JP4476153B2 - Food cleaning and sterilizing apparatus and food cleaning and sterilizing method - Google Patents

Description

  The present invention relates to a food cleaning and sterilizing apparatus and a food cleaning and sterilizing method, for example, a food cleaning and sterilizing apparatus and a food cleaning and sterilizing method for automatically cleaning food such as vegetables and fruits.

  In recent years, with the increase in imported foods in Japan, the amount of residue remaining in post-harvest pesticides is also less than in post-harvest pesticides due to the residue of post-harvest pesticides used in vegetables and fruits. However, the safety problem due to the residue of pre-harvest pesticides used during cultivation is attracting attention. On the other hand, the number of crops produced by pesticide-free or organic farming that does not use pesticides is increasing year by year. These crops have little pesticide residue but may have harmful bacteria attached to them and are not always safe.

  Therefore, it is important to thoroughly wash crops in terms of ensuring food safety and hygiene.

  Conventionally, cleaning and sterilization using chemicals has been performed, but there are concerns about the effect on the human body, and in recent years, various methods for sufficiently cleaning and sterilizing food in a manner that does not affect the human body have been proposed. .

  For example, JP-A-9-19376, JP-A-9-14368, and JP-A-2003-29940 disclose the cleaning and sterilization of contaminants that are effectively adhered to food by the ozone cleaning and sterilizing effect using ozone. A cleaning device to perform is shown.

Japanese Patent Application Laid-Open No. 7-236461 and Japanese Patent Application Laid-Open No. 2-231066 disclose a method for further effective cleaning and sterilization by using fine bubbles together with ozone.
Japanese Patent Laid-Open No. 9-19376 JP-A-9-14368 JP 2003-29940 A JP-A-7-236461 Japanese Patent Laid-Open No. 2-231066

  However, ozone water has a strong disinfecting and sterilizing power, and thus has been known to exert an effect on various bacteria. However, some bacteria require a stronger sterilizing power. In addition, as described above, strong agricultural chemicals and the like are sometimes used in foods, and it is necessary to decompose and remove such agricultural chemicals.

  Therefore, food can be washed and sterilized more effectively in a shorter time if washing and sterilizing water (hereinafter referred to as washing liquid) having stronger sterilizing power and decomposing power can be used without affecting the human body.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a food washing and sterilizing apparatus and a food washing and sterilizing method capable of performing strong washing and sterilizing treatment on food. .

A food cleaning and sterilizing apparatus according to the present invention includes a cleaning tank for cleaning food, an injection unit for spraying a cleaning liquid containing ozone to food stored in the cleaning tank at the time of cleaning, and a cleaning liquid in the cleaning tank And a cleaning liquid decomposition processing means for decomposing the cleaning liquid in the processing tank, and a drying means for spraying and drying gas on the food in the cleaning tank . The cleaning tank includes an ultraviolet lamp for irradiating ultraviolet rays, and the food is immersed in the cleaning liquid in the cleaning tank, and the ultraviolet lamp irradiates the cleaning liquid with ultraviolet rays to generate hydroxy radicals during cleaning.

  Preferably, the apparatus further includes a bubble generating unit for dissolving the fine bubbled gas until the supersaturated state is obtained with respect to the cleaning liquid supplied to the injection unit during cleaning.

  Preferably, the apparatus further includes a circulation means for supplying the cleaning liquid in the cleaning tank to the injection unit and circulating the cleaning liquid.

  In particular, the cleaning liquid decomposition processing means includes an ultraviolet lamp for irradiating the cleaning liquid in the processing tank with ultraviolet light.

The method for cleaning and sterilizing food according to the present invention includes a step of spraying a cleaning liquid containing ozone to food in a cleaning tank at the time of cleaning, and irradiating the cleaning liquid in the cleaning tank with ultraviolet rays to generate hydroxy radicals. A step , a step of decomposing the cleaning liquid, and a step of spraying and drying a gas on the food in the cleaning tank .

