JPH10165839A - Air purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent charged dust from sticking to a counter electrode and to prevent the occurrence of abnormal discharge and the soiling of the counter electrode when you forget to stick dust collecting paper on the counter electrodes by making a high voltage generator inoperative not to cause discharge between a discharge electrode and the counter electrode. SOLUTION: In this purifier, high voltage is applied to between a discharge electrode 31 and a counter electrode 32 installed in a body to generate discharge, and by this discharge, an ionic wind is generated to charge dust in fresh air sucked from an air intake hole and the dust is removed by dust collecting paper stuck on the counter electrode before evacuating. A sticking detection switch 104 for detecting a sticking state of the dust collecting paper to the counter electrode is provided, and since this switch 104 is that which is opened when you forget to stick the dust collecting paper, it is inserted into an energizing circuit 90 of a high voltage generator 80.

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 discharge is generated by applying a high voltage between a discharge electrode and a counter electrode provided in a main body, and ion discharge is generated by the discharge and dust in the outside air sucked from an intake hole. An air purifier is known, for example, in Japanese Utility Model Publication No. 2-43495 in which dust is removed by a dust-collecting paper attached to a counter electrode and then exhausted.

In this air purifier, when the operation is performed in a state where the dust collecting paper is forgotten to be attached to the counter electrode, dust adheres to the counter electrode and contaminates the counter electrode. As a result, abnormal discharge is likely to occur. There is a problem. In addition, the contaminated counter electrode must be cleaned, and post-processing is troublesome.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an air cleaner in which no discharge is generated between a discharge electrode and a counter electrode when dust collecting paper is not attached.

Another object of the present invention is to provide an air purifier capable of reliably attaching dust collection paper to a counter electrode.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a discharge is generated by applying a high voltage between a discharge electrode and a counter electrode provided in a main body, and ion discharge is generated by the discharge to generate an ion wind. Dust in the outside air that has been sucked is charged, dust is removed by dust paper attached to the counter electrode, and then the dust is exhausted. Dust paper detection means for detecting the state of the dust collector attached to the counter electrode is provided. The high voltage is prevented from being generated by detecting the non-attachment of the dust collection paper by means.

More specifically, the dust collecting paper detecting means includes:
An attachment detection switch inserted in an energizing circuit to the high voltage generator that generates the high voltage, and an operation unit of an attachment detection switch formed on a pressing plate that presses the dust collection paper against the counter electrode, The operation unit does not open the attachment detection switch when the dust collection paper is pressed against the counter electrode by the pressing plate, and opens when the dust collection paper is not attached.

With this configuration, when dust collection paper is not attached, the attachment detection switch is opened, so that the high voltage generator does not operate, and no high voltage is applied between the discharge electrode and the counter electrode, and no discharge occurs.

Further, in the present invention, the pressing plate is provided with a protruding piece for pressing the dust-collecting paper against the counter electrode, and the mounting surface for attaching the counter electrode is provided with a recess into which the protruding piece enters when the dust-collecting paper is not attached. The operation portion provided on the holding plate is moved to a position where the attachment detection switch can be opened by entering the projection into the concave portion.

[0010] With this configuration, the dust collection paper can be reliably attached to the counter electrode by the protruding pieces. When the dust collecting paper is attached, the protruding piece does not enter the concave portion, the operation unit cannot move to the position where the attachment detection switch is opened, and the high voltage generator is operable with the attachment detection switch closed. However, when the dust collecting paper is not attached, the protrusion enters the concave portion, and moves to a position where the operation unit can open the attachment detection switch, thereby disabling the operation of the high voltage generator.

[0011]

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.

In the middle frame 5 and the rear case 3, a peripheral wall 10 of a spiral fan case 9 surrounding the fan 8 is formed. 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 In the space in front of the middle frame 5 in the main body case, a dust collecting filter 12 composed of 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 surface 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. Then, the holding portion 29 formed at the end of the slide plate 28 is
When the cover is pressed inward, the engagement between the pawl 24 and the locking hole 23 is released, and the front cover 19 can be removed from the front case 2. The pawl 24 and the locking hole 23 engage. Thus, the front cover 19 can be more easily attached and detached than the front case 2.

