JP3477950B2 - Refrigeration and air conditioning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating / air-conditioning apparatus having functions such as prevention of microbial growth and deodorization.

[0002]

2. Description of the Related Art FIG. 37 is a cross-sectional view of a conventional microbial growth preventive device described in, for example, the 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, countless discharges (corona discharges) generated in the discharge space
The energy of changes oxygen 1 (in the air) (3
0 ₂ → 20 ₃ ), ozone is generated.

FIG. 38 will be described. The figure shows that by supplying a gas containing ozone to the food stored in the refrigerator,
It prevents the growth of microorganisms generated in the food. 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 generally said that if released as it is, it is harmful to the human body. Also, heat exchangers and fans 11
There is a risk of corroding equipment (specifically, if the ozone concentration in the refrigerator 7 is increased to 0.1 ppm or more, the color may change or deteriorate depending on the type of food, the heat exchanger 9 of the cooler 9, Equipment such as the fan 11 is 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 the 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, and prevents the growth of microorganisms by supplying ions that do not affect the human body, or refrigeration / cooling with a high purification capacity for the air-conditioned space. It is to obtain an air conditioner.
Moreover, in order to prevent the above-mentioned microorganisms from breeding or to effectively purify the air-conditioned space, it is possible to obtain a refrigerating / air-conditioning apparatus capable of controlling the amount of generated ions.

Further, 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. Even if the absolute humidity changes, the amount of ions in the space also changes. To obtain a refrigerating / air-conditioning device capable of maintaining the microbial growth prevention / purification capacity of the air-conditioned space in a good state by controlling the temperature to a predetermined value.

Further, the amount of ozone generated is controlled within a predetermined range to suppress the disadvantages caused by ozone, and the synergistic effect of ozone and ions prevents the growth of microorganisms and further improves the purification effect of the air-conditioned space. It is to obtain an air conditioner.

Further, when the ozone decomposing chamber is composed of an ozone decomposing catalyst, a refrigerating / air-conditioning apparatus is obtained in which the life of the catalyst can be easily recognized.

By reducing the ozone concentration and supplying ions as well, a refrigeration / air-conditioning apparatus having a high ability to prevent the growth of microorganisms or to purify the air-conditioned space is obtained.

Further, a refrigerating / air-conditioning apparatus capable of supplying both ions and ozone can be supplied depending on the contents to prevent the growth of microorganisms and maintain the purification capacity of the air-conditioned space in a good condition. It is a thing.

Also, when a person does not work, ions and ozone are supplied, and while the person is working, only the ions or the ozone concentration can be lowered to prevent the growth of microorganisms and maintain the purification capacity of the air-conditioned space in a good state. The purpose is to obtain a refrigeration / air conditioning system.

Further, the refrigerating / air-conditioning apparatus which does not use unnecessary electric power is obtained by operating the microbial growth preventing apparatus in conjunction with the blower of the heat exchanger unit.

In addition, the temperature inside the refrigerator is detected and ions are supplied based on the temperature inside the refrigerator, and both ions and ozone can be supplied to prevent the growth of microorganisms and to purify the air-conditioned space. A refrigeration / air-conditioning device that can be maintained in a state.

Further, since a filter is provided on the upstream side of the microbial growth preventing device to enable dust collection, a refrigerating / air conditioning device which can maintain the microbial growth preventing / cleaning capacity of the air-conditioned space in a good state is obtained. Is.

[0017]

Refrigeration in the present invention
The air conditioner uses heat to exchange heat between the heat medium and the heat-exchanged air.
Exchanger and blower air to supply heat exchanged air to this heat exchanger
Located in the air duct that passes through the fan and the heat exchanger, and downstream of the blower
Is provided on the side to supply electrons to the passing air.
An ionization chamber that ionizes the gas in the air by
Microbiology with high voltage generator supplying pulsed voltage to chamber
And a material reproduction prevention device.

