Abstract: A heat exchanger of an air conditioner includes a housing having a cabinet side housing region and an external housing region, and a partition wall element arranged therebetween which fluidically separates the cabinet side housing region and the external housing region, with a pipe system having a first manifold and a second manifold and multiple pipe elements, the free ends of which open into the manifolds, at least one manifold having a coolant inlet and at least one manifold having a coolant outlet, fluidly connected by the pipe system, the pipe elements are connected with two mounting plates which surround the pipe elements in a gas-impermeable manner, so that the heat exchanger can be installed in the partition wall element so that in the assembled state the manifolds are in the external housing region and at least portions of the pipe elements are in the cabinet side housing region.

Abstract: A cooling system, in particular for electronics cabinets, comprising a casing, wherein the cooling system comprises a first cooling circuit and a second cooling circuit, the first cooling circuit comprising a heat releasing section and the second cooling circuit comprising a heat releasing section, is provided, wherein the casing comprises at least three compartments including a cabinet side compartment, a first external side compartment and a second external side compartment, wherein the three compartments are fluidically separated from each other so that respective airflows in the cabinet side compartment, the first external side compartment and the second external side compartment do not mix, wherein the heat releasing section of the first cooling circuit is arranged in the first external side compartment and wherein the heat releasing section of the second cooling circuit is arranged in the second external side compartment.