The front cover 19 and the front case 2 are provided with a discharge wire 31 serving as a discharge electrode and a counter electrode 32, respectively. A negative high voltage is applied to the discharge wire 31, and 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. The reinforcing plate 37 has one end 38 engaged with a locking portion 39 provided at the lower end of the mounting case 33, and a claw 41 provided with a hole 40 in the elastic piece 36.
Is attached 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. The terminal plate 34 and the reinforcing plate 37 have key-shaped claws, respectively.
The two ends of the discharge wire 31 are engaged with the claws 42 and 43 via springs 44.

Next, a method of 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.
Two engaging holes 48 are formed in 46. Mounting case 33
A protrusion 49 is provided on the upper end of the elastic piece 36, and two claws 50 are formed on the lower surface of the elastic piece 36 at the lower end of the mounting case. Then, with the surface 95 corresponding to the bottom of the gutter of the gutter-shaped mounting case 33 facing the front cover 19, the protrusion 49 is inserted from below into the engagement hole 47 as shown in FIG. FIG. 5 shows the elastic piece 36.
By pushing in as shown by the arrow in FIG.
The mounting case 33 can be attached to the front cover 19 by engaging the elastic piece 36 with the elastic piece 36. 51 and 52 are guide pieces integrally formed from both sides of the projecting pieces 45 and 46, respectively, and serve as guides 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, an operation piece 54 for operating a first safety switch 53 inserted in an energizing circuit for a high voltage generator 80 described later for supplying a high voltage to the discharge wire 31.
Are integrally formed (see FIG. 8). When the front cover 19 is mounted on the front case 2 with the mounting case 33 mounted on the front cover 19 with the operation piece 54, the first safety switch 53 is closed and the high-voltage generator 80 is closed. Then, the front cover 19 is removed from the front case 2 to open the first safety switch 53 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 integrally formed with the frame 57 are provided. With these two pre-filters 55, the front cover 19
Of the first air intake hole 20 is covered.

On the back surface of the front cover 19, a wall 59 is formed integrally on the left and right sides toward the front case 2 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) Pre-filter fixing plates 62 are fixed to the upper and lower two portions at the center of the rear surface of the front cover 19 with screws 63, and a pair of fixing pieces 64 project from the fixing plate 62 as shown in FIG. The fixing piece 64 is provided with a through hole for inserting a claw 65 protruding inside each of the left and right pre-filter frames 57.
66 are formed. Then, the engaging piece 60, the through hole 61, and the claw
By engaging the through hole 66 with the through hole 65, the pre-filter 55
Is installed.

The above description has been made on the discharge wire side of the ion wind generator, but now the counter electrode side will be described. 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 counter 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 by pressing plates 75, 75 above and below the dust collecting paper 74 so as not to come off from the counter electrode 32. As shown in FIG. 9, the holding 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. 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. This holding plate
By rotating 75 against the urging force, dust collector 74 can be removed from counter electrode 32 and replaced. FIG.
In FIG. 7, the dust collecting paper 74 is omitted.

On the back side of the pressing plate 75, a plurality of projecting pieces 100 are protruded as shown in FIG. 10, and one operation pin 101 projecting longer than the projecting piece 100 is protruded. On the other hand, the projecting piece 10
A recess 102 is formed at a position corresponding to 0, and an operation pin
A through hole 103 is formed at a position corresponding to 101. An attachment detection switch 104 operated by an operation pin 101 protruding from the through hole 103 is provided on the back side of the mounting surface. The attachment detection switch 104 is inserted in a circuit for supplying electricity to the high-voltage generator 80. 105 is a protective cover of the switch.

When the dust collecting paper 74 is attached to the counter electrode 32, the dust collecting paper 74 is pressed by the plurality of projections 100 as shown in FIG. 11, but the operation pin 101 moves due to the presence of the dust collecting paper 74. Therefore, the attachment detection switch 104 is not opened as shown by the solid line in FIG. 12, and is kept closed. However, if dust collecting paper 74 is not attached,
0 goes into the concave portion 102, and as a result, the operation pin 101 goes deep into the through hole 103 as shown by the dotted line in FIG. That is, the attachment detection switch 1
04 and an operation pin 101 serving as an operation unit thereof serve as dust collection paper detection means for detecting the attached state of the dust collection paper 74.

A high voltage terminal 81 to which a high negative voltage is supplied from a high voltage generator 80 is provided above the counter electrode 32 of the front case 2 (see FIGS. 6 and 7). When the front cover 19 with the mounting case 33 is mounted on the front case 2, the discharge wire 31
The terminal plate 34 connected to the upper end contacts the high voltage terminal 81 as shown in FIGS. 1 and 7, and applies a negative high voltage to the discharge wire 31. The positive high voltage from the high voltage generator 80 is supplied to the contact piece 70 of the counter electrode 32. As shown in FIG. 7, 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 mounted on the back surface of the front case 2 and integrally formed with the cover 84. The partitions 81 and 70 are separated by the partition 85 so that dust does not enter 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. 7). This safety switch 83 is for turning off all power when the front cover 19 is removed from the front case 2.

FIG. 13 shows an electric circuit diagram. An energizing circuit 89 from the power plug 87 to the motor 6 via the second safety switch 83 and the main switch 88 and an energizing circuit 90 to the high voltage generator 80 are arranged in parallel. The fan operation switch 91 is connected to the power supply circuit 89 to the motor, and the power supply circuit to the high-voltage generator is connected.
90 has an ion operation switch 92 and the first safety switch
53 and an attachment detection switch 104 are inserted respectively. The main switch 88, the fan operation switch 91, and the ion operation switch 92 are provided on an operation panel provided on the upper surface of the front case 2.

Next, the operation will be described. When the main switch 88 is turned on and the ion operation switch 92 is turned on in a state where the mounting case 33 and the dust collecting paper 74 are mounted at predetermined positions, the high voltage generator 80 operates, and a negative high voltage is applied to the discharge wire 31, for example. -7K
V, and a high positive voltage, for example, +
A voltage of 7 KV is applied. On the other hand, the electric motor 6 is not energized,
The fan 8 does not rotate.

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 collection ability is low. However, it is possible to keep the room air clean without feeling the noise caused by 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, the fan operation switch 91 on the operation panel 93
, The high voltage generator 80 does not operate, and no high voltage is applied to the discharge line 31 or the counter electrode 32. On the other hand, the electric motor 6 is energized and 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 and passed through the dust filter 12 to form a fan casing 9.
The air is exhausted into the room through the second exhaust hole 11 through the inside. 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, 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.

As described above, the operation by the ion wind and the operation by the fan can be appropriately selected, and the desired operation can be performed according to the degree, size, temperature, and the like of the room. If the ion operation switch 92 and the fan operation switch 91 are closed at the same time, the ion operation and the fan operation can be performed simultaneously.

By the way, if the attachment detection switch 104 is not provided, the ion operation switch 92 is left without attaching the dust collecting paper 74.
Then, the dust charged negatively by the discharge of the discharge wire 31 and the counter electrode 32 moves toward the counter electrode 32 having a higher potential and adheres to the counter electrode 32 as it is. As a result, the counter electrode 32 becomes dirty and an abnormal discharge is easily generated, and if the dust collecting paper 74 becomes dirty, it may be replaced.However, in this case, the dirty counter electrode must be cleaned, which is troublesome. .

However, since the attachment detection switch 104 for detecting the attachment state of the dust collection paper 74 is provided as described above and inserted into the energizing circuit 90 to the high voltage generator 80, if the dust collection paper 74 is not attached, , Open the attachment detection switch 104,
Since the high voltage generator 80 is not operated, the above-described problem does not occur.

