JP2012034886A - Deodorization device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorization device furthermore enhancing deodorization efficiency of a catalytic filter with a simple structure.SOLUTION: In this deodorization device, a sheath heater 82 is stored and held in a groove part 81G of a holding plate 81, one side of the sheath heater 82 is directly brought into contact with the catalytic filter 51, and the other side is directly brought into contact with the holding plate 81. The catalytic filter 51 is heated by heat transfer from the one side of the sheath heater 82, and is also heated by heat transfer of the holding plate 81 heat-transferred from the other side of the sheath heater 82, and heat radiation from both the sides of the sheath heater 82 is effectively utilized for the heating of the catalytic filter 51.

Description

  The present invention relates to a deodorizing apparatus that deodorizes air using a heat regeneration type catalyst filter.

  Conventionally, a deodorizing apparatus is used to deodorize and purify air in a closed space such as a room. In this deodorizing device, the indoor air introduced from the air suction port is passed through a deodorizing filter provided inside the device, and the deodorizing filter adsorbs and removes the odor component contained in the air, and then the odor component is removed. The indoor air is deodorized by releasing the deodorized air from the air outlet into the room.

  In particular, in recent years, a heat regeneration type catalyst filter is used for the deodorization filter, and the catalyst filter is heated with a heater, whereby the adsorbed odor component can be decomposed to regenerate the odor adsorption function.

  At this time, the heater unit for heating the catalyst filter (flat plate structure) includes a heater and a flat plate-like holding member (mesh fin) that holds the heater. The heater is closely fixed to the holding member, The heater and the side surface of the catalyst filter are brought into contact with each other and fixed (see, for example, Patent Document 1).

JP 2000-334031 A

  However, in such a conventional deodorizing apparatus, since the holding member with the heater closely fixed is also brought into contact with the catalyst filter, the air permeability of the catalyst filter is lowered by the holding member, and consequently the deodorizing efficiency of the catalyst filter is lowered. End up.

  Therefore, in view of the conventional situation, the present invention provides a deodorizing apparatus that can further improve the deodorizing efficiency of a catalyst filter with a simple structure.

  The deodorizing apparatus of the present invention includes a housing in which an air passage having an air suction port and an air outlet is formed, and a blower that circulates air in the air passage from the air suction port toward the air discharge port. A deodorizing unit having a catalyst filter that is disposed in the air flow path of the air passage and adsorbs and decomposes odor components contained in the air introduced from the air suction port, and the odor adsorbed by heating the catalyst filter And a heater unit that promotes decomposition of the component. The heater unit holds the heater body, and the catalyst filter is disposed so as to face the one side surface holding the heater body. A plate, and one side of the heater body is in direct contact with the catalyst filter, and the other side of the heater body is in direct contact with the holding plate. It is allowed to mainly characterized in that to dissipate the heat transmitted to the holding plate from the heater body by the holding plate.

  In the deodorizing apparatus configured as described above, the holding plate has a groove for holding the heater main body that is recessed along the shape of the heater main body, and the depth of the groove is the height of the heater main body. It is characterized by being formed smaller than this.

  In this case, the holding plate has a heater stopper that is disposed across the groove and fastens the heater main body, and the heater stopper has at least a step portion having a height corresponding to the thickness of the holding plate. The holding plate is provided with an engagement slit for inserting the low step portion, and the engagement plate is engaged with the low step portion. The high step portion is joined to the holding plate.

  In the deodorizing apparatus configured as described above, the holding plate has a hole for inserting a thermostat for detecting the temperature of the catalyst filter and adjusting the temperature of the heater unit, and is fixed in a state where the thermostat is inserted. And a portion of the holding plate facing the terminal portion of the thermostat bulges in a direction to support the terminal portion. It is formed.

  With the above configuration, according to the deodorizing apparatus of the present invention, one side of the holding plate is opposed to the catalyst filter, and one side of the heater body held by the holding plate is brought into direct contact with the catalyst filter. The other side of the heater body is brought into direct contact with the holding plate, and the heat transmitted from the heater body to the holding plate is radiated by the holding plate. Thus, the catalyst filter is heated by heat transfer from one side of the heater body, and is also heated by heat radiation of the holding plate transferred from the other side of the heater body. Thereby, since the heat radiation from both side surfaces of the heater body can be effectively used for heating the catalyst filter, the deodorizing efficiency of the catalyst filter can be further enhanced with a simple structure.

  Further, when the heater main body is housed and held in the groove for holding the heater main body recessed in the holding plate, the depth of the groove is smaller than the height of the heater main body. It protrudes from the groove by the difference between the height of the groove and the depth of the groove. Accordingly, when one side of the protruding side of the heater body is brought into contact with the catalyst filter, a gap portion having a predetermined width is provided between the catalyst filter and the holding plate. Thereby, the catalyst filter can ensure air permeability by the above-mentioned gap, and can further improve the deodorizing efficiency of the catalyst filter.

