JPH08200794A - Dirt detection of dust collecting sheet or filter - Google Patents

Abstract

PURPOSE: To judge the stain state of a dust collecting sheet according to the discriminated state of a light emitting unit by opening a hole at the position to be easily seen from the exterior of the rear surface of this apparatus body, mounting the unit at the rear surface, and forming a spot light emitting unit from the rear surface of the sheet. CONSTITUTION: A hole 3 is opened at the position which is most conspicuous from the exterior at an apparatus body 1 for mounting a dust collecting sheet 2, a light emitting unit 4 is mounted on the rear surface of the apparatus, and a spot light emitting part by the unit 4 from the rear surface of the sheet 2 is formed. The unit 4 uses, for example, a neon bulb without anxiety of a disconnection, a color lens made of acryl, etc., is engaged with the hole 3 as required for use. When new sheet 2 is set in the body 1, the spot light emitted part is externally clearly discriminated at the spot emitting light. When the sheet 2 is contaminated to become near a replacing period, the spot light is scarcely discriminated from the exterior to inform the near of the replacing period of the sheet 2.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention detects a replacement time due to dirt on a filter made of non-woven fabric or dust collecting paper used for an air cleaning device or a ventilation fan with a filter, and other ventilation and dust collecting devices. Regarding the scheme.

[0002]

2. Description of the Related Art A conventional method is to use a timer. In this case, however, there is a drawback that the set time of the timer is not constant depending on the place and state of use of the device, and dirt is detected electrically. The one to be tried has the defect of malfunction due to external conditions such as humidity other than dirt,
For those that detect dirt based on changes in reflectance, if part of the device is installed in the dust collection part, part of the device will become dirty with dust collection paper or a filter and will not operate normally. There are drawbacks.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention is to eliminate erroneous operations and enable easy detection.

[0004]

[Means for Solving the Problem] As means for solving this problem, the apparatus is not installed in a dust collecting part which is not affected by humidity and is dirty, and a spot light emitting part is provided from the back of the main body to the back of the filter or dust collecting paper. Is to be formed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS To explain the present invention with reference to the drawings, FIG. 1 is a cross-sectional view of the device portion of the present invention. Is provided. The light-emitting body 4 shown in the figure is, for example, a neon ball that does not cause a disconnection.
If necessary, a color lens made of acrylic or the like may be fitted in the hole 3 for use.

FIG. 2 shows a case where a new dust collecting paper 7 is set on the apparatus main body 1. In this case, the spot light emission portion 9 can clearly discriminate the spot light emission from the outside as shown in the drawing. .

On the other hand, what is shown in FIG. 3 is 8 when the dust collecting paper is dirty and the replacement time is near, and as shown in the figure, the spot light emitting portion 10 is gradually discriminated from the outside. It is difficult to do so, and the time to replace the dust collecting paper 2 is approaching. It informs the user.

[0008]

The effects of the present invention are as follows:
A device is not provided at a place that becomes dirty with dust collection, and not only dirt but also malfunction due to humidity, easy and low cost, and there is no fear of failure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the device portion of the present invention.

FIG. 2 is a diagram showing a light emitting portion of the dust collecting paper when it is new.

FIG. 3 is a diagram showing a light emitting unit when the dust collecting paper is dirty and is about to be replaced.

[Explanation of symbols]

 1 Main body part 2 Dust collecting paper 3 Holes drilled in the device body 4 Light emitter 5 AC power supply 6 Outer frame of device 7 New dust collecting paper 8 Dust collecting paper that has been soiled due to long-term use 9 Light emitting part when new dust collecting paper 10 Dust collecting paper Light emitting part when it is dirty

Claims (2)

[Claims] 1. A light emitting body 4 is attached to a back surface of the device by forming a hole 3 in a position where the dust collecting paper 2 is most easily seen from the outside, and a spot light emitting portion from the back surface of the dust collecting paper 2 by the light emitting body 4. Detects dirt on dust collection paper that forms a dust. 2. Detecting stains on a filter by forming a spot light emitting portion by a light emitter from the back surface of the filter made of non-woven fabric or the like.