Informatization, digitization and networking are a major trend in the development of today’s human society. It is the world’s science and technology, and it is also a vision pursued by mankind. In the solar thermal utilization, what we need to master and monitor most is the operating temperature of the system, the water level of the water tank, the flow and direction of the hot water (working fluid) of the system, etc., and a few sets of monitoring parameters related to the working condition of the working fluid: and press The pre-set logic program controls a limited number of control and execution components such as the start and close of the circulating pump, the electric (magnetic) valve and the auxiliary energy system in a timely manner. Electronic sensor components are used to collect relevant information of solar energy equipment, and after calculation or logical processing of the collected data, it is displayed or transmitted to the control circuit; when the relevant information data is consistent with the requirements set by the control node, The controller sends out a circuit switch to open or close the actuator, so as to achieve the purpose of starting or terminating the operating state of the system. For a set of pure-purpose renewable energy collection and supply systems, letting the system’s operating conditions be completely in a state of insensitivity and isolation is no longer in line with the trend of the times. However, the icing on the cake to set too many virtual display functions does not explain the value of the product’s increased technological content and multi-functional practical use. It must be borne in mind that solar energy is a durable consumer product that needs to be exposed to broad daylight, subjected to the tests of perennial wind, sun, rain, frost, snow and freezing. The situation in the working environment of temperature and humidity is completely different. Among overly complex electronic circuit components, as long as one component fails early, it will have a negative impact on the reliability or quality reputation of the whole machine in the eyes of users, and even cause more negative reactions. Therefore, we have always advocated the choice of solar control system, all with the purpose of improving the system’s photothermal-photovoltaic conversion efficiency, and the necessary display and control of the man-machine interface should be limited to the real-time display of water temperature and water volume and temperature setting control as much as possible. Necessary and necessary within a small area, everything else is kept simple. There is no universal solar control device that is universal or applicable to any system. For indoor users can directly control the water source tap and sewage; the pipeline automatically delays the emptying of functional components such as antifreeze; intuitive manual valves should be used as far as possible; or physical means to achieve non-human automatic control. As a large-scale, popularized product used by thousands of households, the selection and design of the control system must be based on people-oriented, simple, practical, stable, single-selection, and long-life. For outdoor working power supplies and electronic components, it is appropriate to choose a photovoltaic power supply control device that is installed nearby and operates independently. For general non-professional users, there is no need to display and inform the running status of system logic automatic control. The part that needs to be left to the user to participate in the regulation must be necessary, simple, clear-targeted, single-choice, and obvious “dumb operation”. It should be noted that our users are not all experts in solar energy equipment, and should not leave any risk of misjudgment and misoperation. The flashy icing on the cake is often self-defeating, and the gains outweigh the gains. The effectiveness, reliability and stability of the system work are the primary goals pursued by solar energy equipment.
Take the residential controller of the high-rise building integrated floor network mutual benefit solar water heating system developed by the Kunming Nankai Energy Research Institute as an example: the anchor wall-mounted installation on the balconies of the residents on the upper two floors, or the integration of the natural circulation system above and below the window sill The sun set-water heater is designed and manufactured based on the above principles. Since the integrated components of the natural circulation system have fixed temperature replenishment at 50°C (±5°C): the low temperature below 5°C, the system will automatically reverse the sewage discharge and anti-freezing logic control function; therefore, except for an ultra-thin, ultra-light, and simple-structured solar set －Except for the water heater and the associated pipe joints, there are no spare parts that are redundant or need to be operated manually. The system’s constant temperature water supply controllers are all integrated into a control box behind an ultra-small photovoltaic panel embedded on the frame. The cold water is taken from the user near the installation site, but it has been equipped with an independent metering water meter. The up-to-standard hot water is directly transported across floors to the heat-preserving hot water storage tank on the next floor to be stored in the heat-preserving hot water storage tank on the next floor through the pre-buried dedicated heat-insulating hot water pipeline, and is supplied to the residents on the next floor. When the ambient temperature is below 5°C, the residual water in the plate that the plate core reversely drains will also automatically enter the thermal insulation water tank downstairs through a dedicated pipeline under the physical control of the delayed emptying system bleed and stop valve. The water tank system Responsible for full recovery and reuse after reheating. Although the system is installed on the balcony or window sill outdoors of the user’s home on a specific floor, it does it; 1. It does not occupy any effective indoor area of the household; 2. It does not require the user to participate in any control management; 3. Although it is used The household’s cold water, but the costs incurred will be accurately measured by the cold water meter, and then fully deducted from the household’s total utility water expenditure: 4. The installation of the equipment will hardly cause any interference to the user, let alone cause any Safety hazards or artificial conflicts between gains and losses.