  Further, the heater stopper for fixing the heater body to the holding plate is formed by inserting the low step portion into the engagement slit of the holding plate in a state of being arranged over the groove portion and then joining the high step portion to the holding plate. The heater main body housed in the groove is fixed. Accordingly, the heater stopper can fasten and reliably fasten the heater main body to the holding plate by a simple process of engaging the low step portion with the engagement slit and simply joining the high step portion.

  Furthermore, when a thermostat for adjusting the temperature of the heater unit is attached to the holding plate, a portion of the holding plate facing the terminal portion of the thermostat is formed to bulge in a direction to support the terminal portion. As a result, when the thermostat mounting side of the holding plate is covered with a heat insulating material, even if the repulsive force when pressing and holding the heat insulating material acts on the terminal portion, the repulsive force is applied to the bulging portion of the holding plate. You can catch it. Therefore, it can suppress that a terminal part is damaged or bent by the repulsive force of the said heat insulating material, and a poor contact is induced.

FIG. 1 is a perspective view of a deodorizing apparatus according to an embodiment of the present invention as viewed obliquely from the front. FIG. 2 is a perspective view of the deodorizing apparatus shown in FIG. FIG. 3 is a side sectional view of the deodorizing apparatus shown in FIG. 4 is a side sectional view of a deodorizing unit provided in the deodorizing apparatus shown in FIG. FIG. 5 is an exploded perspective view of the deodorizing unit shown in FIG. FIG. 6 is a front view of the heater unit provided in the deodorizing unit of FIG. FIG. 7 is a cross-sectional view taken along line II in FIG. 8 is a rear view of the heater body of the heater unit shown in FIG. FIG. 9 is a rear perspective view of the heater unit shown in FIG. FIG. 10 is a perspective view showing one of the heat shield plates of the heater unit shown in FIG. FIG. 11 is an exploded perspective view of the heater unit shown in FIG. 12 is an enlarged cross-sectional view of a main part of the deodorizing unit shown in FIG. 13 is a front perspective view of the heater unit shown in FIG. FIG. 14 is an enlarged cross-sectional view of a main part taken along line II-II in FIG. 15 is an enlarged cross-sectional view of a main part taken along line III-III in FIG. 16 is an enlarged cross-sectional view of a main part taken along line IV-IV in FIG. FIG. 17 is a perspective view of a main part of a lead wire arranged at a V portion in FIG. 18 is a side view of the heater body shown in FIG. 19 is an enlarged cross-sectional view taken along line VI-VI in FIG. 20 is an enlarged cross-sectional view along the line VII-VII in FIG. FIG. 21 is an enlarged view of a portion VIII in FIG. FIG. 22 is an enlarged cross-sectional view showing the main part of the wiring portion of the lead wire in the heater unit shown in FIG. FIG. 23 is an enlarged cross-sectional view showing a portion where the lead wire of the heater body is taken out from the deodorizing unit shown in FIG. FIG. 24 is an exploded perspective view of a portion where the heater body is fixed to the holding plate, showing a first modification of the heater unit. 25 is a cross-sectional view of a main part of a portion that supports the terminal portion of the thermostat in the heater unit shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings, and FIGS. 1 to 23 show an embodiment of a deodorizing apparatus 1 according to the present invention. As shown in FIGS. 1 and 2, the deodorizing apparatus 1 has a rectangular parallelepiped casing 2 formed of a synthetic resin panel, and air introduced from an air suction port 21 provided on the back surface of the casing 2. The air is deodorized during discharge from the air outlet 22 provided on the upper surface.

  An operation panel 23 for operating the deodorizing apparatus 1 in various modes is provided on the upper surface of the housing 2 so as to be located on the side of the air outlet 22, and an openable / closable louver 24 is attached to the air outlet 22. ing. 1 and 2, the louver 24 is in an opened state.

  As shown in FIG. 3, an air passage 25 that guides the air introduced from the air inlet 21 to the air outlet 22 is formed inside the housing 2. The sirocco fan 3 is provided as a blower that circulates the air in the air passage 25 from the air suction port 21 toward the air discharge port 22. Of course, the sirocco fan 3 is preferable as the air blowing section in this case, but the air blowing section is not limited to this, and may have a function of circulating air, for example, a radial fan, an axial fan, or other air blowing fans. Also good. In FIG. 3, the louver 24 is in a closed state.

