JP3246070B2 - Air purifier including electric dust collector having disposable dust collecting electrode sheet and fan heater including the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier equipped with an electric precipitator having a disposable dust collecting electrode, which is suitable for use in a home air purifier, an air conditioner, and the like, and further includes the air purifier. Regarding fan heater.
An electrostatic precipitator air cleaning apparatus of the present invention is particularly, disposable sheets dust suction part of the dust collection electrode has been pasted, cleaning is a simple structure.

[0002]

2. Description of the Related Art The prior art will be described by taking an air purifying device for general households as an example. In recent years, in general homes, the airtightness of rooms has led to the contamination of indoor air due to airborne dust and smoke from tobacco, and the rise of indoor humidity due to insufficient ventilation. The problem of occurrence has arisen. As a countermeasure, air purifiers that can remove airborne dust and smoke from indoors are widely used in general homes.

In recent years, fan heaters using kerosene or city gas as fuel have a convection fan and generate dust due to wind. Devices are being provided.

An electric precipitator used in such an air purifier applies a high voltage between a discharge electrode and a precipitating electrode (a precipitating electrode) to generate a corona discharge between the two electrodes. To form a charge band. Then, the processing gas is caused to flow through the charging zone to charge the dust contained in the processing gas, and the charged dust is sucked and collected by the dust collecting portion having the opposite potential.

[0005] As this type of conventional air purifier, those shown in Figs. 4, 5 and 6 are used. FIG.
FIG. 2 is a cross-sectional view illustrating an outline of an air cleaning device (parallel plate type) having dust collection plates provided in parallel along an air flow path.
FIG. 5 is a perspective view of a fan heater having the air cleaning device of FIG. 4, showing a state in which a prefilter and a dust collecting plate for electric dust collection are removed.

[0006] In FIG. 4, the air cleaning device 100 is mainly composed of a pre-filter 101 and an electrostatic precipitator 102. As the pre-filter 101, a wire mesh filter of about 30 mesh is generally used. In some cases, a resin filter having a finer mesh may be used. The electric dust collector 102 includes the dust collecting plate 10.
3 and a discharge electrode 105. The discharge electrode 105 is electrically grounded, and a negative voltage is applied to the dust collecting plate 103.

[0007] The dust collecting plate 103 is formed of a plurality of flat plates provided in parallel with the air flow path as a whole. The discharge electrode 105 is formed of a wire-like metal wire, and is located substantially at the center between the flat plates of the dust collecting plate 103. Corona discharge is formed between the discharge electrode 105 and the dust collecting plate 103 during operation of the air cleaning device.

First, large particles of dust and cotton dust are removed from the air absorbed by the air cleaning apparatus 100 of FIG. Next, the electric dust collector 10
2 collects dust and smoke having a small particle size.

FIG. 6 is a cross-sectional view showing an air cleaning apparatus (Japanese Patent Laid-Open No. 55-22390) in which a dust collecting side ground electrode plate provided with a filter is provided downstream of the discharge electrode. Reference numeral 121 denotes a main body casing of the air cleaning device, and a cabinet 122.
And a front panel 123, which is usually installed at a relatively high place such as a wall. 124 is the front panel 12
3, air inlets formed in a grid pattern on the entire front surface
Is an air outlet formed on the upper surface of the cabinet 122. Reference numeral 126 denotes a blower comprising a sirocco fan installed in the cabinet 122, and 127 denotes the blower 1
A fan motor 128 drives the fan 26, and a fan casing 128 covers a front surface of the blower 126, and an opening 129 for forming an air passage is provided in the center of the fan casing.

Reference numeral 130 denotes a net-shaped prefilter disposed inside the air suction port 124, and 131 denotes an air suction port 1.
A discharge-side ground electrode plate 132 disposed close to the reference numeral 24 is a discharge line stretched between the discharge-side ground electrode plates 131. 13
Reference numeral 3 denotes a filter case removably mounted in the main body casing 121, in which a dust collecting filter 134, a deodorizing filter 135, and a dust collecting side ground electrode plate 13 are provided.
6 are stored in a stacked state.

