JPH07513U - Filter with usage limit alarm - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to provide a filter with a usage limit alarm for accurately detecting a clogging and warning the usage limit. The filter with a usage limit alarm according to the present invention uses a coefficient changing spring whose spring coefficient becomes smaller when the filter is extended, so that the display is surely performed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter with a usage limit alarm that notifies the usage limit due to clogging of the filter.

[0002]

[Prior art]

 No conventional air conditioner filter directly detects the clogging to warn the usage limit.

[0003]

[Problems to be solved by the device]

 An object of the present invention is to solve the above conventional problems and to provide a filter with a usage limit alarm that directly detects a clogging and issues a usage limit alarm.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a diaphragm stretched in a ventilation hole of a filter medium, a coefficient changing spring whose spring coefficient is reduced when extended and a means for resisting suction of the diaphragm, and a coefficient changing spring. It proposes a filter with a usage limit alarm, which consists of a display that is displayed in relation to the growth of electricity.

[0005]

【Example】

 A filter with a usage limit alarm according to the present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows a filter of the present invention, which has a filter medium (2) mounted on an air conditioner (1).

A ventilation hole (4) is provided at an appropriate position of the filter medium (2), and a diaphragm (15) is stretched in the ventilation hole (4). The diaphragm (15) is connected to a display body (17) displaying from a window by a connecting means (16) such as a wire.

In the filter shown in the above embodiment, when the air conditioner (1) is driven, air flows in the filter medium (2).

When there is not much clogging of the filter medium (2), the differential pressure across the filter medium (2) is small. Therefore, not so much force is applied to the diaphragm (15) sucked by the differential pressure.

As a result, the coupling means (16), which is subjected to the force resisting by the coefficient changing spring (19), is pulled greatly. Here, the coefficient changing spring (19) is a spring whose spring coefficient decreases when the spring is stretched.

Next, when the clogging of the filter medium (2) becomes severe, the differential pressure across the filter medium (2) increases. As a result, the diaphragm (15) is sucked with a large pressure difference, and the connecting means (16) is pulled greatly.

As described above, when the spring of the coefficient changing spring (19) is stretched, the spring coefficient thereof becomes small, so that the connecting means (16) moves more.

This state is apparent from FIG. 2, that is, the expansion of the coefficient changing spring (19) suddenly increases and the display body (17) largely reaches the moving window for display.

The displayed position is set slightly before the position where the clogging of the filter medium (2) is saturated.

By the way, in the embodiment shown in the figure, a time counter is also incorporated, although it is incidental. That is, the other diaphragm (5) is sucked when the air conditioner (1) is driven and the switch (7) is always closed during driving.

As a result, the time counter (13) operates to count the usage time of the filter medium (2) and display it appropriately.

[0016]

[Effect of device]

 The embodiment of the filter with a usage limit alarm of the present invention is as described above, and the effects thereof are listed below. (1) In the filter of the present invention, since the coefficient changing spring is used in particular, when the clogging of the filter material becomes severe, the elongation of the spring suddenly increases and is reliably displayed. (2) Since the filter of the present invention directly detects the clogging of the filter medium, it is possible to grasp the accurate usage limit.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a filter with a usage limit alarm according to the present invention.

FIG. 2 is a diagram showing the relationship between the differential pressure of the filter of the present invention and the elongation of the spring.

[Explanation of symbols]

 1 Air Conditioner 2 Filter Material 4 Vent 5 Diaphragm 6 Connecting Means 7 Switch 9 Spring 11 Battery 13 Hours Counter 15 Diaphragm 16 Connecting Means 17 Indicator 19 Coefficient Change Spring

Claims (1)

[Scope of utility model registration request] 1. A diaphragm stretched in a ventilation hole of a filter medium,
A coefficient changing spring which is provided as a means for resisting suction of the diaphragm and has a spring coefficient which becomes small when stretched,
A filter with a usage limit alarm comprising a display for displaying the expansion of the coefficient changing spring