JP2000346538A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system in which it can provide an excellent sterilization action when it is used as a food sterilization apparatus, and oxidization action for substances constituting the apparatus is reduced to the utmost. SOLUTION: An air conditioning system includes a negative ion/ozone generator K for generating negative ion and ozone, two photoelectric sensors 24, an input apparatus 17 for setting and inputting starting, interruption, and output adjustment of the negative ion/ozone generator K, a controller 18 for controlling the negative ion/ozone generator K, a fine current detector 19 for detecting a fine current generated from the negative ion/ozone generator K, an arithmetic operation apparatus for judging an operation state of an instrument based upon a fine current detected by the fine current detector 19, and an abnormal electric discharge display apparatus 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system, and more particularly, to a high voltage applying device for applying a negative high voltage pulse to an electrode portion comprising a thin metal wire electrode and a conductive mesh. The present invention also relates to an air conditioning system having a blower for sending a mixed gas of predetermined negative ions generated at an electrode section and ozone having a predetermined concentration into a warehouse.

[0002]

2. Description of the Related Art Conventionally, air conditioning systems have been used to control and prevent the denaturation of foods by the proliferation of microorganisms by sterilization or the like. As an air conditioning system used for such a purpose, for example, Utility Model Registration No. 3001
There is an ozone generator described in Japanese Patent No. 874. This ozone generator is configured to apply +3 kV to +3 kV to an electrode portion made of a sintered metal coated with a nitrogen trap and alumina.
A high frequency high voltage of 4 kHz, 24 kHz to 36 kHz is applied, and ozone is generated by plasma resonance. When this ozone generator is used as an air conditioning system in a food sterilization apparatus, the ozone generator has an ambient ozone concentration of food to be sterilized of 0.0%.
It is adjusted and used to generate any concentration of ozone within the range of 1 ppm to 1.0 ppm. The sterilization of microorganisms that occur in foods is performed by utilizing the strong oxidizing action of the generated ozone.

[0003]

However, since it has been pointed out that ozone may have an adverse effect on human health when its concentration in the air exceeds 0.1 ppm, for example, according to occupational safety and health standards, It is specified that the concentration of ozone in air should be kept below 0.1 ppm so as not to adversely affect human health. For this reason, even in the conventional ozone generator used as an air conditioning system in the aforementioned food sterilizer, the air concentration of the generated ozone is 0.1 p.
pm is set.

However, when the air concentration of ozone is set to 0.1 ppm or less, there are bacteria, molds, etc. which cannot be sterilized at this air concentration, so that the above-mentioned ozone generator is used as an air conditioning system in a food sterilizer. However, there was a problem because a sufficient bactericidal effect was not obtained.

[0005] Further, since ozone gas causes an oxidizing effect of a substance around the ozone gas, if the above-mentioned conventional ozone generator is used in an air conditioning system, a specific element which is not oxidized by ozone such as stainless steel is used. However, there is a problem in that a portion other than the metal has a deterioration effect due to oxidation.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sufficient sterilizing effect when used as a food sterilizing apparatus, for example. An object of the present invention is to provide an air-conditioning system in which an oxidizing effect is reduced as much as possible.

[0007]

In order to achieve the above object, in the air conditioning system according to the first aspect of the present invention,
For example, an air conditioning system installed at a predetermined position in a warehouse for storing foods and the like, wherein at least a negative ion / ozone generator that generates negative ions and ozone and the presence or absence of an object in the warehouse are identified. And at least two or more photoelectric sensors that output the identification result as a detection signal, and a control device that controls, stops, or starts operation of the negative ion / ozone generator according to the detection signal.
The negative ions / negative ions provided in the ozone generator /
A minute current detecting device for detecting a minute current generated from a negative ion / ozone generating portion grounding electrode which is a grounding side electrode of a portion generating ozone; and a minute current value detected by the minute current detecting device. And an arithmetic unit for determining an operation state.

[0008] In the air conditioning system according to the second aspect of the present invention, in the air conditioning system according to the first aspect,
A negative voltage value / pulse frequency detecting device for detecting a negative voltage value and a pulse frequency of a negative pulse high voltage in the negative ion / ozone generating electrode unit; and a negative voltage value detected by the negative voltage / pulse frequency detecting device. Negative voltage target value and pulse frequency target value of the negative pulse high voltage preset in correspondence with the negative voltage value and pulse frequency of the pulse high voltage and the air volume blown out from the negative ion / ozone generator And an emergency control device for stopping the operation of the negative ion / ozone generator based on an output signal from the comparing means and displaying an abnormal operation state. Features.

