CN106178705A

CN106178705A - Air purifier

Info

Publication number: CN106178705A
Application number: CN201510422806.4A
Authority: CN
Inventors: 金泽大介; 盐家洋; 盐家洋一; 蛭田康之
Original assignee: Hitachi Appliances Inc
Current assignee: Hitachi Appliances Inc
Priority date: 2014-08-29
Filing date: 2015-07-17
Publication date: 2016-12-07
Also published as: JP2016050685A

Abstract

It is an object of the invention to provide and be capable of compareing the operating control of particle diameter and cheap air purifier.This air purifier has: the filter unit purifying the air circulated；It is arranged on the downstream of above-mentioned filter unit and attracts the fan motor of above-mentioned air；The detection of particulates of dust is converted to the signal of telecommunication and carries out the dust sensor unit detected；And control the control portion of the rotating speed of said fans motor, this dust sensor unit is utilized to carry out the droplet measurement of dust, in electric signal waveform based on particle diameter, to exceeding the H signal of threshold value and counting less than the combination of the L signal of threshold value, control fan motor rotating speed according to the number of times of the above-mentioned counting in certain period.

Description

Air purifier

Technical field

The invention mainly relates to air purifier.

Background technology

In recent years, it is tested with the PM2.5 without Air Pollutants and the demand that is removed is continuously increased.

Japanese Unexamined Patent Publication 2008-194603 publication is there is as prior art.It is following system, detects The particle diameter of dust, according to particle diameter make blowout BAIYE angle and suck cap opening and closing particle diameter based on dust and The presence or absence of foul smell controls air-flow, is consequently formed the size with dust, the mixed of foul smell deposits corresponding indoor following Ring air-flow also guides the suction inlet to main body efficiently such that it is able to purify indoor glibly.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2008-194603 publication

Summary of the invention

Invent problem to be solved

Especially in the case of the detection of PM2.5 is detected, need to detect the particle diameter of dust and not It is to have free from dust.In the case of the operating of air purifier based on particle diameter is controlled, just measure grain For the situation in footpath, it may be considered that use the method that both finished product carries out detecting of particle sensor etc..But, If using particle sensor etc., then may result in air purifier self and become expensive.Due to existing Detection method is not the system differentiating particle diameter, it is therefore desirable to divert both finished products.It is an object of the invention to The operating being capable of compareing particle diameter is provided to control and cheap air purifier.

For solving the scheme of problem

To achieve these goals, air purifier involved in the present invention is characterised by having: convection current Logical air carries out the filter unit purified；It is arranged on the downstream of above-mentioned filter unit and attracts above-mentioned sky The fan motor of gas；The detection of particulates of dust is converted to the signal of telecommunication and carries out the dust sensor list detected Unit；And the control portion of the rotating speed of control said fans motor, utilize this dust sensor unit to carry out dust The detection of particle diameter, in electric signal waveform based on particle diameter, to exceeding the H signal of threshold value and less than threshold value The combination of L signal count, control said fans according to the number of times of the above-mentioned counting in certain period The rotating speed of motor.

The effect of invention

In accordance with the invention it is possible to provide a kind of air purifier, its operating being capable of compareing particle diameter controls And it is cheap.

Accompanying drawing explanation

Fig. 1 (a) is the front view of the air purifier of embodiment, and (b) is that the line A-A of (a) cuts open View.

Fig. 2 is the axonometric chart of the air purifier representing embodiments of the present invention.

Fig. 3 is the exploded perspective view of the air purifier of embodiment.

Fig. 4 is the figure of the dust sensor unit representing embodiment.

Fig. 5 is the figure representing the existing dust detection waveform with embodiment.

In figure:

1 air purifier, 2 outlets, 3 guidance panels, 5 filter units, 5a coarse filter, 114 A, 7 fan motors, 9 desiccant, 11 condensers, 80 dust sensor unit, 111 light accepting parts, 112 illuminating parts, 113 heating parts, 50 (51～59) operation button.

Detailed description of the invention

Hereinafter, with reference to the accompanying drawings embodiments of the invention are illustrated.

Fig. 1 is the front view of the air purifier of embodiment.

Fig. 3 is the exploded perspective view of the air purifier of embodiment.

As it is shown on figure 3, air purifier is mainly by display part 60, filter unit 5, condensation part 11, gasification Filter unit 15, desiccant portion 9, heating part 33,34, fan motor portion 7, outlet 2, dust pass Sensor cell 80 is constituted.When carry out air cleaning operating time, in Fig. 4 circulate wind 111a through filter unit 5, Condenser 11, and advance to desiccant 9.Air through desiccant 9 is attracted and from discharge by fan motor 7 Mouth 2c discharges.

In automatic operation mode, detect the many, few of dust by dust sensor unit 80, tie according to it Fruit controls the rotating speed of fan motor 7.In the case of detecting that dust is more, control software is utilized to be had Some argument tables improve rotating speed, in the case of detecting that dust is less, utilize and control what software was had Argument table reduces rotating speed.

Fig. 4 is the top view of the dust sensor unit representing embodiment.

Fig. 5 is the electric signal waveform of the dust sensor unit from embodiment.

In the present embodiment, dust sensor unit 80 has light accepting part 111, illuminating part 112 and heating part 113.Illuminating part 111 irradiates light, and light accepting part 111 receives light, and heating part 113 is heated in dust sensor unit Air.

