CN112135044B

CN112135044B - Food material purifying machine

Info

Publication number: CN112135044B
Application number: CN202010998876.5A
Authority: CN
Inventors: 林盛增
Original assignee: Zhejiang Jiudian Health Technology Co ltd
Current assignee: Zhejiang Jiudian Health Technology Co ltd
Priority date: 2020-09-22
Filing date: 2020-09-22
Publication date: 2022-05-13
Anticipated expiration: 2040-09-22
Also published as: CN112135044A; CN114697552A

Abstract

The invention provides a food material purifier and a control method thereof. Meanwhile, the liquid level meter of the purifier is provided with an inclined liquid level detection groove, so that the interference of food materials on liquid level detection can be prevented while the water level of the inner barrel is detected.

Description

Food material purifying machine

Technical Field

The invention relates to the field of food material purifiers, in particular to a food material purifier capable of purifying food materials.

Background

Along with the improvement of the living standard of people, the food material purifying machine used in a kitchen appears in the prior art, and the food material purifying machine can clean vegetables, fruits and the like eaten by families so as to guarantee the health of users. For example, chinese utility model patent CN203153499U discloses a food material washing machine, which includes an ozone generator, obtains ozone water of high-concentration micro-bubble ozone, and sterilizes food materials, but this food material washing machine does not consider the harm of ozone to human health, and the cleaning ability of a single sterilization mode to food materials is low; CN208875365U discloses a food material clearing machine based on ultrasonic wave, water hydroxyl technology is washd, after the ultrasonic wave high frequency vibrations work through supersonic generator, get rid of silt and filth on fruit vegetables surface, the disinfection of water hydroxyl technology of rethread membrane electrode module is gone out to kill fruit vegetables bacterium and decomposition hormone, reaches the purification performance that the food material disinfected the disinfection, but this kind of clearing machine starts ultrasonic cleaning earlier, later releases hydroxyl, only stops in the simple stack state of two kinds of clean effects to the cleaning effect of food material, still can not reach satisfied state. Chinese utility model patent CN210782841U discloses a be used for abluent pesticide residue remove device of vegetables, ozone generator, supersonic generator and diamond electrolytic device have been set up, its during operation ultrasonic emission high frequency ultrasonic wave, water flows through ozone generator and diamond electrolytic device in proper order simultaneously, diamond electrolytic device has decomposed the produced ozone of ozone generator and has produced hydroxyl, therefore the three simultaneous working, such shortcoming is that three kinds of devices lack unified control, ozone generator still constantly produces ozone after the hydroxyl concentration of aquatic risees, cause the ozone concentration of aquatic too high and spread in the air easily, harm human health.

In addition, ozone may cause pollution to air and further harm human health, and the ultrasonic cleaning for too long time may damage the quality of the food material, so if more dirt remains on the surface of the food material, the food material purifier needs larger cleaning power, and if less dirt remains on the surface of the food material, or the cleaning effect is better, the food material purifier does not need to release more substances such as ozone and hydroxyl for cleaning, and the ultrasonic cleaning for a long time is not needed, so as to avoid causing pollution or damaging the food material. The existing food material purifying machine cannot evaluate the cleaning effect on food materials, cannot adjust the cleaning power according to the cleaning effect on the food materials, and is low in level of intellectualization and automation.

Disclosure of Invention

The invention provides a food material purifier capable of evaluating the degree of food material cleaning, which comprises a shell and an inner barrel, wherein the inner barrel is arranged in the shell and used for placing food materials to be cleaned, a gap is formed between the shell and the inner barrel, the gap comprises a bottom equipment space and a side equipment space, and the bottom equipment space and the side equipment space are used for installing internal equipment of the food material purifier. The bottom of the inner barrel is provided with a water outlet which is connected with a water discharge pipe and used for discharging the waste water in the inner barrel, and the water discharge pipe is provided with a water discharge valve. And an ultrasonic transmitter is arranged on one side of the water outlet, and the transmitting end of the ultrasonic transmitter faces the inner barrel and is used for transmitting ultrasonic waves to the inside of the inner barrel. An ozone water outlet and a hydroxyl water outlet are formed in the other side of the water outlet, an ozone water device and a hydroxyl water device are installed in the bottom equipment space, ozone water generated by the ozone water device is discharged into the inner barrel through the ozone water outlet, and hydroxyl water generated by the hydroxyl water device is discharged into the inner barrel through the hydroxyl water outlet.

The lateral equipment space is also provided with a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, the water inlet pipe is connected with an ozone water device, when the water inlet valve is opened, an external water source enters the ozone water device through the water inlet pipe, the ozone water device generates ozone molecules, and the ozone molecules are dissolved in water to form ozone water and are discharged into the inner barrel from an ozone water outlet. The hydroxyl water device is communicated with the inner barrel through a hydroxyl water outlet, and the hydroxyl water device generates hydroxyl radicals through the electrolysis equipment and circulates the generated hydroxyl water into the inner barrel through the hydroxyl water outlet.

The inner barrel is characterized in that a liquid level meter is further arranged on the inner wall of the inner barrel, the liquid level meter can adopt an ultrasonic liquid level meter or a differential pressure liquid level meter, and the liquid level meter is used for detecting the height of the water level in the inner barrel and sending a liquid level signal to the main control panel.

Further, what this application adopted the level gauge adopts capacitanc level gauge, capacitanc level gauge includes that the liquid level detects groove, upper polar plate, bottom plate, electric capacity detecting element and liquid level detecting element. A liquid level detection groove is arranged at the set height of the side wall of the inner barrel, the set height is determined by the allowable water level height of the inner barrel, the liquid level detection tank is deflected upwards by a certain angle theta relative to the horizontal plane, the liquid level detection tank is provided with an upper detection surface and a lower detection surface, the height of the upper detection surface and the lower detection surface can be set to be 2-3 cm, the upper surface of the upper detection surface is provided with an upper polar plate, the lower surface of the lower detection surface is provided with a lower polar plate, the upper polar plate and the lower polar plate are oppositely arranged, the upper and lower polar plates are insulated from each other, and the capacitance between the upper and lower polar plates is detected by the capacitance measuring unit, and sends the capacitance value to a liquid level detection unit, which compares the capacitance value with a preset capacitance value, the preset capacitance value is the capacitance between the upper and lower pole plates when no water exists in the detection tank, and a liquid level signal is generated according to a comparison result and sent to the main control board.

Furthermore, in order to prevent food materials in the inner barrel from entering the detection groove to interfere with the capacitance detection unit, a blocking plate is vertically arranged at the upper end of a notch of the liquid level detection groove, a liquid inlet is formed between the blocking plate and the lower end of the notch of the liquid level detection groove, the height of the liquid inlet can be set to be 0.2-0.5 cm, the blocking plate can prevent the food materials from entering the liquid level detection groove to cause interference, and the liquid level detection groove is obliquely arranged to enable water in the liquid level detection groove to be completely discharged under the action of gravity and not to be retained in the liquid level detection groove during drainage. When the water inlet pipe enters the inner barrel, the water level inside the inner barrel rises continuously and enters the liquid level detection groove from the liquid inlet. When no water exists in the liquid level detection tank, the capacitor between the upper polar plate and the lower polar plate is a first capacitor, the liquid level detection unit compares the first capacitor with a preset capacitance value, the difference value of the first capacitor and the preset capacitance value is within an allowable range, and the liquid level detection unit generates a first liquid level signal; after the liquid level detection tank is filled with water, the difference exists between the dielectric constant of tap water and air, so that the capacitance between the upper and lower polar plates can be obviously changed, a second capacitance is generated, the liquid level detection unit compares the second capacitance with a preset capacitance value, the difference value between the second capacitance and the preset capacitance value exceeds an allowable range, and the liquid level detection unit generates a second liquid level signal. And the main control board receives the first liquid level signal to indicate that no water exists in the inner barrel or the water level is not full at present, and receives the second liquid level signal to indicate that the water level in the inner barrel reaches the preset water level, and the water inlet is stopped.

The water inlet valve and the water discharge valve are controllable electromagnetic valves and are electrically connected with the main control board, and the main control board can control the opening and closing of the water inlet valve and the water discharge valve.

The upper surface of the shell of the food material purifier comprises an upper cover and a control area, wherein the upper cover can be opened and food materials can be taken and placed from an inner barrel. The upper cover is provided with a display screen, and the control area comprises a control display and control keys. The inner side of the upper cover is provided with a camera module and a lighting module, the camera module is used for imaging food materials in the inner barrel and sending food material images to the main control board, and the lighting module is used for providing a lighting source for the camera module. The display screen, the control keys, the control display, the lighting module and the camera module are electrically connected with the main control panel.

Specifically, the camera module is a visible light and infrared light dual-mode lens, the camera module comprises a dichroic mirror, a visible light camera arranged above the dichroic mirror and along a vertical optical axis, and an infrared light camera arranged on the side of the dichroic mirror and along a horizontal optical axis, and a blue light source and an infrared light source are further respectively arranged on two sides of the dichroic mirror, for example, an arrangement mode of an annular linear light source or an annular multi-point light source is adopted, the lower end of the dichroic mirror faces the inside of the inner barrel, and the blue light source and the infrared light source are used for projecting illumination light to the inside of the inner barrel and respectively providing illumination light sources for the visible light camera and the infrared light camera. The illumination light reflected by the food materials in the inner barrel passes through the dichroic mirror, wherein visible light vertically passes through the dichroic mirror and enters the visible light camera, and infrared light horizontally reflects through the dichroic mirror and then enters the infrared camera. The visible light camera and the infrared camera respectively generate a visible light image and an infrared light image of the food material, the visible light image and the infrared light image are sent to the main control board, and the visible light image and the infrared light image are further processed by the image processing unit of the main control board.

The bottom equipment space or the side equipment space is internally provided with a main control board, the main control board is provided with a controller and is used for sending control signals to the water inlet valve and the water discharge valve so as to control the opening and closing of the water inlet valve and the water discharge valve, receiving the control signals sent by the control keys, displaying corresponding control information on the control display, sending displayed image information to the display screen, controlling the camera module and the light source module and receiving the image signals sent by the camera module and liquid level signals sent by the liquid level meter.