The operation of this air purifying device is as follows. When the blower 126 is rotated, first, after the large dust in the indoor air is removed by the pre-filter 130,
Dust and dust particles in the indoor air are charged when passing through the ionization region formed by the discharge line 132 and the discharge-side ground electrode plate 131, are captured by the dust collection filter 134, and have the opposite polarity. It is attracted to the dust collecting side ground electrode plate 136. The odor components in the indoor air are removed by the deodorizing filter 13.
5 to be removed. Then, the air after dust collection and deodorization is blown into the room from the air outlet 125, and the room air is cleaned by repeating the circulation cleaning operation.

[0012]

The conventional parallel plate type air cleaning apparatus has the following problems. It was troublesome to remove dust and dirt accumulated on the dust collecting plate of the electric dust collector with a vacuum cleaner or washing with water. Large particle size dust and cotton dust are collected by the pre-filter, and fine particle size dust and smoke are collected by the dust collecting plate of the electric dust collector, but small to medium particle size (for example, 3 to 100 μm) dust. Some of the dust and dirt was not collected, and some of the dust flowed out of the aircraft. Therefore, the cleanliness of indoor air may not be sufficient.

In particular, in a fan heater, the above-mentioned portion with uncollected dust mainly adheres to the inside of a fan or a burner. Therefore, it has been a factor of causing the fan heater to deteriorate over time. For example, if dust adheres to the fan, the performance of the fan deteriorates and the amount of air blow decreases. For this reason, the required air volume could not be obtained, and the temperature of the heater part was too high, and the safety device was sometimes activated. Since dust and dirt accumulate in two places, the pre-filter and the dust collecting plate, it is necessary to separately clean both when cleaning (vacuum or washing) the air purifier. Since the pre-filter and the dust collecting plate had separate structures, the structure was complicated and the apparatus was expensive and large.

The air purifying apparatus disclosed in Japanese Patent Application Laid-Open No. 55-22390 also has the above-mentioned problems.

[0015] The present invention is basically intended to provide a dirty air cleaning device and fan heater Ru equipped with easy-to-clean electrostatic precipitator to remove the dust collection unit. Furthermore, in the air purifying apparatus and the fan heater provided with the electric precipitator of the specific embodiment of the present invention, the following objects are also intended to be achieved. Despite its simple structure, it can remove dust, dust, smoke, mist, etc. in various forms and dimensions. It can be compact and inexpensive. It is possible to reduce residual dust in the equipment such as a fan heater and an air conditioner, prevent troubles of such equipment, and improve performance, quality and serviceability.

[0016]

In order to solve the above-mentioned problems, an air purifying apparatus according to the present invention comprises: a dust collecting plate arranged to cross an air flow passage; and an air flow passage of the dust collecting plate. a discharge electrode provided on the downstream side, the electric dust collector having a
Comprising an air cleaning apparatus; Atsumarichiriban consists a porous dust collection plate body, and adhered Ri Tagged conductive disposable sheet to an air flow path downstream of the dust collecting plate body, the disposable sheet There are formed a dust collection electrode, is subjected to an electrostatic precipitator by generating a corona discharge between the discharge electrode and the dust collection electrode, the dust collecting plate body mechanical filtration function
Characterized in that it is a filter having

[0017]

[Action] is a region between the Ri attached its dependent disposable sheet and discharge electrodes bonded to the dust collection electrode corona discharge is formed, dust in the gas passing through the same region are oppositely charged potential and the dust collection electrode You. The dust is attracted to the dust collecting electrode by the Coulomb force and accumulates on the dust collecting electrode surface. If the dust accumulates to a certain degree or more, the dust collecting performance is reduced, so that the dirt on the surface of the dust collecting electrode must be removed. At this time, dirt can be easily removed by peeling off one surface disposable sheet. Disposable sheets can leave pasted several sheets, if necessary, by stripping one after another disposable sheet in a certain operation period, without taking the trouble of cleaning the dust collection electrode, the dust collection efficiency Good driving can be continued.

