JPH02160061A - Air cleaner - Google Patents

Abstract

PURPOSE:To enhance safety of an air cleaner by arranging a conductive member to the inner wall near to a joined part of the main bodies fitting a discharge electrode and connecting both the conductive member and the discharge electrode at continuity. CONSTITUTION:A discharge part consisting of both a discharge electrode 14 performing corona discharge and a discharge counter electrode 12 is internally provided to the upstream side of an air flow path incorporated in the main bodies 2, 3 made of a nonconductive member such as synthetic resin. Further a filter 4 for collecting dust charged by the discharge part is internally provided to the downstream side of this discharge part. Furthermore a conductive member 51 is provided to the inner wall near to the joined part 22 of main bodies 2, 3 fitting the discharge electrode 14. This conductive member 51 and the discharge counter electrode 12 are connected at continuity by a lead wire 32. Thereby the safety of an air cleaner is enhanced.

Description

[Detailed Description of the Invention] Industrial Application Field This invention is applied to air purifiers, and more specifically,
This invention relates to an improvement in an air purifier of one type of electric collector having a discharge section consisting of a concentric pole 1 and a concentric counter electrode for performing corona concentric discharge.

2. Description of the Related Art Conventionally, this type of air cleaner has a structure as shown in FIGS. 6 to 71. That is, a large number of intake holes 11
The front body 2 to which the front grille/L/1 having L is attached and the submerged body 3 are made of synthetic resin, and together form a box body to constitute the main body of the air cleaner. A pre-filter 4 for collecting relatively large dust is removably disposed in the immersion direction of the front grill A/1, and on the downstream side thereof, a removable pre-filter 4 is installed. Range 11) A discharge section consisting of a corona discharger and a 3° eccentric counter electrode is placed on the upstream side of the air flow path in the main body made of a non-conductive material such as synthetic resin, and a discharge section is placed on the downstream side of this discharge section. A conductive member is provided on the inner wall near the mating part of the main body to which the electric discharger is attached, and this conductive member and the uncircumcised counter electrode An air purifier consisting of a conductive connection.

(2) The air cleaner according to claim 1, wherein the conductive member is coated with conductive coating.

@) A pre-filter is disposed on the upstream side of the air flow inside the main body made of a non-conductive material such as synthetic resin, and a discharge section consisting of a discharge basket for performing corona discharge and a discharge counter electrode is disposed on the downstream side, respectively.
On the downstream side of this discharge section, a filter for collecting dust accumulated in this discharge section is installed, and an electric filter 6 of about 105 to 1080 is disposed. An exhaust port 6 and a switch section 7 are arranged at the top of the main body. On the other hand, inside the main body, a thin chamber 9 is defined via a partition member 8, and a fan 11 directly connected to a drive motor 10 is housed. The thin chamber 9 communicates with the upstream side of the air flow path through the suction hole 8a of the partition wall member 8, and also communicates with the exhaust port 6 on the downstream side 1d. A discharge counter electrode member 12 made of a strong conductive material such as heavy galvanized steel is arranged between the filter 6 and the pre-filter 4 which are arranged on the upstream side of the fan 11.

In the discharge pair distortion, an opening 13 is formed by cutting and raising the flange 12& of the member 12, and a discharge electrode 14 made of a thin tungsten wire or the like is stretched between the openings 13, facing the flange 121L. . A DC high voltage of 6 to aKV is continuously applied between the discharge electrode 14 and the open-air pair 121L from a high-voltage power source (not shown) to cause corona discharge between the two electrodes. The fine dust that has passed through the pre-filter 4 is ionized in this corona discharge region and is electrically adsorbed by the static electricity filter 15 of the filter 6. Note 1 Normal release i
[414] is set to a positive potential, so that fine dust is bombarded with positive ions due to corona discharge, and is attracted to the static filter 16 having a negative potential.

In addition, the filter 6 is equipped with a deodorizing filter 16 that eliminates at least one odor along with the static electricity filter 15, which removes foul-smelling gases as well as dust from the air, and directs the purified clean air into the room from the exhaust port 6. reflux to. Reference numeral 2a is a portion of a single cover formed on the front body 2 to prevent the discharge electrode 14 from becoming dirty. The discharge electrode 14 is suspended by a tension spring 18 on a support fitting 17 disposed in the recess 2b of the front body 2, and a high voltage is supplied from a high-voltage power source (not shown) through the support fitting 17. be done. Reference numeral 19 denotes an insulating tube that is attached to the engagement portion of the discharge electrode 14 with the tension spring 18.

