Patent TW-201437568-A (TW)
Title: Energy-saving water heater
Inventor: WANG BEI-HAI
IPC: F24D17/00
Filed: 2013-03-21
Abstract: An energy-saving water heater is arranged to convert solar radiation energy into thermal energy to be used later. Firstly, a stainless steel corrugated pipe with a diameter of 1/2 and a length of 60 meters (advantages of the pipe are easy to bend so that each bend can be curved with the minimum radius, minimum resistance and not easy to precipitate, no chemical reaction to hurt human body) is fixed to a 4x6 stainless steel plate in a circuitous manner with new century insulation cotton board of 3/4 thickness attached to upper and bottom sides so that thermal energy collected therein is not easily dissipated. Water is filled up in the pipe (around 20 liters) and is subjected to direct irradiation by sunlight to make the water stored in the pipe become hot through conduction, accumulation and rising, a saturation temperature may achieve 60 degrees Celsius plug. Further, a twin timer is used to regulate the time of inletting and staying of water in the pipe and the flow rate of water, where the longer the staying time is, the higher the temperature will be and the longer the water inletting time is, the greater the amount of water accumulated will be. However, the amount of the inlet water is limited to only sufficient to expel the heated water inside the pipe completely into the insulation tank for completion of the process of cold and hot water exchange. The exchange may be carried out at a period of 30-40 minute for 20 liters water each time so that 200 liters water can be generated for a whole day. With a heater selectively included, output of constant temperature can be achieved for both summertime and wintertime to satisfy the timely need of a user or for the use in the early morning. Further, dual automatic and manual operation devices are provided so that the use of hot water can be achieved at the time of power failure or the place of no power at mountain or remote area provided there is a water supply that is sufficient to achieve the conditions of exchange of hot and cold waters. Further, collection and storage of heat are performed in a separated manner so that a heat collection board can be installed without the constrains of terrains and can be installed on for example a roof, a wall, or ground of a steel plate house or even at a site around a boiler of a factory where a heat source exists. Further, the heater and the insulation tank also can be arranged in a separated manner so that there is no need to purchase a heating device if there is already an existing a heater (for whatever brand it may be) so that the expenditure can be reduced. All the material used in the present invention is made of stainless steel and there is no dead space at any bend so that there will be no deposition and blockage. Except the possibility of malfunctioning of a control element, other components can be guaranteed for 10 year operation without failure and the price is cheap and affordable and enjoyable by every family for the purchase and energy can be saved for reducing the expense and also for carbon reduction to save the earth, allowing everyone to take showers everyday for keeping healthy and happy forever.