JPH02211261A - Air purifying apparatus - Google Patents

Abstract

PURPOSE:To know filter replacement timing earlier by installing an electret filter rolling apparatus, an operational hour determining means, and a replacement timing displaying means. CONSTITUTION:An electret filter 6 is placed in a wavy shape by guide rolls 10, 11 so as to have a wide filtering surface area. So that, the passing speed of charged particles 17' through the electret filter 6 becomes low and it takes a long time for the charged particles 17' to pass through the electret filter 6, resulting in improved capturing efficiency. A pressure loss by the electret filter 6 is lowered. Moreover, the renewal timing of the electret filter 6 is controlled by a timer 12 and by the renewal of the filter at every prescribed operational hour T1, the good capturing efficiency is continuously maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an air cleaning device for collecting dust particles in the air.

Conventional technology The configuration of the conventional example will be explained below with reference to FIG.

In air purification, roll-type dust collection filters are sometimes used to collect dust particles. For example, JP-A-61-27
As shown in Japanese Patent No. 8322, a proposal has been made to draw out a roll-type dust collecting filter through the back side of an air suction port. This Japanese Patent Application Laid-Open No. 61-278322 will be explained with reference to FIG. 101 is the air purifier main body; 102;
Reference numeral 103 denotes an air inlet and an air outlet provided in the air cleaner 101. 104 is a fan device for air circulation, 106
106 is a roll-type dust collection filter, 106 is the part facing the air intake port of the roll-type dust collection filter, 107 is the tip of the roll-type dust collection filter, 108 is a filter outlet, and 109 is a storage part of the roll-type dust collection filter. It is.

In the above configuration, the air intake port 1 of the roll-type dust collecting filter 105 has deteriorated in dust collection performance after being used for a specified period of time.
When replacing the part 106 facing the roll dust filter 105, the unused part of the roll dust filter 105 that has been wound into a roll can be removed by pulling out the tip 107 of the roll dust filter 105 upwards. It is characterized in that it moves to the part facing the air suction port 102 and is used as a new dust collection filter.

Problems to be Solved by the Invention However, the conventional air cleaner 101 as described above has a problem in that it is not possible to know when to replace the roll-type dust collecting filter 105 until the winding process is completed.

Therefore, it has been a problem to detect the replacement timing by the end of the roll-up of the roll-type dust collecting filter.

In view of the above-mentioned problems, the present invention provides an air purifying device equipped with a means for detecting in advance when a filter should be replaced.

Means for Solving the Problem A charging section consisting of a discharge wire, a flat plate electrode, and a DC high-voltage power supply is provided on the upstream side of the air flow, and an electret filter and a winding device for this filter are provided on the downstream side. The electret filter has an operating time determining means for determining when to replace the electret filter based on the operating time of the DC power supply, and a replacement time display means for displaying when to replace the electret filter.

Effects of the present invention With the above-described configuration, the electret filter is renewed by winding it up, and the time for replacing the filter is notified in advance.

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

FIG. 1 is a schematic cross-sectional view showing the air cleaning device of the present invention.

In FIG. 1, reference numeral 1 indicates a discharge section provided on the upstream side of the airflow, and a high voltage discharge line 2. It consists of a counter ground metal plate a and a high voltage power source 4 that applies a high voltage to the high voltage discharge line 2. 6 is a dust collection section provided on the downstream side of the airflow, and is a dust collecting section 7 of the electret filter 6. Feeding unit 81
Motor 9 that performs m11 of winding section 7. Guide row/L/1o, 1 in which the electret filter 6 is arranged in a wave shape
It consists of 1. Also, the guide row /I/ on the upstream side of the airflow
1° is formed so as to be on the same straight line with respect to the counter electrode ground metal plate 3 in the airflow direction. Further, 12 is a timer 13 for measuring the operating time of the high voltage power supply 4, and 14 is an operating time determining means for determining whether the operating time exceeds a predetermined time based on a signal from the timer. This is a replacement time transmitting means for sending a signal indicating that the time to replace the electret filter 6 is approaching. Again 1
5 is a pre-filter provided on the upstream side of the airflow of the discharge section 1.
It is.

The air cleaning device configured as above will be explained using FIG. 1.2.

First, turn on the operation switch of the air purifier (stop).
l).

