A device having an air cushion for heating room air and a liquid

Abstract

Example embodiment relate to a device for heating room air and a liquid. Room air enters and exits the device via an air inlet and an air outlet, and the liquid enters and exits the device via a liquid inlet and a liquid outlet. The heat transfer device transfers the thermal energy produced by an energy unit to the liquid in an interaction area of a medium line. A conveying device moves liquid and/or air between a medium container and the medium line. A control unit controls the conveying device. In case the device is intended to heat only room air in an air mode, the control unit, in a preparation step, controls the conveying device such that the conveying device moves air from an air cushion in the medium container through the medium line.

1 . A device for heating room air and a liquid, comprising:
 an air inlet, an air outlet, a liquid inlet, a liquid outlet, an energy unit, a heat transfer device, a medium container, a medium line, a conveying device and a control unit,   wherein room air to be heated enters the device via the air inlet,   wherein heated room air exits the device via the air outlet,   wherein liquid to be heated enters the device via the liquid inlet,   wherein heated liquid exits the device via the liquid outlet,   wherein the energy unit produces thermal energy,   wherein the heat transfer device transfers the thermal energy produced by the energy unit to the room air and/or the liquid,   wherein the medium container serves to receive liquid and air,   wherein the medium line serves to conduct liquid and air,   wherein the heat transfer device and the medium line are configured and arranged relative to each other such that the heat transfer device transfers thermal energy to the liquid present in the medium line,   wherein the conveying device serves to move liquid and/or air from the medium container to the medium line, and from the medium line to the medium container,   wherein the control unit controls the conveying device, and   wherein in case the device is intended to heat only room air in an air mode, the control unit, in a preparation step, controls the conveying device such that the conveying device moves air from an air cushion in the medium container through the medium line.   
     
     
         2 . The device according to  claim 1 , wherein the medium container, the conveying device, and the medium line are configured and adapted to each other such that an amount of air in the medium container, the conveying device, and the medium line remains substantially constant. 
     
     
         3 . The device according to  claim 1 , wherein in the preparation step, the conveying device removes air from the air cushion and supplies it back to the medium container after the passage through the medium line. 
     
     
         4 . The device according to  claim 1 , wherein in case the device is intended to heat either only liquid or liquid and room air, the control unit controls the conveying device such that liquid flows from the medium container to the medium line, and from the medium line to the medium container. 
     
     
         5 . The device according to  claim 1 , further comprising a fan for conveying the room air from the air inlet to the air outlet.