JP5662705B2 - Electrostatic atomizer - Google Patents

Description

  The present invention relates to an electrostatic atomizer that generates charged fine particle water.

  There has been known an electrostatic atomizer capable of generating charged fine particle water based on an atomized liquid by applying a voltage to the atomized liquid. The charged fine particle water produced here contains various active ingredients and has a very small particle size of nanometer size, so it is easy to reach every corner while floating in the space, There is an advantage that it is easy to reach the deep part of the surface of the object (see Patent Document 1).

  On the other hand, the fact that the particle size of the charged fine particle water is very small also tends to evaporate and shorten the lifetime. Therefore, it is desirable that the particle diameter of the charged fine particle water can be controlled in accordance with various conditions such as the purpose of discharging the charged fine particle water and the size of the external target space from which the charged fine particle water is to be discharged.

JP 2009-090282 A

  However, when generating charged fine particles by applying a voltage to the atomizing liquid, it is not easy to freely control the particle size of the charged fine particles at the time of generation.

  This invention is invented in view of the said problem, Comprising: Problem to provide the electrostatic atomizer which can discharge | release charged fine particle water to an external object space in the state which controlled the particle size freely. And

  In order to solve the above-mentioned problems, the electrostatic atomizer of the present invention has the following configuration.

The electrostatic atomizer of the present invention includes an electrostatic atomizer main body that generates charged fine particle water by applying a voltage to the atomizing liquid, a housing having a passage space through which the charged fine particle water passes, Saturation control means for increasing the degree of saturation of the liquid in the passage space by supplying a vapor obtained by evaporating the liquid for particle size growth in the passage space, and by the saturation control means, By controlling the inside of the passage space to be in a supersaturated state of the liquid, condensing the vapor into the liquid with the charged fine particle water passing through the passage space in the supersaturated state as a nucleus, It is characterized by growing the particle diameter of charged fine particle water.

The saturation control means, by controlling the temperature of the supplied and the passage space in front Ki蒸 air into the passage space, it is preferable that increase the saturation of the liquid in the passage space .

  The passage space preferably has a series of an upstream space and a downstream space, and is temperature-controlled so that the downstream space has a higher temperature than the upstream space.

  In addition, it is preferable that the passing space has an upstream space and a downstream space in series and is temperature-controlled so that the downstream space is cooler than the upstream space.

  It is also preferable that the case is one in which a voltage having the same polarity as that of the charged fine particle water is applied.

  Moreover, in the electrostatic atomizer of the present invention, the electrostatic atomizer includes an input unit that inputs an assumed size of the external target space from which the charged fine particle water is discharged, and a particle size corresponding to the assumed size input to the input unit. It is also preferable to grow the particle diameter of the charged fine particle water so that

  The saturation control unit preferably includes a liquefaction unit that liquefies moisture in the atmosphere, and a transport unit that transports water liquefied by the liquefaction unit to the housing.

  It is also preferable that the liquefying means comprises a Peltier module that generates condensed water.

  The present invention has an effect that the charged fine particle water can be discharged to the external target space while the particle size is freely controlled.

It is the schematic which shows the basic composition of the electrostatic atomizer of the 1st example in embodiment of this invention. It is a graph which shows the result of the particle size measurement of the charged fine particle water discharge | released from the electrostatic atomizer same as the above. It is a graph which shows the result of the lifetime measurement of charged fine particle water same as the above. It is the schematic which shows the measurement system used for a lifetime measurement same as the above. It is the schematic which shows the basic composition of the electrostatic atomizer of the 2nd example in embodiment of this invention. It is the schematic which shows the basic composition of the electrostatic atomizer of the 3rd example in embodiment of this invention. It is the schematic which shows the basic composition of the electrostatic atomizer of the 4th example in embodiment of this invention. It is the schematic which shows the basic composition of the electrostatic atomizer of the 5th example in embodiment of this invention.

