Ground-source heat pump system using rainwater as heat exchange medium

The invention discloses a ground-source heat pump system using rainwater as a heat exchange medium, and belongs to the field of ground-source heat pump systems. According to the scheme of the ground-source heat pump system using the rainwater as the heat exchange medium, the rainwater is purified by utilizing elastic fiber clusters, the rainwater flow is slowed down and shunted by utilizing the elastic fiber clusters which form a plurality of compartments which communicate with each other through mutual twisting, the capability of wrapping silt is reduced, the silt separated from the rainwaterflow can be captured by the compartments and is difficult to flow to the heat exchange area of a ground-source heat pump along with the water flow, a housing of a purification device is filled with afilling ball so as to increase the stability of the elastic fiber clusters, so that the elastic fiber clusters are difficult to deform under the continuous washing of the rainwater flow, the rainwater can be dedusted and puri