JP4169018B2 - Electrostatic atomizer - Google Patents

Description

  The present invention relates to an electrostatic atomizer using a Peltier element.

  Conventionally, in the electrostatic atomizer 1 that atomizes the atomization water by applying a high voltage to the atomization electrode 3 by the high voltage generator 2, the atomization water is used by the user as shown in FIG. In order to save the trouble of replenishing water, there is known one that uses condensed water obtained by the cooling action of the Peltier element 4 as atomizing water (see, for example, Patent Document 1).

  In order to equip the electrostatic atomizer 1 with the Peltier element 4, the Peltier element 4 is disposed in the main body housing 6 of the electrostatic atomizer 1 in order to prevent damage and waterproofing of the Peltier element 4 due to thermal stress. The periphery of the element 4 is sealed with potting resin.

  By the way, although the power supply wiring 8 for power supply is extended from the Peltier element 4, the power supply wiring 8 is composed of a pair of flexible metal wires 8a having different polarities. The metal wire 8a is bent by the pouring pressure of the potting resin 7, and there is a fear that the pair of metal wires 8a come into contact with each other and the power supply wiring 8 is short-circuited. Furthermore, there is a risk that the potting resin leaks out of the main body housing 6 through the metal wire 8a bent downward by its own weight.

In the unitized electrostatic atomizer 1, a connector is attached to the tip of the power supply wiring 8, and a power line is detachably connected to the connector. The impact at that time reaches the Peltier element 4 via the power supply wiring 8, and in particular, there is a possibility that the connection portion between the power supply wiring 8 and the Peltier element 4 may be damaged.
JP 2005-131549 A

  The present invention has been made in view of the above-mentioned conventional problems, and can prevent a short circuit of the power supply wiring due to the potting resin injection work, and also prevent the potting resin from leaking out of the main body housing. Further, it is an object of the present invention to provide an electrostatic atomizer capable of preventing the Peltier element from being damaged by the operation of attaching and detaching the power supply line to the connector.

  In order to solve the above problems, an electrostatic atomizer according to claim 1 of the present invention includes a high-voltage generator 2 and a mist that atomizes atomization water using a high voltage applied by the high-voltage generator 2. The Peltier element 4 which connects the cooling side to the atomization electrode 3, the Peltier element 4 which obtains the dew condensation water as the water for atomization on the surface of the atomization electrode 3, and the radiation fin which is connected to the heat radiation side of the Peltier element 4 The Peltier element 4 is disposed below the atomization electrode 3 inside the main body housing 6, and the periphery of the Peltier element 4 is sealed with a potting resin 7. A power supply wiring 8 composed of a metal wire 8a having shape retention is extended outward from the Peltier element 4 so that a wiring housing passage 9 in which the power supply wiring 8 is arranged communicates with the main body housing 6 inside and outside. Formed and diagonally upward and outward to the power supply wiring 8 In addition to forming the inclined portion 80, the wiring storage passage 9 is provided with an upper inclined path 90 obliquely upward and outward, and the height position of the lower surface of the wiring storage passage 9 is positioned above the Peltier element 4. Features. According to this, since the power supply wiring 8 is composed of the metal wire 8a having self-holding property, it is possible to prevent the metal wire 8a from being bent due to the injection pressure of the potting resin 7 and short-circuiting between the metal wires 8a. In addition, an upper inclined portion 80 is formed in the power supply wiring 8 obliquely upward and outward, and an upper inclined path 90 obliquely upward and outward is formed in the wiring storage passage 9 in which the power supply wiring 8 is stored. Since the height position of the lower surface of the passage 9 is positioned above the Peltier element 4, the potting resin 7 that seals the periphery of the Peltier element 4 passes through the power supply wiring 8 and enters the wiring storage passage 9. Even so, the potting resin 7 stays in the wiring housing passage 9 and can be prevented from leaking out of the main body housing 6.

  According to a second aspect of the present invention, there is provided the electrostatic atomizer according to the first aspect, wherein the pair of vertical pieces 70 project outward from the wall outer surface 69 of the main body housing 6 where the wiring housing passage 9 opens. A lip piece 71 protrudes from the projecting tip of each of the vertical pieces 70 in the opposing direction of the vertical piece 70, and is surrounded by the wall outer surface 69, the vertical piece 70, and the lip piece 71 to form the connector housing portion 11. A connector 10 to which a power supply line is connected is attached to the tip of the power supply wiring 8, and the connector 10 is fitted and accommodated in a connector accommodating portion 11. According to this, when the power supply line is pressed against the connector 10 housed in the connector housing portion 11, the pushing force is received by the wall outer surface 69, and the power supply line is removed from the connector 10. In this case, the pulling force is received by the lip piece 71, that is, the impact when the power supply line is attached to and detached from the connector 10 is received by the connector housing portion 11, so that it does not reach the Peltier element 4, and It is possible to prevent the Peltier element 4 from being damaged by an impact when the power supply line is attached or detached.

