A refrigeration unit includes a cabinet with a refrigerator compartment, a freezer compartment, and a machine compartment. The cabinet includes a mullion region between the refrigerator compartment and the freezer compartment, a first pass-through therethrough providing access from an external environment to the refrigerator compartment, and a second pass-through therethrough providing access from the external environment to the freezer compartment. The cabinet further includes a third pass-through extending through the mullion region, and a refrigerant system. The refrigerant system includes a three-way valve configured to direct a refrigerant down a first flow path or a second flow path, the refrigerant in the first flow path flows through the first pass-through, a first evaporator, the third pass-through, and the second evaporator, and the refrigerant in the second flow path flows through the second pass-through and the second evaporator.

A heat pump device having a refrigerant circuit includes: a valve configured to maintain an opening degree during non-energization; a valve drive circuit configured to cause operation of the valve; a valve controller configured to control the valve drive circuit; and a power source circuit configured to supply a power source to the valve drive circuit. The power source circuit includes: a first power source circuit unit configured to receive power source supply from outside to generate a DC voltage; and a second power source circuit unit for backup. The second power source circuit unit receives power source supply from the outside to store power in a capacitor, and connects the capacitor in parallel to a first output electric path of the first power source circuit unit.

A heat pump device having a refrigerant circuit includes: a valve configured to maintain an opening degree during non-energization; a valve drive circuit configured to cause operation of the valve; a valve controller configured to control the valve drive circuit; and a power source circuit configured to supply a power source to the valve drive circuit. The power source circuit includes: a first power source circuit unit configured to receive power source supply from outside to generate a DC voltage; and a second power source circuit unit for backup. The second power source circuit unit receives power source supply from the outside to store power in a capacitor, and connects the capacitor in parallel to a first output electric path of the first power source circuit unit.

A suction-capillary tube assembly which comprises a main pipe including a suction hole formed inside the main pipe along a longitudinal direction of the main pipe and a capillary hole formed inside the main pipe along the longitudinal direction of the main pipe; a first terminal suction pipe disposed at one end of the suction hole of the main pipe to communicate with the suction hole; and a first terminal capillary pipe disposed at one end of the capillary hole of the main pipe to communicate with the capillary hole.

A suction-capillary tube assembly which comprises a main pipe including a suction hole formed inside the main pipe along a longitudinal direction of the main pipe and a capillary hole formed inside the main pipe along the longitudinal direction of the main pipe; a first terminal suction pipe disposed at one end of the suction hole of the main pipe to communicate with the suction hole; and a first terminal capillary pipe disposed at one end of the capillary hole of the main pipe to communicate with the capillary hole.

Systems and methods for vapor compression systems having at least one multi-circuit heat exchanger and a distributor designed to receive multi-phase refrigerant from an expansion valve and evenly distribute the multi-phase refrigerant using the distributor have been developed for improved efficiency and reduced cost. The distributor may be positioned in close proximity to the expansion valve and may be oriented with respect to an output of the expansion valve to cause the refrigerant flow to impact the distributor and enhance turbulent flow to facilitate mixing of the liquid and vapor refrigerant. Channels extending from the distributor may be positioned with respect to the output of the expansion valve to facilitate even distribution of the multi-phase refrigerant flow. With each circuit of the multi-circuit heat exchanger supplied with evenly distributed multi-phase refrigerant, efficiency will be improved.

Systems and methods for vapor compression systems having at least one multi-circuit heat exchanger and a distributor designed to receive multi-phase refrigerant from an expansion valve and evenly distribute the multi-phase refrigerant using the distributor have been developed for improved efficiency and reduced cost. The distributor may be positioned in close proximity to the expansion valve and may be oriented with respect to an output of the expansion valve to cause the refrigerant flow to impact the distributor and enhance turbulent flow to facilitate mixing of the liquid and vapor refrigerant. Channels extending from the distributor may be positioned with respect to the output of the expansion valve to facilitate even distribution of the multi-phase refrigerant flow. With each circuit of the multi-circuit heat exchanger supplied with evenly distributed multi-phase refrigerant, efficiency will be improved.

A valve device includes a case including an open lower portion and an accommodation space provided therein, a base plate to cover the open lower portion of the case, a refrigerant inlet pipe connected to the base plate and to allow a refrigerant to flow into the accommodation space, an inlet and outlet pipe connected to the base plate to allow the refrigerant to flow in and out, a boss including a refrigerant inlet and outlet hole formed at a first position spaced apart from a center to communicate with the inlet and outlet pipe, and an extending groove extending radially outward from the first position to a second position and connected to the refrigerant inlet and outlet hole, and a pad including an open cavity rotatable on one side of the boss to close the refrigerant inlet and outlet hole and to open the extending groove.

A valve device includes a case including an open lower portion and an accommodation space provided therein, a base plate to cover the open lower portion of the case, a refrigerant inlet pipe connected to the base plate and to allow a refrigerant to flow into the accommodation space, an inlet and outlet pipe connected to the base plate to allow the refrigerant to flow in and out, a boss including a refrigerant inlet and outlet hole formed at a first position spaced apart from a center to communicate with the inlet and outlet pipe, and an extending groove extending radially outward from the first position to a second position and connected to the refrigerant inlet and outlet hole, and a pad including an open cavity rotatable on one side of the boss to close the refrigerant inlet and outlet hole and to open the extending groove.