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

  In FIG. 1, the basic composition of the electrostatic atomizer of the 1st example in embodiment of this invention is shown roughly. The electrostatic atomizer of this example passes the generated charged fine particle water M through the electrostatic atomizer main body 2 that generates charged fine particle water M by applying a voltage to the water that becomes the atomizing liquid 1. A casing 3 having a passage space S, and saturation control means for increasing the saturation degree of the liquid 4 in the passage space S by supplying water vapor as the particle size growth liquid 4 into the passage space S. It comprises.

  The electrostatic atomizer main body 2 includes an atomizing electrode 10 for holding the atomizing liquid 1, a voltage applying unit 11 for applying a predetermined voltage to the atomizing electrode 10, and a fog for the atomizing electrode 10. Liquid supply means for supplying the chemical liquid 1. The liquid supply means here includes a Peltier module 12 that cools the atomizing electrode 10. That is, the atomization electrode 10 is connected to the heat absorption side of the Peltier module 12 which is a heat exchanger having a heat absorption side and a heat radiation side via the cooling plate 13, and the condensed water that becomes the atomization liquid 1 is atomized by the atomization electrode 10. This structure is generated directly.

  A fin-shaped heat radiation portion 28 is connected to the heat radiation side of the Peltier module 12. A large number of Peltier elements (not shown) arranged in the Peltier module 12 are electrically connected to the cooling control unit 14. The cooling control unit 14 controls the cooling of the atomizing electrode 10 by the Peltier module 12, and thereby controls the supply of the atomizing liquid 1 to the atomizing electrode 10.

  The case 15 accommodates the atomizing electrode 10 and the Peltier module 12. The case 15 has an electrostatic atomization space 16 surrounding the atomization electrode 10, and an opening 17 is provided at a position facing the tip of the atomization electrode 10 in the electrostatic atomization space 16. A ring-shaped electrode 18 is disposed in the opening 17.

  The voltage application unit 11 applies a negative high voltage to the atomizing electrode 10 between the electrode 18. In the atomization electrode 10 to which a voltage is applied, an electrostatic atomization phenomenon is generated at the tip of the atomization electrode 10 by applying a high voltage to the atomization liquid 1 held by the atomization electrode 10. Negatively charged charged fine particle water M is generated. The generated charged fine particle water M is discharged out of the case 15 (upward in the figure) through the center hole of the ring-shaped electrode 18.

  In this example, the electrode 18 is disposed at a position facing the atomizing electrode 10, and a predetermined voltage is applied to the atomizing electrode 10 between the electrodes 18, but the electrode 18 is not disposed. Even if it exists, if the high voltage is applied to the atomization electrode 10, the charged fine particle water M can be produced | generated based on the atomization liquid 1. FIG.

  The cooling control unit 14 and the voltage application unit 11 are controlled by a control circuit 19. Reference numeral 20 in the figure denotes an ammeter, which measures a current value between the electrode 18 and the atomizing electrode 10 and inputs it to the control circuit 19. The control circuit 19 detects the discharge state based on the input current value.

  The housing 3 is a cylindrical structure having openings at both axial ends. The housing 3 is connected to the electrostatic atomizer main body 2 (here, the end surface of the housing 3) so that the opening on one end side thereof communicates with the opening 17 of the electrostatic atomizing space 16. The internal space of the housing 3 becomes the passing space S, and the opening on the other end side of the housing 3 becomes the discharge port 21 for discharging the charged fine particle water M that has passed through the passing space S to the external target space.

  The housing 3 has a cylindrical inner portion 22 facing the passage space S and a similarly cylindrical outer portion 23 surrounding the inner portion 22. The inner portion 22 is made of a porous body that can sufficiently hold the moisture that becomes the liquid 4, and the outer portion 23 is made of a non-porous body.