  The food washing and sterilizing apparatus and the food washing and sterilizing method according to the present invention generate hydroxy radicals by irradiating ultraviolet rays onto a cleaning liquid containing ozone. As a result, it is possible to execute a cleaning and sterilization treatment that efficiently removes and decomposes bacteria, agricultural chemicals, and other contaminants attached to foods by sterilization and decomposition power stronger than ozone.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and detailed description thereof will not be repeated.

  FIG. 1 is a diagram schematically illustrating a piping system diagram of a food cleaning and sterilizing apparatus according to an embodiment of the present invention. In this example, a case where food or the like is washed and sterilized as a washing sample is described, but the present invention is not limited to this, and other substances can be used as the washing sample.

  A food cleaning sterilization apparatus 1 (hereinafter also simply referred to as apparatus 1) according to an embodiment of the present invention includes a cleaning sterilization tank 10, an injection valve switch 5, a cleaning liquid treatment tank 20, a bubble generator 25, and ozone generation. The unit 30, the mixing pump 35, the ozonolysis units 40 and 45, the dryer 50, the solenoid valves V <b> 0 to V <b> 13, and a control circuit 60 that controls the entire apparatus. The control circuit 60 includes a CPU (not shown), a storage unit, a power switch, a liquid crystal screen, and the like. Then, the CPU 1 controls the entire apparatus 1 by sending control signals to each component constituting the apparatus 1 in accordance with a control program stored in the storage unit when the power switch is turned on. Perform cleaning and sterilization.

  The cleaning sterilization tank 10 includes an openable / closable cleaning tank opening / closing lid 11 for inserting the cleaning sample 17 on the upper surface, and a cleaning tank part for storing the cleaning liquid and immersing the cleaning sample 17 to execute the cleaning sterilization process. 12. Further, in the cleaning layer portion 12, a densitometer 18 for measuring the concentration of the cleaning liquid, an ultraviolet lamp 14 for irradiating ultraviolet rays, a mounting means 16 for mounting the cleaning sample 17, and a cleaning A turbulent flow plate 15 is provided for flowing and stirring the cleaning liquid in the tank during cleaning. In FIG. 1, four ultraviolet lamps are shown, and the ultraviolet lamp 14 irradiates ultraviolet rays in response to an instruction from the control circuit 60.

  The injection valve switch 5 receives the supply of the cleaning liquid, and efficiently and evenly sprays the cleaning liquid onto the cleaning sample 17 while changing the injection position and the like with respect to the cleaning sample 17 in the cleaning tank unit 12. Cleaning and sterilization is performed in the section 12.

  The cleaning liquid processing tank 20 is a processing tank for receiving the supply of the cleaning liquid stored in the cleaning tank unit 12 and processing the cleaning liquid, and an ultraviolet lamp that irradiates ultraviolet rays in response to an instruction from the control circuit 60 inside. 21 and a turbulent flow plate 22.

  The bubble generator 25 receives the supply of the cleaning liquid from the mixing pump 35 via the electromagnetic valve V14, and performs an on / off operation in response to an instruction from the control circuit 60. It discharges with respect to the injection valve switching device 5 through the valve V11. Examples of the bubble water generating method of the bubble generator 25 include a so-called extrusion method, pressurizing and depressurizing method, shearing method, ejector method, and the like, and gas-liquid mixing is performed at a pump pressure. Here, bubble water is an aqueous solution in which a gas is made into ultrafine bubbles and dissolved in a supersaturated state. Moreover, the path | route which bypasses the bubble generator 25 via the solenoid valve V13 is also provided.

  The ozone generator (ozonizer) 30 receives a supply of oxygen from an oxygen cylinder (not shown), or receives a supply of oxygen whose oxygen concentration is increased by removing nitrogen from compressed air by using a compressor (not shown). In response to the instruction 60, ozone is generated and output to the mixing pump 35 via the electromagnetic valve V10.