A high voltage (3) is applied to the high voltage discharge line 2 by the high voltage power supply 4, and a discharge current flows from the high voltage discharge line 2 to the counter ground metal plate 3, forming an ionized region. An air circulation fan device (not shown) included in the device draws suspended particles in the air into the air purifier, and first they are separated into coarse particles such as cotton lint with large particle diameters. Particles 16 are removed by a prefilter 16. The fine particles 17 that have passed through the pre-filter 15 are charged to ■ due to repeated collision ionization of electrons and ions released within the ionization area and diffusion of ions when passing through the ionization area described above, and become charged particles 17'. (step 2).

When the charged particles 17' approach the electret filter 6 arranged in a wave shape by the guide row /l/10.11, the charged particles 17'
is attracted to and collected by the electrostatic force on the e side of the dipole polarizer (stop 3).

When the charged particles 17' are collected by the electret filter 6, the collection efficiency of the electret filter 6 decreases as the operating time increases (s+tep4).

A timer 12 measures the operating time of the above-mentioned high voltage power supply 4, and drives the motor 9 every predetermined time T. This results in
The electret filter 6 is fed out from the feeding section 8, moves in a wave shape through the guide rows /l/10 and 11, and is wound up by the winding section 7 so that the upstream side of the airflow is on the inside (s+tep5).

At this time, a signal is sent from the timer 12 to the operating time determining means 13, and the operating time determining means 13 determines that the electret filter 6 has been wound a predetermined number of times n, and the high voltage power source 4
Wait until the operating time of T 1X n (stop
6).

When the operating time of the high voltage power supply 4 reaches a predetermined time T 1x n, a signal is input to the operating time determining means 13 and the replacement time transmitting means 14, and a signal indicating the replacement time of the electret filter 6 is output (stop 7).

Due to the above process, the electret filter 6 is arranged in a wave shape by the guide rows 1v10, 11, so the area of the furnace material is larger than that in the case of a flat shape, and when passing through the electret filter 6. The passing speed of charged particles 17' becomes smaller. Therefore, the time for the charged particles 17' to pass through the electret filter 6 becomes longer, and the number of charged particles 17' that can be collected by electrostatic force and mechanical force increases, improving the collection efficiency.

Furthermore, the pressure loss caused by the electret filter 6 is reduced by reducing the passing speed of the charged particles 17'. In addition, by controlling the update timing of the electret filter 6 using a timer 12 and updating it every predetermined operating time T1, the collection efficiency is maintained in a good state. Also, since the filter replacement time is displayed, you can prepare for filter replacement in advance.

Effects of the Invention As described above, the present invention provides a discharge wire, a flat plate electrode, and a charging section consisting of a DC high voltage power supply on the upstream side with respect to the air flow, and an electret filter and a winding of this filter provided on the downstream side. An air purifier comprising a replacement device, an operating time determining means for determining the replacement time of the electret filter based on the operating time of the DC high voltage power supply, and a replacement time display means for displaying the replacement time of the electret filter. Regarding the device, the following effects can be obtained.

(1) Since the motor is used to wind up the electret filter and the electret filter is automatically renewed, the exchange period for the dust collection section filter can be extended.

(2) Since the amount of winding of the selectret filter is determined based on the operating time, it is possible to know in advance when to replace the filter.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an air purifying device that is an embodiment of the present invention, Fig. 2 is a flowchart showing an example of air purification, and Fig.
The figure is a schematic diagram of a conventional air cleaner. 1...Discharge part, 2...High voltage discharge line,
3... Counter electrode ground metal plate, 6... Electret filter, 7... Winding section, 12...
... Timer, 13 ... Operation time determination means, 14 ... Replacement time communication means. Name of agent: Patent attorney Shigetaka Awano and 1 other person2-
High voltage discharge wire 3... Dimension limit 31! 1 Metal plate 4 - Height 6 - Electret filter 7 - Wearing section 12 - Timer 13 - L time judgment child actor 14--1 cross sandwich gin period Iana reverse circle F role figure figure figure

Claims (1)

[Claims] A discharge wire, a flat plate electrode, and a charging section consisting of a DC high-voltage power source are provided on the upstream side with respect to the air flow, and an electret filter is provided on the downstream side, a winding device for this filter, and replacement of the electret filter. An air purifying device comprising an operating time determining means for determining replacement time based on the operating time of the DC power supply, and a replacement time display means for displaying the replacement time for the electret filter.