In the air conditioning system according to a third aspect of the present invention, in the air conditioning system according to the first or second aspect, the minute current value detected by the minute current detecting device is set in advance. And an intermittent control device for intermittently operating the device based on the result of comparison with the given small current value.

The air conditioning system according to a fourth aspect of the present invention is the air conditioning system according to any one of the first to third aspects, wherein the air conditioning system further reduces the ozone concentration. An ozone concentration sensor for detecting, and a humidifier installed at a predetermined position in the warehouse and adjusting the humidity in the warehouse, the ozone concentration detected from the ozone concentration sensor is preset. A humidifier controller that activates the humidifier when the predetermined value is exceeded.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiment shown here is merely an example, and is not necessarily limited to this embodiment. Further, in the following embodiments, a case is described in which the air-conditioning system according to the present invention is used, for example, in a warehouse that stores foods and the like, but the method of using the air-conditioning system according to the present invention is not limited thereto. We refuse in advance that it is not a thing.

Embodiment 1 First, an air conditioning system A according to the present invention will be described as a first embodiment with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating a configuration of the air conditioning system A. As shown in FIG. 1, the air conditioning system A is installed at a predetermined position in a warehouse S that stores food 31.

The air conditioning system A sets and inputs a negative ion / ozone generator K for generating negative ions and ozone, a photoelectric sensor 24, and start, stop, and output adjustment of the negative ion / ozone generator K. The input device 17, the control device 18 for controlling the negative ion / ozone generating device K, the small current detecting device 19 for detecting a small current generated from the negative ion / ozone generating device K, and the detection by the small current detecting device 19. An arithmetic unit 21 that determines the operating state of the device based on the minute current value and an abnormal discharge display unit 29 are provided.

Although two negative ion / ozone generators K are installed inside the warehouse S here, the number is not limited to this. In addition, photoelectric sensor 2
4 is connected to two negative ion / ozone generators K. For example, one negative ion / ozone generator is connected to one photoelectric sensor 24.
It is also conceivable that the ozone generator K is connected. Further, although the case where the air conditioning system A according to the present embodiment is used in the warehouse S that stores the food 31 is described here, the use is not limited to only the food storage.

Next, the operation of each member constituting the above-described air conditioning system A will be described. The photoelectric sensor 24 is
A laser output unit 24a for irradiating a laser, and a light receiving unit 24b for receiving a reflected wave reflected on an object,
The distance of the object is detected using the irradiation laser light and the reflected laser light. With the photoelectric sensor 24 configured as described above,
The distance between the negative ion / ozone generator K and the food 31 is measured. The measurement result is input to the comparison determination means 26.

On the other hand, the reachable distance of the negative ions and ozone generated by the negative ion / ozone generator K is input to the comparison determination means 26 in advance, and this value is compared with the previous measurement result. Then, based on the comparison determination result, the object to be irradiated with negative ions and ozone, here, the food 31,
When it is located farther than the reachable distance of the negative ions and ozone, the comparison determination means 26 outputs an instruction signal to stop the operation of the negative ion / ozone generator K. In the case of FIG. 1, depending on the result of the comparison and determination, it is conceivable to stop one of the negative ion / ozone generators K or stop both the negative ion / ozone generators K.

The input device 17 sets start, stop, and output adjustment of the negative ion / ozone generator K. The control device 18 responds to a signal input corresponding to start, stop, or output control from the input device 17. And outputs a signal to the negative ion / ozone generator K.

The minute current detecting device 19 detects a minute current derived from corona discharge induced when a negative high voltage pulse is applied to the fine metal wire electrode 2 constituting the negative ion / ozone generating device K described later. And outputs a signal corresponding to the minute current value. Here, the minute current is 1 μA.
To several hundred μA, but the value differs depending on the electrode shape.

Based on the signal output from the microcurrent detector 19, the arithmetic unit 21 determines whether or not the state of corona discharge in the negative ion / ozone generator K is appropriate, that is, whether or not there is a transition from corona discharge to spark discharge. Then, based on the determination result, a signal corresponding to the reduction of each value of the applied voltage pulse frequency and the applied voltage is output to the negative ion / ozone generator K.

The abnormal discharge display device 29 is provided with the arithmetic unit 2
When 1 detects a discharge abnormality, the negative ion / ozone generator K that has caused the discharge abnormality sends a signal indicating that the discharge abnormality has occurred via the negative ion / ozone generator K and the controller 18. To indicate that a discharge abnormality has occurred.

