CN1207953A

CN1207953A - Ionizing type air cleaner

Info

Publication number: CN1207953A
Application number: CN 97117602
Authority: CN
Inventors: 康斯坦丁诺斯J·约安诺
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-11
Filing date: 1997-08-11
Publication date: 1999-02-17

Abstract

This invention relates to an ionizing type air cleaner having ionizing needles and a collector element. The collector element is made of either many conducting elements with isolating resistors or a single high resistivity element in order to prevent electric shock when touched. Users are protected from the ionizing needle by a surrounding guard which does not reduce the production of ions.

Description

Ionizing type air cleaner

The present invention relates to a kind of air purifier that uses the ionization principle to adsorb dust.

Ionizing type air cleaner under the present invention comprises a Charge Source, and its form can be that electronegative ionization needle and is positioned near the positively charged dust-precipitator of ionization needle.

Generally, dust-precipitator is a kind of good conductor of electricity, and it launches a very big surface to ambient air.Ionization needle sends electronics, makes negative electrical charge on ambient air molecule and the dust granule band wherein.Then, electronegative dust granule is adsorbed on the positively charged dust-precipitator and collects.

The used voltage of this class air purifier is about the order of magnitude of 10-20 kilovolt.

A shortcoming of the air purifier of existing type is that its dust-precipitator is to work under the higher voltage relatively, and because size is bigger, has enough electric capacity, storing sufficient electric charge, thereby can produce electric shock to the people who contacts them.Promptly use high resistance that dust-precipitator and power supply are separated, this situation still exists.Another shortcoming is that ionization needle may injure the user of this device, unless surround ionization needle in case the people touches them with guard rail.

An object of the present invention is to provide a kind of ionizing type air cleaner that does not have above-mentioned shortcoming and need not sacrifice the air purifier performance.Another object of the present invention is for single or multiple ionization needles provide single or multiple guard rails, with the protection user, can not reduce the performance of air purifier simultaneously.

Following description earlier total form of the present invention then refers again to accompanying drawing, describes its embodiment in detail by specific embodiment.These embodiment are used for illustrating principle of the present invention and embodiment thereof.Then, in every claim, further describe and define the wideest also all more specifically forms of the present invention.

The present invention includes a kind of ionizing type air cleaner, it has an electronegative ionization source and the dust-precipitator surface, positively charged that gathers dust is arranged, this dust-precipitator has the discharge restraint device, prevent from the user who touches the dust-precipitator surface is produced uncomfortable electric shock, and be provided with special ionization needle guard rail, in case it injures the user of this air purifier.

Dust-precipitator can be built into an assembly by many current-carrying parts that separate with seal each other, thereby the electric capacity of the each several part of assembly, and they are reduced to the ability that the user sends electric shock.Perhaps, dust-precipitator can be made of the identical high resistivity material of a kind of function.

Principal character of the present invention and form that some can Gong select for use thereof have more than been summarized.To the description of preferred embodiment, can further understand the present invention by with reference to the accompanying drawings.

Fig. 1 represents a kind of band ionization needle commonly used and the ionizing type air cleaner of dust-precipitator.

Fig. 2 is the line map of device shown in Figure 1.

Fig. 3 represents that a kind of its dust-precipitator is the ionizing type air cleaner that is made of many fractions.

Fig. 4 is the line map of device shown in Figure 3.

Fig. 5 represents a kind of ionizing type air cleaner with the high resistivity dust-precipitator.

Fig. 6 is the line map of device shown in Figure 5.

Fig. 7 represents the evolution from circuit shown in Figure 4 to circuit shown in Figure 6.

Fig. 8 is the cutaway view of the dust-precipitator of this band conductive substrate type shown in Figure 5.

Fig. 9 is the conspectus of device shown in Figure 8.

Figure 10 represents a kind of traditional ionization needle guard rail.

Figure 11 represents a kind of new method air purifier performance, the protection ionization needle that do not influence.

