Solar water heaters are devices that use solar light heating principles to obtain hot water. With the development of science and technology, solar water heaters are popular with consumers because of their novel, environmentally friendly, energy-efficient and convenient nature, and the number of installations has increased every year. Our solar energy resources are abundant, especially in small and medium-sized towns and rural areas in the vast west, where households can almost see the shape of solar water heaters
For heat purposes, solar water heaters are used to be installed in well-soiled places on the roof, often at a higher height than the original mine-protected device on the building, which is completely exposed to lightning directness and which is connected to the interior with electric heating power lines and sensor signal lines, with a larger metal component and, in fact, the water heater becomes a flasher, with a significant potential safety hazard。
Structure composition of solar water heaters
Solar water heaters consist mainly of collectors, heat tanks, straight-on, connections and control components. Every year there are cloudy clouds and snows, as well as low-light weather in the winter, in which the main source of water is electricity heating, most solar water heaters have built-in electrical heating circuits and are connected to indoor power through power lines. In addition, in order to monitor the water levels of solar water heaters, water temperature and so forth, solar water heaters generally receive, export and display information, which is transmitted into the room through signal lines. Therefore, mine protection measures for solar water heaters should be considered in terms of their product characteristics。
Mine-proof basis for solar water heaters
Modern buildings are made of steel-condensed concrete structures, with flashers on the roof connected to steel bars inside the building, and when struck by lightning, lightning flows flow along these bars, spilling into the building's basic steel grid. In order to prevent electric shock incidents, the design code for low-voltage diffusion designs provides, using international standards, for the total level connection of buildings, local level connection and assistive level connection measures. Article 3. 3. 2 of the code for mine design of buildings (2010 edition) states that objects above the mine-protective belt, such as metal, shall be connected to the house-protective device; in the case of non-metals, they shall be protected by a flasher (fence needle), otherwise protected by a bolt-fixer and connected to the house-protective device. The purpose of this provision is to use lightning rods to intercept lightning and minimize the risk of the heater being struck. At the same time, the metal is connected to the house anti-mine device in preparation for the next stage of the level connection。
3. Solar water heater direct mine protection
Since solar energy is generally installed on roofs, this often results in water heaters not being protected by flashers. For reasons of personal and property safety, in accordance with paragraph 4. 5. 4 of the gb50057-2010 code of mine design for buildings, “electro-electric equipment without metal casings or shield shall be protected by flashers”. The direct mine-protective measures of solar water heaters are broadly divided into two types: one is a reliable electrical connection between the steel-structured stand of the water heater and the house-side anti-mine device, and the other is the special installation of flashers for solar water heaters。
The top of the solar water heater shall be at least below the maximum of 60 cm of a lightning rod or belt and shall remain safe at approximately 1 m from the needle or belt. If needles and belts on the roof do not meet the requirements, they shall be high (or fitted) and welded with the original needle, with a double weld not less than six times the diameter of the rod, which shall not be less than the specifications of the original needle, bearing the specifications. If the safety distance requirement cannot be met due to space limitations, at least high-level metal water tank casings, stands, etc. Of the roof solar water heater should be connected and welded to the mine-protected lower line. A number of solar water heaters are known to have only 0. 3 mm stainless steel plates in their water tanks, which cannot be used as a flasher directly, and can be considered for inclusion as a flasher at the edge of the frame for a greater than a certain length of the water tank and for reliable connection to the house safety net。
104. Solar water heater sensor mine protection
In the area of indoor sensor protection, all metal pipes, metal baths, metal heating pipes, etc., in the bathroom are connected to the local level tipboard, the power line shield is connected to the ground, the indoor wave protection unit is connected to the safe area, the work protection area is also connected to the local level tipboard, and the local level tipboard is connected to the primary level subboard. In addition, wave protections (spds) installed in solar water heaters need to match energy with those in the total distribution box. They are suitable for selecting secondary wave protections, as close as possible to the equipment in need of protection, preferably at the power supply point on the switch。
Specialized mine protection brand - same as towe
Mine-proofing of solar water heaters is simple and simple in principle, but the design and construction requirements are high. In order to ensure the quality of work and the safety of the person, products and services should be selected for an electrical brand that is of excessive quality and secure service. Also, since its establishment in 2001, towe has been focusing on the field of lightning protection, which is a leading technical enterprise in the chinese defence and mine industry. It works to provide its clients with a wide range of technologically advanced, safe and reliable mine-proof products and services, such as power surge protections, signal surge protection, industrial control and wind voltage voltage protections, lightning rods and off-site systems, etc., and specialized lightning protection products and services for over a million users。
In sum, solar energy is environmentally friendly and inexhaustible, and the safe use of solar water heaters does not make it impossible to ignore the mine-proof problem. Therefore, when installing solar water heaters, we should consider the combination of solar water heaters and buildings in a number of ways, adopting comprehensive mine-protective measures to effectively reduce the occurrence of thunderstorms and provide security for our lives。