  The saturation control means sequentially conveys the water to be the liquid 4 to the inner part 22 of the housing 3, and liquefies means 24 for liquefying moisture in the air and water liquefied by the liquefaction means 24. And a transport unit 25 for transporting the housing 3. The liquefying means 24 includes a Peltier module 26 for generating condensed water. The transport unit 25 is a porous member that sequentially transports the condensed water generated on the heat absorption side of the Peltier module 26 that is a heat exchanger having a heat absorption side and a heat dissipation side to the inner part of the housing 3 by capillary action. Consists of. Thereby, the liquid 4 can be continuously supplied without the trouble of water replenishment.

  A fin-shaped heat radiation portion 27 is connected to the heat radiation side of the Peltier module 26. A number of Peltier elements (not shown) arranged in the Peltier module 26 are electrically connected to the cooling control unit 14 in the same manner as the Peltier module 26 for generating the atomizing liquid 1. The cooling control unit 14 controls the generation of the liquid 4 by the Peltier module 26, and thereby controls the supply of the liquid 4 to the housing 3, and consequently the degree of saturation of the liquid 4 in the passage space S.

  As described above, the control circuit 19 included in the electrostatic atomizer of this example controls the supply of the atomizing liquid 1 and the liquid 4 via the cooling control unit 14 and the atomizing electrode 10 via the voltage applying unit 11. The voltage application to is controlled.

  When the liquid 4 transported through the transport unit 25 is held by the inner part 22 of the housing 3, the passage space S in the housing 3 is in a state in which the water that is the liquid 4 is highly saturated (that is, the humidity is high). State). Therefore, the charged fine particle water introduced into the passage space S through the opening 17 passes through the passage space S where the degree of saturation of the liquid 4 is high, and then is discharged into the external target space through the discharge port 21.

  In the passage space S, the charged fine particle water M is successively condensed with water as the liquid 4 with this as a nucleus. Thereby, the charged fine particle water M is discharged into the external target space after the particle diameter is increased more than immediately after it is generated in the electrostatic atomizer main body 2.

  As described above, in the electrostatic atomizer of this example, the inside of the passage space S by supplying the vapor of the liquid 4 into the housing 3 having the passage space S through which the charged fine particle water M passes and the passage space S is supplied. And a saturation control means for increasing the saturation of the liquid 4. And it is provided so that the particle size of the liquid 4 may grow by condensing the liquid 4 with the charged fine particle water M passing through the passage space S as a nucleus.

  According to the electrostatic atomizer of this example, the charged fine particle water M having a minute particle size of nanometer size is first generated in the electrostatic atomizer main body 2, and the charged fine particle water is passed through the housing 3. After increasing the particle size of M to a preferable level, it can be discharged into the external target space. That is, after the charged fine particle water M is generated, the particle diameter can be freely grown and then discharged.

  Moreover, in the electrostatic atomizer of this example, the housing 3 is divided into the upstream block 30 and the downstream block 31, the upstream block 30 is cooled, and the downstream block 31 is heated. The cooling means for cooling the upstream block 30 includes a heat transfer member 32 that connects between the heat absorption side of the Peltier module 26 and the upstream block 30. The heating means for heating the downstream block 31 includes a heater 33 provided in close contact with or close to the downstream block 31. The heater 33 is connected to the control circuit 19 via the heating control unit 34.

  The passage space S in the housing 3 is divided into an upstream space S1 that is a space in the upstream block 30 and a downstream space S2 that is a space in the downstream block 31. The upstream space S1 and the downstream space S2 communicate with each other in a straight line, and the temperature is controlled so that the downstream space S2 has a higher temperature than the upstream space S1.

  In this way, the passing space S has a series of the upstream space S1 and the downstream space S2, and the temperature is controlled so that the downstream space S2 has a higher temperature than the upstream space S1, The particle diameter of the charged fine particle water M passing through the passage space S is efficiently increased.

  That is, the charged fine particle water M is first introduced into the upstream space S1 which is the low temperature side, and then introduced into the downstream space S2 which is the high temperature side, and passes through the downstream space S2 before being externally targeted. It is discharged into the space. Here, in the downstream space S2 which is the high temperature side, water vapor (that is, water vapor) which is the liquid 4 exists at a high temperature. In the downstream space S2, most of the aerosol composed of low-temperature charged fine particle water M and water vapor introduced from the upstream space S1, which is the low temperature side, is in the axial center side area A (the hatched line in the figure). Part).

