JPH08209B2 - Air purifier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air cleaning device, and more particularly to an air cleaning device suitable for discharging dust, cigarette smoke, and other particulate components to the outside. Is.

[Conventional technology]

(1) Generally, many air purifiers for removing particles in an air-conditioned room are those that collect particles by using a filter. As the filter, an ordinary filter filter and a charged filter that adsorbs the charged particles are often used, but in any case, the trapped particles are accumulated in the filter.

For such filters, see "Air Conditioning and Freezing".
It is discussed in "Air Purifiers and Air Filters" written by Kazuya Nakagawa et al. In the January 1983 issue, page 60.

(2) An air conditioner for cooling and heating is provided with a filter as shown in FIG. 2 of JP-A-55-6178, for example. Generally, this type of filter has relatively large dust. It does not have a function of collecting particles of about 1 μm or less such as cigarette smoke.

(3) Further, although there is a method by ventilation as a means for removing cigarette smoke and the like from the room, an air conditioner that can also perform ventilation by being integrated with a separate type air conditioner, heater, or cooling / heating air conditioner It was a long time ago.

[Problems to be Solved by the Invention]

Since the prior art of the above (1) accumulates trapped particles in the filter, when there is a smoker in the air-conditioned room, the tar component of the cigarette adheres to the filter, and even when the user is not smoking. However, there was a problem that the air that smelled of tar was blown out.

Further, in the prior art of the above (2), it is necessary to use a fine mesh filter in order to collect particles of about 1 μm with a filter mounting structure equivalent to that described in JP-A-55-6178. However, in this case, there is a problem that the ventilation amount of the filter reduces the amount of ventilation and the original cooling and heating function deteriorates.

Further, when the above-mentioned conventional technique (3) is applied to, for example, a separate type room air conditioner (hereinafter simply referred to as a room air conditioner), it is not necessary to newly provide a hole for ventilation in the wall, but for connecting indoor and outdoor pipes. If you try to ventilate through the air passage in the hole, you will need a pressure fan such as a blower,
There was a problem that power consumption and noise would increase.

The present invention has been made to solve the above-mentioned problems of the prior art, and discharges the collected particle components outdoors without accumulating them in the apparatus main body, and, for example, in a separate room air conditioner or the like. It is an object of the present invention to provide an air cleaning device with low power consumption and low noise that does not deteriorate the original cooling / heating function even when incorporated.

[Means for solving the problem]

In order to achieve the above-mentioned object, the structure of an air purifying device according to the present invention is an air purifying device having an air flow path and a dust collecting chamber in a case having a suction grill and a blowing grill. Means for guiding air to the dust collecting chamber, a guide member, a discharge pipe having one end opened to the dust collecting chamber and the other end open to the outside, a first electrode provided in the dust collecting chamber, and the discharge A second electrode having a polarity opposite to that of the first electrode provided on the side of the tube opening into the dust collection chamber; and a third electrode having the same polarity as the second electrode provided in the discharge tube. It is a thing.

More specifically, the first electrode is for generating corona discharge, and the second electrode is for absorbing charged particles charged by the corona discharge.

 The concept of developing the present invention will be additionally described below.

In order to prevent the collected particles from accumulating in the air cleaning device, it is sufficient to discharge the collected particles to the outside, and as a means for collecting and discharging the particles, the particles are charged by discharging (for example, negative particles). Charged), and then attracted in the direction of the electrode that has the opposite polarity to that charge, and led this particle component into the duct,
It may be discharged to the outside through the pipeline.

[Action]

 The operation of the present invention will be described with reference to FIG.

 FIG. 2 is an explanatory diagram showing the operating principle of the present invention.

In FIG. 2, 1 is a high-voltage negative electrode, 2 is a high-voltage positive electrode, 3 is a particle discharge pipe, and 4 is a wall for partitioning indoors and outdoors. Reference numeral 5 is a transformer, the output terminals of which are connected to the negative electrode 1 and the positive electrode 2, respectively.

