JPH04281866A - Air cleaner - Google Patents

Abstract

PURPOSE:To reduce the size and weight of the air cleaner body and to provide the inexpensive air cleaner having high reliability by forming a discharge electrode part to a small size. CONSTITUTION:This air cleaner is constituted by constituting a discharge device part 33 of a flat planar grounding electrode 31 and needle-like discharge electrodes 30 disposed to face this flat planar grounding electrode 31, providing the needle-like discharge electrodes 30 at one end of a resistor 39 disposed on an insulating sheet 3, connecting the other end of the resistor 39 to a winding core conductor 40 to constitute the winding core thereof, winding the insulating sheet 38 around the winding core conductor 40, projecting the needle-like discharge electrode 30 parts from the winding part and applying a high voltage between the flat planar grounding electrode 31 and the winding core conductor 40.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner equipped with a discharge device for removing dust from the air inside an automobile or a house.

0002

BACKGROUND OF THE INVENTION In recent years, many air purifiers have been developed to purify cigarette smoke and odors in living spaces.

The structure of a conventional air cleaner will be explained with reference to FIG. As shown in FIG. 7, an air intake port 2 and an exhaust port 3 are provided on the side of an air purifier main body (hereinafter referred to as the main body) 1, and a motor 5 that drives a fan 4 is provided inside the main body 1.
Built-in. The motor 5 is sandwiched between a partition wall 7 and the main body 1 via a support rubber 6, and has an air intake port 8 which communicates with the air intake port 2 above the fan 4 through an air passage, and communicates with an exhaust port 3 at the side thereof. A spiral chamber 9 is formed.

[0004] A discharge electrode 10 formed in a sawtooth shape and a ground electrode 11 facing the discharge electrode 10 are provided near the intake port 2 in the air flow path leading from the intake port 2 to the swirl chamber 9. A prefilter 12 is provided on the upstream side of both electrodes 10 and 11.
A discharge device 13 is provided with the discharge device 13 being grounded, and a dust collection electrode section 14 for collecting dust charged by the discharge device 13 is provided in the air flow path on the downstream side of the discharge device 13. In the dust collection electrode section 14, positive and negative flat plate electrodes are arranged alternately to form an electric field between the flat plate electrodes. Further, activated carbon 1 for deodorization is provided on the downstream side of this dust collecting electrode section 14.
5, and a lid 16 is provided at the upper opening of the main body 1 via a gastight packing 17.

In the above configuration, when the air cleaner is operated, dust-containing air is taken in from the intake port 2, bulky dust such as cotton waste is removed by the pre-filter 12, and the discharge device 1
3, the remaining fine dust is charged and collected by the dust collecting electrode part 14 by the Coulomb force of the electric field of the dust collecting electrode part 14, further deodorized by the deodorizing activated carbon 15, and sucked into the swirl chamber 9 by the fan 4. , clean air is blown from the exhaust port 3.

Normally, it is desired to shorten the length of the discharge device 13 in the wind direction starting from the pre-filter 12 and make it compact.
2 or the distance between the discharge electrode 10 and the dust collection electrode section 14, the corona discharge current flows toward the prefilter 12 or the dust collection electrode section 14 instead of toward the opposing ground electrode 11. Therefore, the dust does not intersect with the inflowing air, and the dust cannot be charged. Therefore, the size cannot be reduced unless the distance between the ground electrode 11 facing the discharge electrode 10 is shortened. However, corona discharge cannot be stably generated simply by shortening the distance between the discharge electrode 10 and the ground electrode 11. For this reason, attempts have been made to apply a high voltage to the needle-shaped discharge electrode 10 via a resistor.

[0007]

[Problems to be Solved by the Invention] However, in such conventional air purifiers, the resistance connected to the needle discharge electrode requires a resistor having a large resistance value of several MΩ to several tens of MΩ. The length became long and the discharge device part also became large, making it impossible to make it sufficiently compact. Therefore, the main body 1 has become large, expensive and difficult to handle.

