Solar water heater is a device that converts solar light energy into heat energy and heats water from low temperature to high temperature to meet people's hot water use in life and production. Solar water heaters are divided into vacuum tube solar water heaters and flat plate solar water heaters according to their structural forms, with vacuum tube solar water heaters as the main one, accounting for 95% of the domestic market share. This paper will introduce the installation method of water temperature and water level sensor of solar water heater.

Electric contact water level gauge

The installed water temperature and water level sensors are basically electric contact water level gauges, with several electrodes (some fixed on a hose) distributed at different heights inside the water tank. As long as the electrode is flooded, the water level gauge will know where the water is.

Top or side mounting

Water temperature and water level sensors can be installed from the top, side and bottom. Most top-mounted and side-mounted water temperature and water level sensors are universal. The simplest thing is to remove the original water pipe from the overflow port on the side of the water tank (the innermost horizontal pipe can be kept). Insert water temperature and water level sensors, leaving only a little behind the pole; If installing from the upper exhaust port, pay attention to the insertion depth, so that the height of the upper electrode is slightly lower than the overflow port.

Spillway insertion

Solar water heaters that need to install their own water temperature and water level sensors usually do not automatically fill with water. The upper water storage tank is communicated with the atmosphere. There is an air outlet at the top (covered with plastic cover) and an overflow at the side. The water pipe to see if the indoor water is full is connected to the overflow port.