Light accepting part 111 is arranged at the position of the light not direct irradiation from illuminating part 112 irradiation (not from illuminating part Position on the extended line of the progress path (optical axis A) of 112 light irradiated).Heating part 113 is positioned at dust Bottom in sensor unit 80.Illuminating part 112 and light accepting part 111 are positioned at ratio in dust sensor unit 80 Heating part 113 is top.Point A in Fig. 4 be from illuminating part 112 irradiate light progress path (optical axis A) with The intersection point of the progress path (optical axis B) of the light that light accepting part 111 receives.

Detection to the dust carried out by dust sensor unit 80 illustrates.When dust enters dust sensing During device unit 80, air is heated by heating part 113 together with dust.Heated by heating part 113 Air forms ascending air, and the dust in air is also ascended to heaven near an A114.Irradiate from illuminating part 112 Light is irradiated on the dust ascended to heaven near an A, dust the light reflected enters light accepting part 111, thus can Enough detect dust.

It is in dust sensor unit 80 so that an A is not located at the bottom in dust sensor unit 80 The mode at interior middle part, arranges the optical axis A of the illuminating part 112 and optical axis B of light accepting part 111.This is to subtract Few arrange in the way of be positioned at the bottom of dust sensor unit 80 by an A in the case of, ash disposal dirt with The probability that the outer such foreign body of image-stone block also can be detected in the case of entering.Additionally, at dust sensor Bottom in unit 80 arranges heating part 113.By the bottom in dust sensor unit 80, heating is set Portion 113, and be configured (being positioned at an A in the way of an A is positioned at the middle part of dust sensor unit 80 The mode more top than heating part 113 is arranged), thus have the effect that, i.e., it is capable of detecting when because of heating Portion 113 and dust in the air-flow (ascending air) ascended to heaven.

The light received by light accepting part 111 is converted into the signal of telecommunication, as it is shown in figure 5, form particle diameter based on dust The electric signal waveform of size.

The detection of waveform is that the detection time of waveform is set to 1ms, and the moment exceeding threshold value Va at peak value sets up The labelling of " H ", samples in the 1ms of each detection time, sets up in the moment less than threshold value Va The labelling of " L ", measures the time t from " H " to " L ".In the electric signal waveform example described in Fig. 5, At the labelling of the initial foundation " H " of t1, t2, t3, the labelling of " L " is set up in the ending at t1, t2, t3.

Here, in order to improve the detection sensitivity of dust, the value close to 0V is preferably set the threshold to. But, if being too close to the value of 0V, then there is also and detect that noise judges the risk of increase by accident.Example As, by about 0.9V is set to threshold value, then can improve sensitivity and reduce erroneous judgement.

Proportionate relationship is there is in the particle diameter of dust with the length of time t.I.e., big the most then time t is elongated for the particle diameter of dust, Particle diameter is little, and the time, t shortened.

By detecting that one group " H " and " L " will detect counting how many times for once.But, at " H " Signal continues in the case of more than 60ms (time t is the situation of more than 60ms), to be then judged to the grain of dust Footpath is more than 2.5 μm, and the counting of detection number of times does not counts.

By above-mentioned algorithm, the detection number of times in certain period is counted, according to the number of times of counting, control The rotating speed of fan motor 7.Such as, by above-mentioned algorithm, one minute interior detection number of times is counted, In the case of detecting the counts of 60 times, then it is judged to that the dust that particle diameter is below 2.5 μm is more, with The rotating speed of fan motor 7 becomes the mode of maximum (top) speed and is controlled, in order to form maximum quantity of wind.Controlling Software arranges chart, for each detection number of times, controls turning of fan motor 7 according to this detection number of times Speed.Within each minute, repeat above-mentioned judgement, and control rotating speed according to judgement.Interior detection in a minute In the case of number of times is less than 20 times, then it is judged to that the dust that particle diameter is below 2.5 μm tails off, in being formed The mode of air quantity controls the rotating speed of fan motor 7.

As it has been described above, have the effect that, using the teaching of the invention it is possible to provide cheap air purifier, it has: to circulation Air carry out the filter unit 5 that purifies；It is arranged on the downstream of filter unit 5 and attracts the wind of air Fan motor 7；The detection of particulates of dust is converted to the signal of telecommunication and carries out the dust sensor unit 80 detected； And the control portion of the rotating speed of control fan motor 7, utilize dust sensor unit 80 to carry out the grain of dust Footpath is detected, in electric signal waveform based on particle diameter, to exceeding the H signal of threshold value and being less than the L of threshold value The combination of signal counts, and controls fan motor 7 according to the number of times of the above-mentioned counting in certain period Rotating speed, thus realize compare particle diameter operating control.

Claims

1. an air purifier, it is characterised in that have:

The filter unit that the air of circulation is purified；It is arranged on the downstream of above-mentioned filter unit and inhales Draw the fan motor of above-mentioned air；The dust detection of particulates of dust being converted to the signal of telecommunication and carry out detecting passes Sensor cell；And the control portion of the rotating speed of control said fans motor,

This dust sensor unit is utilized to carry out the detection of particle diameter of dust,

In electric signal waveform based on particle diameter, to exceeding the H signal of threshold value and being less than the L signal of threshold value Combination count,

Number of times according to the above-mentioned counting in certain period controls the rotating speed of said fans motor.

Air purifier the most according to claim 1, it is characterised in that

Above-mentioned dust sensor unit has illuminating part, light accepting part and heating part,

In above-mentioned dust sensor unit, from the progress path i.e. optical axis A of the light that above-mentioned illuminating part irradiates The progress path i.e. intersection point of optical axis B of the light received with above-mentioned light accepting part is arranged to be positioned at than above-mentioned heating part Top.