JP2010227926A - Electrostatic atomization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic atomization apparatus capable of holding sufficient cooling ability for generating dew condensation water on a discharge electrode and then achieving downsizing of the entire apparatus and energy saving. <P>SOLUTION: In the electrostatic atomization apparatus for generating charged particulate water by applying a voltage to the dew condensation water generated by cooling the discharge electrode 1, the heat absorption sides of a pair of thermoelectric element parts 2 provided in order to cool the discharge electrode 1 are electrically connected to each other via the discharge electrode 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electrostatic atomizer that generates charged fine particle water, and more particularly to a technique for realizing downsizing and energy saving of the entire apparatus.

  As an electrostatic atomizer capable of generating charged fine particle water, one that generates charged fine particle water by applying a voltage to condensed water generated by cooling a discharge electrode is known (see Patent Document 1). ). This electrostatic atomizer is as shown in FIG. 17, and a heat exchange block 60 is configured by sandwiching a large number of thermoelectric elements 23 from both sides with a circuit board 50. The circuit board 50 has a circuit pattern 52 formed on one side of an insulating substrate 51. The circuit pattern 52 of one circuit board 50 electrically connects the ends on the heat radiation side of the thermoelectric element 23 to each other. The end portions on the heat absorption side of the thermoelectric element 23 are electrically connected by the circuit pattern 52 of the plate 50.

  A heat conductive cooling plate 70 is connected to the circuit board 50 on the heat absorption side of the heat exchange block 60, and the discharge electrode 1 is connected to the cooling plate 70. Further, a heat radiation member 71 is connected to the circuit board 50 on the heat radiation side of the heat exchange block 60.

  In the electrostatic atomizer having the above configuration, the heat absorption side of the thermoelectric element 23 cools the discharge electrode 1 through the circuit pattern 52, the insulating substrate 51, and the cooling plate 70. Condensed water is generated on the surface of the discharge electrode 1 by cooling. A high-voltage lead wire 80 is connected to the discharge electrode 1, and a high voltage is applied to the condensed water on the surface of the discharge electrode 1 through the high-voltage lead wire 80, thereby generating charged fine particle water by an electrostatic atomization phenomenon. Let

  However, there are many interfaces between the thermoelectric element 23 and the discharge electrode 1 (the interface between the thermoelectric element 23 and the circuit pattern 52, the interface between the circuit pattern 52 and the insulating substrate 51, the interface between the insulating substrate 51 and the cooling plate 70, the cooling plate 70). The interface between the discharge electrode 1 and the discharge electrode 1 is a factor that reduces the cooling efficiency of the discharge electrode 1. Therefore, in order to ensure sufficient cooling capacity for the generation of condensed water, it is necessary to arrange a large number of thermoelectric elements 23, leading to an increase in the size of the entire device and a problem in that there is a limit to energy saving.

JP 2006000826 A

  The present invention has been invented in view of the above problems, and it is possible to achieve downsizing and energy saving of the entire apparatus while maintaining sufficient cooling capacity for generating condensed water on the discharge electrode. It is an object to provide an electrostatic atomizer.

  In order to solve the above-mentioned problems, the present invention provides an electrostatic atomizer that generates charged fine particle water by applying a voltage to condensed water generated by cooling the discharge electrode 1, in order to cool the discharge electrode 1. It is assumed that the heat absorption sides of a pair (P type and N type) of thermoelectric element units 2 provided are electrically connected via the discharge electrode 1.

  As described above, the energization between the pair of thermoelectric element portions 2 for cooling the discharge electrode 1 is performed via the discharge electrode 1 to be cooled, so that the thermoelectric element portion 2 and the discharge electrode 1 Many interfaces are not interposed between them, and the cooling efficiency of the discharge electrode 1 is improved. Therefore, it is not necessary to arrange a large number of thermoelectric elements 23 in order to configure the thermoelectric element section 2, and the entire apparatus can be reduced in size and energy can be saved.

  In the electrostatic atomizer of the present invention, a heat dissipation energization member 14 made of a conductive material is connected to the heat dissipation side of the thermoelectric element portion 2, and the thermoelectric element portion 2 is energized via the heat dissipation energization member 14. It is preferable to carry out. In this way, the entire apparatus can be further reduced in size by adopting a configuration in which both heat dissipation and energization are performed by the heat dissipation energization member 14.

  The heat dissipation energizing member 14 is preferably a member whose longitudinal direction is the energizing direction of the thermoelectric element portion 2. By doing in this way, the heat | fever discharge | released from the thermoelectric element part 2 can be transmitted to the side far away from the discharge electrode 1 which is a cooling object as much as possible through the said heat dissipation energization member 14. FIG. Therefore, the cooling capacity of the discharge electrode 1 can be improved. Moreover, the heat dissipation energizing member 14 itself can be arranged in a compact manner. In addition, the heat-dissipating energizing member 14, the thermoelectric element portion 2, the discharge electrode 1, and a series of conductors are formed in a slender bar shape as a whole, and the discharge electrode 1 is positioned at the tip thereof. Therefore, electric field concentration in the discharge electrode 1 at the tip is stabilized, and as a result, charged fine particle water can be stably generated.

  Furthermore, the heat dissipation energizing member 14 is preferably a member formed to have a larger diameter as the distance from the junction with the thermoelectric element portion 2 increases. By doing in this way, the external shape of the heat conduction energizing member 14, the thermoelectric element portion 2, the discharge electrode 1 and the entire conductor following the series becomes a shape in which the tip side where the discharge electrode 1 is located is made narrower. Therefore, the electric field concentration in the discharge electrode 1 at the tip is further stabilized. In addition, the heat dissipation area is increased on the large-diameter side of the heat dissipation energizing member 14 to improve the heat dissipation efficiency.

  Further, the joint portion where the thermoelectric element portion 2 is joined to the discharge electrode 1 and the joint portion where the thermoelectric element portion 2 is joined to the heat radiation energizing member 14 are sealed by a sealing portion 25 having waterproofness. Is also preferable. By doing in this way, it can prevent that corrosion arises in each joining location of the thermoelectric element part 2, and can achieve lifetime improvement. Further, the thermoelectric element portion 2 can be reinforced by the sealing portion 25.

