JP2729840B2 - Air deodorization / sterilization / purification method - Google Patents

Description

The present invention relates to a method for deodorizing, sterilizing, and purifying air by an electrostatic precipitating method, and more specifically, to an existing air conditioner, a ventilating device or a ventilation device. The present invention relates to a method of deodorizing, sterilizing, and purifying air by incorporating an electric dust collection unit.

[Prior art] The electrostatic precipitating method using the electrostatic separation action or electrostatic agglomeration action has been successfully implemented by Cottrell, beginning with the experiment in Holfeld in 1676, and has been improved in various fields. At present, it has been widely used from large industrial ones to small household ones.

In the electric dust collector, a power supply device including a DC high voltage generating means, an electrode unit including a charging electrode and a dust collecting electrode, and a forced ventilation means are required as minimum necessary components. Among these elements, regarding the forced ventilation means, a device that forms an air flow by using ionic wind generated between the high-pressure electrodes to collect dust is disclosed in, for example, Japanese Patent Publication No. 55-46219,
Although it is described in Japanese Patent Application Laid-Open No. 60-50462, forced air ventilation means for rotating a fan with a motor is generally required for industrial or domestic use due to a small air volume.

[Problems to be Solved by the Invention] As described above, in the conventional electrostatic precipitator, a power supply device for generating a high DC voltage, a charging electrode portion for charging dust and the like to be removed by corona discharge, and An adsorbing electrode unit for adsorbing the dust and the like by Coulomb force, a filter unit, and a forced ventilation unit for circulating air through the above units are required.

The forced ventilation means is composed of a fan and a motor,
Since air volume, size, noise, etc. are involved, it is not that any type can be used freely. Since the dust collection capacity is greatly affected by the air volume, it is desirable to use a large and efficient fan. There are certain restrictions due to noise problems and demands for power saving.

Here, looking over the space in which the air purifier is to be newly arranged, it is normal that a cooling / heating device and a ventilation device are already arranged. Apart from factories where dust collectors are installed to prevent pollution, installing air purifiers in such places not only reduces the indoor space, but also increases noise and reduces power consumption. There are also disadvantages. That said, it would be a big expense to buy an air conditioner with an air purifier.

The present inventor has proposed a solution to the above dilemma,
This led to the idea of an air purification method in which an already installed forced ventilation means such as a cooling and heating unit is used as ventilation means for an air purifier.

To make such an air purification method feasible,
As a problem of hardware, how to attach the electric dust collection unit to an existing air conditioner, etc. without significant modification, and at what position and how to attach the electric dust collection unit concretely And so on. Furthermore, even if it is referred to as an existing air conditioner or the like, since there is a difference in size as well as the type, there is a concern that manufacturing costs will be relatively high if an electric dust collection unit corresponding to each individual model is configured. .

In view of the above, the present invention realizes a method of deodorizing, sterilizing, and purifying air using existing ventilation means such as a cooling and heating device as forced ventilation means of an electric dust collector, and a method of deodorizing, sterilizing, and purifying such air. The main purpose is to clarify various devices on the hardware side to make it possible.

[Means for Solving the Problems] A method for deodorizing, sterilizing, and purifying air according to the present invention is to install a framework in place of an air intake unit of an existing air conditioner, and install a front negative electrode in the framework. An electrode unit composed of a charging electrode composed of a discharge electrode and a subsequent negative electrode as a dust collecting electrode, and a rectifier for converting an AC power supply to a DC for applying a DC high voltage current to the electrode unit in a pulsed manner. A power supply device comprising a device and a transformer device for converting to a pulsed high-voltage current is arranged to form a dust collection unit, and air is caused to flow in the dust collection unit by using forced ventilation means of the air conditioner. Purifying air, using a dust collection unit in which a filter unit is arranged before or after the preceding negative electrode and / or the following negative electrode, or at both stages , Respectively.

[Operation] The theory of dust collection in the electric dust collection unit is well known as charging of floating dust and the like by corona discharge between DC and voltage equal electrodes and adhesion of the charged floating dust and the like to the dust collecting electrode. The method of the present invention does not have a forced ventilation means by a fan which is an important component of the electric dust collector, and the electric dust collecting unit which does not function as a dust collector by itself is replaced with an air intake mechanism of an existing air conditioner or the like, in particular, usually. Since it is installed in place of the air intake unit that often includes a filter unit, if the air conditioner or the like is operated, the air to be purified by the forced ventilation means consisting of the motor and fan arranged inside the air conditioner is Passes through the electrostatic precipitating unit provided in place of the air intake unit, and according to the electric precipitating theory described above, such as floating dust, etc. Removal is performed and the air is purified.

[Example] Next, the method of the present invention will be described in detail according to an example in which the method of the present invention is applied to an air conditioner of a railway passenger car.

FIG. 1 is a perspective view showing an indoor portion of a cooling machine of a railway passenger car, and arrows indicate directions of air intake and air blowing. The electric dust collecting unit according to the method of the present invention is attached to an air intake 2 provided on the lower surface of the main body frame 1. This portion is a portion where an air intake unit having a mere slit-like opening is arranged in an existing cooling machine, and in some embodiments, a filter is arranged.

In general, the air intake port of the air conditioner has a structure that can be removed from the main body frame 1 as an air intake port unit by removing screws or the like in other modes for filter replacement. The air conditioner of the railroad passenger car shown in the drawing can be detached as an air intake unit by itself, and as shown in FIGS. 2 and 3, directly to the main body frame 1 or to the main body frame 1. The electric dust collection unit 10 according to the method of the present invention can be attached to the makeup dusts attached to the device without requiring any processing on these.

In the illustrated embodiment, the electrostatic precipitator unit 10 is attached to the main body frame 1 via a hinge mechanism for maintenance such as filter replacement. However, the electric dust collection unit 10 is completely removed from the main body frame 1 without such a hinge mechanism. Of course, it may be configured to be attached in a detachable state.

FIG. 4 is a sectional view of a main part of the electric dust collecting unit 10 to which the present invention is applied, and FIG. 5 is an exploded perspective view of the main part.

In the figure, reference numeral 11 denotes a frame serving as an outer frame of the electric dust collecting unit 10, and inside thereof, a dust collecting chamber 12 in which a dust collecting portion composed of an electrode and a filter to be described later is arranged, and a high level electrode. A power supply chamber 13 for disposing a power supply device for supplying a DC pulse of a voltage is provided separately.

A power supply device includes a rectifier that converts an AC power supply to a DC power,
A transformer device is provided for converting the obtained direct current into a pulsed high-voltage current of, for example, 3 to 8 KV.

 The configuration of the dust collecting section is shown in FIG.

In the figure, reference numeral 14 denotes a preceding negative electrode, which is formed of, for example, an aluminum wire mesh. Reference numeral 15 denotes a positive electrode, which is preferably formed of a tungsten wire having a diameter of about 0.3 mm. Reference numeral 16 denotes a negative electrode that is paired with the positive electrode 15, and is preferably formed of a plate made of aluminum.

Reference numeral 17 denotes a rear-stage negative electrode, like the front-stage negative electrode 14, which is made of an aluminum wire mesh or the like.
It is preferable to dispose a deodorant or a filter for preventing secondary contamination before or after the latter-stage minus electrode 17.

Pre-stage negative electrode 14, positive electrode 15 and negative electrode
16.The material and shape interval of the rear negative electrode 17 are important factors for the electrostatic precipitator because they are not only required to obtain a normal corona discharge, but also to prevent undesirable spark discharge and ozone generation. However, with respect to the application of the method of the present invention, a problem is how to easily and inexpensively match a variety of shapes and sizes of air intakes of existing air conditioners and the like.

The shape of the air intake in existing air conditioners,
Basically, they are square or circular and vary in size, but this part is usually configured to be removable as a single unit. Therefore, except for the shape or size, the manner in which the electric dust collection unit 10 of the present invention is attached to such an air intake portion is as follows.
That is, without removing the existing air intake unit, the front surface of the electric dust collection unit 10 according to the method of the present invention is removed.
A mode in which the existing air intake unit is completely removed, and an electric dust collecting unit 10 according to the method of the present invention is attached to this portion. In this embodiment, the dust collecting unit 10 is used as a framework.

Since the depth (thickness) of the electrostatic precipitating unit 10 according to the method of the present invention shown in FIGS. 4 and 5 is about 10 cm, any of the above-mentioned embodiments can be easily applied. Whether the embodiment is adopted depends on the depth of the internal space of the existing air conditioner and the electric dust collection unit according to the method of the present invention.
It depends on whether there are 10 installation spaces.

Further, the shape and size of the electric dust collecting unit 10 according to the method of the present invention are limited by the shape and size of the air intake of the existing air conditioner to which the electric dust collecting unit is to be mounted, it is merely a matter of design, Technically, it is only a matter of the configuration of the fixing means and the airflow load for preventing the airflow capacity (air volume) of the existing air conditioner from being reduced as much as possible. If this problem can be solved, there is no requirement that the shape and size of the electrostatic precipitating unit 10 according to the method of the present invention strictly correspond to the shape and size of the original air intake.

In this regard, regarding the shape and size of the electrodes, the former negative electrode 14 and the latter negative electrode 17 can be made to correspond to any shape and size by using, for example, an aluminum mesh. The plus electrode 15 is a matter of mere length and the minus electrode
16 can also be reduced to a mere length problem by using, for example, an aluminum material manufactured as a mold material having the same cross-sectional shape by an extrusion molding method and cut into a predetermined length.

[Experimental example] (1) Dust collection performance test The product in the illustrated example was put into normal operation state,
Supply P aerosol, measure the amount of dust at the entrance and exit, and obtain the dust collection efficiency.

Using equipment: light scattering particle counter test particles: DOP aerosol (particle size 0.3μm target) blowing flow rate: 1.3 m ³ / min (2) shown in sterilizing effect testing laboratory 32m ³ Example Product of Operate and measure the change in the number of airborne bacteria in the indoor air at regular intervals. For sampling of bacteria in the air, the membrane surface was held horizontally at a height of 1.0 m. The room air is sucked through the filter, and the filter that has sucked a certain amount of air is placed on a standard agar medium, cultured at 30 ° C. for 2 to 3 days, and the number of colonies generated on the filter is counted.

Measurement conditions 1) Suction flow rate 20 / min 2) Suction time 10min 3) Filter used Pore size 0.45μm Diameter 47mm Miriboa NAWG 047S2 Sampling time Air purifier operation time -10 minutes to 0 minutes Sample sampling before start 0 minutes Start of purifier operation 5 to 15 minutes Sampling of sample after 10 minutes 15 to 25 minutes Sampling of sample after 20 minutes 35 to 45 minutes Sampling of sample after 40 minutes 55 to 65 minutes Sampling of sample after 60 minutes Sample sampling from 75 minutes to 85 minutes 80 minutes after sampling 95 minutes to 105 minutes Sample sampling after 100 minutes 115 to 125 minutes Sample sampling after 120 minutes Results (1) Dust collection performance test The results are shown in Table 1.

(2) Test of bacteria elimination effect Table 2 shows changes in indoor floating bacteria during operation of the illustrated example product.

Sources of bacteria floating in the air are associated with dust, such as soil, humus excreta on the surface, and small pieces of clothing, and increase or decrease depending on people, animals and plants, soil conditions, temperature, humidity, wind, and the like. The rise in temperature and humidity has increased the growth of bacteria,
Dryness and wind increase bacterial air dispersal. Most of the bacteria in the air are non-pathogenic and in the upper atmosphere are aerobic spores. Further, the particle diameter is usually 1 to 100 μm, and it is considered that most of the particles are accompanied by dust particles. Therefore, it was confirmed that the dust removal of the indoor air by the air purifier of the present invention simultaneously performed the action of bacteria elimination.

[Effect] According to the method of the present invention, it is possible to form an air purifier by the electric dust collection method using the ventilation means of the existing cold (warm) air conditioner, so that only a simple dust collection means by a filter is used. By simply attaching it to an existing cold (warm) air conditioner that does not have it, it is possible to perform not only dust collection by a more efficient electric dust collection method but also germicidal removal.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cooling machine to which the present invention is applied, FIG. 2 is a perspective view showing a state where the dust collection unit is also opened, and FIG.
FIG. 4 is a partial cross-sectional view, FIG. 4 is a cross-sectional view of a main part of the dust collecting unit, and FIG. 5 is a perspective view of the main part. In the figure, each symbol indicates the following. 1: Body frame 2: Air intake 10: Electric dust collection unit 11: Frame 12: Dust collection unit 13: Power supply unit 14: Front negative electrode 15: Positive electrode 16: Negative electrode 17: Rear negative electrode

Claims (2)

(57) [Claims] 1. A framework is provided in place of an air intake unit of an existing air conditioner, and a framework is provided with a charging electrode composed of a preceding negative electrode and a discharging electrode, and a latter negative electrode serving as a dust collecting electrode. A power supply device comprising: an electrode unit configured; a rectifier for converting an AC power supply to DC; and a transformer device for converting to a pulsed high-voltage current, for applying a DC high-voltage current to the electrode unit in a pulsed manner. A method for deodorizing, sterilizing, and purifying air, wherein the air is purified by arranging a dust collecting unit and using the forced ventilation means of the air conditioner to move air in the dust collecting unit. 2. The air deodorizing / reducing system according to claim 1, wherein a dust collecting unit is used in which a filter unit is arranged at a stage before or after the negative electrode before and / or after the negative electrode. Bacteria and purification method.