集熱器內流體，吸收太陽輻射熱，溫度升高密度變小往上升至儲水桶，儲水桶內

The fluid in the heat collector absorbs solar radiant heat, the temperature rises, the density becomes smaller, and it rises to the water storage barrel. The cooler water in the water storage barrel flows down to the heat collector, which generates natural convection circulation to heat the water in the water storage barrel. , Most of the natural circulation type is used in the natural circulation of small domestic hot water.

The fluid in the collector absorbs the solar radiation heat, the temperature rise density becomes smaller to the storage bucket, the cooler water in the bucket moves to the collector, produces a natural convection cycle and heats the water in the bucket, and the natural circulation is mostly used in the natural circulation of small domestic hot water.

The fluid in the heat collector absorbs the solar radiation heat. The temperature rises and the density decreases. The colder water in the water storage bucket flows down to the heat collector to generate natural convection circulation. The natural circulation type is mostly used in small domestic hot water natural circulation.<br>