JPH10180137A - Air cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner for replacing a dust collection paper simply and cleaning a prefilter and a discharge electrode easily. SOLUTION: A front cover 19 with an air suction hole is fitted removably on a front case 2 and high voltage is applied between a discharge wire 31 fitted on the front cover 19 and a counter electrode 32 provided in the front case 2 to generate the discharge, and ionic air is generated by the discharge to electrify dust in atmosphere sucked from the suction hole and the dust is removed by a dust collection paper 74 attached to the counter electrode 32 and then exhausted. A press plate 75 for pressing the upper end of the dust collection paper 74 to the side of the counter electrode 32 is provided on the front case 2, while a press section 100 for pressing the lower end of the dust collection paper when the front cover is fitted on the front case 2 is provided on the front cover 19. The end of the dust collection paper is just pressed by the press plate, and as the lower end of the dust collection paper is pressed simultaneously to the side of the container electrode 32 by the press section 100, the dust collection paper can be attached simply along the counter electrode 32 when the front cover 19 is fitted on the front case 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifier for purifying air at home or the like.

[0002]

2. Description of the Related Art Conventionally, a cover having an intake hole is detachably mounted on a main body case, and a high voltage is applied between a discharge electrode provided in the cover and a counter electrode provided on the main body case to discharge. This discharge generates ionic wind to charge the dust in the outside air sucked from the intake hole provided in the cover, and removes the dust with a dust collector attached to the counter electrode, and then exhausts the dust. An air purifier is known, for example, from Japanese Utility Model Publication No. 2-43495.

[0003] In this type of air purifier, the dust collection paper must be replaced frequently (once per month). Therefore, it is important to easily replace the dust collection paper. On the opposite electrode, or by being inserted into an engaging portion provided at an appropriate position in the surrounding area. Therefore, replacement of dust collection paper was troublesome.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air purifier in which dust paper can be easily replaced. Another object of the present invention is to provide an air purifier that can easily clean the pre-filter and the discharge electrode when the dust collection paper is replaced.

[0005]

According to the present invention, a cover having an intake hole is detachably mounted on a main body case, and a cover is provided between a discharge electrode disposed in the cover and a counter electrode provided on the main body case. A voltage is applied to generate a discharge, and the discharge generates an ionic wind to charge the dust in the outside air sucked from the intake hole, and removes the dust with a dust collector attached to the counter electrode, and then exhausts the dust. In the air purifier, the main body case is provided with a pressing plate for pressing one end side of the dust collection paper toward the counter electrode side, and the cover presses the other end side of the dust collection paper when the cover is attached to the main body case. The holding part is formed.

[0006] With this configuration, the dust-collecting paper is only pressed at one end by the pressing plate, and at the same time when the cover is mounted on the main body case, the other end is pressed toward the opposing electrode by the pressing portion formed on the cover. The dust collecting paper can be attached along the counter electrode.

If one end of the dust-collecting paper is set to the upper side and the other end is set to the lower side, the dust-collecting paper hangs down by its own weight by holding the upper side with the pressing plate. There is no need to expand the size, and workability can be improved.

Further, the holding plate is rotatably supported on the main body case, and is biased by a biasing means so as to rotate toward the counter electrode, so that one end of the dust collecting paper rotates the holding plate. By doing so, it can be easily held by the holding plate or removed from the holding plate.

In addition, by providing the pre-filter and the discharge electrode for covering the intake hole in the cover in a detachable manner, the pre-filter and the discharge electrode can be easily cleaned when the cover is removed and the dust collecting paper is replaced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes an air purifier main body case, which includes a front case 2 and a rear case 3. In the upper center of the front case 2,
The decorative board 4 is mounted. Reference numeral 5 denotes a middle frame mounted so as to partition the inside of the main body case 1 back and forth, and an electric motor 6 is mounted at the center of the middle frame 5. A vent hole 7 is provided in the middle frame 5 around the electric motor 6. A fan 8 rotated by a motor 6 is provided in a space behind the middle frame 5 in the main body case.