  A dust collection filter 4 is disposed on the backmost side of the air suction port 21 at the most upstream part of the air flow path of the air passage 25 (on the back side of the housing 2). The dust collection filter 4 and the sirocco fan 3 Between which the deodorizing unit 5 is disposed. An ozone generation unit 6 is disposed downstream of the sirocco fan 3.

  Then, the air introduced into the air passage 25 from the air suction port 21 with the operation of the sirocco fan 3 is first sent to the deodorizing unit 5 after dust and dust are removed by the dust collection filter 4. Thereafter, the air deodorized by the deodorizing unit 5 is cleaned with ozone gas generated by the downstream ozone generating unit 6 and discharged from the air outlet 22. Note that the ozone generation unit 6 is not necessarily required for configuring the deodorizing apparatus 1.

  In the present embodiment, the humidifying unit 7 for humidifying the air flowing through the air passage 25 is provided between the deodorizing unit 5 and the sirocco fan 3 in the air passage 25 in detail. Provided. Thus, by providing the humidification unit 7, it is comprised as the deodorizing apparatus 1 provided with the humidification function.

  As shown in FIGS. 4 and 5, the deodorizing unit 5 includes a catalyst filter 51 that adsorbs and decomposes odor components, a heater unit 8 that heats the catalyst filter 51 and promotes decomposition of the adsorbed odor components, A pair of breathable plate-shaped heat insulating materials 52 disposed on both sides so as to sandwich the catalyst filter 51 and the heater unit 8, and the catalyst filter 51, the heater unit 8, and the plate-shaped heat insulating material 52 are disposed so as to surround the outer periphery. And the pair of heat insulating plates 54 disposed so as to cover both sides of the plate-like heat insulating material 52 and the annular heat insulating material 53 in the ventilation direction. The heat shield plate 54 is formed of a metal punching plate whose air permeability is ensured by a large number of through holes.

  Therefore, when the air that has passed through the dust collection filter 4 is introduced into the deodorizing unit 5, the air passes through the deodorizing unit 5 shown in FIG. 3 from the right side to the left side in the drawing. Note that FIG. 4 in which the deodorizing unit 5 is enlarged is shown upside down with respect to the mounting state of FIG. 3, and the air introduced into the deodorizing unit 5 passes from the left side to the right side in FIG. It will be. That is, air passes through the left heat shield plate 54, the left plate heat insulator 52, the catalyst filter 51, the heater unit 8, the right plate heat insulator 52, and the right heat shield plate 54 in this order in FIG. It will be.

  As shown in FIG. 6, the heater unit 8 is generally configured by holding a sheath heater 82 as a heater body on a holding plate 81. As is generally known, the sheath heater 82 is configured by arranging a spiral heating element in the center of a metal pipe and filling a space between the heating element and the metal pipe with high-insulating powder having good heat conduction. It is.

  The holding plate 81 is formed of a metal punching plate in which air permeability is ensured by a large number of through holes, like the heat shield plate 54. As shown in FIG. 7, the holding plate 81 has a side wall 81 s whose peripheral part is bent in the back side direction (right side in the figure) by press working or the like, and is formed in a rectangular container shape as a whole. In the present embodiment, the side of the holding plate 81 where the catalyst filter 51 is disposed is described as the back side, and the opposite side is described as the front side.

  In the holding plate 81, the sheath heater 82 is held on the back side (inward side) surrounded by the side wall 81s, and as shown in FIG. 4, the catalyst filter 51 is placed on the inner side surrounded by the side wall 81s. Is stored. At this time, the catalyst filter 51 is disposed to face the back side surface (one side surface) of the holding plate 81.

  Then, as shown in FIG. 5, channel-like brackets 55 are screwed to the surrounding four side walls 81 s at substantially the center in the direction along each side of the holding plate 81. At this time, both end bent pieces 55a of each bracket 55 are arranged outward with respect to the holding plate 81, and as shown in FIG. 4, the heat shield plates 54 are screwed to the both end bent pieces 55a. It has come to be. Therefore, the deodorizing unit 5 assembled in this way is configured as a flat rectangular parallelepiped as a whole as shown in FIG.

  In addition, the deodorizing unit 5 allows the air flowing through the air passage 25 to pass through because the heat shield plates 54, the plate-like heat insulating material 52, and the holding plate 81 at both ends have air permeability.

  The catalyst filter 51 is formed by coating the surface of a honeycomb core board made of an aluminum alloy and having air permeability with a metal oxide such as manganese oxide or a noble metal catalyst such as platinum in a predetermined thickness. In addition, it is preferable to add activated carbon, various ceramic powders, etc. as an adsorbent. Furthermore, it is also preferable to add an antibacterial agent or a fungicide. And the catalyst filter 51 should just be a structure (heating regeneration type) which can reproduce | regenerate the adsorption | suction function of an odor component fundamentally by heating, and may be a catalyst filter which has another heating regeneration structure.

