JP2856580B2 - air purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main body having a detachable front panel, a pre-filter which is detachably mounted on the main body, and which is located in an air suction passage into the main body when the pre-filter is mounted. The present invention relates to an air purifier provided with a high-voltage separating device that charges and removes dust contained in air that has passed through the air cleaner.

[0002]

2. Description of the Related Art An example of an air purifier is shown in FIGS. In FIG. 12 showing the entire vertical cross section, a bell mouth 2 is formed in a main body 1, and a motor 5 equipped with a centrifugal blower blade 4 is arranged corresponding to the opening 3 of the bell mouth 2. I have. A filter 6 and a high-voltage separating device 7 are provided on the front surface of the opening 3 of the bell mouth 2, and a pre-filter 8 is detachably provided on the front side of the high-voltage separating device 7. And a slit 9a is provided on the front surface of the main body 1.
Is mounted.

Therefore, when the motor 5 is driven, the air in the room is sucked from the slit 9a of the front panel 9 by the air blown by the centrifugal air blowing blades 4 and passes through the pre-filter 8, whereby the air enters the air. The relatively large dust contained is removed by the pre-filter 8.

The high-voltage separating device 7 comprises a discharge wire 7a and a counter electrode plate 7b, between which a high voltage (about 70
Since a corona discharge is generated by applying a DC voltage of 00V, fine dust contained in the air that has passed through the pre-filter 8 is ionized, adsorbed by the filter 6, and removed. Therefore, the indoor air sucked into the main body 1 is purified by the pre-filter 8 and the filter 6 and discharged into the room, whereby the indoor air is purified.

When the front panel 9 is removed from the main body 1 in order to inspect or replace the filter 6, if a high pressure is applied to the high piezoelectric separation device 7 by an air cleaning operation, the high piezoelectric separation device 7 When the front panel 9 is detached from the main body 1, there is a risk of electric shock due to touching the discharge wire 7a.
The power supply to the high-voltage separating device 7 is shut off.

When the pre-filter 8 is detached from the main body 1 for cleaning, if a high pressure is applied to the high-voltage separating device 7 by the air cleaning operation, the high-voltage separating device 7 is subjected to a comparison such as lint. When the pre-filter 8 is removed from the main body 1, it is the same as when the front panel 9 is removed, since there is a possibility that a large amount of dust adheres and a large current flows between the discharge wire 7 a and the counter electrode plate 7 b. In addition, the power supply to the high-voltage separating device 7 is shut off.

Therefore, a micro switch 10 that is turned on when the front panel 9 is mounted and a micro switch 11 that is turned on when the pre-filter 8 is mounted are provided in the main body 1. 9 and the pre-filter 8 are detected to be removed from the main body 1.

In FIG. 13 showing an electric circuit, microswitches 10 and 11 are interposed in a current path 14 connecting a plug 12 and a power supply unit 13. The power supply unit 13 drives the motor 5 in accordance with an operation on the operation unit 15 and supplies power to the high-voltage generation unit 16. When power is supplied from the power supply unit 13, the high-voltage generation unit 16 boosts the power and increases the discharge voltage of the high-voltage separation device 7.
a and the counter electrode plate 7b. With the above configuration, the front panel 9 or the pre-filter 8
When is disconnected from the main body 1, any one of the microswitches 10 and 11 is turned off and the power supply to the power supply unit 13 is cut off. Therefore, it is possible to prevent a high voltage from being applied to the high piezoelectric separation device 7. it can.

[0009]

However, in the above-mentioned conventional configuration, the micro switches 10 and 11 are provided corresponding to the front panel 9 and the pre-filter 8, respectively, so that two micro switches 10 and 11 are required. In addition, not only does the cost of parts increase, but also the wiring between the detection switches 10 and 11 is troublesome, which generally causes a problem of an increase in cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to cut off the power supply of a high-voltage separating device for removing dust when a front panel or a pre-filter is removed from a main body. Alternatively, a detection switch for detecting that the pre-filter has been removed is set to 1
It is an object of the present invention to provide an air purifier that can be simplified by reducing the number of components.