A peripheral wall 10 of a spiral fan case 9 surrounding the fan 8 is formed in the middle frame 5 and the rear case 3. The upper part of the fan case 9 is opened to serve as a discharge port, and the lattice-shaped second exhaust holes 11 provided in the rear case 3 are provided.
Is in communication with (The first exhaust hole will be described later.) In a space in front of the middle frame 5 in the main body case, a dust collecting filter 12 including a so-called electret filter 13 formed into a bellows-like electret and a deodorizing filter 14 made of activated carbon is provided. It is stored. The dust filter 12 is housed in the frame 15. Reference numeral 16 denotes a claw that presses the dust filter 12 so as not to come off from the inside of the frame 15. The dust collection filter 12 can be taken out from the side of the front case 2. Reference numeral 18 denotes a handle formed on the frame 15 for taking out.

The front of the front case 2 is covered with a front cover 19. The outer casing of the main body of the air purifier includes a main body case 1 and a front cover 19. The front cover 19 is provided with a number of vertically elongated slit-shaped first intake holes 20. Front cover 19
Is attached to the front case 2 by engaging a pair of projections 21 projecting from the lower end of the front cover 19 with a pair of receiving portions 22 formed at the lower end of the front case 2 (see FIG. 1). The front cover 2 has a pair of locking holes 23 (see FIG. 6) formed on the left and right of the upper part of the front case 2.
This is performed by engaging a pair of claws 24 attached to the upper left and right sides of the 19.

This will be described with reference to FIG. On the back side of the front cover 19, a slide plate storage box 26 is attached,
A slide plate 28 is mounted in the storage box 26 so as to be slidable left and right, and the claw 24 is protruded from the slide plate 28,
The slide plate 28 is always caught outward by the spring 30.
24 is urged in a direction to engage with the locking hole 23. When the acupressure part 29 formed at the end of the slide plate 28 is pressed inward against the spring 30, the engagement between the claw 24 and the locking hole 23 is released, and the front cover 19 can be removed from the front case 2. When the hand is released from the pressing portion 29, the pawl 24 and the locking hole 23 are engaged by the force of the spring 30. Thus, the front cover 19 is replaced with the front case 2
It can be more easily attached and detached.

The front cover 19 and the front case 2 are respectively provided with a discharge wire 31 serving as a discharge electrode and a counter electrode 32, and a high negative voltage is applied to the discharge wire 31 while a positive high voltage is applied to the counter electrode 32. By applying a voltage (may be grounded), the discharge wire 31 and the counter electrode
An ion wind generator is configured to generate a corona discharge between the 32 and induce an ion wind by the discharge.

Hereinafter, the ion wind generator will be described. The discharge wire 31 is attached to a gutter-like discharge wire attachment case 33 made of synthetic resin as shown in FIG. The mounting case 33 is detachably mounted in the vertical direction at the center of the rear side of the front cover 19 as described later. A metal terminal plate 34 is mounted on the upper end of the mounting case 33, while a U-shaped terminal is mounted on the lower end of the mounting case 33.
A U-shaped metal reinforcing plate 37 is attached along the inside of the elastic piece 36. As shown in FIG. 5, the reinforcing plate 37 has one end 38 engaged with an engaging portion 39 provided at the lower end of the mounting case 33 and a hole 40 engaged with a claw 41 provided on the elastic piece 36. The elastic piece 36 is mounted along the elastic piece 36 to reinforce the elastic piece 36 and adjust the elasticity of the elastic piece 36 so that the elasticity of the elastic piece 36 becomes rigid. Key-shaped claws 42 and 43 are formed on the terminal plate 34 and the reinforcing plate 37, respectively, and both ends of the discharge wire 31 are engaged with the claws 42 and 43 via springs 44, respectively.

Next, a method for mounting the mounting case 33 to which the discharge wire 31 is mounted on the front cover 19 will be described. Protrusions 45, 46 are formed inwardly at the upper and lower portions of the center of the back surface of the front cover 19, and one engagement hole 47 is formed in the upper protrusion 45, and a lower protrusion is formed.
46 has two engagement holes 48 (see FIG. 9).
One protrusion 49 is provided at the upper end of the mounting case 33, and two claws 50 are formed on the lower surface of the elastic piece 36 at the lower end of the mounting case. The projection 49 is arranged so that the surface 95 corresponding to the bottom of the gutter of the gutter-shaped mounting case 33 faces the front cover 19.
4 is inserted into the engagement hole 47 from below, while the elastic piece 36 is pushed in as shown by the arrow in FIG. 5 so that the claw 50 is engaged with the engagement hole 48 with the elasticity of the elastic piece 36. At the same time, the mounting case 33 can be mounted on the front cover 19. 51 and
Numeral 52 is a guide piece integrally formed from both sides of the projecting pieces 45 and 46, and serves as a guide when the projecting part 49 is inserted into the engaging hole 47 and when the elastic piece 36 is pushed. Reference numeral 68 denotes a portion corresponding to the side surface of the gutter of the mounting case 33.

