JP2544309Y2 - Heater - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater for heating and evaporating a drug solution in a drug solution container, and more particularly to a heating and evaporating device for killing insects such as mosquitoes by heating and evaporating a vaporizing agent such as an insecticide solution. It is suitable for use.

[0002]

2. Description of the Related Art Some heaters use a positive temperature coefficient thermistor as a heating means. To describe an example of the structure, a rectangular insulating case is provided on the back of a heat sink via an insulating sheet, and a tablet-shaped positive temperature coefficient thermistor is housed in the insulating case so as to be sandwiched between two electrode plates. Further, a part of the electrode plate is extended out of the insulating case as a power supply lead terminal. When the object to be heated is heated, the entire heater having the above configuration is regarded as a heating means, in other words, a heater, and the object to be heated is placed on the radiator plate for heating.

[0003]

However, in the heater having the above-described structure, it is easy to heat the object to be heated having a flat surface, but it is difficult to heat the object to be heated having a curved surface such as a column or a cylinder. Not suitable for heating. As means for solving such a problem, there is a structure in which a positive temperature coefficient thermistor, which is a heating means, is formed in an annular shape, that is, a ring shape, and the object to be heated, such as the column shape, is inserted thereinto to heat the entire outer periphery. Although it is conceivable, there are problems such as a significant increase in production cost.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to form an object to be heated such as a columnar shaped body without forming a positive temperature coefficient thermistor, which is a heating means, in an annular shape. An object of the present invention is to provide a heater configured to be able to heat the entire outer periphery.

[0005]

Means for Solving the Problems] The object according to the present invention, by heating from the outer periphery of the object to be heated, the heating device for heating transpiration said impregnated in the object to be heated chemical, the object to be heated A heat generating means positioned at a part of an outer peripheral portion of the heat generating member; an annular heat conducting member which sandwiches the heat generating element and conducts heat generated from the heat generating means along an outer peripheral surface of the object to be heated ; a feeding terminal for supplying power to the heating means is inserted one of the conductive member, and the power feed terminal to be externally projecting
An insulating container for insulatingly storing the heat generating means and the heat conducting member;
This is achieved by a heater constituted by the housing member .

[0006]

In other words, the heat generating means is not formed in an annular shape,
The heat conducting member for fixing the heat generating means is formed in an annular shape. Therefore, the heat generated from the heat generating means such as a positive temperature coefficient thermistor is conducted in a ring shape by the heat conducting member, and the heat is generated from the annular heat generating member. The wick can be heated from the entire outer periphery.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a heater according to the present invention will be described below with reference to FIGS. This embodiment shows an example of application to the heating evaporator. FIG. 1 is a sectional view showing the structure of the heater, FIG. 2 is a plan view showing the shape of the heater, and FIG. It is a bottom view showing a shape. First,
Explaining the outer shape of the heater 1, as shown in FIG. 1, an insertion port 2 for inserting a liquid-absorbing core 21, which is a body to be described later, is provided at a central portion, and the overall shape viewed from the upper surface and the lower surface Has a substantially annular shape as shown in FIGS.

The positive temperature coefficient thermistor 3 corresponds to a heat generating means in the present invention. The plane shape of the positive temperature coefficient thermistor (hereinafter abbreviated as the thermistor) 3 is not annular, and in this embodiment, a dotted line in FIG. As shown in the figure, a disk-shaped one is applied. However, the disk shape is an example, and a square shape, a cube shape, or the like may be applied. In addition, the heat generation temperature of the thermistor 3 is in the range of 40 to 450 ° C. to evaporate the evaporant, and can be appropriately adjusted depending on the type and use of the evaporant. Annular electrodes 4 and 5 are pressure-bonded to the upper and lower surfaces of the thermistor 3 with an adhesive, and power supply terminals 6 and 7 are provided on the electrodes 4 and 5. FIG. 1 shows the power supply terminal 6 connected to the electrode 5.

Heat conductive plates 8 and 9 are provided so as to sandwich the electrodes 4 and 5 from above and below. Heat conduction plates 8, 9
Is equivalent to the heat conducting member in the present invention, and the planar shape of the heat conducting plates 8 and 9 is formed in an annular shape so as to surround the insertion hole 2. Therefore, one end of each of the heat conducting plates 8 and 9 is
As shown in FIG. The annular insulating case 11 includes the thermistor 3 integrated as described above,
The cross-sectional shape is a shallow cylindrical body as shown in FIG. 1, but the plane shape is shown in FIG.
As shown in FIG. The lower surface of the annular insulating case 11 is closed by a substantially annular insulating lid 12 as shown in FIG. 3, and the power supply terminals 6, 7 project through the insulating lid 12 so that power can be supplied. Therefore,
Except for the power supply terminals 6 and 7, the electrodes 4, 5 and the thermistor 3 are made inaccessible from the outside, and are configured so as to prevent an undesired electric shock accident or leakage accident.

The lower end of the central cylindrical portion 11a of the annular insulating case 11 and the insulating lid 12 are fixed by bonding, but in this embodiment, they are fixed by eyelets 13 so as to surround the side surface of the cylindrical portion 11a. . The eyelets 13 are the insulating lid 1
2 and acts as a heat sink.

The assembling of the heater 1 will now be described. The thermistor 3 and the electrodes 4 and 5 are integrated into an annular insulating case 11, and the lower opening is closed by an insulating lid 12. At this time, the power supply terminals 6 and 7 are inserted into terminal insertion holes (not shown) formed in the insulating lid 12, and then the eyelets 13 are swaged.

When the heater having the above configuration is applied to a heating evaporator, the liquid absorbent core 21 is inserted into the insertion port 2, and the lower end of the liquid absorbent core 21 is immersed in the medicine stored in the medicine container 22. And is configured to suck up the drug.

