JPH0773688B2 - air purifier - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air purifier provided with a charging electrode device.

2. Description of the Related Art Conventionally, this type of air purifier has a configuration as shown in FIGS. 4 and 5. That is, dust in the air taken into the main body case 107 from the front grill 101 of the main body case 107, coarse dust such as cotton dust is removed by the prefilter 102, and other fine dust such as cigarette smoke. Are positively charged in the electrode portion 105 composed of the discharge wire 103 applied to a high voltage and the counter electrode plate 104 grounded, and are collected by the electrostatic filter held by the filter frame 106. The air thus dedusted was blown out from the blow-out grill 110 by a blower including a blade 108 provided at the back of the main body case 107, a driving motor 109 thereof, and the like.

In addition, two normally open type microswitches 111 and 112 are inserted in series in the power supply circuit.
The lever 113 of 11 is a lever 115 of the micro switch 112, while the rib 114 is integrally formed on the front grill 101.
Are pressed by the filter frame 106 to close the circuit, but when removing the front grill 101 when cleaning the electrode part 105 and when removing the filter frame 106 from the top of the main body when replacing the electrostatic filter, In the case of
Are exposed and dangerous, so each micro switch
When the levers 113 and 115 of 111 and 112 are released and the power supply circuit is opened, the discharge line 103 is energized and the motor 1
The power supply to 09 was stopped and the safety was maintained.

Problems to be Solved by the Invention In such a conventional configuration, even if the pre-filter 102 is forgotten to be attached during maintenance, the power is turned on, the dust collecting function is deteriorated, and a thin metal rod from the intake port of the front grill 101, etc. When inserted, there is a problem that it is possible to easily enter the inside, and the metal rod comes into contact with the discharge wire 103 applied to high voltage, which may cause electric shock.

The present invention solves such a problem and provides an air purifier which prevents deterioration of the dust collecting function and improves safety by preventing the power supply from being supplied unless a prefilter is attached. The purpose is to do.

Means for Solving the Problems In order to solve this problem, the present invention provides an electrode unit for charging dust in the air which is applied to a high pressure, a filter for collecting dust, and a filter for holding the filter. A frame, a front grill that sucks in air, a prefilter that can be attached to and removed from the front grill, and a microswitch that is placed in series with the power circuit and that closes the circuit when the lever is pressed and opens the circuit when the lever is released. Provided with the front grill, a pre-filter is movably provided with a protruding piece that is pressed by the pre-filter when the main body is attached to close the micro switch,
A spring is provided to push back the protrusion when the pre-filter is removed.

Operation With this configuration, the pre-filter that is detachably locked to the front grill pushes the protruding piece mounted on the front grill during operation, so that the micro switch lever can be installed without either the front grill or the pre-filter. Power cannot be turned off because you cannot press.

EXAMPLE An example of the present invention will be described below with reference to FIGS.

In FIG. 1, reference numeral 1 is a front grill, to which a pre-filter 2 can be attached and detached from the upper part. A projection piece 3 is attached to the front grill 1 so as to be pushed by the pre-filter 2 so as to be movable, and a spring 4 for moving the projection piece 3 in the removing direction when the pre-filter 2 is removed is provided. The projection piece 3 pushes the lever 6 of the normally open type micro switch 5 arranged in series in the power supply circuit when the pre-filter 2 is attached, and as a result, the electrode wire 9 including the discharge wire 7 and the counter electrode plate 8 is pushed. It is energized.

FIG. 2 is a cross-sectional view of an essential part showing a process of removing the front grill 1 from the above state. In this state, the pre-filter 2 and the protruding piece 3 are removed together with the front grill 1, and as a result, the micro switch 5 The lever 6 is released and the power supply to the discharge wire 7 is stopped.

FIG. 3 is a cross-sectional view of essential parts showing a process of taking out the pre-filter 2 from the upper portion of the front grill 1 from the state shown in FIG. 1, but at this time also, by raising the pre-filter 2 upward, Since the protrusion piece 3 pushing the lever 6 is pushed out by the force of the spring 4 in the direction in which the pre-filter 2 is taken out, that is, upward, the lever 6 of the microswitch 5 is released and the electricity to the discharge wire 7 is stopped.

As described above, the projection piece 3 is attached to the front grill 1 through the spring 4, and the projection piece 3 is detachable from the upper portion of the front grill 1 by the pre-filter 2.
It is mounted by pressing, and at this time the projection piece 3 has a structure that pushes the lever 6 of the micro switch 5,
2, The circuit of the micro switch 5 will be open regardless of which of the front grill 1 is removed, and when the front grill 1 is removed during maintenance, the power supply to the discharge line 7 is stopped and safety is considered. Even if you forget to attach it, the same function is performed, so you can prevent the deterioration of the dust collection function and prevent electric shock when inserting a metal rod or the like.

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, the present invention provides the front grill with a protrusion piece that moves when the pre-filter is attached and detached, and a return spring, and the protrusion piece controls the opening and closing of the microswitch of the electric circuit. By doing so, it is possible to open and close the circuit when attaching and detaching the pre-filter and the front grill with one micro switch, which reduces the cost and the installation space of the micro switch.
Furthermore, the effects of preventing the deterioration of the dust collection function and improving safety can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an essential part showing an operating state of an air purifier according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of an essential part showing a process of removing a front grill of the air purifier, and FIG. FIG. 4 is a sectional view of a main part showing a process of taking out a prefilter of the air purifier, FIG. 4 is a perspective view showing a conventional air purifier, and FIG. 5 is a sectional view of the air purifier. 1 ... Front grille, 2 ... Pre-filter, 3 ...
Projection, 4 ... Spring, 5 ... Micro switch,
6 ... Lever, 7 ... Discharge wire, 8 ... Opposing plate, 9 ...
Electrode part.

Claims (1)

[Claims] 1. An electrode part for charging dust in the air applied to a high pressure, a filter for collecting dust and a filter frame for holding the filter, a front grill for sucking air, and a detachable unit from the front grill. With a possible pre-filter and a micro switch that is inserted in series with the power circuit, the circuit closes when the lever is pressed, and the circuit opens when the lever is released.
An air purifier provided with a movably provided protrusion that closes the microswitch when the prefilter is pressed by the prefilter when the main body is attached, and a spring that pushes back the protrusion when the prefilter is removed.