  The sealing portion 25 is separated so that the joint portion where the thermoelectric element portion 2 is joined to the discharge electrode 1 and the joint portion where the thermoelectric element portion 2 is joined to the heat dissipation energizing member 14 are sealed separately. It is preferable that it is formed. By doing in this way, it can prevent that a heat | fever moves through the sealing part 25 between the thermal radiation side and the heat absorption side of the thermoelectric element part 2, and can ensure a cooling capability.

  The sealing portion 25 is preferably a coating layer 28 formed so as to cover a range from the discharge electrode 1 side to the heat dissipation energization member 14 side via the thermoelectric element portion 2. By doing so, the strength of the thermoelectric element portion 2 can be ensured by the coating layer 28. In addition, since the coating layer 28 can be formed thin, heat transfer through the coating layer 28 can be suppressed, and cooling capacity can be ensured.

  By the way, in the electrostatic atomizer of this invention, it is preferable to provide the counter electrode 11 in the position facing the said discharge electrode 1. FIG. By doing so, the electrostatic atomization phenomenon in the discharge electrode 1 can be stabilized, and the charged fine particle water can be stably generated from the discharge electrode 1.

  At this time, it is preferable that a housing 10 for supporting the counter electrode 11 is provided and the discharge electrode 1 is accommodated in the housing 10. By doing so, it is possible to stabilize the positional relationship between the electrodes 1 and 11 that have a sensitive influence on the discharge characteristics. In addition, an electrostatic atomization phenomenon at the discharge electrode 1 can be generated in the housing 10. Therefore, the charged fine particle water can be stably generated while suppressing the influence of the external environment.

  The casing 10 preferably fixes the heat-dissipating current-carrying member 14 at a predetermined position via a thermally conductive fixing body. By doing in this way, heat can also be radiated from the heat radiating energizing member 14 to the housing 10 through the fixed body, and the overall heat radiation efficiency can be improved.

  Moreover, it is preferable that the said housing | casing 10 forms the through-hole 17 for inserting the heat radiating electricity supply member 14 in the thick part 30 made thicker than the circumference | surroundings. By doing so, it is possible to stabilize the posture of the heat dissipation energizing member 14 and to increase the amount of heat released from the heat dissipation energizing member 14 to the housing 10 by increasing the contact area.

  Moreover, it is preferable that the said housing | casing 10 has the ventilation window 31 for external air introduction | transduction in the part surrounding the heat dissipation energization member 14. FIG. By doing in this way, external air can be introduce | transduced in the housing | casing 10 from the ventilation window 31 by natural convection or a forced convection, and the thermal radiation efficiency of the heat radiating current supply member 14 can be improved.

  Further, the housing 10 has a partition wall 32 that partitions an internal space into an electrostatic atomization space 33 in which the discharge electrode 1 is accommodated and a heat radiation space 34 in which the heat radiation energization member 14 is accommodated. preferable. By doing in this way, it can prevent that the air warmed in the thermal radiation space 34 flows into the electrostatic atomization space 33, and can improve cooling efficiency.

  The invention according to claim 1 has an effect that the entire apparatus can be reduced in size and energy can be saved while maintaining sufficient cooling capacity for generating condensed water on the discharge electrode.

  In addition to the effect of the invention according to claim 1, the invention according to claim 2 has the effect of improving the heat dissipation efficiency by a compact structure that performs heat dissipation and energization by one member.

  In addition to the effect of the invention according to claim 2, the invention according to claim 3 can improve the cooling capacity of the discharge electrode, stabilize the electric field concentration at the discharge electrode, and make the entire apparatus compact. There is an effect that it can be formed.

  In addition to the effect of the invention according to claim 3, the invention according to claim 4 has the effect of further improving the cooling capacity of the discharge electrode and further stabilizing the electric field concentration on the discharge electrode.

  In addition to the effect of the invention according to any one of claims 2 to 4, the invention according to claim 5 prevents corrosion at the joint portion of the thermoelectric element part and reinforces the thermoelectric element part, There is an effect of extending the life of the apparatus.

  In addition to the effect of the invention according to claim 5, the invention according to claim 6 has the effect of preventing the heat transfer through the sealing portion and ensuring the cooling capacity.

  In addition to the effect of the invention according to claim 5, the invention according to claim 7 has the effect of ensuring the strength of the thermoelectric element portion and ensuring the cooling capacity.

  In addition to the effect of the invention according to any one of claims 1 to 7, the invention according to claim 8 has an effect of stably generating charged fine particle water from the discharge electrode.

  In addition to the effect of the invention according to claim 8, the invention according to claim 9 has an effect of further stably generating charged fine particle water.

  In addition to the effect of the invention according to claim 9, the invention according to claim 10 has the effect of efficiently radiating heat from the heat-dissipating energizing member to the housing side and improving the overall heat radiation efficiency.

  In addition to the effect of the invention according to claim 9 or 10, the invention according to claim 11 stabilizes the posture of the heat-dissipating current-carrying member and increases the heat radiation amount from the heat-radiating current-carrying member to the housing. There is an effect of improving the heat radiation efficiency.

  In addition to the effect of the invention according to any one of claims 9 to 11, the invention according to claim 12 has the effect of introducing outside air into the housing and improving the heat dissipation efficiency of the heat dissipation energizing member. .

  In addition to the effect of the invention according to any one of claims 9 to 12, the invention according to claim 13 prevents warmed air on the heat dissipation space side from flowing to the electrostatic atomization space side, There is an effect of improving the cooling efficiency.