  The mixing pump 35 mixes (mixes) water supplied through the electromagnetic valve V9 and ozone from the ozone generator 30 in response to an instruction from the control circuit 60, and generates a bubble generator through the electromagnetic valve V14. To 25. When the mixing pump 35 does not execute the mixing operation, it functions as a normal pump, and the cleaning liquid is sent to the injection valve switching unit 5 via the bubble generator 25. Here, the water supplied through the electromagnetic valve V9 is clarified water. The clarified water can be chlorinated tap water.

  The ozone decomposers 40 and 45 have a manganese-based catalyst for decomposing ozone gas. If the internal pressures of the cleaning sterilization tank 10 and the cleaning liquid treatment tank 20 are higher than the external pressure, the ozone gas inside the tank is ozone. It is decomposed by the decomposers 40 and 45, rendered harmless and discharged outside.

  The dryer 50 is supplied with compressed air, injects dry compressed air from which moisture has been removed, into the cleaning sterilization tank via the electromagnetic valves V0 and V1, and removes water droplets and the like adhering to the cleaning sample 17. Is.

  Solenoid valves V2, V4, and V5 are provided between the cleaning sterilization tank 10 and the cleaning liquid treatment tank 20, and are opened and closed in response to instructions from the control circuit 60. The cleaning liquid in the cleaning sterilization tank 10 is sent to the cleaning liquid processing tank 20. Solenoid valves V2, V3, and V11 are used when the cleaning liquid in the cleaning sterilization tank 10 is circulated. In response to an opening operation instruction from the control circuit 60, the cleaning liquid in the cleaning sterilization tank 10 is mixed with the mixing pump 35 and It is circulated through the bubble generator 25. The solenoid valves V5, V8, and V12 are used when circulating the cleaning liquid in the cleaning liquid processing tank 20, and the cleaning liquid is circulated through the mixing pump 35 in response to an opening operation instruction from the control circuit 60. . At the time of draining, the control circuit 60 instructs the electromagnetic valve V7 to open, and drains the cleaning liquid in the cleaning liquid processing tank 20.

  FIG. 2 is a flowchart illustrating a method for cleaning and sterilizing food according to the embodiment of the present invention.

  Referring to FIG. 2, first, the cleaning and sterilization of the food is started (step S0).

  Next, the cleaning sample 17 is put into the cleaning tank portion 12 of the cleaning sterilization tank 10 (step S1). At this time, the cleaning sample 17 is placed at a predetermined position by the mounting means 16.

  Next, the cleaning tank opening / closing lid 11 is closed (step S2). Thus, the preparation for cleaning and sterilizing the cleaning sample 17 in the cleaning and sterilization tank 10 (hereinafter collectively referred to as a cleaning tank) is completed.

  Next, bubble water is sprayed from the spray valve switch 5 to the cleaning sample 17 in the cleaning tank 12 to be cleaned (step S3).

  FIG. 3 is a diagram for explaining the operation of the food washing and sterilizing apparatus 1 when washing a washing sample using bubble water.

  Referring to FIG. 3, in response to an instruction from control circuit 60, electromagnetic valve V <b> 9 opens and clarified water is supplied to mixing pump 35. Then, the clarified water is supplied to the bubble generator 25 by the mixing pump 35 via the electromagnetic valve V14. The bubble generator 25 is turned on in response to an instruction from the control circuit 60, and is supplied to the injection valve switching device 5 through the electromagnetic valve V11 as bubble water in the bubble generator 25. Here, the solenoid valve V13 is in an off state and the solenoid valve V14 is in an on state.

  The injection valve switching unit 5 injects high-pressure bubble water pumped up by the mixing pump 35 via the electromagnetic valve V11 onto the cleaning sample 17, and cleans the cleaning sample 17 while switching the injection position.

  Bubble water is an aqueous solution in which a gas is made into ultrafine bubbles and dissolved in a supersaturated state as described above. By causing the bubble water containing the ultrafine bubbles to collide with the cleaning sample 17, bubble destruction heat is generated at the moment of the collision, so that germs touching this heat are sterilized.