When the transformer 5 is energized, a voltage of −V is applied to the negative electrode 1 and a voltage of + V is applied to the positive electrode 2, negative ions are generated by the corona discharge, and the particles 6a near the entrance of the particle discharge tube 3 have a negative charge −. It is charged to q. An electric field is generated by the electrodes in this space, and its equipotential lines are 7a, 7b,
...... Assuming that the electric field strength in the space where the particle 6a exists is E, a force qE acts on the particle 6a, and the equipotential line 7
Along the electric field line 8a (direction from the positive electrode to the negative electrode) orthogonal to a, 7b, ..., the direction of the electric field line is opposite to the direction of the electric field line. As a result, the particles move to 6b, The position of the positive electrode 2 is reached.

When the negative ions generated by the corona discharge move toward the positive electrode, they also collide with neutral particles and give kinetic energy.
Therefore, when the negatively charged particles 6a and the neutral particles to which the kinetic energy is applied move in the particle discharge pipe 3, a slight flow also occurs in the air itself due to the viscous action of the air, and the vicinity of the positive electrode 2 is generated. The particles 6b that have moved up to the point 6 flow out of the particle discharge pipe 3 due to the inertial force of the particles 6b and along the air flow as shown by particles 6c.

〔Example〕

Embodiments of the present invention will be described below with reference to FIG. 1 and FIGS. 3 to 7.

First, FIG. 1 is a vertical sectional view of an air cleaner for an air conditioner according to an embodiment of the present invention.
An indoor unit for a separate room air conditioner.

In FIG. 1, reference numeral 10 is a case of an indoor unit, in which a fan 11 relating to the blowing means sucks in indoor air of an air-conditioned room through a suction grill 12, a filter 13 and a heat exchanger 14, and blows air out of a blowing grill 15. It is configured to blow out.

A partition plate 16 for partitioning the dust collection chamber 18 is provided in the case 10 so that a part 17 of the air flow blown by the fan 11 can be sent to the dust collection chamber 18. Further, a guide plate 19 which is a guide member for further dividing the part of the air flow 17 is provided in the dust collection chamber 18, and a negative electrode related to the first electrode is provided in the upper space area thereof. Cathode ray
Twenty is stretched. As the cathode wire 20, a piano wire or a stainless wire having a wire diameter of about 80 μm is used so as to be easily discharged.

The dust collection chamber 18 is in communication with a particle discharge pipe 21 which serves as a discharge flow path for air containing a particle component, and the particle discharge pipe 21 penetrates the wall 4 so that the particle component can be discharged outdoors. Is configured.

Below the portion where the particle discharge pipe 21 opens to the dust collection chamber 18 (hereinafter referred to as the dust collection chamber opening), a positive electrode plate 22 relating to the second electrode is provided on the inner surface of the case 10, and the particle discharge pipe 21 is provided. A ring-shaped positive electrode 23 relating to the third electrode is also provided inside so as to fit into the inner circumference of the particle discharge pipe.

Each of these electrodes is -V _{1 on} the cathode line 20 by a transformer (not shown), + V ₁ on the positive electrode plate 22, and a ring-shaped positive electrode.
A voltage of + V ₂ is applied to 23. Here, V ₂ > V ₁ .

When the room air conditioner equipped with the air cleaning device having such a configuration is operated, the fan 11 rotates and the air in the air-conditioned room (indoor) is sucked through the suction grill 12, the filter 13, and the heat exchanger 14, A part 17 of the air flow is guided into the dust collection chamber 18 as shown by the arrow.

Generally, the air volume of an air purifier of the type of the prior art (1) described above, which is used in a normal home room, is about 0.5 m ³ / min. Therefore, the air flow 17 introduced into the dust collection chamber 18 may be about 7% of the intake air amount of the room air conditioner, and about 7% of the air is introduced to the dust collection chamber.

The air flow 17 guided to the dust collection chamber 18 is further guided by the guide plate 19
And the majority of the air flows above the guide plate 19 as indicated by the air flow 24. In the dust collection chamber 18, the air passage cross-sectional area is enlarged from the inlet portion 25 to the central portion 26, and the air flow flowing therebetween is decelerated.

