JPH07301482A - Freezer/air conditioner - Google Patents

Abstract

PURPOSE:To obtain a cooling unit capable of sufficiently preventing the propagation of microorganisms by a negative ion. CONSTITUTION:A cooling unit comprises: a microorganism propagation- preventing unit A provided with an air passage 22b, an ionization chamber 23 whish is set in the air passage and in which gas in air is ionized by ionizing electrons, an ozone decomposition chamber 28 which is set in the aforementioned air passage in an electrically insulated state, decomposes ozone contained in the gas ionized by the aforementioned ionization chamber and removes ozone from the gas; a cooler 65 which allows a refrigerant to exchange heat with air to be heat-exchanged; and a blower 67 for feeding heat-exchanged air. Accordingly, an air flow passage in the microorganism propagation-preventing unit A is disposed so as to be located in a position of an outlet port of the blower 67 in the cooling unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to the prevention of microbial reproduction,
The present invention relates to a refrigeration / air-conditioning device having functions such as deodorization.

[0002]

2. Description of the Related Art FIG. 25 is a cross-sectional view of a conventional microbial growth preventive device described in, for example, a catalog of Tech Co., where 1 is air or oxygen, 50 is an electrode plate coated with silicon, and 3 is the above electrode plate. High voltage (about 12,0
00V) is a high voltage power supply.

Next, the operation will be described. A high voltage is applied to the silicon-coated electrode plate 50 to cause discharge in the electrode plate 50 space. At that time, oxygen 1 (in the air) is changed (30 ₂ → 20 ₃ ) by the energy of countless discharges (corona discharges) generated in the discharge space, and ozone is generated. As shown in FIG. 26, by supplying a gas containing ozone to the food stored in the refrigerator, the growth of microorganisms generated in the food is prevented.
In the figure, 7 is a refrigerator, 8 is food stored in the refrigerator 7, 9 is a cooler of the refrigerator 7, 10 is gas in the refrigerator 7, 11 is a fan for taking in the gas 10, and 12 is ozone by discharge. An ozone generator 13 is an ozone sterilization / deodorization chamber for sterilizing and deodorizing bacteria and malodorous components such as bacteria and mold contained in the gas 10 with ozone, and 15 is a sterilized and deodorized clean gas.

Next, the operation will be described. The refrigerator 9 is cooled by the cooler 9 provided in the refrigerator 7, and the food 8 is preserved. On the other hand, the mold captured by the fan 11,
The ozone generator 12 injects ozone into the gas 10 containing bacteria or malodorous components such that the ozone concentration in the gas 10 is several ppm to several tens of ppm. The gas 10 thus injected with ozone is ozone sterilization / deodorization chamber 1
3 to sterilize or deodorize the mold, bacteria, or malodorous components contained in the gas 10.

However, since the gas 10 in the ozone sterilization / deodorization chamber 13 contains several ppm to several tens of ppm of ozone, it is harmful to the human body if it is discharged as it is, and the heat exchanger, the fan 11, etc. May corrode the equipment (specifically, the ozone concentration in the refrigerator 7 should be 0.1% or less).
If it is increased to more than ppm, discoloration or deterioration may occur depending on the type of food, and equipment such as the heat exchanger 9 of the cooler 9 and the fan 11 may be corroded).

[0006]

When using ozone to prevent the growth of microorganisms, the ozone concentration of the gas 10 must be suppressed to 0.1 ppm or less in consideration of adverse effects on the human body. Then, there was a problem that the reproduction of microorganisms could not be sufficiently prevented.

The present invention has been made in order to solve the above problems. A first object of the present invention is to prevent the growth of microorganisms by supplying ions that do not adversely affect the human body, or to prevent air conditioning in a conditioned space. This is to obtain a refrigeration / air-conditioning system with high purification capacity. A second object is to obtain a refrigerating / air-conditioning apparatus capable of controlling the amount of generated ions, in order to prevent the above-mentioned microorganisms from breeding due to ions or to more effectively purify the air-conditioned space. It is a thing.

A third object is that when the absolute humidity of the space for storing microorganism-propagating objects such as food or the air-conditioned space changes, the amount of ions in the space also changes, but even if the absolute humidity changes. (EN) A refrigerating / air-conditioning apparatus capable of controlling the amount of ions in the space to a predetermined value and maintaining a good state of preventing the growth of microorganisms and cleaning the air-conditioned space.

A third object is to control the amount of ozone generated within a predetermined range to suppress the disadvantages caused by ozone, and to prevent the growth of microorganisms and purify the air-conditioned space by the synergistic effect of ozone and ions. A further improved refrigeration / air conditioning system is obtained.

A fourth object of the present invention is to obtain a refrigerating / air-conditioning apparatus which can easily recognize the life of the catalyst when the ozone decomposing chamber is composed of an ozone decomposing catalyst.

[0011]

According to the present invention, there is provided a heat exchanger for exchanging heat between a heat medium and heat exchanged air, a blower for supplying the heat exchanged air to the heat exchanger, and the heat exchanger. Is located in the air passage that passes through and is provided downstream of the blower, and electrically insulates the ionization chamber that ionizes the gas in the air by ionizing the electrons in the passing air and the air passage. A refrigeration / air-conditioning device is configured by providing a microbial growth prevention device configured by an ozone decomposition chamber that decomposes and removes ozone contained in the ionized gas in the ionization chamber.

Further, a heat exchanger is arranged on the upstream side of the air flow of the microbial growth prevention device.

The blower is arranged downstream of the heat exchanger in the air flow.

Further, an outer box having an air inlet and an air outlet and forming an air passage, and a heat exchange arranged in the outer box for exchanging heat between the heat medium and the heat-exchanged air. In a refrigeration / air-conditioning apparatus having a fan and a blower blade formed of an electrically insulating material, and a blower that is located downstream of the heat exchanger and supplies heat-exchanged air to the heat exchanger, An ionization chamber that ionizes the gas in the air by ionizing electrons to the passing air, and is electrically insulated from the air passage, and decomposes and removes ozone contained in the ionized gas. A device for preventing microbial growth composed of an ozone decomposing chamber is arranged in an air passage located between the heat exchanger and the blower.

Further, a filter is arranged in the upstream air passage of the microbial growth prevention device.

Furthermore, ion detection means for detecting the amount of ions generated from the microbial growth prevention device, and comparison means for comparing the detected ion amount detected by this ion detection means with a preset target ion supply value, An ion generation amount control unit for controlling the amount of ions generated from the microbial growth prevention apparatus based on the output signal from the comparison unit is provided.

The ion generation amount control means controls the ion generation amount by controlling the rotation speed of the blower.

Further, the ion generation amount control means controls the ion generation amount by controlling the voltage applied to the ion generation means in the ionization chamber.

Further, a temperature detecting means for detecting the temperature of the space for storing an object in which microorganisms propagate or an air-conditioned space, a humidity detecting means for detecting the relative humidity in the space, and the temperature detector. A calculation unit that calculates the absolute humidity based on the temperature and the relative humidity detected by the humidity detector, and an ion generation amount that controls the amount of ions generated from the microbial growth prevention device based on the absolute humidity calculated by this calculation unit. And a control means.

The ozone decomposition chamber is composed of a heating element covered with an electrically insulating material.

Further, the heating element is composed of a heating resistor, and a current supply control section for controlling the supply of current to the heating resistor is provided.

The ozone decomposing chamber is composed of a transparent member or a mesh member containing an ozone decomposing catalyst such as manganese dioxide.

Further, the air duct constituent member to which the ozone decomposing chamber is attached can be attached to and detached from the air duct.

Furthermore, the air duct component having the ozone decomposing chamber is made of a transparent material.

The heat exchanger for exchanging heat between the heat medium and the heat-exchanged air, the blower for supplying the heat-exchanged air to the heat exchanger, and the air passage passing through the heat exchanger, A microbial growth prevention device that has an ionization chamber that ionizes the gas in the air and generates ozone by applying a high voltage, and ozone that detects the amount of ozone in a space that stores an object in which microorganisms grow or an air-conditioned space Detection means,
The refrigeration / air-conditioning system is configured by providing ozone generation amount control means for controlling the ozone generation amount so that the ozone detection value detected by the ozone detection means becomes a predetermined value.

[0026]

In the refrigeration / air-conditioning apparatus configured as described above, the microbial growth prevention device is provided downstream of the blower that supplies the heat-exchanged air to the heat exchanger. Ions do not pass through the blower, and therefore can be supplied to the storage space for microbial propagation objects or the air-conditioned space by suppressing the disappearance of the ions, effectively preventing the growth of microorganisms and cleaning the air-conditioned space. It can be carried out. Further, since the heat exchange blower can also be used as a microbial growth prevention blower, it is possible to obtain a refrigeration / air-conditioning apparatus that is low in price and has high microbial growth prevention performance and high cleaning performance as described above.

Furthermore, by disposing a heat exchanger on the upstream side of the air flow of the microbial growth prevention device, it is possible to prevent the generated ions from disappearing in the blower and the heat exchanger,
Further, it is possible to obtain a refrigerating / air-conditioning machine having a more efficient microbial propagation preventing performance or a cleaning performance of an air-conditioned space.

Further, the heat exchanger, the microbial growth preventing device, and the blower are arranged in this order from the upstream side of the air flow in the outer box, and the blower blades are made of an electrically insulating material, so that the ions generated in the microbial growth preventing device are formed. Can be prevented from disappearing when passing through a blower, and the constituent devices can be configured as a unit housed in an outer box, so installation and transportation are easy, and construction costs can be reduced.

Furthermore, by disposing a filter on the upstream side of the air flow of the microbial growth prevention device, it is possible to prevent dust and foreign matter from entering the microbial growth prevention device and prevent performance deterioration of the device.

Further, the amount of ions generated from the microbial growth prevention device is detected by the ion detection means, and the amount of ions detected is controlled by the ion generation amount control means so that the detected ion amount becomes the target value of supplied ions.

Further, by utilizing the characteristic that the amount of generated ions changes depending on the wind speed supplied to the microbial growth prevention device, the rotation speed of the blower is controlled so that the detected amount of ions converges to the target supply ion value.

Further, by utilizing the characteristic that the amount of generated ions changes according to the voltage applied to the ion generating means, the voltage detected by controlling the voltage applied to the ion generating means in the ionization chamber constituting the microbial growth preventing apparatus is detected. The amount is converged to the target value of the supplied ion.

Further, since the ion supply amount to the space for storing the microorganism-propagating object or the space to be air-conditioned varies depending on the absolute humidity, the ion generation amount control means is based on this characteristic. To control.

The ozone decomposition chamber is composed of a heating element covered with an electrically insulating material.

Further, the supply current control unit controls the supply current to the heating element composed of an electric resistor to change the ozone decomposing ability to prevent the growth of microorganisms.
Alternatively, in maintaining the cleanliness of the air-conditioned space, the ratio between the amount of ions and the amount of ozone can be controlled to an optimum ratio.

Further, since the ozone decomposing catalyst such as manganese dioxide discolors at the end of its life, it is possible to easily know the catalyst life by forming the ozone decomposing chamber with a transparent member or a mesh member.

Further, by making the air duct component having the ozone decomposing chamber attached to and detachable from the air duct, maintenance and inspection of the ozone decomposing chamber can be facilitated. Further, when an ozone decomposition catalyst such as manganese dioxide is used, it is easy to confirm and replace its life.

Further, by forming the air passage forming member to which the ozone decomposing chamber is attached with a transparent member, the transparent member of the ozone decomposing chamber or the catalyst such as manganese dioxide easily filled from the outside through the mesh member is used. It is possible to know the replacement time (white when it reaches the end of its life).

Further, the ions and ozone generated by the microbial growth prevention device are supplied to a space for storing microbial growth objects such as food or an air-conditioned space, and the ozone amount in the space is detected by ozone detecting means. Then, the ozone generation amount control means controls the ozone detection value to be a predetermined value. As a result, a predetermined amount of ozone and ions can be constantly supplied to the space, and the synergistic effect of preventing the growth of microorganisms or the cleaning action of the air-conditioned space is further improved.

[0040]

【Example】

Example 1. FIG. 1 is a block diagram showing a cooling device which is an embodiment of a refrigerating / air-conditioning device according to the present invention, and FIG. 2 is a detailed view of a microbial growth preventing device. In these figures, 6
Reference numeral 5 denotes a cooler as a heat exchanger for exchanging heat between the refrigerant and the heat-exchanged air (air in the refrigerator in this embodiment). 67 is a blower that supplies heat-exchanged air to the cooler 65, 67a is a blower blade, and 67b is a drive motor that drives the blower blade 67a. 68 is a fan cover provided with an air outlet, and 66 is the cooler 6
Drain pan that receives and drains the condensed water generated in 5
Is a cooling unit constituted by the cooler 65, the blower 67, the fan cover 68, the drain pan 66, the outer box 75, and the like, and the ceiling portion 7 of the refrigerator 71 is mounted via the mounting plate 69.
It is suspended on 1a. Reference numeral 22 denotes the air cooled by the cooler 65, which will be described later in an ionization chamber 23 and an ozone decomposition chamber 2
8 is an air-passage forming member that forms an air-passage 22b that leads to No. Two
Is an electrode composed of a plurality of metal fine wires (for example, a diameter of 0.2 mm or less) or metal needles, and 25 is a mesh-shaped (for example, about 10 mesh) arranged so as to face the metal needle (or metal fine wire) side electrode 2. Metal ground electrodes 4 are high-voltage generators that apply a high voltage between the metal needle side electrode 2 and the metal ground electrode 25 to generate corona discharge from the metal needle side electrode 2. Two
Reference numeral 4 denotes a bushing made of an insulating material, which is attached to the air duct component member 22. As described above, in this embodiment, the ionization chamber 23 is constituted by the metal needle side electrode 2, the metal ground electrode 25, the bushing 24, the air passage forming member 22 also serving as the casing, and the like.

