JPH0856630A - Microbe breeding-preventive method and apparatus therefor - Google Patents

Abstract

PURPOSE: To provide a microbe breeding-preventive apparatus capable of generating ions in a gas with its temperature regulated to such a region higher or lower by a specified level than the optimal temperature region for actively breeding microbes and capable of increasing the ability to prevent microbial breeding by the gas containing the tons. CONSTITUTION: This apparatus is made up of a blower 2 for gas intake, a channel 3 through which a gas taken by the blower 2 is passed, a means 22 to control the temperature of the gas, an ion-generating chamber 21 to ionize the gas, and an ion feed chamber 28 having a space for housing an object for beeding microbes and to feed the temperature-controlled ionized gas into the space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention utilizes ions to
Food-related foods, cooking utensils, other food-related substances such as those necessary for ingestion, and a method for preventing the growth of microorganisms existing on the surface of an object which is required to prevent the growth of microorganisms in public health, and It relates to the device.

[0002]

2. Description of the Related Art FIG. 37 shows, for example, Japanese Patent Application No. 5-283762.
FIG. 2 is a configuration diagram showing a conventional microbial growth prevention apparatus shown in No. 1, in which 1 is an external gas, 2 is a fan (blower) that takes in the gas 1, and 3 is the gas 1 taken in by the fan 2. The air passage 4 is a supply port for taking in the gas 1, 5 is installed in the air passage 3, an ionization chamber for ionizing the gas 1 by ionizing electrons to the gas 1, and 6 is a bushing made of an insulating material. , 7 is a metal needle electrode made of a metal material such as tungsten, stainless steel, nickel, etc., 8 is a metal plate ground electrode arranged to face the metal needle electrode 7, and 9 is deposited or adhered on the metal plate ground electrode 8. A flat plate-shaped dielectric made of a dielectric material such as ceramic, glass, or quartz attached, 10 is an ionized gas containing ozone ionized by the ionization chamber 5, and 11 is the inside of the ventilation path 3. Is installed, the ionization chamber 5 to decompose ozone contained in the gas 10 that is ionized containing ozone, an ozonolysis chamber for removing ozone from gases 10 which are ionized containing the ozone, manganese dioxide,
It is filled with an ozone decomposition catalyst such as activated alumina. 1
2 is an insulator that electrically insulates the ozone decomposition chamber 11 from the ventilation passage 3, 13 is an ionized gas containing no ozone,
Reference numeral 14 denotes an object in which microorganisms propagate, 15 has a space for storing the object 14 in which microorganisms propagate, and the ozone decomposition chamber 11 allows the ionized gas 1 containing no ozone.
Ion processing chamber for supplying 3 to the space, 16 for high pressure generator, 17 for gas inlet for supplying ionized gas 13 containing no ozone to ion processing chamber 15, 18 for outside of ion processing chamber 15 It is a gas outlet for discharging the ionized gas 13 containing no ozone.

Next, the operation will be described. First, the fan 2 takes in the external gas 1 from the supply port 4 and guides it into the ionization chamber 5 through the ventilation passage 3. In the ionization chamber 5, a plurality of metal needle electrodes 7 and a space (gap length) between a metal plate ground electrode 8 attached in close contact with a dielectric 9 arranged to face the metal needle electrodes 7. When a high voltage of several kV is applied between both electrodes, a high electric field is applied to the vicinity of the tip of the metal needle electrode 7, and a discharge called corona discharge occurs. Then, when the gas 1 is introduced into the ionization chamber 5 during discharge, electrons collide with oxygen molecules and the like contained in the gas 1 to ionize the oxygen molecules and the like, so that the gas 1 contains ions.

However, since the external gas 1 contains oxygen molecules, ions are generated by corona discharge and ozone is also generated at the same time. By the way, since this ozone has a strong oxidizing power, it is harmful if the ozone concentration becomes high. Therefore, an ozone decomposing catalyst is arranged in the ionization chamber 5 so as to be electrically insulated from the ventilation passage 3 at the downstream side in the ventilation passage 3 through which the ionized gas 10 containing ozone flows. The ozone is removed from the ionized gas 10 containing the ozone to produce an ionized gas 13 containing no ozone.

The object 1 in which the microorganisms propagate the ionized gas 13 containing no ozone thus created.
4 is supplied to the ion processing chamber 15 having a space for storing 4 to suppress the growth of microorganisms attached to the object 14.

[0006]

Since the conventional microbial growth prevention device is constructed as described above, the ions generated from such a device have the effect of suppressing the growth of microorganisms. However, there is a problem that it is difficult to increase the ion concentration in the gas, so that the ions are not sufficiently supplied to the microorganisms attached to the object. In addition, there is a problem that the effect of suppressing the growth of microorganisms by using only ions is not sufficient.

The inventions of claims 1 and 2 have been made to solve the above problems, and generate ions in a gas whose temperature is controlled in a temperature range where the growth rate of microorganisms decreases. It is an object of the present invention to provide a method for preventing the growth of microorganisms, which can increase the ability to prevent the growth of microorganisms by the synergistic effect of temperature and ions.

The inventions of claims 3 and 4 are capable of generating ions in a gas whose temperature is regulated, and the synergistic effect of the temperature and the ions enhances the ability to prevent the growth of microorganisms. The purpose is to obtain the device.

According to a fifth aspect of the present invention, ions can be efficiently generated in a gas whose temperature is adjusted, and the temperature is adjusted in the space in which the object is stored without attenuating the ion concentration. An object of the present invention is to obtain a microbial growth prevention device capable of supplying an ionized gas containing ions.

According to the sixth and seventh aspects of the present invention, an ionized gas containing ions whose temperature is adjusted is supplied into the space in which a certain object is stored, and the microorganisms propagate in the object stored in the space. It is an object of the present invention to obtain a microbial growth prevention device capable of sufficiently preventing

According to an eighth aspect of the present invention, an ionized gas containing ions whose temperature is adjusted is supplied into the space in which a certain object is stored, and the ions are efficiently supplied to the surface of the object where the microorganisms propagate by the action of the electric field. An object of the present invention is to obtain a microbial reproduction prevention device that can be used.

According to a ninth aspect of the present invention, the temperature is regulated in the space in which a certain object is stored, a mixed gas containing ions and ozone is supplied, and the microorganisms grow due to the synergistic effect of temperature, ions, and ozone. It is an object of the present invention to provide a microbial growth prevention device capable of increasing the ability to prevent

According to a tenth aspect of the present invention, an ionized gas containing a temperature-controlled ion containing a high concentration of ions can be directly blown onto the surface of the object on which the microorganisms grow, and the microorganisms grow on the surface of the object. It is an object of the present invention to obtain a microbial growth prevention device capable of efficiently preventing the

According to the invention of claim 11, a temperature-controlled ionized gas containing a high concentration of ions can be directly blown onto the surface of an object on which the microorganisms propagate, and the object can be efficiently treated. The purpose is to obtain a breeding prevention device.

According to the twelfth to fourteenth aspects of the present invention, an ionized gas containing ions whose temperature is regulated can be emitted in various directions of a space in which a certain object is stored, and is stored in the space. An object of the present invention is to provide a microbial growth prevention device capable of sufficiently preventing the growth of microorganisms on the surface of an object.

It is an object of the invention of claim 15 to obtain a microbial growth preventing apparatus capable of removing static electricity accumulated on a wall surface in a space in which an object is stored.

According to the sixteenth aspect of the present invention, the ionized gas containing a high concentration of ions can be directly blown onto the surface of the heated object, and the synergistic effect of the temperature and the ions causes
An object of the present invention is to obtain a microbial growth prevention device capable of heating an object while efficiently preventing the growth of microorganisms on the surface of the object.

According to a seventeenth aspect of the present invention, the temperature of a certain liquid is adjusted, and the ionized gas is supplied into a water reservoir in which the temperature-adjusted liquid is stored, so that the microorganism is sufficiently propagated. It is an object of the present invention to obtain a microbial growth prevention device that can prevent the above.

According to the eighteenth aspect of the present invention, there is provided a microbial growth preventing apparatus capable of supplying an ionized gas into a water reservoir in which a certain liquid is stored and keeping only the ions in the liquid by the action of an electric field. With the goal.

[0020]

According to a first aspect of the present invention, there is provided a method for preventing microbial propagation, wherein an ionized gas containing ions is added in a temperature range lower or higher than an optimum temperature range in which the growth of microorganisms is active. The temperature is adjusted so that it is supplied to an object in which microorganisms propagate or a space for storing the object.

In the method for preventing microbial propagation according to the second aspect of the present invention, the temperature of the ionized gas containing ions is adjusted to a temperature range that is 10 ° C. or lower than the optimum temperature range where the growth of microorganisms is high. The microorganisms are supplied to an object or a space in which the object is stored.

According to a third aspect of the present invention, there is provided a device for preventing microbial proliferation, which is provided with a temperature control means for producing an ionized gas containing temperature-controlled ions.

In the microbial growth preventing apparatus according to the invention of claim 4, the temperature adjusting means is constituted by either or both of a cooler and a heater.

In the microbial growth preventing apparatus according to the fifth aspect of the present invention, the temperature adjusting means is installed upstream of the ion generating chamber.

According to a sixth aspect of the present invention, there is provided a device for preventing microbial growth, wherein an ionized gas containing ions, the temperature of which is adjusted by the temperature adjusting means, is supplied into a space for storing an object in which the microorganisms are to be propagated. Is.

According to a seventh aspect of the present invention, there is provided a device for preventing microbial proliferation, which has a space for storing an object in which microorganisms propagate, and supplies the space with an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means. An ion supply chamber is provided.

According to the eighth aspect of the present invention, there is provided an apparatus for preventing microbial growth, wherein ions in a gas containing ions whose temperature is adjusted by a temperature adjusting means are placed in an ion supply chamber having a space for storing an object in which microorganisms propagate. In addition, a pair of metal electrodes and a DC power supply that efficiently supply the surface of an object on which microorganisms propagate are provided.

According to a ninth aspect of the present invention, there is provided an apparatus for preventing microbial proliferation, which is provided with an ozone generator for generating ozone mixed with ionized gas containing ions whose temperature is adjusted by the temperature adjusting means.

According to a tenth aspect of the present invention, there is provided a microbial breeding prevention apparatus, which has a space for storing an object in which microorganisms propagate, and stores an ionized gas containing ions whose temperature is adjusted by a temperature adjusting means in the space. An ion supply unit is provided to directly spray the object.

According to the eleventh aspect of the present invention, there is provided an apparatus for preventing microbial growth, wherein the ion supply section includes an ion emission section for releasing an ionized gas containing ions whose temperature is adjusted by the temperature adjustment means, and the temperature adjusted ions. The transport device is configured to transport an object in which microorganisms propagate to the position where the ionized gas is released.

According to a twelfth aspect of the present invention, there is provided an apparatus for preventing microbial growth, wherein the ion supplying section changes the blowing direction of the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means, and releases the ionized gas. Is composed of an ion supply chamber having a space for storing an object that reproduces.

According to a thirteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus, which is provided in a blower for taking in gas, a ventilation passage through which the gas taken in by the blower passes, and the ventilation passage, and regulates the temperature of the gas. And a temperature control means for controlling the temperature of the gas, and an object in the ion supply chamber is provided with a microbial growth prevention device comprising an ion generation chamber that ionizes the gas whose temperature is controlled by the temperature control means. It is provided with a moving device for moving upward.

According to a fourteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus which includes, in the ion supply chamber, a position detecting device for recognizing the position of an object in which microorganisms are growing and ions whose temperature is adjusted by the temperature adjusting means. It is configured by a control device that instructs the blowing direction of the ionized gas to be the direction in which the object exists.

According to a fifteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus, which comprises an earth wire connected to a wall surface inside the ion supply chamber,
A switch is provided to open and close the contact between the ground wire and the grounding destination.

According to a sixteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus, which has a space for storing an object in which microorganisms propagate, and an ionized gas containing ions is directly blown to the object in the space in which microorganisms propagate. A pair of metal electrodes for heating an object in which microorganisms propagate from the inside and an AC power supply are provided in the ion supply unit thus supplied.

According to the seventeenth aspect of the invention, there is provided a device for preventing microbial growth, wherein the ionized gas containing ions is bubbled so as to be supplied into the liquid whose temperature in the water reservoir is adjusted.