  The high temperature water vapor present in the downstream space S2 has a tendency to diffuse toward the low temperature side. Accordingly, the high temperature water vapor existing in the downstream space S2 moves so as to concentrate on the axial center side area A side where the aerosol passes and becomes relatively low temperature. For this reason, in the downstream space S2 which is the high temperature side, the axial center side area A side is easily oversaturated, and moisture is efficiently condensed in the charged fine particle water M passing through the axial center side area A. The particle diameter of the charged fine particle water M is increased. That is, the charged fine particle water M that passes through the passage space S grows more efficiently.

  Note that means for generating a temperature difference between the upstream space S1 and the downstream space S2 is not limited to the cooling means and the heating means. That is, the upstream space S1 may be cooled by other means and the downstream space S2 may be heated, or only the upstream space S1 may be cooled, or only the downstream space S2 may be heated. There may be.

  2 and 3 show the experimental results. Here, as the growth conditions, the upstream block 30 of the housing 3 is maintained at 15 ° C. and the downstream block 31 is maintained at 60 ° C., and the charged fine particle water M generated in the electrostatic atomizer main body 2 is supplied to the fan. Was passed through the housing 3 at a flow rate of 1.5 L / m.

  From the experimental results shown in FIG. 2, the charged fine particle water discharged to the outside when the casing 3 is passed (when growth is present) as compared to when the casing 3 is not allowed to pass (when growth is not present). It can be seen that the particle size of M grows about 5 times (about 125 times in volume).

  From the experimental results shown in FIG. 3, when the casing 3 is passed (when the particle size is grown about 5 times) compared to when the casing 3 is not allowed to pass (when there is no growth), It can be seen that the life of the charged fine particle water M discharged to the outside is improved by about 7 times. The lifetime measurement here was performed by the measurement system shown in FIG. In this measurement system, the charged fine particle water M discharged from the electrostatic atomizer is passed through the copper tube 35 and then measured by the ion concentration measuring device 36. The length dimension of the copper pipe 35 is freely selectable within a range of 0.01 to 50 m.

  In this example, the temperature is controlled so that a temperature difference is generated between the upstream space S1 and the downstream space S2. However, even if the temperature difference is not generated in the passage space S, the vapor of the liquid 4 Can pass through the passage space S existing at a high degree of saturation, the particle diameter of the charged fine particle water M can be grown. At this time, the temperature may be controlled so as to cool the entire inside of the passage space S together with the supply of the steam to the passage space S or instead of the supply of the steam. Even if the amount of steam present in the passage space S is the same, the saturation can be increased by lowering the temperature of the atmosphere.

  Next, the electrostatic atomizer of the 2nd example in embodiment of this invention is demonstrated based on FIG. In the following, detailed description of the configuration of this example that is the same as that of the first example will be omitted, and only the characteristic configuration of this example will be described in detail.

  In the electrostatic atomizer of this example, the Peltier module 12 for cooling the atomizing electrode 10 is also used as the liquefying means 24 for generating condensed water for transporting to the housing 3.

  The atomizing electrode 10 is connected to the first portion on the heat absorption side of the Peltier module 12 via the cooling plate 13. Thereby, the atomization electrode 10 is cooled by said 1st part, and the dew condensation water used as the atomization liquid 1 is produced | generated directly on the atomization electrode 10. FIG.

  Further, a cooling plate 40 for generating condensed water is connected to the second portion on the heat absorption side of the Peltier module 12. Thereby, the cooling plate 40 is cooled by the second portion, and condensed water that becomes the liquid 4 is generated on the cooling plate 40. A conveying unit 41 made of a porous member is connected to the cooling plate 40. This conveyance part 41 conveys the dew condensation water produced | generated on the cooling plate 40 to the inner part 22 of the housing | casing 3 sequentially by a capillary phenomenon.

