A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first region of a first heat exchanger, a second heat exchanger, and a bypass branch. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The first heat exchanger is positioned downstream of the outlet of the compressor. The second heat exchanger is positioned downstream of the first heat exchanger. The bypass branch includes an entrance and an exit. The entrance to the bypass branch is positioned downstream of the outlet of the compressor and upstream of the first region of the first heat exchanger. The exit of the bypass branch is positioned upstream of the second heat exchanger.

A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first region of a first heat exchanger, a second heat exchanger, and a bypass branch. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The first heat exchanger is positioned downstream of the outlet of the compressor. The second heat exchanger is positioned downstream of the first heat exchanger. The bypass branch includes an entrance and an exit. The entrance to the bypass branch is positioned downstream of the outlet of the compressor and upstream of the first region of the first heat exchanger. The exit of the bypass branch is positioned upstream of the second heat exchanger.

The heat exchanger includes heat exchange units. Each of the heat exchange units includes a plurality of plate fins and a plurality of flat tubes. The plate fins are arranged spaced apart from one another at intervals so as to allow air to flow therebetween. The flat tubes each have an L shape by bending and inserted through the plate fins so that a refrigerant flows therethrough in a direction in which the plate fins are arranged. The heat exchange units are combined to each other so as to form a rectangular shape. Thus, heat exchange can be efficiently performed by increasing the mounting area.

A device having a heat exchanger, wherein the heat exchanger has pipes which carry a cooling medium, wherein the heat exchanger has a fin arrangement which is penetrated by the pipes, and wherein the heat exchanger has a heating device integrated in the heat exchanger, with a control device for controlling the heating device, wherein the heating device has two or more separately controllable heating sections, wherein each heating section is assigned a defrosting area of the heat exchanger, and wherein the heating device is set up for the separate defrosting of individual defrosting areas of the heat exchanger by the separately controllable heating sections.

A cold plate includes a main body in contact with a heat source. The main body has: an inflow hole through which a refrigerant flows in; an outflow hole through which the refrigerant flows out; and an internal space communicating with the inflow hole and the outflow hole and through which the refrigerant flows, and includes: a first heat exchange layer in the internal space; and a second heat exchange layer in the internal space. The first heat exchange layer and the second heat exchange layer are laminated in a thickness direction of the first heat exchange layer and of the second heat exchange layer.

A cold plate includes a main body in contact with a heat source. The main body has: an inflow hole through which a refrigerant flows in; an outflow hole through which the refrigerant flows out; and an internal space communicating with the inflow hole and the outflow hole and through which the refrigerant flows, and includes: a first heat exchange layer in the internal space; and a second heat exchange layer in the internal space. The first heat exchange layer and the second heat exchange layer are laminated in a thickness direction of the first heat exchange layer and of the second heat exchange layer.

A combined heat exchanger, a heat exchange system, and an optimization method thereof are provided. The heat exchange system includes: an enhanced vapor injection compressor, a condenser, an expansion valve and an evaporator, which are located in a main circuit; wherein the heat exchange system further includes a first branch branched from the main circuit to an vapor injection port of the compressor at a branch point P downstream of the condenser, and a first heat exchange unit and a second heat exchange unit are further provided in the main circuit between the branch point P and the expansion valve; and wherein a refrigerant leaving the condenser is divided at the branch point P into a first portion passing through the first heat exchange unit and the second heat exchange unit from the main circuit, and a second portion passing through the first branch to the vapor injection port.

A combined heat exchanger, a heat exchange system, and an optimization method thereof are provided. The heat exchange system includes: an enhanced vapor injection compressor, a condenser, an expansion valve and an evaporator, which are located in a main circuit; wherein the heat exchange system further includes a first branch branched from the main circuit to an vapor injection port of the compressor at a branch point P downstream of the condenser, and a first heat exchange unit and a second heat exchange unit are further provided in the main circuit between the branch point P and the expansion valve; and wherein a refrigerant leaving the condenser is divided at the branch point P into a first portion passing through the first heat exchange unit and the second heat exchange unit from the main circuit, and a second portion passing through the first branch to the vapor injection port.