It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 1st example in embodiment of this invention. It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 2nd example in embodiment of this invention. It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 3rd example in embodiment of this invention. It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 4th example in embodiment of this invention. It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 5th example in embodiment of this invention. It is explanatory drawing which shows the basic composition of the electrostatic atomizer of the 6th example in embodiment of this invention. (A)-(e) is explanatory drawing which shows the modification of a discharge electrode. (A)-(f) is explanatory drawing which shows the modification of the electricity supply member for thermal radiation. (A), (b) is explanatory drawing which shows the other seed | species modification of the electricity supply member for thermal radiation. (A)-(d) is explanatory drawing which shows the modification at the time of providing a sealing part. (A), (b) is explanatory drawing which shows the modification which provided the thick part in the housing | casing. (A), (b) is explanatory drawing which shows the modification which provided the ventilation window in the housing | casing. It is explanatory drawing which shows the modification which has arrange | positioned two electrostatic atomization blocks in a housing | casing. (A)-(c) is explanatory drawing which shows the other modification which has arrange | positioned two electrostatic atomization blocks in the thermoelectric housing | casing. (A)-(c) is explanatory drawing which shows the modification which comprised the thermoelectric element part with the two thermoelectric elements. (A)-(c) is explanatory drawing which shows the other modification which comprised the thermoelectric element part with the two thermoelectric elements. It is explanatory drawing which shows the conventional electrostatic atomizer.

  The present invention will be described based on embodiments shown in the accompanying drawings. 1 to 6 show basic configurations of electrostatic atomizers of first to sixth examples in the embodiment of the present invention, respectively. In FIGS. 7-14, the modification of each member which comprises an electrostatic atomizer is each shown.

  In the following, the basic configuration of the electrostatic atomizers of the first to sixth examples will be described in detail.

  As shown in FIG. 1, the electrostatic atomizer of the first example includes a pair of P-type and N-type thermoelectric element portions 2 each including a thermoelectric element 23, and the discharge electrode 1 is disposed on the heat absorption side of both thermoelectric element portions 2. Are mechanically and electrically directly joined. As the thermoelectric element 23, a BiTe Peltier element is used. Here, the P-type thermoelectric element portion 2 is formed by one P-type thermoelectric element 23, and the N-type thermoelectric element portion 2 is similarly formed by one N-type thermoelectric element 23.

  The P-type thermoelectric element portion 2 may be formed by a plurality of P-type thermoelectric elements 23, and the N-type thermoelectric element portion 2 may be formed by a plurality of N-type thermoelectric elements 23 (based on FIG. 15). (Refer to a modification described later).

  The discharge electrode 1 has a shape in which a discharge portion 1b protrudes from a central portion of a flat base portion 1a, and is made of a metal such as brass, aluminum, copper, tungsten, or titanium. The end portion of the thermoelectric element portion 2 is soldered to the base portion 1 a of the discharge electrode 1. The material of the discharge electrode 1 is not limited to metal, and other materials such as conductive resin and carbon may be used as long as the material has high electrical conductivity. Further, the surface of the discharge electrode 1 may be plated with nickel in order to achieve good solder bonding with the thermoelectric element portion 2, or may be plated with gold or platinum in order to improve corrosion resistance. Good.

  The end portions on the heat radiation side of the thermoelectric element portions 2 that form a pair of P type and N type are respectively joined to terminals 4 formed on one side of the insulating plate 3. A fin-like heat radiating member 5 is joined to the other side of the insulating plate 3.

  One end side of the lead wire 9 is joined to each of the terminals 4, and the other end side of the lead wire 9 is electrically connected by the energizing path 6. A high voltage application unit 7 for applying a high voltage to the entire circuit is connected to the current path 6. In addition, a direct current power source 8 is interposed in the energization path 6 as an offset voltage application unit for applying an offset voltage between the two thermoelectric element units 2. The lead wire 9 is preferably as thick as possible or as large as possible in terms of heat dissipation.

  In the electrostatic atomizer of the first example configured as described above, the heat absorption sides of the pair of thermoelectric element portions 2 are electrically connected via the discharge electrode 1. Further, the heat radiation sides of the pair of thermoelectric element portions 2 are electrically connected via the terminal 4, the lead wire 9, and the energization path 6.

  In order to generate charged fine particle water, a high negative voltage is applied to the entire circuit by the high voltage application unit 7 and a current is passed between the thermoelectric element units 2 by the DC power source 8. A current flows from the N-type to the P-type between the two thermoelectric element portions 2, and the discharge electrode 1 is cooled by heat absorption on the side joined to the discharge electrode 1 to generate dew condensation water. The heat on the side of each thermoelectric element portion 2 joined to the insulating plate 3 is radiated through the heat radiating member 5. Then, the high voltage applied to the discharge electrode 1 by the high voltage application unit 7 causes an electrostatic atomization phenomenon in the condensed water on the surface of the discharge electrode 1 and generates a large amount of charged fine particle water having a nanometer size particle diameter.

  In the electrostatic atomizer of the first example, the heat absorption sides of the pair of thermoelectric element portions 2 provided for cooling the discharge electrode 1 are electrically connected via the discharge electrode 1. That is, the thermoelectric element portion 2 and the discharge electrode 1 have a structure in which they are directly joined without interposing members such as the circuit board 50 and the cooling plate 70 shown in FIG. Therefore, even with a compact and energy-saving structure in which only one pair of thermoelectric element portions 2 are arranged, the discharge electrode 1 can be cooled with high cooling efficiency and condensed water can be generated.

  In addition, since an insulator is not interposed between the discharge electrode 1 and the thermoelectric element portion 2, migration is prevented from occurring even if water adheres. Migration here refers to a phenomenon in which a metal material moves inside or on the surface of an insulator as water is adsorbed in the presence of current and voltage.

  Next, the electrostatic atomizer of the second example will be described based on FIG. In addition, about the structure similar to a 1st example, the same code | symbol is attached | subjected in a figure, detailed description is abbreviate | omitted, and only the structure peculiar to a 2nd example is explained in full detail below.

  In the electrostatic atomizer of the second example, a cylindrical housing 10 is joined to the heat radiating member 5. The casing 10 is formed using an insulating material, and accommodates the discharge electrode 1 in the internal space and supports the counter electrode 11 at a position facing the discharge electrode 1. The counter electrode 11 has a ring shape with a discharge hole 12 formed in the center, and is provided to be grounded.

