JPH0638731B2 - Heat generator for electric mosquito trap - Google Patents

Description

The present invention relates to a heat generating device for an electric mosquito trap.

(Prior art) Electric mosquito catchers include a fumigation type mat that heats a mosquito catching mat containing insecticidal components on a heating plate, and a wicking wicking liquid in a container that is sucked up by a wick and heated. There is a chemical liquid evaporation type that is designed to evaporate, and both are fumigated and evaporated by using a heating device that is electrically heated, but since temperature conditions are different between fumigation and evaporation. The heating device used in the former mat-fumigation-type electric mosquito trap has a flat plate configuration in which a heater is in contact with the back surface of the heat-receiving plate on which the mosquito-repelling mat is placed, and the latter is a chemical solution evaporation-type electric mosquito trap. The heat generating device of the container has a structure in which a suction core is inserted, and a core insertion hole having a size for forming a vaporization gap is formed around the suction core to heat from the periphery. , They must be manufactured separately Yes, there was a drawback that economic efficiency deteriorated.

In order to eliminate such a defect, the ring-shaped positive characteristics of the heat receiving plate on which the mat mounting flat surface for mounting the mosquito repellent mat to be fumigated by electric heating is formed on the back surface of the heat receiving plate so that electricity can be conducted between the insulating members. For electric mosquito catchers that fix the heat-generating assembly sandwiching the thermistor, and have core-insertion holes that penetrate the cores for sucking the drug solution and have a size for forming a vaporization gap around the cores Heating device (actual Kaihei 1-6878
No. 4) has been developed, and a mat fumigation type and a chemical vaporization type can be commonly used.

The positive temperature coefficient thermistor is formed in a flat plate shape having electrodes on both sides in the plate thickness direction, and the electrode surface side is surface-bonded to a vertical flat surface provided on a heat transfer member having a cylindrical portion. The device is known from Japanese Utility Model Publication No. 63-167696.

(Problems to be solved by the invention) However, a ring-shaped positive temperature coefficient thermistor is simply sandwiched between the upper and lower contact plates to use a heat-generating assembly, or the electrode surface side is vertically attached to a heat transfer body having a cylindrical portion. Even if surface-bonded to a flat surface, it is difficult to obtain the temperature conditions of a mat fumigation type that requires a relatively high temperature and a chemical vaporization type that requires a relatively low temperature. However, there is a problem to be solved in that it cannot be used in common with the liquid chemical evaporation type.

INDUSTRIAL APPLICABILITY The present invention can be used as a heat-generating device for a fumigation-type electric mosquito catcher, and can be used as a heat-generating device for a transpiration-type electric mosquito catcher without any trouble in temperature conditions, and is used as a heat-generating device for a fumigation-type electric mosquito catcher. If you do
The mosquito repellent mat can be fumigated on average and effectively at a relatively high temperature, and when it is used as a transpiration type electric mosquito trap, it is effective at a relatively low temperature without dew condensation. It is an object of the present invention to provide a heat generating device for an electric mosquito repellent device which can be vaporized at low cost.

(Means for Solving the Problems) In order to achieve the above object, the heat generating device for an electric mosquito catcher of the present invention has a heat receiving plate having a mat mounting plane on which a mosquito catching mat fumigated by electric heating is mounted. A heat-generating assembly that uses a plurality of positive temperature coefficient thermistors that can be energized between the insulating members is fixed on the back surface of the device, and a space for evaporation is formed around the chemical liquid suction core that is inserted. In a heat generating device for an electric mosquito trap having a core insertion hole penetrating in the center thereof, a plurality of positive temperature coefficient thermistors of the heat generating assembly, around the core insertion hole, both sides in the plate thickness direction as electrodes, and the electrode. Is used horizontally installed so that the surface facing the back surface of the heat receiving plate faces, and the temperature on the mat mounting plane corresponding to the position where the positive temperature coefficient thermistor is arranged is 140 ° C. ± 10 ° C.
Make sure that the temperature of the core insertion hole is 125 ° C ± 10 ° C.
This is a structure in which the size and mutual spacing are set and arranged.

(Example) Next, an example of the heat generating device for an electric mosquito catcher of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view showing a part of a heat generating device for an electric mosquito catcher according to a preferred embodiment of the present invention by breaking it, FIG. 2 is a sectional view of the same assembled state, and FIG. 3 is another embodiment. FIG. 4 is a sectional view of a heat generating device for an electric mosquito repellent according to FIG. 4, and FIG. 4 is a partially cutaway view showing a usage state.

In the figure, reference numeral 1 is a stainless steel heat receiving plate, which forms a mat mounting plane 11 on which a rectangular mosquito repellent mat which is fumigated by electric heating is mounted and which evaporates around the suction core on the back surface of the central portion. Core insertion hole 7 having a diameter for forming a cavity
The cylindrical body 17 in which is formed is squeezed and protruded, and the mat mounting surface 1
A holding frame 14 in which a holding claw 13 is hung on a pair of opposing edges
Is formed by bending, and a locking leg 16 in which the locking claw 15 is punched upright is bent.