The present invention solves the above problems and aims to provide a small and inexpensive air cleaner.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the first technical solution of the present invention is to provide a discharge device with a flat ground electrode and a needle-shaped discharge facing the flat ground electrode. The needle-shaped discharge electrode is provided at one end of a resistor disposed on an insulating sheet, and the other end of the resistor is connected to a core conductor that serves as the core of the resistor, and the core conductor is connected to the core conductor. The insulating sheet is wound around the body, the needle-shaped discharge electrode part is made to protrude from the wound part, and a high voltage is applied between the flat ground electrode and the core conductor.

A second solution is to form a corner portion on the winding surface of the core conductor, and when winding the insulating sheet around the core conductor, place the resistor inside the core conductor. The resistor is wound along the body, and the resistor and the core conductor are brought into contact at the bent portions of the corners.

A third solution is to provide a plurality of resistors disposed on the insulating sheet, the other end of the resistor being connected to a printed conductor formed on the insulating sheet, and a plurality of resistors disposed on the insulating sheet. The width in the winding direction is made longer than the outer periphery of the core conductor, and the core conductor and the printed conductor are wound in contact with each other.

[0012] A fourth solution is to extend a fabric-like sheet portion of only an insulating sheet to the side to which the resistor of the printed conductor provided on the insulating sheet is not connected, and to roll this fabric-like sheet portion. The width in the direction is shorter than the outer circumference of the core conductor, and the sum of the widths of the fabric-like sheet and the printed conductor is longer than the length of the outer circumference of the core conductor.

[0013] A fifth solution is that the discharge device section is composed of a flat ground electrode and a needle discharge electrode facing the flat ground electrode, and the needle discharge electrode is disposed on an insulating sheet. The other end of the resistor is connected to a printed conductor formed on the insulating sheet, and the printed conductors of the two insulating sheets are brought into contact with each other to form the resistor. The two insulating sheets are overlapped by overlapping each other so that one ends thereof protrude in opposite directions, and the contact portion of the printed conductor is wound from the back side, and the needle-shaped discharge electrode is made to protrude from the wound portion. , a high voltage is applied between the flat ground electrode and the printed conductor.

[0014]

[Operation] The present invention has the above-mentioned first solution, so that even if the length of the resistor having a needle-shaped discharge electrode at one end becomes long, the resistor can be placed on an insulating sheet by printing or the like, so that the thickness can be reduced. By making it thinner and winding it around the core conductor, the storage length can be shortened.

According to the second solution, when the resistor side is brought into contact with the core conductor and wound around the core conductor, each resistor makes the strongest contact at the bent portion of the corner, so that the resistor and A conductive adhesive is no longer required for conduction of the core conductor.

According to the third solution, when the printed conductor connected to the other end of the resistor is brought into contact with the core conductor and an insulating sheet is wrapped around the core conductor, the portion that contacts the core conductor Since the resistor is always wound only on the printed conductor portion, the portion around which the resistor is wound is the back side of the insulating sheet, and the resistor and the core conductor do not come into contact with each other. Therefore, it is possible to eliminate the risk of wire breakage and variations in contact resistance due to direct contact between the corner portions of the resistor and the core conductor.

According to the fourth solution, when the insulating sheet is wound around the core conductor, the dough-like sheet portion is first wrapped, and the printed conductor is wrapped around the core conductor before the dough-like sheet portion has rotated once. Since the printed conductor is in direct contact with the conductor, electrical continuity with the core conductor can be achieved. In addition, since the width of the printed conductor plus the width of the dough-like sheet is longer than the outer circumference of the core conductor, the printed conductor overlaps the insulating sheet, and the part where the resistor is wound is always on the insulating sheet. Become. Therefore, the same function as the third solution can be obtained with a smaller dimensional width of the printed conductor than in the third solution.

