JPH0283048A - Air cleaner - Google Patents

Abstract

PURPOSE:To permit the replacement of a filter at an appropriate time by increasing the effective area of an electret filter, reducing the filtration velocity of this filter to reduce the pressure loss thereof and increase the dust collecting efficiency thereof and controlling the filter by a timer. CONSTITUTION:An electric discharge part 1 consisting of a discharge wire 2 and a plate electrode 3 is provided on the upstream side of air flow and an electret filter 6, together with a take-up device 7 therefor, is provided on the downstream thereof. The filter 6 is arranged in a wavy configuration transverse to an air flow passage and the replacement time thereof is controlled by a timer 12. As a result, the pressure loss of filter becomes small with improved dust collecting efficiency and the filter can be replaced at an appropriate time.

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.

BACKGROUND OF THE INVENTION Conventionally, roll-type dust collecting filters have been used to collect dust particles in air purification. For example, Tokukai Sho (31
As shown in Japanese Patent No. 278322, a proposal has been made in which a roll-type dust collecting filter is pulled out through the back side of an air suction port. This Japanese Unexamined Patent Publication No. 61-278322 will be explained with reference to FIG. 101 is the air purifier body; 10
Reference numerals 2 and 103 indicate an air intake port and an air outlet provided in the air cleaner main body 101. , 104 is a blower for air circulation, 106 is a roll-type dust collection filter, 1o6 is the part facing the air inlet of the roll-type dust collection filter, 107 is the tip of the roll-type dust collection filter, 1o8 is a filter outlet, 1Q9 is a storage part for a roll type filter.

In the above configuration, when replacing the part 106 of the roll-type dust collection filter 105 facing the air suction port 102 whose dust collection performance has deteriorated after being used for a specified time, the tip of the roll-type dust collection filter 105 must be replaced. By pulling out the dust collecting filter 107 upward, the unused part of the roll-type dust collecting filter 106 that has been wound into a roll moves to the part facing the air suction port 102, and is used as a new dust collecting filter. It becomes.

Problems to be Solved by the Invention However, in the conventional air cleaner as described above, the portion 106 of the roll-type dust collecting filter 105 facing the air suction port 102 has a flat shape, resulting in large pressure loss and There were problems in that the efficiency of collecting dust particles was poor and the filter was not updated at an appropriate time. Therefore, there is a problem that it is necessary to reduce the pressure loss and improve the dust particle collection efficiency, and to update the guilter at an appropriate time.

In view of the above-mentioned problems, the present invention provides an air purifying device that has low pressure loss and good collection efficiency, and that updates the filter at an appropriate time.

Means for Solving the Problems The air purifying device of the present invention includes a charging section comprising a discharge wire and a flat electrode on the upstream side with respect to the air flow, and
It has an electret filter provided on the downstream side and a winding device for this filter. The electret filter is arranged in a wave shape across the ventilation path, and a timer is used to control the update timing of the electret filter.

Effects The present invention has the above-described configuration, which reduces pressure loss by increasing the effective area of the electret filter and lowering the wind speed passing through the electret filter, thereby increasing collection efficiency, and by controlling with a timer, the air is collected at an appropriate time. This is to update the electret filter.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

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. Counter electrode ground metal plate 3. It consists of a high voltage power source 4 that applies a high voltage to the high voltage discharge line 2. 5 is a dust collection section provided on the downstream side of the airflow, and is a winding section 7 of the electret filter. Sending part 82
A motor 9 for driving the winding section 7. Guide rolls 10.11 for arranging the electret filter 6 in a wave shape
It consists of Further, the guide roll 1o on the upstream side of the airflow is formed so as to be on the same straight line with respect to the airflow direction with respect to the counter ground metal electrode plate 3. Also, 12 is a high voltage power supply 4
13 is a driving time determining means for determining whether the driving time exceeds a predetermined time based on the signal from the timer 12; 14 is controlling the drive of the motor 9 in response to the signal from the driving time determining means 13; motor control means,
Reference numeral 15 indicates a tachometer that measures the number of rotations of the guide roller 11 provided on the guide roll 11 on the downstream side of the air flow, and 16 indicates whether the number of rotations of the guide roll 11 exceeds a predetermined value upon receiving a signal from the tachometer 15. This is a rotation speed determining means for determining whether or not the rotation speed is high. Further, 17 is a pre-filter provided on the upstream side of the airflow of the discharge section 1.

First, turn on the operation switch of the air purifier (stop).
l). A high voltage (■) is applied to the high voltage discharge line 2 by the high voltage power supply 4, and from the high voltage discharge line 2 to the counter ground metal plate 3
A discharge current flows to form an ionized region. An air circulation fan device (not shown) included in the device draws suspended particles in the air into the air cleaning device, and first coarse particles 18 such as cotton dust with large particles are removed. It is removed by a pre-filter 17. Prefilter-1
The fine particles 19 that have passed through the ionization region 7 are charged to ■ due to the repetition of sudden ionization of electrons and ions emitted within the ionization region and the diffusion of ions when passing through the ionization region described above, and become charged particles 19.
' (+tep2).