At the lower end of the mounting case 33, a high voltage generator (not shown) for supplying a high voltage to the discharge wire 31 will be described later.
An operation piece 54 for operating the first safety switch 53 inserted in the current supply circuit is integrally formed (see FIGS. 7 and 9). With this operation piece 54, the mounting case 33 is
When the front cover 19 is mounted on the front case 2 with the front cover 19 mounted, the first safety switch 53 is closed and the high voltage generator 80 is closed.
The front cover 19 in the front case 2
Then, the first safety switch 53 is opened to make the high voltage generator 80 inoperable.

On the back surface of the front cover 19, a pre-filter 55 for removing in advance air dust sucked through the slit-shaped first air inlet 20 is attached. The pre-filter 55 is divided into two right and left parts as shown in FIG.
As in the case of 19, a synthetic resin frame 57 having a number of vertically elongated slits 56 and a synthetic resin net 58 integrally formed with the frame 57 are provided. With these two pre-filters 55, the front cover
The entire surface of the first air intake hole 20 of 19 is covered.

On the back surface of the front cover 19, a wall 59 extending toward the front case 2 is formed integrally on the left and right sides so as to surround the outside of the first air intake hole 20. Through holes for inserting engaging pieces 60 protruding outside each of the frame bodies 57
61 are formed (see FIG. 2). A pre-filter fixing plate 62 is fixed to the upper and lower two places at the center of the back surface of the front cover 19 with screws 63, and a pair of elastic fixing pieces 64 protrude from the fixing plate 62 as shown in FIG. , This fixed piece 64,
Claws 65 protruding inside each of the left and right pre-filter frames 57
Through holes 66 are formed. The pre-filter 55 is mounted by engaging the engaging piece 60 with the through hole 61 and the claw 65 with the through hole 66, respectively.

The above description has been made on the discharge wire side of the ion wind generator, but now on the counter electrode side. The front case 2 is provided with a rectangular metal counter electrode 32 so as to face the first air intake hole 20 of the front cover 19. At the upper end of the opposing electrode 32, a contact piece 70 which is inserted into the front case 2 and to which a positive high voltage is applied is bent as shown in FIG. A rib 71 protrudes from the front case 2 so as to surround the counter electrode 32, and a wall 59 protruding from the front cover 19 as shown in FIG. In this wall 59, a number of horizontally long slit-shaped first exhaust holes 72 are formed (see FIG. 2). Outside the rib 71 of the front case 2, a number of horizontally long slit-shaped second intake holes 73 are formed.

The counter electrode 32 has an electrically insulating dust-collecting paper 74 attached thereto. This dust collecting paper 74 is similar to kitchen paper. The dust collecting paper 74 is pressed at its upper end by a pressing plate 75 so as not to come off the counter electrode 32, and its lower end is pressed and held by a pressing portion 100 protruding from the back surface of the front cover 19. .

The pressing plate 75 is rotatable by pivotally supporting a shaft 76 projecting from both left and right ends thereof on a bearing 77 provided on the rib 71 as shown in FIG. In addition, a spring 78 wound around the shaft 76 constantly urges the dust-collecting paper 74 in a direction in which the dust-collecting paper 74 is pressed against the counter electrode 32. Also holding part
As shown in FIGS. 2 and 7, reference numeral 100 projects from the left and right below the back surface of the front cover 19. When the front cover 19 is attached to the front case 2, the lower end of the dust-collecting paper 74 is It is set to hold down.

When the dust collecting paper 74 is attached, first, the pressing plate 75 is rotated against the urging force so that the upper end of the dust collecting paper 74 is
And hold it temporarily by holding it down with a holding plate.
In this state, the dust collecting paper 74 hangs down due to its own weight, and naturally expands to a predetermined size. When the front cover 19 is mounted on the front case 2 from this state, the pressing portion 100 presses the lower end of the dust collecting paper 74 toward the counter electrode 32, and the dust collecting paper is mounted. To remove the dust collecting paper 74, reverse the above operation,
The user removes the cover 19 and rotates the holding plate 75 to remove the upper end portion of the dust collecting paper from the holding plate.

