| 摘要 |
The present invention relates to an instantaneous mixing device for injection/extraction cleaning machines and in particular to an instantaneous mixing device with a pre-spray functionality of the type equipped with at least one washing accessory ( 13 ) and/or at least one pre-washing accessory ( 30 ) connected at the outlet to a hydraulic circuit ( 20 ), the device ( 10 ) comprising: at least one spray pump ( 12 ) connected to the hydraulic circuit ( 20 ); at least one tank for water ( 15 ) and at least one tank for a chemical product ( 16 ), connected to the hydraulic circuit ( 20 ); at least one mixing element ( 14 ) with a Venturi effect connected downstream of the at least one water tank ( 15 ) and at least one tank for a chemical product ( 16 ). The at least one pre-washing element ( 30 ) preferably comprises a spray hole having greater dimensions with respect to the hole of the spray nozzle of the at least one washing accessory ( 13 ).
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