  As the insulating material of the housing 10, a resin such as PBT, PPS, polycarbonate, liquid crystal polymer, ABS or the like is preferably used. In order to improve the heat dissipation of the heat radiating member 5, it is also preferable to mix a thermally conductive filler in the resin of the housing 10. In addition, as a material of the housing | casing 10, you may use metals, such as SUS, aluminum, an aluminum alloy, copper, and a copper alloy. In this case, an insulating material (not shown) is interposed between the housing 10 and the counter electrode 11.

  As the material of the counter electrode 11, a metal such as SUS, copper, or platinum, or a conductive resin is preferably used. Alternatively, the counter electrode 11 may be formed by patterning an electrode on the resin surface using a conductive material, or a material having high corrosion resistance such as gold or platinum may be used to improve the corrosion resistance of the counter electrode 11. It may be coated.

  The illustrated counter electrode 11 has a shape in which a discharge hole 12 is opened at the center of a flat plate, but may have another shape as long as it can stably generate an electrostatic atomization phenomenon. . For example, when the counter electrode 11 is formed in a dome shape surrounding the discharge electrode 1, the electric field is more easily concentrated on the discharge electrode 1.

  It is preferable to use a screw or an adhesive for joining the housing 10 and the counter electrode 11. When the material of the housing 10 is resin, the housing 10 and the counter electrode 11 may be joined by heat sealing.

  In the electrostatic atomizer of the second example having the above-described configuration, the counter electrode 11 is arranged in a fixed positional relationship with respect to the discharge electrode 1 via the housing 10, so that it is affected by the external environment. In addition, the electrostatic atomization phenomenon can be stably generated in the discharge electrode 1. Moreover, since the heat radiation on the heat radiating member 5 side is also performed through the housing 10, the cooling efficiency of the discharge electrode 1 is also improved.

  Next, the electrostatic atomizer of the third example will be described based on FIG. In addition, about the structure similar to a 1st example and a 2nd example, the same code | symbol is attached | subjected in a figure, detailed description is abbreviate | omitted, and only the structure peculiar to a 3rd example is explained in full detail below.

  In the electrostatic atomizer of the third example, the counter electrode 11 supported by the housing 10 is not grounded as in the second example, but the high voltage applying unit 7 is connected to the counter electrode 11 side, and the plus The high voltage is applied. The pair of thermoelectric element units 2 is provided with the circuit side to be energized grounded, and current is supplied from the N-type thermoelectric element unit 2 to the P-type thermoelectric element unit 2 by a DC power supply 8 provided in the circuit. I try to make it flow.

  When a current flows between the pair of thermoelectric element portions 2, the discharge electrode 1 is cooled to generate condensed water on the surface, and a high voltage is applied between the counter electrode 11 and the condensed water. As a result, electrostatic atomization occurs in the condensed water on the surface of the discharge electrode 1, and a large amount of charged fine particle water having a particle size of nanometer size is generated.

  Next, the electrostatic atomizer of the fourth example will be described based on FIG. In addition, about the structure similar to a 1st example, the same code | symbol is attached | subjected in a figure, detailed description is abbreviate | omitted, and only the structure peculiar to a 4th example is explained in full detail below.

  In the electrostatic atomizer of the fourth example, a heat radiating energizing member 14 made of a conductive and heat conductive material (brass, aluminum, copper, etc.) is connected to the heat radiating side of each of the pair of thermoelectric element portions 2. I am letting. The heat dissipating energizing member 14 is a long member whose longitudinal direction is the energizing direction (vertical direction in the drawing) of the thermoelectric element portion 2, and is connected to the thermoelectric element 23 constituting the thermoelectric element portion 1 on a one-to-one basis. I am letting.

  In the illustrated example, the heat-dissipating energizing member 14 is a rod-shaped member. However, as long as the energizing direction of the thermoelectric element portion 2 is the longitudinal direction, other shapes such as a plate shape, a spiral shape, and a corrugated shape are used. It may be a shape. Further, when the heat dissipating energizing member 14 is a rod-shaped member, various cross-sectional shapes are applicable, and a round bar shape, a square bar shape, or the like is preferably used.

  The rod-shaped heat-dissipating energizing member 14 is formed so as to have a larger diameter as the distance from the junction with the thermoelectric element portion 2 increases. In the illustrated example, the small diameter portion 14a gradually joined from the small diameter portion 14a to the large diameter portion 14b between the small diameter portion 14a on the side joined to the thermoelectric element portion 2 and the large diameter portion 14b on the side joined to the lead wire 9. By providing the taper part 14c which expands the diameter, the heat radiating energizing member 14 is formed.

  A holding member 15 is provided between a pair of adjacent heat-dissipating energizing members 14 to ensure insulation between them. The holding member 15 has a pair of through holes 16 through which the heat-dissipating current-carrying member 14 is inserted, and is made of an insulating material. Both through-holes 16 are formed in parallel with a predetermined distance therebetween.

  The heat dissipating energizing member 14 is fixed to the holding member 15 in a state where the large diameter portion 14 b is inserted into the through hole 16. The fixing may be press-fitting and fixing the heat-dissipating energizing member 14 into the through-hole 16 or fixing the heat-dissipating energizing member 14 in the through-hole 16 with an adhesive (not shown). Also good. In the case where an adhesive mixed with a heat conductive filler is used as the fixing adhesive, the heat dissipation of the heat dissipation energizing member 14 can be improved. That is, by fixing the heat-dissipating current-carrying member 14 to the holding member 15 via a thermally conductive fixing body such as the adhesive, the heat-dissipating property of the heat-dissipating current-carrying member 14 and thus the discharge electrode 1 by the thermoelectric element unit 2 The cooling property can be improved.

