Method and apparatus for washing fruits and vegetables
View Patent ↗One embodiment of the present invention includes an apparatus for washing a product with a fluid. The tank may receive a plurality of product, such as fruits and vegetables, into the fluid and be configured to receive a moving conveyor, having a first end, a second end, a first section, and a second section. The conveyor may have a plurality of protruding panels being structured and arranged on the conveyor to push the product through the fluid in the tank and to lift the product from the fluid in the tank to the second end of the conveyor. At least one first nozzle may be positioned substantially above the conveyor and configured to deliver the fluid onto the product as the product is pushed by the plurality of panels. The fluid delivered from the at least one first nozzle may rotate the product in the fluid in the tank.
1. A method of washing a product in a fluid, the method comprising the steps of:
introducing a plurality of the product into a first end of a tank containing a quantity of the fluid;
propelling the product through a first distance from the first end of the tank toward a second end of the tank from which the product is extracted by using at least one first nozzle discharging the fluid, the product floating at a top surface of the fluid in the tank and being disposed at a first position in the tank as a result of being propelled through the first distance;
pushing the floating product through a second distance from the first position toward the second end of the tank by using a plurality of protruding panels connected to a moving conveyor, the plurality of protruding panels being substantially disposed in the fluid in the tank, a portion of each of the floating product protruding above the top surface of the fluid in the tank, the floating product being disposed at a second position in the tank as a result of being pushed through the second distance;
impacting the protruding portion of each of the product with a flow of the fluid from at least one second nozzle positioned between the first and second positions; and
extracting the product from the second end of the tank.
2. The method according to claim 1 , further comprising the step of delivering fresh water to the product from at least one third nozzle after the product are extracted from the second end of the tank.
3. The method according to claim 2 , further comprising the steps of:
removing a portion of the fluid from the tank through an overflow passage connected to the tank; and
collecting the portion of the fluid in a reservoir configured to receive the fluid from the overflow passage.
4. The method according to claim 3 , further comprising the step of filtering the portion of the fluid using at least one of a filter or a sieve positioned between the overflow passage and the reservoir.
5. The method according to claim 3 , further comprising the step of pumping the portion of the fluid from the reservoir to the at least one first nozzle and the at least one second nozzle.
6. The method according to claim 3 , further comprising the step of filtering the portion of the fluid using a filter positioned between the reservoir and at least one of the at least one first nozzle or the at least one second nozzle.
7. The method according to claim 1 , wherein the flow of fluid impacting the protruding portion of each of the plurality of product comprises at least one sheet of water oriented traverse to the movement direction of the floating product.
8. The method according to claim 1 , wherein the flow of fluid impacting the protruding portion of each of the plurality of products causes at least one of the floating product to rotate.
9. The method according to claim 1 , wherein:
the product are introduced into the first end of the tank in a continuous fashion; and
the at least one first nozzle propels the product to reduce the possibility of collision between product already floating in the tank and product being introduced into the first end of the tank.
10. The method according to claim 1 , wherein:
the at least one second nozzle comprises a plurality of arrays of second nozzles; and
each array of second nozzles generates a sheet of water oriented traverse to the movement direction of the floating product and configured to impact the protruding portions of the floating product.
11. The method according to claim 1 , further comprising capturing the product floating into the first position with a submerged inclined portion of the moving conveyor.
12. The method according to claim 11 , wherein the at least one first nozzle comprises a plurality of first nozzles distributed along the first end of the tank.