According to the eighteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus, which is provided with a pair of metal electrodes for delaying the diffusion of ions in the ionized gas containing the ions from the liquid and a DC power source.

[0038]

According to the method of preventing microbial growth in the invention of claim 1, the temperature of the ionized gas containing ions is adjusted to a temperature range lower or higher than the optimum temperature range where the growth of the microorganisms is active, and By supplying this to the propagating object or the space storing the object, the ionized gas containing the temperature-controlled ions is supplied to the temperature range of the object or the space storing the object. Become so.

In the method for preventing microbial propagation according to the second aspect of the present invention, the predetermined temperature is set to 10 ° C. or higher, whereby the object in which the microorganisms propagate or the space for storing the object are
The ionized gas containing the temperature-controlled ions is supplied to the temperature region where the growth rate of the microorganisms decreases.

In the microbial growth preventing apparatus according to the third aspect of the present invention, the temperature of the ionized gas containing ions can be adjusted by providing the temperature adjusting means.

In the microbial growth prevention apparatus according to the invention of claim 4, the temperature adjusting means is constituted by either or both of the cooler and the heater, so that the temperature of the ionized gas containing ions can be adjusted. .

In the microbial growth prevention apparatus according to the fifth aspect of the present invention, since the temperature adjusting means is installed on the upstream side of the ion generating chamber, it is possible to prevent the ions from decreasing when adjusting the temperature. A temperature-controlled gas containing ions can be produced while maintaining a high concentration.

According to the sixth aspect of the invention, the apparatus for preventing microbial growth is configured so that the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means is supplied into the space for storing the object in which the microorganisms grow. , The ionized gas containing the temperature-controlled ions is supplied to the object.

According to a seventh aspect of the present invention, there is provided a device for preventing microbial growth, which has a space for storing an object in which microorganisms grow, and which supplies an ionized gas containing ions whose temperature is adjusted by a temperature adjusting means to the space. By providing the supply chamber, the ionized gas containing the temperature-adjusted ions is supplied to the object.

According to the eighth aspect of the present invention, the apparatus for preventing microbial growth is provided with a pair of metal electrodes for moving only the ions in the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means and the DC power source. Ions are efficiently supplied to the surface of an object on which microorganisms propagate.

According to the ninth aspect of the present invention, the microbial growth prevention apparatus is provided with an ozone generator for generating ozone for mixing with the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means. An ionized gas containing ozone whose temperature is adjusted is supplied to the space for storing the propagating object.

According to a tenth aspect of the present invention, there is provided a device for preventing microbial growth, which has a space for storing an object in which microorganisms grow.
By providing an ion supply unit for directly blowing the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means to the object stored in the space, the temperature adjusted high temperature is adjusted with respect to the object surface. An ionized gas containing a concentration of ions can be efficiently supplied.

According to the eleventh aspect of the present invention, there is provided an apparatus for preventing microbial growth, wherein the ion supply section releases an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means, and the temperature of an object in which microorganisms grow is adjusted. Since it is composed of a carrying device that carries the ionized gas containing the generated ions to the blowing position, the ionized gas containing the temperature-controlled high concentration ions is directly supplied to the surface of the object. .

According to a twelfth aspect of the invention, there is provided an apparatus for preventing microbial growth, which comprises an ion supply chamber having a space for storing an object in which microorganisms propagate, and an ionized gas containing ions whose temperature is adjusted by a temperature adjusting means. The temperature of the objects placed in various places in the ion supply chamber was adjusted by the ion emitting part that changes the direction of the air blow and emits it, and blows it directly to the objects stored in the space. A gas containing a high concentration of ions is intermittently sprayed.

The microbial growth prevention apparatus according to a thirteenth aspect of the present invention is provided with a blower for taking in a gas, a ventilation passage through which the gas taken in by the blower passes, and a ventilation passage provided in the ventilation passage to adjust the temperature of the gas. A movement for moving a microbial growth preventing device comprising a temperature adjusting means and an ion generating chamber for ionizing the gas whose temperature is adjusted by the temperature adjusting means by ionizing the gas to the upper side where an object is placed. By providing the device, the temperature-controlled ionized gas containing a high concentration of ions is intermittently supplied to the objects placed in various places in the ion supply chamber.

According to a fourteenth aspect of the present invention, there is provided a microbial breeding prevention apparatus which comprises a position detecting device for recognizing the position of an object in the ion supply chamber and a blowing direction of ionized gas containing temperature-controlled ions in the direction in which the object exists. By configuring with the control device instructing to change, it is possible to efficiently hit the object while keeping the ion concentration in the gas containing the temperature-adjusted ions high.

In the microbial breeding prevention apparatus according to the fifteenth aspect of the present invention, the ground wire connected to the inner wall surface of the ion supply chamber and the switch for opening and closing the contact point between the ground wire and the grounding destination are provided. It becomes possible to prevent the decrease of ions, and it is possible to remove static electricity accumulated on the inner wall surface of the ion supply chamber after the ion treatment.

According to the sixteenth aspect of the invention, the microbial growth preventing apparatus is provided with a pair of metal electrodes and an AC power source for heating an object in which the microorganisms grow, and can heat the object in which the microorganisms grow. The gas containing a high concentration of ions is directly supplied to the surface of the object.

In the microbial growth prevention apparatus of the seventeenth aspect of the present invention, the ionized gas containing ions is bubbled so that the temperature in the water reservoir is supplied to the regulated liquid. Can be suppressed from breeding.

In the microbial growth prevention apparatus according to the eighteenth aspect of the present invention, a pair of metal nets and a DC power source for preventing the ions supplied into the liquid from being diffused from the liquid are provided. You will be able to lengthen the time you stay inside.

[0056]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 1 of the present invention. In the figure, the same reference numerals as those of the conventional one indicate the same or corresponding portions, and therefore the description thereof will be omitted. Reference numeral 21 denotes an ion generating chamber that is installed in the ventilation path 3 and ionizes the gas 1 by ionizing electrons to the gas 1. Reference numeral 22 is installed upstream of the ion generating chamber 21 and has a fan (blower) 2 The temperature control chamber (temperature control means) 23 for controlling the temperature of the gas 1 taken in by the means 23 is a gas whose temperature is controlled in the temperature control chamber. The temperature control chamber 22 in the first embodiment is equipped with a heat exchanger 24 or the like for cooling the gas 1, and the heat exchanger 24 is connected to the cooler 25 by a pipe 26 through which a refrigerant or the like flows. Therefore, the gas 1 taken in by the fan 2
And the cooled gas 23 is introduced into the ion generation chamber 21. Further, 27 is an ionized gas containing ions whose temperature is controlled, 28 is a space for storing the object 14 in which microorganisms propagate, and the temperature control chamber 22
Ionized gas 27 containing ions whose temperature has been adjusted by
Is the ion supply chamber that supplies the space.

Next, the operation will be described. First, the fan 2 takes in the gas 1 outside the ion supply chamber 28 from the supply port 4 and guides it into the temperature control chamber 22 via the ventilation path 3. A heat exchanger 24 or the like for cooling the gas 1 is provided in the temperature control chamber 22, and a refrigerant or the like cooled in the cooler 25 flows through the pipe 26 in the heat exchanger 24. Therefore, the gas 1 taken in by the fan 2 is cooled to about 0 to 10 ° C., and the cooled gas 23
Will be guided to the ion generation chamber 21.

Gas 23 cooled in temperature control chamber 22
Are then supplied to the ion generation chamber 21. Since the ion generating chamber 21 is provided with a plurality of metal needle electrodes 7 and a metal plate ground electrode 8 arranged to face the metal needle electrodes 7, for example, the metal needle electrode 7 and the metal plate ground are provided. The distance from the electrode 8 (gap length) is set to several mm, and the metal needle electrode 7
When a negative DC pulse high voltage of several kV is applied to, a high electric field is applied to the vicinity of the tip of the metal needle electrode 7, and corona discharge occurs. Here, when the cooled gas 23 is introduced into the ion generating chamber 21 during discharge, electrons are attached to oxygen molecules and the like contained in the gas 23, the oxygen molecules and the like are negatively ionized, and the negative ions are cooled. It will be contained in the gas 23 thus generated.

Since the thermal energy released by the discharge that occurs in the ion generation chamber 21 is very small, the cooled gas 23 is not warmed by passing through the ion generation chamber 21, and , Air 0 to 1
Even if cooled to about 0 ° C. and supplied to the ion generation chamber 21, the amount of generated ions is not reduced, and negative ions can be generated in the cooled gas 23 while maintaining the cooled state. . At this time, even better effects can be obtained by cooling the air to 0 ° C. or lower. On the other hand, if oxygen molecules are contained in the cooled gas 23, ozone is also generated by the discharge, but as described above, in the case of discharge using a DC pulse high voltage, the amount of ozone generated is small and the ozone is cooled. The ozone concentration in the ionized gas 27 containing the generated ions was 0.01 ppm or less (below the detection limit of the JIS standard potassium iodide method).

The ionized gas 27 containing the cooled ions thus generated is released into the space inside the ion supply chamber 28. In the usual case, since air is supplied, the ionized gas 27 containing cooled ions is supplied. As a result, the ions are continuously supplied to the object 14 stored in the ion supply chamber 28, so that the proliferation of microorganisms on the surface of the object 14 can be suppressed.

Hereinafter, it will be described using experimental examples that the growth of microorganisms is suppressed by the ionized gas 27 containing cooled ions. Figure 2 shows the bacteria (Pseudomonas (Pseudomona) artificially planted on the agar medium.
s) a green petri dish containing a genus of green bacteria) in the ion supply chamber 2
It was installed in No. 8 and the effect of ion treatment was examined.
Here, the negative ion concentration in the ionized gas 27 containing the ions sent into the ion supply chamber 28 in which the petri dish is arranged was set to 10 ⁴ to 10 ⁵ / cm ³ . At this time, the voltage applied between the electrodes of the ion generation chamber 21 was 3 to 5 kV.
The temperature of the air 1 supplied to the ion generation chamber 21 is 10
The temperature and humidity are 80 to 90%, and the negative ion concentration is 10 ⁴ to 1
It was continuously treated with an ionized gas 27 containing cooled ions having an ozone concentration of 0.01 ppm or less at 0 ⁵ / cm ³ for 7 days. As a comparison item, 1 without generating ions
When treated with 0 ° C air, 20
When treated with air at ℃, temperature 20 ℃, negative ion concentration 10 ⁴ to 10 ⁵ / cm ³ , ozone concentration 0.01p
The case of treatment with an ionized gas of pm or less was added.

As shown in FIG. 2, the experimental result shows that, when treated with air at 20 ° C. without generating ions, the number of bacterial colonies after 7 days was about 400 cells / dish, indicating that ions were generated. Without treatment with air at 10 ° C, the bacterial colonies grew slower than at 20 ° C, but after 7 days, the bacterial colony count was about 40.
It was found that the number was 0 per dish, and the number of bacterial colonies finally did not change depending on the temperature of the gas supplied. As shown in FIG. 3, the temperature range in which the activity of the microorganism increases (the growth rate of the microorganism increases) varies depending on the type of the microorganism, but generally, when the temperature is lowered, the growth of the microorganism increases. This is due to the bacteriostatic action due to the low temperature, which is said to slow down.

On the other hand, at a temperature of 10 ° C. and a negative ion concentration of 10 ⁴ to
When treated with an ionized gas having a concentration of 10 ⁵ cells / cm ³ and an ozone concentration of 0.01 ppm or less, the number of bacterial colonies after 7 days was 0 cells / dishes, and the effect of completely suppressing the growth was obtained. Also, the temperature is 20 ° C and the negative ion concentration is 1
When treated with an ionized gas of 0 ⁴ to 10 ⁵ cells / cm ³ and an ozone concentration of 0.01 ppm or less, the number of bacterial colonies after 7 days was about 20 cells / dish, compared to the case of 10 ° C. It was confirmed that the growth-suppressing effect of sucrose was decreased.