Next, the structure of the negative ion / ozone generator K will be described with reference to the drawings. The negative ion / ozone generator K is, as shown in FIG. Body 1, fine metal wire electrode 2, grounded conductive mesh 3, and conductive spring 4 having acid resistance
, Insulator 6, blower 7, fixture 9, dustproof filter 11, metal catalyst 12, high voltage application device 13
And a sending direction control device 14 and a controller 16.

Each of these members will be further described. The metal fine wire electrode 2 has an air concentration of negative ions of 1.0E + 8 / cm, when a negative pulse high voltage is applied, using air or oxygen inside the warehouse S after dust removal processing as a raw material.
^The negative ions having a concentration of ³ and ozone having an air concentration of 0.1 ppm or less are simultaneously generated in the raw material air, and are desirably formed of thin metal wires having a diameter of 0.5 mm or less.

The conductive mesh 3 constitutes an electrode for inducing a corona discharge together with the thin metal wire electrode 2 when a negative pulse high voltage is applied to the thin metal wire electrode 2. The mesh size is desirably 1 mm or more and 20 mm or less.
Then, the thin metal wire electrode 2 and the conductive mesh 3 are paired to form a negative ion / ozone generating electrode portion G.

The spring 4 absorbs expansion and contraction of the thin metal wire generated when a negative pulse high voltage is applied to the thin metal wire electrode 2 to generate negative ions and ozone. The insulator 6 fixes the spring 5 inside the housing 2. The blower 7 sends out negative ions and ozone generated when a negative pulse high voltage is applied to the thin metal wire electrode 3 to the outside of the housing 1, and converts the raw material air, that is, the air inside the warehouse S into negative ion / ozone generating electrodes. Supply to section G.

The fixing bracket 9 fixes the blower 7 inside the housing 1. The dustproof filter 11 removes dust and the like from the raw material air. The metal catalyst 12 decomposes ozone contained in the raw material air sent to the negative ion / ozone generating electrode unit G into oxygen.

The high voltage application device 13 is a thin metal wire electrode 2
, A pulse frequency f satisfying 0.1 (kHz) ≦ f ≦ 5 (kHz) and a voltage E satisfying −13 (kV) ≦ E ≦ −3 (kV). The delivery direction control device 14 controls the negative ion /
It controls the direction in which negative ions and ozone generated when a negative pulse high voltage is applied to the ozone generation electrode section G are sent out. The controller 16 performs activation, stop, output control, and the like of the blower 7, the high-voltage applying device 13, and the sending direction control device 14.

Next, the operation of the air-conditioning system A according to the present embodiment using the negative ion / ozone generator K configured as described above will be described with reference to the drawings.
FIG. 2 is a control block diagram showing the control of the air conditioning system A. In the figure, the portion inside the dashed line is a portion relating to the negative ion / ozone generator K.

FIG. 3 is a control flow chart showing the operation sequence of each device in the air conditioning system A. Here the warehouse S
The case where the food 31 exists inside will be described. still,
The filling ratio of the food 31 in the warehouse S is assumed to be 60%, and this value is a standard value.

First, the negative ion / ozone generator K, whose value, that is, a predetermined air concentration value, is set by the input device 17 so that the food 31 is irradiated with negative ions and ozone of a predetermined air concentration. Are installed in the warehouse S. However, the blowing wind speed of the blower 7 and the high voltage applying device 13
FIG. 4 shows the correlation between the applied voltage amount of the negative pulse high voltage and the physical quantity of the pulse frequency, and the corresponding negative ion gas and ozone generation concentrations.

Here, when a start signal is input to the input device 17 as shown in FIG. 2, the start signal is output to the controller 16 via the control device 18.

The controller 16 outputs a start signal of the blower 7, the high-voltage applying device 13, and the sending direction control device 14 based on the start signal. Based on this signal, the blower 7, the high-voltage applying device 13, and the sending direction control device 14 start operating.

Next, the negative ion / ozone generating electrode section G
A negative pulse high voltage comprising a pulse frequency f satisfying 0.1 (kHz) ≦ f ≦ 5 (kHz) and an applied voltage E applying a voltage E satisfying −13 (kV) ≦ E ≦ −3 (kV) Is applied, a corona discharge is induced, and a few μm
A to several hundred mA DC current is generated, and flows as a discharge current i to the conductive mesh. Here, the interval between the negative ion / ozone generating electrode portion G is set to 5 mm, but is not necessarily limited to this value.

The discharge current i is detected by the minute current detector 19, and a signal based on a physical quantity corresponding to the detected current value, for example, a linear output of a voltage of 0 (V) to 5 (V) is compared. It is output to the judgment means 26.