The bottom equipment space or the side equipment space is also provided with a network module, the network module can support communication modes such as a wireless or wired local area network, a public communication network or a short-range communication network, and the main control board realizes data interaction with the cloud server through the network module.

Further, the present invention provides a control method of a food material purifier, which is based on the food material purifier of the above embodiment, and includes the following steps executed in sequence:

the method comprises the following steps: when food materials are put into the inner barrel and the upper cover is closed, the main control board controls the blue light source to be turned on and controls the visible light camera to obtain a first visible light image of the food materials in the inner barrel and then turns off the blue light source;

step two: the main control board controls the infrared light source to be started, and controls the infrared camera to obtain a first infrared light image of the food material in the inner barrel and then to turn off the infrared light source;

step three: the main control board obtains a first superposed image of the food material according to the first visible light image and the first infrared light image; specifically, the temperature of the rotten area, the scar or the bug on the surface of the food material, such as the fruit, is different from other normal areas, for example, the microbial activity of these areas is active and generates a large amount of heat, so that the color of these areas is different from that of other normal areas in the infrared light image, and under the irradiation of visible blue light, the stains and the dirt on the surface of the fruit, which can not be cleaned, such as the rotten area, the scar or the bug, can be cleaned, but not much different, and dark spots can be formed in the blue light image, so that after receiving the first visible light image and the first infrared light image, the image processing unit of the main control panel extracts the second visible light image, which only includes the dark spots in the first visible light image, through pixel extraction or filtering method, and these dark spots can be the stains and the silt, the bug, etc. which can be cleaned, the infrared camera and the visible light camera are coaxial, so that the images obtained by the infrared camera and the visible light camera can be directly superposed, the second visible light image and the second infrared image are superposed, so that dark spots formed by the unwashable defects such as the rotten area, the scar or the wormhole in the first visible light image can be removed, and the dark spots formed by the unwashable defects such as the silt and the broken leaves can be reserved, so that the cleaning condition of the food material can be evaluated.

Step four: the main control board controls the water inlet valve to be opened, and simultaneously controls the ozone water device to be started, an external water source enters the ozone water device through the water inlet pipe, the ozone water device generates ozone molecules and dissolves the ozone molecules in water to form ozone water, the ozone water enters the inner barrel through the ozone water outlet, and meanwhile, the liquid level meter sends a first liquid level signal to the main control board;

step five: when the liquid level in the inner barrel reaches the liquid level detection tank, the liquid level meter sends a second liquid level signal to the main control board, the main control board controls the water inlet valve to be closed, meanwhile, the ozone water device is closed, the ultrasonic transmitter is started, ultrasonic waves are transmitted to the inner barrel, and the ultrasonic transmitter is closed after the first ultrasonic cleaning time. Because the ultrasonic wave produces the cavitation effect in aqueous, the microbubble in aqueous takes place to expand and breaks, has increased the dissolution rate of ozone to make ozone molecule decompose out the free radical with higher speed, the pollutant reacts with the free radical and generates harmless water and carbon dioxide, and exterminates the bacterium, has strengthened the disinfection effect of ozone greatly, and the ultrasonic wave can make stains such as silt on edible material surface drop from edible material surface, reaches the purpose of wasing edible material surface.

Step six: and the main control board starts the hydroxyl water device, the hydroxyl water device generates hydroxyl water and diffuses the hydroxyl water into the inner barrel, the main control board controls the ultrasonic emitter to start, and the hydroxyl water device and the ultrasonic emitter are closed after the second ultrasonic cleaning time is long. In this step, the produced hydroxyl water of hydroxyl water device is to eating the pollutant further reaction on material surface to ultrasonic emitter accelerates the diffusion of hydroxyl water in interior bucket, makes hydroxyl and pollutant fully contact, decomposes remaining ozone in the aquatic simultaneously, in order to prevent to produce harm to the human body, and further washs the stain on material surface to eating.

Step seven: the main control board opens the drain valve, the water in the inner barrel is discharged through the water outlet, and the drain valve is closed after a preset time.

Step eight: the main control board controls the blue light source to be started, and controls the visible light camera to obtain a third visible light image of the food materials in the inner barrel and then to be closed;

step nine: the main control board controls the infrared light source to be started, and controls the infrared camera to obtain a fourth infrared light image of the food materials in the inner barrel and then to turn off the infrared light source;

step ten: the main control board obtains a second superposed image of the food material according to the third visible light image and the third infrared light image;

step eleven: the main control board evaluates the purification effect of the food material by comparing the first superposed image with the second superposed image, and if the purification effect of the food material is better, executing the step twelve; and if the food material purification effect is insufficient, adjusting the first ultrasonic cleaning time length and/or the second ultrasonic cleaning time length according to the evaluation result, and executing the step four. For example, if in the first superimposed image (i.e. the image before cleaning), the food material surface can be cleaned with less stains, and the second superimposed image (i.e. the image after cleaning) is compared with the first superimposed image to find that the food material surface can be cleaned with more stains, the cleaning can be stopped. If the food material surface has more washable stains in the first superposed image (i.e. the image before washing), or the second superposed image (i.e. the image after washing) is compared with the first superposed image, the washable stains on the food material surface are found to remain for a certain amount, then the first ultrasonic washing time period and/or the second ultrasonic washing time period can be properly prolonged, and the second washing can be carried out.