Problems to be Solved by the Invention Now, the filter 6 disposed on the downstream side of the discharge 114 has a static electricity filter 16 and a deodorizing filter 16 supported by a case body 19.20. However, the opposing ribs 20 of the front body 2, the ribs sb of the partition wall 8, and the ribs 8
A gap inevitably occurs between the case body 19.c and the case body 15. In addition to the main flow that passes through the deodorizing filter 16, a branch flow that passes through this gap is generated. On the other hand, it is difficult to eliminate the gaps in the joint part 21 between the spaced apart rib 8o and the opposing rib 2d, and the joint part 22 between the front body 2 and the rear body 3 due to dimensional variations, deformation, warping, etc. of the members. A cutout 26.2f for inserting the insulating tube 19 is added to form an air flow path for sucking dirty air from outside the main body. When the dust collecting filter 16 becomes clogged and its ventilation resistance increases, the divided flow increases, and this divided flow increases the air flow in the air flow path from the joining portion 22. Due to this busy air flow, the inner wall surface 2g of the front body 2 gradually becomes dirty. The surface electrical resistance of the front body 20 made of synthetic resin is usually 1o13.
It is about Ω and has a cannon rim.

When the surface electrical resistance decreases to 108 ΩaK due to dirt, a potential is induced in the mating part 22 through the support metal fitting 1T, and if a human body were to touch the mating part 22 and intervene between the ground of the pond, this potential would cause an electric potential. You will be shocked. This electric shock is a minute current of several micrometers, so it does not damage the human body, but it is undesirable.The present invention eliminates these conventional problems and improves the safety of air purifiers. The purpose is to

Means for Solving the Problems In order to achieve the above object, the present invention has a configuration in which a conductive member is arranged on the inner wall near the joint of the main body to which the discharge electrode is attached, and the conductive member and the discharge pair are electrically connected. It is.

Function In the air cleaner of the present invention configured as described above, even if the member to which the discharge electrode is attached becomes dirty and the electrical resistance decreases, a conductive member is placed on the inner wall near the joint, and the conduction is carried out by the member. Since the electrode is connected to the discharge counter electrode, that is, the earth electrode, the potential does not reach the outside of the main body, thereby eliminating the possibility of receiving an electric shock.

Example Embodiments of the present invention will be described below with reference to FIG.

In FIG. 1, parts that are the same as those in the conventional example are designated by the same reference numerals, and a description thereof will be omitted. In the figure, on the inner wall near the joint 22 between the front body 2 and the rear body 3.

A conductive member 31 made of a conductive metal member is attached to the lip 2 of the front body 2.
b, sandwiched between the lip 8d of the partition wall 8, and further connected to the discharge counter electrode 12 by a lead wire 32. 33 is a screw for fixing the lead wire 32. Because the conductive member 31 is arranged in this way.

The high potential from the supporting metal fitting 17 that stretches the discharge electrode 14 passes through the internal surface 2C of the main body 2, which is gradually contaminated, before reaching the joint 22, and is then transferred by the conductive member 31 to the discharge counter electrode 12. That is, it is led to the ground pole, and therefore no potential is induced in the junction 22. In addition, when the support metal fitting 17 of the discharge electrode 14 is attached and arranged on the front grill side of the front body 2 or on the inner surface of the front grill /v1, the potential induced from the discharge electrode is between the front body 2 and the front grill /L/v1. In order to eliminate this problem, the conductive member 31 may be placed on the inner surface near the joint 34. Furthermore, if it is difficult to extend the conductive member 31 to the inner surface of the joint portions 22 and 34, it can be easily done by applying a conductive varnish coating.

Next, another embodiment of the present invention will be described with reference to FIGS. 2-4.

In the figure, a front body 41 and a rear body 42 form a box-shaped body. Inlet ports 43 are provided on both sides of the front body 41. Non air at the top 44. A switch section 46 is arranged at the upper right corner. Further, on the downstream side of the passage leading from the intake port 43 to the exhaust port 44, a filter 46 that can be attached and removed downward is provided on the upstream side, and furthermore, a pre-filter 47 is provided located on the inner surface of the intake port 43. A thin chamber 49 for a fan (not shown) is defined between the front wood 41 and the rear main body 42 via a partition wall 48 . The downstream side of the thin chamber 49 communicates with the exhaust port 44, and the upstream side communicates with the intake port 43. The filter 46 includes a dust collecting filter 62 and a deodorizing filter 63 housed in a case body 60.51. 64 is held and fixed by the protruding piece 41& formed on the inner surface of the front body 41, the support portion 41b, and the lip 48a1 of the partition wall 48 due to the weight of the discharge pair.

Reference numeral 66 denotes a holding member made of a breakable member that is broken and attached to the discharge electrode 66, and is separated by a protruding piece 410 protruding from the inner surface of the front body 41, and is secured and held by a locking protruding piece 4111. The discharge needles 66 are pointed discharge needles that protrude from the holding member 66 at a plurality of locations, and are arranged to face each other between the discharge counter electrodes 64. This discharge electrode 66 is used as an anode, and the counter electrode 64 is used as a negative discharge, and a DC high voltage of 6 to aKV is applied to generate a corona discharge. From the intake port 43 to the pre-filter 47 net 471
Relatively large dust particles are filtered at L, and then, when passing through the corona discharge area, they are bombarded with positive ions and charged with a positive charge, and are electrically adsorbed and collected by the downstream dust collection filter 62, which is charged with a negative charge. be done. The pre-filter 47 is removably attached using the lip 41 of the front body 41 and the lip 48b of the %1 moat 48 as guide lips. 67
is a short-circuiting member made of a synthetic resin that contains a conductive material, has an electrical resistance of about 105 to 1080, is non-conductive under commercial voltage, and conductive under high voltage, and has a planar shape of The busy setting is shown in Figure 3. That is, one end 671 part is engaged with the discharge counter electrode 64 and the partition lip 4
It is held and fixed with 81L.

