A heat exchanger includes plural heat exchange units arranged in series in a flowing direction of external fluid. A tube of the heat exchange units has a tube body and a protrusion. A dimension of the protrusion in a tube stacking direction is smaller than a dimension of the tube body in the tube stacking direction. A dimension of the protrusion in an air flowing direction is larger than a thickness of the tube body. An outer fin is joined to both the upstream tube and the downstream tube arranged in the air flowing direction. The protrusion of the upstream tube is connected to an upstream end of the tube body in the air flowing direction. The protrusion of the downstream tube is connected to a downstream end of the tube body in the air flowing direction.

An evaporator includes a housing having a first end longitudinally opposing a second end. The evaporator includes an inlet disposed on the housing and configured to receive a fluid. The evaporator also includes a tube bundle disposed in the housing and configured to evaporate the fluid to provide a vapor stream arranged to exit through an outlet on the housing. Additionally, the evaporator has a flow balancer provided between the tube bundle and the outlet on the housing, and the flow balancer is configured to balance refrigerant quality between the first end and the second end of the evaporator by controlling the vapor stream.

An ice maker evaporator assembly having an evaporator pan with a back wall and left, right, top and bottom sidewalls extending from the back wall, and a freeze plate located within the evaporator pan. Refrigerant tubing is thermally coupled to the back wall of the evaporator pan opposite the left, right, top and bottom sidewalls. A first layer of insulation is formed on the refrigerant tubing. An evaporator housing having a housing back wall and housing left, right, top and bottom sidewalls extending from the housing back wall is attached to the evaporator pan and covers refrigerant tubing. A second layer of insulation is formed on top of the first layer of insulation.

A refrigerator includes a cabinet that defines a freezing compartment and a refrigerating compartment, and an evaporator installed in the freezing compartment. The evaporator includes: an evaporator case that defines a food storage space formed therein; a cooling tube located at the evaporator case in a predetermined pattern and configured to receive a coolant; and a sheath heater disposed outside of the evaporator case to be adjacent to at least one surface of the evaporator case, the sheath heater being configured to generate heat such that heat for defrosting is transferred to the evaporator case. The sheath heater reduces the defrosting time to maintain the freshness of food, increases the cooling efficiency, and reduces power consumption. The defrosting efficiency by the sheath heater is improved by a reflection member, and an inflow of heat, generated when defrosting, into the refrigerating compartment is reduced by a heat insulation member.

An evaporator comprises: an evaporator case having first and second case sheets coupled to each other and bent such that both sides of the evaporator case are open, thereby forming a box shape, a food storing space being formed inside the evaporator case; a cooling tube provided as an empty space between the first and second case sheets, thereby forming a cooling channel through which a refrigerant flows; and a heating tube formed as an empty space between the first and second case sheets so as not to overlap with the cooling tube, thereby forming a heating channel for defrosting, wherein the cooling tube and the heating tube are shaped to protrude to the outside of the evaporator case, and the evaporator case has an inner surface formed to be flat.

A plate heat exchanger includes: a plurality of heat transfer plates including first to fourth through-holes to extend through the heat transfer plate, stacked in a single direction to isolate first and second water flow passages; and end plates including first and second inlet and outlet ports, and a connection port, that the heat transfer plates are sandwiched between The first inlet and outlet port, continuous with the first and second through-holes, allow a first fluid to flow into and out of the first flow passage. The second inlet and outlet port, continuous with the third and fourth through-holes, allow a second fluid to flow into and out of the second flow passage. The connection port is connected to a pressure relief valve provided separately from the plate heat exchanger.

Disclosed herein is a refrigerator. The refrigerator includes a body, a storage compartment provided to allow a front surface thereof to be open in the body and including a freezing compartment and a refrigerating compartment, a freezing compartment evaporator provided at a rear of the freezing compartment and configured to generate cold air supplied to the freezing compartment and the refrigerating compartment, a fan including a first fan configured to guide cold air generated by the freezing compartment evaporator to the freezing compartment, and a second fan configured to guide the cold air generated by the freezing compartment evaporator to the refrigerating compartment, and a variable temperature compartment formed by a roll-bond evaporator disposed inside the refrigerating compartment.

Disclosed herein is a refrigerator. The refrigerator includes a cabinet, a first storage compartment formed in the cabinet, a second storage compartment formed in the cabinet to be separated from the first storage compartment, a cooling chamber including an evaporator configured to generate cold air, the cooling chamber connected to the first storage compartment to allow the cold air to be supplied to the first storage compartment, a cold air duct connected to the evaporator to receive the cold air, and a cooling plate configured to exchange heat with cold air in the cold air duct and provided to form one surface of the second storage compartment.

A heat exchanger includes a shell, refrigerant distributor, tube bundle, and a first baffle. The shell has a refrigerant inlet through which at least refrigerant with liquid refrigerant flows and a shell refrigerant vapor outlet. A longitudinal center axis of the shell extends substantially parallel to a horizontal plane. The refrigerant distributor fluidly communicates with the refrigerant inlet and is disposed within the shell. The refrigerant distributor has at least one liquid refrigerant distribution opening that distributes liquid refrigerant. The tube bundle is disposed inside of the shell below the refrigerant distributor. The first baffle extends from a first lateral side of the shell. The first baffle is vertically disposed 5% to 40% of an overall height of the shell above a bottom edge of the shell, and extends laterally inwardly from the first lateral side by a distance not more than 20% of a width of the shell.

A shell-and-tube heat exchanger and an air conditioning system. The shell-and-tube heat exchanger includes: a shell provided with a liquid inlet and an vapor outlet, the vapor outlet being disposed at an top portion of the shell; and a heat exchange tube bundle disposed in the shell in an axial direction of the shell; wherein the heat exchange tube bundle includes: a plurality of first heat exchange tubes located at an upper portion, the first heat exchange tubes having a first spacing therebetween; and a plurality of second heat exchange tubes located at a lower portion, the second heat exchange tubes having a second spacing therebetween; the first spacing is different from the second spacing.