Step twelve: and (4) stopping cleaning, sending the first visible light image and the third visible light image to a display screen by the main control board, and displaying a contrast image before and after cleaning the food material by the display screen.

In an alternative embodiment, part of the image processing may be performed by the cloud server, the main control board uploads the visible light image and the infrared light image to the cloud server through the communication module, the visible light image and the infrared light image are processed by the cloud server to obtain a first superimposed image and a second superimposed image, the cleaning effect is evaluated through the first superimposed image and the second superimposed image, the adjusted first ultrasonic cleaning duration and/or second ultrasonic cleaning duration is obtained through deep learning, and the evaluation result and the adjusted first ultrasonic cleaning duration and/or second ultrasonic cleaning duration are sent to the main control board.

Drawings

Fig. 1 is an external view of a food material purifying machine of the present invention;

fig. 2 is a side sectional view of the food material purification machine of the present invention;

fig. 3 is a top view of the interior of the food material purification machine of the present invention;

fig. 4 is a schematic view of a camera module of the food material purifier of the present invention;

fig. 5 is a schematic view of a liquid level meter of the food material purifying machine of the present invention.

The system comprises a camera module 1, a display screen 2, a control key 3, a control display 4, an ozone water outlet 5, a water outlet 6, a hydroxyl water outlet 7, a main control board 8, an ozone water device 9, a hydroxyl water device 10, a water inlet pipe 11, a water discharge valve 12, an ultrasonic emitter 13, a water inlet valve 14, a shell 15, an inner barrel 16, a network module 17, lighting modules 19-20, an upper cover 18, a liquid level detection tank 200, a lower detection surface 201, an upper detection surface 202, a lower polar plate 203, an upper polar plate 204, a capacitance detection unit 205, a liquid level detection unit 206, a barrier plate 207, a liquid inlet 208, a dichroic mirror 300, an infrared camera 301, a visible light camera 302, an image processing unit 303, a blue light source 304, an infrared light source 305, a vertical optical axis 306 and a horizontal optical axis 307.

Detailed Description

The invention is further explained below with reference to specific embodiments and the attached drawings.

In one embodiment, referring to fig. 2, the food machine of the present invention comprises a housing 15 and an inner tub 16, said inner tub 16 being arranged inside the housing 15 for placing food material to be cleaned. A gap is formed between the outer shell 15 and the inner barrel 16, and the gap comprises a bottom equipment space and a side equipment space which are used for installing internal equipment of the food material purifying machine. The bottom of the inner barrel 16 is provided with a water outlet 6, the water outlet 6 is connected with a drain pipe for discharging the waste water in the inner barrel 16, and the drain pipe is provided with a drain valve 12. An ultrasonic emitter 13 is arranged at one side of the water outlet 6, and the emitting end of the ultrasonic emitter 13 faces the inner barrel 16 and is used for emitting ultrasonic waves into the inner barrel 16. The other side of the water outlet 6 is provided with an ozone water outlet 5 and a hydroxyl water outlet 7, an ozone water device 9 and a hydroxyl water device 10 are installed in the bottom equipment space, ozone water generated by the ozone water device 9 is discharged into the inner tub 16 through the ozone water outlet 5, and hydroxyl water generated by the hydroxyl water device 10 is discharged into the inner tub 16 through the hydroxyl water outlet 7.

The side equipment space is also provided with a water inlet pipe 11, the water inlet pipe 11 is provided with a water inlet valve 14, the water inlet pipe 11 is connected with an ozone water device 9, when the water inlet valve 14 is opened, an external water source (such as tap water) enters the ozone water device 9 through the water inlet pipe 11, the ozone water device 9 generates ozone molecules, and the ozone molecules are dissolved in water to form ozone water and are discharged into the inner barrel 16 from the ozone water outlet 5. The ozone water unit 9 may generate ozone molecules using ozone stone. The hydroxyl water device 10 is communicated with the inner barrel 16 through the hydroxyl water outlet 7, and the hydroxyl water device 10 generates hydroxyl radicals through the electrolysis equipment and circulates the generated hydroxyl water to the inner barrel 16 through the hydroxyl water outlet 7.

A liquid level meter is further arranged on the inner wall of the inner barrel 16, the liquid level meter can adopt an ultrasonic liquid level meter or a differential pressure liquid level meter, and the liquid level meter is used for detecting the height of the water level in the inner barrel 16 and sending a liquid level signal to the main control panel 8.