The other end flexible portion 57b is arranged so as to be able to come into elastic sliding contact with the prefilter 47 or the net 47&. The pre-filter 47 has an electrical resistance of about 105 to 1080 and is formed by incorporating a conductive member made of conductive fibers into the net 471L. is arranged in the main stream into which the air is drawn, and the intake port 43
The rib 41C1 of the front body 41, the locking protrusion 41 (1), the lip 41, and the pre-filter 4
Dirt on the inner surface of the front body 41 tends to adhere to the inner surface of the front body 41. However, the flexible portion syb of the short-circuiting member 57 is arranged to be in sliding contact with the pre-filter 47 and the net 47&, and the other end is connected to the negative discharge counter electrode 64. In other words, since it is connected to the ground pole, there is no connection from the discharge electrode 66 to the front body 41 to the prefilter 47.
When a high potential is generated due to a decrease in surface resistance due to dirt through the inner surface of the pre-filter 47, the shorting member 67 becomes conductive at a high potential and short-circuits with the discharge counter electrode 64. will not cause any electrical shock. In addition, the shorting member 67, the pre-filter 47, and the 471
L does not become a non-charged metal part exposed when viewed from the intake port 43, and has a safe configuration.

A detailed description of the invention was provided. According to the air cleaner of the present invention, even if the member to which the discharge electrode is attached becomes dirty and the electrical resistance decreases, the conductive member and the discharge counter electrode arranged on the inner wall near the joint with the mating body member, That is, the ground electrode is connected to the ground electrode, and a pre-filter placed inside the intake port near the discharge electrode is formed by incorporating a conductive member, and the difference between this pre-filter and the discharge counter electrode, that is, the earth electrode, is about 105 to 10 aΩ. By connecting with a shorting member made of synthetic resin with a low electrical resistance of .

The potential induced from the discharge electrode does not reach the outside of the main body, the pre-filter, etc., thereby eliminating the possibility of receiving electrical shock.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing an embodiment of the present invention, FIGS. 2 to 4 show other embodiments, FIG. 2 is a sectional view taken along line BB in FIG. 4, and FIG. 2nd cause C-C arrow view, Figure 4 is a front view,
FIG. 6 is a sectional view of a main part showing a conventional example, FIG. 6 is a combined sectional view, and FIG. 7 is an overall perspective view. 2.41...Front body, 3.42...Rear body, 4.47...Prefilter-15,46
......Filter, 12&, 54...Discharge counter electrode, 14.56...Discharge electrode, 22...
...Joint portion, 31... Conductive member. 67... Short circuit member, 67b... Burnable part. Name of agent: Patent attorney Shigetaka Awano and 1 other person2-
One diarrhea book, 1 mi 3-m-f? ,) f fu4 --- Bushi 74 tt ter 14 -- Kazutomo Derrihan 41- Katagiri Fu 42- Saibai rate $ 4E-FIL Ku jealousy 47 --- 7 "L Metsu 4/L Tata Daa - On the other hand begging 57b - 吒口? 57- 57b - 1,000 Challenges

Claims (3)

[Claims] (1) A discharge section consisting of a discharge electrode that performs corona discharge and a discharge counter electrode is installed on the upstream side of the air flow path in the main body made of a non-conductive material such as synthetic resin, and a discharge section consisting of a discharge electrode that performs corona discharge and a discharge counter electrode is installed on the downstream side of this discharge section. The air cleaner is provided with a filter for collecting accumulated dust, a conductive member is provided on the inner wall near the joint of the main body to which the discharge electrode is attached, and the conductive member and the discharge counter electrode are electrically connected. Machine. (2) The air cleaner according to claim 1, wherein the conductive member is coated with conductive coating. (3) A discharge section consisting of a discharge electrode that performs corona discharge and a discharge counter electrode is disposed on the upstream side of the air flow path in the main body made of a non-conductive material such as synthetic resin, and a pre-filter is disposed downstream. A filter is installed on the downstream side of the discharge part to collect the dust accumulated from this discharge part, and the resistance is 10^5 to 10^8Ω.
One end of the short-circuiting member made of a synthetic resin having a certain electrical resistance is fixedly supported on the discharge counter electrode, and the flexible part of the other end is fixed to 10^.
An air purifier made of a pre-filter made of synthetic resin having an electrical resistance of about 5 to 10^8 ohms, which is slidably abutted.