Above the counter electrode 32 of the front case 2, there is provided a high voltage terminal 81 to which a high negative voltage is supplied from a high voltage generator (not shown) (see FIGS. 6 and 8). When the front cover 19 with the mounting case 33 is mounted on the front case 2, the terminal plate 34 connected to the upper end of the discharge wire 31 contacts the high voltage terminal 81 as shown in FIGS. Apply high voltage. A positive high voltage from the high voltage generator is supplied to the contact 70 of the counter electrode 32. As shown in FIG. 8, the negative high-voltage terminal 81 and the contact piece 70 to which a positive high voltage is supplied are covered by a protective cover 84 attached to the back surface of the front case 2 and are integrally formed with the cover 84. 8 by partition wall 85
1 and 70 are separated to prevent dust from entering between them.

The first safety switch 53 is provided below the front case 2, and is operated by the operation piece 54 projecting from the lower end of the mounting case 33 as described above. Further, a second safety switch 83 operated by an operation piece 82 protruding from an upper portion of the rear surface of the front cover 19 is provided on an upper portion of the front case 2 (see FIG. 8). This safety switch 83 is for turning off all power when the front cover 19 is removed from the front case 2.

Next, the operation will be described. When only the high voltage generator is operated without energizing the motor 6, the fan 8 does not rotate, a negative high voltage, for example, −7 KV is applied to the discharge wire 31, and the positive electrode 32 has a positive high voltage. A voltage of, for example, +7 KV is applied.

As a result, a corona discharge is generated between the discharge wire 31 and the counter electrode 32 to generate ion wind. Outside air is sucked from the first air intake hole 20 of the front cover 19 by the ion wind, and the dust contained in the sucked air comes into contact with gas ions and electrons generated by the discharge, and is negatively charged, so that the high potential is opposed. The charged dust moves toward the electrode 32 and adheres to the dust collecting paper 74 attached to the counter electrode 32. The air from which dust has been removed is supplied to the large number of horizontally elongated slit-shaped first exhaust holes 72.
More released. In FIG. 2, arrow A indicates the flow of air at this time.

In this case, since the amount of ventilation is only induced by the ionic wind, the dust collecting ability is low. However, it is possible to keep the room air clean without feeling the noise due to the rotation of the fan 8 or the cold caused by the ventilation. Can be. Therefore, the operation is suitable when the air is slightly contaminated or when the temperature is low.

Next, when only the electric motor 6 is energized and the operation of the high voltage generator is stopped, no high voltage is applied to the discharge wire 31 or the counter electrode 32. On the other hand, the fan 8 rotates. As a result, the air is not sucked by the ion wind, but instead passes between the front cover 19 and the front case 2 through the plurality of second slit-shaped suction holes 73 as shown by the arrow B in FIG. The outside air is sucked, passes through the dust filter 12, passes through the fan casing 9, and is exhausted into the room through the second exhaust hole 11. In this process, dust contained in the sucked air is captured by the dust collecting filter 12 and purified.

In this case, since the indoor air is forcibly circulated by the fan to obtain a large amount of circulating air, the dust can be efficiently removed by the dust collecting filter 12. Therefore, this operation is suitable when the air in the room is dirty or when the air in a large room is purified.

The dust collecting paper 74 must be replaced when it becomes dirty. To replace the dust collecting paper 74, as described above, first remove the front cover 19 to make the lower end of the dust collecting paper 74 free, and press the holding plate 75. Rotate to hold the upper end of dust collection paper 74
You can get it from 75.

As described above, first, the new dust-collecting paper is inserted into the lower end of the dust-collecting paper 74 below the pressing plate 75 and is temporarily held by the pressing plate. In this state, the dust-collecting paper 74 hangs down due to its own weight and naturally expands to a predetermined size. Therefore, if the front cover 19 is attached to the front case 2, the pressing portion 10
0 presses the lower end portion of the dust collecting paper 74, and the dust collecting paper is mounted. In this manner, the installation of a new dust-collecting paper can be easily performed by temporarily holding only the upper end of the dust-collecting paper with the holding plate 75.