Because water and solid food materials exist in the inner barrel 16 of the present application at the same time, and for measuring the height of the liquid level under the condition of solid-liquid mixing, the liquid level meter in the prior art is easily interfered by the solid object in the container (for example, the ultrasonic wave emitted by the ultrasonic sensor is reflected by the solid food materials higher than the water surface, so that the correct liquid level cannot be embodied), so that the liquid level meter is not suitable for detecting the liquid level in the inner barrel 16 of the present invention. The capacitive level gauge includes a level detection tank 200, an upper plate 204, a lower plate 203, a capacitance detection unit 205, and a level detection unit 206 (see fig. 5). A liquid level detection groove 200 (see fig. 2, the left side wall position of the upper part of the inner barrel 16) is formed at a set height of the side wall of the inner barrel 16 (the set height refers to the height from the bottom of the inner barrel 16), the set height is determined by the water surface height allowed by the inner barrel 16, the liquid level detection groove 200 is upwardly deflected by a certain angle theta relative to the horizontal plane, the liquid level detection groove 200 has an upper detection surface 202 and a lower detection surface 201, the height of the upper detection surface and the height of the lower detection surface can be set to be 2-3 cm, an upper polar plate 204 is arranged on the upper surface of the upper detection surface 202, a lower polar plate 203 is arranged on the lower surface of the lower detection surface 201, the upper polar plate and the lower polar plate are oppositely arranged, the upper polar plate and the lower polar plate are mutually insulated (for example, an insulating layer is bonded between the upper polar plate and the lower detection surface, or the upper detection surface and the lower detection surface of the liquid level detection groove 200 are made of plastic or insulating resin material), and a capacitance measuring unit is used for detecting the capacitance between the upper polar plate and the lower polar plate and the upper polar plate and the lower polar plate, and sends the capacitance value to the liquid level detection unit 206, the liquid level detection unit 206 compares the capacitance value with a preset capacitance value, the preset capacitance value is the capacitance between the upper and lower electrode plates when there is no water in the detection tank, and generates a liquid level signal according to the comparison result and sends the liquid level signal to the main control board 8. Further, in order to prevent the food materials in the inner barrel 16 from entering the detection tank and interfering the capacitance detection unit 205, a blocking plate 207 is vertically arranged at the upper end of the notch of the liquid level detection tank 200, a liquid inlet 208 is arranged between the blocking plate 207 and the lower end of the notch of the liquid level detection tank 200, the height of the liquid inlet 208 can be set to be 0.2-0.5 cm, the blocking plate 207 can prevent the food materials from entering the liquid level detection tank 200 to cause interference, and the inclined arrangement of the liquid level detection tank 200 can enable the water in the liquid level detection tank 200 to be completely discharged under the action of gravity and not to be retained in the liquid level detection tank 200 during water drainage. When the water inlet pipe 11 feeds water into the inner barrel 16, the water level inside the inner barrel 16 rises continuously and enters the liquid level detection groove 200 from the liquid inlet 208. When no water exists in the liquid level detection tank 200, the capacitance between the upper and lower electrode plates is a first capacitance, the liquid level detection unit 206 compares the first capacitance with a preset capacitance value, the difference value between the first capacitance and the preset capacitance value is within an allowable range, and the liquid level detection unit 206 generates a first liquid level signal; after the liquid level detection tank 200 is filled with water, the difference between the dielectric constant of tap water and air causes the capacitance between the upper and lower electrode plates to change significantly, so as to generate a second capacitance, the liquid level detection unit 206 compares the second capacitance with a preset capacitance, the difference between the two capacitances exceeds an allowable range, and the liquid level detection unit 206 generates a second liquid level signal. And the main control board 8 receives the first liquid level signal to indicate that no water exists in the inner barrel 16 or the water level is not full at present, and the main control board 8 receives the second liquid level signal to indicate that the water level in the inner barrel 16 reaches the preset water level, and water inlet should be stopped.

The water inlet valve 14 and the water discharge valve 12 are controllable electromagnetic valves and are electrically connected with the main control board 8, and the main control board 8 can control the opening and closing of the water inlet valve 14 and the water discharge valve 12.

As shown in fig. 1, the upper surface of the casing 15 of the food material purifying machine includes an upper cover 18 and a control area, and the upper cover 18 can be opened to take and place food materials from the inner tub 16. The upper cover 18 is provided with a display screen 2, and the control area comprises a control display 4 and control keys 3. The inner side of the upper cover 18 is provided with a camera module 1 and

lighting modules

19 and 20, the camera module 1 is used for imaging food materials in the inner barrel 16 and sending food material images to the main control board 8, and the

lighting modules

19 and 20 are used for providing lighting sources for the camera module 1. Display screen 2, control button 3, control display 4, lighting module and the module 1 of making a video recording all with main control board 8 electrical connection.

Specifically, the camera module 1 is a visible light and infrared light dual-mode lens, referring to fig. 4, the camera module 1 includes a dichroic mirror 300, a visible light camera 302 disposed along a vertical optical axis 306 above the dichroic mirror 300, and an infrared light camera 301 disposed along a horizontal optical axis 307 at the side of the dichroic mirror 300, and a blue light source 304 and an infrared light source 305 are further disposed at the two sides of the dichroic mirror 300, respectively, for example, in an arrangement of an annular linear light source or an annular multi-point light source, the lower end of the dichroic mirror 300 faces the inside of the inner barrel 16, and the blue light source 304 and the infrared light source 305 are used for projecting illumination light to the inside of the inner barrel 16, and provide illumination light sources for the visible light camera 302 and the infrared light camera 301, respectively. The illumination light reflected by the food material in the inner barrel 16 passes through the dichroic mirror 300, wherein the visible light vertically passes through the dichroic mirror 300 and enters the visible light camera 302, and the infrared light horizontally reflects through the dichroic mirror 300 and enters the infrared light camera 301. The visible light camera 302 and the infrared light camera 301 respectively generate a visible light image and an infrared light image of the food material, and send the visible light image and the infrared light image to the main control board 8, and the visible light image and the infrared light image are further processed by the image processing unit 303 of the main control board 8.

