Device for heating room air and a liquid

Abstract

The present disclosure relates to a device for heating room air and a liquid. A heat exchanger transfers thermal energy to the liquid present in a medium line. A medium tank takes up liquid and air, and a conveying device moves liquid and air from the medium tank to the medium line. In the event that only room air is to be heated in an air mode, air is moved from an air cushion in the medium tank through the medium line. The pumping capacity of the conveying device is monitored.

1 . A device for heating room air and a liquid, comprising:
 an energy unit, a heat exchanger, a medium tank, a medium line, a conveying device and a control unit,   wherein the energy unit generates thermal energy,   wherein the heat exchanger transfers the thermal energy generated by the energy unit to the room air and the liquid,   wherein the medium tank serves to take up liquid and air,   wherein the medium line serves to conduct liquid and air,   wherein the heat exchanger and the medium line are configured and arranged relative to each other such that the heat exchanger transfers thermal energy to liquid present in the medium line,   wherein the conveying device serves to move liquid and air from the medium tank to the medium line,   wherein the control unit controls the conveying device,   wherein in the event that the device is intended to heat only room air in an air mode, the control unit controls the conveying device in a preparatory step such that the conveying device moves air from an air cushion in the medium tank through the medium line, and   wherein the control unit monitors a pumping behavior of the conveying device.   
     
     
         2 . The device according to  claim 1 ,
 wherein the medium tank has a liquid outlet for draining the liquid and an air inlet for admitting air,   wherein a drain valve is assigned to the liquid outlet, and   wherein in the event that an amount of air conveyed by the conveying device is below a set value during the preparatory step, the control unit controls the drain valve such that liquid flows out of the medium tank via the liquid outlet.   
     
     
         3 . The device according to  claim 1 ,
 wherein an air valve is assigned to the air inlet, and   wherein the air valve is configured such that the air valve opens the air inlet for air when a pressure in the medium tank is below a pressure of the air outside the medium tank.   
     
     
         4 . The device according to  claim 3 ,
 wherein the air valve is configured as a ventilation valve.   
     
     
         5 . The device according to  claim 1 ,
 wherein an air valve is assigned to the air inlet, and   
       wherein in the event that the amount of air conveyed by the conveying device is below the set value during the preparatory step, the control unit controls the air valve such that air enters the medium tank via the air inlet. 
     
     
         6 . The device according to  claim 1 ,
 wherein the medium tank has a liquid inlet,   wherein a supply valve is assigned to the liquid inlet, and   wherein in the event that the amount of air conveyed by the conveying device is below the set value during the preparatory step, the control unit closes the supply valve.   
     
     
         7 . The device according to  claim 1 ,
 wherein the control unit monitors the pumping behavior of the conveying device in that the control unit evaluates a current consumption of the conveying device.   
     
     
         8 . The device according to  claim 7 ,
 wherein the control unit evaluates a decrease in the current consumption of the conveying device as meaning that the conveying device conveys air.   
     
     
         9 . The device according to  claim 1 ,
 wherein in the event that the device is intended to heat only liquid or liquid and room air, the control unit controls the conveying device such that liquid flows out of the medium tank to the medium line, and from the medium line to the medium tank.   
     
     
         10 . The device according to  claim 1 ,
 wherein the device further includes a fan for conveying the room air from an air input to an air output.