Figure 12 represents that guard rail shown in Figure 11 is installed on the air purifier.

In Fig. 1 and Fig. 2, show ionizing type air cleaner 1 commonly used in a kind of prior art.Ionization needle 2 links to each other with the negative pole of high voltage source 10 by a high value resistor 12.The dust-precipitator 3 that conductive material is housed links to each other with the positive pole of high voltage source 11 by another high value resistor 13.Between these two power supplys an earth connection 20 is arranged.In general, two

power supplys

10,11 provide a voltage difference between ionization needle 2 and dust-precipitator 3.

In this traditional device, ionization needle 2 and dust-precipitator 3 all are exposed to outer.Because the high pressure and the rated capacity thereof at dust-precipitator 3 places, if the people touches dust-precipitator 3, he or she will be subjected to a faint electric shock.This electric shock is built up electric charge on dust-precipitator 3 and is put on the staff suddenly and causes.Ionization needle 2 can not cause the injury of such discomfort substantially, because it is isolated by resistance 12, and because its size is less, does not have enough electric capacity how to store sizable quantity of electric charge.

In order to reduce or to eliminate above-mentioned electric shock as far as possible, the present invention adopts two schemes feasible, equivalence.A scheme (seeing Fig. 3 and Fig. 4) is to constitute dust-precipitator 3 with many little current-carrying parts 14 that separated by an insulating materials 20 each other.Each part 14 has only a very little electric capacity, and all links to each other with power supply 11 by a high value resistor 15.Utilize this method, the people who touches dust-precipitator 3 once can only touch dust-precipitator 3 a spot of several sections 14.

Because electric capacity is very little, each part 14 can only be emitted very little electric current.Like this, can make electric shock reduce to bottom line.

Another scheme (seeing Fig. 5 and Fig. 6) is to make dust-precipitator 3 with a kind of material 16 of high resistivity, and this material has the resistivity that for example is about every square centimeter of 106-1012 ohmage magnitude.Such material is not non-conductive fully.It can become to assign to make it to have faint electric conductivity by adding polymer plastic.This structure can prevent that uncomfortable electric discharge phenomena are made us in generation between dust-precipitator material 16 and the staff that contacts it, because high resistivity material 16 can stop the electric charge of any significant quantity to flow on the staff suddenly from dust-precipitator.Simultaneously, the performance of device can not be subjected to remarkable influence, because normally the magnitude of current by dust-precipitator 16 is very little, is about several microamperes the order of magnitude.

Therefore, the voltage drop on dust-precipitator surface (I * R pressure drop) is with minimum.

Fig. 7 shows a series of three kinds of circuits, the evolution of expression from circuit shown in Figure 4 to circuit shown in Figure 6.Fig. 7 represents, at the high resistance at limit place but in fact the dust-precipitator 16 of conduction is equivalent with the many current-carrying parts that separate 14 that separate with each resistance 15.

Fig. 8 also shows a kind of conductive substrate 17 that is added on the high resistivity dust-precipitator 16.Substrate 17 can be made of metallic plate or conductive coating.High voltage offers all dust-precipitators 16 by substrate 17, as shown in Figure 9.The effect of conductive substrate is to guarantee that any expose portion on high resistivity dust-precipitator 16 surfaces is identical to the distance of high voltage input electrode (being substrate 17), so that above-mentioned I * R pressure drop is more even on whole exposed surface.

If do not use conductive substrate, with being connected of high voltage source will be on dust-precipitator certain place a bit.This makes distance between the each point on the exposed surface of dust-precipitator 16, and great changes have taken place, thereby distance naming a person for a particular job farthest has bigger I * R pressure drop than nearest point.This just has such influence, that is, the surface potential of I * R pressure drop smaller part will be higher than the surface potential of I * R pressure drop larger part.The result is that high potential point absorption dust is more more effective than electronegative potential point absorption dust.Utilize additional conductive substrate 17, can make air purifier more effective, the absorption dust is more even.

The above content that discloses proposes the protection user and avoids electric shock, simultaneously, also must provide protective device in case staff must be made ionization needle 2 scratches of tip shape.

Figure 10 shows a kind of traditional ionization needle 2 means of defences.The pin guard rail 21 that is well 13 shapes is to be made by plastic insulation material, it be centered around ionization needle 2 around, and the same high with pin 2 at least.But if ionization needle 2 is positioned at the inboard of ring well, the electric charge identical with ionization needle polarity will be adsorbed on the inwall of well, and this electric charge in the well can reduce the voltage gradient around the ionization needle.When this phenomenon takes place, if voltage is not risen to a value higher, that may cause injury, ionization needle can not be emitted ion.

For reduce this influence as far as possible, the pin guard rail among the present invention is to be made of buttress shaft 22 or projection 22, they be centered around ionization needle 2 around, it is enough to highly prevent that staff is easily by pin 2 scratches.Even this pillar 22 adsorption charges, but they are very little over against the total surface area of ionization needle, can not produce substantial influence to the voltage gradient at ionization needle place.Utilize this method, ionization needle is protected by jube on every side, can not build up on this jube and hinder the electric charge that ionization needle 2 forms ions.

More than be description, illustrated how to use the present invention and it is put to practicality the present invention's one specific embodiment.These embodiment are only with presenting a demonstration.In following appending claims, further narrate and define the wideest also aspects more specifically of scope of the present invention.

These claims and used language thereof should be understood from the meaning of various versions of the present invention described above.They should not be limited to these versions, and should be considered to the four corner that content included that covers the present invention and disclosed.

Claims

1. ionizing type air cleaner comprises:

(a) one in air, produce ionization source ion, that be protruding needle-like;

(b) dust-precipitator, the ion that its outer surface absorption of gathering dust is produced;

(c) power supply that high voltage differential is provided between described ion gun and described dust-precipitator, the described surface of gathering dust has enough electromotive forces and adsorbs dust, but it comprises the discharge restraint device, prevents to discharge a large amount of electric charges to the user of contact dust-precipitator surface and ground connection;

(d), prevent to keep the generation of ion not suppressed simultaneously because of contacting the unexpected injury that prominent pin causes around prominent pin protective device on every side.

2. ionizing type air cleaner as claimed in claim 1, it is characterized in that, comprise a plurality of conducting elements, described conducting element is separated by an electrically insulating material each other, each described conducting element links to each other with described power supply by each high value resistor, thereby the electric capacity of any point is not enough to cause the electric shock of making us uncomfortable to contacting this surperficial user on the dust-precipitator surface.

3. ionizing type air cleaner as claimed in claim 1, it is characterized in that, described dust-precipitator is by a kind of high resistance but be not that complete non electrically conductive material constitutes, thereby formed electric charge can not flow to the point that discharge takes place because of user's contact soon on the outer surface of described dust-precipitator, can not cause the electric shock of making us uncomfortable to this user.

4. as claim 1,2 or 3 described ionizing type air cleaners, it is characterized in that described power supply provides the ionization source that has the following ionization potential of zero potential, and the dust-precipitator that has the above dust suction positive charge of zero potential.

5. ionizing type air cleaner as claimed in claim 2, it is characterized in that, include a Charge Source surface on the described dust-precipitator, it separates with the surperficial symmetry of gathering dust outward, this Charge Source surface is relatively than tool electric conductivity, to be provided at the surface of gathering dust that has relative constant potential on the whole surface.

6. as claim 1,2,3,4 or 5 described ionizing type air cleaners, it is characterized in that described protective device is a kind ofly to be made of one or more thin, projection, nonconducting parts, very close to the guard rail of described prominent pin.

7. as claim 1,2,3,4 or 5 described ionizing type air cleaners; it is characterized in that; described protective device is one group of vertical projection of two or more non-conducting materials; they near but do not contact with ionization needle; the space is left in the centre, and described projection is the same with ionization needle at least basically high.