  The electrostatic atomizer according to a third aspect is the electrostatic atomizer according to the first or second aspect, wherein the main body housing 6 is placed and fixed on the upper surface of the radiating fin 5, and between the upper surface of the radiating fin 5 and the lower surface of the main body housing 6. A ring-shaped resin leakage prevention material 12 having elasticity is provided so as to surround the side of the Peltier element 4, and ring protrusions 93, 94 extending over the entire circumference on the lower and upper surfaces of the resin leakage prevention material 12, respectively. The ring protrusion 94 on the lower surface of the resin leakage prevention material 12 is elastically contacted with the upper surface of the heat radiation fin 5 and the ring protrusion 93 on the upper surface of the resin leakage prevention material 12 is elastically contacted with the lower surface of the main body housing 6. It is characterized by. According to this, the potting resin 7 is injected around the Peltier element 4, that is, inside the ring-shaped resin leakage prevention material 12, and each ring protrusion 93, provided on the upper and lower surfaces of the resin leakage prevention material 12, Since 94 is elastically contacted and sealed to the lower surface of the main body housing 6 and the upper surface of the heat radiating fin 5, it is possible to effectively prevent the potting resin 7 from leaking out of the main body housing 6.

  The present invention has the advantage of preventing the short circuit of the power supply wiring due to the potting resin injection work, has the advantage of effectively preventing the leakage of the potting resin out of the main body housing, There is an advantage that the Peltier element can be prevented from being damaged by the operation of attaching and detaching the power supply line to the connector.

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

  The electrostatic atomizer 1 includes a high voltage generator 2, an atomization electrode 3 that atomizes the water for atomization by the high voltage applied by the high voltage generator 2, and a cooling side of the atomization electrode 3. The atomizing electrode 3 includes a Peltier element 4 that obtains condensed water as the atomizing water on the surface of the atomizing electrode 3 and a radiation fin 5 that is coupled to the heat radiation side of the Peltier element 4. The Peltier element 4 is housed in a main body housing 6, and the main body housing 6 is mounted and fixed on the heat radiating fins 5 to form an integrated electrostatic atomizing unit 1 a.

  As shown in FIG. 3 and FIG. 6A, the main body housing 6 is a resin body that has been subjected to a charge removal process, and has a cylindrical tube portion 14 that has an internal hole 13 that opens up and down. A flange portion 15 having a rectangular shape in plan view is provided on the lower end portion of the cylindrical portion 14 so as to protrude laterally. A concave step 16 that is recessed upward is formed on the lower surface of the main body housing 6. As shown in FIGS. 4 and 5, the main body housing 6 is provided with the lower surface excluding the concave step portion 16 placed on the upper surface of the heat radiation fin 5 and provided in the through holes 17 provided in the four corners of the flange portion 15 and the heat radiation fin 5. The screw hole 18 is matched with the screw hole 18 and the screw 20 is inserted through the washer 19 from above through the through hole 17 and the screw hole 18 in this order, and is screwed into the upper surface of the radiating fin 5. Thus, a housing housing space 21 is formed between the heat radiation fin 5 and the main body housing 6 by the recessed step portion 16. In the housing housing space 21, as will be described later, a part of the atomizing electrode 3 (insulating heat transfer plate 40), the Peltier element 4, and the potting resin 7 that seals the periphery of the Peltier element 4 out of the main body housing 6. The resin leakage prevention material 12 etc. which prevent the leakage of this are arrange | positioned. In the side portion of the main body housing 6, an application plate storage portion 22 that stores a high voltage application plate described later, a wiring storage passage 9 that stores a power supply wiring 8 extended from a Peltier element 4 described later, and this A connector housing portion 11 that communicates with the wiring housing passage 9 and houses a connector 10 attached to a power supply wiring 8 to be described later is provided opposite to the connector housing portion 11. The application plate storage part 22, the wiring storage path 9, and the connector storage part 11 will be described in detail later.

Here, a lower opening 13 a of the internal hole 13 is opened on the ceiling surface of the recessed step portion 16 that faces the upper surface of the heat radiating fin 5 with a gap. The lower opening 13a of the internal hole 13 is formed in a rectangular hole shape by an edge projecting wall 23 protruding inward over the inner peripheral surface of the cylindrical portion 14, and the lower opening 13a having the rectangular hole shape is opposed to the lower opening 13a. Between the corners, a pair of crosspieces 24 are installed from the inner end surface of the edge protruding wall 23 so as to be orthogonal to each central portion. That is, the pair of crosspieces 24 has a lower opening 13a of the inner hole 13 formed between them. four is divided into small openings 13a _1. An orthogonal portion of the pair of crosspieces 24 is formed as a thin portion 25 whose thickness is reduced upward, and an electrode insertion hole 26 is formed so as to penetrate vertically. Further, projecting leg portions 27 are provided so as to hang downward from the crosspieces 24 around the orthogonal portion and to make the lower surface abut against an insulating heat transfer plate 40 described later.

  In this example, the atomizing electrode 3 is composed of a metal needle-shaped atomizing electrode 30 and a counter electrode 31 disposed opposite to the atomizing electrode 30. The atomizing electrode 30 is an electrode for generating a nanometer-size mist by atomizing the atomizing water when a high voltage is applied by the high voltage generator 2. Even if the atomizing electrode 3 is composed only of the atomizing electrode 30, nanometer-sized mist can be obtained. In this example, the atomizing electrode 30 contributes to improvement of atomization efficiency and stable release of mist. The atomizing electrode 3 is configured by adopting the counter electrode 31 to be used.