  Further, when the bubbles burst, ultrasonic waves are generated, which can scrape dirt that cannot be removed by normal cleaning. Also, the force when bubbles are ruptured, specifically vacuum / suction force works, and the surface tension of fine bubbles acts to effectively peel off and remove attached dust, dirt, agricultural chemicals, bacteria, etc. Can do. In addition, as a fine bubble, it is a very fine bubble of 1-50 micrometers.

  Thereby, even if it is invisible dirt, by using bubble water, it is possible to remove dust, dirt, pesticides and bacteria that cannot be removed by ordinary washing with water attached to the washing sample 17 and to be sterilized by washing. Moreover, miscellaneous bacteria can also be sterilized by the heat sterilization effect by the bubble destruction heat. Furthermore, since it reaches the vegetable surface with water repellent life and the inside of the unevenness, a high cleaning effect can be obtained.

  Next, referring again to FIG. 2, the cleaning sample 17 is cleaned by spraying ozone water into the cleaning tank 12 (step S4).

  FIG. 4 is a diagram for explaining the operation of the food cleaning and sterilizing apparatus 1 when spraying a cleaning sample using ozone water.

  Referring to FIG. 4, in response to an instruction from control circuit 60, electromagnetic valve V <b> 9 opens and clear water is supplied to mixing pump 35. Further, the ozone generator 30 is turned on, receives the supply of compressed air, generates ozone, and supplies the ozone to the mixing pump 35 via the electromagnetic valve V10. Thereby, in the mixing pump 35, the ozone produced by the compressed air generated by the ozone generator 30 is mixed with the clarified water to become ozone water. And ozone water is supplied to the injection valve switching device 5 via the electromagnetic valve V13 and the electromagnetic valve V11. Here, the electromagnetic valve V13 is in an on state and the electromagnetic valve V14 is in an off state.

  The ozone water in this example is not limited to the case where all ozone is dissolved in the aqueous solution. For example, gaseous ozone becomes mist (containing water) and is dispersed in the gas (air, etc.). It is assumed that such a state is included. In this case, the bubble generator 25 is turned off. That is, ozone water is supplied to the injection valve switching device 5 through a bypass path via the electromagnetic valve V13.

  The injection valve switch 5 receives ozone water supplied by the same operation as described above and injects it onto the cleaning sample 17. Ozone water is known to have a strong sterilizing power. Thereby, the cleaning sample 17 can be disinfected and sterilized.

  Then, referring again to FIG. 2, the ultraviolet lamp 14 in the cleaning tank is turned on in response to an instruction from the control circuit 60 (step S5). The cleaning sample 17 is sterilized and sterilized by being immersed in ozone mist or ozone water with the injection of ozone water.

  When this ozone water is irradiated with ultraviolet rays, hydroxy radicals having higher oxidizing power than ozone are generated. Therefore, it is possible to effectively and quickly disinfect and sterilize bacteria difficult to disinfect with ozone water. In addition, although the case where the ultraviolet lamp 14 is turned on in step S5 has been described, the ultraviolet lamp 14 is specifically turned on after step S2 before the bubble water is jetted into the cleaning tank for cleaning. Is also possible. This is because bacteria attached to the cleaning sample 17 can be sterilized by irradiation with ultraviolet rays.

  In addition, the hydroxy radical has a strong bactericidal ability and a strong ability to decompose hardly-degradable substances. For example, it is possible to decompose chemical substances used in agricultural chemicals. Therefore, it is not necessary to decompose and remove using other chemicals, etc., and since it is generated by irradiating with ultraviolet rays, it is not necessary to provide another process as a cleaning process, and the cleaning sterilization time can be shortened and the cost can be reduced. It is also useful. For example, the compounds decomposed by hydroxy radicals include dioxins, PCB, benzene, toluene, isopropanol, dichloroethylene, trichloroethylene, dichloromethane, trichloroethane, dichloropropene, thiuram, simazine, thiobencarb, and the like.

  FIG. 5 is a diagram for explaining an oxidation potential indicating the oxidizing power of a typical oxidizing agent.