In the comparing and judging means 26, the value of the discharge current i detected by the minute current detecting device is, for example, the lower limit i1 (μ
A), it is determined whether or not an allowable discharge current value i1 ≦ i ≦ i2 stored in advance with an upper limit of i2 (μA) is satisfied.
If i1 or i2 <i, the arithmetic unit 21 outputs a signal for instructing the controller 16 to stop the blower 7, the high-voltage applying device 13, and the sending direction control device 14, and the abnormal discharge display device 29 outputs abnormal discharge. Outputs a signal instructing display.

When the discharge current i satisfies i1 ≦ 1 ≦ i2, the blower 7 and the delivery direction control device 14 are sequentially operated to generate a predetermined concentration of negative ions and ozone in the air.
The food 31 is irradiated in the form of a mixed gas.

Next, the photoelectric sensor 24 irradiates the food 31 arranged in the warehouse S with laser light and measures the time required for the reflected wave to reach the photoelectric sensor 24, and calculates the arithmetic expression L stored in advance. = (C × T) / 2 (C: laser moving speed, T: time required for reflection, L: distance), the distance Z (m) between the casing 1 of the negative ion / ozone generator K and the food 31 is detected. I do. Then, a signal corresponding to this physical quantity is output to the comparison determination means 26.

The comparison / determination means 26 makes a comparison / determination of the physical quantity detected by the photoelectric sensor 24 with a preset physical quantity Z ₁ (m) (here, a distance capable of maintaining a predetermined negative ion + ozone concentration). Note that Z ₁ (m) is a distance that can maintain a predetermined negative ion concentration and ozone concentration.

When Z> Z ₁ is satisfied, an operation stop signal of the negative ion / ozone generator K is output to the controller 16, and a negative ion display device 29 is sent to the abnormal discharge display device 29 via the control device 18. / Outputs a stop display signal of the ozone generator K.

The ozone concentration shows such a concentration distribution that the concentration becomes uniform in the warehouse due to the concentration gradient. On the other hand, as shown in FIG. 5, the correlation between the negative ion concentration and the distance from the outlet decreases as the distance increases. When the food 31 is disposed close to the photoelectric sensor 24 (Z ₁ > Z), the operation of the negative ion / ozone generator K is restarted.

By performing such control, it is possible to always maintain the concentration of negative ions and ozone in the air only in the necessary area, and to maintain the air concentration of the predetermined negative ions and ozone only in unnecessary portions. Since there is no need to maintain the concentration, efficient operation is possible.

Since the air conditioning system A is configured as described above, for example, by irradiating a mixed gas of a negative ion gas and a low-concentration ozone gas to a food subject to the prevention of decay and denaturation, the health of the human body or peripheral devices can be improved. It can suppress the growth of living bacteria and mold on the surface of the food without adverse effects, and can prevent spoilage and denaturation of the food. In addition, inefficient irradiation of the negative ion concentration and the ozone concentration can be prevented.

Embodiment 2 In the second embodiment, in the air conditioning system A shown in the first embodiment, the negative voltage value of the negative pulse high voltage at the negative ion / ozone generation electrode unit F and the negative voltage for detecting the pulse frequency are detected. A voltage value / pulse frequency detector, a negative voltage value of a negative pulse high voltage detected by the negative voltage value / pulse frequency detector, a pulse frequency, and a negative ion / ozone generator K
A comparison device that compares a negative voltage target value of the negative pulse high voltage and a pulse frequency target value, which is set in advance in accordance with the air volume blown out of the compressor, and a negative ion based on an output signal from the comparison unit. / The result of comparing the emergency control device which stops the operation of the ozone generation device K and displays the abnormal operation state and the minute current value detected by the minute current detecting device 19 with an arbitrary preset small current value An air conditioning system B including an intermittent control device for intermittently operating the negative ion / ozone generator K will be described with reference to the drawings.

FIG. 6 is a schematic configuration diagram showing the configuration of the air conditioning system B. In this air conditioning system B,
The same members as those of the air conditioning system A described above are denoted by the same reference numerals, and description thereof will be omitted.

The air conditioning system B is provided with an output computing device 25 and a computed value comparing / determining means 27 in place of the comparing / determining means 26 in addition to the air conditioning system A.

The output arithmetic unit 25 has a voltage value and a pulse frequency output to the high-voltage applying device 13 based on the values of the irradiation negative ion concentration and the irradiation ozone concentration set by the input device 17. Calculates the wind speed to be output.

The calculated value comparing and judging means 27 converts each value calculated by the output calculating device 25 into a physical quantity,
That is, it is determined whether or not the preset negative voltage target value of the negative pulse high voltage and the pulse frequency target value are equal to or less than the preset target value corresponding to the air volume blown out from the negative ion / ozone generator K.