The bottom equipment space or the side equipment space is provided with a main control board 8, the main control board 8 is provided with a controller, the main control board 8 is used for sending control signals to the water inlet valve 14 and the water discharge valve 12 to control the opening and closing of the water inlet valve 14 and the water discharge valve 12, receiving the control signals sent by the control keys 3, displaying corresponding control information on the control display 4, sending displayed image information to the display screen 2, controlling the camera module 1 and the

light source modules

19 and 20, and receiving the image signals sent by the camera module 1 and liquid level signals sent by the liquid level meter.

The bottom device space or the side device space is also provided with a network module 17, the network module 17 can support wireless or wired local area network, public communication network or short-range communication network and other communication modes, and the main control board 8 realizes data interaction with the cloud server through the network module 17.

Because cleanable stains such as silt, bugs, rotten leaves and the like may exist on the surface of the food material to be purified, the stains can be removed from the surface of the food material in an ultrasonic cleaning manner, but the ultrasonic itself has a negative effect on the food material, the long-time ultrasonic cleaning may cause damage to the food material, and accelerate rotting or softening of the food material, so as to reduce the quality of the food material, the food material is cleaned by the existing purifier in the prior art, the cleaning time duration cannot be adjusted according to the food material purification degree, and the food material surface may have inherent defects which cannot be removed, such as rotten areas, black spots or wormholes on the surface of fruits, which cannot be eliminated by the cleaning manner, how to distinguish the cleanable stains from the inherent defects which cannot be cleaned, and how to dynamically adjust the time duration of the food material cleaning procedure according to the purification degree of the market, is the technical problem to be solved by the invention.

the method comprises the following steps: when the food materials are put into the inner barrel 16 and the upper cover 18 is closed, the main control board 8 controls the blue light source 304 to be turned on, and controls the visible light camera 302 to obtain a first visible light image of the food materials in the inner barrel 16 and then turns off the blue light source 304;

step two: the main control board 8 controls the infrared light source to be turned on, and controls the infrared camera 301 to obtain a first infrared light image of the food material in the inner barrel 16 and then turn off the infrared light source 305;

step three: the main control board 8 obtains a first superposed image of the food material according to the first visible light image and the first infrared light image; specifically, the temperatures of rotten areas, scars or wormholes of the surfaces of food materials such as fruits are different from those of other normal areas, for example, the microbial activities of these areas are active and generate a large amount of heat, so that the colors of these areas are different from those of other normal areas in the infrared light image, but under the irradiation of visible blue light, the stains such as sand and broken leaves on the surfaces of the fruits can be cleaned, and the defects such as the rotten areas, the scars or the wormholes can not be cleaned, but are not greatly different, so that dark spots can be formed in the blue light image, and therefore, after receiving the first visible light image and the first infrared light image, the image processing unit 303 of the main control panel 8 extracts, through pixel extraction or a filtering method, the two images are subjected to filtering and denoising processing, and then extracts a second visible light image only including the dark spots in the first visible light image, and these dark spots can be sand, or wormholes, The method comprises the steps of cleaning stains such as broken leaves and the like, possibly un-cleanable defects such as rotten areas, scars or wormholes and the like, simultaneously filtering images of normal areas in an infrared image by adopting a mean value filtering method, only keeping second infrared images of color difference areas generated by the un-cleanable defects such as the rotten areas, the scars or the wormholes and the like, directly superposing the images obtained by the infrared camera 301 and the visible light camera 302, only keeping dark spots formed by the un-cleanable defects such as the rotten areas, the scars or the wormholes and the like in the first visible image by superposing the second visible image and the second infrared image, and accordingly evaluating the cleaning condition of food materials.

Step four: the main control panel 8 controls the water inlet valve 14 to be opened, simultaneously controls the ozone water device 9 to be started, an external water source enters the ozone water device 9 through the water inlet pipe 11, the ozone water device 9 generates ozone molecules and dissolves the ozone molecules in water to form ozone water, the ozone water enters the inner barrel 16 through the ozone water outlet 5, and meanwhile, the liquid level meter sends a first liquid level signal to the main control panel 8;

step five: when the liquid level in the inner barrel 16 reaches the liquid level detection tank 200, the liquid level meter sends a second liquid level signal to the main control board 8, the main control board 8 controls the water inlet valve 14 to be closed, the ozone water device 9 is closed, the ultrasonic emitter 13 is started, ultrasonic waves are emitted to the interior of the inner barrel 16, and the ultrasonic emitter 13 is closed after the first ultrasonic cleaning time. Because the ultrasonic wave produces the cavitation effect in aqueous, the microbubble in aqueous takes place to expand and breaks, has increased the dissolution rate of ozone to make ozone molecule decompose out the free radical with higher speed, the pollutant reacts with the free radical and generates harmless water and carbon dioxide, and exterminates the bacterium, has strengthened the disinfection effect of ozone greatly, and the ultrasonic wave can make stains such as silt on edible material surface drop from edible material surface, reaches the purpose of wasing edible material surface.

