An evaporator assembly for use in a refrigeration appliance, in particular a domestic refrigerator comprising: an inner case which forms a refrigeration compartment; and an outer case which forms a body of the refrigeration appliance, the evaporator assembly comprising - a casing for accommodating an evaporator for refrigerating the refrigeration compartment, wherein the casing has an air inlet and an air outlet for circulating the air inside the refrigeration compartment via the evaporator by means of a fan, - said casing has a front cover and a rear cover which are detachably attachable to each other, wherein - the front cover forms a portion of an inner case, - the rear cover has on its inner surface a protrusion which firmly abuts against an opposing surface of the front cover, - a cross-section and a material of the protrusion is configured to exhibit a sufficient strength to withstand without being deformed, a pressure exerted by a curing foam material which is injected between the outer surface of the rear cover and the outer case during an assembly process, - the protrusion is formed at a position on said inner surface so as not to obstruct installation of the evaporator at a designated mounting position inside the casing, - the protrusion has a mounting portion for detachably attaching the evaporator to the rear cover, the evaporator assembly being characterised in that - the mounting portion has two resilient legs each having an arc-shaped recess which are formed to oppose each other, wherein the arc-shaped recesses are configured to snap-fittingly engage with a refrigerant conveying tube of the evaporator, and wherein the resilient legs are configured to firmly abut against the surface of the front cover. - a casing for accommodating an evaporator for refrigerating the refrigeration compartment, wherein the casing has an air inlet and an air outlet for circulating the air inside the refrigeration compartment via the evaporator by means of a fan, - said casing has a front cover and a rear cover which are detachably attachable to each other, - the front cover forms a portion of an inner case, - the rear cover has on its inner surface a protrusion which firmly abuts against an opposing surface of the front cover, - a cross-section and a material of the protrusion is configured to exhibit a sufficient strength to withstand without being deformed, a pressure exerted by a curing foam material which is injected between the outer surface of the rear cover and the outer case during an assembly process, - the protrusion is formed at a position on said inner surface so as not to obstruct installation of the evaporator at a designated mounting position inside the casing, - the protrusion has a mounting portion for detachably attaching the evaporator to the rear cover, the evaporator assembly being characterised in that - the mounting portion has two resilient legs each having an arc-shaped recess which are formed to oppose each other, wherein the arc-shaped recesses are configured to snap-fittingly engage with a refrigerant conveying tube of the evaporator, and wherein the resilient legs are configured to firmly abut against the surface of the front cover.