  Specifically, the counter electrode 31 is a plate-like electrode formed by integrally projecting a connection piece 33 on the side of an annular main body 32 as shown in FIG. 3, and as shown in FIG. The projections 28 projecting from the upper end of the cylindrical portion 14 of the main body housing 6 are respectively fitted into the plurality of mounting holes 34 provided in the position 32 and positioned so as to cover the upper opening 13 b of the inner hole 13. Arranged. Further, as shown in FIGS. 3 and 6B, the atomizing electrode 30 has a rod-like main body portion 35 extending vertically, and a throttle portion having a diameter gradually reduced at the upper end of the main body portion 35. 36 is formed, and a circular spindle-shaped atomizing portion 37 in which the atomizing water is atomized is formed above the throttle portion 36 (that is, the upper end of the atomizing electrode 30). In addition, a large-diameter portion 38 having a diameter slightly larger than the diameter of the main portion 35 is formed in the lower portion of the main portion 35, and further below the large-diameter portion 38 (that is, the lower end of the atomizing electrode 30). A ground plate 39 having a large diameter is formed, and a horizontal plate-like insulating heat transfer plate 40 having a good thermal conductivity and being electrically insulated is fixed to the lower surface of the ground plate 39 with solder or the like. ing. As shown in FIG. 1, the atomizing electrode 30 has the main body portion 35 inserted into the electrode insertion hole 26 of the crosspiece 24 and the lower surface of the leg portion 27 of the crosspiece 24 is in contact with the insulating heat transfer plate 40. The main body housing 6 is disposed across the inner hole 13 and the recessed step portion 16. Specifically, the atomizing portion 37 of the atomizing electrode 30 is positioned in the inner hole 13 of the cylindrical portion 14 so as to face the counter electrode 31, and the grounding stand 39 is a crosspiece 24 in the lower opening 13 a of the inner hole 13. The insulating heat transfer plate 40 is positioned in the upper part of the housing housing space 21.

  A high voltage is applied between the atomizing electrode 30 constituting the atomizing electrode 3 and the counter electrode 31 by the high voltage generator 2, but the counter electrode 31 has a high voltage applied to its connecting piece 33. The generator 2 is connected, and the high voltage generator 2 is connected to the atomizing electrode 30 via a high voltage application plate 41. Here, as shown in FIG. 3, the high voltage application plate 41 becomes a device connection portion 42 connected at one end to the high voltage generator 2, and becomes an electrode connection portion 43 connected at the other end to the atomizing electrode 30. A long metal plate is formed with an inclined step 44 at the center in the length direction so that the device connection 42 is at the upper position and the electrode connection 43 is at the lower position. For convenience, a portion from the inclined step portion 44 to the electrode connecting portion 43 is referred to as a distal end portion 41a, and a proximal end portion 41b from the inclined step portion 44 to the device connecting portion 42 is referred to. Further, the electrode connection portion 43 is bifurcated into a left and right direction by a slit, and a connection hole 45 is formed in the slit. Further, a positioning through hole 46 penetrating vertically is formed in the distal end side portion 41a. As shown in FIG. 1, the high voltage application plate 41 is accommodated and disposed in the application plate accommodating portion 22 that extends inside and outside the main body housing 6, and the device connection portion 42 is projected and positioned outside the main body housing 6. The electrode connecting portion 43 is connected to the atomizing electrode 30 disposed in the main body housing 6. The electrode connecting portion 43 is connected to the atomizing electrode 30 below the inner hole 13 which is a space below the thin portion 25 secured by the thin portion 25 and the leg portion 27 of the crosspiece 24 of the main body housing 6. This is performed in the space in the opening 13a, and the connection hole 45 is elastically fitted to the large diameter portion 38 of the atomizing electrode 30 so that the lower surface of the electrode connection portion 43 is brought into contact with the upper surface of the grounding table 39. It is done by that.

  The application plate housing portion 22 is a gap space formed by a main body side recess 47 formed in the main body housing 6 and an application plate pressing member 29 described later. As shown in FIG. 6A, the body-side recess 47 of the application plate housing portion 22 is a recess that is opened downward by being recessed upward from the lower surface of the body housing 6, and the ceiling of the recessed step portion 16. The groove portion 48 is recessed upward from the surface, and the presser material insertion recess 49 is communicated with the groove portion 48 and the bottom surface of the flange portion 15 is recessed upward. One end of the recessed groove portion 48 opens to the inner edge surface of the lower opening 13 a of the inner hole 13 of the cylindrical portion 14 positioned below the crosspiece 24, and the ceiling surface of the recessed groove portion 48 and the ceiling of the presser material insertion recess 49. It continues with the inclination recessed part 50 which has a ceiling surface which inclines a surface toward an outer side upper direction. That is, the ceiling surface of the presser material insertion recess 49 is positioned higher than the ceiling surface of the recessed groove portion 48. Further, a positioning projection 51 is formed to hang downward from the ceiling surface of the concave groove portion 48. The presser material insertion recess 49 is opened not only below but also on the outer side of the main body housing 6. On the vertical inner surface facing the left and right of the presser material insertion recess 49, a pair of vertical ridges that are long in the vertical direction are provided. 52 are provided so as to face each other, and an inclined ridge 53 is provided on each longitudinal inner surface along the ceiling surface of the inclined recess 50, and each vertical ridge 52 is formed at the upper end of the inclined ridge 53. In other words, a triangular groove 54 that opens downward is formed between the vertical protrusion 52 and the inclined protrusion 53.