  As the insulating material of the holding member 15, a resin such as PBT, PPS, polycarbonate, liquid crystal polymer, or ABS is preferably used. In order to further improve the heat dissipation of the heat dissipation energization member 14, it is also preferable to mix a heat conductive filler in the resin of the holding member 15. In addition, as a material of the holding member 15, a metal such as SUS, aluminum, an aluminum alloy, copper, or a copper alloy may be used. In this case, an insulating material (not shown) is interposed between the holding member 15 and the heat dissipation energizing member 14.

  One end side of the lead wire 9 is joined to the end portion of the heat dissipation energizing member 14, and the other end side of the lead wire 9 is electrically connected by the energizing path 6. The point that the circuit is formed by connecting the high-voltage applying unit 7 and the DC power source 8 to the energizing path 6 is the same as in the first example.

  In the electrostatic atomizer of the fourth example configured as described above, the heat absorption sides of the pair of thermoelectric element portions 2 are electrically connected via the discharge electrode 1. Further, the heat dissipation sides of the pair of thermoelectric element portions 2 are electrically connected via the heat dissipation energizing member 14, the lead wire 9, and the energizing path 6.

  In order to generate charged fine particle water, a high negative voltage is applied to the entire circuit by the high voltage application unit 7 and a current is passed between the thermoelectric element units 2 by the DC power source 8. The discharge electrode 1 is cooled by the heat absorption of the two thermoelectric element portions 2 to generate condensed water. The heat radiation side of both thermoelectric element portions 2 is efficiently radiated through the bar-shaped heat radiation energizing member 14. Then, the high voltage applied by the high voltage application unit 7 causes an electrostatic atomization phenomenon in the condensed water on the surface of the discharge electrode 1, and generates a large amount of charged fine particle water having a particle size of nanometer size.

  In the electrostatic atomizer of the fourth example, the heat absorption sides of the pair of thermoelectric element portions 2 provided for cooling the discharge electrode 1 are electrically connected via the discharge electrode 1. In addition, a rod-shaped heat radiation energization member 14 made of a conductive material is connected to the heat radiation side of each thermoelectric element portion 2, and the thermoelectric element portion 2 is energized via the heat radiation current energization member 14. ing. Therefore, the discharge electrode 1 is cooled with high cooling efficiency and condensed water is generated by a compact and energy-saving structure in which the pair of thermoelectric element portions 2 and the pair of heat-dissipating current-carrying members 14 are electrically and mechanically joined. Can do.

  Further, in the electrostatic atomizer of the fourth example, the rod-shaped heat radiation energizing member 14, the thermoelectric element portion 2, the discharge electrode 1 and a series of conductors are formed in a slender rod shape as a whole, and the discharge electrode is formed at the tip thereof. 1 will be located. Therefore, electric field concentration in the discharge electrode 1 at the tip is stabilized, and as a result, generation of charged fine particle water is stabilized.

  Next, an electrostatic atomizer of a fifth example will be described based on FIG. In addition, about the structure similar to a 1st example and a 4th example, the same code | symbol is attached | subjected in a figure, detailed description is abbreviate | omitted, and only the structure peculiar to a 5th example is explained in full detail below.

  In the electrostatic atomizer of the fifth example, a cylindrical casing 10 is joined to a pair of heat dissipation energizing members 14. The bottomed cylindrical casing 10 is formed by forming a pair of through holes 17 in the bottom wall portion 10a for inserting the heat-dissipating energizing member 14, and is made of an insulating material. Both through-holes 17 are formed in parallel at a predetermined distance in order to ensure insulation between adjacent heat-dissipating current-carrying members 14.

  The heat dissipating energizing member 14 is fixed to the housing 10 in a state where the large diameter portion 14 b is inserted into the through hole 17. The fixing may be press-fitting and fixing the heat-dissipating energizing member 14 into the through-hole 17, or the heat-dissipating energizing member 14 may be fixed in the through-hole 17 with an adhesive. In the case where an adhesive mixed with a heat conductive filler is used as the fixing adhesive, the heat dissipation of the heat dissipation energizing member 14 can be improved. That is, by fixing the heat dissipating current-carrying member 14 to the housing 10 via a thermally conductive fixing body such as the above-mentioned adhesive, the heat dissipation of the heat-dissipating current-carrying member 14, and thus the discharge electrode 1 by the thermoelectric element unit 2. The cooling property can be improved.

  The casing 10 is formed using an insulating material, and accommodates the discharge electrode 1 in the internal space and supports the counter electrode 11 at a position facing the discharge electrode 1. The counter electrode 11 has a ring shape with a discharge hole 12 formed in the center, and is provided to be grounded.

  As the material of the housing 10, the same material as that shown in the second example may be used. In addition, the material and shape of the counter electrode 11 and the joining means between the housing 10 and the counter electrode 11 are preferably used as in the second example.

  In the electrostatic atomizer of the fifth example having the above-described configuration, the counter electrode 11 is arranged with a fixed positional relationship with respect to the discharge electrode 1 through the housing 10. Therefore, the electrostatic atomization phenomenon can be stably generated in the discharge electrode 1 without being affected by the external environment. Moreover, since the heat radiation through the bar-shaped heat radiation energizing member 14 is also performed through the housing 10, the cooling efficiency of the discharge electrode 1 is also improved.

  Next, an electrostatic atomizer of a sixth example will be described based on FIG. In addition, about the structure similar to a 4th example and a 5th example, the same code | symbol is attached | subjected in a figure, detailed description is abbreviate | omitted, and only the structure peculiar to a 6th example is explained in full detail below.

  In the electrostatic atomizer of the sixth example, the counter electrode 11 supported by the casing 10 is not grounded as in the fifth example, but the high voltage applying unit 7 is connected to the counter electrode 11 side. A positive high voltage is applied. In addition, the circuit side for energizing the pair of thermoelectric element portions 2 is grounded, and a current is supplied from the N-type thermoelectric element portion 2 to the P-type thermoelectric element portion 2 by a DC power supply 8 provided in the circuit. It is supposed to flow.