[0011]

SUMMARY OF THE INVENTION The present invention provides a main body having a detachable front panel, a front panel detachably mounted on the main body, and a front filter and a pre-filter which are positioned in an air suction passage into the main body in a mounted state. And a high-voltage separating device that charges and removes dust contained in the air that has passed through the pre-filter, wherein the pre-filter is pressed by the front panel in a state where the pre-filter is mounted on the main body. An elastic portion that is elastically deformed is provided on the pre-filter, and a detection switch for detecting a deformed state of the elastic portion is provided. When the detection switch is in a non-detection state, power to the high-voltage separating device is shut off. It is configured as follows.

[0012]

When the front panel and the pre-filter are attached to the main body, the elastic portion provided on the pre-filter is pressed by the front panel to be elastically deformed, and the detection switch is set in the detection state accordingly. Is connected to the power supply.

When the front panel is detached from the main body, the pressing of the elastic portion by the front panel is released, and the elastic portion returns to its original shape. Is shut off.

When the pre-filter is removed from the main body, the elastic portion escapes from the position facing the front panel, so that the detection switch is in the non-detection state and the power supply to the high-voltage separating device is shut off.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is an overall perspective view. 2, the main body 21 includes an outer frame 22, a front panel 23, and an exhaust panel 24 made of synthetic resin. Front panel 2
3, a slit 23a for sucking indoor air is formed. The exhaust panel 24 is provided with an operation section 25 and an exhaust port 24a for discharging purified air.

FIG. 1 shows an entire longitudinal section. In FIG. 1, a bell mouth 26 is formed in a main body 21, and a motor 28 is provided corresponding to an opening 27 of the bell mouth 26, and a centrifugal air blowing blade 29 is attached to the motor 28. Is installed. A rectangular frame 26a is formed on the front surface of the bell mouth 26, and a filter 30 and a high-voltage separating device 31 are provided in the frame 26a. Here, the high piezoelectric separation device 31
The discharge wire 32 stretched on the main body 21 side is located at the center of the air passage 33 a formed in the counter electrode plate 33, and a DC voltage of about 7000 V is applied to the discharge wire 32 and the counter electrode plate 33 is By applying 0V, a corona discharge is generated between them.

On the other hand, a pre-filter 34 is mounted on the front side of the high-voltage separating device 31, and the pre-filter 34 is located between the front panel 23 and the high-voltage separating device 31 in the mounted state.

In this case, the front panel 23 and the pre-filter 34 are configured to be detachable from the main body 1. That is, in FIG. 7 showing the high-voltage separating device 31, a bent portion 33b having a U-shaped cross section is formed on both sides of the counter electrode plate 33, and the pre-filter 34 is inserted and supported in the bent portion 33b. I have.

In FIG. 8 showing the pre-filter 34, the pre-filter 34 is made of an elastically deformable synthetic resin frame 34a.
The filter part 34b is integrally formed. in this case,
A tongue-shaped elastic portion 34c is formed integrally with the upper portion of the pre-filter 34.

On the other hand, the front panel 23 and the pre-filter 3
In FIG. 5 showing a state in which the main body 2 is removed from the main body 1,
A bottom surface 22a protruding forward is formed integrally with one outer frame 22, and a ridge 22b is formed integrally with the outer frame 22 corresponding to both sides of the bottom surface 22a.

In FIG. 6 showing the front panel 23, a pair of claw portions 2 pointing upward are provided on the upper rear side of the front panel 23.
3b are integrally formed, and a pair of horizontally oriented claws 23c are integrally formed on the bottom. Further, a rib 23d is integrally formed on the upper rear side of the front panel 23. In this case, as shown in FIG. 4, the hook 23 c of the front panel 23 is hooked inside the exhaust panel 24, and the hook 23 c is engaged with the ridge 22 b of the outer frame 22. 23 can be attached to the main body 21.