27 is a gas ionized in the ionization chamber 23 as described later, 28 is installed in the air passage 22b,
The ozone decomposition chamber decomposes and removes ozone contained in the ionized gas 27 in the ionization chamber 23, and is filled with an ozone decomposition catalyst such as manganese dioxide, activated carbon or activated alumina. Reference numeral 29 denotes an insulator that electrically insulates the ozone decomposing chamber 28 from the air duct forming member 22, and in this embodiment, a part of the air duct forming member 22, that is, a portion where the ozone decomposing chamber 28 is installed and its peripheral portion. However, it is made of an organic insulating material such as polyethylene, polyvinyl chloride or acrylic resin, or an inorganic insulating material such as glass or quartz. Reference numeral A is a microbial growth prevention device constituted by the ionization chamber 23, the ozone decomposition chamber 28 and the like. 31 is the ionization chamber 23 and the ozone decomposition chamber 28.
The microbial growth prevention apparatus A, which is a support member attached to the air passage component member 22 located between them, is installed in the ceiling portion 71 of the refrigerator 71.
It is suspended on a. Reference numeral 30 denotes air blown from the ozone decomposition chamber 28, which is air containing ionized gas containing no ozone. Reference numeral 8 is a microorganism breeding object such as food stored in the refrigerator 71.

Next, the operation will be described. First, the blower 67 of the cooling unit 70 supplies the in-compartment air 72 to the cooler 65 to cool it, and sends it out from the fan cover 68 having the air outlet. The air 1 sent out is used as a microbial growth prevention device A
From the supply port 22a, and is introduced into the ionization chamber 23 through the air passage 22b. The distance between the thin metal wire (for example, having a diameter of 0.2 mm or less) or the metal needle electrode 2 in the ionization chamber 23 and the mesh-shaped (for example, about 10 mesh) metal ground electrode 25 arranged to face the electrode 2. When the (gap length) is set to about 10 to 20 mm and a negative current voltage of 5 to 10 kV is applied, a high electric field is applied to the vicinity of the tip of the metal needle side electrode 2 to cause electron discharge. Therefore, when the gas 1 is introduced into the ionization chamber 23 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 negative ions. .

At this time, ozone is generated at the same time that negative ions are generated, and the negatively ionized gas 27 contains ozone. Since ozone is highly oxygenated and harmful when the ozone concentration exceeds a certain value, a gas 27 containing negative ions and ozone is introduced to the ozone decomposition chamber 28, and ozone is decomposed and removed by an ozone decomposition catalyst. The negatively ionized gas 30 containing no gas is discharged into the space inside the refrigerator 71. It should be noted that when ozone is decomposed by the ozone decomposition catalyst 28, oxygen, which is an active species having a strong oxidizing power, is generated, and ethylene generated from vegetables, flowers, fruits, etc. stored in the refrigerator 71 is decomposed by the oxygen of this active species. To be done. The odorous substance contained in the gas 1 is also decomposed by the oxygen of the active species.

Therefore, a large amount of the negatively ionized gas 30 can be released into a space or the like where an object or the like in which the microorganisms propagate, and the propagation of the microorganisms in the object or the like can be suppressed (negatively ionized). There is an experimental example that proves that the microorganisms can be suppressed from being propagated by the gas 30. The explanation of this experimental example will be described later.)

Here, one embodiment carried out to demonstrate that the negative ions generated in the microbial growth prevention apparatus in the first embodiment are hardly reduced in the ozone decomposition chamber 28 will be described. In this example, the diameter is 0.18 m
3 thin tungsten wire electrodes 2 of m are arranged at intervals of 20 mm, the gap length between the metal needle electrode 2 and the metal ground electrode 25 (stainless steel of 10 mesh) is 10 mm, and the DC voltage applied between both electrodes is 5 kV. The velocity of the air passing between the two electrodes is set to about 2 m / s, the ozone decomposition chamber 28 is installed in the portion of the insulator 29 made of an insulating material such as acrylic resin, and the temperature of the air supplied. 5 ℃,
Humidity is 95%.

Negative ions were generated under such conditions, and the ion concentration of the ionized gas 27 was measured using an ion densitometer. As a result, the negative ion concentration at the outlet of the ionization chamber 23 was about 10 ⁶ / It was cm ³ , and the negative ion concentration of the ionized gas 30 immediately after passing through the ozone decomposition chamber 28 was about 10 ⁵ / cm ³ .

As described above, when the ozone decomposing chamber 28 is installed in the portion where the air duct forming member 22 is made of the insulator 29, the concentration of negative ions passing through the ozone decomposing chamber 28 is reduced to about 1/10, but ionization is performed. The concentration of ions contained in the vaporized gas 30 is the concentration of ions contained in normal air (800
˜1000 pieces / cm ³ ) and more than 100 times higher, and several tens times higher than when the ozone decomposition chamber 28 is directly installed in the air passage 22b made of a metal material such as stainless steel as in the conventional one. It was a thing.

On the other hand, the ozone simultaneously generated by the discharge is the ionized gas 2 on the upstream side of the ozone decomposition chamber 28.
7 contained about 0.2 to 0.4 ppm, but after passing through the ozone decomposition chamber 28, the ionized gas 30
Had an ozone concentration of 0.01 ppm or less (below the detection limit of the JIS standard potassium iodide method). From the above,
According to this Example 1, it is found that ozone can be removed while maintaining the ion concentration of the gas 30 negatively ionized sufficiently.

Although the number of thin wires of the metal thin wire electrode 2 is three in the above embodiment, the amount of generated ions can be increased by further increasing the number. But,
At the same time, the amount of ozone generated also increases, so the ozone decomposition chamber 2
It is necessary to increase the thickness (weight) of the ozone decomposition catalyst in 8. Further, in the above embodiment, the DC applied voltage is 5 kV.
However, if the applied voltage is further increased as shown in FIG. 3, the ion generation amount can be increased, but at the same time, the ozone generation amount is also increased. When the gap length was 10 mm, the amount of generated ions increased as the applied voltage increased in the voltage range of several kV to 10 kV. Further, in this experiment, a DC negative voltage was applied to the thin metal wire electrode 2, but it is desirable to apply a pulsed DC negative voltage of a commercial frequency or higher because the amount of ozone generated is suppressed and the negative ion generation efficiency is improved.

Regarding the gap length, the voltage is 5 k
When V was set, a short circuit occurred when the length was several mm or less. Therefore, at least 7 to 8 mm or more is required. Further, in the present embodiment, air having a wind speed of 2 m / s was flown between both electrodes, but as shown in FIG. 4, the amount of negative ions generated increases as the wind speed increases. Therefore, it is desirable that the cross-sectional area of the air passage 22 in which the ionization chamber 23 of the microbial growth prevention apparatus A is installed be as small as possible within the range where the ventilation pressure loss is allowed to increase the flow velocity. Although an insulating material made of acrylic resin is used as the insulator 29 in the above embodiment, the same effect can be obtained by using an insulating material such as polyethylene, polyvinyl chloride, glass or quartz glass.

Next, an experimental example demonstrating that microbial growth can be suppressed by the ionized gas 30 will be shown. The inside of the refrigerator 71 is 0 ° C to 5 ° C from the cooling unit 70.
It is cooled to about ℃. When the blower 67 is operated in this state, as in the case of the first embodiment, the ozone decomposing chamber 28 generates the ozone-free negative ionized gas 30. Therefore, the ozone-free negative ionized gas 30 is stored in the refrigerator. It is supplied to the storage space for food and the like in 71. As a result, the ion concentration in the refrigerator 71 gradually increases,
Some of the generated negative ions are on the wall surface of the refrigerator 71 and the cooler 6.
As the negative ion concentration in the refrigerator 71 is maintained at a substantially constant value, the negative ion concentration in the refrigerator 71 is maintained at a substantially constant value. Therefore, since the negative ions are continuously supplied to the stored product 8 such as food stored in the refrigerator 71, it is possible to suppress the propagation of microorganisms in the food or the like.