Next, the operation of the air conditioning system B will be described.
I will tell. FIG. 7 shows a control block for the air conditioning system B.
FIG. 8 is a control flow diagram. First, the input device 17
And the negative ion air concentration C irradiated to the food 31_NlPieces / cm
^Three(1 × 10^FourPieces / cm^Three~ 1 × 10⁷Pieces / cm^Three) And e
Zon Air Concentration C₀₁ppm (0.01-0.1 ppm)
input. However, these air concentration errors are set in advance.
Have been.

Next, based on the inputted negative voltage target value of the negative pulse high voltage and the signal corresponding to the pulse frequency target value, the blowing air volume Qm ³ / min to be sent from the negative ion / ozone generator K is determined. The calculation is performed by the output calculation device 25. Further, a negative pulse voltage V which is a negative voltage value of a negative pulse high voltage at the negative ion / ozone generating electrode portion F.
v and the pulse frequency fHz are calculated by the output calculation device 25. Then, these calculation results are input to the calculation value comparison determination means 27. Note that these actual values are detected by a negative voltage value / pulse frequency detection device (not shown).

Next, the operation result input to the operation value comparison / judgment means 27 is larger than the maximum air volume Q _MAX , the maximum applied voltage V _MAX , and the maximum pulse frequency f _MAX input in advance to the operation value comparison / judgment means 27. Whether the value is large or small,
Here, the comparison is performed by a comparison device (not shown).

When Q ≦ Q _MAX , V ≦ V _MAX , f ≦ f _MAX , the results of these calculations are output to the controller 16 of the negative ion / ozone generator K via the controller 18. .

When Q ≦ Q _MAX , V ≦ V _MAX , and f ≦ f _MAX are not satisfied, a signal corresponding to the error display is output to the input device 17. A signal corresponding to this error display allows an emergency control device (not shown) to display a negative ion /
The operation of the ozone generator K is stopped, and an abnormal operation state is displayed.

Based on the control signal output from the output operation device 25, the controller 16 installed in each negative ion / ozone generator K outputs an operation signal and an output control signal to the blower 7 and the high voltage applying device 13. .

When the blower 7 and the high-voltage applying device 13 operate, the minute current detecting device 19 detects a corona discharge current generated between the fine metal wire electrode 2 and the conductive mesh 3.

[0054] When the minute current detecting a preset minimum current value to the device 19 I ₂ 1 (A), the maximum current value and I _{2 2} (A), the discharging current value I is, I ₂ 1 ≦ I determines whether satisfy ≦ I ₂ 2. Incidentally, it is generally I ₂ 2 tens mu (A) ~ several hundred m (A).

[0055] Here, if it meets the _{I 2 1 ≦ I ≦ I 2} 2, as it is the processing proceeds according to the flowchart shown in FIG. 8, if the _{I <I 1, I 2 <} I, negative ions / ozone generator Through the controller 16 and the controller 18 of the device K, a signal indicating a discharge abnormality is output to the input device 17, and an operation stop signal is output to the blower 7 and the high voltage application device 13. By combining the minute current detecting device 19 and the input device 17 configured as described above to form an intermittent control device capable of intermittently operating the device, the air conditioning system B always operates only when necessary. Become like

Since the air conditioning system B is configured as described above, even if the concentrations of the negative ion gas and the ozone gas to be irradiated deviate from the set values, they can be controlled to the preset concentrations. Air conditioning system B only when necessary
Operates, so that costs such as power consumption do not increase unnecessarily.

Although the photoelectric sensor 24 is omitted in this embodiment, the photoelectric sensor 24 may be used in the air conditioning system B by the method described in the first embodiment.

Embodiment 3 FIG. In the third embodiment, the air conditioning system B shown in the second embodiment includes:
An air conditioning system C to which a negative ion sensor for measuring the air concentration of negative ions and an ozone sensor for measuring the air concentration of ozone ions will be described with reference to the drawings.

FIG. 9 is a schematic configuration diagram showing the configuration of the air conditioning system C. In this air conditioning system C,
The same members as those of the above-described air conditioning system B are denoted by the same reference numerals, and description thereof will be omitted.

The air conditioning system C is provided with an input control device 17a in place of the input device 17 used in the air conditioning system B, and a voltage / pulse frequency computing device 39 in place of the output computing device 27. Further, a negative ion concentration sensor 33, an ozone concentration sensor 34, a concentration calculation device 38, and an irradiation concentration display device 37 are provided.