Step six: the main control board 8 starts the hydroxyl water device 10, the hydroxyl water device 10 generates hydroxyl water and diffuses the hydroxyl water into the inner barrel 16, the main control board 8 controls the ultrasonic emitter 13 to start, and the hydroxyl water device 10 and the ultrasonic emitter 13 are closed after the second ultrasonic cleaning time. In this step, the hydroxyl water generated by the hydroxyl water device 10 further reacts to the contaminants on the surface of the food material, and the ultrasonic emitter 13 accelerates the diffusion of the hydroxyl water in the inner barrel 16, so that the hydroxyl group is sufficiently contacted with the contaminants, and simultaneously decomposes the residual ozone in the water, thereby preventing the damage to the human body and further cleaning the contaminants on the surface of the food material.

Step seven: the main control board 8 opens the drain valve 12, the water in the inner barrel 16 is drained through the drain port 6, and the drain valve 12 is closed after a preset time period.

Step eight: the main control board 8 controls the blue light source 304 to be turned on, and controls the visible light camera 302 to obtain a third visible light image of the food material in the inner barrel 16 and then turns off the blue light source 304;

step nine: the main control board 8 controls the infrared light source to be turned on, and controls the infrared camera 301 to obtain a fourth infrared light image of the food material in the inner barrel 16 and then turn off the infrared light source 305;

step ten: the main control board 8 obtains a second superposed image of the food material according to the third visible light image and the third infrared light image;

step eleven: the main control board 8 evaluates the purification effect of the food material by comparing the first superimposed image and the second superimposed image, and if the purification effect of the food material is better, executing the step twelve; and if the food material purification effect is insufficient, adjusting the first ultrasonic cleaning time length and/or the second ultrasonic cleaning time length according to the evaluation result, and executing the step four. For example, if in the first superimposed image (i.e. the image before cleaning), the food material surface can be cleaned with less stains, and the second superimposed image (i.e. the image after cleaning) is compared with the first superimposed image to find that the food material surface can be cleaned with more stains, the cleaning can be stopped. If the food material surface has more washable stains in the first superposed image (i.e. the image before washing), or the second superposed image (i.e. the image after washing) is compared with the first superposed image, the washable stains on the food material surface are found to remain for a certain amount, then the first ultrasonic washing time period and/or the second ultrasonic washing time period can be properly prolonged, and the second washing can be carried out.

Step twelve: cleaning stops, the main control board 8 sends the first visible light image and the third visible light image to the display screen 2, and the display screen 2 displays contrast images before and after food cleaning.

In an alternative embodiment, part of the image processing may be performed by the cloud server, the main control board 8 uploads the visible light image and the infrared light image to the cloud server through the communication module, the visible light image and the infrared light image are processed by the cloud server to obtain a first superimposed image and a second superimposed image, the cleaning effect is evaluated through the first superimposed image and the second superimposed image, the adjusted first ultrasonic cleaning duration and/or second ultrasonic cleaning duration is obtained through deep learning, and the evaluation result and the adjusted first ultrasonic cleaning duration and/or second ultrasonic cleaning duration are sent to the main control board 8.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can conceive of changes or substitutions within the technical scope of the present invention.

Claims

1. A food material purifier comprises a shell and an inner barrel, wherein the inner barrel is arranged in the shell and used for placing food materials to be cleaned, a gap is formed between the shell and the inner barrel, the gap comprises a bottom equipment space and a side equipment space, and the bottom equipment space and the side equipment space are used for installing internal equipment of the food material purifier; the bottom of the inner barrel is provided with a water outlet which is connected with a water drainage pipe and used for discharging the wastewater in the inner barrel, and the water drainage pipe is provided with a water drainage valve; a main control board is arranged in the bottom equipment space or the side equipment space;

the ultrasonic washing machine is characterized in that an ultrasonic emitter is arranged on one side of the water outlet, the emitting end of the ultrasonic emitter faces towards the inner barrel and is used for emitting ultrasonic waves to the interior of the inner barrel, an ozone water outlet and a hydroxyl water outlet are arranged on the other side of the water outlet, an ozone water device and a hydroxyl water device are installed in the bottom equipment space, ozone water generated by the ozone water device is discharged into the inner barrel through the ozone water outlet, and hydroxyl water generated by the hydroxyl water device is discharged into the inner barrel through the hydroxyl water outlet; the lateral equipment space is also provided with a water inlet pipe, a water inlet valve is arranged on the water inlet pipe, the water inlet pipe is connected with an ozone water device, when the water inlet valve is opened, an external water source enters the ozone water device through the water inlet pipe, the ozone water device generates ozone molecules, and the ozone molecules are dissolved in water to form ozone water and are discharged into the inner barrel from an ozone water outlet; the hydroxyl water device is communicated with the inner barrel through a hydroxyl water outlet, generates hydroxyl radicals through the electrolysis equipment and circulates the generated hydroxyl water into the inner barrel through the hydroxyl water outlet; the water inlet valve and the drain valve are controllable electromagnetic valves and are electrically connected with the main control board, and the main control board can control the opening and closing of the water inlet valve and the drain valve; the inner wall of the inner barrel is also provided with a liquid level meter, and the liquid level meter is used for detecting the height of the water level in the inner barrel and sending a liquid level signal to the main control board;