[0018]

Further , since the dust collector can be formed densely crossing the air passage , dust can be collected efficiently. Also,
Since the main body of the dust collecting plate can be formed into a single plate, the disposable sheet to be stretched on the dust collecting plate can also be formed as a single sheet. At the time of cleaning, if this sheet is peeled off, the dirt on the dust collecting electrode can be removed, so that it is even easier.

Furthermore, by a filter having a mechanical filtration function of the dust collecting plate body, in particular thus to integrate the electrostatic precipitator and a mechanical filter, various forms,
It can remove dust, dust and mist of dimensions, and is useful as an air cleaning device for general household use.

In this air cleaning apparatus, large-sized dust is mechanically filtered upstream of or inside a dust collecting plate made of a porous structure. Here, the mechanical filtration action is as follows: the dust particles adhere to the dust collecting plate structure due to inertial collision (inertial action), the dust particles adhere to the dust collecting plate structure (interruption action), and the dust accompanying the Brownian motion ( (Diffusion).

Medium and small dust, smoke and mist are charged to the same polarity as the discharge electrode in the corona discharge area formed downstream of the dust collecting plate, and are attracted to the dust collecting side electrode formed on the dust collecting plate. Is done. Here, since the dust collecting side electrode can be densely formed crossing the air flow path, dust can be collected more efficiently as compared with the parallel plate type electric dust collecting. Further, in the air purifying apparatus of the present invention, dust removal is performed by two different mechanisms of physical filtration and electric dust collection at one place of the dust collecting plate. Therefore, the structure becomes compact.

In the present invention, the dust collecting plate is not limited to a so-called plate-shaped one, but may be a box-shaped, pipe-shaped, laminated,
It may be in the form of granules or films. The porous structure constituting the dust collecting plate may be a wire mesh, a woven fabric, a nonwoven fabric, a sintered body of a metal, ceramic, or organic substance. The porous structure may be entirely formed of conductive metal, carbon, or the like. Further, a conductive plate (metal plate or the like) may be provided on the downstream side of the air flow path of the main body of the dust collecting plate made of a non-conductive porous body.

[0024] In the air cleaning apparatus of the present invention, the dust collecting plate, a filter provided in substantially front row of the air flow path (prefilter) der Turkey and are preferred. This is because there is no need for labor since only one cleaning is required.
Further, the structure of the entire air cleaning device can be made compact.
Here, “substantially provided in the front row” means that a filter (for example, 30 mesh or more) that substantially performs the dust removing action is provided in the front row of the air flow path. In addition, the dust collecting plate
And integrated with pre-filter
-The present invention also includes one that enables cleaning.

In the fan heater, both air for convection and air for combustion are sucked. Conventionally, due to the difference in required dust removal characteristics, a separate filter has been often used for convection air and combustion air. However, the air purifying device of the present invention has a simple structure, but can remove dusts and the like of various forms and dimensions by one unit, so that it can be used as both air filters.

[0026]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
1 is a side sectional view showing an outline of an internal structure of a fan heater having an air cleaning device according to one embodiment of the present invention. FIG.
FIG. 2 is a diagram illustrating a dust collecting plate of the air cleaning device of FIG. 1.
(A) is a front view, (B) is a side view. In FIG. 1, a fan heater 1 is provided with an air suction port 10 on the left side surface over the upper and lower sides, from which air is sucked. The sucked air passes through an air cleaning device including the dust collecting plate 11 and the discharge electrode 20, is heated by the gas burner 45, and is heated by the fan 49.
Air is blown into the room from the air outlet 50.