  When a current flows between the pair of thermoelectric element portions 2, the discharge electrode 1 is cooled to generate condensed water on the surface, and a high voltage is applied between the counter electrode 11 and the condensed water. Thereby, an electrostatic atomization phenomenon arises in the dew condensation water on the surface of the discharge electrode 1, and a large amount of charged fine particle water having a particle size of nanometer size is generated.

  The basic configuration of the electrostatic atomizers of the first to sixth examples has been described above. Below, the modification of each member which comprises the electrostatic atomizer of this invention is explained in full detail.

  FIG. 7 shows various modifications of the discharge electrode 1. In the electrostatic atomizers of the first to sixth examples, the tip of the discharge part 1b is inflated in a spherical shape, but the tip of the discharge part 1b is provided in a spherical shape that does not swell as shown in FIG. Alternatively, the tip of the discharge part 1b may be provided in a sharp shape as shown in FIG. The corner portion of the flat base portion 1a is preferably formed in a convex curved shape in order to avoid electric field concentration.

  Moreover, in the electrostatic atomizers of the first to sixth examples, the base portion 1a and the discharge portion 1b are integrally formed. However, as shown in FIG. 7C to FIG. You may comprise the base part 1a and the discharge part 1b by a different body. When different materials are used for the base part 1a and the discharge part 1b, a conductive material is used for the base part 1a and a heat conductive material is used for the discharge part 1b. As a material of the base part 1a, a metal or an insulator coated with a conductive material can be used. When the thermoelectric element portion 2 is soldered to the base portion 1a, the base portion 1a is formed of nickel, copper, or gold that can be soldered, or the surface of the base material 1 is covered with another base material 1a. It is preferable to form the part 1a. As the material of the discharge part 1b, a conductive material such as metal or carbon may be used, or an insulating material such as ceramic may be used.

  FIG. 7C shows the base part 1a and the discharge part 1b joined together with an adhesive or solder. Epoxy, urethane, acrylic, or the like is used as the adhesive, but it can be improved by adding a heat conductive filler or by adding a conductive filler. It is also preferable that it is improved.

  FIG.7 (d) joins the base part 1a and the discharge part 1b by welding. When welding is performed, the base part 1a and the discharge part 1b are both weldable metals. In order to perform quality stable joining, it is preferable to form the base part 1a and the discharge part 1b with the same material. In FIG. 7E, a recess 18 is provided in the central portion of the base portion 1a, and a convex body 19 provided on the base end surface of the discharge portion 1b is press-fitted into the recess 18 so that the base portion 1a. And the discharge part 1b are joined.

  8 and 9 show various modifications of the heat-dissipating current-carrying member 14 having a rod shape. In the electrostatic atomizers of the fourth to sixth examples, the cross-sectional shape of the heat dissipating energizing member 14 is not particularly limited, but the cross-sectional shape in the plane orthogonal to the longitudinal direction of the heat dissipating energizing member 14 is 8A and 8B may be circular, or other shapes such as a rectangular shape may be used. In the example shown in FIGS. 8C and 8D, the cross-sectional shape of the pair of heat-dissipating energizing members 14 is both semicircular, and the cylinder is elongated as a whole when the pair of heat-dissipating energizing members 14 are arranged side by side. It is provided so as to have a half-divided shape along the direction.

  8A to 8D, the small-diameter portion 14a and the large-diameter portion 14b are continuous in a tapered shape in the heat-dissipating current-carrying member 14; As shown in 8 (e) and (f), the diameter may be fixed.

  Moreover, you may comprise the electricity supply member 14 for thermal radiation by the combination of several members. In the modification shown in FIG. 9A, the heat conductive insulating member 20 and the conductive member 21 are combined to form the rod-shaped heat radiation energizing member 14. In the modification shown in FIG. 9B, a rigid member 22 for maintaining strength is embedded in the heat dissipation energizing member 14.

  FIG. 10 shows a modification in the case where the waterproof sealing portion 25 is provided around the thermoelectric element portion 2 in the electrostatic atomizers of the fourth to sixth examples. The sealing portion 25 seals at least a joint portion where each thermoelectric element portion 2 is joined to the discharge electrode 1 and a joint portion where each thermoelectric element portion 2 is joined to the heat radiation energizing member 14. I just need it.

  In the example shown in FIGS. 10A and 10B, an epoxy, urethane, acrylic adhesive, or the like 26 is used as the sealing portion 25. As the adhesive 26, a suitable one such as a one-component thermosetting type, a two-component type, a UV curing type, or an anaerobic type can be used. In addition, it is preferable to use an adhesive 26 having a low glass transition temperature so that excessive stress does not act on the thermoelectric element portion 2 and its joint portion.

  In the example of FIG. 10A, the surroundings of the pair of thermoelectric element portions 2 are all filled with an adhesive 26 having water resistance and insulation. That is, the adhesive 26 is used to dissipate heat from each thermoelectric element portion 2, the joint between each thermoelectric element portion 2 and the discharge electrode 1, the outer peripheral surface of each thermoelectric element portion 2, the gap between both thermoelectric element portions 2, and the like. All the joints with the current-carrying member 14 are sealed. The adhesive 26 can prevent corrosion of the joint portion and extend the life, and can protect the thermoelectric element portion 2 having relatively low strength.

  In the example of FIG. 10B, the bonding portion between each thermoelectric element portion 2 and the discharge electrode 1 and the heat dissipation energizing member 14 of each thermoelectric element portion 2 are bonded by an adhesive 26 having water resistance and insulation. Only the points are sealed separately. That is, a sealing portion 25 that seals a joint portion between each thermoelectric element portion 2 and the discharge electrode 1, and a sealing portion 25 that seals a joint portion between each thermoelectric element portion 2 and the heat radiation energizing member 14. , Separated and formed separately. In this case, heat transfer through the sealing part 25 can be prevented, and cooling capacity can be ensured.

  In the example shown in FIG. 10C, the range from the base portion 1a of the discharge electrode 1 to the distal end portion of the heat dissipation energizing member 14 via the thermoelectric element portion 2 is used as the sealing portion 25. It is enclosed and sealed by a resin frame 27 having insulating properties. As the resin of the frame body 27, PBT, PPS, polycarbonate, liquid crystal polymer, or the like can be used, and is preferably resistant to hydrolysis.