When the ion-treated agar medium was left to stand at room temperature (about 20 ° C.) after stopping the ion-treatment, the temperature was 20 ° C. and the negative ion concentration was 10 ⁴ to 10 ⁵ cells / cm 2.
^{3. In} the agar medium treated with the ionized gas having an ozone concentration of 0.01 ppm or less, it was confirmed that the bacteria re-grown, but the temperature was 10 ° C. and the negative ion concentration was 10 ⁴ to 10 ^4.
No regrowth of bacteria was observed on the agar medium treated with ⁵ ions / cm ³ and an ionized gas having an ozone concentration of 0.01 ppm or less.

As described above, according to the above experimental results, in the bacteria planted in the agar medium, the effect of preventing the growth of microorganisms becomes greater than the case where the ionized gas 27 containing cooled ions is not cooled. It was confirmed that the bacteria were killed by the ionized gas 27 containing the cooled ions, due to the synergistic effect of reducing the temperature of the gas and the ions generated in the gas.

In FIG. 2, P which is an aerobic bacillus
The effect of negative ions was shown using bacteria of the genus Seudomonas, but similar effects were obtained also with other bacteria, for example, aerobic rods such as Escherichia coli and Salmonella which are the same members as the bacteria of the genus Pseudomonas. In addition, Staphylococcus aureus, which is an aerobic coccus having a different morphology, and Bacillus which is an aerobic bacillus that forms spores.
It is considered that the same effect can be obtained with respect to s) genus bacteria and the like and fungi such as fungi, and the growth can be suppressed.

This time, although the effect of suppressing the growth of microorganisms was shown by the negative ion treatment when the cooling temperature was 10 ° C. and the negative ion concentration was 10 ⁴ to 10 ⁵ pieces / cm ³ , it was supplied to the ion supply chamber 28. The negative ion concentration in the ionized gas 27 containing cooled ions and the temperature of the ionized gas 27 containing ions are preferably changed depending on the type of microorganisms present on the surface of the object 14 and the treatment method.

For example, taking an example of the effect of temperature, in the case of a low temperature bacterium such as Pseudomonas genus bacterium, when the temperature reaches 5 to 10 ° C., compared with the case of 20 to 30 ° C. (optimum growth temperature region) The growth rate is 1/10
In the case of mesophilic bacteria such as Escherichia coli, when the temperature reaches 15 to 20 ° C, the growth rate decreases to about 1/10 as compared to the case of 35 to 45 ° C (optimum growth temperature range). Also, Bacillus circulans (Bacillus
In thermophilic bacteria such as s circulans bacteria, when the temperature reaches 25 to 30 ° C., the growth rate decreases to about 1/10 as compared with the case of 50 to 60 ° C. (optimum growth temperature region). It has been known that the growth rate varies depending on the type of the same even at the same temperature, and it is necessary to determine the cooling temperature of the ionized gas 27 containing ions in consideration of such a fact. However, in the normal case, in any bacterium such as a psychrophilic bacterium, a mesophilic bacterium, and a thermophilic bacterium, the temperature of the gas is adjusted to 10 ° C. or less at which the growth rate is 1/10 or less, and negative ions are generated in the gas. Therefore, it is effective to suppress the growth of microorganisms.

Regarding the treatment method, the cooling temperature of the ionized gas 27 containing ions is further lowered to 0 ° C. or lower, or the negative ion concentration is further raised to 10 ⁶ to 10 ⁷ / cm ³ . The ion treatment time may be further shortened to effectively prevent the growth of microorganisms.

In the first embodiment described above, the effect of treating with the ionized gas 27 containing the cooled negative ions was shown, but the metal needle electrode 7 in the ion generating chamber 21 has a positive polarity. A similar effect can be obtained by applying a DC pulse high voltage to generate positive ions and supplying the positive ions to the ion supply chamber 28, but negative ions are more proliferative to microorganisms than positive ions. The effect of preventing is great.

In the above embodiment, the cooling device 25 is used to cool the gas. However, as shown in FIG. 4, the cooling heat exchanger 24 and the heating device 24 are provided in the temperature control chamber 22. A heating resistor 29 is provided, and the cooler 25 connected to the cooling heat exchanger 24 and the heating resistor 29 are turned on.
It may be turned off to cool the gas.

Furthermore, in the above experimental example, an example in which the metal flat plate ground electrode 8 arranged so as to face the metal needle electrode 7 was provided in the ion generation chamber 21, was shown as shown in FIG. , The ion generation chamber 21 has a diameter of 0.1 to 0.2.
Discharge that occurs when a plurality of thin metal wires 30 having a size of about mm and a metal grid-shaped ground electrode 31 arranged to face the thin metal wires 30 are provided, and a negative DC pulse high voltage is applied to the thin metal wires 30 Also had the same effect.

Example 2. In the first embodiment, the gas 1 outside the ion supply chamber is supplied to the temperature control chamber 22, and the cooled gas 23 is sent to the ion generation chamber 21 so that the temperature control chamber 22 is located upstream of the ion generation chamber 21. Although the example of the case where it is provided is shown, as shown in FIG. 6, even if the temperature control chamber 22 is installed on the downstream side of the ion generation chamber 21,
A cooled ionized gas 27 containing ions can be generated. However, when the temperature control chamber 22 is installed on the downstream side of the ion generation chamber 21, the ion generation chamber 2
Since some of the ions generated in 1 collide with the heat exchanger 24 and the like in the temperature control chamber 22, the ions disappear, so compared with the case where the temperature control chamber 22 is provided on the upstream side of the ion generation chamber 21, The ion concentration in the ionized gas 27 containing the cooled ions decreases. Therefore, in order to efficiently supply the ionized gas 27 containing the cooled ions into the ion supply chamber 28, it is desirable to install the temperature control chamber 22 on the upstream side of the ion generation chamber 21. The object 14 stored inside the supply chamber 28 can be processed.

Example 3. In the first embodiment, the gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2 and is cooled to about 0 to 10 ° C. therein, and then includes the ions cooled from the ion generation chamber 21. The object 1 stored in the ion supply chamber 28 as the ionized gas 27
4 is continuously supplied to prevent the microorganisms from propagating on the surface of the object 14, but as shown in FIG. 7, the gas 1 in the ion supply chamber 28 is heated by the fan 2. The object 14 is treated by the ionized gas 27 containing the cooled ions in the ion supply chamber 28 so as to be discharged into the adjustment chamber 22 as the ionized gas 27 containing the cooled ions from the ion generation chamber 21. The cooled gas 32 whose ion concentration has been attenuated is then returned to the fan 2 again.
Thus, even if the ionized gas 27 containing the cooled ions is refluxed by being sent to the temperature control chamber 22, a constant amount of ions is continuously supplied from the ion generation chamber 21 into the ion supply chamber 28. By feeding, the effect of preventing the growth of microorganisms can be obtained. In addition, after cooling the gas to 0 ° C. or lower, the gas is fed into the ion generation chamber 21 to
It is even more effective if the ionized gas 27 containing cooled ions is refluxed below. Further, by refluxing the gas 1, the energy required for cooling the gas 1 can be reduced as compared with the case where the ionized gas 27 containing the cooled ions is produced from the external gas 1.

In the above-mentioned third embodiment, an example in which the gas 1 in the ion supply chamber is circulated and used is shown. However, as shown in FIG. Even if the space inside the supply chamber 28 is cooled and the ionized gas 13 containing no ozone is supplied from the ion generation chamber 21, the object 14 is treated with the ionized gas 27 containing the cooled ions. can do. However, when the air conditioner 33 is provided inside the ion supply chamber 28, some of the ions supplied to the inside of the ion supply chamber 28 are taken into the air conditioner 33, and the heat exchanger 24 and the like inside the air conditioner 33. Since it disappears by colliding with the metal object, the amount of ions used to suppress the growth of microorganisms decreases. Therefore, after the ionized gas 27 containing the cooled ions is supplied into the ion supply chamber 28 to treat the object 14 stored in the ion supply chamber 28 with the ions, the temperature control chamber 22 and the ion generation chamber are again supplied. Two
It is desirable to circulate the gas 1 in the order of 1, and the generated ions can be efficiently used for preventing the growth of microorganisms.

Example 4. In the first embodiment, the gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2 and is cooled to about 0 to 10 ° C. therein, and then includes the ions cooled from the ion generation chamber 21. The object 1 stored in the ion supply chamber 28 as the ionized gas 27
4 is continuously supplied to prevent the microorganisms from propagating on the surface of the object 14, but as shown in FIG. 9, the temperature of the gas 1 outside the ion supply chamber 28 is adjusted by the fan 2. The heating resistor 29 is supplied to the chamber 22.
The heated gas 23 may be sent to the ion generation chamber 21 by heating to 60 ° C. or higher by the above, and the ionized gas 27 containing the heated ions may be released into the ion supply chamber 28. Proliferation can be prevented.

The temperature in the ionized gas 27 containing the heated ions supplied into the ion supply chamber 28 depends on the temperature of the object 14
Depending on the type of microorganisms present on the surface,
Raise the temperature of gas 1 to a temperature at which the activity of microorganisms becomes weak,
If the ion concentration is 10 ⁴ to 10 ⁵ ions / cm ³ , the temperature is not adjusted and the ozone-free ionized gas 1
Compared with the case where 3 is used, the ability to prevent the reproduction of microorganisms can be enhanced.

For example, in the case of a low temperature bacterium such as Pseudomonas genus bacterium, when the temperature reaches 35 to 40 ° C., 2
Compared with the case of 0 to 30 ° C. (optimum growth temperature region), the growth rate is reduced to about 1/10, and in the case of mesophilic bacteria such as Escherichia coli, when the temperature is 45 to 50 ° C., it is 35 to 45 ° C.
Compared to the case of ℃ (optimum growth temperature range), the growth rate is 1
It decreases to about / 10, and the Bacillus cir
In thermophilic bacteria such as culans bacteria, the temperature is 60 to 65 ° C.
Then, compared with the case of 50 to 60 ° C (optimum growth temperature region), the growth rate decreases to about 1/10, and it is clear that the growth rate differs depending on the type of microorganism even at the same temperature. In consideration of this, it is necessary to determine the heating temperature of the ionized gas 27 containing ions and treat it with negative ions. However, in the normal case, in any bacteria such as psychrophilic bacteria, mesophilic bacteria and thermophilic bacteria, the temperature of the gas is adjusted to 60 ° C. or higher at which the growth rate is 1/10 or less, and negative ions are generated in the gas. Therefore, it is effective to suppress the growth of microorganisms.

In the above embodiment, the heating resistor 29 is used to heat the gas. However, the heat exchanger 24 for cooling and the heating resistor 29 for heating are provided in the temperature control chamber 22. Alternatively, the gas may be heated by turning on and off the cooler 25 connected to the heat exchanger 24 for cooling and the heating resistor 29 for heating.

Example 5. FIG. 10 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 5 of the present invention. In the figure, 34 is a temperature sensor for measuring the temperature of the gas 1 sent to the ion generation chamber 21, and 35 is a temperature sensor 34 for measuring. Temperature control chamber 2
2 and the ion generation chamber 21 are control devices that send output signals.

Next, the operation will be described. First, the fan 2 takes in the external gas 1 from the supply port 4 and guides it into the temperature control chamber 22 through the ventilation passage 3. In the temperature adjusting chamber 22, the temperature of the gas 1 taken in by the fan 2 is adjusted, and the temperature-adjusted gas 23 is guided to the ion generating chamber 21.

The temperature sensor 34 installed in the ventilation passage 3 connecting the temperature control chamber 22 and the ion generation chamber 21 detects the temperature of the temperature-controlled gas 23 and sends an electric signal to the control device 35. The control device 35 receiving the electric signal sends the electric signal to the ion generating chamber 21. Then, the value of the negative DC pulse high voltage applied to the plurality of metal needle electrodes 7 provided in the ion generation chamber 21 is changed, and the generation amount of negative ions is changed. As a result, an appropriate amount of negative ions can be generated in the temperature-controlled gas 23 in accordance with the temperature of the gas 23 sent to the ion generation chamber 21, and the ionized gas 27 containing the temperature-controlled ions is generated.
Thereby, the growth of microorganisms can be efficiently prevented.

In the above embodiment, the value of the negative DC pulse high voltage applied to the metal needle electrode 7 is changed by the output signal of the controller 35, but the value of the pulse frequency of the DC pulse high voltage is changed. Even if it is changed, the amount of negative ions generated can be changed.