In this embodiment, the dust collecting plate 11 is arranged so as to cross the air flow path. Dust collecting plate 11
Is made of a 0.8 mm thick stainless steel plate having many holes. The lower end of the dust collecting plate 11 is supported by an electrically insulated lower support 15. The upper end of the dust collecting plate 11 is slightly bent. This is to make it easier to pick up the dust collecting plate when pulling the dust collecting plate upward to clean the dust collecting plate. A handle or the like may be attached to this portion. Dust collecting plate 11
The upper end of the upper support 1
3 support it so as to be sandwiched in the left-right direction of FIG. In addition, the support 13 is also electrically insulated. The dust collecting plate 11 is connected to the + side of the power supply 17 and receives a voltage of about 5 KV.

On the inner surface (downstream of the air flow path) of the dust collecting plate 11, a plurality of disposable sheets 12 (for example, one
0 sheets) are Ri stuck. Details of the dust collecting plate 11 are shown in FIG. The dust collecting plate 11 is a stainless steel plate having a thickness of 0.8 mm, and is 450 mm wide and 230 mm high.
In this plate, a large number of holes 63 having a diameter of 5 mm are formed at a pitch of 7 mm, and the aperture ratio is 39.3%. The disposable sheet 12 is a 0.05 mm thick stainless steel foil,
Many holes are formed like the dust collecting plate 11.

The disposable sheet 12 is attached to the dust collecting plate 11
How paste it in is not particularly limited, a conductive adhesive (those not very strong adhesive strength) available methods, a method using a magnetic force, a method in which mechanical stop using.

The discharge electrode 20 is composed of a number of discharge electrode plates 21 extending vertically. A large number of discharge electrode plates 21 are arranged in a direction perpendicular to the paper surface of FIG. 1, and FIG. 3 shows a state of the discharge electrode plate 21 viewed from the front of the air inlet 10. That is, a large number of electrode plates 21 extending in the vertical direction are arranged between the upper bar 25 and the lower bar 27.

The end of the discharge electrode plate 21 on the dust collection plate 11 side is formed in a wave shape having a number of sharp peaks. Each of these peaks is a discharge electrode projection 23, and forms a corona discharge with the dust collecting plate 11. The discharge electrode 20 is electrically grounded, and is electrically negative in relation to the dust collecting plate to which the + voltage is applied. Discharge electrode 2 of this embodiment
0 is 198 mm long, 425 mm wide, and discharge electrode plate 2
The number of the electrode projections 23 is 10 mm, and the interval between the tip of the electrode projections 23 and the dust collecting plate 11 is 12 mm. The material of each part is stainless steel.

A dust receiver 31 is provided below the dust collecting plate 11 and the discharge electrode 20. The dust receiver 31 has a shape of a rain gutter, and dust (electrically dust-collected dust) attached to the inner surface of the dust collecting plate 11 falls down and accumulates. A cleaning port (not shown) for opening a frame of the fan heater is provided at a lateral end of the dust receptacle 31, from which a vacuum of the vacuum cleaner can be inserted for cleaning. Has become.

The air cleaned by the air purifier separates into a convection air passage 41 and a combustion air passage 43 and proceeds. The air that has entered the combustion air passage 43 is supplied to each part of the gas burner 45 and used for gas combustion. The air entering the convection air passage 41 is indirectly and directly heated by the flame of the gas burner. The two airs join in the hot air flow path 47 and reach about 70
It becomes an air flow of ℃ 100 ° C. The hot air is sucked by the fan 49 (such as a line flow fan), and
0 to be supplied indoors.

FIG. 4 is a sectional view showing the structure of a dust collecting plate having a wire mesh filter according to another embodiment of the present invention.
The dust collecting plate 71 and the disposable sheet 72 are the same as those in the embodiment of FIG. The air flow upstream of Atsumarichiriban 71, 30 stainless wire mesh filter 75 of the mesh is pasted to one surface. The wire mesh filter 75 performs mechanical filtration (mainly removing large dust and dust) of the suction air. A resin nonwoven fabric filter or the like may be used instead of the wire mesh filter.

