Heating body

A heater (10, 46, 66, 98, 112, 120, 122) comprising:

• several heat tubes (14) filled with a working medium (12), extending preferably parallel or substantially parallel and each having a first end (20) and a second end (22), and a heat source (16, 102) thermally coupled to the first and/or second ends (20, 22) of the heat tubes (14), the first ends (20) of the heat tubes (14) being designed open and fluidically connected to a first transverse connection tube (24) and
• the second ends (22) of the heat tubes (14) being designed open and fluidically connected to a second transverse connection tube (26),
• the heat tubes (14) and the transverse connection tubes (24, 26) forming a common cavity filled with the working medium (12), and
• the second transverse connection tube (24, 26) being thermally coupled to the heat source (16, 102) to receive heat from the heat source (16, 102),
• wherein the heat source (16) is a heating tube through which a gaseous or liquid heating medium (18) can flow, the heating tube (16) being arranged coaxially in the second transverse connection tube (24, 26) along a longitudinal axis and being surrounded by the working medium (12);
• connectors (32, 34) of the heating tube (16) are connected to the transverse connection tube (24, 26) at the end face in pressure-tight and fluid-tight manner;
• the heater (46;
• 66) has a connection system (48;
• 70) with a flow connection (50;
• 72) and a return connection (62;
• 86), the flow being connected via a first bypass tube (52;
• 74) to a control valve (54;
• 76) which is coupled to a connector (56;
• 78) projecting at an end face from the second transverse connection tube (26);
• and a second bypass tube (58;
• 80) extends from the control valve (54;
• 76) preferably parallel to the first bypass tube, is in fluidic connection to the heating tube (16) and is coupled to the return connection (62;
• 86).