The proper negative ion concentration in the refrigerator 71 varies depending on the type of food or the conditions such as temperature and humidity in the refrigerator 71, but according to the experimental results, the negative ion concentration usually present in the air (10 The effect of preventing the reproduction of microorganisms is recognized even at an extremely low concentration of about several times (about 100 pieces / cm ³ ). However, preferably 10 times to 1,0
Negative ion concentration of 00 times, that is, 10 ³ to 10 ⁵ / c
Setting m ³ is highly effective and economical. Less than,
It will be explained by using an experimental example that the growth of microorganisms is suppressed by negative ions. FIG. 5 shows the experimental results of this experimental example. In the experiment, sashimi raw fish was used as a stored material 8 such as food, and this was stored in a refrigerator 71 at a temperature of 5 ° C. and a humidity of 80 to
It was stored for 3 days under the condition of 95% and continuously treated with negative ions generated in the ozone decomposition chamber 28. A voltage of ³ to ⁵ kV was applied between the electrodes of the ionization chamber 23 to maintain the ion concentration in the refrigerator 71 at about 10 ³ to 10 ⁴ ions / cm ³ . Further, in order to further clarify the effect of the invention, the difference in effect between the case of no treatment and the case of treating ozone by contacting the food 8 without contacting with negative ions is compared. In the ozone treatment, the ozone concentration in the refrigerator 71 was maintained at about 1.0 ppm, and the sample tuna sashimi was indiscriminately extracted from each of the five tuna sashimi into five fillets. The sampling of general bacteria on the surface of the food 8 was performed by the stamp method, and the medium was a standard agar medium.

As shown in FIG. 5, in the case of no treatment (without supplying negative ions and ozone), the tuna sashimi began to show a blackish color on the third day after the preservation, and the freshness was deteriorated. Again, a rotten odor was generated. At this time, the number of general bacteria on the surface of the tuna sashimi grew to about 200 / cm ² .

When continuously treated in an extremely low-concentration ion atmosphere of 10 ⁴ cells / cm ³ , the sashimi was able to completely maintain the initial freshness for 3 days. In addition, there is no rotten odor, and the number of viable cells on the surface after 3 days is about 20 as shown in FIG.
It was almost the same number as before the start of the experiment in the number / cm ^2.

Further, when continuously treated with ozone at a concentration of about 1 ppm, there was almost no rotten odor as in the negative ion treatment, and the number of viable cells on the surface was almost the same as in the negative ion treatment. However, the appearance of the tuna sashimi changed its color to reddish black due to the strong oxidizing action of ozone, resulting in a problem that the quality was remarkably deteriorated.

Next, FIG. 6 shows the bacteria artificially planted in the agar medium instead of the food 8 (microorganisms collected from dust attached to the fan of the air conditioner, Pseu.
A petri dish holding Domonas spp. (green concentrated bacterium) was installed in the refrigerator 71, and the effect of the negative ion treatment was examined. Here, the ion concentration of the atmosphere in the refrigerator 71 in which the petri dish was installed was 10 ³ to 10 ⁴ ions / cm ³ , and the temperature and humidity conditions were 25 ° C. and 50 to 70%, respectively. The petri dish was allowed to stand under these conditions for 3 days, and a standard agar medium was used as the medium. Further, the voltage applied between the electrodes of the ionization chamber 23 was set to 3 to 5 kV to generate negative ions.

As shown in FIG. 6, in the case of no treatment, bacterial colonies grew to about 370 cells / dish after 3 days, and when treated with ions, the growth was remarkably suppressed to about 14 / dish after 3 days. The effect was obtained. Also,
In the case of ozone treatment with a concentration of 0.01 ppm (about 3 × 10 ¹¹ pieces / cm ³ ) (about 10 ⁷ times higher than the ion concentration),
No effect of preventing the reproduction of bacteria was observed, and after about 3 days, about 350 cells / dish were proliferated, similar to the case of no treatment.

With respect to the bacteria planted in the agar medium as described above, the reproduction can be prevented by the treatment with an extremely low concentration of negative ions. According to the above experimental results, the ability of the negative ions to prevent the growth of microorganisms is about 10 ^{7 in} the case of ozone. Considered twice as expensive. Note that in FIG. 6, Pseudomonas
Although the effect of negative ions was shown using bacteria of the genus, similar effects can be obtained with other bacteria such as mold, Escherichia coli, and Salmonella.

Further, if the cooler 65 as a heat exchanger is arranged on the upstream side of the air flow of the microbial growth prevention apparatus A, the disappearance of ions due to contact with the cooler 65 can be suppressed and the stored items such as foods can be efficiently stored. 8 can be supplied. That is, as shown in FIG. 1, the cooler 65, the blower 67, the ionization chamber 23 and the ozone decomposition chamber 28 are arranged in this order from the upstream side of the air passage, or the blower 67, the cooler 65, and the ionization chamber 28 are ionized as shown in FIG. By arranging the chamber 23 and the ozone decomposition chamber 28 in this order, the ions generated in the ionization chamber 23 are cooled by the cooler 65 and the blower 6.
In the ozone decomposition chamber 28 without passing through 7, the mixed ozone can be decomposed and removed, and then immediately supplied to the stored material 8 such as food. As a result, it is possible to prevent the disappearance of ions due to contact with the metal members forming the cooler 65 and the blower 67, and it is possible to efficiently suppress the growth of microorganisms in the stored material such as food.

Here, an embodiment of the refrigerating / air-conditioning apparatus shown in FIG. 7 will be described. In the embodiment shown in FIG. 1, the blower 6
7 is a configuration in which the heat-exchanged air in the refrigerator is supplied to the cooler 65 to cause heat exchange and blown out from the fan cover 68 of the cooling unit 70, and the microbial growth prevention apparatus A is arranged on the downstream side thereof. As shown in FIG. 7, a cooling unit 70 is configured by an outer box 82 having a blower 67, an air suction port 82a corresponding to the blower blades 67a, and a drain pan 82b integrally formed, a cooler 65, and the like. Bowl 6
The air 86 blown out through the air conditioner 5 is guided to the air passage 22b of the microbial growth prevention apparatus A, and the heat-exchanged air 72 in the storage is blown by the blower 67 located in the air suction port 82a. It is inhaled, supplied to the cooler 65, cooled, and further delivered to the microbial growth prevention apparatus A (which is constituted by the ionization chamber 23 and the ozone decomposition chamber 28) via the air passage 22b to be ionized. As a result, the ionized gas is immediately supplied to the stored material 8 such as food, so that the cooler 65 and the blower 67 do not extinguish the ions and efficiently prevent the growth of microorganisms.

Furthermore, FIG. 8 shows a refrigerator according to the present invention.
Sectional drawing which shows one Example of an air conditioner, FIG.9 (a), (b)
FIG. 4 is a perspective view showing a duct material. The cooling unit 70 in this embodiment is installed on the upper part of the refrigerator 71, and the heat exchanged air inside the refrigerator is cooled by the operation of the cooling unit 70 through the ceiling opening 71b of the refrigerator 71.
And is cooled. Further, the duct members 110 and 11
1 is supplied to the internal space in which the microorganism-propagating object 8 such as food is stored. Duct 1 above
An ionization chamber 23 and an ozone decomposition chamber 28 are attached to 11, and cold air 30 containing an ionized gas is delivered to the internal space to prevent the growth of microorganisms on food and the like. The ducts 110 and 111 are made of an insulating material,
Since the microbial growth prevention apparatus A can be incorporated in the duct 111, the installation work on the ceiling portion 71a is easy.