Further, in the above embodiment, the value of the negative DC pulse high voltage applied to the metal needle electrode 7 is changed by the output signal of the controller 35. However, the rotation speed of the fan 2 is changed. Then, the amount of negative ions generated can also be changed by changing the velocity of the gas passing between the electrodes in the ion generation chamber 21.

Example 6. FIG. 11 is a block diagram showing a microbial breeding preventive apparatus according to Embodiment 6 of the present invention. In the figure, 36 is a metal plate ground electrode installed on the floor of the ion supply chamber 28, and 37 is the ion supply chamber 28. A metal plate electrode installed on the ceiling surface of the metal plate 38 is a DC voltage generator for applying a DC voltage to the metal plate electrode 37.

Next, the operation will be described. The gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2, where 0 to 10 ° C. is set by the heat exchanger 24 for cooling.
After being cooled to a certain degree, the ion generation chamber 21 is cooled as in the first embodiment.
The ionized gas 27 containing the cooled ions is released into the space inside the ion supply chamber 28. In the normal case, since air is supplied, the cooled ionized gas 27 is supplied. Next, the ionized gas 27 containing the cooled ions
Is sent into the ion supply chamber 28, a negative DC voltage is applied from the DC voltage generator 38 to the metal plate electrode 37 installed on the ceiling surface. When a negative DC voltage is applied to the metal plate electrode 37, an electric field is generated from the floor surface to the ceiling surface, and when the ionized gas 27 containing the cooled ions flows into the electric field, the cooled ions are removed. Only the negative ions in the containing ionized gas 27 move downward,
It is supplied to the surface of the object 14 placed in the electric field. As a result, only negative ions can be efficiently supplied to the surface of the object 14, and the growth of microorganisms attached to the surface of the object 14 can be prevented.

The value of the DC voltage applied to the flat metal plate electrode 37 provided on the ceiling surface depends on the mobility of the ions colliding with the object 14, the flat metal plate electrode 37 on the ceiling surface and the flat metal plate electrode on the floor surface. It can be determined from the distance between 36 and the velocity of the ions when they collide with the object 14. For example, when an O ₂ ⁻ ion having a mobility of 2 cm ² / volt · sec is to collide with the object 14 at a speed of 20 cm / sec, the flat metal plate electrode 37 on the ceiling surface and the flat metal plate electrode 36 on the floor surface are used. Is 3 m from the DC voltage generator 38 to the metal plate electrode 37 on the ceiling surface.
It is advisable to apply a negative DC voltage.

In the above embodiment, only the negative ions are applied to the object 14
However, when the positive ions are made to collide with the object 14, a positive DC voltage may be applied to the metal plate electrode 37 provided on the ceiling surface.

In the above embodiment, the negative ions in the ionized gas 27 containing the cooled ions are moved by the electric field, but the negative ions in the ionized gas 27 containing the heated ions are moved by the electric field. It may be moved to collide with the object 14 to prevent the growth of microorganisms attached to the object 14.

Further, in the above-mentioned embodiment, the one in which the ions are moved by using the electric field has been shown, but only the ions are supplied to the surface of the object 14 by using the magnetic field so that the microorganisms attached to the object 14 are proliferated. It may be prevented.

Example 7. FIG. 12 is a configuration diagram showing a microbial breeding preventive apparatus according to Embodiment 7 of the present invention. In the figure, 39 is an ozone generator for generating ozone, 40 is the cooled air 23 for ozone generator 39 and an ion generating chamber. 21
Is a two-way branch pipe, 41 is an insulating pipe (gas mixer) for mixing ozone generated by the ozone generator 39 with ions, and 42 is a cooled ionized gas containing ozone.

Next, the operation will be described. The air 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2. Therefore, the gas 23 cooled to about 0 to 10 ° C. by the cooling heat exchanger 24 is supplied to the ion generation chamber 21 and the ozone generator 39 through the two-way branch pipe 40. The cooled gas 23 supplied to the ion generation chamber 21 becomes an ionized gas 27 containing the cooled ions in which ions are generated by the corona discharge, while the cooled gas 23 supplied to the ozone generator 39. In this, ozone is generated. The ionized gas 27 containing the cooled ions and the ozone in the cooled gas 23 are mixed by the insulating pipe 41 to become the cooled ionized gas 42 containing the ozone, and the object 14 in which the microorganisms have propagated is stored. It is released into the space inside the ion supply chamber 28 and prevents the growth of microorganisms on the surface of the object 14.

Although ozone can be used alone as a bactericidal agent, ozone has a strong oxidizing power and is harmful when the ozone concentration exceeds a certain value. It is desirable to set the ozone concentration to about 0.03 ppm, which is legally considered to be no problem for humans. However, in the cooled ionized gas 42 containing ozone, even if the ozone concentration is in the low concentration region of 0.03 ppm, only the ions are supplied due to the synergistic effect of the ozone and the ions.
The ability to prevent the growth of microorganisms can be improved as compared with the case of supplying the same inside. If the object 14 is not easily discolored or deteriorated by ozone, the ozone concentration is increased to about 0.1 ppm and the object 14 is treated in a short time by using the cooled ionized gas 42 containing ozone. Good. This can enhance the ability to prevent the growth of microorganisms attached to the surface of the object 14.

Further, in the above-mentioned embodiment, the one in which the growth of microorganisms is prevented by the synergistic effect of ozone in the ionized gas 42 containing cooled ions containing ozone and ozone is shown. Ions and ozone in the ionized gas 42 may be used to prevent the growth of microorganisms attached to the object 14.

Furthermore, in the above embodiment, the cooled gas 23 is supplied to the ozone generator 39 by the two-way branch pipe 40.
And the ion generation chamber 21 and then mixed by the insulating pipe 41 to produce the ionized gas 42 containing cooled ions containing ozone. The metal needle electrode 7 in the ion generation chamber 21 was shown. A negative DC voltage is applied to the negative electrode to generate both negative ions and ozone in the ion generation chamber 21,
Ionized gas containing cooled ions containing ozone 4
2 may be created. However, in this case, since a negative DC voltage is applied to the metal needle electrode 7 from the same power source, it is difficult to freely change the generation ratio of negative ions and ozone.

Example 8. FIG. 13 is a configuration diagram showing a microbial breeding preventive apparatus according to Embodiment 8 of the present invention. In the figure, 43 is an ion supply unit installed on the downstream side of the ion generation chamber 21.

Next, the operation will be described. External gas 1
Is supplied to the temperature control chamber 22 by the fan 2, and is cooled there to about 0 to 10 ° C. by the heat exchanger 24 for cooling. The cooled gas 23 is ionized in the ion generation chamber 21, becomes an ionized gas 27 containing the cooled ions, and is guided to the ion supply unit 43. In the normal case, since air is supplied, the ionized gas 27 containing cooled ions is introduced. At the position where the ionized gas 27 containing the cooled ions in the ion supply unit 43 is blown out,
When the object 14 on which the microorganisms are attached is placed, the ionized gas 27 containing the cooled ions is directly sprayed on the object 14 while maintaining a high concentration, whereby the object 14 It is possible to efficiently prevent the growth of microorganisms on the surface.

Here, an example of an experiment in which the life of negative ions generated in the microbial growth preventing apparatus in Example 8 is examined will be described. In this experimental example, five metal needle electrodes 7 having a length of 5 mm are arranged at intervals of 7 mm.
And the gap length (distance between electrodes) of the metal flat-plate ground electrode 8 having a width of 1 cm and a length of 3 cm is 10 mm, the DC high voltage applied to the metal needle electrode 7 is 5 kV, and the wind speed of the air passing between both electrodes is approximately The temperature of the supplied air is 20 ° C. and the humidity is 60%.

Under these conditions, negative ions are generated, the distance between the ion supply unit 43 and the ion concentration measuring unit is changed, and the ion concentration in the ionized gas 27 containing the temperature-controlled ions is measured. As a result of examining the lifetime of ions, when the negative ion concentration is about 10 ⁶ / cm ³ , about 10 ⁵ / cm ³
The time required for the concentration to drop to cm ³ is about 10 seconds, and when the negative ion concentration is about 10 ⁵ / cm ³ , it takes about 10 ⁴ / cm ^3. It was confirmed that the time was about 30 seconds. In this way, the life of the negative ions in the ionized gas 27 containing the temperature-controlled ions becomes shorter as the concentration becomes higher,
The ionized gas 27 containing the temperature-controlled ions is supplied to the object 1
By directly spraying on the surface, the object 14 can be treated with a high concentration of negative ions, and the growth of microorganisms can be efficiently prevented.

Further, in the above embodiment, the case where the ionized gas 27 containing the cooled ions is directly blown to the object 14 to prevent the growth of the microorganisms is shown.
The ionized gas 27 containing ions heated to about 0 ° C. may be blown directly onto the object 14 to prevent the growth of microorganisms attached to the object 14.

Furthermore, in the above embodiment, the ionized gas 27 containing cooled ions was sprayed directly onto the object 14 to prevent the growth of microorganisms. However, the ionized gas 27 containing cooled ions is shown. Alternatively, ozone may be added to the object 14 to blow the ionized gas 42 containing cooled ions containing ozone directly onto the object 14 to prevent the growth of microorganisms attached to the object 14.

Example 9. FIG. 14 is a block diagram showing a microbial growth prevention apparatus according to Embodiment 9 of the present invention. In the figure, 44 has a space for storing an object 14 in which microorganisms grow and the temperature is controlled by a temperature control chamber 22. The inner surface for supplying the ionized gas 27 containing negative ions to the space is an air passage made of an insulating material.

Next, the operation will be described. The gas 1 outside the air passage 44 is supplied to the temperature control chamber 22 by the fan 2,
Then, the cooling heat exchanger 24 cools it to about 0 to 10 ° C., and the ionized gas 27 containing the cooled ions is discharged from the ion generation chamber 21 to the space in the air passage 44 as in the first embodiment. In the usual case, air is supplied, so cooled ionized air is supplied. When the object 14 having microorganisms on its surface is placed in the air passage 44, the ionized gas 27 containing the cooled ions is directly blown to the object 14 while maintaining a high concentration. Become. As a result, at the same time that the object 14 is cooled, the growth of microorganisms on the surface of the object 14 can be prevented by the ionized gas 27 containing ions containing a high concentration of negative ions.

Even if a shelf made of an insulating material is provided on the floor so that the object 14 is electrically insulated from the air passage 44, the same effect as when the entire inner surface of the air passage 44 is made of an insulating material is obtained. Is obtained. Furthermore, the temperature of the gas supplied to the ion generation chamber 21 is below the freezing point, while the growth of microorganisms on the surface of the object 14 is prevented, the object 14 is frozen or the temperature of the gas supplied to the ion generation chamber 21 is set to 60 ° C. or higher. ,
While preventing the growth of microorganisms on the surface of the object 14,
The object 14 can be heated.

Example 10. FIG. 15 is a first embodiment of the present invention.
FIG. 2 is a configuration diagram showing a microbial growth prevention device according to 0, in which 45 is an ion processing unit that blows ions onto the object 14, 46 is installed so as to pass through the ion processing unit 45, and microorganisms propagate. It is a belt conveyor that carries the object 14.

Next, the operation will be described. First, in the ion processing unit 45, the external gas 1 is supplied to the temperature control chamber 22 by the fan 2 and is cooled to about 0 to 5 ° C. by the heat exchanger 24 for cooling therein, as in the first embodiment. Ionized gas 27 containing cooled ions is released from the ion generation chamber 21. Further, the belt conveyor 46 carries the object 14 on which microbes are attached and carries the object 14 into the ion processing unit 45. Ion processing unit 4
Within 5, the ionized gas 27 containing cooled ions with a negative ion concentration of 10 ⁶ to 10 ⁷ / cm ³ is present in the body 1
The microorganisms that have been sprayed on the surface of the object 4 and are propagated on the surface of the object 14 are killed, and then carried out of the ion processing unit 45 by the belt conveyor 46. This allows
The short-time treatment of the ionized gas 27 containing cooled ions containing a high concentration of negative ions can effectively prevent the growth of microorganisms on the surface of the object 14.

Here, in the ion processing section 45, the thing which prevents the growth of microorganisms on the surface of the object 14 while cooling the object 14 with the ionized gas 27 containing the cooled ions is shown. The object 1 is sprayed with the ionized gas 27 containing the same onto the surface of the object 14.
It is possible to prevent microorganisms from propagating on the surface of the object 14 while warming the object 4.