The upper portion of the guide plate 19 of the dust collecting chamber 18 by the corona discharge of the cathode line 20 a voltage is applied to -V _2, the particles 27a of the air this ambient, 28a, 29a is charged to a negative charge, previously For the reason described in the explanation of the operation of the principle, the particles move to the positive electrode plate 22 or the ring-shaped positive electrode 23 to become particles 27b, 28b, 29b. When the particles 27b, 28b, 29b further approach the positive electrode plate 22, they are turned along the positive electrode plate 22 along with the flow of the arrow of the air flow 30 guided to the lower side of the guide plate 19. ,
These particles are directed towards the entrance of the particle discharge tube 21. The particles 27c, 28c, 29c that have come near the inlet of the particle discharge pipe 21 are further attracted toward the ring electrode 23 and flow into the particle discharge pipe 21.

When a corona discharge occurs in the dust collecting chamber 18, the negative ions flowing toward the positive electrode collide with neutral particles to give kinetic energy, as described above. Therefore, when the negatively charged particles and the neutral particles to which the kinetic energy is applied move, the viscous action of the air also causes a flow in the air itself, enters the particle discharge pipe 21, and rides on the flow. 27c, 28c, and 29c are discharged from the particle discharge pipe 21 to the outside.

As described above, as the particles in the dust collection chamber 18 are closer to the entrance of the particle discharge pipe 21, the particle concentration relating to the particle density in the air is higher, and the air having a higher particle concentration is discharged from the particle discharge pipe 21. On the other hand, the air having a low particle concentration returns to the upstream side 32 of the fan 11 as indicated by the air flow 31. That is, Juan 11
Since the upstream side 32 has a lower pressure than the downstream side 33, the pressure in the dust collection chamber 18 is slightly higher than the pressure on the fan upstream side 32, and the air flow 31 is generated.

According to the present embodiment, the particles are electrically charged, the particle density in the air is partially increased by the action of the electric field, and the air having a high particle density is discharged to the outside. Since no such particles have accumulated in the device, it does not blow out the odorous air of cigarettes, for example, when not smoking.

Also, since air with a high particle density is discharged, if a certain amount of particles are to be discharged, a certain amount of particles should be discharged with a particle discharge pipe with a smaller diameter than in the case of simply exhausting. Is possible.

Furthermore, compared to the case of using a pressure fan such as a blower for ventilation, there is no moving part, so there is no problem of noise,
The power consumption is about 10 W, which means that the power consumption can be significantly reduced as compared with the case of using a pressure fan.

Next, another embodiment of the present invention will be described with reference to FIG.

FIG. 3 is a vertical sectional view of an air cleaning device according to another embodiment of the present invention, which is an example of an air cleaning single-purpose machine.

In FIG. 3, reference numeral 34 denotes a case, which is configured to suck the air in the room through a suction grill 36 and a filter 37 for removing coarse dust such as cotton dust by a fan 35 related to the blowing means. The air that has flowed into the dust collection chamber 39 through the airflow direction vanes 38a, 38b, and 38c, which are indoor members, and the dust-removed air flows out from the blowout grill 40.

In the dust collection chamber 39, a cathode wire 41 serving as a negative electrode related to the first electrode is stretched. As the cathode wire 41, a piano wire or a stainless wire having a wire diameter of about 80 μm is used so that it can be easily discharged.

The dust collection chamber 39 is connected to a particle discharge pipe 42 related to a discharge passage of air containing a particle component, and the particle discharge pipe 42 penetrates the wall 4 to discharge the particle component to the outside. Has been done.

A case 34 is provided above the opening of the dust collection chamber of the particle discharge pipe 42.
A positive electrode plate 43 relating to the second electrode is provided on the inner surface, and a ring-shaped positive electrode 44 relating to the third electrode is also provided inside the particle discharge pipe 42 so as to fit into the inner circumference of the particle discharge pipe. .

A voltage (-V ₂₎ is applied to the cathode line 41, a voltage + V ₁ is applied to the positive electrode plate 43, and a voltage + V ₂ is applied to the ring-shaped positive electrode 44 by a transformer (not shown). Here, V ₂ > V ₁ .

When the operation of the air cleaning device having such a configuration is started,
The fan 35 rotates, and the air in the room is sucked through the suction grill 36 and the filter 37, and then enters the dust collecting chamber 39 through the wind direction plates 38a, 38b, 38c. Here, the particles 45a, 46a, 47a are cathode ray 41
Is charged by the corona discharge, moves toward the positive electrode plate 43, and is guided by the flow of the air flow 48 shown by the arrow toward the inlet of the particle discharge pipe 42, as shown in the embodiment of FIG. In the same manner as in the case, the particles are discharged from the particle discharge pipe 42 to the outside of the room.

