the high-pressure side heat exchanger (12) and which detects acid generated by decomposition of the working medium in a heat cycle.

A microchannel heat exchanger has an upper portion connected in fluid communication with a header, a lower portion connected in fluid communication with the header at a location that is vertically lower on the header than the upper portion, and a sight glass on the header. The sight glass can be horizontally aligned with a top of the second portion. The sight glass can be served as a visual aid when charging the microchannel heat exchanger with a refrigerant at a predetermined level. When an indicator indicates that refrigerant is mixed vapor and liquid, refrigerant can be added into the microchannel heat exchanger. When the indicator indicates that the refrigerant is liquid, the charging process can be stopped.

The present disclosure relates to controls and related methods for mitigating liquid (e.g., compressor refrigerant, etc.) migration and/or floodback.