  As shown in FIG. 3, the humidification unit 7 has a structure including a humidification filter 71 disposed in the air circulation path of the air passage 3 and a humidification tray 72 that supplies moisture to the humidification filter 71. . Water is stored in the humidifying tray 72, and the stored water is supplied to the humidifying filter 71 through a water supply unit (not shown) so as to moisten the humidifying filter 71 as a whole. Then, when the air passes using the humidifying filter 71 as a moisture permeable film, the passing air is replenished with moisture and humidified. Control including ON / OFF of the humidification unit 7 can be performed by the operation panel 23 described above.

  The means for supplying the water from the humidifying tray 72 to the humidifying filter 71 may be a drop osmosis type, a capillary type or a rotary type, and the basic humidification provided with the humidifying filter 71 and the humidifying tray 72. In addition to the structure, other humidification structures such as a steam fan type, an ultrasonic type, or a vaporization type may be used.

  Further, the humidifying unit 7 is arranged at the lower part in the housing 2, and in this embodiment, the humidifying filter 71 is arranged at a position facing the suction (negative pressure) side of the sirocco fan 3 located at the lower part of the housing 2. . The humidifying tray 72 is installed below the humidifying filter 71 with a predetermined interval.

  Next, the heater unit 8 described above will be described in detail. As shown in FIG. 8, the sheath heater 82 is bent into a W shape, and both end portions 82a and 82b to which the lead wires 83 are connected are upward. It is supposed to be located. The sheath heater 82 shown in FIG. 8 is shown as viewed from the back side of the holding plate 81.

  That is, the sheath heater 82 bent in a W shape in this way has a W shape by forming two U-turn bent portions 82T on the lower side and one on the upper side. Thus, by setting the number of the bent portions 82T to be lower than the upper side, the weight of the heat generated by the sheath heater 82 is placed on the lower side, and the heat in the entire heater unit 8 where the heat tends to collect upwards. Is equalized.

  At this time, in order to dispose both end portions 82a and 82b upward and to place a weight of heat at the lower side, the sheath heater 82 does not necessarily need to be formed in a W shape, and the total number of the bent portions 82T. May be formed so that the number of bent portions 82T below the upper side is one. That is, if the number of the bent portions 82T is n (n: natural number), the number of the lower bent portions 82T may be n + 1 and the number of the upper bent portions 82T may be n. Of course, the total number of the bent portions 82T is (n + 1) + n = 2n + 1, which is an odd number.

  Then, at least the connection portion 82J of the lead wire 83 connected to the both end portions 82a and 82b is covered with the silicon tube 84. Further, a lead wire 87 connected to a thermal fuse 86 is connected in series via a connector C1 to a lead wire 83 connected to one end portion 82a of the sheath heater 82 (left side in FIG. 8). Even in this case, at least a portion including the thermal fuse 86 of the lead wire 87 is covered with the silicon tube 84. In this embodiment, it is preferable that the above-described lead wires 83 and 87 are heat-resistant digel wires. The sheath heater 82 is supplied with heating power from a wiring (not shown) connected to the connector C1.

  The silicon tube 84 is attached to serve both as an insulation and a seal, but is not necessarily limited to the silicon tube 84 and may be a tube having insulation, heat resistance, and flexibility.

  The lead wire 83 connected to the other end 82b of the sheath heater 82 (the right side in FIG. 8) and the other end side of the lead wire 87 of the thermal fuse 86 are connected to the thermostat 9 shown in FIG. 6 via connectors C2 and C3. Connected to.

  Thus, the connection portion 82J between the sheath heater 82 and the lead wire 83 is disposed at the upper end portion of the heater unit 8 because the sheath heater 82 is formed in a W shape. The part 82J is arranged on the upper portion of the housing 2 so as to be sufficiently spaced upward from the humidifying tray 72 of the humidifying unit 7.

  As described above, the connection portion 82J of the sheath heater 82 and the lead wire 83 is disposed on the upper portion of the housing 2 with respect to the humidifying unit 7 disposed on the lower portion of the housing 2, so that the deodorizing device 1 is likely to be accidentally brought down. Even when the deodorizing apparatus 1 is shaken greatly during movement or the like, even if the water stored in the humidifying tray 72 is scattered around, it is possible to prevent the scattered water from splashing on the connecting portion 82J.

  As shown in FIGS. 9 and 11, the holding plate 81 for holding the sheath heater 82 is provided with a groove 81G along the shape of the sheath heater 82 on the back side where the catalyst filter 51 is disposed. The sheath heater 82 is held in a state where the sheath heater 82 is housed.