When the charged particles 19' approach the electret filter 6 arranged in a wave shape by the guide row/l/10.11, the charged particles 19'
Static on the ○ side of the dipolar polarizer? [Attracted and collected by energy (stop 3).

When the charged particles 19' are collected by the electret filter 6, the collection efficiency of the electret filter 6 decreases as the operating time increases (stop 4).

A timer 12 measures the operating time of the above-mentioned high voltage power supply 4, and the operating time determination means 13 uses this operating time value as a signal.
The operating time determining means 13 waits for a predetermined time T1. The operating time of the high voltage power supply 4 is a predetermined time T1
, the operating time determining means 13 controls the motor controlling means 1.
4, the motor 9 starts driving. Thereby, the electret filter 6 is sent out from the delivery section 8, moves in a wave shape via the guide rolls 10.11, and is wound up by the winding section 7 so that the upstream side of the airflow is on the inside (STEPS). At this time, the tachometer 15 sends the chain of the rotation speed of the guide row A/11 as a signal to the rotation speed determination means 16, and the rotation speed determination means 16 waits until the rotation speed reaches the control speed (stop completion). The guide roll 11
When the rotational speed reaches a predetermined rotational speed, the rotational speed determining means 16 sends a signal to the motor control means 14 to stop driving the motor 9 (stop8).

Electret filter 6 has guide roll 10.11
Since they are arranged in a zigzag shape, the area of the furnace material is larger than in the case of a flat shape, and the passage speed of the charged particles 19' when passing through the electret filter 6 is reduced. Therefore, the time for the charged particles 19' to pass through the electret filter 6 becomes longer, and the number of charged particles 19' that can be collected by electrostatic force and mechanical force increases, so that the collection efficiency is improved. Also, charged particles 19'
The pressure loss caused by the electret filter 6 is reduced by reducing the passage speed of the electret filter 6 . In addition, the update time of the electret filter 6 is determined by using the timer 12 for the operating time T. -T, the collection efficiency is maintained at an appropriate value η1 or higher.

As described above, in the present invention, the guide roll 10.1
1 and the electret filter 6 is arranged in a corrugated manner, the area of the furnace material can be expanded, and the passing speed of the charged particles 19' is also small to kill the particles. Therefore, there is an effect that the collection efficiency in the electret filter 6 is improved and pressure loss can be reduced.

Furthermore, since the electret filter 6 is automatically renewed by winding it up using the motor 9, there is an effect that the filter replacement period can be extended. Furthermore, since the winding time of the electret filter 6 is controlled by the timer 12, the collection efficiency can be maintained at the appropriate value η1 or more.

Effects of the Invention As described above, the present invention provides a charging section consisting of a discharge wire, a flat plate electrode, and a DC high voltage power source on the upstream side with respect to the air flow, and an electret filter provided on the downstream side and a charging section of the filter provided on the downstream side. This air purifying device has a winding device, and the electret filter is arranged in a wave shape so as to cross an air passage, and the following effects can be obtained.

(1) Since the electret filter is arranged in a wave shape by guide rolls, the area of the furnace material is expanded.

As a result, at the same air volume, the speed of dust particles passing through the electret filter is reduced, so the dust particle collection efficiency of the electret filter is improved and the pressure is reduced.

(2) Since the electret filter is wound up using a motor roller and the electret filter is automatically renewed, the filter replacement period can be extended.

(3) Since the timer controls the winding timing of the electric filter, the compensation efficiency can be maintained at an appropriate value or higher.

[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 characteristic diagram showing the relationship between high-voltage power supply operating time and electret filter collection efficiency, and FIG. 4 is a schematic diagram of a conventional air cleaner. 1...Discharge part, 2...High voltage discharge line,
3...Counter electrode ground metal plate, 6...Electroresotofil, 7...Winding part, 12...
...Name of timer agent Patent attorney Shigetaka Awano and 1 other person, 3-A Nada Inochi 4 Nesaka 6 --- Urectre, Tofilter 7 --- Sorry; Torisa super no? -1-Daifu Takakun λtt'Ji's Toru 1 Shi Interrogation/Kuda

Claims (3)

[Claims] (1) An air purifying device that includes a discharge section consisting of a discharge wire and a flat plate electrode provided on the upstream side with respect to the air flow, an electret filter provided on the downstream side, and a winding section of the electret filter. (2) Claim 1, characterized in that the electret filter is arranged in a wave shape across the air passage.
Air purifying device as described in section. (3) Claim 1, characterized in that the update timing of the electret filter is controlled by a timer.
Air purifying device as described in section.