According to this embodiment, an effect similar to that of the embodiment shown in FIG. 1 is expected, and an excellent air purifying single-purpose machine can be provided.

In the embodiment of FIGS. 1 and 3 described above,
The case where the length of the particle discharge pipe 21 may be such that the wall 4 can be penetrated is shown, but depending on the use condition, the particle discharge pipe may be made a little longer. An embodiment in such a case will be described with reference to FIGS. 4 to 7.

4 to 6 are longitudinal sectional views of the air cleaning apparatus for an air conditioner according to still another embodiment of the present invention. The air conditioner shown in each of these figures is an indoor unit of a separate type room air conditioner, and the structure of the indoor unit shown in FIG. 1 is exactly the same as that of the main body, except that the particle discharge pipe is different from that shown in FIG. It's been a long time. In each drawing, the same reference numerals as those in FIG. 1 are the same parts, and the description thereof will be omitted.

If the length of the particle discharge pipe becomes long as in the embodiment of FIGS. 4 to 6, the particle component may not be discharged sufficiently due to the flow resistance of the air flowing therein.

Therefore, in the embodiment of FIG. 4, in addition to the ring-shaped positive electrode (first ring-shaped positive electrode) 23 related to the third electrode, the particle discharge pipe 21A is provided with a second electrode as another third electrode. A ring-shaped positive electrode 49 is provided so as to be fitted into the inner circumference of the particle discharge pipe, and a voltage of + V ₃ is applied to this second ring-shaped positive electrode 49 from a transformer (not shown). In this case, the voltage is set by setting the voltage of the positive electrode plate 22 to + V ₁ , the first ring-shaped positive electrode 23
When the voltage of + V ₂ is set to V ₁ <V ₂ <V ₃ , a so-called accelerating electric field is formed, and particles passing through the first ring-shaped positive electrode 23 are attracted by the second ring-shaped positive electrode 49. Accelerate particles, enhance the effect of outdoor discharge.

Although the second ring-shaped positive electrode 49 is provided in FIG. 4, third, fourth, etc. ring-shaped positive electrodes may be similarly provided to form a multistage accelerating electric field. .

Next, in the embodiment shown in FIG. 5, the second negative electrode 50 and the third positive electrode 51 are provided as other electrodes near the particle discharge end of the particle discharge pipe 21B.

The second negative electrode 50 is fixed as a needle-shaped electrode in substantially the center of the particle discharge tube 21B in a state in which air can flow, and the third positive electrode 51 is also inside the particle discharge tube 21B. It is fixed so that air can flow. Voltages of −V ₄ and + V ₄ are applied to each electrode by a transformer (not shown). In this case, corona discharge occurs between the second negative electrode 50 and the third positive electrode 51, negative ions are generated, and the particles are negatively charged, and the negatively charged particles are transferred to the third positive electrode 51. Gravitate. Further, when the negative ions face the third positive electrode 51, they collide with neutral particles and give kinetic energy to the neutral particles. At that time, since the air itself also flows along the flow path due to the viscous effect of the air, the air in the dust collection chamber 18 is discharged through the particle discharge pipe 21B.
It is inhaled to the outside and promotes the discharge of the particle component to the outside by the action of a so-called ion blower or ion pump.

Next, in the embodiment shown in FIG. 6, the second ring-shaped positive electrode 49 and the third ring-shaped positive electrode 52 are provided in the particle discharge pipe 21C at a slight distance from the inner circumference of the particle discharge pipe. It is provided so as to be fitted.

The second ring-shaped positive electrode 49 + V _3, applied to + V ₄ to the third ring-shaped positive electrode 52, V _4> With V _3, the effect of accelerating field described in the embodiment of FIG. 4 In addition to the above, the effect of the electric field type electron lens described below works and particles tend to collect near the tube axis center of the particle discharge tube 21C.

The operation of this electric field type electron lens will be described with reference to FIG.

FIG. 7 is an explanatory view showing the principle of the electric field type electron lens in the particle discharge tube part of FIG. 6, and in order to make it easier to understand the phenomenon, the second ring electrode 49 and the third ring are modeled. Only the electrode 52 is taken out to show a mechanical model acting on the particle.