In the above embodiment, the ionized gas 27 containing cooled ions is directly sprayed on the object 14 to prevent the growth of microorganisms. Ozone may be added to blow the ionized gas 42 containing cooled ions containing ozone directly onto the object 14 to prevent the growth of microorganisms adhering to the object 14.

Example 11. 16 shows a first embodiment of the present invention.
1 is a configuration diagram showing a microbial growth prevention device according to No. 1, in which 47 is installed in an ion supply chamber 28 and
4 is a turntable for rotating 4.

Next, the operation will be described. The object 14 is placed on the turntable 47 installed in the ion supply chamber 28. Next, the gas 1 in the ion supply chamber 28 is replaced by the fan 2
Is supplied to the temperature control chamber 22 by the heating resistor 29 and heated to about 60 ° C. by the heating resistor 29, and the ionized gas 27 containing the heated ions is discharged from the ion generation chamber 21 into the space from one direction. When the ionized gas 27 containing heated ions begins to be released, the turntable 4
7 starts to rotate, and the ionized gas 27 containing the heated ions is uniformly applied to the object 14. As a result, it is possible to prevent the growth of microorganisms adhering to the surface of the object 14 while the object 14 is uniformly warmed. Further, when the object 14 is frozen, the ionized gas 27 containing ions cooled to 10 ° C. or lower prevents the growth of microorganisms adhering to the surface of the object 14 while uniformly thawing the object 14. be able to.

Example 12. FIG. 17 is a first embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 2, In the figure, 48 is a storage tank which stores the object 14, 49 is a storage tank.
Is a rotary blade that agitates the object 14 stored in the storage tank 48.

Next, the operation will be described. First, the object 14 containing water is put into the storage tank 48. Next, the external gas 1 is supplied to the temperature control chamber 22 by the fan 2,
Then, the ionization gas 27 containing the heated ions is supplied from the ion generating chamber 21 into the storage tank 48 by being heated to 60 ° C. or higher by the heating resistor 29. When the ionized gas 27 containing heated ions is supplied to the storage tank 48,
The rotor blades 49 installed in the storage tank 48 start to rotate,
The object 14 is agitated so that the ionized gas 27 containing the heated ions is uniformly applied to the object 14.
Thereby, the ionized gas 27 containing the heated ions
While removing moisture evenly from all objects 14, object 1
4 It is possible to prevent the growth of microorganisms attached to the surface.

In the above embodiment, the ionized gas 27 containing heated ions is directly sprayed on the object 14 to prevent the growth of microorganisms. Ozone may be added and the ionized gas 42 containing heated ions containing ozone may be blown directly onto the object 14 to prevent the growth of microorganisms adhering to the object 14.

Example 13 In the twelfth embodiment, the ionized gas 27 containing the heated ions dries the object 14 in the storage tank 48 and, at the same time, prevents the growth of microorganisms adhering to the surface of the object 14 and then is released into the space. As described above, as shown in FIG. 18, after the ionized gas 27 containing heated ions passes through the storage tank 48,
The water in the ionized gas 27 containing the ions that have been sent to the drying chamber 50 and heated therein is removed, and the temperature control chamber 2
It may be refluxed to 2. As a result, the amount of heat required to heat the air can be reduced.

Example 14 FIG. 19 shows the first embodiment of the present invention.
4 is a configuration diagram showing a microbial breeding prevention device according to No. 4, in which 51 is an ion emission unit installed on the downstream side of the ion generation chamber 21, 52 is provided in the ion emission unit 51,
A guide plate whose surface portion is made of an insulating material and 53 is a drive for automatically moving the guide plate 52 whose surface portion is made of an insulating material by changing the blowing direction of the ionized gas 27 containing the temperature-controlled ions. It is a motor.

Next, the operation will be described. The gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2 and the temperature thereof is controlled, and the ionized gas 27 including the temperature-controlled ions is ionized from the ion generation chamber 21 as in the first embodiment. The ion emitting portion 5 is guided to the emitting portion 51.
The guide plate 52 installed in the inside of 1 is a drive motor 53.
The ion supply chamber 28 is moved by changing the blowing direction of the ionized gas 27 containing the temperature-controlled ions.
The object 14 discharged inside and placed in a part of the ion supply chamber 28 is sprayed with an ionized gas 27 containing ions whose temperature is adjusted intermittently in accordance with the movement of the guide plate 52. In the present invention, the ionized gas 27 containing the temperature-adjusted ions is directly blown from the ion emitting unit 51 onto the surface of the object 14 in which the microorganisms are propagated, so compared with the case where the ionized gas 27 is released into the space inside the ion supply chamber 28. The ionized gas 27 containing a high concentration of negative ions can reach the surface of the object 14 intermittently. Therefore, the ionized gas 27 containing temperature-controlled ions containing a high concentration of negative ions can be intermittently supplied to the objects 14 placed in various places in the ion supply chamber 28, and many objects 14 can be supplied. It is possible to effectively prevent the growth of microorganisms on the surface.

The concentration of negative ions in the ionized gas 27 containing the temperature-controlled ions that are sprayed onto the object 14 in the ion supply chamber 28 depends on the type of microorganisms existing on the surface of the object 14 and the temperature in the ion supply chamber 28. , It depends on the conditions such as humidity, but according to the experimental results, if it is a continuous process,
The amount of 10 ⁴ to 10 ⁵ cells / cm ³ has a large effect of preventing the growth of microorganisms and is economical. However, since the present invention is an intermittent treatment, the negative ion concentration is increased to 10 ⁶ to 10 ⁷ pieces / cm ³ in consideration of the fact that the higher the negative ion concentration, the greater the effect of suppressing the growth of microorganisms. It is desirable to perform the above, and thereby, a sufficient effect of preventing the growth of microorganisms can be obtained and the processing efficiency of the object 14 can be improved.

Next, as a result of investigating the effect of preventing the growth of microorganisms by intermittently spraying the ionized gas 27 containing the temperature-adjusted ions on the object 14, for example, negative ion concentration 10 ⁴ to 10 ⁵ When the ionized air 27 of which the ozone concentration is 0.01 ppm or less and the temperature is 20 ° C. at the number of particles / cm ³ is subjected to the intermittent treatment in the 6-minute cycle of the ion treatment for 1 minute and the stop of the ion treatment for 5 minutes, continuous treatment is performed. Although it was slightly lower than that of the above, it was found that almost the same effect of inhibiting microbial growth was obtained.

However, for example, in the case where the intermittent treatment of 30 minutes cycle of 5 minutes of ion treatment and 25 minutes of ion treatment is performed, the intermittent treatment of 6 minutes cycle of the above 1 minute of ion treatment and 5 minutes of ion treatment is performed. It was confirmed that the effect of suppressing the growth of microorganisms was reduced as compared with the case of From this, it was confirmed that even if the ion treatment time was the same as the total time, the longer the ion treatment stop time was, the lower the ability to prevent the growth of microorganisms was installed. It has been found that it is effective to move the guide plate 52 as fast as possible to change the blowing direction of the ionized gas 27 containing the temperature-controlled ions as quickly as possible, and it is highly effective in preventing the growth of microorganisms.

As described above, the space for storing the object 14 in which microorganisms propagate the ionized gas 27 containing the temperature-controlled ions by intermittently directly spraying the ionized gas 27 containing the temperature-controlled ions onto the object 14. It was confirmed that, compared with the case where the substance is released into the atmosphere, since a high concentration of negative ions can be used, the effect of preventing the growth of microorganisms is great and the object 14 can be efficiently treated.

In the fourteenth embodiment, the effect of the case where the treatment was performed using the ionized gas 27 containing the negative ions whose temperature was adjusted was shown. However, the metal needle electrode 7 in the ion generation chamber 21 has a positive polarity. The same effect can be obtained by applying positive DC high voltage to generate positive ions and supplying the positive ions to the ion supply chamber 28. However, negative ions are more proliferative of microorganisms than positive ions. The effect of preventing is great.

Example 15. In the fourteenth embodiment, the gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2.
And then ionized in the ion generation chamber 21, and the ionized gas 27 containing the temperature-controlled ions is stored in the ion supply chamber 28 from the ion emission unit 51.
However, as shown in FIG. 20, the temperature of the gas 1 in the ion supply chamber 28 is adjusted by the fan 2 as shown in FIG. The chamber 22 and the ion generation chamber 21 are fed in this order, and the ionized gas 27 containing the temperature-adjusted ions is blown from the ion emission unit 51 to the object 14 stored in the ion supply chamber 28, so that the object 14 is blown. The ionized gas 27 containing the temperature-controlled ions that have been sprayed and whose ion concentration has been attenuated is sent again to the temperature control chamber 22, so that the ionized gas 27 containing the temperature-controlled ions recirculates in the ion supply chamber 28. It may be configured as follows. As a result, the wall surface of the ion supply chamber 28 and the object 1
4, or between the electrodes in the ion generation chamber 21 and the like, the negative ions are extinguished, but an ionized gas 27 containing temperature-controlled ions containing a high concentration of ions is always blown directly from the ion emitting portion 51 to the object 14. Ion supply chamber 2
On the surface of the object 14 stored inside 8, the effect of preventing the growth of microorganisms is obtained, and since the gas inside the ion supply chamber 28 is not exchanged, the temperature and humidity inside the ion supply chamber 28 are not changed. It makes it easier to regulate and reduces the energy required to regulate temperature and humidity. Further, as shown in FIG. 21, the same effect can be obtained by providing the fan 2, the ion generation chamber 21, the ion emission unit 51, etc. in the ion supply chamber 28.

Example 16. 22 shows a first embodiment of the present invention.
6 is a configuration diagram showing a microbial growth prevention device according to No. 6, in which reference numeral 54 is a rotating device for rotating the microbial growth prevention device including the fan 2, the temperature control chamber 22, and the ion generation chamber 21.

Next, the operation will be described. The gas 1 in the ion supply chamber 28 passes through the temperature control chamber 22 and is guided to the ion generation chamber 21 by the fan 2, and the ionized gas 27 containing the temperature-controlled ions is transferred from the ion generation chamber 21 to the ion supply chamber 28. Supplied. Further, the rotating device 54 rotates the ion generating device including the fan 2, the temperature adjusting chamber 22, and the ion generating chamber 21. As a result, the blowing direction of the ionized gas 27 containing the temperature-controlled ions is changed by 360 ° and is supplied to the ion supply chamber 28. As a result, the object 14 placed at a certain position in the ion supply chamber 28 is sprayed with the ionized gas 27 containing ions whose temperature is adjusted intermittently according to the operation of the rotating device 54, and the surface of the object 14 is exposed. It is possible to prevent the reproduction of microorganisms.

Example 17 In the sixteenth embodiment described above, the microbial growth prevention device composed of the fan 2, the temperature control chamber 22, the ion generation chamber 21, etc. is rotated to intermittently control the temperature of the object 14 with the ionized gas 27 containing ions.
However, as shown in FIG. 23, a rotation passage 55 is provided on the downstream side of the ion generation chamber 21, and the rotation passage 55 is provided to prevent the microorganisms from propagating on the surface of the object 14. By rotating the ionized gas 27 containing the ions whose temperature has been adjusted to change the direction, the ionized gas 27 containing the ions whose temperature has been adjusted is intermittently sprayed onto the object 14, and the microorganisms propagate on the surface of the object 14. This may be prevented. At this time, it is preferable that the inner surface of the rotary passage 55 is made of an insulating material to prevent the decrease of ions in the rotary passage 55.

Example 18. FIG. 24 shows the first embodiment of the present invention.
8 is a configuration diagram showing a microbial growth prevention device according to 8, in which 56 is a moving rail installed on the ceiling surface inside the ion supply chamber 28, 57 is a fan 2, a temperature control chamber 22, an ion generation chamber 21 and the like. The moving motor is attached to the constituted microbial growth prevention device and moves on the moving rail 56, and 58 is a controller (control device) that determines the position of the moving motor 56.