Next, the operation of heating the liquid absorbent core 21 will be described.
When power is supplied to the thermistor 3 through the power supply terminals 6 and 7 and the electrodes 4 and 5, the thermistor 3 generates heat, and this heat is transmitted through the heat conduction plates 8 and 9 provided above and below the thermistor 3. Is transmitted to the outside. Therefore, thermistor 3
The generated heat is annularly conducted around the outer periphery of the liquid absorbent core 21 even though the liquid is positioned at a part outside the liquid absorbent core 21.

The heat conducted in this manner is further conducted to the cylindrical portion 11a and the eyelet 13, and heats the liquid absorbing core 21 over the entire outer periphery. In addition, since the conducted heat is equalized by the heat conducting plates 8 and 9 and the like, the liquid absorbing core 21 is heated in a state where the heating unevenness is reduced, and the heat absorption and evaporation can be performed at a good temperature.

In addition, the calorific value is stabilized with a certain heat radiation coefficient, and at the same time, fluctuations in conditions around the main body of the heater 1, that is, changes in the temperature of the liquid absorbing core 21 which is a non-heated material and changes in the air flow. Thermistor 3 in response to conditions such as
Controls the self-temperature, and the heat conducting plates 8 and 9 equalize the heat.
Therefore, the liquid absorbent core 21 which is not heated is heated at a constant temperature.

Next, a second embodiment of the present invention will be described with reference to FIG. The difference between this embodiment and the first embodiment is that instead of the heat conductive plates 8 and 9, an insulating filler 31 having excellent heat conductivity is filled in the annular insulating case 11 and solidified. In this embodiment, the insulating filler 31 corresponds to the heat conductive member according to the present invention. In the description of the embodiment, members having the same functions as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

That is, in this embodiment, the thermistor 3 and the electrodes 4 and 5 are positioned in the annular insulating case 11 by the filled and solidified insulating filler 31. Since the insulating filler 31 is filled in the inner space of the annular insulating case 11, its shape becomes annular. Then, by energizing the thermistor 3 in the same manner as described above, the thermistor 3
Generates heat, and the generated heat is transmitted annularly by the insulating filler 31. This heat is applied to the cylindrical part 1 as described above.
1a, the absorbent core 21 is heated via the eyelets 13. Therefore, although the thermistor 3 as the heating means is non-annular, the liquid-absorbing wick 21 as the object to be heated is heated from the outside.

The structure shown in the present embodiment is simple because the insulating filler 31 is filled in the annular insulating case 11 and the thermistor 3 is fixed. The heating and the uniformization of the temperature during the heating are performed in the same manner as described above.

Although the embodiment of the present invention has been described above, the thermistor 3 may have any shape such as a tablet shape, a disk shape and a cube shape as long as it is a non-ring shape. Further, corresponding to the shape of the inner peripheral edge of the annular insulating case 11, that is, the shape of the cylindrical portion 11a, for example, if the inner peripheral edge is curved, the shape may be at least partially curved in accordance with the shape, If the inner peripheral edge is square, it can be formed to match this shape.

As for the thermistor 3, a varistor, a fuse, a metal film resistor and the like can be used together from the viewpoint of safety. Furthermore, by making the power supply terminals 6 and 7 partly thin to reduce the cross-sectional area, it is possible to adopt a safety structure in which when a large unexpected current flows, the thin part breaks off due to heat generation. As for the heat conductive plates 8 and 9 and the insulating filler 31 for fixing the thermistor 3 and conducting heat conduction, the former can be a metal plate of aluminum, silver, copper or the like having good heat conductivity, and the latter can be used. As for, a silicone resin or the like having excellent heat conductivity is suitable. In the above embodiment, the case where the heat conductive plates 8 and 9 are used (FIG. 1) and the case where the insulating filler 31 is used (FIG. 4) are separately illustrated, but the present invention is limited to such a form. Instead, a configuration in which both a heat conductive plate and an insulating filler are used in combination may be employed. The heating target of the heater is not limited to the liquid absorbent core 21.

[0021]

As described above, in the heater according to the present invention, a non-annular heat generating means is provided in a part of the annular heat conducting member, and the heat generated from the heat generating means is transmitted in an annular manner. The non-heated material is configured to be uniformly heated from the outside. Therefore, the outer periphery of the non-heated object can be annularly heated without making the heating means itself small and annularly formed, so that, for example, the power supply terminal can be provided close to one side, and the wiring structure can be formed. Etc. can be easily performed, and the structure of the heater can be simplified and made compact.
Further, the cost of the heater can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heater according to a first embodiment of the present invention.

FIG. 2 is a plan view of a heater.

FIG. 3 is a bottom view of the heater.

FIG. 4 is a sectional view of a heater according to a second embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 heater 2 insertion opening 3 positive temperature coefficient thermistor 4, 5 electrode 6, 7 power supply terminal 8, 9 heat conductive plate 11 annular insulating case 11 a cylindrical portion 12 lid member 13 eyelet 21 liquid absorbing core 31 insulating filler

Claims (1)

(57) [Scope of request for utility model registration] 1. A heating device which is positioned at a part of an outer peripheral portion of a heated object in a heater for heating and evaporating a chemical solution impregnated in the heated object by heating from an outer periphery of the heated object. An annular heat conducting member which sandwiches the heating element and conducts heat generated from the heating means along the outer peripheral surface of the object to be heated, and one of the heat conducting members being inserted into the heat generating means. Power supply terminal for supplying power and projecting the power supply terminal to the outside
Enabling the heat generating means and the heat conducting member to be insulated and housed
A heater characterized by comprising an insulating storage member .