Sewage source heat pump heat exchanger with reverse cleaning function

The sewage source heat pump heat exchanger with the reverse cleaning function comprises a heat exchanger body, one end of the heat exchanger body is fixedly connected with a water inlet, the end, away from the water inlet, of the heat exchanger body is fixedly connected with a water outlet, and the end, away from the heat exchanger body, of the water inlet is fixedly connected with a first pipeline. A first electric three-way valve is fixedly installed at the end, away from the water inlet, of the first pipeline. According to the sewage source heat pump heat exchanger with the reverse cleaning function, through mutual cooperation of a first pipeline, a first electric three-way valve, a water inlet pipe, a second pipeline, a second electric three-way valve, a water outlet pipe, a third pipeline, a fourth pipeline, a fifth pipeline and a filter box, reverse cleaning of the interior of the heat exchanger body can be achieved; and only the first electric three-way valve and the second electric three-way valve nee