  The cooling control unit 14 electrically connected to the Peltier module 12 controls the cooling of the atomizing electrode 10 to control the supply of the atomizing liquid 1 and also controls the cooling of the cooling plate 40 to supply the liquid 4. Control.

  Further, a heat transfer member 42 is connected to the Peltier module 12 along the outer peripheral surface of the housing 3. The heat transfer member 42 connects the heat absorption side of the Peltier module 26 and the upstream block 30 and cools the upstream block 30.

  According to the electrostatic atomizer of this example, the structure can be made compact and the cost can be reduced.

  Next, the electrostatic atomizer of the 3rd example in the embodiment of the present invention is explained based on FIG. In the following, detailed description of the configuration of this example that is the same as that of the second example will be omitted, and only the characteristic configuration of this example will be described in detail.

  In the electrostatic atomizer of the present example, a heater 50 that is in close contact with or close to the upstream block 30 of the housing 3 is provided, and the upstream block 30 is heated to thereby provide a downstream space S2 rather than the upstream space S1. The temperature is controlled so that the temperature becomes low. The heater 50 is connected to the control circuit 19 via the heating control unit 51. Even in this case, as described below, the particle diameter of the charged fine particle water M passing through the passage space S is efficiently increased.

  The charged fine particle water M is first introduced into the upstream space S1 which is the high temperature side, then introduced into the downstream space S2 which is the low temperature side, and passes through the downstream space S2 before entering the external target space. Discharged. The periphery of the charged fine particle water M introduced from the high temperature side to the low temperature side becomes supersaturated when the temperature is lowered during passage, and the vapor of the liquid 4 in the supersaturated state condenses using the charged fine particle water M as a nucleus. . That is, the water is efficiently condensed in the charged fine particle water M passing through the downstream space S2, and the charged fine particle water M grows efficiently by increasing the particle diameter of the charged fine particle water M. Yes.

  Thus, the passage space S of the electrostatic atomizer of this example has a series of the upstream space S1 and the downstream space S2, and the temperature is such that the downstream space S2 has a lower temperature than the upstream space S1. Controlled. Therefore, the particle diameter of the charged fine particle water M passing through the passage space S is efficiently increased.

  Although the growth process of this example is different from the growth process of the first example, in any process, the charged fine particle water M grows more efficiently than the case where no temperature difference is provided. Note that means for generating a temperature difference between the upstream space S1 and the downstream space S2 is not limited to the heating means. That is, for example, the temperature difference may be generated by cooling the downstream space S2, or the heating of the upstream space S1 and the cooling of the downstream space S2 may be combined. The heating and cooling methods can also be selected as appropriate.

  Next, the electrostatic atomizer of the 4th example in the embodiment of the present invention is explained based on FIG. In the following, detailed description of the configuration of this example that is the same as that of the first example will be omitted, and only the characteristic configuration of this example will be described in detail.

  In the electrostatic atomizer of this example, the voltage application unit 11 is provided to apply a negative voltage to the casing 3 through which the charged fine particle water M passes. Thereby, when the negatively charged charged fine particle water M passes through the inside of the housing 3, a repulsive force is exerted between the charged fine particle water M and the housing 3 so that the charged fine particle water M is adsorbed on the inner surface of the housing 3. Suppress.

  Note that any means for applying a voltage to the housing 3 may be used as long as a voltage having the same polarity as that of the charged fine particle water M is applied to at least the inner surface of the housing 3.

  Next, the electrostatic atomizer of the 5th example in the embodiment of the present invention is explained based on FIG. In the following, detailed description of the configuration of this example that is the same as that of the first example will be omitted, and only the characteristic configuration of this example will be described in detail.

  In the electrostatic atomizer of this example, the input unit 70 capable of inputting the assumed size of the external target space from which the charged fine particle water M is discharged is provided at a location operable by the user. As the assumed size here, for example, a size based on the floor area of the room is used. In this case, switches that can select floor areas such as 8 tatami mats, 16 tatami mats, and 24 tatami mats are provided in the input unit 70.