  The application plate pressing member 29 is a block-shaped resin body that has been subjected to a charge removal process that is inserted and disposed in the main body side recess 47 of the application plate storage unit 22 as shown in FIG. 3 and FIG. A central inner vertical piece 56 and a tall outer vertical piece 57 are erected from both ends of the horizontal bottom piece 55 so as to oppose each other and connect the left and right central portions of the inner vertical piece 56 and the outer vertical piece 57. The piece 58 is erected from the bottom piece 55, and an inclined portion 56 a that is inclined upward toward the outer vertical piece 57 is formed on the inner vertical piece 56, and the inner vertical piece 56, the outer vertical piece 57, and the central vertical piece 58 are formed. A pair of insertion grooves 59 that are open upward and to the left and right are provided between them. In order to dispose the application plate pressing member 29 in the pressing member insertion recess 49 of the main body side recess 47, the vertical protrusions 52 of the main body side recess 47 are formed in the insertion grooves 59 of the corresponding application plate pressing member 29. Each is inserted from above, and the inclined portion 56a of the inner vertical piece 56 of the application plate pressing member 29 is inserted into the triangular groove 54 of the main body side recess 47 from below.

  In the state where the application plate pressing member 29 is disposed in the main body side recess 47, the upper surface of the application plate pressing member 29 is disposed opposite to the ceiling surface of the main body side recess 47 at a predetermined interval as shown in FIG. Thus, the gap space that constitutes the application plate storage portion 22 that extends from the lower opening 13a of the inner hole 13 of the cylindrical portion 14 that is the inner portion of the main body housing 6 to the outside of the main body housing 6 from the housing storage space 21 is a high-pressure application plate. It is formed so as to match the shape of 41. That is, in the high voltage application plate 41 disposed in the main body housing 6, the electrode connecting portion 43 is connected to the atomizing electrode 30 in the lower opening 13 a of the inner hole 13 of the main body housing 6, and the distal end side portion 41 a is recessed on the main body side. In the recessed groove portion 48 of the place 47, the inclined step portion 44 is located in the inclined recessed portion 50, and the proximal end portion 41b is located in the presser material insertion recess 49, respectively. By attaching the application plate pressing member 29 from below in 49, the application plate storage portion 22 is housed and disposed. Note that the positioning through hole 46 of the high voltage application plate 41 arranged in the application plate storage portion 22 is positioned in the concave groove portion 48 and is fitted to the positioning projection 51, so that the strong position regulation of the high voltage application plate 41 is restricted. Has been done.

  In order to generate mist with the atomizing electrode 30, atomizing water is required. In the electrostatic atomizing apparatus 1 of this example, the user does not need to replenish the atomizing water and the atomizing water is removed. In order to cover automatically, the condensed water generated on the surface of the atomizing electrode 30 is used as the atomizing water, and the atomizing electrode is generated on the surface of the atomizing electrode 30. A Peltier element 4 is used to cool 30. The Peltier element 4 is formed in a horizontal plate shape whose upper surface is a cooling surface and its lower surface is a heat dissipation surface when power is supplied. As shown in FIG. The heat sink 60 is brought into contact with the lower surface of the insulating heat transfer plate 40 fixed to the atomizing electrode 30 via the thermal grease 60, and the lower surface serving as the heat radiating surface is attached to the heat radiating fins 5 via the heat radiating sheet 61 having good thermal conductivity. It is made to contact | abut and is arrange | positioned in the storage space 21 in a housing. Here, in this example, silicon grease is used for the heat transfer grease 60, and a silicon sheet is used for the heat dissipation sheet 61. In any case, insulating heat transfer is performed by filling in the minute unevenness on the cooling surface and the heat dissipation surface of the Peltier element 4. The heat transfer efficiency to the plate 40 and the heat radiating fins 5 is improved. The Peltier element 4 is easily damaged by the thermal stress generated between the cooling surface and the heat radiating surface. Since the Peltier element 4 is weak against water, the periphery of the Peltier element 4 is sealed with a potting resin 7. In order to prevent the potting resin 7 from leaking out of the main body housing 6, a resin leakage prevention material 12 is also disposed in the housing housing space 21. The resin leakage prevention material 12 will be described in detail later.