Example 2. In the first embodiment, the microbial growth prevention device A is provided on the air outlet side of the cooling unit 70.
As shown in FIG. 10, a microbial growth prevention apparatus A is provided between the cooler 65 and the blower 67, which are provided in the outer box 75 having the air intake port 75a and the air outlet port 75b and forming the air passage 22b.
To place. This microbial breeding prevention apparatus A is configured in the same manner as in Example 1, is equipped with an ionization chamber 23 and an ozone decomposition chamber 28, and generates negative ions in the ionization chamber 23. Decomposes and removes ozone mixed in. Reference numeral 67 is a blower arranged at the air outlet 75b of the outer box 75, and the blower blades 67a are made of an insulating material so that the generated negative ions are not recombined even if they come into contact with each other. 66 is a drain pan that receives the condensed water generated in the cooler 65, and 68 is the blower blade 6
It is a fan cover in which the air outlet corresponding to 7a was formed. Reference numeral 69 is a mounting plate for suspending the cooling unit 70 configured as described above on the ceiling portion 71a of the refrigerator.

In the cooling device configured as described above, the generated negative ions are not recombined (the ions are neutralized) even if they come into contact with the blower blade 67a, so that the reduction of the generated negative ions can be reduced. The same effect as that of the first embodiment can be obtained. In addition, the microbial growth prevention device A has a cooling unit 70.
Since it is built in the device, it is configured compactly, there is no need to install the microbial growth prevention device A again, and the construction cost can be reduced.

Example 3. Device A for preventing microbial growth of dust, etc.
If the filter 80 shown in FIG. 11 is arranged at the inlet of the cooler 65 on the upstream side of the air flow of the microbial growth preventing apparatus A as shown in FIG. It is possible to prevent the generation amount from decreasing.

Also, as shown in FIG. 11, the same effect can be obtained by disposing the filter 80 at the outlet of the cooler on the upstream side of the air flow of the microbial growth prevention apparatus A.

Further, as shown in FIGS. 13 and 14, if a filter 80 for removing dust is arranged at the outlet of the cooler 65 on the upstream side of the air flow of the microbial growth prevention apparatus A, it is similar to the cooling apparatus shown in FIG. The effect is obtained.

Example 4. FIG. 15 shows a cooling device which is an embodiment of a refrigerating / air-conditioning device according to the present invention. In FIG. 15, reference numeral 90 denotes negative ions supplied from the microbial growth preventing device A to the space for storing foods and the like. Negative ion collecting electrode 91 for collecting is a converting device 91 for converting the negative ion generation amount into a current, and the negative ion collecting electrode 90 and the converting device 91 constitute an ion detecting means 90a. Reference numeral 92 is a comparison means for comparing the detected ion amount detected by the ion detection means 90a with a preset supply ion target position (set by the setting device 92a), and 93 is based on the output signal from the comparison means 92. This is an ion generation amount control means for controlling the amount of ions generated from the microbial growth prevention device A. In this embodiment, the number of ions generated is controlled by controlling the rotation speed of the blower 67.

Next, the operation will be described. Negative ions contained in a fixed volume are collected on the collection electrode 90 by the action of an electric field and converted into a current value by the conversion device 91. Then, in the comparison means 92, the value converted by the conversion device 91 is compared with the preset supply ion target value (target current value), and the target negative ion generation amount is obtained based on the output signal from the comparison means 92. Thus, the rotation speed of the blower 67 is controlled by the ion generation amount control means 93. As shown in FIG. 4, if the rotation speed of the blower 67 is changed and the wind speed is changed, the amount of negative ions generated also changes, so that the amount of negative ions in the refrigerator 71 can be kept substantially constant. Since the heat exchange capacity of the cooler 65 also changes by controlling the rotation speed of the blower 67, a bypass path is provided in parallel with the cooler 65, and an air flow rate adjusting device is provided in this bypass path to allow the cooler 65 to operate. It is advisable to adopt a configuration in which the rotation speed control of the blower 67 is interlocked so that the amount of air supplied to the fan does not change. The air flow rate adjusting device may be of a damper type that controls opening and closing of the bypass passage, or an air flow rate adjusting blower may be provided to control the rotation speed of the blower.

In the above embodiment, the number of revolutions of the blower 67 is changed so that the amount of negative ions generated becomes the target value.
As described above, the same effect can be obtained by controlling the applied voltage of the high voltage generator 4 for generating negative ions by the ion generation amount control means 73. The relationship between the applied voltage and the amount of negative ions generated is as shown in FIG. The same effect can be obtained by detecting the amount of negative ions generated and intermittently applying the voltage applied to the high voltage generator 4. With the configuration that can be controlled as described above, it is possible to control to the optimum supply ion target value according to the type of the microbial breeding object 8 or the like to be stored. The purification action of the air-conditioned space can be maintained under optimum conditions.
In the above embodiment, the ion detecting means 90a is used.
The amount of generated ions is detected, and the generated amount of ions is controlled so as to reach the target value. However, the ion concentration detecting means detects the ion concentration of the space or the like in which the microbial propagation object 8 such as food is stored. Even if the ion generation amount control means 93 controls the ion concentration to a predetermined value, a similar effect can be obtained.

Example 5. 17 and 19 are configuration diagrams showing a cooling device which is a refrigerating / air-conditioning device according to the present invention.
In the figure, 1, 4, 8, 22, 22a, 23, 25, 2
8 to 31, 65 to 72, 67a and 71a are the same as those in the first embodiment.
50 is a temperature detecting means for detecting the temperature inside the refrigerator 71, 51 is a humidity detecting means for detecting relative humidity, and 52 is from the temperature detecting means 50 and the humidity detecting means 51. Calculation unit for calculating absolute humidity, 93
Is an ion generation amount control means for performing correction control so that the ion generation amount returns to the target value when the absolute humidity calculated by the calculation unit 52 changes. In this embodiment, the rotation speed of the blower 67 is corrected and controlled. By doing so, the amount of generated ions is controlled to a target value.

The amount of negative ions generated (pieces / sec) is
As shown in FIG. 16, it fluctuates according to the absolute humidity, and therefore, the ion concentration of the space for storing the microbial propagation object 8 such as food also fluctuates. In order to correct this variation and maintain the optimum ion concentration (pieces / cm ³ ), the characteristic line [ion generation amount (pieces / sec) -wind speed (cm / se) shown in FIG.
Based on c)], the wind speed, and hence the rotation speed of the blower 67, is corrected and controlled so that the amount of generated ions reaches the target value. It should be noted that there is a certain relationship between the ion concentration and the amount of generated ions in the storage space in a stable state,
In this embodiment, correction control is performed according to the type of object to be stored, to an ion generation target value that provides the optimum ion concentration that has been experimentally or empirically obtained in advance.