  In the example shown in FIG. 10D, a coating layer 28 having water resistance and insulation is provided as the sealing portion 25. The coating layer 28 is formed so as to cover the entire range from the base part 1a side of the discharge electrode 1 to the distal end part of the heat dissipation energizing member 14 via the thermoelectric element part 2. The coating layer 28 can prevent corrosion of the joint portion and extend the life, and can protect the thermoelectric element portion 2 having relatively low strength.

  The coating layer 28 is provided with a thickness of about 10 to 100 μm, and the cooling capacity is secured by suppressing heat transfer as much as possible. As the material of the coating layer 28, fluorine, epoxy resin, polyimide, polyolefin, acrylic, urethane, and polyvinyl-based materials can be used.

  In FIG. 11, in the case 10 of the electrostatic atomizer of the fifth example and the sixth example, a thick portion 30 in which the through-hole 17 for inserting the heat dissipation energizing member 14 is made thicker than the surroundings. The modification provided in is shown. In the example shown in FIG. 11A, a thick portion 30 is formed on the bottom wall portion 10a of the casing 10 having a bottomed cylindrical shape through a step structure. In the example shown in FIG. 11B, the thick portion 30 is formed on the bottom wall portion 10a of the casing 10 having a bottomed cylindrical shape via a taper structure that gradually increases the thickness.

  By providing both through-holes 17 in the thick portion 30 of the casing 10 that is thicker than the others, the posture of the heat-dissipating current-carrying member 14 is improved and the heat-dissipating current-carrying member is increased by increasing the contact area. The heat transfer from 14 to the housing 10 can be improved, and consequently the cooling efficiency of the discharge electrode 1 can be improved.

  FIG. 12 shows a modification in which a ventilation window 31 for introducing outside air is formed in the casing 10 of the electrostatic atomizer of the fifth example and the sixth example. The ventilation window 31 is formed by opening a plurality of openings in the peripheral wall portion 10 b of the casing 10 having a bottomed cylindrical shape, and external air flows into the casing 10 through the ventilation window 31.

  In the example shown in FIG. 12A, the ventilation window 31 of the housing 10 is formed in a portion surrounding the heat radiating energizing member 14 from the outside in the radial direction. When charged fine particle water is generated at the discharge electrode 1 by applying a high voltage and released toward the outside, an ion wind is generated in the housing 10 in a direction away from the discharge electrode 1 (upward in the figure). To do. Due to the natural convection generated by the ion wind, outside air is introduced into the housing 10 through the ventilation window 31 and passes near the surface of the heat-dissipating energizing member 14 to improve the heat dissipation efficiency of the heat-dissipating energizing member 14 (in the drawing). See arrow).

  In the example shown in FIG. 12B, a partition wall 32 that divides the internal space of the housing 10 into two is provided in the housing 10. The partition wall 32 extends inward from the peripheral wall portion 10 b of the housing 10, and the internal space of the housing 10 is divided into an electrostatic atomization space 33 and a heat dissipation space 34 through the partition wall 32. Partitioned. Thereby, the air heated in the heat radiation space 34 is prevented from flowing into the electrostatic atomization space 33 side.

  The electrostatic atomization space 33 is a space on the side where the discharge electrode 1 and a pair of thermoelectric element portions 2 for cooling the discharge electrode 1 are accommodated. The heat radiation space 34 is a space on the side where the pair of heat radiation energization members 14 are accommodated. The ventilation window 31 for introducing outside air is provided separately with a ventilation window 31a that opens to the electrostatic atomization space 33 side and a ventilation window 31b that opens to the heat dissipation space 34 side.

  Therefore, when charged fine particle water is generated at the discharge electrode 1 by applying a high voltage and released toward the outside, an ion wind is generated in the electrostatic atomization space 33 in a direction away from the discharge electrode 1, By the natural convection generated by the ion wind, outside air is introduced into the electrostatic atomization space 33 through the ventilation window 31a. That is, it is possible to generate ionic wind vigorously while introducing outside air through the ventilation window 31a, and discharge the charged fine particle water to the outside on the ionic wind.

  Further, in the heat radiation space 34, outside air is introduced through the ventilation window 31b by natural convection or forced convection, and passes near the surface of the heat radiation energization member 14 to improve the heat radiation efficiency of the heat radiation current energization member 14. In the example of FIG. 12B, a blower 35 such as a fan is disposed outside the housing 10, and outside air is sent into the heat radiation space 34 by forced air from the blower 35. The sent outside air is discharged to the outside through the opposite ventilation window 31b.

  FIGS. 13 and 14 show modifications in which a plurality of discharge electrodes 1 are arranged in a single housing 10 in the electrostatic atomizers of the fifth and sixth examples. Each discharge electrode 1 constitutes one electrostatic atomization block 40 by combining a pair of thermoelectric element portions 2 for cooling the discharge electrodes 1 and a pair of heat radiation current-carrying members 14 connected to each thermoelectric element portion 2. is doing. That is, the modification shown in FIGS. 13 and 14 is a modification in which a plurality of electrostatic atomization blocks 40 are arranged in the housing 10. 14B is a cross-sectional view taken along line AA in FIG. 14A, and FIG. 14C is a cross-sectional view taken along line BB in FIG.

  In the example shown in FIG. 13, two electrostatic atomization blocks 40 are arranged in parallel in the housing 10. Two pairs of through-holes 17 are formed in the bottom wall portion 10 a of the housing 10, and a pair of heat-dissipating current-carrying members 14 of each electrostatic atomization block 40 are fixed to each pair of through-holes 17. Yes. In the example of FIG. 13, the heat dissipating current-carrying members 14 of the adjacent electrostatic atomization blocks 40 are connected in series, but may be connected in parallel. Moreover, although the single counter electrode 11 for the plurality of discharge electrodes 1 is disposed, another counter electrode 11 may be disposed for each discharge electrode 1. According to the example of FIG. 13, the generation amount of charged fine particle water can be increased.

