JPS5987014A - Apparatus for detecting clogging of filter - Google Patents

Abstract

PURPOSE:To automatically and accurately detect the clogging of a filter, by detecting the clogging of the filter from the difference of the inlet pressure and the outlet pressure of a fluid passing the filter. CONSTITUTION:The inlet pressure 4 and the outlet pressure 5 of a fluid passing a filter 2 required in order to carry out the function of installation 1 requiring the fluid are inputted to an operation apparatus 6 at constant cycles and the differential pressure P thereof is operated. In this case, it is operated whether the differential pressure DELTAP exceeds tolerant differential pressure DELTAP1 being an objective value or not and, when exceeds the objective value DELTAP1, an alarm order is issued to an alarm apparatus 7. By this alarm, the filter 2 is cleaned or replaced to keep the capacity of the filter 2 within a definite standard. As the result, an adequate filter cleaning time can be known and the lowering in the efficiency of the installation 1 or wasteful energy consumption can be prevented.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to mechanical equipment, etc. (2) The fluid used (air).

I9 detection device for filters that removes foreign matter and dirt from water, oil, etc.

[Technical background of the invention and its problems]

In general (2) mechanical equipment, etc., oil is used as a cooling and lubricant, and air and water are used for cooling coolers, etc. These fluids (oil, air,
When using water, etc., if foreign matter, dirt, etc. get mixed in, it will damage the machine, so a filter is installed to prevent foreign matter, dirt, etc.
It is necessary to remove garbage, etc. In this case, as time passes and a large amount of dust etc. adheres to the filter, it becomes clogged and the efficiency of the filter decreases.As a result, the 6LL body can no longer supply a constant amount of electricity. If the fluid is forcibly pumped (when using a filter), the rotation speed of the attached ventilation fan, water or oil pump, etc. must be increased, which consumes a lot of energy, and from the perspective of energy saving. It is unfavorable because of this.
Even in the case of forced operation, the worst problem is that forced lubrication or cooling may be insufficient, leading to overheating and burning of the pVA stock.

Traditionally, filter blemishes have been detected through experience and intuition. However, it is difficult to properly detect filter blemishes based on experience and intuition, and filter defects often occur. Was.

[Purpose of the invention]

The purpose of the present invention is to determine the size of the filter by experience or intuition (=
To provide a filter clogging 9 detection device that detects filter clogging automatically and accurately without relying on it.

2. A pressure gauge on the inlet side that measures the pressure of the fluid and a pressure gauge on the outlet side that measures the pressure of the fluid exiting the filter. and the measured values of both positive force meters PI, P
A differential pressure detection means for detecting the differential pressure △P from 2, a means for setting the flow rate Q1 to be passed through the filter (2), and a means for setting the flow rate Q1 to be passed through the filter (2); means for determining the allowable differential pressure ΔP1 corresponding to the style Q1; and a comparison unit that compares the determined allowable differential pressure ΔP1 with the differential pressure ΔP and outputs a clogging signal if ΔP>ΔPI. It is equipped with means.

[Embodiments of the invention]

The present invention will be explained in detail below with reference to an embodiment shown in the drawings. In FIG. 1, 1 represents a fluid (air).

This is equipment that requires water (oil, water, etc.). 2 is a filter, which is provided in the middle of the fluid flow path 3 to the device 1. 4 is a pressure gauge on the inlet side and measures the inlet pressure of the fluid passing through the filter 2. 5 is a pressure gauge on the outlet side. , filter-2
Measure the outlet pressure of the fluid passing through the tube. 6 is an arithmetic and control unit (hereinafter referred to as CPU), which inputs the measured value of the pressure gauge 4.5 and performs arithmetic processing (to detect the blindness of the second shift filter 2), which will be described later. 7 is an alarm device; An alarm is issued in response to the clogging signal output from the CPU 6.

FIG. 3 shows the relationship between the lid S of the filter 2 shown in FIG. 1 and the differential pressure ΔP (difference between the inlet pressure P1 and the outlet pressure P2) of the two corresponding filters 2. From this figure, it can be seen that as the clogging amount S increases, the differential pressure △P increases. Fig. 4 shows the relationship between the clogging amount S and the corresponding fluid passage tQ of the filter 2. From this figure, it can be seen that as the blinding amount S increases, the filter passing amount Q decreases.

