A heat exchanger comprising a pair of metal plates joined along corresponding mating surfaces, wherein at least one of the metal plates comprises a plurality of connected recesses which form a fluid circuit between the plates when the plates are joined, wherein the fluid circuit comprises an inlet, an inlet manifold, an outlet, an outlet manifold, and a plurality of flowpaths extending between and fluidly connecting the inlet manifold and outlet manifold, and wherein one or more of the plurality of flowpaths comprise a fluid passage and a flow constriction and wherein a ratio of the hydraulic diameter of the flow constriction to the hydraulic diameter of the fluid passage increases with increasing distance from the inlet.

A refrigeration system includes a compressor for compressing a gaseous refrigerant, such that the temperature and pressure thereof increases, whereas the boiling point thereof decreases; a condenser, in which the gaseous refrigerant from the compressor exchanges heat with a high temperature heat carrier, said heat exchange resulting in the refrigerant condensing; an expansion valve reducing the pressure of liquid refrigerant from the condenser, hence reducing the boiling point of the refrigerant; an evaporator, in which the low boiling point refrigerant exchanges heat with a low temperature heat carrier, such that the refrigerant vaporizes; and a suction gas heat exchanger exchanging heat between high temperature liquid refrigerant from the condenser and low temperature gaseous refrigerant from the evaporator. The low temperature gaseous refrigerant entering the suction gas heat exchanger contains a certain amount of low temperature liquid refrigerant, said low temperature liquid refrigerant vaporizing as a result of the heat exchange with the high temperature liquid refrigerant from the condenser. Disclosed is also a refrigeration method.

A brazed plate heat exchanger (100) includes a plurality of first and second heat exchanger plates (110, 120) having different patterns of ridges and grooves providing contact points between neighbouring plates under formation of interplate flow channels for fluids to exchange heat, said interplate flow channels being in selective fluid communication with first, second, third and fourth large port openings (O1, O2, O3, O4) and first and second small port openings (SO1, SO2) forming a suction gas heat exchanger together with a dividing surface (DW). The ridges (R1, R2a, R2b) and grooves (G1, G2a, G2b) are formed such that the interplate flow channels between different plate pairs have different volumes. Disclosed is also a refrigeration system and method including such as heat exchanger.

A heat exchanger module includes a skin condenser and a skin evaporator. The skin condenser includes an inner condenser plate, an outer condenser plate coupled to the inner condenser plate and a condenser tube channel formed on one of the inner condenser plate and/or the outer condenser plate. The evaporator includes an inner evaporator plate, an outer evaporator plate coupled to the inner evaporator plate, and an evaporator tube channel formed on one of the inner evaporator plate and/or the outer evaporator plate. The heat exchanger also includes an insulation layer extending between the inner condenser plate and the inner evaporator plate. Each of the plates that form the skin condenser and/or evaporator can be formed from different materials and/or have different material thicknesses to reduce heat transfer through the insulation layer from the condenser to the evaporator while also promoting heat transfer through natural convection with surrounding air.

The present disclosure relates to a refrigerator with an improved structure capable of improving cooling efficiency. A refrigerator according to an embodiment of the present disclosure includes a main body; a storage room formed in the main body, wherein a front part of the storage room is opened; a door configured to open or close the opened front part of the storage room; an evaporator installed in a back part of the storage room; an evaporator cover configured to partition the storage room into a storage area and a cool air generating area in which the evaporator is disposed; a first flow path formed between the evaporator and a back surface of the storage room; and a second flow path formed between the evaporator and the evaporator cover.

Disclosed are an evaporator, a refrigerator using the evaporator, and a method for controlling the refrigerator. The evaporator includes a refrigerant evaporation unit in which a flow passage where a refrigerant evaporates is formed, and a phase change material (PCM) accommodation unit that is coupled to the refrigerant evaporation unit and accommodates the PCM whose phase is changed according to latent heat absorbed by the refrigerant, wherein the PCM is brought into direct contact with an outer surface of the refrigerant evaporation unit inside the PCM accommodation unit.

An evaporator (10) includes a substantially plate-like body member (12) defining an operatively outer surface (14) and an operatively inner surface (16), both surfaces (14, 16) being substantially smooth to inhibit detritus from attaching to the body member (12). The body member (12) is shaped to cause incoming fluid from which heat is to be extracted, in use, to follow an extended, circuitous path past the body member (12) initially along the outer (surface 14) of the body member (12) prior to the fluid impinging on the inner surface (16) of the body member (12).

A refrigerant evaporator includes a first core, a second core, a first plate, and a second plate. The first core and the second core respectively include a plurality of first tubes and a plurality of second tubes extending along a tube longitudinal direction and stacked along a tube stacking direction. The first plate houses one end portions of the first tubes and the second tubes. The second plate faces the first core and the second core across the first plate and is joined to the first plate in the tube longitudinal direction. The second plate includes a plurality of ribs. The ribs and the first plate define a plurality of intermediate passageways therein. Each of the intermediate passageways allows communication between a corresponding one of the first tubes and a corresponding one of the second tubes.

Disclosed is an evaporator, comprising: a heating tube left as an empty space between first and second case sheets, which form an evaporator case, so as not to be overlapped with a cooling tube, and forming a heating passage in which a working liquid for defrosting flows; and a heater attached to the outer surface, which corresponds to the heating tube, of the evaporator case so as to heat the working liquid inside the heating tube. The heating tube can have a structure which an inlet and an outlet are respectively formed at both sides of a heater attachment part in the longitudinal direction and both end portions of a passage part are respectively connected to the inlet and the outlet, or can have a structure in which an opening is formed at one side of the heater attachment part, the working liquid heated by the heater is discharged through the opening, and the cooled working liquid is returned. The structures can form the heating passage, enabling the working liquid to circulate therethrough, without forming the inlet and the outlet, which are respectively connected to both end portions of the passage part, to be parallel at one side of the heater attachment part.

A roll bond plate evaporator structure is disclosed. The roll bond plate evaporator structure includes a heat dissipation member, at least one inlet and at least one outlet. The heat dissipation member is composed of a first plate body and a second plate body, which are correspondingly mated with each other. The first and second plate bodies together define a flow way. A working fluid is filled in the flow way. The inlet is formed at one end of the heat dissipation member in communication with the flow way and the outlet is formed at the other end of the heat dissipation member in communication with the flow way.