CN106724960B

CN106724960B - Cavitation oxygenation type fruit and vegetable cleaning machine

Info

Publication number: CN106724960B
Application number: CN201611197328.2A
Authority: CN
Inventors: 李晓俊; 张少峰; 朱祖超; 李昳
Original assignee: Zhejiang Sci Tech University ZSTU
Current assignee: Zhejiang Sci Tech University ZSTU
Priority date: 2016-12-22
Filing date: 2016-12-22
Publication date: 2023-07-04
Anticipated expiration: 2036-12-22
Also published as: CN106724960A

Abstract

The invention relates to a cavitation oxygenation type fruit and vegetable cleaning machine. The purpose is that the cleaning machine that provides should have that the cleaning effect is good, cleaning efficiency is high, disinfect and disinfect effectually, resources are saved's characteristics. The technical proposal is as follows: a cavitation oxygenation type fruit and vegetable cleaning machine comprises a washing barrel with an open top end, a washing basket which can be positioned in the washing barrel in a rotating way around a vertical axis, and a power mechanism which drives the washing basket through a transmission mechanism; the method is characterized in that: the washing barrel is internally provided with a cavitation mechanism which is driven by a power mechanism and can generate cavitation bubbles in washing liquid, and an aeration stone for providing ozone for the cavitation component; the cavitation assembly comprises a disc-shaped stator and rotor, and an impeller rotatably positioned between the stator and rotor; the axes of the stator and the rotor are all vertical and coaxially arranged.

Description

Cavitation oxygenation type fruit and vegetable cleaning machine

Technical Field

The invention relates to the field of household food cleaning, in particular to a cavitation oxygenation type fruit and vegetable cleaning machine.

Background

The fruit and vegetable cleaning machine on the market generally supplies ozone into the basket through the aerated stone and dissolves the ozone into water through the water circulation technology. However, due to the poor oxygen dissolving effect of the water circulation technology, the cleaning efficiency is low, the effects of sterilizing and disinfecting by ozone and removing pesticides and heavy metals on the surfaces of fruits and vegetables are not obvious, the expected cleaning effect is not achieved, and the resource waste is caused.

Disclosure of Invention

The invention aims to overcome the defects of the background technology and provide the cavitation oxygenation type fruit and vegetable cleaning machine which has the characteristics of good cleaning effect, high cleaning efficiency, good sterilization and disinfection effects and resource conservation.

The invention adopts the following technical scheme:

a cavitation oxygenation type fruit and vegetable cleaning machine comprises a washing barrel with an open top end, a washing basket which can be positioned in the washing barrel in a rotating way around a vertical axis, and a power mechanism which drives the washing basket through a transmission mechanism; the method is characterized in that: the washing barrel is internally provided with a cavitation mechanism which is driven by a power mechanism and can generate cavitation bubbles in washing liquid, and an aeration stone for providing ozone for the cavitation component;

the cavitation assembly comprises a disc-shaped stator and rotor, and an impeller rotatably positioned between the stator and rotor; the axes of the stator and the rotor are all vertical and coaxially arranged.

The stator is provided with a plurality of stator blade teeth protruding out of the end face towards the end face of the rotor, and the stator blade teeth are uniformly distributed on one side close to the outer edge; the end face of the rotor, which faces the stator, is also provided with a plurality of movable blade teeth protruding out of the end face, and the movable blade teeth are uniformly distributed on one side close to the outer edge and correspond to the stationary blade teeth; the impeller is positioned between the movable vane teeth and the axis and is fixedly connected with the rotor.

The side of the stator blade teeth facing the rotor is a wedge-shaped groove, the deeper end of the wedge-shaped groove is directly communicated with the side surface of the stator blade teeth, and the side surface is opposite to the adjacent stator blade teeth; the movable blade teeth are rectangular blocks with the outline corresponding to the outline of the stationary blade gear; the wedge-shaped grooves and the movable blade teeth form a relative contraction flow passage by means of relative movement of the rotor and the stator.

The ozone outlet of the aeration stone is positioned on the end face of the stator, which is back to the blade teeth.

