WO2013042481A1 - Electrostatic atomizing device - Google Patents

Abstract

In an electrostatic atomizing device provided with a discharge electrode (1), condensation water generating unit (2), high voltage application unit (3), and a condensation water generating control circuit (4) that controls the condensation water generating unit (2), electric components (6, 7), the outer areas of which are metal, are disposed between the high voltage application unit (3) and condensation water generating control circuit (4). According to this constitution, the condensation water generating control circuit is not affected by the noise generated by the high voltage application unit even if the electrostatic atomizing device is made smaller.

Description

Electrostatic atomizer

The present invention relates to an electrostatic atomizer.

Japanese Patent Publication No. 2007-117971 discloses a discharge electrode, a dew condensation water generation unit that generates dew condensation water and supplies water to the discharge electrode, and a high voltage that electrostatically atomizes the water supplied to the discharge electrode. An electrostatic atomizer including a high voltage application unit for applying and a condensed water generation control circuit (hereinafter simply referred to as a control circuit) for performing cooling control of the condensed water generation unit is disclosed.

The dew condensation water generation unit of the above document generates dew condensation water by cooling the moisture of the air and supplies it to the discharge electrode.

In this document, the high voltage application unit and the control circuit are arranged adjacent to each other.

The control circuit is composed of a minute signal circuit. Therefore, in the case where the high voltage application unit and the control circuit are arranged adjacent to each other as in the above document, the control circuit may be affected by noise generated by the high voltage application unit.

Therefore, conventionally, it is necessary to protect the control circuit by taking a distance as much as possible between the high voltage application unit and the control circuit so as not to be affected by noise from the high voltage application unit.

If the high voltage application unit and the control circuit are brought close to each other for the purpose of miniaturization, the high voltage application unit may affect the control circuit processing a minute signal. When the control circuit is thus affected, normal control of the condensed water generation unit is not performed, and generation of condensed water is not stably performed. For this reason, there exists a possibility that electrostatic atomization may not be performed stably.

Therefore, conventionally, it is necessary to take as much distance as possible between the high voltage application unit and the control circuit so as not to be affected by noise from the high voltage application unit as described above. This is a factor that hinders downsizing.

Therefore, an object of the present invention is to provide an electrostatic atomizer that can suppress the influence of the high voltage application unit on the condensed water generation control circuit and can be miniaturized.

The electrostatic atomizer of the present invention is supplied to the discharge electrode, a condensed water generation unit that generates water as condensed water by cooling moisture in the air and supplies water to the discharge electrode, and the discharge electrode A high voltage application unit for applying a high voltage for electrostatic atomization of water, and a dew condensation water generation control circuit for performing cooling control of the dew condensation water generation unit, the high voltage application unit and the dew condensation water An electrical component whose outer shell is made of metal is disposed between the generation control circuit and the generation control circuit.

In this configuration, since an electrical component having a metal outline is disposed between the high voltage application unit and the condensed water generation control circuit, the influence of the high voltage application unit on the condensed water generation control circuit is suppressed, and a small size is achieved. Can be realized.

Further, it is preferable that the electrical component is an electrolytic capacitor for stabilizing the power line of the electrostatic atomizer.

The circuit board on which the high voltage application unit, the condensed water generation control circuit, and the electrical component are mounted is provided, and the electrical component includes the high voltage application unit and the condensed water in a plan view of the circuit board. It is preferable to be mounted at a position between the generation control circuits.

The electrical component includes a plurality of electrical components, and the plurality of electrical components are arranged in a direction in which the high voltage application unit and the condensed water generation control circuit are arranged in parallel in a plan view of the circuit board. Are preferably arranged in the vertical direction.

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 schematic block diagram of the electrostatic atomizer which concerns on embodiment of this invention. It is a schematic block diagram of the electrostatic atomization generating part used for the electrostatic atomizer which concerns on embodiment of this invention.

Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

The electrostatic atomizer 5 electrostatically discharges the discharge electrode 1, a dew condensation water generation unit 2 that generates moisture in the air as dew condensation water and supplies the discharge electrode 1 with water, and the water supplied to the discharge electrode 1. A high voltage application unit 3 that applies a high voltage to be atomized and a condensed water generation control circuit 4 that performs cooling control of the condensed water generation unit 2 (hereinafter simply referred to as a control circuit 4) are provided.