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

Further , the refrigerating / air-conditioning apparatus according to the present invention
Is a heat exchanger for exchanging heat between the heat medium and the heat exchanged air.
And a first blower for supplying heat exchanged air to this heat exchanger
Heat exchanger unit equipped with a
A second blower that takes in the air discharged from the
The ventilation passage through which the gas taken in by the blower passes, and its
Installed in the air passage to supply electrons to the passing air
By ionizing the gas in the air by
And a high-voltage generator that supplies pulsed voltage to the ionization chamber
And a device for preventing the reproduction of microorganisms.

Further, a signal indicating that the first blower is in operation or stopped
Control the operation and stop of the microbial growth prevention device
It is equipped with a start / stop control device.

Further, the ionization chamber is composed of a thin metal wire and a pair thereof .
The metal wire mesh or metal needle installed facing
It is composed of metal wire mesh installed facing.

Further , the pulse frequency of the high voltage generator can be changed.
Is provided with a pulse frequency converter.

Further, the pulse frequency of the pulse frequency converter
The pulse frequency control unit that controls the number and the timer function unit
The pulse frequency control is provided by a command from the timer function section.
This is the one that allows the control section to operate.

Further, in the refrigerator containing the heat exchanger
Ozone detection means for detecting the amount of ozone is provided to detect ozone.
When the ozone detection amount obtained by
The frequency control unit is operated.

Further, in the refrigerator containing the heat exchanger
An internal temperature detection unit that detects the temperature is installed to detect the internal temperature.
Based on the detection value obtained by the means, the pulse frequency control unit
The number is made variable.

Further, the upstream wind of the microbial growth prevention device
The filter according to claim 1, wherein a filter is provided in the road.
The refrigeration / air-conditioning apparatus according to any one of 9).

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 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, reference numeral 65 denotes a cooler as a heat exchanger, which heat-exchanges the refrigerant with the heat-exchanged air (in-chamber air in this embodiment). 67
Is a blower for supplying heat-exchanged air to the cooler 65, 67a is a blower blade, and 67b is the blower blade 67.
It is a drive motor for driving a. 68 is a fan cover provided with an air outlet, 66 is a drain pan for receiving and discharging condensed water generated in the cooler 65, 70 is the cooler 65, the blower 67, the fan cover 68, and the drain pan 6
6, a cooling unit composed of an outer box 75 and the like,
It is suspended on the ceiling portion 71a of the refrigerator 71 via a mounting plate 69. Reference numeral 22 is an air passage component that forms an air passage 22b that guides the air cooled by the cooler 65 to the ionization chamber 23 and the ozone decomposition chamber 28 described later. Reference numeral 2 is an electrode composed of a plurality of metal fine wires (for example, diameter is 0.2 mm or less) or metal needles, and 25 is a mesh shape (for example, about 10 mesh) arranged to face the metal needle (or metal fine wire) side electrode 2. The metal ground electrodes 4 and 4 are high voltage generators for applying 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. Reference numeral 24 denotes a bushing made of an insulating material, which is attached to the airflow path forming 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 out from the ozone decomposition chamber 28, which is air containing ionized gas that does not contain 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. A thin metal wire (for example, having a diameter of 0.2 mm or less) or a metal needle side electrode 2 in the ionization chamber 23, and a mesh-shaped (for example, about 10 mesh) metal ground electrode 25 arranged to face the electrode 2. Interval (gap length)
Is 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 and the oxygen molecules and the like are ionized, and the gas 1
Will contain 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 has a strong oxidizing power and is harmful when the ozone concentration exceeds a certain value, the gas 27 containing negative ions and ozone is introduced into 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. When ozone is decomposed by the ozone decomposition catalyst 28, oxygen of 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 where 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 demonstrating that the microorganisms can be suppressed from being propagated by the gas 30. A description of this experimental example will be given later).

Here, one embodiment carried out to demonstrate that the negative ions generated by 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 fine tungsten wire electrodes 2 of m are arranged at intervals of 20 mm, the gap length between the metal needle side 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 both electrodes is set to about 2 m / s, and the ozone decomposition chamber 28 is installed in the insulator 29 where the air passage 22 is made of an insulating material such as acrylic resin, and the temperature of the supplied air is 5 ℃,
Humidity is 95%.

