Hill Phoenix, Inc.

A refrigeration system having a primary receiver, a secondary receiver, a first gas bypass valve, and second gas bypass valve, a feed control valve, and a controller. The primary receiver has a primary receiver operating pressure and is configured to collect a refrigerant circulated by the refrigeration system. The secondary receiver includes a liquid refrigerant inlet fluidly coupled to a primary receiver liquid refrigerant outlet. The feed control valve is coupled between the primary receiver liquid outlet and the secondary receiver liquid refrigerant inlet. The controller operates the feed control valve to control a flow of a liquid refrigerant from the primary receiver to the secondary receiver.

A refrigeration system includes at least one compressor and an oil separator fluidly coupled to the compressor. The oil separator is positioned downstream of the compressor and is configured to receive a fluid output from the compressor. The oil separator includes a housing including a first end including a first outer surface and a first inner surface; a second end including a second outer surface and a second inner surface; a sidewall, the first end, the second end, and the sidewall defining a centrifugal chamber. The refrigeration system includes a fluid inlet positioned on the sidewall adjacent the first end, a coolant outlet positioned adjacent the first end, an oil outlet positioned adjacent the second end, and a filter fluidly coupled to the coolant outlet, the filter extending from the first inner surface of the first end to the second inner surface of the second end.

A refrigerated display case door glass panel assembly includes a first pane of glass and a second pane of glass bounding a sealed space between the panes, and an electrically conductive coating applied to a surface of the first pane. The coating extending across at least a majority of a viewing area of the first pane. A first pair of electrical buses spaced apart from one another and electrically connected to the coating at respective first and second ends of the first pane, the first and second ends being opposite one another, and a second pair of electrical buses spaced apart from one another and electrically connected to the coating at respective third and fourth ends of the first pane. The third and fourth ends being opposite one another and adjacent to the first and second ends.

A refrigerated display case system includes a display case that defines an inner volume; a closed-circuit refrigeration system; and a control system. The closed-circuit refrigeration system includes a compressor; a condenser assembly; and a cooling assembly that includes a cooling coil and an evaporator fan configured to circulate an airflow from the inner volume through the cooling coil to cool the airflow with a liquid phase of a hydrocarbon refrigerant supplied from the condensing unit. The evaporator fan is configured to circulate the cooled airflow to the inner volume to adjust or maintain a temperature of the inner volume. The control system is configured to perform operations including operating the condensing unit and the cooling assembly in a refrigeration cycle to cool the inner volume and a defrost cycle to defrost the cooling assembly; and operating the evaporator fan independent of the refrigeration cycle and the defrost cycle.

A refrigeration system includes one or more compressors, a gas cooler/condenser, a receiver tank, one or more evaporators, an expansion valve, a sensor, and a controller. The controller is coupled to the sensor and the expansion valve. The controller receives sensor feedback from the sensor and performs operations, including determining, as a function of the sensor feedback, that a discharge air temperature of an airflow circulated through the one or more evaporators satisfies a discharge air temperature threshold. The discharge air temperature is cooled by the working fluid in the one or more evaporators. The operations also includes controlling, as a function of determining that the discharge air temperature satisfies the discharge air temperature threshold, the expansion valve to maintain or switch a mode of operation of the one or more evaporators. The modes of operation include a first temperature mode and a second temperature mode.

Systems and methods for deploying a defrost heater include a rod heater bracket that includes a body including a first edge and a second edge opposite the first edge. The bracket includes at least one L-shaped slot formed in the body. The L-shaped slot includes an opening along the first edge, and a groove located adjacent to the second edge and configured to retain at least a portion of a rod heater adjacent an evaporator of a refrigerated display case. The rod heater bracket includes a tab configured to be adjusted between an open position to allow access to the groove through the second edge and a closed position to block access to the opening between the second edge and the groove.

A refrigeration system includes a refrigeration circuit and a coolant circuit separate from the refrigeration circuit. The refrigerant circuit includes a gas cooler/condenser, a receiver, and an evaporator. The coolant circuit includes a heat exchanger configured to transfer heat from a refrigerant circulating within the refrigeration circuit into a coolant circulating within the coolant circuit, a heat sink configured to remove heat from the coolant circulating within the coolant circuit, and a magnetocaloric conditioning unit configured to transfer heat from the coolant within a first fluid conduit of the coolant circuit into the coolant within a second fluid conduit of the coolant circuit. The first fluid conduit connects an outlet of the heat exchanger to an inlet of the heat sink, whereas the second fluid conduit connects an outlet of the heat sink to an inlet of the heat exchanger.

A refrigeration system includes one or more compressors ( 14,24 ), a gas cooler ( 105 ), a flash tank ( 106 ), one or more evaporators ( 12,22 ), a heat reclaim system ( 110 ), valves ( 120,122,124,126 ), and a control system ( 105 ). The heat reclaim system receives a working fluid from the one or more compressors and the gas cooler. The heat reclaim system is fluidly coupled, through a first supply line ( 111 ), to the one or mor compressors, and fluidly coupled, through a second supply line ( 113 ), to the gas cooler. The valves regulate a flow of the working fluid from the one or more compressors and the gas cooler to the heat reclaim system. The control system receiving at least one feedback signal from the heat reclaim system and, in response to the at least one feedback signal, operates the valves to regulate an amount of the working fluid circulated into the heat reclaim system from the one or more compressors and the gas cooler.

A refrigerated display case chassis includes a first insulated panel and a second insulated panel. The first insulated panel has a first foam layer bounded by a first pair of thermally conductive sheets. The first insulated panel forms a first wall of the refrigerated display case chassis. The second insulated panel has a second foam layer bounded by a second pair of thermally conductive sheets. The second insulated panel forms a second wall of the refrigerated display case chassis. The second insulated panel mates with the first insulated panel to form a thermally insulated joint where, in cross-section, one sheet of the first pair of thermally conductive sheets terminates at a surface of the second foam layer. The thermally conductive sheets have a greater thermal conductivity than the first or second foam layers.

A thermoelectric cooling system includes a first circuit, a second circuit, a circuit heat exchanger, and a thermoelectric subsystem. The first circuit is configured to circulate a first refrigerant. The second circuit is configured to circulate a second refrigerant. The circuit heat exchanger includes a circuit heat exchanger first passage and a circuit heat exchanger second passage. The circuit heat exchanger first passage is coupled to the first circuit and configured to receive the first refrigerant from the first circuit and provide the first refrigerant to the first circuit. The circuit heat exchanger second passage is coupled to the second circuit and configured to receive the second refrigerant from the second circuit and provide the second refrigerant to the second circuit. The thermoelectric subsystem includes a thermoelectric subsystem first heat exchanger and a first thermoelectric cell. The thermoelectric subsystem first heat exchanger has a thermoelectric subsystem first heat exchanger passage.