System for mixing a chemical product with water

Phytosanitary product delivery system comprising a phytosanitary product mixing system for mixing a phytosanitary chemical product with water, comprising a water inlet port designed to be connected to a pressurized water supply pipe, a chemical product inlet port designed to be connected to a chemical product reservoir, and a mixture outlet port,

• wherein it comprises a main chamber in which a piston is movable and delimits an upstream part of the main chamber that is fluidically connected to the water inlet port and a downstream part of the main chamber that is connected to the chemical product inlet port,
• wherein the piston is provided with a rod extending into the downstream part of the main chamber, wherein the water inlet port is also connected to the mixture outlet port,
• wherein the downstream part of the main chamber is also connected to the mixture outlet port,
• wherein a water flow regulating device is interposed between the upstream part of the main chamber and the water inlet port,
• wherein the piston is movable in the main chamber under the action of water entering the upstream part of the main chamber and the pressure difference created by the rod of the piston in the downstream part of the main chamber, so that the chemical product contained in the downstream part of the main chamber is directed towards the mixture outlet port;
• wherein it comprises at least one of a garden hose and a spray nozzle connected to the mixture outlet port;
• and
• wherein the mixing system is arranged for operation in a plurality of operating modes and comprises a control member operable by a user to select a desired one of the operating modes of the system by controlling at least one valve arranged for regulating flows in the system of at least one of phytosanitary chemical product, water and a mixture of the phytosanitary chemical product and water;
• and
• wherein the plurality of operating modes comprise:
• a first mode for filling the main chamber with the phytosanitary chemical product;
• a second mode for mixing the phytosanitary product with water for output via the mixture outlet port;
• and
• a third mode for cleaning the system.