A heat therapy device including a care unit presenting a lying surface for supporting an infant, a hood (1) which is moveable between a closed position covering the care unit and an opened position clearing the top of the care unit, a radiation heating (4) arranged such that it can irradiate the lying surface in the opened position of the hood, a convection heating (2), and control units which are configured and arranged to control the operation of the radiation and convection heatings, wherein tire control units are configured and arranged to control the operation of the convection heating (2) as a primary heating when the hood (1) is in the closed position and to control the operation of the radiation heating (4) as the primary heating when the hood is in the opened position, the control units are further configured and arranged to operate the radiation heating (4) in a standby mode when the hood is closed and to operate the convection heating (2) in a standby mode when the hood is in the opened position, when the hood begins to open, to operate the radiation heating (4) for a predetermined heating-up period at a predetennuied maximum radiation heating output, and after expiration of the heating-up period to change over to a controlled operation of the radiation heating (4), after the beginning of the closing of the hood (1), to operate the convection heating (2) for a predetennmed heating-up period at an increased convection heating output, and after expiration of the heating-up period, to change over to a controlled operation of the convection heating (2).Cette invention concerne un dispositif de traitement par la chaleur comportant une unité de soins présentant un plateau sur lequel est allongé un nourrisson, une hotte (1) qui peut passer dune position fermée recouvrant lunité de soins à une position ouverte dégageant le toit de lunité de soins, un chauffage par rayonnement (4) disposé de manière à exposer le plateau en position ouverte de la hotte, un chauffag