  At this time, as shown in FIG. 12, the depth d1 of the groove 81G is formed to be smaller than the height h1 of the sheath heater 82 by a predetermined amount. As a result, when the catalyst filter 51 is disposed on the holding plate 81, one side of the sheath heater 82 is in direct contact with the catalyst filter 51, and the other side is in direct contact with the bottom surface of the groove 81G, that is, the holding plate 81. ing. A gap δ corresponding to the difference between the depth d1 of the groove 81G and the height h1 of the sheath heater 82 is provided between the holding plate 81 and the catalyst filter 51.

  Thus, by providing the gap δ between the holding plate 81 and the catalyst filter 51, the air permeability of the catalyst filter 51 is further enhanced. That is, although the holding plate 81 is formed of a punching plate, there is a closed surface between the perforations of the punching plate, and when the gap δ is not provided, the closed surface is the catalyst filter 51. The air permeability of the catalyst filter 51 decreases due to direct contact with the catalyst.

  In addition, in this way, one side of the sheath heater 82 is in direct contact with the catalyst filter 51 and the other side of the sheath heater 82 is in direct contact with the holding plate 81 (the bottom surface of the groove portion 81G). The heat is directly transferred from the air and also indirectly from the holding plate 81 through the gap δ (radiant heat). In this case, the holding plate 81 functions as a heat sink. At this time, since the temperature of the sheath heater 82 rises to about 140 to 150 degrees, the plate-like heat insulating material 52 having a heat resistance of 160 degrees or more is used.

  Further, as shown in FIG. 19, the heater main body of the sheath heater 82 has a flat surface 82c that is pressed by pressing or the like on the side that contacts the holding plate 81 (the bottom surface of the groove 81G). The sheath heater 82 is brought into contact with the holding plate 81 through the flat surface 82c, so that the heat transfer efficiency to the holding plate 81 is increased.

  As shown in FIG. 12, the groove portion 81G provided in the holding plate 81 is formed in a trapezoidal cross section extending outward (catalyst filter 51 side), but the sheath heater 82 accommodated in the groove portion 81G. 6 is fastened by a tongue piece 81P cut and raised from the holding plate 81, as shown in FIG. That is, when the sheath heater 82 is fitted into the groove portion 81G, the tongue piece 81P is in an upright state as shown in FIG. And after accommodating the sheath heater 82 in the groove part 81G, the tongue piece 81P is crimped and fixed to the outer periphery of the sheath heater 82, as shown in FIG. In addition, each width | variety of the tongue piece 81P is set suitably by the fixation site | part.

  14 shows the fixing structure of the heater body of the sheath heater 82, while the fixing of the lead wire 83 (see FIG. 8) covered with the silicon tube 84 is as shown in FIG. 15, as shown in FIG. . Furthermore, as shown in FIG. 6, the portion of the lead wire 87 to which the thermal fuse 86 is connected is covered with a heat insulating sheet 88 as shown in FIG. 17. Line 87 is fastened as shown in FIG.

  At this time, the tongue piece 81P for fixing the sheath heater 82 is crimped to the outer periphery of the sheath heater 82, thereby protruding outward by the thickness of the tongue piece 81P, and the contact property with the catalyst filter 51 is deteriorated. For this reason, as shown in FIGS. 18 and 20, a recess 82S is provided in the sheath heater 82 by pressing or the like at a location where the tongue piece 81P is arranged, and the tongue piece 81P is arranged in the recess 82. Thus, the tongue piece 81P is prevented from protruding from the sheath heater 82. Thereby, one side of the sheath heater 82 comes into contact with the catalyst filter 51 as a whole.

  As shown in FIG. 21, the recess 82S has a recess depth s that is at least the thickness of the tongue piece 81P (the thickness of the holding plate 81), and is about 0.6 mm in this embodiment. Further, both side portions of the recess 82S along the length direction of the sheath heater 82 are inclined with a predetermined angle θ, and in this embodiment, θ≈45 degrees. Further, the length L of the recess 82S may be a length corresponding to the width of the tongue piece 81P. However, in the present embodiment, the tongue having the maximum width among the respective tongue pieces 81P is used in order to reduce the press die. It is 15 mm suitable for the piece 81P.

  By the way, the groove portion 81G formed in a trapezoidal cross section is formed in a W shape along the shape of the sheath heater 82, and is approximately in the center in the length direction (vertical direction in FIG. 6) of the W shape groove portion 81G. The upper and lower straight portions 81Gs of the groove portion 81G are connected to each other by a bank portion 81B that is recessed in the horizontal direction with substantially the same cross-sectional shape as the groove portion 81G. At this time, when the groove 81G has a W shape as in the present embodiment, there are four vertical straight portions 81G in the left-right direction.

