Arrangement for a combined cooling and
heating system with a
refrigeration circuit and a
heat pump circuit, which have a common
evaporator-condenser (70) and are thus thermally connected to each other, wherein the
refrigeration circuit also has at least one
evaporator (3), a
refrigeration compressor (1) and a
throttle valve (5) directly connected to a liquid outlet (740) of the common
evaporator-condenser (70) and the
heat pump circuit also has at least one
heat pump compressor (2), a condenser (4) and a heat pump
throttle valve (6), the heat pump
throttle valve (6) being arranged downstream of the condenser (4), the evaporator-condenser (70) having separate channels belonging to the refrigeration circuit on the one hand and to the heat pump circuit on the other, and the wall parts of the channels of the evaporator-condenser (70) having
heat transfer surfaces that border the refrigeration circuit on the one hand and the heat pump circuit on the other.characterized in that, in addition to the components listed above, at least one controllable
heat exchanger, a
waste heat cooler (10), is arranged downstream of the
refrigeration compressor (1) in the refrigeration circuit, and that, in addition to the components listed above, at least one controllable
heat exchanger, an auxiliary evaporator (90) with outlet (104) and inlet (103), is arranged in the heat pump circuit, and a flow connection with an auxiliary throttle valve (61) is provided downstream of the condenser (4), which opens into the auxiliary evaporator (90), wherein the
waste heat cooler (10) is connected to an external
heat sink between outlet (102) and inlet (101), and the auxiliary evaporator (90) is connected to an external heat source between outlet and inlet.