The high voltage application unit 3 and the control circuit 4 are held on a common substrate (circuit board) 8, and an electrical component 6 whose outer shell is made of metal is disposed between the high voltage application unit 3 and the control circuit 4. In particular, in the present embodiment, as shown in FIG. 1, the electrical component 6 is mounted at a position between the high voltage application unit 3 and the control circuit 4 in a plan view of the substrate 8.

In FIG. 1, a high-voltage transformer 10 having a high voltage application unit 3, a weak signal circuit unit 9 having a control circuit 4, and an electrical component 6 having an outer shell made of metal are mounted on a circuit board constituting the substrate 8. An example is shown. The substrate 8 includes a power input unit (not shown) for inputting power from outside, and supplies power to the power line of the electrostatic atomizer 5 from the power input unit.

In addition to the control circuit 4, the weak signal circuit unit 9 further includes other weak signal circuits 11 such as a high voltage output detection circuit and a discharge current detection circuit.

Further, in the embodiment of FIG. 1, the substrate 8 further includes other electrical components such as an inductor 12 and connectors 13 and 14.

As the electric component 6 whose metal is disposed between the high voltage applying unit 3 and the control circuit 4, for example, an electrolytic capacitor 7 for stabilizing the power line of the electrostatic atomizer 5 is used.

The discharge electrode 1 and the dew condensation water generation unit 2 are incorporated in an atomization casing 16, and a single electrostatic atomization generation unit 17 is configured.

The atomizing casing 16 is made of a synthetic resin, and in the embodiment shown in FIGS. 1 and 2, an example provided with the counter electrode 18 is shown.

The counter electrode 18 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 1.

The condensed water generation unit 2 is configured by heat exchange means, and includes a plurality of thermoelectric elements 19 in the embodiment of FIG.

In FIG. 2, one or more sets of P-type Peltier elements and N-type Peltier elements are used as the thermoelectric elements 19. 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 20 made of a flat plate-shaped conductive material, and the end portion of the Peltier element on the connecting portion 20 side (FIG. 2). The right end of the Peltier element is the cooling side, and the other end of the Peltier element (the left end in FIG. 2) is the heat dissipation side.

The discharge electrode 1 having a sharp tip protrudes on the surface side of the connecting portion 20, and the discharge side 1 is cooled by cooling the cooling side of the heat exchanging means constituting the condensed water generating portion 2.

A heat-dissipating current-carrying part 21 that conducts electricity and dissipates heat is joined to the end of the thermoelectric element 19 that forms a pair of P-type and N-type, respectively. It protrudes outside the conversion casing 16.

The heat dissipation energization section 21 has a heat dissipation function and a function of energizing the thermoelectric element 19.

This heat dissipation energization section 21 is connected to the connector 13 via the energization harness 22.

The discharge electrode 1 or the counter electrode 18 is connected to a connector 14 that outputs a high voltage from the high voltage application unit 3 via a high-voltage energization harness 23.

In this embodiment, the electrical component 6 whose outer shell is made of metal is an electrolytic capacitor 7 for stabilizing the power supply line of the electrostatic atomizer 5.

When the electrostatic atomizer 5 having the above-described configuration is energized to the thermoelectric elements 19, heat is transferred in the same direction in each thermoelectric element 19, the cooling portion side of the thermoelectric elements 19 is cooled, and the discharge electrode 1 is cooled. As a result, the heat radiation side becomes high temperature, and the heat radiation energizing portion 21 becomes high temperature.

When the discharge electrode 1 is cooled, the air around the discharge electrode 1 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 1.

In the state where the discharge electrode 1 is cooled and the condensed water is held at the tip of the discharge electrode 1 as described above, a high voltage is applied by the high voltage application unit 3 to generate a strong electric field around the discharge electrode 1. generate. As a result, the water held at the tip of the discharge electrode 1 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 radiated from the heat radiating energizing section 21.

Here, the control circuit 4 controls the cooling of the dew condensation water generating unit 2 by controlling the energization amount to the thermoelectric element 19. Thereby, the production amount of the dew condensation water to the discharge electrode 1 is made substantially constant, the Taylor cone is stably formed, and the electrostatic atomization can be stably performed.

