Solar linkage conversion device and water heater system

The utility model discloses a solar linkage conversion device. Characterized in that it is characterized in that it comprises, housing comprising: a housing, wherein the solar water heater water outlet pipe connector, the gas water heater water inlet pipe connector, the gas water heater water outlet pipe connector, the user hot water supply pipeline, the three-way assembly, the temperature sensorand the controller are installed on the shell. The solar water heater water outlet pipe connector, the gas water heater water inlet pipe connector and the user hot water supply pipeline are connectedthrough the three-way assembly. The gas water heater water outlet pipe connector is connected with the hot water supply pipeline used by the user through a pipeline, the temperature sensor is connected with the solar water heater water outlet pipe connector, and the controller controls the three-way assembly to reverse according to signals fed back by the temperature sensor. According to the linkage conversion device, a co