As a result of generating negative ions under such conditions and measuring the ion concentration of the ionized gas 27 using an ion densitometer, the negative ion concentration at the outlet of the ionization chamber 23 is 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, it is possible to increase the amount of generated ions by further increasing the number of thin wires. 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 5k.
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, polyethylene,
The same effect was obtained by using an insulating material such as polyvinyl chloride, glass or quartz glass.

Next, an experimental example demonstrating that microorganisms can be prevented from propagating by the ionized gas 30 will be shown. The inside of the refrigerator 71 is cooled by the cooling unit 70 from 0 ° C to
It is cooled to about 5 ° C. When the blower 67 is operated in this state, the ozone-free negative ionized gas 30 is generated from the ozone decomposing chamber 28 as in the first embodiment. Therefore, the ozone-free negative ionized gas 30 is generated.
Is supplied to a storage space for food or the like in the refrigerator 71. As a result, the ion concentration in the refrigerator 71 gradually increases, but a part of the generated negative ions is consumed by coming into contact with the wall surface of the refrigerator 71, the cooler 65, etc., so that the negative ion concentration in the refrigerator 71 is almost the same. It is maintained at a 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, the experimental results show that when untreated (when negative ions and ozone are not supplied), the tuna sashimi begins to show a blackish color on the third day after the preservation, and the freshness decreases. 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 treated continuously in an ion atmosphere of an extremely low concentration 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 having a concentration of about 1 ppm, there was no rotten odor as in the case of the negative ion treatment, and the number of viable cells on the surface was also similar to that of 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 bacteria artificially planted in an agar medium instead of the food 8 (microorganisms collected from dust adhered to the fan of an 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 thus planted on the agar medium, the propagation of the bacteria 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 preventing 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 refrigeration / air-conditioning system 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 described above, the microbial growth prevention apparatus A is provided on the air outlet side of the cooling unit 70, but as shown in FIG. 10, an outer box having an air inlet 75a and an air outlet 75b and forming an air passage 22b. A cooler 65 and a blower 67 disposed in the 75
A microbial growth prevention device A is arranged between the two. This microbial growth prevention apparatus A has the same configuration as that of the first embodiment and includes an ionization chamber 23 and an ozone decomposition chamber 28.
In step 3, negative ions are generated, and in the ozone decomposition chamber 28, ozone mixed in the negative ions is decomposed and removed. 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. Reference numeral 66 is a drain pan for receiving condensed water generated in the cooler 65, and reference numeral 68 is a fan cover having an outlet corresponding to the blower blade 67a. 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 blades 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. When dust or the like enters the microbial growth prevention apparatus A, the amount of negative ions generated decreases, so the filter 80 shown in FIG.
As shown in 2, when the cooling device 65 is arranged on the upstream side of the air flow of the microbial growth prevention device A, the negative ion generation amount can be prevented from decreasing.

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

As shown in FIGS. 13 and 14, if the 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 the same as 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 comparing means for comparing the detected ion amount detected by the ion detecting means 90a with a preset supply ion target value (set by the setting device 92a), and 93 is based on the output signal from the comparing 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.
22, 22a, 23, 25, 28-31, 65-72,
67a and 71a are the same as those shown 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, 5
Reference numeral 2 is a calculation unit that calculates the absolute humidity from the temperature detection unit 50 and the humidity detection unit 51, and 93 is correction control so that the ion generation amount returns to a target value when the absolute humidity calculated by the calculation unit 52 changes. In this embodiment, the ion generation amount is controlled to a target value by correcting and controlling the rotational speed of the blower 67.

The amount of negative ions generated (pieces / sec) is
As shown in FIG. 18, it fluctuates according to the absolute humidity, and therefore, the ion concentration of the space for storing the microorganism-propagating 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 or the like in the first embodiment, FIGS. 20 (a), 20 (b) and 21 are shown.
As shown in (a) and (b), the ozone decomposition chamber 28 is constituted by a grid-shaped heating 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, The ozone may be thermally decomposed. Reference numeral 33 is a current supply unit for supplying or stopping the current to the grid-shaped heating resistor 32.