  Here, relative values based on chlorine values are shown.

  As shown in FIG. 5, it is shown that the hydroxyl radical has stronger oxidizing power than chlorine and further ozone. Hydroxyl radical is a compound generated by the photo-oxidation method by ultraviolet ray (UV) irradiation to ozone water as described above. It oxidizes and decomposes organic compounds, and finally pollutes with water, carbonic acid. Decomposes and extinguishes molecules such as gas and oxygen. In particular, since the molecular bond of the organic compound can be broken by ultraviolet irradiation, it is possible to efficiently decompose and purify even hard-to-decompose organic substances. Moreover, since sterilization is possible in a short time, the browning of vegetables can also be prevented.

  Then, referring again to FIG. 2, the cleaning liquid in the cleaning tank is circulated in the next step (step S6).

  FIG. 6 is a diagram for explaining a case in which ozone water as a cleaning liquid is circulated and ultraviolet radicals are irradiated in the cleaning tank to generate hydroxy radicals.

  Referring to FIG. 6, electromagnetic valves V2, V3, V10, V11, V13 are opened in response to an instruction from control circuit 60, and the cleaning solution of ozone water in the cleaning tank is circulated to mix pump 35 and New ozone water is constantly supplied to the cleaning sample 17 via the injection valve switch 5. At the same time, the new ozone water is irradiated with ultraviolet rays to generate hydroxy radicals on the surface of the cleaning sample and the cleaning liquid, thereby continuing the cleaning sterilization. In addition, this cleaning liquid is affected by the turbulent flow plate 15 during circulation, and when the undegraded filth in the cleaning liquid and ozone water are mixed well and circulated in the cleaning tank, the cleaning liquid is effectively irradiated with ultraviolet rays. Oxidative decomposition with hydroxy radicals.

  Further, ozone is generated in the ozone generator 30 in response to an instruction from the control circuit 60 and supplied to the mixing pump 35 via the electromagnetic valve V10. Then, the circulating cleaning liquid and ozone are mixed to replenish ozone in the cleaning liquid consumed by disinfection and sterilization.

  By this circulation operation, it is possible to effectively perform a disinfection action using hydroxy radicals having higher sterilizing power than ozone water. Ozone water exerts its effect for several tens of minutes, but the effect of the hydroxy radical is only the moment when the hydroxy radical is generated and is not sustained. Therefore, when filth (organic matter, etc.) is mixed or mixed with ozone water in the washing tank, hydroxyl radicals are generated in the portion irradiated with ultraviolet rays, and strong oxidizing power and sterilizing power and Decomposing power will be demonstrated.

  Then, after the cleaning sterilization process is sufficiently performed on the cleaning sample 17, the ultraviolet lamp 14 in the cleaning tank is turned off again with reference to FIG. 2 (step S7). This stops the production of hydroxy radicals. Even when there is undecomposed dirt in the vicinity of the bottom in the cleaning tank, the accelerated oxidation method, that is, the purification action is performed in the next cleaning liquid treatment tank, so that it can be completely decomposed finally. Here, the densitometer 18 can be used to determine whether or not the cleaning has been sufficiently performed. Specifically, an absorptiometer that irradiates light into the liquid and determines the concentration from the absorbance is used as the densitometer. For example, the densitometer irradiates the cleaning liquid with light of a predetermined wavelength and measures the hydrogen peroxide concentration and the ozone concentration in the liquid from the absorbance. When the predetermined threshold value is exceeded, it can be determined that no further purifying action is performed and the cleaning and sterilization process is terminated.

  Next, the circulation of the cleaning liquid in the cleaning tank is stopped (step S8). Next, the cleaning liquid in the cleaning tank is processed in the cleaning liquid processing tank 20 (step S9). At this time, the solenoid valves V2, V4, V5 are opened in response to an instruction from the control circuit 60, and the filth and cleaning liquid accumulated in the cleaning tank are transferred to the cleaning liquid processing tank 20.