The input control device 17a inputs the start and stop of each negative ion / ozone generator K, and sets and inputs the negative ion concentration and ozone concentration to be irradiated to the food 31.

The negative ion concentration sensor 33 is disposed inside the warehouse S and detects the negative ion concentration. Ozone concentration sensor 3
Reference numeral 4 is disposed inside the warehouse S and detects the ozone concentration. Here, the numbers of the negative ion / ozone generators K, the negative ion concentration sensors 33, and the ozone concentration sensors 34 are not limited to the illustrated numbers.

The concentration calculator 38 calculates the negative ions and ozone in the warehouse S based on the signals corresponding to the negative ions and ozone in the air detected by the negative ion concentration sensor 33 and the ozone concentration sensor 34. The irradiation density to be irradiated into the space of is calculated.

The irradiation density display device 37 is a
The irradiation concentration of negative ions and ozone is displayed based on the signal corresponding to the physical quantity corresponding to the calculation result calculated in step 8.

The voltage value / pulse frequency calculating device 39 calculates the air volume sent from the blower 7 and the high voltage applying device 1 based on the signal corresponding to the physical amount input from the input control device 17a.
A voltage value and a pulse frequency applied to 3 are calculated.

Next, the operation of the air conditioning system C will be described. FIG. 10 is a control block diagram of the air conditioning system C. First, after inputting a predetermined negative ion concentration and ozone concentration to the input control device 17a, a start signal is input to operate the negative ion / ozone generator K, and then A ₁
Minutes later (preferably after 1 minute to 15 minutes), A ₂
At minute intervals (preferably an arbitrary interval between 1 minute and 60 minutes), the negative ion concentration sensor 33 and the ozone concentration sensor 34 output the negative ion concentration C _N1 / cm ³ inside the warehouse S, respectively. , The irradiation ozone concentration C ₀ ppm is detected.

A signal corresponding to each detected physical quantity is output to a concentration calculator 38, which calculates the concentration of negative ions irradiated on the foodstuff 31. The signal corresponding to the calculation result is a display of the irradiation concentration. Output to the device 37,
The concentration of the negative ions irradiated inside the warehouse S is displayed.

Further, the negative ion concentration during irradiation and the ozone concentration during irradiation calculated by the concentration calculating device 38 are compared with the negative ion concentration and ozone concentration stored in the input control device 17a in advance, respectively. The following processing is performed on the comparison determination result.

First, the absolute value of the difference between the detected negative ion concentration C _N / cm ³ and the previously input negative ion concentration C _N1 / cm ³ is compared with a predetermined value ΔC, and | C _N -C
_{If N1} |> ΔCN is satisfied, the voltage difference ΔV (V) set in advance in the voltage value / pulse frequency calculating device 39
Is added to the voltage value Vv first input to the voltage value / pulse frequency calculation device 39 to obtain (V + ΔV) (V), and a signal corresponding to this physical quantity is output to the controller 16 via the control device 18.

When | C _N −C _N1 | ≦ ΔC is satisfied, the ozone concentration C detected by the ozone concentration sensor 34 is satisfied.
₀ ppm and the absolute value | C ₀ −C ₀₁ | of the difference from the ozone concentration C ₀ ppm preset in the input control device 17a.
And the physical quantity ΔC preset in the concentration calculating device 38
A magnitude relationship between the two and O is determined.

First, in the case of ΔCO <C ₀₁ −C ₀ which is one of the conditions satisfying | C ₀ −C ₀₁ |> ΔCO, the ozone concentration is lower than the value previously input to the input control device 17a. Is determined, and the frequency (f +
A signal corresponding to Δf) (Hz) is output to the controller 16 via the control device 18. Note that the frequency (f + Δ
f) (Hz) is a value obtained by adding a physical quantity Δf preset in the concentration calculator 38 to the pulse frequency f (Hz) of the applied voltage corresponding to the output of the ozone concentration of C ₀₁ ppm.

On the other hand, when C ₀ + ΔCO <C ₀₁ , it is determined that the ozone concentration is higher than the ozone concentration input to the input control device 17a in advance, and the pulse frequency for generating only negative ions is determined. The signal corresponding to F (Hz) is
It is output to the controller 16 via the control device 18. Note that F (Hz) is preferably 100 Hz to 2 kHz.

When | C ₀ −C ₀₁ | ≦ ΔCO is satisfied, the physical quantities such as the applied voltage, the pulse frequency, and the blowing wind speed are maintained.