Here, as shown in FIG.
3 is mounted on the main body 21, a gap 35 is formed between the front panel 23 and the bottom 22 a of the outer frame 22, through which the pre-filter 34 can be attached and detached. It is possible.

Now, in FIG. 3 showing a longitudinal section of a main part,
At a predetermined position above the bell mouth 26, a mounting bracket 36 is fixed, and a detection switch 37 composed of, for example, a microswitch is fixed to the mounting bracket 36. In this case, the front panel 23 and the pre-filter 34
The position and shape of the elastic portion 34c provided on the pre-filter 34 are set so that the elastic portion 34c is provided by the rib 23d provided on the front panel 23, and the elastic portion 34c The position of the detection switch 37 is set so that the detection switch 37 is turned on by the pressing deformation.

FIG. 9 shows an electric circuit. In FIG. 9, a detection switch 37 is interposed in a current path 40 connecting the plug 38 and the power supply unit 39. The power supply unit 39 drives the motor 28 based on an instruction from the operation unit 41 and supplies power to the high voltage generation unit 42. The high voltage generator 42 boosts the power from the power supply 39 and supplies the boosted power to the discharge wire 32 and the counter electrode plate 33 of the high piezoelectric separation device 31.

Next, the operation of the above configuration will be described. When the operation unit 41 is operated, the power supply unit 39 controls the motor 28.
Is driven to rotate the centrifugal blow blade 29, and the air in the room is sucked into the main body 21 through the front panel 23. At this time, relatively large dust contained in the air sucked into the main body 21 is removed when passing through the pre-filter 34.

When a high voltage is applied to the high-voltage separating device 31 from the high-voltage generating section 42 based on the operation of the operating section 41, a corona discharge occurs between the discharge wire 32 and the counter electrode section 33. Fine dust contained in the air that has passed through the pre-filter 34 is ionized by corona discharge and is removed by attaching to the filter 30.

With the above operation, the indoor air sucked into the main body 21 from the front panel 23 is purified by the pre-filter 34 and the filter 30, and the purified air is introduced into the room through the exhaust port 24a of the exhaust panel 24. The air is discharged, thereby purifying the indoor air.

Now, when the air cleaning operation is performed for a long time,
Since a large amount of dust adheres to the pre-filter 34 to reduce its purification function, it is necessary to remove the pre-filter 34 from the main body 21 for cleaning. In such a case, the lower part of the pre-filter 34 is grasped with a finger and pulled out from the gap 35 formed on the lower surface of the main body 21, whereby the pre-filter 34 is removed.
Can be removed from the main body 21. At this time, since the elastic portion 34c formed integrally with the pre-filter 34 escapes from the position facing the rib 23d of the front panel 23, the pressing state of the detection switch 37 by the elastic portion 34c as shown in FIG. The detection switch 37 is turned off in response thereto, and the power supply path 40 to the power supply unit 39 is cut off. Therefore, the front panel 23 is connected to the main body 2 during the air cleaning operation.
If it is removed from 1, the air cleaning operation is stopped and high pressure is not applied to the high-voltage separating device 31, so that relatively large dust such as lint may adhere to the high-voltage separating device 31. Can be prevented.

When the air cleaning operation has been performed for a long period of time, the filter 30 needs to be inspected or replaced. In such a case, the claw portion 23 of the front panel 23
The front panel 23 is removed from the main body 21 by releasing the engagement of the b and 23c with the main body 21. At this time, the front panel 23
Since the pressing state of the elastic portion 34c by the rib 23d is released, the elastic portion 34 returns to the original shape as shown in FIG. Is shut off. Therefore, when the front panel 23 is detached from the main body 21 during the air cleaning operation, the air cleaning operation is stopped and the high voltage is not applied to the high piezoelectric separation device 31, so that the high piezoelectric separation device 31 is touched by mistake. Even in this case, it is possible to prevent an electric shock through the pre-filter 34.