[0018] According to the fifth solution, the printed conductors on two insulating sheets with the needle-shaped discharge electrodes in opposite directions are brought into contact and wound from the back side of the contact part, so that the resistors are mutually connected. Since there is no contact and the conductor portion is wound in two layers, the number of needle-shaped discharge electrodes can be increased without affecting the adjacent resistor, and the strength of the printed conductor portion is also increased. Furthermore, there is no need for a core conductor.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 6, the main body of the air purifier (
An intake port 22 and an exhaust port 23 are provided on the side of the main body 21, and a motor 25 for driving a fan 24 is built inside the main body 21. This motor 25 has support rubber 26
An air inlet 28 is sandwiched between the partition wall 27 and the main body 21 via an air path, and an air inlet 28 is formed above the fan 24 to communicate with the air inlet 22 via an air passage, and a swirl chamber 29 is formed around the air inlet 28 that communicates with the air outlet 23 at the side thereof. are doing.

Near the inlet 22 in the air flow path from the inlet 22 to the volute chamber 29, there is a needle-shaped discharge electrode 30 formed in a sawtooth shape, and a flat ground electrode opposite to the needle-shaped discharge electrode 30. A pre-filter 32 is provided on the upstream side of both electrodes 30 and 31, and a discharge device 33 is provided, and the dust charged by the discharge device 33 is collected in the air flow path on the downstream side of the discharge device 33. A dust collection electrode section 34 is provided. In the dust collecting electrode section 34, positive and negative flat plate electrodes are arranged alternately to form an electric field between the flat plate electrodes. Further, activated carbon 35 for deodorization is provided downstream of this dust collection electrode section 34, and a lid 36 is provided at the upper opening of the main body 21.
is provided via a gas-tight packing 37.

The discharge device 33 has a flat ground electrode 31 and a needle discharge electrode 30 at the end opposite to the flat ground electrode 31. The needle discharge electrode 30 is arranged on an insulating sheet 38. It is provided by forming one end of a band-shaped resistor 39 arranged by printing or the like into a V-shape. Then, as shown in FIG. 2, the other ends of the plurality of resistors 39 are connected to a core conductor 40 that becomes the core of the resistor 39, and an insulating sheet 38 is wound around the core conductor 40. The portion protrudes from the winding portion so that a high voltage is applied between the flat ground electrode 31 and the core conductor 40. Note that 41 is an adhesive tape for temporarily fixing the winding start of the insulating sheet 38 and the core conductor 40.

In the above configuration, when the air cleaner is operated, dust-containing air is taken in from the intake port 22, bulky dust such as cotton waste is removed by the pre-filter 32, and remaining fine dust is charged by the discharge device 33. The air is collected by the dust collecting electrode part 34 by the Coulomb force of the electric field of the dust collecting electrode part 34, deodorized by the deodorizing activated carbon 35, sucked into the swirl chamber 29 by the fan 24, and purified air from the exhaust port 23. This is how the air is blown.

In this way, the needle-shaped discharge electrode 30 and the resistor 39
By configuring on the insulating sheet 38, the resistor 39
Because the shape of the resistor 39 can be freely deformed,
Not only can the length of the winding be shortened, but also the length in the wind flow direction can be further shortened by winding the winding. In other words, the length of the discharge device 33 in the wind flow direction can be shortened. By shortening the discharge device 33, not only can the main body 1 be made smaller, lighter, and cheaper, but also the dust collection electrode portion 34 can be extended in the shortened portion of the discharge device 33, which improves dust collection. Efficiency can be improved.

Further, when the resistor 39 is disposed on the insulating sheet 38, when the passing wind speed is high, the insulating sheet 38 vibrates and the distance from the flat ground electrode 31 becomes short, causing abnormal discharge. Sometimes. As a result, there was not only a decrease in dust collection efficiency but also a risk of inducing a fire, but by using the core conductor 40, the insulating sheet 38 no longer vibrates, and it is stable without the above-mentioned fear of fire. can be driven.

