Heat-accumulating heater

Abstract

A heat-accumulating heater includes a powdery paraffinic latent heat storage substance sealed in a bag-shaped container. The bag-shaped container includes a plurality of inner container members formed of sheets impermeable to the heat storage substance and water and permeable to air. The inner container members are each received in one of first substantially rectangular outer container members made of rubber that are connected to each other in a row so as to be bendable relative to each other. An air layer is present between each inner container member and the corresponding first outer container member, thereby preventing the inner container member from being pressed against the first outer container member. The first outer container members are in turn received in a second outer container member made of cloth.

1 . A heat-accumulating heater comprising a container in the form of a bag and a paraffinic latent heat storage material in the form of powder that is sealed in said container, said container comprising an inner container member formed of at least one sheet, an outer container member covering said inner container member with an air layer disposed therebetween, said sheet forming said inner container member being impermeable to said latent heat storage substance and water and permeable to air. 
   
   
       2 . The heat-accumulating heater of  claim 1  wherein said outer container member is made of an elastomer. 
   
   
       3 . The heat-accumulating heater of  claim 1  wherein said latent heat storage material comprises porous powder particles impregnated with a paraffinic latent heat storage substance. 
   
   
       4 . The heat-accumulating heater of  claim 1  wherein said latent heat storage material comprises microcapsules containing a paraffinic latent heat storage substance. 
   
   
       5 . The heat-accumulating heater of  claim 1  wherein said sheet forming said inner container member comprises one of a synthetic resin sheet, a metal foil, and a metal-deposited synthetic resin sheet. 
   
   
       6 . The heat-accumulating heater of  claim 1  wherein said latent heat storage material comprises a paraffinic latent heat storage substance comprising a saturated hydrocarbon having a carbon number of 28 to 32 and capable of being heated to 60 to 70° C. 
   
   
       7 . The heat-accumulating heater of  claim 6  wherein said outer container member has such thermal insulating properties that the sensible temperature is adjustable to 40 to 43° C.