  The example shown in FIG. 14 is an example in which the shape of a pair of adjacent discharge electrodes 1 is arranged close to each other by dividing one discharge electrode 1 in half. Other configurations of the example shown in FIG. 14 are the same as those of the example shown in FIG. According to the modification shown in FIG. 14, the paired discharge electrodes 1 work like a single discharge electrode 1, and can generate condensed water and start electrostatic atomization in a short time.

  FIGS. 15 and 16 are modifications in which one thermoelectric element portion 2 is formed by a plurality of thermoelectric elements 23. That is, the P-type thermoelectric element portion 2 is formed by a plurality of P-type thermoelectric elements 23, and the N-type thermoelectric element portion 2 is formed by a plurality of N-type thermoelectric elements 23.

  In the example shown in FIG. 15, in the electrostatic atomizers of the first to third examples, the P-type thermoelectric element portion 2 is formed by two P-type thermoelectric elements 23, and two N-type thermoelectric elements 23 are also formed. This is an example in which an N-type thermoelectric element portion 2 is formed. The heat dissipation side of the two P-type thermoelectric elements 23 is joined to the terminal 4 on the negative electrode side. Further, the heat radiation side of the two N-type thermoelectric elements 23 is joined to the terminal 4 on the positive electrode side. Both terminals 4 are joined to one end side of the lead wire 9 and the other end side of the lead wire 9 is electrically connected to form a circuit.

  In the example shown in FIG. 15, by passing a current from the N type to the P type, the side joined to the discharge electrode 1 of the two N type thermoelectric elements 23 and the discharge electrode 1 of the two P type thermoelectric elements 23. The discharge electrode 1 is cooled by the endotherm together with the side bonded to the electrode. Therefore, compared with the case where the thermoelectric element part 2 is formed with one thermoelectric element 23, the cooling efficiency is improved.

  In the example shown in FIG. 16, in the electrostatic atomizers of the fourth to sixth examples, the P-type thermoelectric element portion 2 is formed by two P-type thermoelectric elements 23, and two N-type thermoelectric elements 23 are also formed. This is an example in which an N-type thermoelectric element portion 2 is formed. The heat radiation sides of the P-type and N-type thermoelectric elements 23 are both connected to a rod-shaped heat radiation energizing member 14.

  One end side of the lead wire 9 is joined to both ends of the heat dissipation energizing member 14 on both sides of the P type and the N type, and the other end side of the lead wire 9 is electrically connected to form a circuit. By passing a current from the N type to the P type through the lead wire 9, the two N type thermoelectric elements 23 and the two P type thermoelectric elements 23 together cool the discharge electrode 1, as in the example of FIG. To do.

  In the above, the modification of each member which comprises the electrostatic atomizer of this invention was explained in full detail based on FIGS. The configuration of each modification can be applied to any of the electrostatic atomizers of the first to sixth examples. Moreover, it is also possible to apply combinations of the configurations of the modified examples as appropriate.

DESCRIPTION OF SYMBOLS 1 Discharge electrode 2 Thermoelectric element part 10 Housing | casing 11 Counter electrode 14 Current supply member 17 for heat dissipation 17 Through-hole 20 Insulating member 25 Sealing part 28 Coating layer 30 Thick part 31 Ventilation window 32 Partition wall 33 Electrostatic atomization space 34 Heat dissipation space

Claims (13)

  In the electrostatic atomization device that generates charged fine particle water by applying a voltage to the dew condensation water generated by cooling the discharge electrode, the heat absorption sides of the pair of thermoelectric element units provided for cooling the discharge electrode, An electrostatic atomizer characterized in that it is electrically connected via the discharge electrode.   2. The electrostatic device according to claim 1, wherein a heat dissipation energizing member made of a conductive material is connected to the heat dissipation side of the thermoelectric element portion, and the thermoelectric element portion is energized through the heat dissipation energizing member. Atomization device.   The electrostatic atomizer according to claim 2, wherein the heat-dissipating energizing member is a member whose longitudinal direction is the energizing direction of the thermoelectric element portion.   The electrostatic atomizer according to claim 3, wherein the heat-dissipating energizing member is a member formed to have a larger diameter as the distance from the joining portion with the thermoelectric element portion increases.   3. The joint portion where the thermoelectric element portion is joined to the discharge electrode and the joint portion where the thermoelectric element portion is joined to the heat radiation energizing member are sealed by a waterproof sealing portion. The electrostatic atomizer as described in any one of -4.   The sealing part is formed by separating the joining part where the thermoelectric element part is joined to the discharge electrode and the joining part where the thermoelectric element part is joined to the heat radiation energizing member so as to be sealed separately. The electrostatic atomizer of Claim 5 characterized by the above-mentioned.   The electrostatic seal according to claim 5, wherein the sealing portion is a coating layer formed so as to cover a range from the discharge electrode side to the heat radiation energizing member side through the thermoelectric element portion. Atomization device.   The electrostatic atomizer according to claim 1, further comprising a counter electrode at a position facing the discharge electrode.   The electrostatic atomizer according to claim 8, further comprising a housing that supports the counter electrode, wherein the discharge electrode is accommodated in the housing.   The electrostatic atomizer according to claim 9, wherein the casing fixes the heat-dissipating current-carrying member at a predetermined position via a thermally conductive fixing body.   The electrostatic mist according to claim 9 or 10, wherein the casing is formed with a through-hole for inserting a heat-dissipating energizing member in a thick portion having a thickness larger than that of the surrounding area. Device.   The electrostatic atomizer according to any one of claims 9 to 11, wherein the casing has a ventilation window for introducing outside air at a portion surrounding the heat-dissipating energizing member. The said housing | casing has a partition wall which partitions internal space into the electrostatic atomization space in which a discharge electrode is accommodated, and the thermal radiation space in which the heat radiating electricity supply member is accommodated. The electrostatic atomizer described in 1.

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