When the dust collecting paper is replaced, the front cover 19 is removed from the front case 2, so that the pre-filter 55 and the mounting case 33 are also separated from the main body case (composed of the front case 2 and the rear case 3). Therefore, the pre-filter 55, the mounting case 33, and the discharge wire 31 mounted on the mounting case 33, which are easily contaminated like the dust collecting paper, can be cleaned. Here, the pre-filter 55 is
Of the front cover 19 by removing the hooks 65 from the through holes 61 and the claws 65 thereof from the through holes 66, respectively.
By removing the claw 50 at the lower part from the engagement hole 48 and the projection 49 at the upper part from the engagement hole 47,
The discharge wire 31 can be easily separated from the mounting case 33 and can be cleaned by removing both ends of the discharge wire 31 from the key-shaped claws 42 and 43.

[0034]

According to the present invention (invention of claim 1), the dust collecting paper is only held down at one end by the pressing plate, and the cover (the front cover in the embodiment) is attached to the main body case. At the same time, the other end side is pressed against the counter electrode side by the pressing part formed on the cover, so that it can be easily attached along the counter electrode, and removal can be done simply by removing the cover and releasing the pressing by the pressing plate. It can be easily removed and the dust collection paper can be easily replaced.

If one end of the dust-collecting paper is set to the upper side and the other end is set to the lower side, the dust-collecting paper hangs down by its own weight only by holding the upper side with the pressing plate. Therefore, it is not necessary to expand the dust collecting paper to a predetermined size, and the workability can be further improved.

Further, the pressing plate is constantly urged to rotate toward the counter electrode by the urging means, so that one end of the dust collecting paper is rotated by rotating the pressing plate. Easy to remove and hold.

Further, by providing the cover with a detachable pre-filter and discharge electrode for covering the intake hole, the cover and the pre-filter and discharge electrode can be removed when the dust collector is replaced. In addition, it becomes easier to clean.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire air purifier of the present invention.

FIG. 2 is a cross-sectional view showing the entire air cleaner.

FIG. 3 is a longitudinal sectional view showing a mounting case of the air cleaner to which a discharge wire is mounted.

FIG. 4 is an enlarged vertical sectional view showing a state where the upper part of a mounting case of the air purifier is mounted.

FIG. 5 is an enlarged vertical sectional view showing a state where the lower part of a mounting case of the air purifier is mounted.

FIG. 6 is a front view of the main body case in a state where a front cover of the air purifier is removed.

FIG. 7 is a rear view of a front cover of the air purifier.

FIG. 8 is a sectional view taken along the line BB of FIG. 6 when the front cover of the air purifier is mounted.

FIG. 9 is a cross-sectional view taken along line AA of FIG. 6 when a front cover of the air purifier is mounted.

FIG. 10 is an enlarged view of the inside of a circle C of FIG. 6 showing a state of attaching dust collection paper of the air purifier.

[Explanation of symbols]

 20 1st intake hole (intake hole) 19 Front cover (cover) 1 Main body case 2 Front case 3 Rear case 31 Discharge wire (discharge electrode) 32 Counter electrode 74 Dust collecting paper 72 First exhaust hole 75 Press plate 100 Press section 78 Spring (Biasing means) 55 Pre-filter

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B03C 3/40 B03C 3/40 C 3/41 3/41 H 3/14 A

Claims (4)

[Claims] 1. A cover having an intake hole is detachably attached to a main body case, and a discharge is generated by applying a high voltage between a discharge electrode provided in the cover and a counter electrode provided on the main body case. This discharge generates ion wind to charge dust in the outside air sucked from the intake hole, removes the dust with a dust collector attached to the counter electrode, and exhausts the dust. Forming a pressing plate for pressing one end of the dust-collecting paper toward the counter electrode and forming a pressing portion for pressing the other end of the dust-collecting paper when the cover is attached to the main body case. Become an air purifier. 2. The air purifier according to claim 1, wherein the one end of the dust collecting paper is set to an upper side, and the other end is set to a lower side. 3. The air purifier according to claim 1, wherein the pressing plate is rotatably supported by the main body case, and is urged by a constant urging means to rotate toward the counter electrode. 4. The air purifier according to claim 1, wherein a pre-filter for covering the intake hole and the discharge electrode are detachably mounted on the cover.