  FIG. 7 is a flowchart in the case of explaining the cleaning liquid process according to the embodiment of the present invention.

  Referring to FIG. 7, in the cleaning liquid processing system according to the embodiment of the present invention, the cleaning liquid processing is first started (step S20). Specifically, as described above, the cleaning liquid in the cleaning tank is sent into the cleaning liquid processing tank 20.

  Next, the ultraviolet lamp 21 in the cleaning liquid treatment tank 20 is turned on (step S21). When the ultraviolet lamp 21 is turned on, hydroxy radicals are generated from ozone water by irradiation of the ultraviolet lamp 21 as described above. Then, as described above, the hydroxyl radical is oxidatively decomposed with respect to the organic compound, and finally the contaminant is decomposed to molecules such as water, carbon dioxide gas, and oxygen to disappear. That is, the cleaning liquid can be completely purified and discharged as harmless water. Also in this case, the concentration meter 23 described above is used to measure the hydrogen peroxide concentration and the ozone concentration in the liquid from the absorbance, and based on the measurement results, the degree of progress of the purification action is determined, and the cleaning sterilization process is terminated. It can be determined.

  Next, the cleaning liquid in the cleaning liquid processing tank 20 is continuously circulated (step S22).

  FIG. 8 is a diagram for explaining the operation of the food cleaning and sterilizing apparatus when the cleaning liquid in the cleaning liquid treatment tank is circulated.

  Referring to FIG. 8, here, solenoid valves V5, V8, V10, V12 and V13 are opened in response to an instruction from control circuit 60, and the cleaning liquid in cleaning liquid processing tank 20 is passed through mixing pump 35. Circulated. At this time, the ozone generator 30 generates ozone in response to an instruction from the control circuit 60 and supplies the ozone to the mixing pump 35 via the electromagnetic valve V10. The cleaning liquid and ozone are mixed by the mixing pump 35. A turbulent flow plate 22 is disposed in the cleaning liquid treatment tank 20, and the cleaning liquid is circulated and stirred in the cleaning liquid treatment tank 20 so that the irradiation of the ultraviolet lamp 21 acts efficiently, and the organic compound is more easily decomposed or purified. Become. As will be described later, when this cleaning liquid treatment is being performed, a drying operation is performed in the cleaning tank, and the dryer 50 is in an ON state as shown in FIG. , V1 is also opened in response to an instruction from the control circuit 60.

  Then, after the cleaning liquid is sufficiently purified, referring again to FIG. 7, the ultraviolet lamp 21 in the cleaning liquid processing tank 20 is turned off in response to an instruction from the control circuit 60 (step S23). Thereby, the production | generation of a hydroxyl radical is stopped and it becomes only ozone water.

Then, the circulation of the cleaning liquid in the cleaning liquid processing tank 20 is stopped (step S24), and the cleaning liquid in the cleaning liquid processing tank is drained (step S25). In this case, it is assumed that the electromagnetic valve V7 is opened in response to an instruction from the control circuit 60. Ozone water is safe because it is naturally decomposed into water (H ₂ O) and oxygen (O ₂ ) and has no residual toxicity. Then, the cleaning liquid process is terminated (step S26). Note that the ozone decomposer 45 decomposes ozone as a gas in the cleaning liquid treatment tank 20 so that the ozone gas generated from the ozone water does not adversely affect the surroundings as described above. Exhausted to the outside.

  FIG. 9 is a flowchart for explaining a case where the drying operation is performed in the cleaning tank when the cleaning liquid is transferred to the cleaning liquid processing tank 20.

  With reference to FIG. 9, drying is started (step S10). Next, compressed air is sprayed onto the cleaning sample 17 in the cleaning tank (step S11). More specifically, the solenoid valves V0 and V1 are opened in response to an instruction from the control circuit 60, the dryer 50 is turned on, compressed air is sent to the washing tank, and the dried air is supplied to the inside of the washing tank. Injected toward the cleaning sample 17 in As a result, the water adhering to the cleaning sample 17 can be dried by removing it with wind pressure. And drying is complete | finished and a washing | cleaning sample is taken out from a washing tank (step S12). Not only compressed air but also ozone gas can be used. If ozone gas is used, a bactericidal action derived from ozone gas can also be expected.