By the way, since the water for atomization is required only in the atomization part 37 of the electrode 30 for atomization in which atomization is performed, dew condensation water is used only in the atomization part 37 (and the vicinity part) of the electrode 30 for atomization in this example. A heat insulating cover 62 is attached to the atomizing electrode 30 so as to generate the above. The heat insulating cover 62 is formed of a foamed resin body having good heat insulating performance, and a bulging portion 64 (FIG. 1) protruding upward is formed at the center of the disc-shaped main body 63 as shown in FIG. An electrode through-hole 65 is formed in the central portion of the bulging portion 64 so as to penetrate vertically and cover the surface of the main portion 35 of the atomizing electrode 30. A fitting protrusion 66 is formed to be fitted into the small opening 13a ₁ , and a plurality of guide protrusions extending vertically are formed on the inner surface of the inner hole 13 of the cylindrical portion 14 on the side end surface of the main body 63. A notch hole-like protrusion insertion portion 68 through which 67 is inserted is formed. The heat insulating cover 62 is inserted into the inner hole 13 of the cylindrical portion 14 of the main body housing 6 by sliding the protrusion insertion portion 68 into the guide protrusion 67 from the upper opening 13b, and is positioned above the crosspiece 24. The heat insulating cover 62 covers the surface of the main portion 35 of the atomizing electrode 30 so as to contact the air with the atomizing portion 37 of the atomizing electrode 30. (And the vicinity part) can be limited, and the production | generation of excessive dew condensation water is avoided.

  Here, as shown in FIG. 6C, a power supply wiring 8 for supplying power to the Peltier element 4 is extended laterally from the Peltier element 4, and a power source is connected to the tip of the power supply wiring 8. A connector 10 for connecting a power line extending from a portion (not shown) is attached. The power supply unit may be provided separately from the high voltage generator 2 or may be shared by the high voltage generator 2. Each of the power supply wirings 8 is composed of a pair of metal wires 8a having different polarities extending from the heat radiation side electrode of the Peltier element 4 and arranged in the left and right directions. For example, a metal wire 8a having a diameter of 0.5 mm or more is used. Specifically, the power supply wiring 8 is formed with an upper inclined portion 80 that extends from the Peltier element 4 and immediately bends obliquely upward and outward and extends obliquely upward, and is bent from the upper inclined portion 80 and substantially vertical. A lower inclined portion 81 extending downward is formed, bent substantially horizontally outward from a portion of the lower inclined portion 81 corresponding to a height position of about half of the upper end position of the upper inclined portion 80, and substantially horizontally outward. A horizontal portion 82 extending toward the end is formed, and the connector 10 is attached to the tip of the horizontal portion 82. In other words, the power supply wiring 8 of this example is formed in a mountain shape that protrudes upward at the upper inclined portion 80 and the lower inclined portion 81. When the Peltier element 4 is disposed in the housing housing space 21, the connector 10 is housed in the connector housing portion 11 provided facing the outside of the main body housing 6, and the power supply wiring 8 is housed in the housing. It is stored in the wiring storage passage 9 that communicates the connector storage portion 11 from the space 21.

  As shown in FIGS. 2 and 4, the connector housing portion 11 has a pair of vertical pieces 70 projecting outward from the wall outer surface 69 of the main body housing 6 facing the outside of the main body housing 6, and these vertical pieces. A lip piece 71 protrudes from each projecting tip of 70 in the opposite direction of the vertical piece 70 and is surrounded by the wall outer surface 69, the vertical piece 70, and the lip piece 71. In the connector housing portion 11, the connector 10 attached to the tip of the power supply wiring 8 is surrounded by the wall outer surface 69, the vertical piece 70, and the lip piece 71 and arranged in a fitted state. The outlet 10 a is positioned so as to face the outside of the main body housing 6 from between the pair of lip pieces 71. That is, when the plug of the power supply line is pressed against the attachment / detachment port 10a of the connector 10 accommodated in the connector accommodating portion 11, the pressing force is received by the wall outer surface 69 of the connector accommodating portion 11, and the connector When the plug of the power supply line is pulled out from the ten attachment / detachment openings 10 a, the pulling force is received by the lip piece 71 of the connector housing portion 11. As described above, the impact when the power supply line is attached to or detached from the connector 10 is received by the connector housing portion 11, so that the impact does not reach the Peltier element 4. Is prevented from being damaged.

  The wiring housing passage 9 is constituted by a gap space formed by inserting an insertion protrusion 84 of a resin leakage prevention material 12 (described later) into a main body side recess 47 formed in the main body housing 6. The concave step portion 16 of the main body housing 6 is formed with a concave step portion extending portion 16a communicating with the connector housing portion 11, but the main body side recess 72 of the wiring housing passage 9 is formed as shown in FIG. As described above, the concave step portion 16 is a groove-like recess having a width substantially the same as that of the metal wire 8a in which the ceiling surface of the concave step portion extension portion 16a is recessed upward, and this recess opens downward. In addition, one end opens to the inner edge surface of the lower opening 13a of the inner hole 13 of the cylindrical portion 14, and the other end opens to the wall outer surface 69 facing the connector housing portion 11 described later. Specifically, the body-side recess 72 of the wiring storage passage 9 has an upper inclined recess 73 that is recessed obliquely upward and outward immediately from a portion that opens to the lower opening 13a of the inner hole 13 of the cylindrical portion 14. It has a lower inclined concave portion 74 that is recessed substantially vertically downward from the upper end portion of the upper inclined concave portion 73, and is substantially from the portion of the lower inclined concave portion 74 corresponding to a height position that is approximately half the upper end position of the upper inclined concave portion 73. A horizontal concave portion 75 that is bent outward and extends substantially outward is formed, and the tip of the horizontal concave portion 75 opens on the wall outer surface 69 of the connector housing portion 11. That is, the upper inclined concave portion 73 and the lower inclined concave portion 74 are formed in a concave shape having an upwardly convex mountain-shaped cross section.

