Electrically insulated air-conducting water heater

Abstract

Electric shock to a user has been a major concern for a conventional electric water heater installed in or near a bathroom. An electrically insulated air-conducting water heater utilizes electrically insulating hot air to indirectly heat water to avoid electric hazard to a user of an electric water heater. The present invention comprises an air pump unit, a heating and temperature control unit, and an air venting unit having a plurality of tiny air nozzles immersed in a water pool. Ambient air is collected by the air pump unit, heated in the heating and temperature control unit, and injected into a water pool through the air venting unit as a form of zillions of small hot bubbles to heat the water. Apart from serving as an electrically safe water heater, the present invention also functions as a hot-bubble sauna machine, bathroom body dryer, and air conditioner.

1 . An electrically insulated air-conducting water heater, which uses a plurality of hot air bubbles to heat water in a water pool, comprising
 an air pump unit including an air inlet to collect ambient air and then press forward the ambient air;.   a heating and temperature control unit connecting with the air pump unit to heat the ambient air pressed down by the air pump unit to form hot air; and   an air venting unit including a plurality of tiny air nozzles, immersed in the water pool, connecting with the heating and temperature control unit to receive the hot air via an air conduit, and releasing the hot air via the tiny air nozzles.   
     
     
         2 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the air venting unit includes an air-storage volume and a thermal conductive structure, and wherein the thermal conductive structure includes two opposite surfaces, one in contact with water and the other in contact with hot air. 
     
     
         3 . The electrically insulated air-conducting water heater according to  claim 2 , wherein the thermal conductive structure is arranged on one side of the air venting unit, facing down the bottom of a water pool. 
     
     
         4 . The electrically insulated air-conducting water heater according to  claim 2 , wherein the air venting unit includes at least one sucking disk on the surface facing the bottom of the water pool. 
     
     
         5 . The electrically insulated air-conducting water heater according to  claim 2 , wherein an air-impermeable plastic film partitions the air-storage volume into an upper heat transfer compartment and a lower heat transfer compartment, and wherein one side of the lower heat transfer compartment joins with the thermal conductive structure. 
     
     
         6 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the air venting unit includes a plurality of protrusions arranged on the upper surface thereof. 
     
     
         7 . The electrically insulated air-conducting water heater according to  claim 2 , wherein the thermal conductive structure is made of a material selected from a group consisting of metal, plastic, and rubber. 
     
     
         8 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the tiny air nozzles have aperture diameters between 1 and 1000 μm. 
     
     
         9 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the air inlet includes a filter arranged inside. 
     
     
         10 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the air conduit further includes at least one air outlet directly blowing the hot air to the space outside the water pool. 
     
     
         11 . The electrically insulated air-conducting water heater according to  claim 10 , wherein a plurality of air directing fins arranged in the air outlet to adjust and control the flow direction of the hot air. 
     
     
         12 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the heating and temperature control unit includes an electric heater to heat the air. 
     
     
         13 . The electrically insulated air-conducting water heater according to  claim 1 , wherein the heating and temperature control unit includes a temperature controller for a user to set the temperature of the air.