In short, in the case of the above embodiment, with the front panel 23 and the pre-filter 34 attached to the main body 21, the elastic portion 34 c formed on the pre-filter 34 by pressing by the rib 23 d formed on the front panel 23. Is deformed to turn on the detection switch 37, so that the front panel 23 or the pre-filter 34
In the state removed from 1, it is possible to prohibit the detection switch 3 from being turned off and the high voltage from being applied to the high piezoelectric separation device 31. Therefore, unlike the conventional example in which two detection switches are provided corresponding to the front panel and the pre-filter, one detection switch 37 can be used, and the cost can be reduced accordingly. Since the number of wires to the detection switch 37 is reduced, the cost can be reduced as a whole.

Further, as described above, since it can be realized only by integrally forming the ribs 23d on the front panel 23 and the elastic portion 34c on the pre-filter 34, the production of parts is troublesome. It won't be.

In the above embodiment, the ribs 23d are formed on the front panel 23. However, a convex portion corresponding to the ribs 23d may be formed integrally with the elastic portion 34c of the pre-filter 34. In this case, the ribs 23 are provided on the front panel 23.
Since it is not necessary to form d, the overall configuration can be simplified accordingly.

In the above embodiment, a contact-type limit switch is used as a detection switch, but a non-contact detection switch such as a photoelectric switch or a proximity switch may be used instead. .

In addition, the present invention can be implemented with appropriate modifications without departing from the scope of the invention.

[0035]

As is apparent from the above description, according to the air purifier of the present invention, the prefilter has an elastic portion which is elastically deformed by being pressed by the front panel in a state where the prefilter is mounted on the main body. By providing a detection switch for detecting the deformed state of the elastic portion, and when the detection switch is in a non-detection state, by shutting off the power supply to the high-voltage separating device for dust removal, 1
Since the detection panel detects that the front panel or pre-filter has been removed from the main body,
An excellent effect that, when the front panel or the pre-filter is removed from the main body, the power of the high-voltage separating device for removing dust is shut off, the number of detection switches can be reduced to one and the configuration can be simplified. To play.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of an air purifier.

FIG. 3 is a longitudinal sectional view of a main part.

FIG. 4 is a view corresponding to FIG.

FIG. 5 is a perspective view of a main body.

FIG. 6 is a perspective view of a front panel.

FIG. 7 is a perspective view of a counter electrode plate of the high-voltage separating device.

FIG. 8 is a perspective view of a prefilter.

FIG. 9 is a block diagram of an electric circuit.

FIG. 10 is a view corresponding to FIG. 1 with a pre-filter removed.

FIG. 11 is a view corresponding to FIG. 1 with a front panel removed.

FIG. 12 is a diagram corresponding to FIG. 1 showing a conventional example.

FIG. 13 is a diagram corresponding to FIG. 9;

[Explanation of symbols]

21 is a main body, 23 is a front panel, 23d is a rib, 31 is a high-voltage separating device, 34 is a pre-filter, 34c is an elastic part,
37 is a detection switch.

Continuation of front page (58) Fields investigated (Int. Cl. ⁶ , DB name) B03C 3/00-3/88 B01D 50/00 501 F24F 7/00

Claims (1)

(57) [Claims] A body having a detachable front panel;
A pre-filter detachably provided on the main body and located in an air suction path into the main body in a mounted state thereof, and a high-voltage separating device for charging and removing dust contained in air passing through the pre-filter. In the air purifier, the air purifier includes an elastic portion that is provided on the pre-filter and is elastically deformed by being pressed by the front panel when the pre-filter is attached to the main body, and a detection switch that detects a deformed state of the elastic portion, An air purifier characterized in that when the detection switch is in a non-detection state, the power supply to the high-voltage separating device is shut off.