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 an electric current to the grid-shaped heating element 32 (generate only negative ions) and stop the electric 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-described embodiment, the configuration in which the current supply to the grid-shaped heating element 32 is controlled to be turned on and off has been shown, but 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. In the figure, 1, 2, 4, 22, 22a, 22
b, 23, 25, 27 and 30 are the same as those in the first embodiment shown in FIG. 1, and the description thereof will be omitted. 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 gas that has been decomposed in ozone 2
8 is sent. 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 denotes an air passage component member to which the ozone decomposition 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, upper and lower surfaces thereof 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 the detected amount of ozone is set to a predetermined value, for example, by the blower 67. Number of revolutions,
Alternatively, 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 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 ozone is more than that in the case of supplying only 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-mentioned 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 configuration is such that the rotation 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.

Example 9. FIG. 25 is a configuration diagram of the ninth embodiment. Example 9 is Example 1
From the microbial propagation prevention device A,
The microbial reproduction prevention apparatus A is provided with a second blower 73. FIG. 26 is a detailed view of the microbial propagation prevention apparatus A, and FIG. 27 is a configuration diagram of the ozone decomposition chamber 28.

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
It is taken in from the second blower 120 and is introduced into the ionization chamber 23 through the air passage 22b. The air blown from the blower 67 is taken in by the second blower 120 and is discharged, so that negative ions, which will be described later, are discharged in a good distribution in the refrigerator.

Other operations, effects, etc. are omitted because they are the same as in the first embodiment, but according to the present embodiment, by separately installing the microbial growth prevention apparatus A, there is also an effect that there is little variation in model selection. . That is, it is possible to combine the cooling unit 70 and the microbial growth prevention apparatus A separately as needed by combining the models.

As described in the first embodiment, the effect can be obtained sufficiently by using only negative ions. However, as shown in FIG. 28, when S. aureus contains only negative ions and ozone only,
Further, a test in which negative ions and ozone were combined was carried out. In this case, when the negative ions and ozone were combined, the survival rate of Staphylococcus aureus was 0, which was a good result. Therefore, as shown in FIG. 27, the grid-shaped heating element 32 is provided with a current supply unit 33 for supplying and stopping current, and the grid-shaped heating element 3 is provided.
When ozone passes through 2 to decompose ozone, only negative ions are generated, and when electricity 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 ozone and negative ions or to supply only negative ions, it is possible to obtain a cooling device that can perform control suitable for a contained item such as food.

Example 10. For example, in Example 9, a DC negative voltage was applied to the metal thin wire electrode 2, but as shown in FIG. 29, a pulse DC negative voltage having a commercial frequency or higher was applied. The tenth embodiment is provided with the pulse frequency converter 121 that makes the pulse frequency variable.

Next, the operation will be described. FIG. 30 shows the effect of the pulse frequency on the negative ion generation amount and the ozone generation amount. The negative ion generation amount increases as the pulse frequency increases, but when the wind speed between both electrodes is about 0.9 m / s, the negative ion generation amount becomes maximum at a pulse frequency of 300 Hz, and then the pulse frequency increases. As a result, the tendency was to decrease. On the other hand, the amount of ozone generated tended to increase monotonically in proportion as the pulse frequency increased. In this way, as a result of examining the pulse frequency characteristics for negative ion and ozone generation,
The amount of ozone generated increases as the pulse frequency increases. On the other hand, it was confirmed that the amount of negative ions generated increased as the pulse frequency increased and reached a maximum value near 300 Hz. Therefore, the pulse frequency converter 12
By changing the pulse frequency of the high-pressure generator 4 with 1 and changing the amounts of ozone and negative ions generated, a controllable cooling device suitable for the contents can be obtained.