  The resin leakage prevention material 12 is a ring-shaped elastic resin body disposed so as to surround the side of the Peltier element 4 in the recessed step portion 16, and in this example, is made of a foamed resin having excellent heat insulation properties. Yes. Specifically, as shown in FIGS. 3 and 6 (d), the resin leakage prevention member 12 has a rectangular inner hole 76 penetrating vertically so as to position the Peltier element 4, and an outer diameter thereof. A rectangular ring plate-shaped main body portion 77 substantially matching the inner diameter of the concave step portion 16, a rectangular plate-shaped application plate blocking portion 78 for closing the lower opening of the main body side recess 47 of the application plate storage portion 22, and wiring It is integrally formed with a rectangular plate-like wiring closing portion 79 that closes the lower opening of the main body side recess 72 of the storage passage 9. In addition, press-fitting protrusions 83 project from the outer diameter end surface portion of the main body 77 toward the side at appropriate intervals, and the upper surface of the wiring blockage 79 has a main body side recess 72 of the wiring housing passage 9. An insertion protrusion 84 to be inserted into the inside protrudes upward. The insertion protrusion 84 is formed in a mountain shape that protrudes upward in the same shape as the power supply wiring 8, and more specifically, an upper inclined protrusion 85 that is inclined obliquely upward and outward from the inner hole 76 side, and an upward inclination Continuing from the convex part 85, it has the downward inclination convex part 86 which inclines substantially perpendicularly downward. The power supply wiring 8 is composed of a pair of metal wires 8a, and the wiring housing passage 9 is provided corresponding to each metal wire 8a. Two recesses corresponding to the wire 8a are arranged side by side, and the insertion protrusion 84 is also formed by arranging two protrusions in parallel.

  When the resin leakage prevention material 12 is disposed in the housing storage space 21, the press-fitting protrusion 83 is elastically contacted with the inner surface of the concave step portion 16 of the main body housing 6 and is fitted into the concave step portion 16 in a press-fit state. The insertion protrusion 84 of the resin leakage prevention member 12 is inserted into the main body side recess 72 of the wiring housing passage 9 from below. Specifically, the upper inclined convex portion 85 and the lower inclined convex portion 86 of the insertion protrusion 84 are inserted into the upper inclined concave portion 73 and the lower inclined concave portion 74 of the main body side recess 72. The upper surface is opposed to the ceiling surface of the main body-side recess 72 at a predetermined interval, so that a gap space that forms the wiring housing passage 9 from the housing housing space 21 to the connector housing portion 11 is formed. The wiring storage passage 9 formed in this way has a hole-like upper slope extending obliquely outward and upward by the upper sloped recess 73 and the upper sloped convex part 85 of the insertion protrusion 84 facing each other. A path 90 is formed, and a hole-shaped lower inclined path 91 extending in a substantially vertical downward direction is formed by the lower inclined concave part 74 of the main body side recess 72 and the lower inclined convex part 86 of the insertion protrusion 84, facing each other. The horizontal recess 92 of the main body side recess 72 and the upper surface of the resin leakage prevention material 12 are formed with a horizontal path 92 extending substantially horizontally outward so as to match the shape of the power supply wiring 8. Is formed. That is, the power supply wiring 8 disposed in the wiring storage passage 9 has an upper inclined portion 80 on the upper inclined passage 90, a lower inclined portion 81 on the lower inclined passage 91, and a horizontal portion 82 on the horizontal. They are respectively arranged in the paths 92 and are accommodated in the wiring accommodating passages 9. In this example, the wiring housing passage 9 is filled with an adhesive 87 (FIG. 1) to fix the power supply wiring 8 to the main body housing 6.

  As described above, the periphery of the Peltier element 4 is sealed with the potting resin 7. Specifically, the potting resin 7 is injected into the space between the Peltier element 4 and the resin leakage prevention material 12 in the housing storage space 21 (that is, the inner portion of the inner hole 76 of the resin leakage prevention material 12). The potting resin 7 is intended to waterproof the Peltier element 4 and to improve durability against thermal stress generated between the heat radiating surface and the cooling surface. Therefore, at least the periphery of the Peltier element 4 may be sealed. In order to seal the periphery of the Peltier element 4 with the potting resin 7, the potting resin injection pipe 88 for injecting the potting resin 7 is inserted into the housing housing space from the upper opening 13 b of the internal hole 13 of the main body housing 6 as shown in FIG. 21. The potting resin 7 is injected and the potting resin 7 is hardened, and the potting resin 7 is injected into the concave step 16 as will be described later. This is performed before the heat insulating cover 62 is mounted in the cylindrical portion 14 after the housing has been stored, and the potting resin is formed from the notch hole 23a formed vertically in the edge protruding wall 23 that borders the lower opening 13a of the inner hole 13. The injection tube 88 is inserted to at least a position below the insulating heat transfer plate 40, and the potting resin 7 is injected into the inner hole 76 of the resin leakage prevention material 12. It has been performed by such. According to this, the trouble that the potting resin 7 does not spread around the Peltier element 4 or air remains inside the hardened potting resin 7 can be eliminated as much as possible. A good finish is ensured for the sealing of the surroundings.