Next, the operation will be described. First, the transfer motor 5 attached to the microbial growth prevention device including the fan 2, the temperature control chamber 22, and the ion generation chamber 21.
In response to a command from the controller 58, the 7 moves on the moving rail 56 and moves to a position above the position where the object 14 is placed. Therefore, the gas 1 in the ion supply chamber 28
The fan 2 controls the temperature control chamber 22 and the ion generation chamber 21.
In this order, the ionized gas 27 containing the temperature-controlled ions is blown from the ion generation chamber 21 to the object 14. Therefore, when the ionized gas 27 including the temperature-adjusted ions is blown to the object 14 for a certain time, the controller 58 again issues a command to the moving motor 57, and the moving motor 57 moves to the next position where the object 14 is placed. Move to. By programming the ion treatment sequence in this manner, the ion treatment can be performed in order, and the growth of microorganisms can be efficiently prevented for all the objects 14 stored in the ion supply chamber 28. can do.

Example 19 FIG. 25 is a first embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 9. In the figure, 59 is a position detection apparatus attached in the ion supply chamber 28 and recognizing the position direction in which the object 14 exists.

Next, the operation will be described. First, a position detection device 59, which is mainly composed of a radio wave transmitting unit and a radio wave receiving unit, which is attached to the ion supply chamber 28 and recognizes the direction in which the object 14 is present using radio waves, transmits radio waves from the radio wave transmitting unit. The radio wave receiving unit receives the radio wave reflected by the object 14. The direction in which the object 14 is present is detected by detecting the phase difference between the transmitted radio wave and the received radio wave. Next, when the position signal is sent to the controller 58 as an electric signal, the controller 58 sends an electric signal to the drive motor 53 and moves the guide plate 52 through the drive motor 53.

At this time, the gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2 and the temperature is controlled there, and the temperature-controlled ions are removed from the ion generation chamber 21 as in the first embodiment. The ionized gas 27 containing the gas is guided to the ion emitting unit 51, and the ionized gas 27 containing the temperature-controlled ions is released according to the direction in which the guide plate 52 installed inside the ion emitting unit 51 is directed, and An ionized gas 27 containing the temperature-adjusted ions is sprayed on 14. As a result, the temperature-controlled ionized gas 27 containing high-concentration ions can be blown out in the direction in which the object 14 exists, so that the temperature-controlled ionized gas 27 containing high-concentration ions allows the object to flow. 14 It is possible to effectively prevent the growth of microorganisms on the surface or the like.

In the above embodiment, the position detecting device 59 for recognizing the direction in which the object 14 exists has been shown to use radio waves, but the object 14 exists using microwaves or laser light instead of radio waves. The same effect can be obtained by detecting the direction. Further, a similar effect can be obtained by converting the image into an electric signal and detecting the direction in which the object 14 is present by a method in which a CCD video camera and a secondary image processing device are combined.

In the above embodiment, the position direction in which the object 14 is present is detected and the ionized gas 27 containing the temperature-adjusted ions is blown out in that direction.
At the same time, the distance between the object 14 and the ion emitting portion 51 is obtained, and the ionized gas 27 containing the temperature-adjusted ions is detected by
When the negative ion concentration in the ionized gas 27 containing the temperature-controlled ions is reached, the negative polarity applied to the plurality of metal needle electrodes 7 provided in the ion generation chamber 21 is predicted accordingly. The value of the DC high voltage or the pulse frequency of the negative DC pulse high voltage is changed, or the rotation speed of the fan 2 is changed to change the velocity of the gas passing between both electrodes in the ion generation chamber 21. Thus, the negative ion concentration in the ionized gas 27 containing the temperature-controlled ions generated in the ion generation chamber 21 is set, and the ionized gas 2 containing the temperature-controlled ions when reaching the surface of the object 14 2
By keeping the negative ion concentration in 7 constant, microorganisms existing on the surface of the object 14 can be uniformly prevented.

Further, in the above embodiment, the ion supply chamber 28
The external gas 1 is supplied from the fan 2 to the temperature control chamber 22 and the ion generation chamber 21 in this order, and the ionized gas 27 containing the temperature-controlled ions is blown from the ion generation chamber 21 to the object 14. , Ion supply room 2
The gas 1 in 8 is supplied from the fan 2 to the temperature control chamber 22 and the ion generation chamber 21 in this order, and the ionized gas 27 including the temperature-controlled ions is supplied from the ion generation chamber 21 to the object 14
You may spray on.

Example 20. In the eighteenth embodiment, the ionized gas 27 containing the temperature-controlled ions is blown to the object 14 for a certain time, and according to the program,
Although the ion treatment is shown in order, as shown in FIG. 26, the position detecting device 59 detects the position where the object 14 exists, and an electric signal is sent from the controller 58 to the moving motor 57. The moving motor 57 may move above the position where the object 14 is present, and the ionized gas 27 including the temperature-adjusted ions may be blown to the object. As a result, the ionized gas 27 containing the ions whose temperature is adjusted can be efficiently sprayed to the object 14 stored in the ion supply chamber 28, and the growth of microorganisms on the surface of the object 14 can be prevented.

Example 21. Examples 14, 15 and 1 above
In FIG. 9, the guide plate 52 whose surface portion is made of an insulating material is shown. However, as shown in FIG. 27, the guide plate 52 itself is made of a conductive material and the guide plate 52 is used. The insulator 12 made of an insulating material such as acrylic resin, polyethylene, polyvinyl chloride, glass, or quartz glass may be inserted between the portion supporting the electrode and the wall surface of the ion emitting portion 51. The same effect as 15 and 19 can be obtained.

Example 22. FIG. 28 shows the second embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 2. In the figure, 60 is a metal ground wire which is the same potential as the wall surface of a refrigerator, 61 is the metal ground wire 60 and the contact of a grounding destination is opened and closed (O.
It is a switch box having a switch that is N-OFF) and grounded or electrically floated.

The gas 1 outside the ion supply chamber 28 is supplied to the temperature control chamber 22 by the fan 2 and the temperature thereof is controlled, and the ionized gas containing the temperature controlled ions is supplied from the ion generation chamber 21 as in the first embodiment. 27 is the ion supply chamber 2
Emitted to 8. In the normal case, since the air is supplied, the temperature-controlled ionized air is supplied. The negative ions supplied into the ion supply chamber 28 are initially
Although it disappears by colliding with the inner wall surface or the object 14, the switch in the switch box 61 causes the metal ground wire 60 to disappear.
Is not grounded, a negative charge (static electricity) is accumulated on the wall surface or the like in the ion supply chamber 28. As described above, the ions disappear at first, but when the electric charge is accumulated on the wall surface with the passage of time, the repulsive force acts on the ions and they do not collide with the wall surface. You will be able to maintain in space.

Next, when the ion treatment of the object 14 is completed, the metal ground wire 60 is grounded by the switch in the switch box 61, and the negative charge (electrostatic charge) accumulated on the wall surface or the like in the ion supply chamber 28. Flows to the ground. That is, it is preferable to perform the ion treatment on the object 14, then remove the static electricity accumulated on the wall surface, and then take out the object 14, so that electrostatic damage or the like occurs to humans after the ion treatment. Can be prevented.

In the above-mentioned embodiment, a timer or the like is used to open and close the contacts in the switch box 61 at the timing of the end of the ion treatment. Then, the contacts in the switch box 61 may be opened and closed.

In the above embodiment, the ionized gas 27 containing negative ions was supplied into the ion supply chamber 28, and the negative charge was accumulated on the wall surface in the ion supply chamber 28. Even when the ionized gas 27 containing ions containing positive ions is supplied into the ion supply chamber 28 and the positive charge is accumulated, the switch box 6
By closing the contact in 1, the positive charge can be released to the ground.

In the above-mentioned embodiment, the one in which the accumulated static electricity is released to the ground is shown. However, when the wall surface is charged by negative ions, for example, a positive charge is applied by giving a charge opposite to the charged charge. The same effect can be obtained by electrically neutralizing.

Example 23. FIG. 29 shows the second embodiment of the present invention.
3 is a block diagram showing a microbial growth prevention apparatus according to 3, in which 62 is a refrigerating vehicle, 63 is a refrigerating box attached to the refrigerating vehicle 62, 64 is a metal chain having the same potential as the wall surface of the refrigerating box 63, and 65. Is a rotary motor for moving the metal chain 64 in and out.

Next, the operation will be described. In the refrigerator 63 attached to the refrigerating vehicle 62, the gas 1 inside the refrigerator 63 is
Is supplied to the temperature control chamber 22 by the fan 2, where it is cooled to about 0 to 10 ° C. by the heat exchanger 24, and the ionized gas 2 containing the cooled ions from the ion generation chamber 21 is supplied.
7 is discharged into the cooling chamber 63. The ionized gas 27 containing the cooled ions is sprayed onto the surface of the object 14 stored in the refrigerating chamber 63 to prevent the microorganisms existing on the surface of the object 14 from propagating. However,
The negative ions supplied to the cooler 63 collide with the wall surface and the like, and charge the wall surface, and the cooler 63 itself is charged.

As described above, when the cooling box 63 is charged, electrostatic damage occurs when the object 14 is taken out, which poses a safety problem. In order to eliminate such problems,
When taking out the object 14, the rotary motor 65 moves,
Take out the metal chain 64, ground it to the ground, and cool down 6
3 Make sure that the static electricity accumulated on the inner wall surface is released to the ground. As a result, it is possible to prevent static electricity damage to humans due to static electricity accumulated in the cooling box 63.

Example 24. FIG. 30 shows a second embodiment of the present invention.
4 is a configuration diagram showing a microbial growth prevention device according to No. 4, in which reference numeral 66 is an AC voltage generator for applying an AC voltage to the metal plate electrode 37.

Next, the operation will be described. When the object 14 is placed on the turntable 47 installed in the ion supply chamber 28, the gas 1 in the ion supply chamber 28 is sent to the ion generation chamber 21 by the fan 2 and ionized without ozone from the ion generation chamber 21. The discharged gas 13 is released into the space from one direction. Next, when the ionized gas 13 containing no ozone is started to be released, the turntable 47 rotates, and at the same time, an AC voltage is applied from the AC voltage generator 66 to the flat metal plate electrode 37 installed on the ceiling surface. When an AC voltage is applied to the metal plate electrode 37,
The object 14 is heated from the inside, and the ionized gas 13 containing no ozone is uniformly applied to the heated object 14. As a result, a synergistic effect of temperature and ions appears, the ability to prevent the growth of microorganisms adhering to the surface of the object 14 can be improved, and the object 14 can be uniformly heated. Further, when the object 14 is frozen, it is possible to prevent the growth of microorganisms adhering to the surface of the object 14 while thawing the object 14 evenly.

Example 25. In Example 24, the flat metal plate electrode 37 is provided on the ceiling surface of the ion supply chamber 28, and an AC voltage is applied to the flat metal plate electrode 37 to heat the object 14 and ionize the object 14 without ozone. Although the gas 13 which is sprayed to prevent the growth of microorganisms on the surface of the object 14 is shown, as shown in FIG. 31, the ionized gas 13 containing no ozone is used.
Is sprayed onto the object 14, and the floor surface on which the object 14 is placed is simultaneously cooled so that the object 14 is directly cooled. Due to the synergistic effect of temperature and ions, the microorganisms attached to the surface of the object 14 are The ability to prevent proliferation can be improved.

Example 26. 32 shows a second embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 6, In the figure, 67 is a gas supply apparatus, such as a compressor which supplies air or oxygen, 68 is a water tank which stores the liquid in which microorganisms grow, 69 does not contain ozone. A diffuser (gas-liquid mixer) for making the ionized gas 13 bubble and supplying it into the water of the water reservoir 68, 70 is a bubble, 71 is water to be treated,
72 is a temperature controller for adjusting the temperature of the water 71 to be treated, 73
Is the temperature-controlled water, 74, 75 and 76 are solenoid valves, and 77 is the ionized gas 13 containing no ozone.
Treated water treated by the above, 78 is a level sensor for measuring the water level, 79 is an ionized gas containing excess ions, 80 is a pair of mesh metal nets for removing excess ions, and 81 is for removing excess ions. It is a processed gas.