  By providing the bank portion 81B in this manner, the space S (see FIG. 12) between the holding plate 81 and the plate-like heat insulating material 52 becomes discontinuous in the vertical direction. As a result, the bank portion 81 </ b> B prevents hot air from rising upward from the lower part of the heater unit 8, and the temperature of the upper part of the heater unit 8 can be suppressed from becoming too high. Note that the bank portion 81B is not limited to one location, and a plurality of locations can be provided at appropriate intervals in the vertical direction.

  In the portion corresponding to the upper and lower straight portions 81Gs described above, the heat of the sheath heater 82 is transferred from the groove portion 81 by interposing a heat insulating material (not shown) between the outer surface of the groove portion 81G and the plate-like heat insulating material 52. Heat dissipation to the plate-like heat insulating material 52 side is suppressed, and the heat in the entire heater unit 8 can be equalized.

  Further, as shown in FIGS. 6 and 7, the central portion in the left-right direction of the bank portion 81B is formed wider than the other portions, and the front side surface of the bank portion 81B (the sheath heater 82) The mounting surface 81F of the thermostat 9 is the surface opposite to the holding surface. As shown in FIG. 7, the mounting portion 81F is formed with a mounting hole 81Fh into which the main body portion 91 of the thermostat 9 is inserted almost closely. In addition, a pair of mounting brackets 92 project from the both sides of the main body 91 of the thermostat 9 in a direction along the mounting portion 81F.

  When the thermostat 9 is attached, a part of the main body 91 is inserted into the attachment hole 81Fh from the front side of the holding plate 81, and then the attachment bracket 92 is fixed to the attachment portion 81F with screws 93.

  As shown in FIG. 6, the thermostat 9 is provided with a pair of connection terminals 94a and 94b protruding in a direction orthogonal to the facing direction of the mounting bracket 92, and the above-described sheath heater is provided on the connection terminals 94a and 94b. The connector C2 of the lead wire 83 connected to the end portion 82b of 82 and the connector C3 on the other end side of the lead wire 87 of the thermal fuse 86 are connected. In this manner, the temperature fuse 86 and the thermostat 9 are connected in series to the sheath heater 82, so that an abnormal temperature rise by the heater unit 8 can be prevented more reliably.

  Then, as shown in FIGS. 6, 9, and 13, both end portions 82 a and 82 b of the sheath heater 82 are taken out from a pair of openings 81 h formed on both upper side portions of the holding plate 81. When both end portions 82a and 82b of the sheath heater 82 are taken out from the opening portion 81h of the holding plate 81 to the front side, as shown in FIG. 11, the lead wire 83 and the lead wire 87 of the thermal fuse 86 are also together from the opening portion 81h. It is taken out to the front side. The lead wires 83 and 87 thus taken out from the opening 81h to the front side are wired along the front side surfaces of the groove portion 81G and the bank portion 81F as shown in FIG.

  At this time, the lead wires 83 and 87 are covered with the silicon tube 84 where the lead wires 83 and 87 are along the front side surface of the groove portion 81G or the bank portion 81F, but the surface temperature of the holding plate 81 is particularly high (for example, If there is a possibility of exceeding 180 degrees), it is preferable to interpose a heat insulating sheet 89 between the silicon tube 84 and the holding plate 81 as shown in FIG. In this case, polyimide or melamine is suitable as the material for the heat insulating sheet 89.

  Further, as shown in FIG. 6, when the lead wire 83 connected to the end portion 82a of the sheath heater 82 and the lead wire 87 of the thermal fuse 86 are connected via the connector C1, both the lead wires 83 and 87 are As shown in FIG. 6, it protrudes from the heater unit 8, and as shown in FIG. 23, it is pulled out from the deodorizing unit 5. For this reason, as shown in FIG. 10, the heat shield plate 54 is formed with outlets 54h for the lead wires 83 and 87.

  That is, as shown in FIG. 23, the end portion 82a of the sheath heater 82 is taken out from the opening 81h of the holding plate 81 to the front side, and the lead wire 83 connected to the end portion 82a of the sheath heater 82 is held together with the lead wire 87. From the front side of the plate 81, it is guided to the outlet 54h through the space between the outer periphery of the holding plate 81 and the annular heat insulating material 53. Then, both lead wires 83 and 87 are drawn outward from the outlet 54h.

  At this time, the lead wires 83 and 87 are pulled out substantially at right angles from the outlet 54h along the surface direction of the heat shield plate 54 depending on the wiring space, the arrangement direction of the wiring board, and the like. Since it is covered with the silicon tube 84, the lead wires 83 and 87 are not likely to be damaged.