An electric field is generated between the second and third ring-shaped electrodes by the electrodes, and the equipotential lines 54 are as shown by the broken lines. When the negatively charged particles 53 enter this electric field, the particles 53 move along the direction opposite to the arrow of the electric force line 55 orthogonal to the equipotential line 54. When the particles 53 pass the position A and come to the position B, they reach the position C, which is deviated from the electric force line 55 due to the inertial force. Particle 53 has an arrow due to its inertial force.
Attempts to move in the direction of 56, while the positive electrode 52 causes an arrow 57
A force acts in the direction of, and as a result, the particle advances in the direction of arrow 58 as a composite vector. Therefore, the particles are attracted to the center of the tube and pass through the electrode portion along the center of the tube axis to reach the point D.

Therefore, the particles are accelerated by the electric field and at the same time try to collect at the center of the axis of the particle discharge pipe 21C, so that even if the particle discharge pipe has a long length, the ratio of particles adhering to the tube wall decreases,
The frequency of cleaning the particle discharge pipe 21C can be reduced.

It should be noted that each of the embodiments shown in FIGS.
Although the air cleaning device for the indoor unit of the room air conditioner shown in the figure has been described as an example, the same effect can be expected when the air cleaning single-function machine shown in FIG. 3 is taken as an example.

Further, although the ring-shaped electrode is attached to the particle discharge tube in each of the above-described embodiments, a parallel plate electrode may be used when the particle discharge tube has a rectangular cross section or the like.

Furthermore, the positive and negative of the electrodes may be reversed in any of the above-described embodiments.

〔The invention's effect〕

As described above, according to the present invention, the collected particle component is discharged to the outside without accumulating in the main body of the device, and the original cooling / heating function is achieved even when incorporated into a separate room air conditioner or the like. Thus, it is possible to provide an air purifying device with low power consumption and low noise that does not reduce the noise.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an air cleaner for an air conditioner according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the operating principle of the present invention, and FIG. 3 is another view of the present invention. FIGS. 4 to 6 are longitudinal sectional views of an air purifying apparatus according to an embodiment, and FIGS. 4 to 6 are longitudinal sectional views of an air purifying apparatus for an air conditioner according to still another embodiment of the present invention. It is explanatory drawing which shows the principle of the electric field type electron lens in the particle | grain discharge pipe part of FIG. 4 ... Wall, 11,35 ... Juan, 12, 36 ... Suction grill,
15,40 …… Blowout grill, 16 …… Partition plate, 18,39 …… Dust collection chamber, 19 …… Guide plate, 20,41 …… Cathode, 21,21A, 21B,
21C, 42 …… Particle discharge pipe, 22,43 …… Positive electrode plate, 23,44 ……
Ring-shaped positive electrode, 49 …… Second ring-shaped positive electrode, 50 ……
Needle-shaped negative electrode, 51 …… third positive electrode, 52 …… third ring-shaped positive electrode.

Front page continuation (72) Inventor Hirokatsu Kazobe, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Home Appliances Research Laboratory, Hitachi, Ltd. (72) Inventor Masahiro Takebayashi 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Home Appliance Research Laboratory, Hitachi, Ltd. (56) Reference JP-A-52-74179 (JP, A) JP-A-52-88873 (JP, A) JP-A-48-14151 (JP, A) JP-A-48-58459 (JP, A) Actually opened 55-147846 (JP, U) Actually opened 61-145233 (JP, U) Actually opened 63-181454 (JP, U)

Claims (2)

[Claims] 1. An air purifying apparatus having an air flow path and a dust collecting chamber in a case having a suction grill and a blowing grill, and an air blowing unit and a guide member for guiding indoor air to the dust collecting chamber. A discharge pipe having one end opened to the dust collection chamber and the other end opened to the outside; a first electrode provided in the dust collection chamber; and a discharge pipe provided on a side of the discharge pipe opened into the dust collection chamber. An air purification apparatus comprising: a second electrode having a polarity opposite to that of the first electrode; and a third electrode provided in the discharge pipe and having the same polarity as the second electrode. 2. The device according to claim 1, wherein the first electrode generates corona discharge, and the second electrode attracts charged particles charged by the corona discharge. An air purifier characterized by being a thing.