  Note that the control circuit 60 turns off the dryer 50 after a predetermined period in the inside to end drying.

  In this example, the cleaning liquid is discharged from the cleaning tank to the cleaning liquid processing tank 20, and the cleaning liquid processing is performed in the cleaning liquid processing tank, and at the same time, the cleaning sample 17 is dried in the cleaning tank.

  Therefore, both operations can be performed simultaneously in parallel. Conventionally, there has been a case where the cleaning sample has to be dried after the cleaning liquid treatment in which the cleaning action is performed in the cleaning tank. Therefore, the cleaning of the cleaning sample can be completed more efficiently, and the cleaning sample can be cleaned and sterilized at an early stage.

  FIG. 10 is a flowchart illustrating a method for washing and sterilizing food according to a modification of the embodiment of the present invention.

  Referring to FIG. 10, step S0 to step S2 are the same as those described in FIG. After the cleaning tank opening / closing lid 11 is closed, in step S3a, ozone bubble water is injected into the cleaning tank for cleaning (step S3a).

  The ozone bubble water is obtained by converting ozone water into bubble water by the bubble generator 25.

  That is, it is an aqueous solution in which ultrafine bubbles are contained in ozone water. As a result, in the above embodiment, the two-stage configuration in which the ozone water is jetted after the bubble water is jetted is used. However, by using the ozone bubble water as in the modification of the present embodiment, the one-stage cleaning liquid is jetted. Thus, the cleaning sample 17 can be cleaned, the apparatus 1 can be operated efficiently, and the cleaning and sterilization action can be executed strongly by jetting the cleaning liquid in one stage, so that the cleaning sample can be quickly prepared. Cleaning and sterilization can be performed. Since subsequent steps S5 to S9 are the same as those in the embodiment described with reference to FIG. 2, detailed description thereof will not be repeated.

  Moreover, the fine bubbles of ozone bubble water are negatively charged. Generally, since the contaminant is positively charged, the accelerated oxidation treatment can be efficiently performed. That is, it becomes possible to attract contaminants to the gas-liquid interface, and the processing efficiency is improved. In addition, by confining ozone in fine bubbles, the distance between the cleaning sample and ozone becomes closer, allowing high-concentration ozone to act than dissolving ozone in the liquid, and performing accelerated oxidation treatment more efficiently Can do.

  In addition, although the system using ozone as fine bubbles has been described here, it is possible to improve the decomposition effect by confining oxygen, hydrogen and carbon dioxide gas depending on the drainage properties.

  FIG. 11 is a diagram for explaining experimental results when ozone water and hydroxy radicals (promoted oxidized water) are used for live bacteria.

  FIGS. 11A and 11B show cases where ozone water and hydroxy radicals are used, respectively. And the bath ratio is shown in the vertical direction, and the immersion time is shown in the horizontal direction. As shown here, in the case of 293,000 / g in the case of washing with water, it can be seen that in the case of ozone water, it takes less than 10,000 in 30 seconds. On the other hand, in the case of hydroxy radicals, it can be seen that the sterilizing power is further strong and less than 10,000 in 10 seconds.

  FIG. 12 is a diagram illustrating experimental results when ozone water and hydroxy radicals (promoted oxidized water) are used for E. coli.

  FIGS. 12A and 12B show the cases where ozone water and hydroxy radicals are used, respectively. And the bath ratio is shown in the vertical direction, and the immersion time is shown in the horizontal direction. As shown here, it can be seen that in the case of 82,000 / g in the case of washing with water and in the case of ozone water, it takes less than 10,000 in 10 seconds. On the other hand, in the case of hydroxy radicals, the sterilizing power is further strong, and after 10 seconds, the number is less than 1000.