Since the air conditioning system C is configured as described above, it is possible to prevent a change in the amount of generated negative ions / ozone due to a change in the amount of discharge due to deterioration of the negative ion / ozone electrode section. In this air conditioning system C, the photoelectric sensor 24 is not used, but this is
It is also conceivable to use it together with the ozone concentration sensor 34. In this case, the photoelectric sensor 24 operates as described in the first embodiment.

Fourth Embodiment In the fourth embodiment, the air conditioning system C shown in the third embodiment is further installed at a predetermined position in the warehouse S, and An air conditioning system comprising a humidifier and a humidifier controller that activates the humidifier when the ozone concentration detected by the ozone concentration sensor exceeds a predetermined value. D will be described with reference to the drawings.

FIG. 11 is a schematic configuration diagram showing the configuration of the air conditioning system D. In this air-conditioning system D, the same members as those in the above-described air-conditioning system C are denoted by the same reference numerals, and description thereof will be omitted.

The air conditioning system D includes a humidifier / dehumidifier 35,
And an ozone concentration comparison / determination means 45.

The humidifier 35 supplies high-humidity air into the warehouse S, but also dehumidifies the air.

The ozone concentration comparison / judgment means 45 compares and judges the magnitude of the physical quantity detected from the ozone concentration sensor 34 with a preset ozone concentration. Outputs a signal corresponding to the start of operation.

Next, the operation of the air conditioning system D will be described. FIG. 12 is a control block diagram relating to the air conditioning system D. After generation of ozone gas, it has been found that the half-life in space is more than ten hours and the residence time is long. However, it has been found that when the amount of absolute humidity in the space increases, water and ozone gas contributing to the space humidity cause a catalytic decomposition reaction, and have an effect of reducing the concentration of retained ozone.

◎

[Formula 1] In this air conditioning system D, the ozone concentration sensor
A certain time t ₀For each (s), in the warehouse S
The signal corresponding to the ozone concentration of the part is
Output to stage 45.

The magnitude of the preset ozone concentration C1 is compared, and if it is determined that C> X1, the humidifier / dehumidifier installed inside the warehouse S from the ozone concentration comparison / determination means 45 via the control means 18 is determined. An activation signal is output to 35.

Thus, the water droplets sent from the humidifier 35 react with the ozone gas staying in the warehouse S by causing a catalytic decomposition reaction to reduce ozone to oxygen in a short time. However, these water droplets are different from gaseous water, which is the humidity in the space. Then, the ozone gas concentration in the warehouse S decreases in a short time due to this reaction.

Next, when the value detected by the ozone sensor detects a concentration _{equal to} or less than the preset minimum ozone concentration C _{0MIN in the} ozone concentration comparison / determination means 45, a signal for switching the operation of the humidifier / dehumidifier 35 to the dehumidification mode. Is output. Based on this signal, the dehumidifying operation is performed for the same time as the time previously stored in the storage device provided in the humidifier 35,
5 to minimize the fluctuation of humidity in the warehouse S.
After the operation of the predetermined dehumidifier, the operation of the humidifier 35 is stopped.

Since the air conditioning system D is configured as described above, even if the ozone concentration in the warehouse S exceeds a predetermined value, the ozone concentration can be quickly reduced.

[0086]

As described above, according to the air conditioning system of the first aspect of the present invention, a negative ion / ozone generator, at least two or more photoelectric sensors, and a negative ion / ozone generator.
A control device that controls, stops, or starts the operation of the ozone generator, a microcurrent detection device, and a computing device that determines the operating state of the device are provided. By irradiating a mixed gas of ion gas and low-concentration ozone gas, the growth of living bacteria and fungi on the surface of food can be suppressed without adversely affecting human health or surrounding equipment, and the decay and denaturation of food can be prevented. I can do it. In addition, inefficient irradiation of the negative ion concentration and the ozone concentration can be prevented.

According to the air conditioning system of the second aspect of the present invention, a negative voltage value / pulse frequency detecting device for detecting a negative voltage value of a negative pulse high voltage and a pulse frequency, and a negative pulse high voltage A comparison device for comparing the negative voltage target value and the pulse frequency target value of
An emergency control device that stops the operation of the ozone generation device and displays an abnormal operation state is provided, so that even if the concentrations of the negative ion gas and the ozone gas to be irradiated deviate from the set values, the concentration can be set to the preset concentration. Can be controlled.

According to the air conditioning system of the third aspect of the present invention, the operation of the apparatus is determined based on the result of comparing the minute current value detected by the minute current detecting apparatus with an arbitrary preset minute current value. Since the intermittent control device is provided intermittently, it is possible to prevent a change in the amount of negative ions / ozone generated due to a change in the discharge amount due to deterioration of the negative ion / ozone electrode unit.