Further, in the above embodiment, the ion generation amount was controlled to the target value by correcting and controlling the rotation speed of the blower 67. However, the characteristic line [negative ion generation amount (pieces / s
[ec) -Applied voltage], the variation of the negative ion generation amount due to the humidity variation may be compensated by the correction control of the applied voltage.

Example 6. Although the ozone decomposition chamber 28 is filled with a decomposition catalyst such as manganese dioxide, activated carbon, activated alumina, etc. in the first embodiment, FIG.
As shown in (a), (b) and FIGS. 21 (a), (b),
The ozone decomposing chamber 28 may be composed of a grid-shaped heat generating resistor 32 covered with an organic insulating material such as Teflon resin or acrylic resin or an inorganic insulating material such as a ceramic material to thermally decompose ozone. 33 is a grid-shaped heating resistor 3
2 is a current supply unit that supplies or stops current to 2.

Next, the operation will be described. When ozone is decomposed by passing through the grid-shaped heating element 32, only negative ions are generated, and when energization to the grid-shaped heating element is stopped, both ozone and negative ions are generated. Since it is possible to supply a mixed gas of negative ions and only negative ions, it is possible to obtain a cooling device that can perform control suitable for a contained item such as food.

FIG. 20 shows the grid-shaped heating element 32 of the sixth embodiment.
A current supply unit 33 that supplies and stops current as in (b)
And a supply current control section 34 having a timer function section are provided, and a command is issued to the current supply section 33 by a signal from the timer function section.

Next, the operation will be described. The supply current control unit 34 having a timer function can supply a current to the grid-shaped heating element 32 (generate only negative ions) and stop the current (generate ozone and negative ions). Since negative ions can be generated (sterilization power increases with increasing ozone concentration), and only negative ions can be generated when people are present, such as during the daytime, it is possible to control according to the time zone or control suitable for the contents. It is possible to obtain an excellent cooling device.

In the above embodiment, the configuration in which the current supply to the grid-shaped heating element 32 is controlled to be ON / OFF is shown. However, the current value to the grid-shaped heating element 32 is controlled to adjust the ozone decomposing ability. However, it is also possible to supply the ion and ozone as the optimum mixing ratio according to the type of the microorganism-generating substance such as food. In addition, although the heating element in the above-described embodiment is based on electric resistance, it may be configured by a pipe or a closed container to supply a high-temperature heating medium. The high-temperature heat medium may be high-temperature refrigerant gas discharged from the compressor, steam, or high-temperature water. Even when the heating element is formed of a pipe or a closed container as described above, it is covered with the organic insulating material or the inorganic insulating material as described above.

Example 7. 22 (a) is a configuration diagram showing a main part of a refrigerating / air-conditioning apparatus according to the present invention, and FIG. 22 (b) is a perspective view showing an ozone decomposing chamber.
Reference numerals 4, 22, 22a, 22b, 23, 25, 27 and 30 are the same as those in the first embodiment shown in FIG. Reference numeral 28 denotes an ozone decomposing chamber, and 28a denotes an outer frame of the ozone decomposing chamber 28, which is made of a transparent member such as acrylic resin or a see-through net material. Reference numeral 28b denotes a portion that partitions the inside of the outer frame 28a and has a large number of ventilation passages, and accommodates an ozone decomposition catalyst such as manganese dioxide. In the ozone decomposition chamber 28 configured as described above, ozone contained in the ionized gas 27 supplied from the ionization chamber 23 is decomposed and removed by the catalyst and ionized while passing through the ventilation passage 28b. Only the vaporized gas is delivered from the ozone decomposition chamber 28. For example, manganese dioxide becomes white when the ozone decomposing catalyst reaches the end of its operating time, and therefore, if the inspection window 22f is attached to the air passage component 22 having the ozone decomposing chamber 28, it can be easily passed through the outer frame 28a. You can know when to replace it.

Reference numeral 35 is an air passage component to which the ozone decomposing chamber 28 is attached, which is detachably attached to the air passage 22b. In this embodiment, the cross-sectional shape is formed in a U-shape and is attached to both upper and lower surfaces of the ozone decomposition chamber 28, and the flange portions 35a projecting outward from both ends of the U-shape portion.
Is equipped with.

On the other hand, the cross section of the air passage 22b is formed in a rectangular shape, and notches are formed in the front surface, the upper portion, and the lower portion of the air passage 22b so that the ozone decomposition chamber 28 can be inserted therein. At the time of insertion, the flange portion 35a is inserted and fixed to the top plate portion 22c and the bottom plate portion 22d of the air passage 22b by utilizing the elastic action of the U-shaped air passage forming member 35, and the front portion is closed. Block with (not shown). When the ozone decomposing catalyst has reached the end of its life and it is time to replace it, the cover plate is removed and the flange portion 35a is pushed inward and deformed in the reverse order of the time of insertion, and the top plate portion 22c and bottom plate portion 22d are deformed. Remove from

Further, if the air duct component 35 is made of a transparent resin or the like, the ozone can be easily decomposed from the outside through the outer frame 28a of the ozone decomposing chamber 28 and the air duct component 35 at any time. The change and discoloration state of the catalyst can be grasped, and the replacement time of the catalyst is not missed.

Example 8. In the fourth embodiment, the rotation speed of the blower 67 is controlled by the ion generation amount control means 93 so that the amount of ions supplied to the space in which the microbial propagation material such as food is stored becomes the target value, or the ionization means provided with the ion generation means. Although the voltage applied to the chamber 23 is controlled, in this embodiment, the amount of ozone generated due to the generation of ions is detected and, for example, the blower 67 of the blower 67 is controlled so that the detected ozone amount becomes a predetermined value. The number of rotations or the voltage applied to the ionization chamber 23 is controlled.

FIG. 23 is a block diagram showing a cooling device which is a refrigerating / air-conditioning device according to the present invention. In the figure, B is an apparatus for preventing microbial growth provided with an ionization chamber 23, which is a blower 6
Ozone is generated together with ions in the cold air 1 supplied by 7 and is supplied as cold air 30 to the microorganism-propagating object 8 such as food. Reference numeral 61 is an ozone detecting means for detecting the amount of ozone contained in the cold air 30, and 62 is a predetermined ozone detection value (ozone generation amount) detected by the ozone detecting means 61 (ozone concentration is 0.1 ppm or less). , Preferably about 0.03 ppm) for controlling the ozone generation amount, and in this embodiment, the high pressure generator 4
Or the generated voltage is controlled.

As described above, by supplying the ions and ozone of a predetermined low concentration to the space for storing the substance in which the microorganisms propagate or the space to be conditioned, the synergistic effect with the ozone is provided as compared with the case of supplying only the ions alone. More effectively suppress the growth of microorganisms, or more effectively clean the air-conditioned space, corrosion of equipment constituting the device,
It is possible to eliminate adverse effects on the human body.

In the above embodiment, the ozone generation amount control means 62 controls the operation of the high pressure generator 4 or the generated voltage to maintain the ozone generation amount at a predetermined value. As shown in FIG. 24, the rotation speed of the blower 67 is controlled so that the ozone detection value detected by the ozone detection means 61 becomes the above-mentioned predetermined value, and the same effect is obtained.