Reference numeral 2 is an alumina porcelain insulating plate which is superposed on the lower surface of the heat receiving plate 1, and a cylindrical body insertion hole 21 into which the cylindrical body 17 of the heat receiving plate 1 is inserted is formed in the central portion.

Reference numeral 3 denotes a stainless steel upper contact plate disposed between the insulating plate 2 and the two positive temperature coefficient thermistors 4 described later. The spring terminals 31 and 32 are connected to each other by a conductive plate 33. The first connection terminal 34 for energization is vertically provided at the edge portion of the.

4 and 4 are resistance temperature characteristics C.I. P. (Curie point)
A 180 ° C. positive temperature coefficient thermistor having a thickness of 3 mm and a diameter of 8 mm. Both sides in the plate thickness direction are used as electrodes around the core insertion hole. Are installed horizontally so as to face the back surface of the heat receiving plate 1.

Reference numeral 5 denotes a stainless steel lower contact plate laid on the lower surface of the positive temperature coefficient thermistor 4, which connects the contact terminals 51 and 52 to each other with a conductive plate 53, and a second conductive plate 53 is provided at the edge of the conductive plate 53 for energization.
The connection terminal 54 is vertically provided.

Reference numeral 6 denotes an insulating box that is in contact with the lower surface of the heat receiving plate 1 through the insulating plate 2 and is held and fixed by the holding claws 13. The insulating box 6 is made of an insulating material made of alumina porcelain, and has a core insertion hole 61 in the center. And the accommodation recesses 62 and 63 for accommodating the positive temperature coefficient thermistors 4 and 4 are formed on the left and right sides thereof in a state of being connected by the shallow groove 64 for the upper contact plate and the shallow groove 65 for the lower contact plate. Through holes 66 for the first connecting terminals 34 of the upper contact plate 3 and through holes 67 for the second connecting terminals 54 of the lower contact plate 5 are provided at the bottoms of the shallow groove 64 for the contact plate and the deep groove 65 for the lower contact plate. Has been established.

The above-configured members are sequentially assembled from the lower member in the disassembled state of FIG. 1 to the state shown in the sectional view of FIG. That is, after the lower contact plate 5 is laid in the recess formed by the recesses 62 and 63 of the insulating box 6 and the deep groove 65 for the lower contact plate and the second connection terminal 54 is inserted into the through hole 67, the recessed recess 62 is received. ,
63, the PTC thermistors 4 and 4 are horizontally installed and housed so that both surfaces in the plate thickness direction are electrodes so that the surfaces to be the electrodes face the back surface of the heat receiving plate 1, and the upper contact plate 3 is superposed on the first plate. The connection terminal 34 is inserted into the through hole 66, and the upper contact plate 3
The insulating plate 2 is overlaid on the insulating box 6 and the insulating box 6 is closed to form a heating assembly. And this on the back of the heat receiving plate 1,
The tubular body 17 is housed in the holding frame 14 while being closely attached in a state of being inserted into the core insertion hole 61 of the insulating box 6, and is wrapped by the holding claws 13 of the heat receiving plate 1 to form a heat generating device.

The heating device configured as described above has a thickness of 3 mm, a diameter of 8 mm, and a resistance-temperature characteristic C.I. P. (Curie point) 180 ℃
In the positive temperature coefficient thermistors 4 and 4, the core insertion hole 61 and the accommodating recesses 62 and 63 have a boundary wall thickness of 3 to 4 mm, and both surfaces in the plate thickness direction are electrodes, and the surfaces to be the electrodes are the heat receiving plate 1 By installing horizontally so as to face the back surface and facing left and right, the temperature on the mat mounting plane 11 corresponding to the position where the positive temperature coefficient thermistors 4 and 4 are arranged becomes 140 ° C ± 10 ° C, and the core The temperature of the insertion hole 7 can be 125 ° C. ± 10 ° C.

When the mat heat receiving temperature is 130 ° C or lower, the insecticidal active ingredient impregnated in the mat has a low temperature and cannot be fumigated uniformly, and at 150 ° C or higher, the insecticidal active ingredient impregnated in the mat is Since it is high and fumigated excessively, it cannot be fumigated for a long time, which is not suitable for practical use.

Furthermore, if the temperature of the lead insertion hole of the liquid sucking lead is 115 ° C. or less, the temperature is too low and it becomes unsuitable for evaporation of the liquid,
Above 135 ℃, it is too high and the chemical solution is evaporated excessively.
It is not suitable for practical use.

In the above embodiment, the case where the cylindrical body 17 is squeezed and formed in the central portion of the heat receiving plate 1 has been described. However, as shown in FIG. 3, an independent aluminum inner cylinder 18 is used and the heat receiving plate 1 is used. If the structure is joined to the insulating box 6 so as to be caulked, the heat conduction resistance of the joint portion can be increased and the temperature of the core insertion hole can be lowered, so that the action and effect described below can be achieved. it can. In FIG. 3, the reference numerals of the respective parts are the same as those in the above-mentioned embodiment, and the individual explanations are omitted.

The heat generating device H for the electric mosquito catcher assembled in this way is
As shown in FIG. 4, it is used by incorporating it into an electric mosquito catcher consisting of an electric mosquito catcher main body A and a cover B.

The electric mosquito catcher body A of the electric mosquito catcher has a suction core a.
A support ring bottom integrally formed with a covered crown portion f in a folded state in cross section to form a ventilation window e on an outer peripheral portion of a cylindrical leg d adapted to accommodate a chemical liquid container c adapted to suck up the chemical liquid b. g is formed, and a screw hole i is formed in the center of the top plate h of the tubular leg d so as to be screwed into the mouth portion of the drug solution container c. The screw hole i is formed at the upper part of the top plate h and to the left and right of the screw hole i. The heating element mounting leg j is provided so as to project. The heat generating device H for an electric mosquito catcher is mounted horizontally by inserting and fixing the locking leg 16 in the heat generating body mounting leg t.

Further, the cover B, which is capped on the main body A of the electric mosquito trap and fixed with the screw k, has an exposure window n for exposing the heat receiving plate 1 of the heat generating device H for the electric mosquito trap on the canopy m. A protection bar p is installed above the structure.

And when it is used in the transpiration type electric mosquito catcher,
As shown in the figure, when the liquid medicine container c is set, the tip end of the suction core a is disposed in the core insertion hole 7, and electricity is applied,
It becomes possible to heat and evaporate the chemical liquid sucked up by the suction core a in the core insertion hole 7 portion, and on the heat receiving plate 1 of the heat generating device H for an electric mosquito trap without setting the chemical liquid container c. When the mosquito repellent mat M is placed on and energized, the mosquito repellent mat M can be heated and fumigated on the plane around the core insertion hole 7.

(Effects of the Invention) The heat generating device for an electric mosquito repellent of the present invention described above is configured such that the back surface of the heat receiving plate on which the mat mounting plane on which the mosquito repellent mat to be fumigated by electric heating is mounted is formed, and electricity is applied between the insulating members. A positive heating thermistor, which uses several positive temperature coefficient thermistors, is fixed, and a core insertion hole with a size that forms a vaporization gap around the chemical liquid suction core is inserted in the center. A plurality of positive temperature coefficient thermistors of the heat generating assembly, in which a plurality of positive temperature coefficient thermistors of the heat generating assembly are provided around the core insertion hole, with both sides in the plate thickness direction serving as electrodes, and the surface serving as the electrodes is the back surface of the heat receiving plate. The temperature on the mat mounting plane corresponding to the position where the positive temperature coefficient thermistor is placed is 140 ° C ± 10 ° C, and the temperature of the hole for core insertion is 125 ° C ± Size and mutual so that it becomes 10 ℃ Since the spaces are set and arranged, it is possible to easily secure the temperature condition and the heat dispersion balance between the mat fumigation type that requires a relatively high temperature and the chemical liquid vaporization type that requires a relatively low temperature. , Where a uniform temperature distribution is obtained,
It is possible to inexpensively provide a heat generating device for a fumigation type electric mosquito catcher and a heat generating device for an electric mosquito catcher that can be used in common as a heat generating device for an evaporation type electric mosquito catcher.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a part of a heat generating device for an electric mosquito catcher according to a preferred embodiment of the present invention by breaking it, FIG. 2 is a sectional view of the same assembled state, and FIG. 3 is another embodiment. FIG. 4 is a sectional view of a heat generating device for an electric mosquito repellent according to FIG. 4, and FIG. 4 is a partially cutaway view showing a usage state. 1 ... Heat receiving plate, 2 ... Insulating plate, 3 ... Top plate, 4 ... Positive characteristic thermistor, 5 ... Bottom plate, 6 ... Insulation box, 7 ... Core insertion hole, 11 ... Mat mounting Plane

Claims (1)

[Claims] 1. A back surface of a heat receiving plate having a mat mounting plane on which a mosquito removing mat fumigated by electric heating is mounted,
A core insertion hole of a size that secures a heating assembly that uses multiple positive temperature coefficient thermistors that can be energized between insulating members, and that has a transpiration gap formed around the chemical liquid absorption core In a heat generating device for an electric mosquito trap that has been penetrated in the central portion, a plurality of positive temperature coefficient thermistors of the heat generating assembly are provided around the core insertion hole, with both sides in the plate thickness direction as electrodes, and the surface that becomes the electrodes is Used horizontally installed so as to face the back surface of the heat receiving plate, the temperature on the mat mounting plane corresponding to the position where the positive temperature coefficient thermistor is arranged is 140 ° C ± 10 ° C,
Make sure that the temperature of the core insertion hole is 125 ° C ± 10 ° C.
A heating device for an electric mosquito catcher, characterized in that the size and the mutual spacing are set and arranged.