Further, when a timer function section (not shown) is provided in the grid-shaped heating element 32 of the ninth embodiment and a command is issued to the current supply section 33 by a signal from the timer function section, the same as described in the sixth embodiment. There are various actions and effects.

Further, a timer function unit (not shown) is provided in the tenth embodiment, and a command is issued to the pulse frequency converter 121 by a signal from the timer function unit. By changing the pulse frequency according to the command, it is possible to change the ratio of negative ions and ozone to obtain a controllable cooling apparatus suitable for the time zone or suitable for the contents.

Example 11. As shown in FIG. 31, a start / stop control device 122 is provided which receives a start / stop signal of the blower 67 of the cooling unit 70 and controls the operation and stop of the microbial growth prevention apparatus A. Then, when the blower 67 of the cooling unit 70 is stopped (during defrosting or during thermostatting), the microbial growth prevention apparatus A is stopped. By doing so, when the blower 67 of the cooling unit 70 is not operating, the air in the refrigerator does not move, and thus negative ions cannot be carried well. In this case, stop the microbial growth prevention device A. , It is possible to prevent useless power consumption.

Example 12 As shown in FIG. 32, the inside temperature detecting device 123 for detecting the temperature inside the refrigerator in which the cooling unit 70 is housed is provided, and the current is supplied to the grid-shaped heating elements 32 based on the detection value of the inside temperature detecting device 123. Current supply unit 33 for controlling
The pulse frequency converter 121 that makes the frequency of the power supply pulse of the high voltage generator 4 variable is operated. Then, as shown in FIG. 33, when the temperature inside the refrigerator is high (for example, 20 ° C.), the antibacterial effect of the negative ions decreases, so that the ratio of the negative ions to ozone is changed according to the temperature inside the refrigerator. A controllable cooling device can be obtained.

Example 13 When dust or the like enters the microbial growth prevention apparatus A, the amount of negative ions generated decreases, so the filter 80 shown in FIG.
As shown in FIG. 4, when it is arranged at the air inlet side of the second blower 120 on the air inflow side of the microbial growth prevention apparatus A, the negative ion generation amount can be prevented from decreasing. That is, this embodiment has the same operation and effect as the third embodiment. Furthermore, since the cooling unit 70 and the microbial growth prevention apparatus A are separately installed, the dust in the refrigerator is collected by negative ions. Therefore, if the collected dust is captured by the filter 80, the dust in the refrigerator can be collected. Since it can be reduced, the cleanliness of the refrigerator can be maintained.

Example 14. FIG. 35 shows Example 14. Like the eighth embodiment, the fourteenth embodiment has an ozone detecting means 61 for detecting the amount of ozone contained in the air.
Alternatively, the pulse frequency converter 121 operates to keep the ozone amount below a predetermined value.

As described above, by supplying 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 ozone is more than that in the case of supplying only ions alone. More effectively suppress the growth of microorganisms, or more effectively clean the air-conditioned space, corrosion of equipment constituting the device,
The influence on the human body can be eliminated.

Example 15 In FIG. 36, a blowout guide 124 capable of switching between two directions is provided in the downstream air passage of the microbial growth prevention apparatus A, and negative ions are blown out in the B direction in the figure and ozone is blown out in the C direction in the figure. Since it is more effective to directly apply the negative ions to the contents, the negative ions are blown out in the B direction, and the ozone causes the contents to be discolored. Therefore, the negative ions are blown out in the C direction so as not to directly hit the contents. By doing so, it is possible to more effectively suppress the growth of microorganisms, or to more effectively clean the air-conditioned space, and to eliminate the corrosion of the equipment constituting the device and the effects on the human body. .

[0087]

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. Further, since the heat exchange blower can share the blower for the microbial growth prevention device, it is possible to obtain the refrigeration / air-conditioning device which is inexpensive and has a high microbial growth prevention ability.

Further, 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 the electrons with respect 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.

Further, by providing the filter in the upstream air passage of the microbial growth preventing apparatus, it is possible to prevent dust and the like from entering the microbial growth preventing apparatus and prevent the reduction of ion generation amount.