A certain interval is arranged between the movable blade teeth and the static blade teeth, and the interval is preferably 0.5-1.5mm.

The inclination angle between the bottom surface and the end surface of the wedge-shaped groove is 5-15 degrees.

The transmission mechanism comprises two pairs of bevel gears driven by the gear set.

The power mechanism is a motor.

The working principle of the invention is as follows:

the high-speed shear flow generated by the relative rotation of the stator and the rotor can reduce the pressure of a local area, so that the medium in the area is gasified to generate bubbles (the relative movement of the rotor 3 and the stator 5 forms wedge cavitation, and the high-speed rotation of the rotor 3 forms cavitation of the front edge of the rotor blade and cavitation of the low-pressure area of the tail end of the rotor blade). Ozone emitted by the air outlet boss is continuously sucked by the impeller which rotates rapidly, and the sucked ozone can act as cavitation gas nuclei, so that cavitation of water in the stator and rotor cavities is promoted. The impeller rotates rapidly, so that water containing cavitation bubbles in the cavities of the stator and the rotor is continuously thrown out from a gap between the stator and the rotor due to the action of centrifugal force, and the local instantaneous high pressure released when the cavitation bubbles in the thrown water collapse near the surfaces of fruits and vegetables can promote the dissolution of ozone, improve the dissolution rate of ozone and improve the cleaning effect. The cavitation bubbles are crushed continuously by the blade teeth on the rotor and the blade teeth with wedge-shaped grooves on the stator, so that the contact area of ozone and water is increased.

The driving motor enables the washing basket and the rotor to rotate around opposite directions through the gear transmission mechanism, so that water in the washing barrel flows more severely, bubbles entering the washing basket are further broken, and the contact area of ozone and water is further increased.

The beneficial effects of the invention are as follows: the provided cleaning machine adopts the water jet containing cavitation bubbles to clean, so that the cleaning machine has larger capacity of degrading an object surface, the local instantaneous high pressure released during collapse of the cavitation bubbles can obviously improve the cleaning effect and the cleaning efficiency, and the ozone-containing water flow has good sterilization and disinfection effects, and has the advantages of less water consumption and resource conservation.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of the mechanism of the present invention.

Fig. 2 is an enlarged schematic view of the portion a in fig. 1.

Fig. 3 is an enlarged schematic view of the portion B in fig. 1.

Fig. 4 is a schematic three-dimensional structure of a stator according to the present invention.

Fig. 5 is a schematic three-dimensional structure of a rotor according to the present invention.

Fig. 6 is a schematic view of the three-dimensional structure of the impeller of the present invention.

FIG. 7 is a schematic three-dimensional structure of the hollow module of the present invention.

The labels in the figures are as follows:

1. a washing basket; 2. a washing tub; 3. a rotor; 4. an impeller; 5. a stator; 6. a fixed rod; 7. a bevel gear; 8. a bevel gear; 9. a cylindrical gear; 10. aerated stone; 11. a cylindrical gear; 12. a gear box; 13. a bevel gear; 14. a driving motor; 15. a bevel gear; 16. a body; 17. a water outlet; 18. a metal cover plate; 19. a seal ring; 20. a large stepped shaft; 21. a gasket; 22. a thrust bearing; 23. an air outlet boss; 24. a seal ring; 25. a gasket; 26. a small stepped shaft; 27. and (3) sealing rings.

Detailed Description

The invention adopts hydrodynamic ventilation cavitation cleaning, as cavitation bubbles in water flow have strong cavitation effect on an object surface, such as cavitation bubbles can be induced in water jet to generate water jet with cavitation bubbles, when the water jet is impacted on the object surface, the capacity of degrading the object surface is larger than that of cavitation-free water jet, and local instantaneous high pressure released when cavitation bubbles collapse is used for cleaning, so that the dissolution rate of ozone can be improved, and the cleaning effect can be improved; compared with the traditional cleaning, the cavitation cleaning has the advantages of high cleaning efficiency, good cleaning effect, wide application range, high safety performance and the like.