  By the way, in the potting resin 7 for sealing the Peltier element 4, in the conventional electrostatic atomizer 1, the pair of metal wires 8 a constituting the power supply wiring 8 are bent and contacted by the injection pressure. There is a risk that the potting resin 7 injected into the main body housing 6 may leak out of the main body housing 6, but in the electrostatic atomizer 1 of this example, the short circuit of the power supply wiring 8 or the potting resin 7 has been devised to effectively prevent leakage.

  That is, the power supply wiring 8 of this example is composed of the metal wire 8a having self-holding property as described above. Therefore, the shape of the metal wire 8a constituting the power supply wiring 8 is maintained as it is even if the injection pressure of the potting resin 7 is received, and the metal wire 8a is bent and the metal wires 8a are short-circuited as in the prior art. This is prevented.

  Further, as one form of leakage of the potting resin 7, a form in which the potting resin 7 leaks out of the main body housing 6 through the power supply wiring 8 can be considered, but the potting resin 7 extends from the Peltier element 4 of this example. In the power supply wiring 8, an upper inclined portion 80 that extends obliquely upward and outward is formed, and an upper inclined path 90 that extends obliquely upward and outward is formed in the wiring storage passage 9 that stores the power supply wiring 8. Since the height position of the lower surface of the wiring housing passage 9 (the upper surface of the insertion protrusion 84) is positioned higher than the Peltier element 4, the potting resin 7 for sealing the periphery of the Peltier element 4 is the power supply wiring 8. The potting resin 7 stays in the wiring housing passage 9 and can be prevented from leaking out of the main body housing 6 even if it enters the wiring housing passage 9. Specifically, as shown in FIG. 1, the height position at the upper end portion of the lower surface (the upper surface of the insertion protrusion 84) of the wiring storage passage 9 of this example is the height position of the lower opening 13 a of the inner hole 13 of the inner cylinder 14. The potting resin 7 is filled so as to fill the housing housing space 21 (so as to reach the ceiling surface of the recessed step portion 16), and not only the Peltier element 4 but also the power supply wiring 8 is connected to the Peltier element. The portion extending from 4 to being introduced into the wiring storage passage 9 is also sealed, but the potting resin 7 remains in the wiring storage passage 9 in front of the upper end portion of the insertion protrusion 84, and the main body Leakage of the housing 6 to the outside is prevented. Furthermore, in this example, the wiring storage passage 9 in which the power supply wiring 8 is stored is filled with an adhesive 87, and the wiring storage passage 9 in which the power supply wiring 8 is stored by the adhesive 87 is completely formed. Since it is in the closed state, leakage of the potting resin 7 through the wiring housing passage 9 is reliably prevented.

  In addition, one form of leakage of the potting resin 7 is that the potting resin 7 leaks out of the main body housing 6 from between the resin leakage prevention material 12 and the upper surface of the heat radiating fin 5 and the lower surface of the main body housing 6. Conceivable. On the other hand, in this example, the upper and lower surfaces of the resin leakage prevention material 12 are each effectively formed by forming ring protrusions 93 and 94 over the entire circumference. Specifically, the ring protrusion 93 on the upper surface of the resin leakage prevention material 12 includes a hole edge protrusion 93 a extending over the upper opening edge of the inner hole 76, and a plate edge protrusion 93 b extending over the outer edge of the application plate closing portion 78. It consists of In addition, the ring protrusion 94 on the lower surface of the resin leakage prevention material 12 extends on the hole edge protrusion 94a extending over the lower opening edge of the inner hole 76, the outer edge of the application plate closing portion 78, and the outer edge of the wiring closing portion 79, respectively. It is comprised by the board edge protrusion 94b, 94c. The body housing 6 is placed and fixed on the heat radiating fin 5 by tightening the screw 20 as described above. By tightening the screw 20, the ring protrusion 94 on the lower surface of the resin leakage preventing material 12 is attached to the heat radiating fin 5. The ring protrusion 93 on the upper surface of the resin leakage prevention material 12 is elastically contacted with the lower surface of the main body housing 6. Specifically, in the ring ridge 93 on the upper surface of the resin leakage preventing material 12, the hole edge ridge 93a is elastically contacted with the ceiling surface of the concave step 16 of the main body housing 6, and the plate edge ridge 93b is It is elastically contacted with the lower surface of the bottom piece 55 of the application plate pressing member 29 inserted into the main body side recess 47 of the application plate storage portion 22. The potting resin 7 is injected around the Peltier element 4, that is, into the inner hole 76 of the ring-shaped resin leakage prevention material 12, and the ring protrusions 93 and 94 provided on the upper and lower surfaces of the resin leakage prevention material 12. Is sealed by being elastically contacted with the lower surface of the main body housing 6 (the ceiling surface of the recessed step portion 16) and the upper surface of the radiating fin 5 with high pressure. Is effectively prevented from leaking out of the main body housing 6.

