Heating apparatus for arranging under a table

Abstract

The invention relates to an electrical heating apparatus for arranging under a table, the heating apparatus comprising a housing, at least one electrically powered heat source arranged inside said housing, and heat shielding means comprised in the housing and having a plurality of through holes configured for allowing heat radiation from the electrically powered heat source to pass, wherein the heat shielding means comprises a layer of a material with a thermal conductivity lower than 2 [W·m −1 ·K −1 ], and wherein the inner surface of the heat shielding means is applied with a layer of heat radiation reflecting material configured for reflecting the heat radiated from the heat source back against the inner part of the housing.

1 . An electrical heating apparatus for arranging under a table, said heating apparatus comprising:
 a housing,   at least one electrically powered heat source arranged inside said housing, and   heat shielding means comprised in the housing and having a plurality of through holes configured for allowing heat radiation from the electrically powered heat source to pass,   wherein the heat shielding means comprises a layer of a material with a thermal conductivity lower than 2 [W·m −1 ·K −1 ], and   wherein the inner surface of the heat shielding means is applied with a layer of heat radiation reflecting material configured for reflecting the heat radiated from the heat source back against the inner part of the housing.   
     
     
         2 . An electrical heating apparatus according to  claim 1 , wherein said housing is configured for preventing heat radiation through the housing at one or more angular sections around a vertical axis. 
     
     
         3 . An electrical heating apparatus according to  claim 1 , wherein the electrical heating apparatus further comprises one or more inner heat radiation reflecting screens arranged inside said housing and being configured for reflecting heat radiation towards the heat shielding means. 
     
     
         4 . An electrical heating apparatus according to  claim 2 , wherein the electrical heating apparatus is configured for allowing heat emission from two predetermined angular sections of the heating apparatus, the two angular sections being substantial opposite to each other in the housing. 
     
     
         5 . An electrical heating apparatus according to  claim 1 , wherein the at least one electrically powered heat source is of a rated power between 100 W and 700 W. 
     
     
         6 . An electrical heating apparatus according to  claim 1 , wherein said layer of a material with a thermal conductivity lower than 2 [W·m −1 ·K −1 ] has a thermal conductivity lower than 0.5 [W·m −1 ·K −1 ]. 
     
     
         7 . An electrical heating apparatus according to  claim 1 , wherein said electrical heating apparatus comprises power connection means configured for power supply of one or more further heating apparatuses. 
     
     
         8 . An electrical heating apparatus according to  claim 1 , wherein said electrical heating apparatus facilitates support of a table top. 
     
     
         9 . An electrical heating apparatus according to  claim 1 , wherein said electrical heating apparatus is configured for being attached to the under surface of a table top without touching the ground. 
     
     
         10 . An electrical heating apparatus according to  claim 1 , wherein said electrical heating apparatus comprises sensor means configured for detecting the presence of one or more persons around the heating apparatus, and control means configured for controlling the heat source based on signals from said sensor means. 
     
     
         11 . An electrical heating apparatus according to  claim 1 , comprising data processing means for controlling the electrically powered heat source, wherein the data processing means facilitates regulation of the at least one electrically powered heat source to a value below its rated power. 
     
     
         12 . An electrical heating apparatus according to  claim 1 , wherein said heat shielding means during operation will not be heated to a temperature above. 
     
     
         13 . An electrical heating apparatus according to  claim 1 , wherein said housing has a diameter of no more than 0.3 meters. 
     
     
         14 . An electrical heating apparatus according to  claim 1 , wherein said layer of heat radiation reflecting material has a reflection coefficient ρ of infrared radiation in the range of 0.6 to 1. 
     
     
         15 . An electrical heating apparatus according to  claim 1 , wherein said housing and said heat shielding means together forms a substantially circular shaped heating apparatus seen from above. 
     
     
         16 . An electrical heating apparatus according to  claim 1 , wherein said heating apparatus is adapted to facilitate a flow of air from the outside of the housing, through one or more inlets into the housing, through the inside of the housing, and out through one or more outlets of the housing. 
     
     
         17 . An electrical heating apparatus according to  claim 16 , wherein the said inlet(s) and outlet(s) are arranged to facilitate that the flow of air is driven by a stack effect. 
     
     
         18 . An electrical heating apparatus according to  claim 16 , wherein said outlet(s) are arranged at the upper part of the heating apparatus. 
     
     
         19 . An electrical heating apparatus according to  claim 16 , wherein said inlet(s) and/or said outlet(s) comprises one or more through holes in the side of the housing. 
     
     
         20 . An electrical heating apparatus according to  claim 16 , wherein said inlet(s) are the plurality of through holes of the heat shielding means.