According to the air conditioning system of the present invention, there is provided an ozone concentration sensor for detecting an ozone concentration, and a humidifier for controlling humidity, and the ozone concentration detected by the ozone concentration sensor. Is provided with a humidifier controller that activates the humidifier when exceeds a predetermined value, so that even if the ozone concentration exceeds the predetermined value, the ozone concentration can be reduced quickly. .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an air conditioning system according to a first embodiment.

FIG. 2 is a control block diagram of the air conditioning system according to the first embodiment.

FIG. 3 is a control flow chart of the air-conditioning system according to the first embodiment.

FIG. 4 is a diagram showing a capacity correlation of the negative ion / ozone generator of the air conditioning system according to the first embodiment.

FIG. 5 is a diagram showing a correlation between a negative ion concentration and a negative ion / ozone outlet of the air conditioning system according to the first embodiment.

FIG. 6 is a schematic configuration diagram of an air conditioning system according to a second embodiment.

FIG. 7 is a control block diagram of an air conditioning system according to a second embodiment.

FIG. 8 is a control flowchart of the air conditioning system according to the second embodiment.

FIG. 9 is a schematic configuration diagram of an air conditioning system according to a third embodiment.

FIG. 10 is a control block diagram of an air conditioning system according to a third embodiment.

FIG. 11 is a schematic configuration diagram of an air conditioning system according to a fourth embodiment.

FIG. 12 is a control block diagram of an air conditioning system according to a fourth embodiment.

[Explanation of symbols]

S warehouse, K negative ion / ozone generator, 1 negative ion / ozone generator housing, 2 metal wire electrode, 3 conductive mesh, 4 metal spring, G negative ion / ozone generating electrode section, 6 insulator, 7 blower , 9 Fixing bracket, 1
1 dustproof filter, 12 metal catalyst, 13 high voltage application device, 14 delivery direction control device, 16 controller, 1
7 input device, 17a input control device, 18 control device, 19 microcurrent detection device, 21 arithmetic device, 24
Photoelectric sensor, 25 output calculation device, 26 comparison / judgment means, 27 calculation value comparison / judgment hand, 29 abnormal discharge display device, 31 food, 33 negative ion concentration sensor, 34 ozone concentration sensor, 35 humidifier / dehumidifier, 37 irradiation concentration display Device, 38 concentration calculator, 39 voltage value / pulse frequency calculator, 45 ozone concentration comparison and determination means.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junji Hirotsuji 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Inside Mitsubishi Electric Corporation (72) Inventor Tetsuo Watanabe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation F-term (reference) 4C080 BB05 BB06 BB08 BB09 CC14 HH02 MM08 QQ11 QQ20

Claims (4)

[Claims] At least a negative ion / ozone generator for generating negative ions and ozone, the presence or absence of an object in the warehouse, and a distance between the object and the negative ion / ozone generator are measured. A photoelectric sensor that outputs a detection signal as a detection signal; a control device that controls, stops, or starts the operation of the negative ion / ozone generator according to the detection signal; and a negative ion / ozone generator provided in the negative ion / ozone generator.
A minute current detecting device for detecting a minute current generated from a negative ion / ozone generating electrode portion which is an electrode of an ozone generating portion; and the negative ion / ozone generation based on a minute current value detected by the minute current detecting device. An arithmetic unit for judging the operating state of the device. 2. The air conditioning system according to claim 1, wherein a negative voltage value / pulse frequency detecting device for detecting a negative voltage value of a negative pulse high voltage and a pulse frequency at the negative ion / ozone generating electrode unit. A negative voltage value of the negative pulse high voltage detected by the negative voltage value / pulse frequency detection device, a pulse frequency, and a preset value corresponding to the air volume blown out from the negative ion / ozone generation device, A comparison device for comparing a negative voltage target value of the negative pulse high voltage and a pulse frequency target value, and based on an output signal from the comparison means,
An emergency control device for stopping operation of the ozone generator and displaying an abnormal operation state, and an air conditioner. 3. The air conditioning system according to claim 1, wherein the minute current value detected by the minute current detection device is:
An air conditioning system, comprising: an intermittent control device that intermittently performs the operation of the negative ion / ozone generator according to a result of comparison with a predetermined small current value. 4. The air-conditioning system according to claim 1, wherein the air-conditioning system further includes an ozone concentration sensor that detects an ozone concentration; A humidifier that is installed at a location and adjusts the humidity in the warehouse.When the ozone concentration detected by the ozone concentration sensor exceeds a predetermined value, the humidifier An air conditioning system, comprising: