JP4819505B2 - Diffuser - Google Patents

Description

  The present invention relates to a diffuser that vaporizes and diffuses a drug.

  Conventionally, a diffuser has been used when vaporizing and releasing a liquid medicine contained in a medicine bottle (for example, Patent Document 1 to Patent Document 3).

  In this diffuser, the suction core of the drug container set in the diffuser body is heated by a heater, whereby the drug sucked up by the suction core is heated to increase the evaporation efficiency.

The diffuser is connected in parallel to the heater with a neon lamp and a light emitting diode that emit light when power is supplied, and the neon lamp and the light emitting diode are turned on when the heater is energized.
JP-A-2-265425 JP-A-8-196185 Japanese Patent Laid-Open No. 9-074972

  However, in such a diffuser, when the heater is turned off, the transpiration efficiency of the medicine is lowered, but the light emitting diode is maintained in the lighting state.

  Then, when the diffuser is an aroma device, there is a possibility that the user may think that the aroma effect is reduced even though the aromatic liquid remains in the medicine container.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a diffuser capable of interlocking the operation of a heater and the light emission of a light emitter.

In the diffusion device of the present invention to solve the above problems, a heater for heating the wicking cores of the set container body diffuser body, in diffuser that includes a light emitter that emits light when energized The heater and the light emitter are connected in series, and the Zener diode is connected in parallel to the light emitter so that a reverse voltage is applied to the Zener diode to form an upper limit voltage regulation circuit, and one of the AC power supplies is The bridge is connected to one terminal of the heater, and a bridge rectifier circuit is formed between the other terminal of the heater and the other of the AC power supply, and the light emitter is connected to the output of the bridge rectifier circuit, while the bridge The rectifier circuit is composed of a diode and the Zener diode to constitute the upper limit voltage regulating circuit .

  That is, the heater that heats the suction core and the light emitter that emits light when energized are connected in series. For this reason, when the heater is turned off during use, the energization circuit to the light emitter is cut off and the light emitter is turned off.

  At this time, the electrical resistance of the heater increases as the temperature increases, while the electrical resistance decreases when the temperature decreases. By repeatedly increasing / decreasing the electrical resistance, the heat generation temperature is made constant. For this reason, when the light emitter is simply connected in series with the heater, the current flowing through the light emitter varies depending on the electrical resistance of the heater.

  However, in the present invention, a zener diode is connected in parallel to the light emitter, and an upper voltage regulation circuit is configured by applying a reverse voltage to the zener diode.

  For this reason, when the electric resistance of the heater decreases and the voltage applied to the Zener diode reaches the Zener voltage, a reverse current flows through the Zener diode, so that the applied voltage of the light emitter becomes constant. Kept.

  At this time, since a reverse current can flow through the Zener diode, the energization amount of the heater can be maintained.

Further , a bridge rectifier circuit is formed downstream of the heater, and an output rectified by the bridge rectifier circuit is applied to the light emitter. For this reason, it becomes possible to comprise this light-emitting body with the light emitting diode which has polarity.

  The bridge rectifier circuit is composed of a diode and the Zener diode, thereby configuring the upper limit voltage regulating circuit.

  For this reason, the upper limit value of the output voltage from the bridge rectifier circuit is limited by the upper limit voltage regulation circuit.

Or In the diffusion device of the present invention, as described, by serially connecting the light emitter that emits light when energized and heater for heating the wicking core, when the heater is cut, in use, the The energization circuit to the light emitter can be cut off.

  For this reason, when the heater is turned off and the transpiration efficiency from the suction core decreases, it is possible to notify that the transpiration efficiency has decreased by turning off the light emitter.

  Therefore, compared with the conventional case in which the light emitting state of the light emitter is maintained even when the heater is turned off, for example, the user feels that the fragrance effect has been reduced even though the aromatic liquid remains in the container body. Can do.

  On the other hand, the electrical resistance of the heater increases and decreases as the temperature rises and falls, and the current flowing through the heater fluctuates. At this time, a Zener diode is connected in parallel to the light emitter to form an upper limit voltage regulation circuit, and the voltage applied to the light emitter is kept below a certain voltage.

  For this reason, compared with the case where the electric current which flows into the said light-emitting body changes according to the electric current which flows through the said heater, and the brightness | luminance of a light-emitting body changes with this current change, the brightness | luminance of a light-emitting body can be stabilized. .

Further, it is possible by this to form a bridge rectifier circuit downstream of the pre-Symbol heater, applies the output rectified by the said bridge rectifier circuit to the light emitter. For this reason, this light-emitting body can be comprised with the light emitting diode with polarity, and reduction of power consumption and lifetime can be aimed at.

  The bridge rectifier circuit is composed of a diode and the Zener diode, thereby configuring the upper limit voltage regulating circuit.

  For this reason, the upper limit value of the output voltage from the bridge rectifier circuit can be limited by the upper limit voltage regulating circuit.

  Further, the bridge rectifier circuit and the upper limit voltage regulating circuit can be provided without increasing the number of components such as a diode as compared with the case where the upper limit voltage regulating circuit is formed in addition to the bridge rectifier circuit that rectifies an AC power supply. And can be established.

  Moreover, it is not necessary to use a large-capacity Zener diode, and the heat generated by the Zener diode can be reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing an aroma device 1 as a diffuser according to the present embodiment. The fragrance device 1 is a device for vaporizing and discharging a liquid medicine in a medicine bottle 3 as a container set in the fragrance body 2, and the fragrance device 1 is used in a toilet or a living space. It is.

  As shown in FIG. 2, the fragrance body 2 as a diffuser body of the fragrance 1 includes a rear cover 11 forming a rear wall surface, a front cover 12 attached to the front side of the rear cover 11, and the front The internal structure 13 is arranged between the cover 12 and the rear cover 11.

  The rear cover 11 is formed in a container shape whose front is opened by a colored opaque resin that does not transmit light, and a notch 21 is provided in the lower part thereof. The upper part of the rear cover 11 is formed in an arc shape in cross section, and a volatilization hole 22 for volatilizing the drug is opened in the center.

  Further, a pair of locking pins 31, 31 extending inward are provided on the front side of the volatilization hole 22 at the upper part of the rear cover 11, and the side surface of the rear cover 11 is provided in the front-rear direction. Extending upper ribs 32 and 32 and lower ribs 33 and 33 as support ribs are provided at the left and right portions. At the front ends of the lower ribs 33, 33, rib insertion holes 34, 34 are provided so that fixing tapping screws 35, 35 can be inserted.

  As shown in FIG. 1, air inlets 42, 42 including a plurality of slits 41,... Are formed on the left and right sides of the rear cover 11. It is comprised so that external air can be taken in in the aroma body 2. The slits 41,... Of the air intakes 42, 42 are provided in the upper part of the rear cover 11 formed in an arc shape in cross section, and compared with the case in which the slits 41 are provided in the lower side surface of the rear cover 11. And it is comprised so that it may be arrange | positioned near the center of the said fragrance body 2.

  As shown in FIG. 2, a slide plate 45 is supported on the rear cover 11 via a shaft portion 44, and the slide plate 45 is configured to be rotatable about the shaft portion 44. Yes. An operation knob 46 protrudes from the slide plate 45, and the operation knob 46 extends to the outside through an insertion hole 47 provided in the rear cover 11.

  Thus, by operating the operation knob 46 and rotating the slide plate 45 about the shaft portion 44, the slide plate 45 forms the slits 41, 42 constituting the air intake ports 42, 42,. -The opening area can be varied.

  A pair of rectangular holes 71 are provided in the lower part of the rear cover 11, and the outlet plugs 72, 72 provided in the internal structure 13 are connected to the rear cover 11 via the rectangular holes 71, 71. It is configured to extend backward. A locking claw 73 projects upward from the center of the lower edge of the rear cover 11.

  The internal structure 13 is made of a translucent resin that transmits light and has a central plate 81 provided at the center. On the left and right side edge portions of the central plate 81, step surfaces 83 and 83 are formed as support pieces that are one step higher than the general portion 82, and the central plate 81 is reinforced.

  The central plate 81 is formed with a circular bulging portion 91 that bulges upward. The circular bulging portion 91 is configured such that the neck of the drug bottle 3 is inserted from below. Yes. At the rear edge of the central plate 81, a sandwiching plate 92 is provided that hangs downward, and a gap 84, 84 is provided between the sandwiching plate 92 and the stepped surface 83 formed on the central plate 81. Is formed. A concave portion 93 is formed at the center of the lower edge of the sandwiching plate 92, and the concave portion 93 is configured to engage the locking claw 73 provided on the rear cover 11.

  The holding plate 92 is configured to face the lower portion of the front cover 12, and the holding plate 92 is disposed between the front cover 12 and the medicine bottle as shown in FIG. The three bottle main bodies 95 can be sandwiched from the front and rear together with the front cover 12. As a result, the drug bottle 3 held between the holding plate 92 and the front cover 12 is held in a state where the neck portion is inserted into the circular bulging portion 91, as shown in FIGS. 3 and 4. Thus, the suction core 96 extending from the neck portion is configured to extend upward through the support hole 97 provided in the circular bulge portion 91. Thereby, as shown in FIG. 1, a lower-opening container holding space 98 in which the medicine bottle 3 is set from below is formed in the lower part of the aroma body 2.

  As shown in FIGS. 3 and 4, a rectangular column 101 is erected along the circular bulging portion 91 at the rear edge of the central plate 81, and the upper end of the column 101 is A heater 102 is provided. The heater 102 is provided via the support column 101, and the heater 102 is configured to be disposed directly above the support hole 97 provided in the circular bulging portion 91. The heater 102 has a heating portion 104 formed in a cylindrical shape, and is disposed at a position surrounding the outer peripheral portion of the suction core 96 extending from the drug bottle 3. As a result, the medicine sucked up by the suction core 96 is heated by the cylindrical portion 104 of the heater 102 to accelerate the evaporation of the medicine, and the evaporated medicine is volatilized to the outside through the volatilization hole 22. It is configured to be able to.

  The heater 102 is provided with electrodes 111 and 111, and the electrodes 111 and 111 are connected to the control board 113 through connection lines 112 and 112. The control board 113 is fixed along the back surface of the clamping plate 92, and the outlet plugs 72, 72 to be plugged into a household AC outlet are provided at the lower part of the control board 113.

  The control board 113 is connected to a left light-emitting diode 121 and a right light-emitting diode 122 as light emitters that emit light from a power source supplied from the AC outlet. The light-emitting diodes 121 and 122 are connected to the circular swelling. The ribs 123 and 123 provided on both sides of the protruding portion 91 are fixed in a locked state. Accordingly, the light emitting diodes 121 and 122 are configured to be disposed closer to the front cover 12 than the support column 101 and the heater 102.

  A sub-board 131 is provided on the side of the circular bulging portion 91, and the sub-board 131 is connected to the control board 113. The sub-board 131 is provided with a switch 132, and an operation portion 133 provided on the switch 132 is connected to the rear cover via a switch hole 134 provided on the rear cover 11 (see FIG. 2). It is comprised so that it may protrude in the 11 side part.

  Cylindrical portions 141 and 141 extending in the vertical direction are formed at the ends of the ribs 123 and 123 provided in the circular bulging portion 91, and the cylindrical portions 141 and 141 are formed on the stepped surfaces 83 and 141. 83 is provided so as to project through the step surfaces 83 and 83 and open downward. Accordingly, the fixing tapping screws 35 and 35 inserted from below the stepped surface 83 can be screwed into the cylindrical portions 141 and 141.

  As shown in FIGS. 2 and 5, the front cover 12 is formed of a translucent resin having translucency that transmits light in the same manner as the internal structure 13. It is formed in a vertically long oval shape. The front surface of the front cover 12 is a flat surface that is gently curved and has no unevenness, and a ridge 151 is formed on the entire periphery of the front cover 12. Thereby, the inner side of this protruding item | line part 151 comprises the sticking surface 152 which can stick sticky articles, such as a film.

  Upper support pieces 161 and 161 extending rearward are provided on the upper portion of the front cover 12, and locking holes 162 and 162 are provided on both upper support pieces 161 and 161. The locking holes 162 and 162 of the upper support pieces 161 and 161 are configured to be locked with the locking pins 31 and 31 protruding from the rear cover 11 being inserted ( 2), the upper portion of the front cover 12 can be fixed to the rear cover 11.

  A projecting portion 171 projects from the center of the lower portion of the front cover 12, and the projecting portion 171 supports a convex portion 172 provided on the bottle body 95 of the medicine bottle 3 from below (FIG. 3). Reference) is configured to prevent inadvertent detachment of the drug bottle 3. As shown in FIG. 5, extending pieces 173 and 173 extending toward the rear cover 11 are provided on both sides of the projecting portion 171, and both extending pieces 173 and 173 are The cross section is formed in an L shape. The extended pieces 173 and 173 are provided with circular extended piece insertion holes 174 and 174, respectively, so that the fixing tapping screws 35 and 35 can be inserted.

  As shown in FIG. 6, the extended pieces 173 and 173 provided on the front cover 12 can be supported on the lower ribs 33 and 33 provided on the rear cover 11. So that the stepped surfaces 83, 83 provided in the internal structure 13 can be supported on the extended pieces 173, 173 provided in the front cover 12. It is configured.

  Accordingly, the rib insertion insertion holes 34, 34 provided in the lower ribs 33, 33 of the rear cover 11 and the extension piece insertion holes 174 provided in the extension pieces 173, 173 of the front cover 12. , 174 are inserted into cylindrical portions 141, 141 projecting from the stepped surfaces 83, 83 of the internal structure 13, and the lower ribs 33, 174 of the rear cover 11 are inserted. The rear cover 11, the internal structure 13, and the front cover in a state where the extending pieces 173, 173 of the front cover 12 are sandwiched between the step 33 and the step surfaces 83, 83 of the internal structure 13. 12 can be fixed.

  In this fixed state, the fixing position 191 for fixing the rear cover 11, the front cover 12 and the internal structure 13 is below the light emitting diodes 121 and 122, and the light emitting diodes 121 and 122 emit light. It is set to the rear cover 11 side from the surface. Further, the space between the light emitting diodes 121 and 122 provided in the internal structure 13 and the front cover 12 is configured to be an empty space 192.

  FIG. 7 is a circuit diagram showing an electronic circuit configured on the control board 113 and the sub board 131. One of the outlet plugs 72a connected to the AC outlet is connected to the heater 102 via an input resistor 301. The electrode 111a which comprises one terminal of is connected.

  Here, the heater 102 is composed of a PTC thermistor (Positive Temperature Coefficient Thermistor), and the PTC thermistor has a Curie temperature (resistance sudden change temperature) at which the electrical resistance increases rapidly from a predetermined temperature. have.

  FIG. 8 is a diagram showing the relationship between the surface temperature 401 of the heater 102 and the current 402 flowing through the heater 102. The surface temperature of the heater 102 rises to the Curie temperature after energization of the heater 102 is started. Then, the electric current of the heater 102 is abruptly increased so that the inflow current is limited and the rise in the surface temperature is suppressed. Thereby, the heater 102 is configured such that the surface temperature becomes constant without depending on the external temperature by repeatedly increasing and decreasing the electric resistance.

  As shown in FIG. 7, a bridge rectifier circuit 311 is formed between the electrode 111b constituting the other terminal of the heater 102 and the other outlet plug 72b connected to the AC outlet. The AC power supplied from the AC outlet is configured to be full-wave rectified by the bridge rectifier circuit 311.

  The right light emitting diode 122 and the bypass resistor 323 are connected to the + output 321 of the bridge rectifier circuit 311 via a limiting resistor 322, and the bypass resistor 323 is connected to the sub-board via connectors 324 and 325. 131 is connected to the “L” terminal 326 of the switch 132.

  The right light emitting diode 122 is connected to the left light emitting diode 121 provided on the sub-board 131 via the connectors 324 and 325, and the left light emitting diode 121 is connected to the common terminal 331 of the switch 132. At the same time, it is connected to a back light emitting diode 332 provided on the back surface of the control board 113 through the connectors 324 and 325. The back light emitting diode 332 is connected to the negative output 333 of the bridge rectifier circuit 311.

  Thus, when the switch 132 is switched to the “H” side, the limiting resistor 322, the right light emitting diode 122, and the left are between the + output 321 and the − output 333 of the bridge rectifier circuit 311. The light emitting diode 121 and the back light emitting diode 332 are configured to be connected in series, and each of the light emitting diodes 121, 122, and 332 is lit by a direct current supplied from the bridge rectifier circuit 311. Has been. At this time, one of the AC power supplies is configured to be input to the bridge rectifier circuit 311 via the heater 102, and the heater 102 and the light emitting diodes 121, 122, 332 are connected to the bridge rectifier circuit 311. They are connected in series via a rectifier circuit 311.