  In addition, the electrostatic atomization unit 1a in the electrostatic atomizer 1 of this example of the said structure is assembled and manufactured as follows. First, the high voltage application plate 41 is disposed in the main body side recess 47 of the application plate housing portion 22 of the main body housing 6. Next, the atomizing electrode 30 formed by fixing the insulating heat transfer plate 40 to the main body portion 35 is connected to the electrode connecting portion 43 of the high voltage applying plate 41 and disposed in the main body housing 6. Next, the application plate pressing member 29 is inserted into the body-side recess 47 of the application plate storage unit 22, and the high voltage application plate 41 is stored in the application plate storage unit 22. Next, heat transfer grease 60 is applied to the cooling surface of the Peltier element 4 or the lower surface of the insulating heat transfer plate 40, and the Peltier element 4 is disposed in the housing housing space 21. At this time, the power supply wiring 8 is disposed in the main body side recess 72 of the wiring storage passage 9, and the connector 10 is fitted and disposed in the connector storage portion 11. Next, the resin leakage preventing material 12 is disposed in the recessed step portion 16 of the main body housing 6. At this time, the insertion protrusion 84 of the resin leakage prevention material 12 is inserted into the main body side recess 72 of the wiring storage passage 9, and the power supply wiring 8 is stored in the wiring storage passage 9. Next, the heat radiating sheet 61 is interposed between the cooling surface of the Peltier element 4 and the heat radiating fins 5, and the main body housing 6 is placed and fixed to the heat radiating fins 5 using washers 19 and screws 20. Next, the periphery of the Peltier element 4 is sealed with a potting resin 7. Next, the heat insulating cover 62 is disposed in the inner hole 13 of the main body housing 6. Finally, the counter electrode 31 is attached to the upper opening 13 b of the inner hole 13 of the main body housing 6. The electrostatic atomizing unit 1a of this example is assembled as described above.

It is sectional drawing of the electrostatic atomizer of the example of embodiment of this invention. It is a perspective view of the electrostatic atomization unit of the electrostatic atomizer same as the above. It is a disassembled perspective view of the electrostatic atomization unit same as the above. It is a cross-sectional perspective view of an electrostatic atomization unit same as the above. It is another cross-sectional perspective view of the electrostatic atomization unit same as the above. (A) is sectional drawing of a main body housing, (b) is sectional drawing of the electrode for atomization, (c) is sectional drawing of a Peltier device, (d) is sectional drawing of a resin leak prevention material. And (e) is a cross-sectional view of the application plate pressing member. It is explanatory drawing explaining injection | pouring of potting resin same as the above. It is a disassembled perspective view of the electrostatic atomizer of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrostatic atomizer 1a Electrostatic atomizer unit 2 High voltage generator 3 Atomizing electrode 4 Peltier element 5 Radiation fin 6 Main body housing 7 Potting resin 8 Power supply wiring 9 Wiring storage passage 10 Connector 11 Connector storage part 69 Wall outer surface 70 Vertical piece 71 Lip piece 80 Upper inclined part 90 Upper inclined path 93 Ring protrusion 94 Ring protrusion 11 Connector storage part 12 Resin leakage prevention material

Claims (3)

  A high voltage generator, an atomizing electrode that atomizes the water for atomization by the high voltage applied by the high voltage generating device, and the atomization electrode on the surface of the atomizing electrode by connecting its cooling side to the atomizing electrode An electrostatic atomizer that includes a Peltier element that obtains dew condensation water as water for use, and a radiation fin that is connected to the heat dissipation side of the Peltier element. The periphery of the Peltier element is sealed with potting resin, the power supply wiring composed of a self-holding metal wire is extended outward from the Peltier element, and the wiring storage passage with the power supply wiring arranged is the main body. The housing is formed so as to communicate with the inside and outside, and the power supply wiring is formed with an upper inclined portion that extends obliquely upward and outward, and the wiring storage passage is provided with an upper inclined passage that extends obliquely upward and outward, and the lower surface of the wiring storage passage Pel height position Electrostatic atomizer being characterized in that is positioned at the upper position than the E element.   A pair of vertical pieces project outwardly from the outer surface of the wall of the main body housing where the wiring storage passage opens, and lip pieces project from the projecting tips of the vertical pieces in the opposing direction of the vertical pieces. A connector housing part is formed by surrounding the outer surface, the vertical piece, and the lip piece, and a connector to which a power supply line is connected is attached to the tip of the power supply wiring, and the connector is fitted and housed in the connector housing part. The electrostatic atomizer according to claim 1.   The body housing is placed and fixed on the upper surface of the heat radiation fin, and an elastic ring-shaped resin leakage prevention material is interposed between the upper surface of the heat radiation fin and the lower surface of the body housing so as to surround the side of the Peltier element. In addition, ring ridges are formed on the lower surface and upper surface of the resin leakage prevention material over the entire circumference, and the ring ridges on the lower surface of the resin leakage prevention material are elastically contacted with the upper surface of the radiation fin, and The electrostatic atomizer according to claim 1 or 2, wherein the ring protrusion is elastically contacted with the lower surface of the main body housing.

Images