| The water heater is a new product that utilizes synthetically solar energy and electricity. This new kind of water heater is different either from that with the using of solar energy and from that with using of electricity, and it differs from the combining both of them simply. Actually, it can make two forms of energy complement each other by their characters and by taking full advantage of the regulation that the price is different during the different time. It is helpful for us to save the fee paid for the consumed electricity in the day when the crisis of energy is coming to me and the price of electricity is growing gradually.The controller is a key part of the water heater, which decides whether the goal can be attained.In this paper, the design of the controller's hardware and software is elaborately discussed, including the strategy of choosing apparatus, how to guarantee the precision of measure and stability of operating and the program matching the hardware.The design of the controller in this paper is a kind of simple and practical solution. The discussing in this thesis is for the purpose of giving a basic method of design and realizing this design. |
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