[0035]

As is apparent from the above description, the present invention
The fan heater with air purifier and it exhibits the following effects. Cleaning is easy because it is only necessary to remove the disposable sheet when removing accumulated dust. Since the dust collecting side electrode can be densely arranged to cross in the air flow path, even though the structure is simple, it can be efficiently removed various forms and dimensions of dust, dirt, smoke, mist or the like. Further, since a combination of mechanical filtration and electrostatic precipitation, further excellent ability to remove such dust.

Since both the mechanical filtration and the electric dust collection are performed by the dust collecting plate, it is easier to clean the dust accumulation portion as compared with the case where each of them is configured separately. Since the filter structure is simple, the structure of the air purifying device can be made compact, and the cost of the air purifying device can be reduced. Accordingly, it is possible to reduce residual dust in the device such as a fan heater or an air conditioner in which the air purifying device is installed, prevent troubles of such devices, and improve performance, quality, and serviceability.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an outline of an internal structure of a fan heater having an air cleaning device according to one embodiment of the present invention.

FIG. 2 is a diagram showing a dust collecting electrode plate of the air cleaning device of FIG. (A) is a front view, (B) is a side view.

FIG. 3 is a front view showing a discharge electrode of the air cleaning device of FIG. 1;

FIG. 4 is a cross-sectional view illustrating a structure of a dust collecting plate having a wire mesh filter according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view showing an outline of an air cleaning device (parallel plate type) having a dust collecting plate provided in parallel along an air flow path.

FIG. 6 is a perspective view of a fan heater having the air cleaning device of FIG. 4, showing a state where a pre-filter and a dust collecting plate for electric dust collection are removed.

FIG. 7 shows an air purifying apparatus provided with a dust collecting side ground plate in front of a filter on the downstream side of a discharge electrode (JP-A-55-223).
90) is a sectional view showing (90).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fan heater 47 Hot air flow path 10 Air inlet 49 Fan 11 Dust collecting plate 50 Air outlet 12 Disposable sheet 63 Hole 13 Upper support 71 Dust collecting plate 15 Lower support 72 Disposable sheet 17 Power supply 75 Wire mesh filter 20 Discharge electrode 100 Air purification Device 21 Discharge electrode plate 101 Pre-filter 23 Discharge electrode protrusion 102 Electric precipitator 25 Upper lever 103 Dust collection plate 27 Lower lever 105 Discharge electrode 31 Dust pan 110 Fan heater 33 Lower body frame 130 Pre-filter 35 Upper body frame 131 Ground electrode Plate 41 Convection air flow path 132 Discharge electrode 43 Fuel air flow path 134 Filter 45 Gas burner

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FIF24C 1/14 B03C 3/14 A (56) References JP-A-2-203132 (JP, A) JP-A-1-305256 ( JP, A) Japanese Utility Model Showa 59-150439 (JP, U) Japanese Utility Model Hei 3-124159 (JP, U) Japanese Utility Model Showa 48-97776 (JP, U) Japanese Utility Model Showa 62-140952 (JP, U) Showa 41-18629 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B03C 3/00-3/88

Claims (3)

(57) [Claims] 1. An air cleaner provided with an electric precipitator comprising: a dust collecting plate arranged to cross an air flow path; and a discharge electrode provided downstream of the dust collecting plate in the air flow path. Dress
A location; Atsumarichiriban consists a porous dust collection plate body, and adhered Ri Tagged conductive disposable sheet to an air flow path downstream of the dust collecting plate body, the disposable sheet dust collection forming a pole, is subjected to an electrostatic precipitator by generating a corona discharge between the discharge electrode and the dust collection electrode, the dust collecting plate body with a filter having a mechanical filtration function
Disposable dust collection electrode sheet
Air purifier equipped with an electric dust collector. 2. The filter (pre-filter) , wherein the dust collecting plate is provided substantially at the front row in the air flow path.
The air purifying device according to claim 1 . 3. An air purifying apparatus according to claim 1 or 2,
In addition, this air purifying device is a fan heater that doubles as a filter for convection air and burner combustion air.