  Further, when the switch 132 is switched to the “L” side, the bypass resistor 323 is connected in parallel to the right light emitting diode 122 and the left light emitting diode 121 connected in series. When the current from the bridge rectifier circuit 311 flows through the bypass resistor 323 side, the right light emitting diode 122 and the left light emitting diode 121 are turned off, and only the back light emitting diode 332 is turned on. Yes.

  The bridge rectifier circuit 311 is configured by a diode bridge, and is configured to supply DC power by full-wave rectifying AC power.

  More specifically, the anode of the first rectifier diode 341 is connected to the other electrode 111 b of the heater 102, and the cathode of the first rectifier diode 341 constitutes the positive output 321. The cathode of the first Zener diode 342 is connected to the other electrode 111 b of the heater 102, and the anode of the first Zener diode 342 constitutes the negative output 333.

  The other outlet plug 72 b connected to the AC outlet is connected to the anode of the second rectifier diode 351, and the cathode of the second rectifier diode 351 is connected to the + output 321. The cathode plug of the second Zener diode 352 is connected to the other outlet plug 72b, and the anode of the second Zener diode 352 is connected to the negative output 333.

  In the state where the switch 132 is switched to the “H” side, when the one outlet plug 72a is positive, the input resistor 301, the heater 102, and the first rectifier are supplied from the one outlet plug 72a. The diode 341, the limiting resistor 322, the light emitting diodes 121, 122, 332, and the second Zener diode 352 are configured to drop in order, and the other electrode 111 b of the heater 102 and the −output are configured. The voltage generated at 333 is applied as a reverse bias to the first Zener diode 342. The first Zener diode 342 is connected in parallel to a first series circuit in which the first rectifier diode 341, the limiting resistor 322, and the light emitting diodes 121, 122, and 332 are connected in series. An upper limit voltage regulation circuit 353 that regulates the upper limit value of the voltage applied to the first series circuit by the Zener voltage by the first Zener diode 342 is formed.

  When the other outlet plug 72b is positive, the second rectifier diode 351, the limiting resistor 322, the light emitting diodes 121, 122, 332, and the first Zener diode 342 are connected to the other outlet plug 72b. And the heater 102 and the input resistor 301 in this order, and the voltage generated in the other outlet plug 72a and the -output 333 is reverse-biased with respect to the second Zener diode 352. It is comprised so that it may be applied as. The second Zener diode 352 is connected in parallel to a second series circuit in which the second rectifier diode 351, the limiting resistor 322, and the light emitting diodes 121, 122, and 332 are connected in series. The upper limit voltage regulation circuit 353 that regulates the upper limit value of the voltage applied to the second series circuit by the Zener voltage by the second Zener diode 352 is formed.

  The zener voltages of both the zener diodes 342 and 352 are set to the same value, and this zener voltage is set to a voltage that can turn on the light emitting diodes 121, 122, and 332 simultaneously.

  In the present embodiment having the above configuration, the heater 102 that heats the suction core 96 extending from the medicine bottle 3 and the light emitting diodes 121, 122, and 332 that emit light when energized are connected in series. For this reason, when the heater 102 is cut off during use, the energization circuit to the light emitting diodes 121, 122, and 332 can be cut off.

  Therefore, when the heater 102 is turned off and the evaporating efficiency from the suction core 96 is lowered, the light emitting diodes 121, 122, and 332 are extinguished to notify that the evaporating efficiency is lowered. Can do.

  Therefore, compared with the conventional case where the light emission state of the light emitting diodes 121, 122, and 332 continues even when the heater 102 is turned off, the fragrance effect is reduced although the fragrance liquid remains in the medicine bottle 3. It is possible to eliminate the user's uncomfortable feeling.

  The heater 102 is configured such that the electrical resistance increases as the temperature rises, while the electrical resistance decreases when the temperature decreases. By repeatedly increasing and decreasing the electrical resistance, the heater 102 depends on the external temperature. And the surface temperature is constant. Therefore, when the heater 102 and the light emitting diodes 121, 122, 332 are simply connected in series, the current flowing through the light emitting diodes 121, 122, 332 varies depending on the electrical resistance of the heater 102. It will be.