Next, a second embodiment will be explained. Figure 1
As shown in the figure, the cross section of the core conductor 40 is made approximately rectangular,
The insulating sheet 38 is temporarily attached to the surface of the core conductor 40 with an adhesive tape 41 or the like, and wound along the core conductor 40 with the resistor 39 inside. Since it is most strongly pressed against the corner portion of the core conductor 40, conduction can be ensured without lifting up. That is, by bringing the resistor 39 and the core conductor 40 into contact with each other at the bent portions of the corner portions of the core conductor 40, conduction can be established without using a conductive adhesive, which is inexpensive and highly reliable. is obtained.

Further, a third embodiment will be explained using FIG. 2. That is, the other ends of the plurality of resistors 39 each having a needle discharge electrode 30 formed at one end are connected to a printed conductor 42 printed on an insulating sheet 38. The width of the printed conductor 42 in the winding direction is longer than the outer circumference of the core conductor 40 shown in FIG.

With this configuration, when the insulating sheet 38 is wound around the core conductor 40, the portion that comes into contact with the core conductor 40 is always covered with the printed conductor 42.
The part where the resistor 39 is wound will be on the back surface of the insulating sheet 38 during the next winding, and the resistor 39 and the core conductor 40 will not come into contact with each other. Therefore, variations in contact resistance due to assembly are eliminated, and stable resistance can be obtained.

In addition, in the unlikely event that the printed conductor 42 and the core conductor 4
Even if the contact area of 0 is partially disconnected or there is a contact failure due to the adhesive tape 41, the contact area between the printed conductor 42 and the core conductor 40 will be the same as that between the resistor 39 and the core conductor 40. 40, the entire area is no longer disconnected, and continuity is obtained through other unbroken parts, that is, contacting parts, improving reliability.

Furthermore, since the insulating sheet 38 is already present, the roundness of the corner around which the printed resistor 39 is wound is greater than when it is directly wound around the core conductor 40, and the contact surface is also flexible, making it easier to wrap around the resistor. There is little deterioration due to bending of 39, and stable resistance can be obtained, resulting in high reliability.

A fourth embodiment will be explained using FIG. 3. That is, on the side where the printed conductor 42 of the third embodiment is not connected to the resistor 39, a cloth-like sheet portion 38a consisting of only the insulating sheet 38 is provided, and this cloth-like sheet portion 3
The width of 8a in the winding direction is made shorter than the outer circumference of the core conductor 40. Here, the sum of the widths of the fabric-like sheet portion 38a and the printed conductor 42 is longer than the length of the outer circumference of the core conductor 40.

With this configuration, when the insulating sheet 38 is wound around the core conductor 40, the dough-like sheet portion 38a is first wound, and the dough-like sheet portion 38
Since the printed conductor 42 is wound before a rotates once, it comes into contact with the core conductor 40 and conduction is obtained. Furthermore, since the sum of the widths of the printed conductor 42 and the fabric-like sheet portion 38a is longer than the outer circumference of the core conductor 40, the printed conductor 42 overlaps the back surface of the insulating sheet 38, and the resistor 3
The portion where 9 is wound is always on the back surface of the insulating sheet 38. Therefore, the same effects as in the third embodiment can be obtained. That is, the same effect can be obtained with a portion of the printed conductor 42 having a smaller width than in the third embodiment, resulting in lower costs and improved reliability due to the reduction in the number of printed portions.

Next, a fifth embodiment will be explained using FIG. 4. That is, the printed conductors 42 of the two insulating sheets 38 having the printed conductors 42 described in the third embodiment are brought into contact with each other so that the needle-shaped discharge electrodes 30 of the resistor 39 protrude in opposite directions. Overlay, printed conductor 42
It is constructed by winding two insulating sheets 38 so as to overlap them, using the back surface portions where they are in contact as a winding core.