Next, the operation will be described. First, when the electromagnetic valve 74 is opened, the temperature controller 72 is connected to the treated water 71.
Is sent and the temperature of the treated water 71 is adjusted. afterwards,
The treated water 73 whose temperature has been adjusted is sent to the water reservoir 68,
The treated water 73 whose temperature has been adjusted is stored in the water reservoir 68. Next, when the gas supply device 67 is operated and the electromagnetic valve 75 is opened at the same time, the ionized gas 13 containing no ozone is generated from the ion generation chamber 21.

The ionized gas 13 containing no ozone is sent to the diffuser 69 made of ceramic or the like, and becomes fine bubbles 70 to be diffused in the water reservoir 68.
As a result, the temperature-controlled water 73 in the water reservoir 68 comes into contact with the minute bubbles 70 containing ions, and the growth of microorganisms such as bacteria existing in the water is prevented. The water in the water reservoir 68 is used as drinking water or treated water 77 according to other purposes when the solenoid valve 76 is opened. Further, when the treated water 77 in the water reservoir 68 is used and the water level drops, a signal is output from the level sensor 78, the electromagnetic valve 74 is opened, and the treated water 71 becomes the temperature controller 72.
And the temperature of the treated water 71 is adjusted to the water reservoir 68.
Will be sent to again. On the other hand, the surplus ionized gas 79 is guided to a pair of grounded mesh-shaped metal nets 80, and after the surplus ions are removed, it is discharged as a processing gas 81.

When the treated water 77 in the water reservoir 68 is used intermittently, the gas supply device 67 is intermittently operated accordingly. On the other hand, when the treated water 77 is continuously used, the treated water 71 is continuously supplied, so that the gas supply device 67 is continuously operated. At this time, the ion concentration in the ionized gas 13 containing no ozone is preferably as high as possible. The flow rate of the ionized gas 13 containing no ozone supplied to the water reservoir 68 is preferably injected so that the residence time in the water reservoir 68 is several minutes to several tens of minutes.

In the twenty-sixth embodiment, the gas supply device 6
Although a compressor was used as 7, an ion generation efficiency can be increased by supplying oxygen gas using an oxygen gas cylinder or liquefied oxygen.

Example 27. In Example 26, only the ionized gas 13 containing no ozone was diffuser 6
As shown in FIG. 33, an ozone generator 39 for generating ozone is provided, and an insulating pipe 41 is used to supply an ionized gas 1 containing no ozone.
3 and ozone are mixed, and the mixed ionized gas 42 is mixed.
May be supplied to the diffuser 69. In this case, a synergistic effect of ions and ozone is obtained, and the growth of microorganisms can be suppressed more reliably.

Example 28. FIG. 34 shows a second embodiment of the present invention.
FIG. 8 is a configuration diagram showing a microbial growth prevention apparatus according to No. 8, in which 82 is an ionized gas 1 containing no ozone.
A nozzle for ejecting the treated water 77 treated in No. 3 into fine particles and ejecting it is a liquid pump 83 for feeding the treated water 77 treated with the ionized gas 13 containing no ozone to the nozzle 82.

Next, the operation will be described. First, when the electromagnetic valve 74 is opened, the temperature controller 72 is connected to the treated water 71.
Is sent and the water to be treated 71 is heated. At this time, it is desirable to set the temperature of the water to be treated 71 according to the object to be washed. Then, the treated water 7 heated in the water reservoir 68
3 is sent, and the heated water 73 is stored in the water reservoir 68. Next, when the gas supply device 67 is operated and the electromagnetic valve 75 is opened at the same time, the ionized gas 13 containing no ozone is generated from the ion generation chamber 21.

The ionized gas 13 containing no ozone is sent to the diffuser 69 made of ceramic or the like, and becomes fine bubbles 70 to be diffused in the liquid in the water reservoir 68. As a result, the heated water 73 to be treated in the water reservoir 68 comes into contact with the minute bubbles 70 containing ions, and the growth of microorganisms such as bacteria existing in the water is prevented. When the electromagnetic valve 76 is opened, the water in the water reservoir 68 is sent to the liquid pump 83, and the treated water 77 that has been made into fine particles is ejected from the nozzle 82, and is used as water for cleaning the object 14. In addition, the treated water 77 in the water reservoir 68 is used,
When the water level drops, a signal is output from the level sensor 78, the electromagnetic valve 74 is opened, the treated water 71 is sent to the temperature controller 72, the treated water 71 is heated, and is sent to the water reservoir 68 again. . On the other hand, the surplus ionized gas 79 is guided to a pair of grounded mesh-shaped metal nets 80, and after the surplus ions are removed, it is discharged as a processing gas 81. This makes it possible to prevent the growth of microorganisms adhering to the surface of the object 14 while washing the object 14 with the treated water 77 treated with the ionized gas 13 containing no ozone.

Example 29. FIG. 35 shows a second embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 9. In the figure, 84 is the ionized gas 1 which does not contain ozone.
3 is an ejector (gas-liquid mixer) for dissolving and mixing 3 in the heated treated water 73, and 85 is a compression pump for feeding the heated water 74 to the ejector 84.

Next, the operation will be described. First, when the electromagnetic valve 74 is opened, the temperature controller 72 is connected to the treated water 71.
Is sent and the water to be treated 71 is heated. Then, the heated water 73 is sent to the compression pump 85. next,
By operating the compression pump 85 and supplying the heated water to be treated 73 to the ejector 84, the ionized gas 13 containing no ozone generated from the ion generation chamber 21 is generated.
Become fine bubbles in the heated water 73 to be treated,
It is dissolved and mixed in the cooling water. The heated water to be treated in which the ionized gas 13 containing no ozone is dissolved is sprayed from the nozzle 82 into treated water 77, which is used as water for cleaning the object 14. As a result, the object 14 is converted into an ionized gas 1 containing no ozone.
It is possible to prevent the growth of microorganisms adhering to the surface of the object 14 while washing with the treated water 77 treated in 3.

Example 30. 36 shows a third embodiment of the present invention.
It is a block diagram which shows the microbial growth prevention apparatus by 0. In the figure, 86 is a mesh metal mesh attached to the upper part of the water reservoir 68, and 87 is a metal ground electrode attached to the lower part of the water reservoir 68.

Next, the operation will be described. First, when the electromagnetic valve 74 is opened, the temperature controller 72 is connected to the treated water 71.
Is sent and the temperature of the treated water 71 is adjusted. afterwards,
The treated water 73 whose temperature has been adjusted is sent to the water reservoir 68,
The treated water 73 whose temperature has been adjusted is stored in the water reservoir 68. Next, when the gas supply device 67 is operated and the electromagnetic valve 75 is opened at the same time, the ionized gas 13 containing no ozone is generated from the ion generation chamber 21. This ozone-free ionized gas 13 is sent to a diffuser 69 made of ceramic or the like, and fine bubbles 70
And diffused into the water reservoir 68.

At this time, when a negative DC voltage is applied from the DC voltage generator 38 to the mesh-shaped metal net 86 attached to the upper part of the water reservoir 68, the mesh-shaped metal net 86 and the metal ground electrode 87 are separated from each other. An electric field is generated at. Due to the action of this electric field, fine bubbles 70 containing negative ions supplied into the water 73 to be treated whose temperature is adjusted in the water reservoir 68.
Receives the downward force and the temperature of the treated water 73 is adjusted.
It becomes difficult to escape from the inside, and the residence time in the temperature-controlled water 73 to be treated in the water reservoir 68 can be lengthened. As a result, a sufficient amount of negative ions can be dissolved in the temperature-controlled water 73 to be treated, and the growth of microorganisms such as bacteria existing in the water to be treated 71 can be sufficiently prevented. Further, when the treated water 77 in the water reservoir 68 is used and the water level is lowered, a signal is output from the level sensor 78, the electromagnetic valve 74 is opened, the treated water 71 is sent to the temperature controller 72, and the treated water 71 is treated. The temperature of the treated water 71 is adjusted and sent to the water reservoir 68 again. On the other hand, the negative ions in the ionized gas 13 that does not contain ozone are dissolved in the water 73 to be sufficiently temperature-controlled by the mesh-shaped metal net 86 attached to the water reservoir 68 and the metal ground electrode 87. , So that the processing gas 8 is removed.
1 is discharged to the space outside the water reservoir 68.

Here, when the treated water 77 of the water reservoir 68 is used intermittently, the gas supply device 67 is intermittently operated accordingly, and the temperature-controlled treated water 73 in the water reservoir 68 is used. A DC voltage is applied to the mesh metal mesh 86 from the DC voltage generator 38 only when the ionized gas 13 containing no ozone is supplied to the mesh metal mesh 86.

When the temperature-controlled water 73 in the water reservoir 68 is treated with negative ions, it is preferable that the ion concentration in the ionized gas 13 not containing ozone be as high as possible. Since there is a limit to increasing the ion concentration in the non-ionized gas 13, it is preferable to increase the flow rate of the ozone-free ionized gas 13 sent to the temperature-controlled water 73 in the water reservoir 68. . However, when the flow rate of the ionized gas 13 containing no ozone is increased, the residence time in the temperature-controlled water 73 in the water reservoir 68 becomes shorter, and therefore the DC voltage generator is applied to the mesh metal mesh 86. It is desirable to increase the value of the DC voltage applied from 38 to increase the electric field and lengthen the residence time.

[0164]

As described above, according to the first aspect of the present invention, the temperature of the ionized gas containing ions is set in a temperature range that is lower or higher than the optimum temperature range where the growth of microorganisms is active. Since it is regulated and supplied to the object in which the microorganisms propagate or the space storing the object, the synergistic effect of temperature and ions can increase the ability to prevent the proliferation of microorganisms. is there.

According to the second aspect of the invention, the predetermined temperature is set to 10
By setting the temperature to be not lower than 0 ° C, there is an effect that the ability to prevent the growth of microorganisms can be increased by the synergistic effect of temperature and ions.

According to the third aspect of the invention, since the temperature adjusting means is installed, it is possible to generate ions in the gas whose temperature is adjusted, and the synergistic effect of the temperature and the ions allows the microorganisms to be generated. This has the effect of increasing the ability to prevent reproduction.

According to the invention of claim 4, since the temperature adjusting means is constituted by either or both of the cooler and the heater, it is possible to generate ions in the cooled gas or the heated gas. By the synergistic effect of temperature and ions, there is an effect that the ability to prevent the growth of microorganisms can be increased.

According to the invention of claim 5, since the temperature adjusting means is arranged upstream of the ion generating chamber,
The temperature can be adjusted without reducing the ions generated in the ion generating chamber, and the synergistic effect of the temperature and the ions can increase the ability to prevent the growth of microorganisms.

According to the sixth aspect of the invention, the gas containing the ions, the temperature of which is adjusted by the temperature adjusting means, is supplied to the space for storing the object in which the microorganisms propagate. The ionized gas containing the temperature-controlled ions is supplied, and it is possible to sufficiently prevent the growth of microorganisms on the surface of the object.

According to the invention of claim 7, there is provided an ion supply chamber which has a space for storing an object in which microorganisms propagate and which supplies an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means to the space. Since the object is provided with the ionized gas containing the temperature-controlled ions, it is possible to sufficiently prevent the growth of microorganisms on the surface of the object.

According to the eighth aspect of the present invention, a pair of metal electrodes and a DC power supply are provided for moving only the ions in the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means to the surface of the object on which the microorganisms grow. With this configuration, it is possible to efficiently supply only ions to the object surface to the object surface, and it is possible to effectively prevent the growth of microorganisms on the object surface.

According to the invention of claim 9, an ozone generator is provided, and ozone is mixed with a gas containing ions whose temperature is adjusted by the temperature adjusting means to obtain a temperature-adjusted ionized gas containing ozone and ions. Is configured to be supplied to the ion supply chamber, so due to the synergistic effect of ozone and ions,
This has the effect of increasing the ability to prevent the growth of microorganisms on the surface of an object.

According to the tenth aspect of the present invention, there is a space for storing an object in which microorganisms propagate, and an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means is stored in the space. Since it is configured to have an ion supply unit that blows directly onto the object, an ionized gas containing temperature-controlled ions containing a high concentration of ions is directly supplied to the object surface, and microorganisms propagate on the object surface. There is an effect that it can be efficiently prevented.