Since there is a correlation between the size of the Taylor cone and the discharge current and discharge voltage, the state of the Taylor cone can be estimated by detecting the discharge current and discharge voltage with the discharge current detection circuit and the high voltage output detection circuit. When the Taylor cone is small, it can be estimated that the amount of condensed water produced is small, and when the Taylor cone is large, it can be estimated that the amount of condensed water produced is large. Based on this, the control circuit 4 controls the amount of power supplied to the heat transfer element 19 to perform cooling control, so that the amount of condensed water generated is controlled to be a predetermined amount generated, and stable electrostatic atomization. Is possible.

In the present embodiment, an example is shown in which the control circuit 4 controls the amount of current supplied to the heat transfer element 19 based on detection of the discharge current and discharge voltage to perform cooling control. (Not shown), and cooling control may be performed based on the detection value of the environment detection sensor.

That is, ambient temperature data such as temperature and humidity is detected by a temperature sensor and humidity sensor that are ambient environment detection sensors, and based on this, the control circuit 4 controls the amount of current supplied to the heat transfer element 19 to cool it. Control may be performed. Also in this case, the control circuit 4 controls the energization amount to the heat transfer element 19 according to the data of the surrounding environment and performs the cooling control so that the amount of condensed water generated is controlled to be a predetermined amount. Stable electrostatic atomization is possible.

In the present embodiment, since the electric component 6 having a metal outline is disposed between the high voltage application unit 3 and the control circuit 4, noise generated by the high voltage application unit 3 affects the control circuit 4. Can be suppressed. Therefore, the high voltage application unit 3 and the control circuit 4 can be arranged close to each other and contribute to downsizing of the electrostatic atomizer 5.

In the present embodiment, the electrical component 6 whose outer shell is made of metal includes a plurality of electrical components 6 (two in FIG. 1), and these multiple electrical components 6 have a high voltage in plan view of the substrate 8. The application unit 3 and the control circuit 4 are arranged in a direction (up and down direction in FIG. 1) perpendicular to a direction (left and right direction in FIG. 1). By arranging in this way, noise can be more effectively suppressed.

Further, in the embodiment, the heat-dissipating current-carrying part 21 that conducts current and heat is joined to the end of the thermoelectric element 19 on the heat-dissipation side, and the member for current-carrying and the member for heat-dissipation are combined. The condensed water production | generation part 2 can be reduced in size and it can contribute to size reduction of the electrostatic atomizer 5 also in this point.

In addition, the discharge electrode 1 and the dew condensation water generating unit 2 are incorporated into the atomizing casing 16 on the substrate 8 on which the high voltage applying unit 3, the control circuit 4, and the electrical component 6 whose outer shell is made of metal are mounted, thereby forming one block. The electrostatic atomization generation unit 17 may be mounted. If it does in this way, the further miniaturization of the electrostatic atomizer 5 will be attained.

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 (4)

A discharge electrode, a dew condensation water generator that generates water as condensed water by cooling moisture in the air and supplies water to the discharge electrode, and a high voltage that electrostatically atomizes the water supplied to the discharge electrode An electrostatic atomizer comprising a high voltage application unit for applying and a dew condensation water generation control circuit for performing cooling control of the dew condensation water generation unit, the high voltage application unit and the dew condensation water generation An electrostatic atomizer characterized in that an electrical component whose outer shell is made of metal is disposed between the control circuit and the control circuit. 2. The electrostatic atomizer according to claim 1, wherein the electrical component is an electrolytic capacitor for stabilizing a power line of the electrostatic atomizer. A circuit board on which the high voltage application unit, the condensed water generation control circuit, and the electrical component are mounted is provided, and the electrical component includes the high voltage application unit and the condensed water generation control in a plan view of the circuit board. 3. The electrostatic atomizer according to claim 1, wherein the electrostatic atomizer is mounted at a position between the circuits. The electrical component includes a plurality of electrical components, and the plurality of electrical components are perpendicular to a direction in which the high voltage application unit and the condensed water generation control circuit are arranged in parallel in a plan view of the circuit board. The electrostatic atomizer according to claim 3, wherein the electrostatic atomizer is arranged in a direction.

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