As can be seen from the circuit diagram of FIG. 13, if the dust cover 74 is forgotten to be attached or if the front cover 19 is attached to the front case 2 with the mounting case 33 removed from the front cover 19, the attachment is performed. The detection switch 104 and the first safety switch 53 cannot be closed, and the high voltage generator 80 does not operate. However, the second safety switch 83 is closed by the operation piece 82, so that the fan 8 is rotated by the electric motor 6. be able to. That is, the air purifying action based on the ion wind cannot be performed, but the air purifying action based on the rotation of the fan can be performed. Therefore, even if the dust collecting paper 74 or the mounting case 33 is forgotten to be mounted or lost, or if the discharge wire 31 is disconnected and the mounting case 33 cannot be mounted, at least the air purification based on the rotation of the fan is performed. The action can be performed.

[0037]

According to the present invention (invention of claim 1), when the dust collector is forgotten to be attached, the high-voltage generator is not operated, so that the discharge between the discharge electrode and the counter electrode is prevented. Does not occur, charged dust does not adhere to the counter electrode, and abnormal discharge can be prevented from occurring. Also, there is no need to perform any troublesome work such as cleaning the counter electrode.

According to the second aspect of the present invention, the operating portion of the attachment detecting switch for detecting the attached state of the dust-collecting paper is formed on the pressing plate that presses the dust-collecting paper against the counter electrode. I can do it.

Further, according to the third aspect of the present invention, the pressing member for holding the dust collecting paper is provided on the pressing plate, and when the dust collecting paper is not attached, the projecting piece is released into the concave portion, so that the operating portion provided on the pressing plate. Can move to the position where the attachment detection switch can be opened, so that the dust collection paper can be securely attached to the counter electrode by the protruding piece that controls the movement of the operation unit.

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

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

FIG. 9 is a view showing a state in which dust collecting paper is attached to the air purifier.
FIG.

FIG. 10 is a rear view of a holding plate for holding dust collection paper of the air purifier.

FIG. 11 is a sectional view based on the line XX of FIG. 9;

FIG. 12 is a sectional view taken along line YY of FIG. 9;

FIG. 13 is an electric circuit diagram of the air purifier of the present invention.

[Explanation of symbols]

 1 Main body case 31 Discharge wire (discharge electrode) 32 Counter electrode 20 1st suction hole 74 Dust paper (dust collection section) 72 1st exhaust hole 80 High voltage generator 104 Attachment detection switch 75 Holding plate 101 Operation pin (operation section) 100 Protrusion 102 Recess

Claims (3)

[Claims] 1. A discharge is generated by applying a high voltage between a discharge electrode and a counter electrode provided in a main body, and ion discharge is generated by the discharge to charge dust in the outside air sucked from an intake hole. A dust collector attached to the counter electrode to remove dust after the dust is removed, and exhausting the dust collector; and a dust collector detector for detecting a state of the dust collector attached to the counter electrode is provided. An air cleaner in which the high voltage is prevented from being generated by detecting non-attachment. 2. The dust collecting paper detecting means is formed of an attachment detecting switch inserted in an energizing circuit for a high voltage generating device for generating the high voltage, and a pressing plate for pressing the dust collecting paper against a counter electrode. The operation unit of the attachment detection switch is not opened when the attachment detection switch is pressed against the counter electrode by the pressing plate, and when the dust collection paper is not attached, the operation detection switch is not opened. The air purifier according to claim 1, wherein the air purifier is opened. 3. The pressing plate is provided with a protruding piece for pressing the dust-collecting paper against the counter electrode, and the mounting surface for attaching the counter electrode is provided with a recess into which the protruding piece enters when the dust-collecting paper is not attached. 3. The air purifier according to claim 2, wherein the operation portion provided on the holding plate is moved to a position where the attachment detection switch can be opened by entering the projection into the concave portion.