the upper surface of the shell of the food material purifier comprises an upper cover and a control area, wherein the upper cover can be opened and food materials can be taken from and placed in the inner barrel; the food bin is characterized in that a display screen is arranged on the upper cover, the control area comprises a control display and control keys, a camera module and a lighting module are arranged on the inner side of the upper cover, the camera module is used for imaging food materials in the inner bin and sending food material images to the main control board, and the lighting module is used for providing a lighting source for the camera module; the display screen, the control keys, the control display, the lighting module and the camera module are electrically connected with the main control panel;

the main control board is used for sending control signals to the water inlet valve and the drain valve so as to control the opening and closing of the water inlet valve and the drain valve, receiving the control signals sent by the control keys, displaying corresponding control information on the control display, sending displayed image information to the display screen, controlling the camera module and the light source module, and receiving the image signals sent by the camera module and liquid level signals sent by the liquid level meter;

the liquid level meter comprises a liquid level detection tank, an upper polar plate, a lower polar plate, a capacitance detection unit and a liquid level detection unit, a liquid level detection groove is arranged at the set height of the side wall of the inner barrel, the liquid level detection groove deflects upwards by a certain angle theta relative to the horizontal plane, the liquid level detection tank is provided with an upper detection surface and a lower detection surface, the upper surface of the upper detection surface is provided with an upper polar plate, the lower surface of the lower detection surface is provided with a lower polar plate, the upper polar plate and the lower polar plate are oppositely arranged, the upper and lower polar plates are insulated from each other, and the capacitance between the upper and lower polar plates is detected by the capacitance measuring unit, and sends the capacitance value to a liquid level detection unit, which compares the capacitance value with a preset capacitance value, the preset capacitance value is the capacitance between the upper and lower polar plates when no water exists in the detection tank, and a liquid level signal is generated according to a comparison result and sent to the main control board; a blocking plate is vertically arranged at the upper end of the notch of the liquid level detection groove, a liquid inlet is arranged between the blocking plate and the lower end of the notch of the liquid level detection groove, the height of the liquid inlet is set to be 0.2-0.5 cm, the blocking plate can prevent food materials from entering the liquid level detection groove to cause interference, and the liquid level detection groove is obliquely arranged to enable water in the liquid level detection groove to be completely discharged under the action of gravity and not to be retained in the liquid level detection groove during drainage; when the water inlet pipe enters the inner barrel, the water level in the inner barrel rises continuously and enters the liquid level detection groove from the liquid inlet; when no water exists in the liquid level detection tank, the capacitor between the upper polar plate and the lower polar plate is a first capacitor, the liquid level detection unit compares the first capacitor with a preset capacitance value, the difference value of the first capacitor and the preset capacitance value is within an allowable range, and the liquid level detection unit generates a first liquid level signal; after water enters the liquid level detection tank, the capacitor between the upper polar plate and the lower polar plate is a second capacitor, the liquid level detection unit compares the second capacitor with a preset capacitance value, the difference value of the second capacitor and the preset capacitance value exceeds an allowable range, and the liquid level detection unit generates a second liquid level signal; the main control board receives a first liquid level signal to indicate that no water exists in the inner barrel or the water level is not full at present, and receives a second liquid level signal to indicate that the water level in the inner barrel reaches a preset water level, and water inlet is stopped; the camera module is a visible light and infrared light dual-mode lens, the camera module comprises a dichroic mirror, a visible light camera and an infrared light camera, the visible light camera is arranged above the dichroic mirror and is arranged along a vertical optical axis, the infrared light camera is arranged on the side of the dichroic mirror and is arranged along a horizontal optical axis, a blue light source and an infrared light source are respectively arranged on two sides of the dichroic mirror, the blue light source and the infrared light source are arranged in an annular linear light source or annular multi-point light source mode, the lower end of the dichroic mirror faces the inner barrel, the blue light source and the infrared light source are used for projecting illumination light to the inner barrel, and illumination light sources are respectively provided for the visible light camera and the infrared light camera; illuminating light reflected by food materials in the inner barrel passes through the dichroic mirror, wherein visible light vertically passes through the dichroic mirror and enters the visible light camera, and infrared light horizontally reflects through the dichroic mirror and enters the infrared camera; the visible light camera and the infrared camera respectively generate a visible light image and an infrared light image of the food material, the visible light image and the infrared light image are sent to the main control board, the visible light image and the infrared light image are further processed by the image processing unit of the main control board, deep color spots formed by defects which cannot be cleaned in the visible light image are removed by overlapping the visible light image and the infrared light image, and only the deep color spots formed by cleanable stains are reserved, so that the cleaning condition of the food material is evaluated.