  Here, the thermostat 9 is attached to a mounting portion 81F provided on the holding plate 81. Although the thermostat 9 is covered with the plate-like heat shield 52, the plate-like heat shield 52 has air permeability. Therefore, it does not have a watertight structure. For this reason, when water is applied to the deodorizing unit 5, the water passes through the plate-like heat insulating material 52 and reaches the thermostat 9.

  Therefore, as shown in FIGS. 6 and 7, the thermostat 9 is covered with a waterproof plate 10. The waterproof plate 10 is a foldable plate material such as a mica plate. Since the mica plate has heat resistance, even if the vicinity of the connectors C2 and C3 connected to the thermostat is ignited, the effect of preventing the spread of fire can be expected. The prevention plate 10 is formed in a rectangular shape, and almost half of the prevention plate 10 is used as a mounting portion 10F, and the other half is used as a covering portion 10C. At this time, as shown in FIG. 7, an opening 10 h through which the main body 91 of the thermostat 9 is inserted is formed in the mounting portion 10 </ b> F.

  And when attaching the waterproof board 10, mounting part 10F is mounted on the attachment bracket 92, and it fastens with the screw | thread 93, fixing the opening part 10h to the main-body part 91 of the thermostat 9. At this time, the cover portion 10C is arranged upward in an extended state, and after fixing the attachment portion 10F, the cover portion 10C is folded downward as shown in the figure to cover the outside of the thermostat 9 with a predetermined interval. It has come to be. Of course, the cover portion 10C has an area that can sufficiently cover the thermostat 9.

  Next, protection measures for the terminal portions 94a and 94b of the thermostat 9 will be described with reference to FIG. Here, FIG. 25 is a cross-sectional view of a main part of a portion supporting the thermostat terminal portions 94a and 94b in the heater unit 8 shown in FIG. In FIG. 25, the waterproof plate 10 is omitted for the sake of simplicity.

  The thermostat 9 arrangement side of the holding plate 81 is covered with a plate-like heat insulating material 52 (see FIG. 4). In this case, the plate-shaped heat insulating material 52 is pressed and held by the heat shield plate 54. For this reason, when the compressive force of the plate-shaped heat insulating material 52 pressed by the heat shield plate 54 acts directly on the thermostat 9 and its terminal portions 94a and 94b, the terminal portions 94a and 94b may be damaged.

  Here, in the present embodiment, as shown in FIG. 25, the holding plate 81 is opposed to the terminal portions 94a, 94b of the thermostat 9, that is, in this embodiment, the terminal portions 94a, 94b of the mounting portion 81F of the thermostat 9. A bulging portion 81Fs is formed by bulging a portion facing the terminal portion 94a, 94b in a direction to support the terminal portions 94a, 94b, that is, in a direction away from the catalyst filter 51.

  Therefore, in the deodorizing unit 5, when the attachment side of the thermostat 9 of the holding plate 81 is covered with the plate-like heat insulating material 52, the repulsive force when the heat insulating material 52 is pressed and held is applied to the terminal portions 94a and 94b of the thermostat 9. Even when it acts, the repulsive force can be received by the bulging portion 81Fs of the holding plate 81. Therefore, it is possible to suppress contact failure caused by the terminal portions 94a and 94b being damaged or bent by the repulsive force of the plate-like heat insulating material 52.

  With the configuration described above, according to the deodorizing apparatus 1 of the present embodiment, the heater unit 8 is held by holding the sheath heater 82 in the groove 81G that is recessed in the holding plate 81. The back side surface is opposed to the catalyst filter 51. Then, one side of the sheath heater 82 held by the holding plate 81 is brought into direct contact with the catalyst filter 51, and the other side of the sheath heater 82 is brought into direct contact with the holding plate 81, and transmitted from the sheath heater 82 to the holding plate 81. The holding heat is radiated by the holding plate 81.

  Thus, the catalyst filter 51 is heated by heat transfer from one side of the sheath heater 82 and is also heated by heat radiation of the holding plate 81 transferred from the other side of the sheath heater 82. Thereby, since the heat radiation from both sides of the sheath heater 82 can be effectively used for heating the catalyst filter, the deodorizing efficiency of the catalyst filter 51 can be further enhanced with a simple structure.

  Further, according to the deodorizing apparatus 1 of the present embodiment, when the sheath heater 82 is housed and held in the groove 81G that is recessed in the holding plate 81, the depth d1 of the groove 81G is as shown in FIG. The sheath heater 82 is smaller than the height h1 of the sheath heater 82, and the sheath heater 82 projects from the groove portion 81G by the difference between the height h1 and the depth d1 of the groove portion 81G. Therefore, when one side of the protruding side of the sheath heater 82 is brought into contact with the catalyst filter 51, a gap δ having a predetermined width is provided between the catalyst filter 51 and the holding plate 81. Thereby, the catalyst filter 51 can ensure air permeability by the gap δ, and the deodorizing efficiency of the catalyst filter 51 can be further enhanced.