Ion detecting means for detecting the amount of ions generated from the microbial growth prevention device, and comparing means for comparing the detected ion amount detected by the ion detecting 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 required 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.

Further, the ion generation amount control means can control the ion generation amount by controlling the number of revolutions of the blower, and can produce the same effect as described 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 the temperature in the space for storing the object in which the microorganisms propagate or the air-conditioned space, and a humidity detecting means for detecting the 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 composed of 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 composed of a heating resistor, and a supply current control unit for controlling the supply of current to the heating resistor is provided, so that the mixing ratio of the amount of ions and the amount of ozone is changed and supplied. Therefore, it is possible to prevent the microbial growth by supplying a mixed gas in the most suitable ratio according to the type of stored microbial propagation material and the degree of demand of the conditioned space, or to clean the conditioned space. Can be done. Also, it is possible to supply a mixed gas of ions and ozone, or only ions, depending on the time of day.
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 made of a transparent member or a mesh member, it is possible to easily know the life due to discoloration or the like, and to know the catalyst replacement time. You can

Further, by making the air duct constituent member having the ozone decomposing chamber attached thereto 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 constructing the air passage component having the ozone decomposing chamber as 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. 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 having an ionization chamber that ionizes 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 the 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 air-conditioned space more than when supplying ions and ozone of a predetermined low concentration to the air-conditioned space. Ri can be effectively cleaned.

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 first blower for supplying the heat-exchanged air to the heat exchanger are provided. A heat exchanger unit provided, and a second blower for taking in the air discharged from the heat exchanger unit,
A ventilation path through which the gas taken in by the second blower passes, an ionization chamber that is installed in the ventilation path, and ionizes the gas in the air by ionizing electrons to the passing air, and the wind. Since it is provided with a microbial growth prevention device that is electrically insulated from the path and is composed of an ozone decomposition chamber that decomposes and removes ozone contained in the gas ionized in the ionization chamber, The air blown out from the first blower is taken in by the second blower of the microbial growth prevention device and discharged. Therefore, since the negative ions are distributed in the refrigerator along the air flow discharged by the first blower, the growth of microorganisms can be efficiently suppressed.

Further, since the ozone decomposing chamber is composed of a heating resistor covered with an electrically insulating material and provided with a supply current control section for controlling the supply of current to the heating resistor, the ozone decomposing chamber passes through the grid-like heating element. Then, when ozone is decomposed, only negative ions are generated, and when electricity 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 ozone and negative ions or to supply only negative ions, it is possible to obtain a cooling device that can perform control suitable for a contained item such as food.

A heat exchanger unit having a heat exchanger for exchanging heat between the heat medium and the heat exchanged air, and a first blower for supplying the heat exchanged air to the heat exchanger; A second blower that takes in the air discharged from the exchanger unit, a ventilation path through which the gas taken in by the second blower passes, and a ventilation path that is installed in the ventilation path and ionizes electrons to the passing air. By using a pulse for the ionization chamber that ionizes the gas in the air and the power source of the high-voltage generator located in the ionization chamber, and a pulse frequency converter that makes the pulse frequency variable Since the apparatus is provided, it is possible to change the ozone amount and the negative ion amount without providing the ozone decomposition chamber. Therefore, it is possible to obtain a cooling device that is inexpensive and can be controlled appropriately for the contents.

Further, since the supply current control section for controlling the supply of the current to the heating resistor and the timer function section are provided, and the supply current control section is operated by the command from the timer function section, Electric current can be supplied to the grid-shaped heating element (only negative ions are generated) and current can be stopped (ozone and negative ions are generated) by a signal from the timer function part, so ozone and negative ions are generated at night when there are no people. (The higher the ozone concentration, the higher the sterilizing power), and since it is possible to generate only negative ions when people are present, such as during the daytime, a cooling device that can be controlled according to the time of day or that is suitable for the contents Obtainable.