With this configuration, the two-ply portion of the insulating sheet 38 is placed on the winding core, and since the two-ply insulating sheet 38 is wound, the strength of the needle-shaped discharge electrode portion is increased. Even when the passing wind speed is high, it can withstand sufficiently without vibration. Therefore, the core conductor 40 serving as the core becomes unnecessary, making it possible to reduce the cost and weight. Particularly in the case of vehicle-mounted air cleaners, it is desirable and effective to make them lightweight.

Note that FIG. 5 shows a cross section of the core conductors 40a, 40b around which the insulating sheet 38 is wound, with the resistor 39 inside. is attached.

With this configuration, when the insulating sheet 38 is wound around the core conductors 40a, 40b, or during use, the printed conductor 42 or resistor 39 on the insulating sheet 38 can be used as the core conductor. The risk of wire breakage due to the corner edges of the winding surfaces of 40a and 40b can be further reduced.

[0037]

[Effects of the Invention] As is clear from the above embodiments, according to the first means of the present invention, the needle-shaped discharge electrode and the resistor are provided on an insulating sheet, and the resistor is brought into contact with the core conductor. By winding, the storage length of the resistor can be shortened, and the length in the wind flow direction can be shortened. Therefore, the length of the discharge device in the wind flow direction can be shortened. Therefore, the air purifier main body can be made smaller, lighter, and less expensive. Further, since the number of dust collection sections can be increased in the shortened portion of the discharge device, the dust collection efficiency can also be improved. Furthermore, compared to the conventional case where a resistor is disposed on an insulating sheet without being wound, abnormal discharge and a decrease in dust collection efficiency can be prevented.

Furthermore, when the insulating sheet is wound along the core conductor with the resistor inside, the resistor bends the corner portion formed on the winding surface of the core conductor. Since it is pressed most strongly at the corner portions, conduction can be established reliably at the corner portions, and conduction can be established between the resistor and the core conductor without using a conductive adhesive. Therefore, it becomes possible to manufacture it at low cost and with high reliability.

Furthermore, when the insulating sheet is wrapped around the core conductor by the third means, the part that comes into contact with the core conductor is always the printed conductor, and the part around which the resistor is wound is the back side of the insulating sheet. As a result, the resistor and the core conductor do not come into direct contact with each other, eliminating variations in contact resistance due to assembly, and making it possible to obtain stable resistance. In addition, in the event that the contact area between the printed conductor and the core conductor is partially disconnected, or even if a contact failure occurs partially due to insufficient temporary fixing of the adhesive tape, other unbroken areas or contact Reliability is improved because conduction can be obtained through the exposed parts. Furthermore, since there is an insulating sheet at the corner of the core conductor around which the resistor is wound, the roundness of the winding is greater than when it is directly wound around the core conductor, resulting in less deterioration due to bending of the resistor and stable resistance. can be obtained, making it highly reliable.

According to the fourth means, when the insulating sheet is wound around the core conductor, the dough-like sheet portion is wrapped first, and the printed conductor is wrapped around the core conductor before the dough-like sheet portion has rotated once. Since it contacts the conductor, electrical continuity with the core conductor can be obtained. Furthermore, since the sum of the widths of the printed conductor and the dough-like sheet portion is longer than the outer circumference of the core conductor, the printed conductor overlaps the insulating sheet, and the portion around which the resistor is wound is always on the insulating sheet. Therefore, the same effect as the third means can be obtained. That is, the same effect as the third means can be obtained with a smaller dimensional width of the printed conductor than the third means, resulting in lower costs and improved reliability due to the reduction in printed parts.

Furthermore, according to the fifth means, since the two overlapping parts of the insulating sheet are placed on the winding core and the two insulating sheets are overlapped and wound, the strength of the acicular discharge electrode part and the printed conductive part is increased. It can withstand high passing wind speeds without vibration. In addition, there is no need for a conductor as a winding core.
It can be made cheap and lightweight. Particularly in the case of vehicle-mounted air cleaners, it is desirable and effective to make them lightweight.