  However, in the present embodiment, the first and second Zener diodes 342 and 352 are connected in parallel to the light emitting diodes 121, 122, and 332, and a reverse voltage is applied to the Zener diodes 342 and 352. By configuring in such a manner, the upper limit voltage regulation circuit 353 is configured.

  For this reason, when the electric resistance of the heater 102 decreases and the voltage applied to the Zener diodes 342 and 352 reaches the Zener voltage, a reverse current flows through the Zener diodes 342 and 352. The applied voltages of the light emitting diodes 121, 122, and 332 are kept constant.

  For this reason, the current flowing through each of the light emitting diodes 121, 122, and 332 changes according to the current flowing through the heater 102, and the brightness of each of the light emitting diodes 121, 122, and 332 changes with the change in current. Thus, the luminance of the light emitting diodes 121, 122, and 332 can be stabilized.

  At this time, since a reverse current can flow through each of the Zener diodes 342 and 352, the energization amount of the heater 102 can be maintained.

  A bridge rectifier circuit 311 is formed between the other electrode 111b of the heater 102 and the other outlet plug 72b connected to the AC outlet, and a direct current which has been full-wave rectified by the bridge rectifier circuit 311. Is applied to each of the light emitting diodes 121, 122, 332.

  For this reason, the light emitter of the fragrance device 1 can be composed of the light emitting diodes 121, 122, and 332 having a polarity, so that power consumption can be reduced and the life can be extended.

  The bridge rectifier circuit 311 includes the rectifier diodes 341 and 351 and the Zener diodes 342 and 352, and the bridge rectifier circuit 311 to which an output rectified by the bridge rectifier circuit 311 is applied as a reverse bias. The upper limit voltage regulating circuit 353 can be formed by configuring each of the Zener diodes 342 and 352 with the above-described Zener diode 342. As a result, the upper limit value of the output voltage from the bridge rectifier circuit 311 can be limited by the upper limit voltage regulation circuit 353.

  Furthermore, the bridge rectifier circuit 311 and the upper limit voltage regulating circuit are not increased without increasing the number of parts as compared with the case where the upper limit voltage regulating circuit 353 is formed in addition to the bridge rectifying circuit 311 that rectifies an AC power supply. 353 can be established.

  Further, by providing the Zener diodes 342 and 352 in the bridge rectifier circuit 311, half-wave rectified output can be distributed and applied to the Zener diodes 342 and 352. Therefore, a Zener diode is provided at the output of the bridge rectifier circuit 311, and the amount of heat generated at each of the Zener diodes 342 and 352 is suppressed as compared with the case where the full-wave rectified output is applied to one Zener diode. Can do.

  Further, each of the Zener diodes 342 and 352 can be a small and inexpensive low-capacitance type, and the circuit can be simplified.

  Although the fragrance device 1 has been described in the present embodiment, it can be used for an insecticide that diffuses an insecticide, an insecticide that diffuses an insecticide, a deodorizer that diffuses a deodorant, and the like.

It is a perspective view which shows one embodiment of this invention. It is a disassembled perspective view of the same embodiment. It is a side view which shows the internal structure of the embodiment. It is a top view which shows the internal structure of the embodiment. It is a perspective view which shows the front cover of the embodiment. It is sectional drawing of the principal part of the embodiment. It is a circuit diagram which shows the electric circuit of the embodiment. It is explanatory drawing which shows operation | movement of the heater of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aroma device 2 Aroma device body 3 Medicine bottle 96 Suction core 102 Heater 111 Electrode 121 Left light emitting diode 122 Right light emitting diode 311 Bridge rectifier circuit 332 Back light emitting diode 342 First Zener diode 352 Second Zener diode 353 Upper limit regulation circuit

Claims (1)

In a diffuser provided with a heater that heats the suction core of the container set in the diffuser body, and a light emitter that emits light when energized,
The heater and the light emitter are connected in series, and the upper limit voltage regulation circuit is configured by connecting the Zener diode in parallel to the light emitter so that a reverse voltage is applied to the Zener diode ,
One side of the AC power source is connected to one terminal of the heater, and a bridge rectifier circuit is formed between the other terminal of the heater and the other side of the AC power source, and the light emitter is connected to the output of the bridge rectifier circuit. While connecting
The diffuser, wherein the bridge rectifier circuit is constituted by a diode and the Zener diode to constitute the upper limit voltage regulating circuit .

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