[0086]

As described above, in the refrigeration / air-conditioning apparatus according to the present invention, the heat exchanger for exchanging heat between the heat medium and the heat-exchanged air, and the blower for supplying the heat-exchanged air to the heat exchanger. , Located in the air passage passing through the heat exchanger, and provided on the downstream side of the blower, for ionizing the gas in the air by ionizing electrons to the passing air, and for the air passage By providing a microbial growth prevention device that is electrically insulated and has an ozone decomposition chamber that decomposes and removes ozone contained in the gas ionized in the ionization chamber, the ionized gas passes through the blower. Since it can be supplied to a microorganism-propagating object such as food without being used, the disappearance of ions can be reduced, which is effective. In addition, the heat exchange blower can also be used as a microbial prevention blower, so it is inexpensive and has a high microbial growth prevention capability.
An air conditioner can be obtained.

Furthermore, by disposing the heat exchanger on the upstream side of the microbial growth prevention device, the generated ions do not pass through the heat exchanger, the blower, etc., and therefore the disappearance of the ions is suppressed, and the direct microorganisms are prevented. Can be supplied to an object that propagates, and the growth of microorganisms can be efficiently prevented. Alternatively, by supplying air containing ions to the air-conditioned space, the space can be kept clean.

Further, from the upstream side of the air flow, the heat exchanger,
Similar effects can be obtained even when a blower and a microbial growth prevention device are arranged.

Further, an outer box having an air inlet and an air outlet and forming an air passage, and heat exchange for heat exchange between the heat medium and the heat exchanged air, which is arranged in the outer box. In a refrigeration / air-conditioning apparatus having a fan and a blower blade formed of an electrically insulating material, and a blower that is located downstream of the heat exchanger and supplies heat-exchanged air to the heat exchanger, An ionization chamber that ionizes the gas in the air by ionizing electrons to the passing air, and is electrically insulated from the air passage, and decomposes and removes ozone contained in the ionized gas. By installing a microbial growth prevention device composed of an ozone decomposition chamber in the air passage located between the heat exchanger and the blower, the microbial growth prevention device is housed in the outer box without a separate microbial growth prevention device. Compact as a single unit Stops, improved construction properties, it is possible to reduce the construction cost, can be supplied efficiently ions to an object microorganisms breed.

Furthermore, by providing a filter in the upstream air passage of the microbial growth prevention device, it is possible to prevent dust and the like from entering the microbial growth prevention device and prevent a decrease in the amount of generated ions.

Furthermore, ion detection means for detecting the amount of ions generated from the microbial growth prevention device, and comparison means for comparing the detected ion amount detected by this ion detection means with a preset target ion supply value, By providing an ion generation amount control means for controlling the amount of ions generated from the microbial growth prevention device based on the output signal from the comparison means, the amount of supplied ions to the object in which the microorganisms propagate or the air-conditioned space is always constant. Since it can be maintained at a high level, the growth of microorganisms can be suppressed to a minimum. Alternatively, the air-conditioned space can be kept clean. Further, since it is possible to supply the ion amount suitable for the type of the object in which the microorganisms propagate or the ion amount according to the demand degree of the air-conditioned space, it is possible to suppress the growth of the microorganisms to a minimum or The cleanliness can be effectively improved and a more comfortable air-conditioned space can be realized.

The ion generation amount control means can control the ion generation amount by controlling the rotation number of the blower, and can generate the same effect as the above.

Further, since the ion generation amount control means controls the ion generation amount by controlling the voltage applied to the ion generation means of the ionization chamber by the applied voltage control means, the heat exchange such as the rotation speed control of the blower is performed. Stable operation can be continued without any impact on capacity.

Further, a temperature detecting means for detecting a temperature in a space for storing an object in which microorganisms propagate or an air-conditioned space, and a humidity detecting means for detecting a relative humidity in the space.
A calculation unit that calculates the absolute humidity in the space based on the humidity and the relative humidity detected by the temperature detector and the humidity detection unit, and the ions generated from the microbial growth prevention device according to the absolute humidity calculated by the calculation unit. By providing the ion generation amount control means for controlling the amount of ions, even if the absolute humidity in the space changes and the amount of ions changes, the ion generation amount control means responds to compensate for this change. The amount can be maintained at a predetermined value, and a stable microbial growth preventing action can be continued. Alternatively, cleaning of the air-conditioned space can be continued stably.

Further, since the ozone decomposing chamber is constituted by the heating element coated with the electrically insulating material, the ozone decomposing / removing efficiency can be improved and the disappearance of ions can be minimized.

Further, the heating element is constituted by a heating resistor, and a supply current control section for controlling the supply of current to the heating resistor is provided to change the mixing ratio of the amount of ions and the amount of ozone for supply. Therefore, it is possible to prevent the microbial growth by supplying a mixed gas of the most suitable ratio according to the type of stored microbial propagation objects and the required degree of the conditioned space, or to clean the conditioned space. Can be done. Also, a mixed gas of ions and ozone, or only ions can be supplied according to the time zone,
For example, a mixed gas of ions and ozone can be supplied when there are no people, and only ions can be supplied when people are present, such as during the daytime, to maximize the effect of preventing the growth of microorganisms while considering the effects on the human body. .

Further, since the ozone decomposing chamber for accommodating the ozone decomposing catalyst such as manganese dioxide is composed of the transparent member or the mesh member, it is possible to easily know the life due to its discoloration and the like, and to know the catalyst replacement time. You can

Further, by making the air duct component having the ozone decomposing chamber attached to and detachable from the air duct, maintenance and inspection of the ozone decomposing chamber can be facilitated. Further, when an ozone decomposition catalyst such as manganese dioxide is used, it is easy to confirm and replace its life.

Further, by forming the air passage component having the ozone decomposing chamber with a transparent member, a catalyst such as manganese dioxide which is easily filled from the outside through the transparent member of the ozone decomposing chamber or the mesh member is used. It is possible to know the replacement time (white when it reaches the end of its life).

Further, a heat exchanger for exchanging heat between the heat medium and the heat-exchanged air, a blower for supplying the heat-exchanged air to the heat exchanger, and an air passage passing through the heat exchanger, A microbial growth prevention device that has an ionization chamber that ionizes the gas in the air and generates ozone by applying a high voltage, and ozone that detects the amount of ozone in a space that stores an object in which microorganisms grow or an air-conditioned space By providing the detection means, the ozone generation amount control means for controlling the ozone generation amount so that the ozone detection value detected by this ozone detection means becomes a predetermined value, a space for storing an object in which microorganisms propagate, Alternatively, it is possible to more effectively suppress the growth of microorganisms due to the synergistic effect of ozone and to suppress the conditioned space more than when supplying ions and ozone of a predetermined low concentration to the conditioned space. Ri can be effectively cleaned.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a refrigerating / air-conditioning apparatus according to a first embodiment of the present invention.

FIG. 2 is a detailed view of a microbial growth prevention device for a refrigeration / air-conditioning device of the present invention.

FIG. 3 is a characteristic diagram showing the relationship between the applied voltage [kV] to the ionization chamber and the negative ion generation amount [pieces / sec].

FIG. 4 is a characteristic diagram showing a relationship between a wind velocity [cm / sec] supplied to an ionization chamber and a negative ion generation amount [pieces / sec].

FIG. 5 is a table showing the experimental results demonstrating that suppression of microbial reproduction by ions.

FIG. 6 is a table showing the experimental results demonstrating that bacterial growth can be suppressed by ions.

FIG. 7 is a configuration diagram of another refrigeration / air-conditioning apparatus according to Embodiment 1 of the present invention.