According to the eleventh aspect of the present invention, the ion supplying section releases the ionized gas containing the ions whose temperature is adjusted by the temperature adjusting means, and the ion-adjusted temperature of the object in which the microorganisms grow. Since it was composed of a carrier that carries the ionized gas containing
An ionized gas containing temperature-controlled ions containing a high concentration of ions can be directly supplied to the object surface, and a large amount of object surface can be efficiently supplied in a short time.
It has the effect of preventing the reproduction of microorganisms.

According to the twelfth aspect of the present invention, the ion supply section has an ion supply chamber having a space for storing an object in which microorganisms propagate, and a direction in which an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means is blown out. The ionized gas containing the temperature-controlled ions containing a high concentration of ions to the surface of the object because it is composed of an ion emitting part that changes and emits and directly blows on the object stored in the space. Can be intermittently supplied, and there is an effect that microorganisms can be prevented from propagating on the object surface over a wide range in the ion supply chamber.

According to the thirteenth aspect of the present invention, a blower for taking in gas, a ventilation path through which the gas taken in by the blower passes, and a ventilation path are installed in the ventilation path to ionize electrons to the gas. A moving device for moving the microbial growth preventing device, which is composed of an ion generating chamber for ionizing the gas by means of the above, and a temperature adjusting means for adjusting the temperature of the ionized gas containing ions by the ion generating chamber, inside the ion supply chamber. Since it is configured as described above, it is possible to intermittently supply the ionized gas containing the temperature-controlled ions containing a high concentration of ions to the object surface, and the microorganisms can be efficiently distributed on the object surface over a wide range in the ion supply chamber. It has the effect of preventing breeding.

According to the fourteenth aspect of the present invention, the position detecting device for recognizing the position of the object in which the microorganisms propagate in the ion supply chamber, and the object exist in the blowing direction of the ionized gas containing the temperature-controlled ions. Since it is composed of a control device for instructing to change the direction to the direction, it is possible to efficiently blow an ionized gas containing ions whose temperature is adjusted to the object stored in the ion supply chamber, and the microorganisms on the surface of the object. It has the effect of effectively preventing breeding.

According to the fifteenth aspect of the invention, since the earth wire connected to the surface of the ion supply chamber and the switch for opening and closing the contact point between the earth wire and the ground destination are provided, during the ion treatment. , It has the effect of preventing the ions from disappearing more than necessary, and can effectively prevent the growth of microorganisms on the surface of the object, and it is also possible to remove the charge accumulated on the wall surface etc. in the ion supply chamber after the ion treatment. , There is an effect that it is possible to prevent humans from being disturbed by static electricity.

According to the sixteenth aspect of the present invention, a pair of metal electrodes for heating an object in which microorganisms propagate from the inside and a DC power source are provided in the ion supply section, and an ionized gas containing ions is directly supplied to the object. Since it is configured to be sprayed, the synergistic effect of temperature and ions increases the ability to prevent the growth of microorganisms on the surface of the object by directly supplying the ionized gas containing a high concentration of ions to the surface of the object. There is an effect that can be made.

According to the seventeenth aspect of the invention, since the ionized gas containing the ions is bubbled by the ion generating chamber and is supplied to the liquid whose temperature in the water reservoir is adjusted, This has the effect of suppressing the growth of microorganisms.

According to the eighteenth aspect of the present invention, a pair of metal nets and a DC power source are provided to prevent the ions in the ionized gas containing the ions from being diffused from the liquid by the ion generating chamber. It is possible to efficiently dissolve the ions in the liquid, and it is possible to sufficiently suppress the growth of microorganisms in the liquid.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a table showing experimental results of an experiment demonstrating that bacterial growth is suppressed by an ionized gas containing temperature-controlled ions.

FIG. 3 is a table showing the relationship between temperature and the growth rate of microorganisms.

FIG. 4 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 1 of the present invention.

FIG. 5 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 1 of the present invention.

[Fig. 6] Fig. 6 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 2 of the present invention.

FIG. 7 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 3 of the present invention.

[Fig. 8] Fig. 8 is a configuration diagram showing a microbial breeding prevention device according to a third embodiment of the present invention.

FIG. 9 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 4 of the present invention.

FIG. 10 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 5 of the present invention.

FIG. 11 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 6 of the present invention.

FIG. 12 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 7 of the present invention.

FIG. 13 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 8 of the present invention.

FIG. 14 is a configuration diagram showing a microbial growth prevention apparatus according to Example 9 of the present invention.

FIG. 15 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 10 of the present invention.

FIG. 16 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 11 of the present invention.

FIG. 17 is a configuration diagram showing a microbial breeding prevention device according to a twelfth embodiment of the present invention.

FIG. 18 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 13 of the present invention.

FIG. 19 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 14 of the present invention.

FIG. 20 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 15 of the present invention.

FIG. 21 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 15 of the present invention.

FIG. 22 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 16 of the present invention.

FIG. 23 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 17 of the present invention.

FIG. 24 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 18 of the present invention.

FIG. 25 is a configuration diagram showing a microbial growth prevention apparatus according to Example 19 of the present invention.

FIG. 26 is a configuration diagram showing a microbial growth prevention apparatus according to Example 20 of the present invention.

FIG. 27 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 21 of the present invention.

FIG. 28 is a configuration diagram showing a microbial growth prevention apparatus according to Example 22 of the present invention.

FIG. 29 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 23 of the present invention.

FIG. 30 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 24 of the present invention.

FIG. 31 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 25 of the present invention.

FIG. 32 is a configuration diagram showing a microbial growth prevention apparatus according to Example 26 of the present invention.

FIG. 33 is a configuration diagram showing a microbial growth prevention apparatus according to Example 27 of the present invention.

FIG. 34 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 28 of the present invention.

FIG. 35 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 29 of the present invention.

FIG. 36 is a configuration diagram showing a microbial growth prevention apparatus according to Embodiment 30 of the present invention.

FIG. 37 is a configuration diagram showing a conventional microbial growth prevention device.

[Explanation of symbols]

1 gas, 2 fan (blower), 3 ventilation path, 14
Object, 21 Ion generation chamber, 22 Temperature control chamber (temperature control means), 28 Ion supply chamber, 36 Metal plate ground electrode (metal plate), 37 Metal plate electrode (metal plate), 3
9 ozone generator, 51 ion emission part, 58 controller (control device), 60 metal ground wire (ground wire), 61 switch box (switch), 68 water reservoir, 86 mesh wire mesh (metal mesh).

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location C02F 1/50 550 DH L 560 F 1/70 Z (72) Inventor Koji Ota Tsukaguchi Honcho, Amagasaki 8-1-1, Mitsubishi Electric Corporation Central Research Laboratory

Claims (18)

[Claims] 1. A low temperature region equal to or lower than a lower limit temperature of a temperature region in which the growth of microorganisms is most active, and a predetermined temperature lower than an upper limit temperature of a temperature region in which the growth of microorganisms is most active. The temperature of the ionized gas containing ions is adjusted to the temperature of one of the high temperature regions equal to or higher than the raised temperature, and the object in which the microorganisms propagate and / or the space for storing the object are A method for preventing microbial growth, which comprises supplying an ionized gas containing ions after temperature control. 2. The method for preventing microbial growth according to claim 1, wherein the predetermined temperature is 10 ° C. or higher. 3. A blower for taking in gas, a ventilation path through which the gas taken in by the blower passes, and an ion installed in the ventilation path to ionize the gas by ionizing electrons to the gas. A microbial growth prevention apparatus comprising: a generation chamber and a temperature control means for controlling the temperature of a gas to be ionized in the ion generation chamber. 4. The microbial growth prevention apparatus according to claim 3, wherein the temperature adjusting means is configured by either or both of a heater and a cooler. 5. The microbial growth prevention apparatus according to claim 3, wherein the temperature adjusting means is installed upstream of the ion generating chamber. 6. A space for storing an object in which microorganisms propagate, and an ion supply chamber for supplying an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means to the space. The microbial growth prevention apparatus according to any one of claims 3 to 5. 7. A blower for taking in gas, a vent passage through which the gas taken in by the blower passes, a temperature adjusting means installed in the vent passage for adjusting the temperature of the gas, and the temperature adjusting means. An ion generation chamber that ionizes the temperature-controlled gas by ionizing electrons to the gas, a space for storing an object in which microorganisms propagate, and an ionized gas containing ions whose temperature is controlled by the temperature control means. And an ion supply chamber for supplying the space to the space. 8. A metal flat plate is provided on a ceiling surface and a floor surface in the ion supply chamber, and a DC power source for applying a DC voltage is provided to the metal flat plate arranged on the ceiling surface, so that the metal flat plate is arranged on the floor surface. The device for preventing microbial growth according to claim 7, wherein the device is grounded. 9. An ozone generator that generates ozone, and a gas mixing device that mixes ozone generated by the ozone generator with a gas that has been ionized in the ion generation chamber and whose temperature has been adjusted by the temperature adjusting means. The microbial growth prevention apparatus according to any one of claims 3 to 8, which is provided. 10. A blower for taking in gas, a vent passage through which the gas taken in by the blower passes, temperature adjusting means installed in the vent passage for adjusting the temperature of the gas, and the temperature adjusting means. An ion generating chamber that ionizes the temperature-controlled gas by ionizing electrons, and an ionized gas containing ions whose temperature is controlled by the temperature control means are directly attached to an object on which microorganisms propagate. An apparatus for preventing microbial growth, comprising an ion supply unit for supplying the ion to the target. 11. The ion supply unit releases an ionized gas containing temperature-adjusted ions, which is introduced from the ion generation chamber, and an ionized gas containing temperature-adjusted ions. 11. The microbial growth prevention apparatus according to claim 10, wherein the microbial growth prevention apparatus comprises a carrying device for carrying an object in which microorganisms propagate to the designated position. 12. An ion supply chamber in which the ion supply unit has a space for storing an object in which microorganisms propagate, and an ionized gas containing ions whose temperature is adjusted by the temperature adjusting means, on the downstream side of the ion generation chamber. The direction of the balloon
11. The microbial growth prevention apparatus according to claim 10, comprising an ion emitting portion that changes and emits. 13. A blower for taking in gas, a vent passage through which the gas taken in by the blower passes, temperature adjusting means installed in the vent passage for adjusting the temperature of the gas, and the temperature adjusting means. An ion generation chamber that ionizes electrons into a temperature-controlled gas by ionizing the gas, an ion supply chamber having a space for storing an object in which microorganisms propagate, and an ionized gas containing temperature-controlled ions And a moving device for moving the microbial growth preventing device to a position where the object can be sprayed onto the object. 14. A position detecting device for recognizing the position of an object in which microorganisms propagate in the ion supply chamber, and, in response to an instruction from the position detecting device, blows out a gas containing ions to a direction in which the object exists. 14. The microbial growth prevention apparatus according to claim 12 or 13, further comprising a control device for instructing a change. 15. A ground wire for removing static electricity accumulated on the inner surface of the ion supply chamber, and a switch for opening and closing a contact between the ground wire and a ground destination are provided. Or the microbial growth prevention apparatus according to any one of claims 12 to 14. 16. An air blower for taking in gas, a vent passage through which the gas taken in by the blower passes, and an ion installed in the vent passage to ionize the gas by ionizing electrons to the gas. With the generation chamber, an ion supply unit that supplies the gas ionized by the ion generation chamber so as to directly spray the object on which the microorganisms propagate, and a metal flat plate on the ceiling surface and the floor surface in the ion supply unit. An apparatus for preventing microbial growth, characterized in that an AC power supply for applying an AC voltage is provided on a metal flat plate arranged on the ceiling surface, and the metal flat plate arranged on the floor surface is grounded. 17. A water reservoir for storing a liquid in which microorganisms propagate, temperature control means for controlling the temperature of the liquid in the water reservoir, and an ionized gas containing ions generated by the ion generating chamber, which is bubbled into the water. A device for preventing microbial growth, comprising: a gas-liquid mixer for supplying the temperature-controlled liquid in a water reservoir. 18. A water reservoir for storing a liquid in which microorganisms propagate, temperature control means for controlling the temperature of the liquid in the water reservoir, and an ionized gas containing ions generated by the ion generating chamber, which is bubbled into the water. A gas-liquid mixer for supplying the temperature-controlled liquid in the water reservoir, a metal net at the top and bottom of the water reservoir, and a DC power source for applying a DC voltage to the metal net at the top. A microbial growth prevention device characterized in that a metal net arranged on the floor is grounded.