Further, a pulse is used for the power source of the high voltage generator located in the ionization chamber, a pulse frequency converter for varying the pulse frequency, and a timer function section are provided, and the above-mentioned command is issued from the timer function section to make Since the pulse frequency converter is made to operate, it is possible to obtain a controllable cooling device that can be controlled according to the time zone or controlled by changing the ratio of negative ions and ozone.

Further, since the start / stop control device for controlling the operation / stop of the microbial growth prevention device in response to the operation / stop signal of the first blower is provided, the first fan of the heat exchanger unit is operated. When not, the microbial growth prevention device was stopped. In other words, at this time, the air in the refrigerator does not move, and the negative ions cannot be carried well, so it is possible to stop the microbial growth prevention device and use unnecessary power.

Also, when the temperature inside the refrigerator is high (for example, 2
(0 ° C.), the antibacterial effect of negative ions decreases, so if the ratio of negative ions and ozone is changed according to the internal temperature,
It is possible to obtain a controllable cooling device suitable for the temperature inside the refrigerator.

Further, since the filter is arranged in the air passage on the upstream side of the microbial growth preventing apparatus, it is possible to prevent the decrease of the amount of negative ions generated by dust. Further, since the dust in the refrigerator is collected by the negative ions, if the collected dust is captured by the filter, the dust in the refrigerator can be reduced. Therefore, the cleanliness of the refrigerator can be maintained.

Further, by suppressing the amount of ozone to a predetermined value or less, it is possible to prevent the influence on the human body, the corrosion of the equipment constituting the apparatus, and the discoloration of the contents.

Further, since a blowout guide capable of switching in two directions is provided in the air passage on the downstream side of the microbial growth prevention device, negative ions are blown out in the direction of the contained object (it is more effective if the negative ions are directly applied to the contained object). ) Ozone discolors the contents, so
Blow it out so that it does not hit the contents directly. In this way, the reproduction of microorganisms can be suppressed more effectively.

[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 shows the wind speed [cm / sec] supplied to the ionization chamber,
It is a characteristic diagram which shows the relationship with the amount of negative ions generated [pieces / sec].

FIG. 5 is a table showing experimental results demonstrating that ions suppress the growth of microorganisms.

FIG. 6 is a table showing the experimental results demonstrating that ions suppress the growth of bacteria.

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

FIG. 8 is still another refrigeration system according to Embodiment 1 of the present invention.
It is sectional drawing of an air conditioner.

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

FIG. 10 is a configuration diagram of a refrigerating / 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 a configuration diagram of still another refrigerating / air-conditioning apparatus according to Embodiment 3 of the present invention.

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 refrigerating / 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. Figure 20
(B) is the heating element.

FIG. 21 (a) is another refrigeration system according to the sixth embodiment.
It is a block diagram of the microbial growth prevention apparatus of an air conditioner. Figure 21
(B) is a heating element control block diagram.

FIG. 22 (a) is a configuration diagram of a refrigerating / air-conditioning apparatus according to the 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 of a refrigerating / air-conditioning apparatus according to Embodiment 9 of the present invention.

FIG. 26 is a detailed view of another microorganism breeding prevention apparatus for a refrigerating / air-conditioning apparatus according to Embodiment 9 of the present invention.

FIG. 27 (a) is a configuration diagram of a microbial growth prevention apparatus according to a ninth embodiment. FIG. 27B shows the heating element.

FIG. 28 is a table showing experimental results for Staphylococcus aureus with ozone, negative ions, and ozone + negative ions.

[Fig. 29] Fig. 29 is a configuration diagram of a microbial growth prevention apparatus according to Embodiment 10 of the present invention.

FIG. 30 is a characteristic diagram showing the relationship between the pulse frequency and the amount of negative ions and ozone generated.

FIG. 31 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 11 of the present invention.

FIG. 32 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 12 of the present invention.

FIG. 33 is a table showing the experimental results of the antibacterial effect of negative ions depending on temperature.

FIG. 34 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 13 of the present invention.

FIG. 35 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 14 of the present invention.