  Moreover, according to the deodorizing apparatus 1 of this embodiment, when the attachment side of the thermostat 9 of the holding plate 81 is covered with the plate-like heat insulating material 52 in the deodorizing unit 5, the repulsion when the heat insulating material 52 is pressed and held. Even when a force acts on the terminal portions 94 a and 94 b of the thermostat 9, the repulsive force can be received by the bulging portion 81 Fs of the holding plate 81. Therefore, it is possible to suppress contact failure caused by the terminal portions 94a and 94b being damaged or bent by the repulsive force of the plate-like heat insulating material 52.

  FIG. 24 shows a modification of the above-described embodiment. As described above, in the heater unit 8 shown in the deodorizing apparatus 1 of the present embodiment, the sheath heater 82 is fixed by the tongue piece 81P. On the other hand, in this modification, the sheath heater 82 is fixed by the heater stopper 12 prepared separately from the holding plate 81.

  That is, as shown in the figure, the heater stopper 12 has a step 12L and a step 12H provided in steps with a step 12S having a height h2 substantially corresponding to the thickness of the holding plate 81. It has been. On the other hand, the holding plate 81 is provided with an engagement slit 81St for inserting the low step portion 12L into one side portion of the groove portion 81G. Then, with the above-described low step portion 12L engaged with the engagement slit 81St, the high step portion 12H is joined to the other side portion (indicated by x in the figure) of the groove portion 81G by spot welding or the like. It has become.

  Therefore, according to the present modification, the heater stopper 12 engages the low step portion 12L with the engagement slit 81St and simply spot welds the high step portion 12H. It can be fastened and reliably fastened.

  By the way, although the deodorizing apparatus of this invention was demonstrated taking the example to the said embodiment and its modification, various changes are possible in the range which is not restricted to these embodiments and does not deviate from the summary of this invention. For example, the present invention can be applied even to a deodorizing apparatus in which the humidifying unit 7 is not provided.

DESCRIPTION OF SYMBOLS 1 Deodorizing device 2 Housing 21 Air inlet 22 Air outlet 25 Air passage 3 Sirocco fan (blower part)
5 Deodorizing unit 51 Catalytic filter 8 Heater unit 81 Holding plate 81G Groove 81F Thermostat mounting part (part corresponding to terminal part)
81St Engagement slit 82 Sheath heater (heater body)
9 Thermostat 94a, 94b Terminal portion 10, 10A Waterproof plate 12 Heater stopper 12S Step portion 12L Low step portion 12H High step portion d1 Groove depth h1 Height of sheath heater (heater body)

Claims (4)

A housing in which an air passage having an air inlet and an air outlet is formed;
A blower that circulates air in the air passage from the air suction port toward the air discharge port;
A deodorizing unit having a catalyst filter that is disposed in the air flow path of the air passage and adsorbs and decomposes odor components contained in the air introduced from the air suction port;
In a deodorizing apparatus comprising: a heater unit that promotes decomposition of the odor component adsorbed by heating the catalyst filter;
The heater unit includes a holding plate in which the catalyst filter is disposed so as to face the one side surface holding the heater body while holding the heater body.
One side of the heater body is brought into direct contact with the catalyst filter, the other side of the heater body is brought into direct contact with the holding plate, and heat transferred from the heater body to the holding plate is radiated by the holding plate. A deodorizing device characterized by that.   The said holding plate has a groove part for heater main body holding recessed along the shape of the said heater main body, The depth of the said groove part was formed smaller than the height of the said heater main body, It is characterized by the above-mentioned. Item 2. A deodorizing apparatus according to Item 1. The holding plate has a heater stopper that is disposed across the groove and fastens the heater body,
The heater stopper is provided with a low step portion and a high step portion sandwiching at least a step portion having a height corresponding to the thickness of the holding plate, and an engagement for inserting the low step portion into the holding plate. The deodorizing apparatus according to claim 2, wherein a slit is provided, and the high step portion is joined to the holding plate in a state where the low step portion is engaged with the engagement slit.   The holding plate has a hole for inserting a thermostat for detecting the temperature of the catalyst filter and adjusting the temperature of the heater unit, and a fixing portion for fixing the thermostat in a state where the thermostat is inserted, on the side holding the heater body The portion of the other side opposite to that of the thermostat and the holding plate facing the terminal portion of the thermostat bulges in a direction to support the terminal portion. 3. The deodorizing apparatus according to any one of 3.