In addition, aeration cavitation is the promotion of cavitation by increasing the number of cavitation nuclei in the water. Cavitation cleaning is an application of cavitation water treatment, and main methods of cavitation water treatment are ultrasonic cavitation and hydrodynamic cavitation, wherein the former method has been widely and carefully studied. However, at present, the ultrasonic cavitation water treatment technology still has the defects of high energy consumption and expensive equipment, most researches are still at laboratory level, and the application of the ultrasonic cavitation water treatment technology in industrialization and industrialization is still less. Compared with ultrasonic cavitation, the hydrodynamic cavitation is gradually a novel cavitation water treatment method due to the characteristics of easiness in realization and far higher efficiency than the former.

The invention will be described in further detail with reference to the drawings and the specific embodiments, but the scope of the invention is not limited thereto.

In the aeration cavitation type fruit and vegetable cleaning machine shown in fig. 1; the washing basket 1 filled with fruits and vegetables is sleeved on a shaft end spline of a large stepped shaft 20 (which is rotatably and vertically positioned in the washing barrel through a bearing), so that the large stepped shaft 20 drives the large stepped shaft to rotate together; the large stepped shaft is also sleeved with a thrust bearing 20, so that the pressure of the bevel gear to the gearbox can be relieved, and a gasket 21 (shown in fig. 2) is arranged between the large stepped shaft and the thrust bearing 22.

The cavitation assembly comprises a stator 5 and a rotor 3 (both of which are disc-shaped) arranged with their axes vertical and coaxially, and an impeller 4 rotatably positioned between the stator and the rotor; the stator is provided with a plurality of stator blade teeth 5-1 (10 are shown in the figure, and the number of the stator blade teeth can be determined according to the requirement) protruding from the end face towards the end face 5-3 of the rotor, and the stator blade teeth are uniformly distributed on one side close to the outer edge (namely one side close to the outer circumferential surface); the end face 3-3 of the rotor facing the stator is also provided with a plurality of movable blade teeth 3-1 (generally, the number of teeth of the stator is consistent with that of teeth of the stator) protruding out of the end face, and the movable blade teeth are uniformly distributed on one side close to the outer edge and correspond to the stator teeth; a space is formed among the movable blade teeth, the stationary blade teeth, the stator end face and the rotor end face, the impeller is positioned in the space and fixedly connected with the rotor (the impeller is fixed on the end face of the rotor; four through holes are formed in the rotor positioned on the upper side of the stator in the drawing, four corresponding screw holes are formed in the impeller 4, and the impeller and the rotor are fixedly connected through screws. A certain interval is arranged between the movable blade teeth and the static blade teeth, and the interval is preferably 0.5-1.5mm. The surface of the stator blade facing the rotor is a wedge-shaped groove, and the inclined angle between the bottom surface 5-1-1 and the end surface 5-3 of the wedge-shaped groove is between 5 degrees and 15 degrees; the deeper end of the wedge-shaped groove is directly communicated with the side surface 5-1-2 of the stator blade tooth, and the side surface is opposite to the adjacent stator blade tooth (when the rotor driving water flow enters from the deeper end of the wedge-shaped groove and then flows out from the shallower end of the wedge-shaped groove in operation); the movable blade teeth are rectangular blocks with the outline corresponding to the outline of the stationary blade gear; the wedge-shaped grooves and the movable blade teeth form a relative contraction flow passage by means of relative movement of the rotor and the stator.

The stator 5 is fixedly connected with the washing barrel 2 through a fixed rod 6; the small stepped shaft 26 is also rotatably and vertically positioned in the washing tub through a bearing, the impeller (the rotor 3 is fixedly connected with the small stepped shaft 26 through a screw structure) is fixed at the top end of the small stepped shaft, and a gasket 25 (shown in fig. 3) for preventing the small stepped shaft 26 from moving upwards is arranged between the small stepped shaft and the metal cover plate 18. Ozone generated by the aeration stone 10 is emitted through the air outlet boss 23 (namely an ozone outlet, and the end surface opposite to the stator and facing away from the blade teeth), and the emitted ozone is rapidly sucked by the impeller 4 which rotates rapidly; the sucked ozone acts as cavitation nuclei, promoting cavitation in the cavities of the rotor 3 and the stator 5. The drive motor 14 is transmitted to two pairs of bevel gear sets (

bevel gears

7, 8, 13, 15) through a pair of gear sets (cylindrical gears 9 and 11 positioned in the gear case 12), respectively to a large stepped shaft and a small stepped shaft; the washing basket 1 and the rotor 3 rotate around two opposite directions, so that water in the washing barrel flows more severely, and the washing effect is better; the gear case 12 is fixedly connected with the machine body 16 by four screws. After the washing is completed, the washing water may be discharged from the water outlet 17.