FIG. 36 is a configuration diagram of a refrigerating / air-conditioning apparatus according to Embodiment 15 of the present invention.

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

FIG. 38 is a block diagram showing a conventional cooling device.

[Explanation of symbols]

22b air passage, 23 ionization chamber, 28 ozone decomposition chamber, 3
2 heating element, 34 supply current control section, 35 air duct constituent member, 50 temperature detecting means, 51 humidity detecting means, 52
Calculation part, 61 Ozone detection means, 62 Ozone generation amount control means, 65 Heat exchanger, 67 Blower, 67a Blower blade, A, B Microbial breeding prevention device, 75 Outer box, 75
a air inlet part, 75b air outlet part, 80 filter, 90a ion detection means, 92 comparison means, 93
Ion generation amount control means, 120 Second blower, 12
1 pulse frequency converter, 122 start / stop control device, 12
3 Internal temperature detection device, 124 blowout guide.

Front Page Continuation (72) Inventor Yasuhiro Tanimura 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Koji Ota 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (56) References JP-A-6-82151 (JP, A) JP-A-5-277336 (JP, A) JP-A-1-266483 (JP, A) JP-A-6-82150 (JP, A) Kaihei 5-176732 (JP, A) Actual Kaihei 5-86349 (JP, U) Actual Kaisho 60-140890 (JP, U) Actual Kaihei 3-87184 (JP, U) Actual Kohei 1-17022 ( JP, Y2) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F24F 1/00 F25D 23/00 302

Claims (10)

(57) [Claims] 1. 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 an air passage passing through the heat exchanger, and It is installed on the downstream side of the blower and supplies electrons to the passing air.
By ionizing the gas in the air by
And a high voltage generator that supplies a pulsed voltage to the ionization chamber.
And a microbial reproduction prevention device having the same.
Refrigeration and air conditioning equipment. 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. A heat medium and heat-exchanged air are heat-exchanged.
The heat exchanger and the heat exchange air to be supplied to this heat exchanger
And a heat exchanger unit having a blower of 1.
Second blower that takes in the air discharged from the air conditioning unit
And the gas taken in by the second blower passes through
Ventilation passages and the air passing through the ventilation passages installed in the ventilation passages.
By supplying electrons to the gas in the air,
Supply of pulsed voltage to the ionization chamber and the ionization chamber
With a high-pressure generator
A refrigeration / air-conditioning system characterized by that. 4. A signal for operating and stopping the first blower is received.
Start / stop system that controls the operation and stop of the microbial growth prevention device
A refrigeration system according to claim 3, further comprising a control device.
Air conditioner. 5. The ionization chamber is provided with a thin metal wire and a metal wire facing it.
Placed metal wire mesh or metal needle and
Claims, characterized in that they consist of metal wire mesh placed
The refrigeration / air-conditioning apparatus according to any one of Items 1 to 4. 6. The pulse frequency of the high voltage generator is made variable.
A pulse frequency converter is provided, and the pulse frequency converter is provided.
5. The refrigerating / air-conditioning apparatus according to any one of 5 to 5. 7. A pulse frequency converter for controlling a pulse frequency.
A pulse frequency control unit to control and a timer function unit,
According to the command from the timer function unit, the pulse frequency
The cooling unit according to claim 6, wherein the control unit operates.
Freezing / air conditioning system . 8. Ozone in a refrigerator containing a heat exchanger.
The ozone detection means for detecting the
If the ozone detection amount obtained in the step exceeds a specified value, the pulse
The wave number control unit is operated, according to claim 7.
The refrigeration and air-conditioning system installed. 9. The temperature in a refrigerator containing a heat exchanger
The inside temperature detecting means for detecting the inside temperature is provided.
Based on the detection value obtained at the stage, the pulse frequency control unit
9. The method according to claim 7 or 8, characterized in that
Refrigeration and air conditioning equipment. 10. An air passage upstream of the microbial growth prevention device
The filter according to claim 1, further comprising a filter.
The refrigeration / air-conditioning device according to any one.