  Accordingly, as described above, the cleaning and sterilization can be effectively performed by executing the cleaning and sterilization using the hydroxy radical (promoted oxidized water), and the time for the cleaning and sterilization can be shortened.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a figure which illustrates roughly the piping system diagram of the food washing | cleaning sterilization apparatus according to embodiment of this invention. It is a flowchart figure explaining the washing | cleaning sterilization method of the foodstuff according to embodiment of this invention. It is a figure explaining operation | movement of the food washing | cleaning sterilization apparatus 1 when wash | cleaning a washing | cleaning sample using bubble water. It is a figure explaining operation | movement of the food washing | cleaning sterilization apparatus 1 in the case of injecting to a washing | cleaning sample using ozone water. It is a figure explaining the oxidation potential which shows the oxidizing power of a typical oxidizing agent. It is a figure explaining the case where the ozone water which is a washing | cleaning liquid is circulated, and an ultraviolet-ray is irradiated within a washing tank and a hydroxy radical is generated. It is a flowchart figure in the case of explaining the washing | cleaning liquid process according to embodiment of this invention. It is a figure explaining operation | movement of the food washing | cleaning sterilization apparatus in the case of circulating the cleaning liquid in a cleaning liquid processing tank. FIG. 5 is a flowchart illustrating a case where a drying operation is performed in the cleaning tank when the cleaning liquid is transferred to the cleaning liquid processing tank 20. It is a flowchart figure explaining the washing | cleaning sterilization method of the foodstuff according to the modification of embodiment of this invention. It is a figure explaining the experimental result at the time of using ozone water and hydroxy radical (accelerated oxidation water) with respect to a general living microbe. It is a figure explaining the experimental result at the time of using ozone water and hydroxy radical (accelerated oxidation water) with respect to colon_bacillus | E._coli.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Food washing | cleaning sterilization apparatus, 5 injection valve switching device, 10 washing | cleaning sterilization tank, 11 washing tank opening / closing lid, 12 washing tank part, 14, 21 UV lamp, 15, 22 Turbulent flow plate, 16 mounting means, 17 washing | cleaning sample, 18 Densitometer, 20 Cleaning liquid treatment tank, 25 Bubble generator, 30 Ozone generator, 35 Mixing pump, 40, 45 Ozone decomposer, 50 Dryer, 60 Control circuit, V0 to V14 solenoid valve.

Claims (5)

A washing tank for washing food,
An injection unit for injecting a cleaning liquid containing ozone to the food stored in the cleaning tank at the time of cleaning ;
A cleaning tank for storing the cleaning liquid in the cleaning tank, and a cleaning liquid decomposition processing means for decomposing the cleaning liquid in the processing tank;
Drying means for spraying and drying gas on the food in the washing tank ,
The washing tank includes an ultraviolet lamp for irradiating ultraviolet rays,
The food is immersed in a cleaning liquid in a cleaning tank,
The said ultraviolet lamp is a food washing | cleaning sterilization apparatus which irradiates the said ultraviolet-ray with respect to the said washing | cleaning liquid at the time of the said washing | cleaning, and generates a hydroxyl radical.   The food washing and sterilizing apparatus according to claim 1, further comprising a bubble generating unit for dissolving the fine bubbled gas until the supersaturated state is obtained with respect to the cleaning liquid supplied to the ejection unit during the cleaning.   The food washing and sterilizing apparatus according to claim 1, further comprising a circulation means for supplying the cleaning liquid in the cleaning tank to the injection unit and circulating the cleaning liquid. The food cleaning and sterilizing apparatus according to claim 1, wherein the cleaning liquid decomposition processing means includes an ultraviolet lamp for irradiating the cleaning liquid in the processing tank with ultraviolet light . Spraying a cleaning liquid containing ozone on the food in the cleaning tank at the time of cleaning;
Irradiating the cleaning liquid in the cleaning tank with ultraviolet rays to generate hydroxy radicals;
Decomposing the cleaning liquid;
And a step of spraying a gas onto the food in the washing tank and drying the food.

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