FIG. 8 is a sectional view showing still another refrigerating / air-conditioning apparatus according to Embodiment 1 of the present invention.

9 is a perspective view showing a duct member of the refrigeration / air-conditioning apparatus shown in FIG.

FIG. 10 is a configuration diagram of a refrigeration / air-conditioning apparatus according to Embodiment 2 of the present invention.

FIG. 11 is a diagram showing a filter of a refrigerating / air-conditioning apparatus according to Embodiment 3 of the present invention.

FIG. 12 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 3 of the present invention.

FIG. 13 is a configuration diagram of another refrigeration / air-conditioning apparatus according to Embodiment 3 of the present invention.

FIG. 14 is still another refrigeration system according to the third embodiment of the present invention.
It is a block diagram of an air conditioner.

FIG. 15 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 4 of the present invention.

FIG. 16 is a configuration diagram of another refrigeration / air-conditioning apparatus according to Embodiment 4 of the present invention.

FIG. 17 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 5 of the present invention.

FIG. 18: Absolute humidity of supplied air [Kg / Kg]
FIG. 4 is a characteristic diagram showing the relationship between the amount of negative ions generated in the ionization chamber [number / sec].

FIG. 19 is a configuration diagram of another refrigeration / air-conditioning apparatus according to Embodiment 5 of the present invention.

FIG. 20 (a) is a configuration diagram of a microbial growth prevention apparatus for a refrigeration / air-conditioning apparatus according to a sixth embodiment. FIG. 20 (b)
Is the heating element.

FIG. 21 (a) is a configuration diagram of another microbial growth prevention apparatus for a refrigeration / air-conditioning apparatus according to the sixth embodiment. Figure 21
(B) is a heating element control block diagram.

FIG. 22A is a configuration diagram of a refrigerating / air-conditioning apparatus according to a seventh embodiment. FIG. 22B is a perspective view showing the ozone decomposition chamber.

FIG. 23 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 8 of the present invention.

FIG. 24 is a configuration diagram of another refrigeration / air-conditioning apparatus according to Embodiment 8 of the present invention.

FIG. 25 is a configuration diagram showing a conventional microbial growth prevention device.

FIG. 26 is a configuration diagram showing a conventional cooling device.

[Explanation of symbols]

 22b Air path 23 Ionization chamber 28 Ozone decomposition chamber 32 Heating element 34 Supply current control section 35 Air path configuration member 50 Temperature detection means 51 Humidity detection means 52 Calculation section 61 Ozone detection means 62 Ozone generation control means 65 Heat exchanger 67 Blower 67a Blower blade A, B Microbial growth prevention device 75 Outer box 75a Air suction port 75b Air blowout port 80 Filter 90a Ion detection means 92 Comparison means 93 Ion generation amount control means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Tanimura 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Institute (72) Inventor Naoki Nakatsugawa 8-1-1 Tsukaguchihonmachi, Amagasaki Mitsubishi Electric Central Research Institute, Inc. (72) Inventor Akira Ikeda 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Institute

Claims (15)

[Claims] 1. A heat exchanger for exchanging heat between a heat medium and heat-exchanged air, a blower for supplying heat-exchanged air to the heat exchanger, and an air passage passing through the heat exchanger, and An ionization chamber that is provided on the downstream side of the blower and ionizes the gas in the air by ionizing electrons to the passing air, and is electrically insulated from the air passage and ionized in the ionization chamber. A refrigeration / air-conditioning device comprising: a microbial growth prevention device configured by an ozone decomposition chamber that decomposes and removes ozone contained in gas. 2. The refrigeration / air-conditioning system according to claim 1, wherein the heat exchanger is arranged upstream of the microbial growth prevention device in the air flow. 3. The refrigeration / air-conditioning system according to claim 1, wherein the blower is arranged downstream of the heat exchanger in the air flow. 4. An outer box having an air intake port and an air outlet port and forming an air passage; and an outer box disposed in the outer box.
A heat exchanger for exchanging heat between the heat medium and the heat-exchanged air, and a fan blade formed of an electrically insulating material, located downstream of the heat exchanger, and the heat-exchanged air in the heat exchanger. A blower for supplying the ionization chamber, which ionizes the gas in the air by ionizing the electrons to the passing air, and is electrically insulated from the air passage,
A microbial growth prevention device constituted by an ozone decomposition chamber for decomposing and removing ozone contained in the ionized gas is arranged in an air passage located between the heat exchanger and the blower. Refrigerating / air conditioning system. 5. The filter according to claim 1, wherein a filter is provided in the upstream air passage of the microbial growth prevention device.
The refrigeration / air-conditioning device according to any one of 1. 6. Ion detection means for detecting the amount of ions generated from the microbial growth prevention device, and comparison means for comparing the detected ion amount detected by this ion detection means with a preset target supply ion value. 6. An ion generation amount control unit for controlling the amount of ions generated from the microbial growth prevention device based on the output signal from the comparison unit, according to any one of claims 1, 4 and 5. Refrigeration / air conditioning system as described. 7. The refrigerating / air-conditioning apparatus according to claim 6, wherein the ion generation amount control means controls the rotation speed of the blower. 8. The refrigeration / air-conditioning system according to claim 6, wherein the ion generation amount control means includes an applied voltage control means for controlling a voltage applied to the ion generation means in the ionization chamber. 9. A space for storing an object in which microorganisms propagate,
Alternatively, temperature detection means for detecting the temperature of the air-conditioned space, humidity detection means for detecting the relative humidity in the space, absolute temperature based on the temperature detected by the temperature detector and the relative humidity detected by the humidity detector. 5. A calculation unit for calculating humidity, and an ion generation amount control unit for controlling the amount of ions generated from the microbial growth prevention apparatus based on the absolute humidity calculated by this calculation unit. Claim 5
The refrigeration / air-conditioning device according to any one of 1. 10. The refrigeration / evaporation chamber according to claim 1, wherein the ozone decomposition chamber is composed of a heating element covered with an electrically insulating material.
Air conditioner. 11. The refrigerating / air-conditioning apparatus according to claim 10, wherein the heating element is composed of a heating resistor, and a supply current controller for controlling the supply of current to the heating resistor is provided. 12. The ozone decomposing chamber is composed of a transparent member or a mesh member for accommodating an ozone decomposing catalyst such as manganese dioxide. The refrigeration / air-conditioning device according to any one. 13. The refrigerating / air-conditioning apparatus according to claim 12, wherein the air duct component having the ozone decomposing chamber attached thereto is attachable to and detachable from the air duct. 14. The refrigerating / air-conditioning apparatus according to claim 12, wherein the air passage forming member to which the ozone decomposing chamber is attached is formed of a transparent member. 15. A heat exchanger for exchanging heat between the heat medium and the heat exchanged air, a blower for supplying the heat exchanged air to the heat exchanger, and a high voltage located in an air passage passing through the heat exchanger. A microbial growth preventing device having an ionization chamber that generates ozone while ionizing the gas in the air by applying, a space for storing an object in which microorganisms grow, or an ozone detecting means for detecting the amount of ozone in the air-conditioned space, A refrigeration / air-conditioning apparatus comprising an ozone generation amount control means for controlling the ozone generation amount so that the ozone detection value detected by the ozone detection means becomes a predetermined value.