  The control circuit 19 sets the particle size of the charged fine particle water M released to the external target space to a particle size corresponding to the assumed size (8 tatami mats, 16 tatami mats, 24 tatami mats) input to the input unit 70. The voltage application unit 11 and the cooling control unit 14 are controlled. By controlling the voltage application unit 11 and the cooling control unit 14, the temperature of the passing space S in the housing 3, the temperature difference between the upstream space S 1 and the downstream space S 2, the transport amount of the liquid 4 into the housing 3, At least one of the appropriate parameters such as the above is controlled, and finally, to what particle size the charged fine particle water M grows is controlled.

  In general, the larger the particle size, the longer the life, while it is difficult to reach every corner of the external target space. On the other hand, the degree of growth of the charged fine particle water M is set differently when the assumed size to be inputted is small and when it is large. Specifically, in the former case, each parameter is set so that the charged fine particle water M is released with a larger particle diameter than in the latter case.

  Thus, in this example, the input unit 70 for inputting the assumed size of the external target space from which the charged fine particle water M is discharged is provided, and the particle size corresponding to the assumed size input to the input unit 70 is charged. The fine particle water M is provided to grow. Thereby, the charged fine particle water M can be discharged with particle sizes corresponding to various external target spaces.

  As mentioned above, although this invention was demonstrated based on embodiment shown to an accompanying drawing, this invention is not limited to embodiment of each said example, If it is in the range which this invention intends, in each example suitably It is possible to change the design of the above and to apply a combination of the configurations of the examples as appropriate.

DESCRIPTION OF SYMBOLS 1 Atomization liquid 2 Electrostatic atomizer main body 3 Case 4 Liquid 10 Atomization electrode 12 Peltier module 24 Liquefaction means 25 Conveyance part 26 Peltier module 30 Upstream side block 31 Downstream side block 41 Conveyance part 70 Input part M Charged particulate water S Passing space S1 Upstream space S2 Downstream space

Claims (8)

An electrostatic atomizer main body that generates charged fine particle water by applying a voltage to the atomized liquid, a housing having a passage space through which the charged fine particle water passes, and a liquid for particle size growth in the passage space A saturation control means for increasing the saturation of the liquid in the passage space by supplying vapor obtained by evaporating the liquid, and the liquid space is supersaturated in the passage space by the saturation control means. The particle size of the charged fine particle water is grown by condensing the vapor into a liquid using the charged fine particle water passing through the passage space in the supersaturated state as a nucleus. Electrostatic atomizing device characterized.   The saturation control means increases the saturation of the liquid in the passage space by supplying the vapor into the passage space and controlling the temperature in the passage space. The electrostatic atomizer of Claim 1.   The said passing space has an upstream space and a downstream space in series, and is temperature-controlled so that the downstream space has a higher temperature than the upstream space. 2. The electrostatic atomizer according to 2.   The said passing space has an upstream space and a downstream space in series, and is temperature-controlled so that the downstream space has a lower temperature than the upstream space. 2. The electrostatic atomizer according to 2.   The electrostatic atomizer according to any one of claims 1 to 4, wherein the casing is applied with a voltage having the same polarity as that of the charged fine particle water.   An input unit for inputting an assumed size of an external target space from which the charged fine particle water is discharged; and growing the charged fine particle water so as to have a particle size corresponding to the assumed size input to the input unit. The electrostatic atomizer as described in any one of Claims 1-5 characterized by the above-mentioned.   The said saturation control means has a liquefaction means to liquefy the water | moisture content in air | atmosphere, and the conveyance part which conveys the water liquefied by the said liquefaction means to the said housing | casing, The any one of Claims 1-6 characterized by the above-mentioned. The electrostatic atomizer as described in any one of Claims.   The electrostatic atomizer according to claim 7, wherein the liquefying unit includes a Peltier module that generates condensed water.

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