Next (20 The functions of PU 6 will be explained from Figure 2 (2). 6
Reference numeral 1 denotes a *1f output means which detects a pressure difference ΔP between the inlet pressure P1 measured by the pressure gauge 4 shown in FIG. 1 and the outlet pressure P2 measured by the pressure gauge 5. Here, △P =
l Ps P2 1. 62 is a flow rate setting means;
In order for equipment 1 to perform its function (2) required filter passing flow rate Q
Setting of 1 (2 is used. Here, the flow rate Qt is the machine etc. (-
Therefore, it is a determined world, and it is known. Reference numeral 63 denotes allowable differential pressure determining means, which includes a means 63a for setting the characteristics shown in FIG. , 1-that is, the change in the differential pressure △P corresponding to the clogging rate S.
3b, from which flow rate setting means 62 (2) required flow rate Q1i, 2. corresponding allowable differential pressure ΔP.
Determine 1. Reference numeral 64 compares the allowable differential pressure ΔP1 determined by the comparing means-C, the allowable differential pressure determining means 63i, and the actual differential pressure ΔP determined from the differential pressure detecting means 61 (2), and calculates ΔP. > If ΔP1, a clogging output occurs.

Here, the relationship between the passage style Q and the clogged rat S shown in FIG. of fluid (■
and the characteristics of the filter 2 (2) can be determined individually υ. 62 (2 υ, the required 1 - passing flow tft Q+ is determined, it (2 corresponding blinds') tSt is determined by the CPU 6 (
It can be determined by two. Furthermore, the differential pressure ΔP1 is determined from the relationship shown in FIG. 3. This differential pressure ΔP1 is the allowable differential pressure when passing the required flow itQt.

On the other hand, since the actual differential pressure ΔP generated by the filter 2 has been determined by the red pressure detecting means 61, these pressures ΔP and ΔP1 are compared.

If the result of A, ilI is △P≦△P1, then it is considered that the blind spot 9 has not occurred. In contrast, if ΔP>△Pl, the clog 9 is worse than the permissible clog Sl (2). In this case, the fluid θii: Ji '-2s is not supplied, and the filter 2 is When I woke up the alarm clock, I output the message to the alarm clock (i5) and activated the alarm device 7 shown in Fig. 1.

Here, in order to obtain the ME sum Q+ passing through the filter 2, which is necessary for the equipment 1 shown in FIG.
It is necessary that P is always p smaller than the allowable differential pressure △P1. In order to achieve the above conditions, the CPU 6 inputs the inlet pressure 4 and outlet pressure 5 of the filter 2 at regular intervals.
The differential pressure ΔP is calculated, and the running pressure ΔP is 4:A1. Calculate whether the allowable differential pressure ΔP1 is exceeded and set the target value △
If P1 is exceeded, the alarm device 7 (2 alarm command lights) will be activated.In response to this alarm, clean the filter or replace it to keep the filter performance within a certain standard. It is possible to maintain (secondary)

[Young fruit of Kaimei]

The present invention operates in two ways as described above, and by setting the required amount of filter passage, the differential pressure of the filter can be calculated, and the appropriate filter τ cleaning time can be determined.
It has the advantage of not reducing equipment efficiency or wasting energy consumption.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing an embodiment of a filter clogging detection device according to the present invention (2), Fig. 2 is a diagram clearly showing the structure of the present invention, and Figs. 3 and 4 are in accordance with the present invention. FIG.

Claims (1)

[Claims] A device to detect clogged filters that allow fluid to pass through! (=, there are two pressure gauges on the inlet side that measure the pressure of the fluid and the pressure gauges on the outlet side that measure the pressure of the fluid exiting the filter, and the measured values Pi of these pressure gauges,
differential pressure detection means for detecting the differential pressure ΔP from Pz; means for setting the flow rate Q1 to be passed through the filter; means for determining an allowable differential pressure ΔP! corresponding to the above, and a comparing means for comparing the determined allowable differential pressure ΔP1 with the differential pressure ΔP and outputting a blinding signal if ΔP>ΔP1. A filter blind detection device characterized by comprising: