WO2013084601A1

WO2013084601A1 - Electrostatic atomizing apparatus

Info

Publication number: WO2013084601A1
Application number: PCT/JP2012/077046
Authority: WO
Inventors: 祐花里中野; 矢野　武志; 豊裏谷; 英聖上垣; 誠之鈴木; 小幡　健二; 須川　晃秀
Original assignee: パナソニック株式会社
Priority date: 2011-12-08
Filing date: 2012-10-19
Publication date: 2013-06-13
Also published as: JP2013119076A

Abstract

Disclosed is an electrostatic atomizing apparatus, wherein an electrostatic atomizing section (4), a high-voltage applying section (5), a power supply section (6) for a heat conversion means, and an air blowing section (7) are configured on a same circuit board (8), and are provided in a case (13). The case (13) is provided with an air inlet (9) for sucking air, and a discharge section (10) for discharging electrostatically charged fine particle water generated by means of the electrostatic atomizing section (4), and the electrostatic atomizing apparatus is configured such that an air blowing path (11) is formed, said air blowing path having air flowing to the air inlet (9), the air blowing section (7), the electrostatic atomizing section (4), and the discharge section (10) in this order by means of air blowing performed by the air blowing section (7). A heat generating circuit component (12) of the power supply section (6) is disposed at a position outside of an air blowing path (11). With the configuration, size of the electrostatic atomizing apparatus is reduced, and influence of heat of the heat generating circuit component to the electrostatic atomizing apparatus is suppressed.

Description

Electrostatic atomizer

The present invention relates to an electrostatic atomizer.

Conventionally, there is an electrostatic atomizer as disclosed in Japanese Patent Publication No. 2007-117971, for example.

The electrostatic atomizer shown in the above document generates an electrostatic field in order to electrostatically atomize the water supplied to the discharge electrode and the electrostatic atomization unit including the discharge electrode and the heat exchange means. The high voltage application part, the ventilation part for cooling the thermal radiation part of a heat exchange means, and a ventilation and water supply control part are provided.

The blower and water supply control unit controls the blower unit and controls the operation of the Peltier unit that constitutes the heat exchange means, and includes a booster circuit for controlling the operation of the Peltier unit. A heating circuit component such as a diode that generates heat when current is applied is provided. *

When the heat generating circuit component generates heat, the heat may heat the air around the discharge electrode. When the air around the discharge electrode is warmed, water is effectively supplied to the discharge electrode based on the moisture in the air. It becomes difficult to do.

For this reason, in the above document, the electrostatic atomization unit, the high voltage application unit, the air blowing unit, the air blowing and the water supply control unit are each made into a block and separately incorporated in the case, and the blocks are separated from each other. The influence on the block is controlled.

This makes it difficult for the heat of the heat generating circuit components provided in the air blowing and water supply control unit to affect the discharge electrode.

However, in this conventional example, the electrostatic atomization unit, the high voltage application unit, the air blowing unit, the air blowing and the water supply control unit are separately incorporated in the case and fixed separately from each other, Assembling is complicated, the manufacturing cost is increased, and the apparatus is increased in size.

Therefore, an object of the present invention is to provide an electrostatic atomizer that can be miniaturized, is easy to assemble, and can suppress the influence of heat of the heat generating circuit components on the discharge electrode.

The electrostatic atomization device of the present invention includes an electrostatic atomization unit having a discharge electrode and heat exchange means for generating condensed water based on moisture in the air and supplying water to the discharge electrode; A high voltage application unit for generating a strong electric field to electrostatically atomize water supplied to the discharge electrode, a power supply unit for supplying power to the heat exchange unit, and the heat exchange unit A blower for supplying and cooling wind; and a case for housing the electrostatic atomizer, the high voltage application unit, the power supply unit, and the blower in the electrostatic fog. The high voltage application unit, the power supply unit, and the air blowing unit are mounted on the same circuit board, the circuit board is disposed in the case, and the electrostatic atomization is performed on the case. An air intake port through which air for supplying air to the unit is sucked, and the charged fine particles generated by the electrostatic atomizer A discharge part for discharging the child water is provided, and the air blowing part is disposed between the air suction port and the electrostatic atomizing part on the circuit board, and the air is sucked by the air blowing by the air blowing part. A blowing path through which air flows is formed in the order of the mouth, the blowing section, the electrostatic atomizing section, and the discharging section, and a large current flows through the power supply section during operation of the electrostatic atomizing section. The heat generating circuit component that generates heat is included, and the heat generating circuit component is disposed on the circuit board at a position away from the air blowing path.

In this electrostatic atomizer, it is preferable that a heat dissipating part is provided near the heat generating circuit component.

In this electrostatic atomizer, it is preferable that one or a plurality of heat radiating portions are provided in the middle of a heat conduction path between the heat generating circuit component and the electrostatic atomizing portion.

In this electrostatic atomizer, it is preferable that the electrostatic atomizer and the blower are provided on the front side of the circuit board, and the heat generating circuit component is provided on the back side of the circuit board.

In the electrostatic atomizer, when the circuit board is viewed in plan, one or a plurality of heat dissipating portions are provided along a straight line connecting the heat generating circuit component and the electrostatic atomizing portion. preferable.

In this electrostatic atomizer, the inside of the case is divided into a first region and a second region by the circuit board, and the air blowing path is formed on the first region side, and the heating circuit The part is preferably arranged on the second region side.

In the present invention, the electrostatic atomization unit, the high voltage application unit, the power supply unit for heat exchange means, and the air blowing unit are configured on the same circuit board, and the circuit board is provided in the case. The downsizing device can be miniaturized and assembly is facilitated. In addition, in order to enable downsizing, the heat generating circuit components are arranged at positions away from the air flow path even though each component is configured on the same circuit board. Can suppress the influence on the discharge electrode, and can stably generate condensed water.

Preferred embodiments of the invention are described in further detail. Other features and advantages of the present invention will be better understood with reference to the following detailed description and accompanying drawings.
It is a plane sectional view of the electrostatic atomizer concerning the embodiment of the present invention. It is a longitudinal cross-sectional view of the electrostatic atomizer which concerns on embodiment of this invention. It is sectional drawing of the state by which the electrostatic atomization part in the electrostatic atomizer which concerns on embodiment of this invention, the ventilation part, and the cover are hold | maintained at the circuit board. It is a perspective view of the electrostatic atomization part of the electrostatic atomizer which concerns on embodiment of this invention. It is sectional drawing of the electrostatic atomization part of the electrostatic atomizer which concerns on embodiment of this invention. It is sectional drawing of the electrostatic atomizer which concerns on other embodiment of this invention. It is sectional drawing of the electrostatic atomizer which concerns on other embodiment of this invention.

Hereinafter, an electrostatic atomizer 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The electrostatic atomizer 1 of this embodiment includes an electrostatic atomizer 4, a high voltage application unit 5, a power supply unit 6 that supplies power to a heat exchange unit (heat exchange means) 3 to be described later, and heat The air supply part 7 for supplying a wind to the replacement | exchange part 3, and cooling it, the circuit board 8, and the case 13 are provided. The circuit board 8 is mounted with the electrostatic atomization unit 4, the high voltage application unit 5, the power supply unit 6 and the air blowing unit 7, and the circuit board 8 is housed in the case 13. *

The electrostatic atomization unit 4 includes a discharge electrode 2, a heat exchange unit (heat exchange means) 3 for generating condensed water based on moisture in the air and supplying water to the discharge electrode 2, and the discharge electrode 2. And an atomizing casing 15 in which the heat exchanging unit 3 is incorporated.

The heat exchange unit 3 is composed of a Peltier unit.

The atomizing casing 15 is made of a synthetic resin and includes a counter electrode 20 as shown in FIG. 3C.

The counter electrode 20 is formed in a ring shape, and the center of the ring is located on the extension line of the axis of the discharge electrode 2.

The Peltier unit constituting the heat exchanging unit 3 includes a plurality of thermoelectric elements 16. 3A to 3C, as the thermoelectric element 16, a P-type Peltier element and an N-type Peltier element are used. The end portion of the P-type Peltier element and the end portion of the N-type Peltier element are fixed to the back surface of the connecting portion 17 made of a flat conductive material, and the end portion on the connecting portion 17 side of the Peltier element ( The upper end portion in FIG. 3C is the cooling side, and the end portion (the lower end portion in FIG. 3C) opposite to the connecting portion 17 of the Peltier element is the heat dissipation side.

The discharge electrode 2 with a sharp tip protrudes from the surface side of the connecting portion 17, and the discharge electrode 2 is cooled by cooling the cooling side of the heat exchange portion 3.

A heat-dissipating current-carrying portion 23 that dissipates current and heat is joined to the end (the lower end in FIG. 3C) on the heat-dissipation side of the thermoelectric element 16 that forms a pair of P-type and N-type. As shown in 3 </ b> C, the heat-dissipating energizing part 23 projects outside the atomizing casing 15.

The heat-dissipating energizing section 23 has a heat-dissipating function and a function of energizing the thermoelectric element 16.

As shown in FIG. 3B, the heat-dissipating current-carrying portion 23 protrudes in an L shape from the side surface of the atomizing casing 15, thereby ensuring a wide heat-dissipating area while minimizing the side protrusion length from the side surface as much as possible. I can do it. The distal end portion of the heat radiation energizing portion 23 is a connection terminal portion 22.

The atomizing casing 15 has an opening at a first end 15a (a right end in FIG. 3A and an upper end in FIGS. 3B and 3C) on the side where the counter electrode 20 is located, and a second end 15b ( An air inflow opening 25 is provided at the upper end in FIG. 3A and at the rear end in FIGS. 3B and 3C. *

As shown in FIG. 2, the electrostatic atomization unit 4, the high voltage application unit 5, the power supply unit 6, and the air blowing unit 7 of the present embodiment are all held on the same circuit board 8 as a single unit. Composed.

Further, a power input unit (not shown) is held on the circuit board 8, and a power line having a connector for inputting power from outside is connected to the power input unit. The power input unit held on the circuit board 8 is electrically connected to the high voltage application unit 5, the power supply unit 6, the air blowing unit 7, and the like held on the circuit board 8 through a circuit formed on the circuit board 8.

The circuit board 8 holds an electrically insulating cover 30 made of synthetic resin. The cover 30 covers the electrostatic atomizer 4 including the discharge electrode 2 and the heat exchange unit 3.

An air intake port 31 is opened in the first end surface 30a (left end surface in FIG. 1) of the cover 30, and the second end surface 30b (right end surface in FIG. 1) opposite to the first end surface 30a. Is provided with a cylindrical part 24 constituting the discharge part 10.

By holding the cover 30 on the circuit board 8 in this manner, the space 33 surrounded by the cover 30 and the circuit board 8 is substantially sealed except for the air intake port 31 and the discharge unit 10, and the electrostatic atomizing unit 4. Are arranged in the space 33.

As shown in FIG. 1, the first end face 30 a of the cover 30 faces the one end face of the air blowing unit 7 in a contact state, and the air intake port 31 faces the air blowing part 7.

The circuit board 8 on which the electrostatic atomizer 4, the high voltage application unit 5, the power supply unit 6, and the air blowing unit 7 are held is incorporated in the case 13 and housed therein. In a state where the circuit board 8 is housed in the case 13, the cylindrical portion 24 provided on the second end surface 30 b of the cover 30 protrudes from one end surface (the right end surface in FIG. 1) of the case 13.

The case 13 is provided with an air inlet 9 (approximately the center of the upper side in the case 13 of FIG. 1).

In the case 13, the air is blown by the blower 7, and as shown by the one-dot chain line in FIGS. 1 and 2, the space 33 in which the air suction port 9, the blower 7, and the electrostatic atomizer 4 are arranged, is discharged. A blowing path 11 through which air flows is formed in the order of the part 10.

The power supply unit 6 for supplying power to the heat exchanging unit 3 made of a Peltier unit has a booster circuit, and this booster circuit includes a heating circuit component 12 such as a diode that generates heat when a large current is applied.

The heat generating circuit component 12 is disposed at a position away from the air blowing path 11 of the circuit board 8.

When the electrostatic atomizer 1 having the above-described configuration is energized from the power supply unit 6 to the thermoelectric elements 16, heat is transferred in the same direction in each thermoelectric element 16, and the cooling unit side of the thermoelectric elements 16 is cooled. The discharge electrode 2 is cooled, the heat radiation side becomes high temperature, and the heat radiation energizing portion 23 becomes high temperature.

When the discharge electrode 2 is cooled, the air around the discharge electrode 2 is cooled, the moisture in the air is liquefied by condensation or the like, and condensed water is generated at the tip of the discharge electrode 2.

In the state where the discharge electrode 2 is cooled and the condensed water is held at the tip of the discharge electrode 2 as described above, a high voltage is applied by the high voltage application unit 5 to generate a strong electric field around the discharge electrode 2. generate. As a result, the water held at the tip of the discharge electrode 2 is negatively or positively charged, the Coulomb force acts on the charged water, and the water level rises locally in a conical shape to form a Taylor cone. The Then, the charge concentrates at the tip of the conical water, the charge density becomes high, and the water is split and scattered (Rayleigh splitting) so that it is repelled by the repulsive force of the high-density charge. To generate nanometer-sized charged fine particle water having radicals.

On the other hand, heat is released from the heat dissipating current-carrying portion 23.

Here, simultaneously with the energization from the power supply unit 6 to the thermoelectric element 16, the air blowing unit 7 is energized, the air blowing unit 7 is operated, and the air flows along the air blowing path 11 indicated by the one-dot chain line in FIGS. Flowing.

The air flow sent to the space 33 through the air blowing portion 7 in the middle of the air blowing path 11 flows along the outer peripheral wall of the atomizing casing 15, hits the heat radiating current energizing portion 23, and the heat radiating current energizing portion 23 passes through. Cooling promotes heat dissipation and flows toward the second end face 30 b of the cover 30.

On the other hand, the charged fine particle water generated by electrostatic atomization in the atomization casing 15 is an ion wind generated at the time of electrostatic atomization, and a small amount of air flowing into the atomization casing 15 from the air inflow opening 25. Thus, it is carried outside through the first end portion 15a where the atomizing casing 15 opens. The charged fine particle water carried outside the first end portion 15a of the atomizing casing 15 merges with the air flow flowing outside the atomizing casing 15, and rides on this to be discharged from the discharge portion 10 to the outside. . Thereby, it becomes possible to fly the charged fine particle water far.

The amount of air flowing into the atomization casing 15 from the air inflow opening 25 is set so as not to hinder the generation of moisture in the air as dew condensation water at the discharge electrode 2. As a result, the dew condensation time can be shortened and the dew condensation water can be generated stably.

The electrostatic atomizer 1 having the above configuration holds an electrostatic atomizer 4 having a discharge electrode 2 and a heat exchange unit 3, a high voltage application unit 5, a power supply unit 6, a blower unit 7 and the like on a circuit board 8. As a single unit, the configuration is simplified and the size can be reduced.

In addition, since it includes the heat-dissipating energizing part 23 having the function of energizing the heat exchanging part 3 and dissipating heat, it is not necessary to configure the energizing and heat dissipating to the heat exchanging part 3 by separate members, and the configuration is simplified. In this respect, the electrostatic atomizer 1 can be downsized.

In the electrostatic atomizer 1 of the present embodiment, since the heat generating circuit component 12 is disposed at a position away from the air blowing path 11, the heat of the heat generating circuit component 12 directly heats the discharge electrode 2 or blows air. It is possible to suppress the air around the discharge electrode 2 from being heated by the heated air by heating the air flow flowing through the path 11.

As a result, although each component is held on the same circuit board 8 and the apparatus can be made compact, the heat exchange unit 3 is cooled and stabilized based on the moisture in the air around the discharge electrode 2. Condensed water can be generated.

Further, in the electrostatic atomizer 1 of the present embodiment, since the heat radiation energization unit 23 that serves as both energization to the heat exchange unit 3 and heat radiation of the heat exchange unit 3 is mounted on the circuit board 8, heat exchange is performed. A harness for energizing the portion 3 is not required, the configuration is simplified, and the assembly is simplified.

Here, in the electrostatic atomizer 1 of the present embodiment, as shown in FIG. 1, a heat dissipating part (heat dissipating contact part) 14 is provided near the heat generating circuit component 12. The heat dissipation part 14 is provided on the circuit board 8. The heat radiating part 14 is formed of a member having high thermal conductivity and thermally connects the case 13 and the circuit board 8. For example, the heat radiating part 14 is fastened to a screw hole to fix the circuit board 8 to the case 13. It is a fixed fixing screw. In FIG. 1, a heat radiating portion 14 is provided near one end portion (right end portion in FIG. 1) of the heat generating circuit component 12 on the discharge electrode 2 side.

Thus, by providing the heat radiation part 14 near the heat generating circuit component 12, the heat of the heat generating circuit component 12 is effectively radiated at a position away from the discharge electrode 2, and the influence of the heat on the discharge electrode 2 side. Is further suppressed.

FIG. 4 shows an electrostatic atomizer 1 according to another embodiment of the present invention. Also in the electrostatic atomizer 1, the heat radiating portion 14 is provided near the heat generating circuit component 12. In this example, the width of the one side end portion of the heat generating circuit component 12 on the discharge electrode 2 side is substantially equal to or longer than the width of the one side end portion of the heat generating circuit component 12 on the discharge electrode 2 side. A heat radiating portion 14 is provided. Thereby, the heat of the heat generating circuit component 12 can be radiated more effectively by the heat radiating portion 14.

In the two embodiments described above, an example in which one heat radiating portion 14 is provided is shown, but a plurality of heat radiating portions 14 may be provided on the circuit board 8.

FIG. 5 shows an electrostatic atomizer 1 according to still another embodiment of the present invention. In the electrostatic atomizer 1, the heat radiating unit 14 is provided in the middle of the heat conduction path 40 in the circuit board 8 between the heat generating circuit component 12 and the electrostatic atomizing unit 4.

In FIG. 5, the heat conduction path 40 from the heat generating circuit component 12 to the electrostatic atomizing unit 4 is indicated by a broken line, and one or more heat conduction paths 40 from the heat generating circuit component 12 to the electrostatic atomizing unit 4 are provided. A heat radiating portion 14 is provided. That is, when the circuit board 8 is viewed in plan, the plurality of heat radiating portions 14 are arranged along a substantially straight line connecting the heat generating circuit component 12 and the electrostatic atomizing portion 4.

As in this embodiment, by providing the heat radiating portion 14 in the heat conduction path 40 from the heat generating circuit component 12 to the electrostatic atomizing portion 4, the heat of the heat generating circuit component 12 is radiated more effectively, and the discharge electrode 2. The influence of heat on the side is further suppressed.

Further, as shown in FIG. 2, for reducing the influence of electrical noise from the circuit board 8 on which the electrostatic atomizing unit 4, the high voltage applying unit 5, the power supply unit 6, and the air blowing unit 7 are held. The ground part 21 may also serve as the heat radiating part 14.

The ground portion 21 is electrically connected to the circuit board 8 side and the metal case 13 side. The ground portion 21 is formed of a material having high thermal conductivity, and the heat of the heat generating circuit component 12 is effectively collected at the end of the ground portion 21 on the circuit board 8 side, and is effectively passed through the ground portion 21. Heat is transferred to the case 13.

Further, as shown in FIG. 2, the electrostatic atomization unit 4, the air blowing unit 7, and the high voltage application unit 5 are provided on the front surface side (the upper surface side in FIG. 2) of the circuit board 8. The heating circuit component 12 is preferably provided on the lower surface side in FIG.

In this case, the air blowing path 11 is formed on the surface side of the circuit board 8 as shown in FIG. More specifically, as shown in FIG. 2, when the inside of the case 13 is divided into a first region 41 and a second region 42 by the circuit board 8, Preferably, the heat generating circuit component 12 is disposed on the second region 42 side. In this case, the air inlet 9 and the discharge part 10 are formed on the first region 41 side of the case 13.

Therefore, it is possible to effectively suppress the heating circuit component 12 from heating the air flow flowing through the air flow path 11 on the back surface side of the circuit board 8, and the heating circuit component 12 and the electrostatic atomizing unit 4 are connected to the circuit board. 8 is isolated on both sides.

Thereby, in this embodiment, the influence of the heat of the heat generating circuit component 12 on the discharge electrode 2 side is further suppressed.

While the invention has been described in terms of several preferred embodiments, various modifications and variations can be made by those skilled in the art without departing from the true spirit and scope of the invention, ie, the claims.

Claims

An electrostatic atomizer having a heat exchange means for generating condensed water based on the discharge electrode and moisture in the air and supplying the discharge electrode with water;
A high voltage application unit for generating a strong electric field to electrostatically atomize water supplied to the discharge electrode;
A power supply for supplying power to the heat exchange means;
A blower for supplying air to the heat exchange means for cooling;
The electrostatic atomizing unit, the high voltage applying unit, the power supply unit, and a case that houses the air blowing unit,
The electrostatic atomization unit, the high voltage application unit, the power supply unit, and the blower unit are mounted on the same circuit board,
The circuit board is disposed in the case;
The case is provided with an air suction port through which air for supplying air to the electrostatic atomization unit is sucked, and a discharge unit from which charged fine particle water generated by the electrostatic atomization unit is discharged,
The blower unit is disposed between the air suction port and the electrostatic atomization unit on the circuit board, and the air suction port, the blower unit, and the electrostatic atomization unit are blown by the blower unit. , A ventilation path through which air flows in the order of the discharge part,
The power supply unit includes a heating circuit component that generates heat when a large current flows during operation of the electrostatic atomization unit,
The electrostatic atomizer according to claim 1, wherein the heat generating circuit component is disposed on the circuit board at a position deviated from the air blowing path.
The electrostatic atomizer according to claim 1, wherein a heat radiating portion is provided near the heat generating circuit component.
The electrostatic atomizer according to claim 1, wherein one or a plurality of heat dissipating parts are provided in the middle of a heat conduction path between the heat generating circuit component and the electrostatic atomizing part.
The said electrostatic atomization part and the said ventilation part are provided in the surface side of the said circuit board, and the said heat generating circuit component is provided in the back surface side of the said circuit board, Any one of Claim 1 thru | or 3 characterized by the above-mentioned. The electrostatic atomizer as described in any one of Claims.
The one or a plurality of heat radiating portions are provided along a straight line connecting the heat generating circuit component and the electrostatic atomizing portion when the circuit board is viewed in plan. Electrostatic atomizer.
The inside of the case is divided into a first region and a second region by the circuit board,
The electrostatic atomizer according to claim 1, wherein the air blowing path is formed on the first region side, and the heat generating circuit component is disposed on the second region side.