As described above, according to the present invention, it is possible to provide an air cleaner that is small, lightweight, high performance, inexpensive, and highly reliable.

[Brief explanation of the drawing]

[Fig. 1] (a) A plan view of a discharge electrode part of an air cleaner according to an embodiment of the present invention. (b) A cross-sectional view of the same discharge electrode part.

[Fig. 2] A plan view of the third embodiment of the discharge electrode section.

[Figure 3]
Fourth plan view of the discharge electrode section

[Fig. 4] Fifth plan view of the discharge electrode section

[Figure 5] Cross-sectional view of an example of a core conductor

[Fig. 6] Cross-sectional view of the air cleaner according to the present invention

[Figure 7] Cross-sectional view of a conventional air purifier

[Explanation of symbols]

21　Air purifier body 22 Intake port 23 Exhaust port 24 Fan 25 Motor 30　Acicular discharge electrode 31　Plant ground electrode 33 Discharge device (discharge device section) 34 Dust collection electrode part (dust collection part) 38 Insulation sheet 38a Fabric-like sheet part 39 Resistor 40, 40a, 40b Winding core conductor 42 Printed conductor

Claims (5)

[Claims] Claim 1: An air purifier body having an intake port and an exhaust port, and a fan driven by a motor installed inside, and a discharge device section provided in an air flow path formed inside the air purifier body. and a dust collecting section, the discharge device section is composed of a flat ground electrode, and a needle-shaped discharge electrode opposite to the flat ground electrode, and the needle-shaped discharge electrode is a resistor disposed on an insulating sheet. The other end of the resistor is connected to a core conductor, and the insulating sheet is wound around the core conductor, and the needle-shaped discharge electrode is connected to the winding part from the winding part. An air purifier in which a high voltage is applied between the planar ground electrode and the core conductor. 2. A corner portion is formed on the winding surface of the core conductor, and when winding the insulating sheet around the core conductor, the insulating sheet is wound along the core conductor with the resistor inside. 2. The air cleaner according to claim 1, wherein the resistor and the core conductor are brought into contact with each other at a bent portion of the corner portion. 3. A plurality of resistors are arranged on an insulating sheet, the other end of the resistor is connected to a printed conductor formed on the insulating sheet, and the width of the printed conductor in the winding direction is 2. The air cleaner according to claim 1, wherein the core conductor and the printed conductor are wound so as to be longer than the outer circumference of the core conductor so as to be in contact with each other. 4. A fabric-like sheet portion consisting only of an insulating sheet is extended on the side where the resistor is not connected to the printed conductor provided on the insulating sheet, and the width of this fabric-like sheet portion in the winding direction is set as the winding core. 4. The air cleaner according to claim 3, wherein the length is shorter than the outer circumference of the conductor, and the sum of the widths of the fabric-like sheet portion and the printed conductor is longer than the outer circumference of the core conductor. 5. An air purifier body having an intake port and an exhaust port, and a fan driven by a motor provided inside, and a discharge device section provided in an air flow path formed inside the air purifier body. and a dust collecting section, the discharge device section is composed of a flat ground electrode, and a needle-shaped discharge electrode facing the flat ground electrode, and the needle-shaped discharge electrode is a plurality of needle-shaped discharge electrodes arranged on an insulating sheet. The other end of the resistor is connected to a printed conductor formed on the insulating sheet, and the printed conductors of the two insulating sheets are brought into contact with each other to connect one end of the resistor. are stacked so that they protrude in opposite directions, and the contact portion of the printed conductor is wound from the back side to overlap the two insulating sheets, the needle-shaped discharge electrode is made to protrude from the wound portion, and the An air purifier that applies a high voltage between a flat ground electrode and the printed conductor.