The upper and lower surfaces of the connection part of the washing basket 1 and the large stepped shaft 20 are provided with metal gaskets, the shape of the inner hole of each metal gasket is the same as the section shape of the spline shaft end, and the two metal gaskets are fixed on the upper and lower surfaces of the bottom end of the washing basket by four bolts.

The cylindrical gear and the conical gear both adopt straight tooth structures.

A heat dissipation window is formed in the bottom of the machine body 16, so that the driving motor 14 is prevented from being excessively high in temperature;

the rotational speed of the rotor 3 is specifically calculated by the following method:

the actual flow Q of the cavitation device is 4-8% of the volume of the washing barrel;

wherein K=3.8-4.5, Q is the actual flow, D is the diameter of the inner hole of the stator, and n is the rotating speed of the rotor 3.

The rotation speed of the rotor can be obtained by the calculation formula, and the rotation speed of the driving motor is determined by the transmission ratio of the gears, so that the driving motor with proper power is determined.

The examples are embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.

Claims

1. A cavitation oxygenation type fruit and vegetable cleaning machine comprises a washing barrel (2) with an open top end, a washing basket (1) which can be positioned in the washing barrel in a rotating way around a vertical axis, and a power mechanism which drives the washing basket through a transmission mechanism; the method is characterized in that: the washing barrel is internally provided with a cavitation mechanism which is driven by a power mechanism and can generate cavitation bubbles in washing liquid, and an aeration stone (10) for providing ozone for the cavitation component is arranged;

the cavitation assembly comprises a disc-shaped stator (5) and a rotor (3), and an impeller (4) rotatably positioned between the stator and the rotor; the axes of the stator and the rotor are vertical and are coaxially arranged;

the stator is provided with a plurality of stator blade teeth (5-1) protruding from the end face towards the end face of the rotor, and the stator blade teeth are uniformly distributed on one side close to the outer edge; the end face of the rotor, which faces the stator, is also provided with a plurality of movable blade teeth (3-1) protruding out of the end face, and the movable blade teeth are uniformly distributed on one side close to the outer edge and correspond to the stationary blade teeth; the impeller is positioned between the movable blade teeth and the axis and is fixedly connected with the rotor;

2. The cavitation and oxygenation type fruit and vegetable cleaning machine according to claim 1, wherein: the surface of the stator blade teeth facing the rotor is a wedge-shaped groove, the deeper end of the wedge-shaped groove is directly communicated with the side surface (5-1-2) of the stator blade teeth, and the side surface is opposite to the adjacent stator blade teeth; the movable blade teeth are rectangular blocks with the outline corresponding to the outline of the stationary blade gear; the wedge-shaped grooves and the movable blade teeth form a relative contraction flow passage by means of relative movement of the rotor and the stator.

3. The cavitation and oxygenation type fruit and vegetable cleaning machine according to claim 2, wherein: a certain interval is reserved between the movable blade teeth and the static blade teeth, and the interval is 0.5-1.5mm.

4. A cavitation and oxygenation type fruit and vegetable cleaning machine according to claim 3, wherein: the inclination angle between the bottom surface (5-1-1) and the end surface (5-3) of the wedge-shaped groove is 5-15 degrees.

5. The cavitation and oxygenation type fruit and vegetable cleaning machine according to claim 4, wherein: the transmission mechanism comprises two pairs of bevel gears driven by the gear set.

6. The cavitation and oxygenation type fruit and vegetable cleaning machine according to claim 5, wherein: the power mechanism is a motor.