PROBLEM TO BE SOLVED: To provide a compact dissolving device with low operating cost for supplying inorganic compound or the like without requiring any electric circuit, and to provide a water heater with the same.SOLUTION: The dissolving device includes a water circuit 15, and an accommodation unit 12 for accommodating an inorganic compound 11 that is a powdery compound, a granular compound, or the mixture of a powdery compound and a granular compound. The dissolving device is provided for dissolving the inorganic compound 11 accommodated in the accommodation unit 12 in the water flowing in the water circuit 15. The dissolving device is configured to dissolve the inorganic compound in the water by taking advantage of the principle of substance diffusion (the law of Fick) where the difference in dissolution concentration between water and an inorganic compound moves a substance.COPYRIGHT: (C)2012,JPO&INPIT【課題】電気回路を必要とせず、コンパクトで運転コストが安価な無機化合物等を供給する溶解装置及びそれを備えた給湯装置を提供すること。【解決手段】水回路15と、粉末状または顆粒状、あるいは、粉末状と顆粒状との混合物である無機化合物11を収納する収納手段12とを備え、前記水回路15を流れる水に、前記収納手段12に収納された無機化合物11を溶解させる構成としたことを特徴とする溶解装置で、水と無機化合物の間の溶解濃度差で物質が移動する、物質拡散(フィックの法則)の原理で、水に無機化合物を溶解させる。【選択図】図1
