JPH1193A - Vaporizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vaporizer having small variation of vaporized amount and slight deterioration of characteristics by use for a long period of time, comprising a case, a vaporization core and a heater core, bringing the heater core into contact with the inner wall of a housing part through a molding product made of a silicone rubber. SOLUTION: This vaporizer comprises a case 4 having an insertion part of a vaporization core and a housing part of a heater core 3, a vaporization core to be inserted into the insertion part 6 of the case 4 and the heater core 3 to be housed in the insertion part. The heater core 3 is brought into contact with the inner wall of the housing part through a molding product 12 made of a silicone rubber. The molding product 12 has a shape for almost enclosing the outer face of the heater core 3 and for opening at least one of the upper and the lower parts of the molding product 12. After being inserted into the heater core 3, the molding product 12 is fixed to the inside of the housing part of the case 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporizing apparatus for heating a rod-shaped vaporizing core impregnated with a liquid from the outer periphery to volatilize the liquid.

[0002]

2. Description of the Related Art A conventional vaporizer using a PTC thermistor will be described below with reference to the accompanying drawings.

FIG. 3 is an exploded perspective view showing a structure of a vaporizer using a positive temperature coefficient thermistor heating element (hereinafter, referred to as a heater core). FIG. 4 is a case 4A of the vaporizer in FIG. It is sectional drawing in the -A part. 3 and 4, reference numeral 1 denotes a positive temperature coefficient thermistor element having electrodes on both main planes (hereinafter referred to as thermistor element), 2a and 2b.
Reference numeral denotes an electrode plate having a terminal portion, which is electrically and mechanically fixed to the electrode surface of the thermistor element 1 with a silicon-based adhesive (not shown) to form a heater core 3. Reference numeral 4 denotes a metal case, which is provided with a rod-shaped vaporizing core insertion portion 6 impregnated with a liquid and a housing portion 5 for housing the heater core, and has a function of transmitting heat generated by the heater core 3 to the vaporizing core. Reference numeral 7 denotes a lid made of a heat-resistant resin that covers a part of the bottom and side surfaces of the storage part 5 of the case 4. 8 is provided with a hole 9 for mounting a terminal portion of the electrode plates 2a and 2b and a hole 10 for mounting a vaporizer to each device using a screw or a boss pin.
And a lid that covers part of the side surface. Further, a filling resin 11 is interposed on the inner surface of the housing portion 5 of the heater core 3 of the case 4 so as to wrap the entire heater core 3 in order to efficiently transmit heat generated by the heater core 3 to the insertion portion 6 of the vaporizing core.

In the vaporizer configured as described above, when a voltage is applied to the terminals of the electrode plates 2a, 2b of the heater core 3, the thermistor element 1 generates heat, and the generated heat is transferred to the case 4 through the filling resin 11. To the insertion portion 6 of the vaporization wick, whereby the vaporization wick impregnated with the liquid can be heated to volatilize the permeated liquid. As is well known, the thermistor element 1 containing barium titanate as a main component is used as a safe and highly reliable heat source having a self-temperature control action.

[0005]

However, in the above-mentioned conventional construction, there is a problem that the heat transfer to the insertion portion 6 of the vaporizing core of the case 4 is large and varies. That is, in the conventional configuration, it is difficult to control the amount of the filling resin 11 in the storage portion 5 of the case 4 to a constant amount, and since the inside of the cured filling resin 11 contains air bubbles, the case is not provided in each vaporizer. The surface temperature of the insertion portion 6 of the No. 4 varies, and as a result, there is a problem that the amount of the liquid volatilized from the vaporization core is large and varies.

The present invention solves the above problems,
It is an object of the present invention to provide a vaporizer in which the variation in the surface temperature of the insertion portion of the vaporizing wick of the case 4 is reduced and the variation in the amount of liquid evaporation is suppressed.

[0007]

In order to achieve the above object, the present invention is to press-fit a silicone rubber molded body having a shape substantially enclosing the outer surface of the heater core between the inner surface of the case housing and the heater core. It is. With this configuration, unlike a conventional filled resin, by storing a molded body having a fixed shape and no internal bubbles, the surface temperature of the insertion portion of the vaporizing core becomes substantially equal, and as a result, the variation in the amount of liquid volatilized This makes it possible to obtain a vaporizer with a small amount.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a case having an insertion portion for a vaporization core and a storage portion for a heater core, a vaporization core inserted into the insertion portion of the case, and the storage portion. The heater core is provided so as to be in contact with the inner wall of the storage section via a molded body made of silicon rubber, and a bubble formed into a fixed shape between the heater core and the inner surface of the storage section is provided. The heat generated by the heater core can be efficiently and efficiently transmitted to the insertion portion of the vaporization core by interposing a silicone rubber molded body that is not included therein, and a vaporization device with a stable evaporation amount can be obtained. is there.

According to a second aspect of the present invention, the molded body is formed so as to substantially wrap the outer surface of the heater core, and the outer surface of the heater core is formed to be substantially wrapped by the heat transfer body with almost no gap. In addition, the heat generated by the heater core can be transmitted to the storage portion of the case, whereby the insertion portion of the vaporization core can be uniformly heated, and a vaporization device with a stable evaporation amount can be obtained.

According to a third aspect of the present invention, the molded body has an opening in at least one of the upper and lower parts, whereby the heater core press-fitted into the case accommodating part is formed inside the heat transfer body. The heater core is ventilated to the heater core through the terminal outlet of the case, preventing performance degradation due to the lack of oxygen in the thermistor element and providing a vaporizer that can withstand long-term use. Is what you can do.

According to a fourth aspect of the present invention, the molded body after the insertion of the heater core is press-fitted and mounted on the inner surface of the case accommodating portion, thereby forming a fixed shape between the heater core and the inner surface of the case accommodating portion. The body can be compressed and mounted, eliminating the gap between the heater core and the inner surface of the case housing, transferring the heat generated by the heater core to the case without loss, and efficiently heating the insertion portion of the vaporizing core. is there.

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a perspective view of a vaporizer, FIG.
FIG. 2 is an exploded perspective view of components of the vaporizer of the present invention. Reference numeral 13 in FIG. 1 denotes a vaporized core, and 12 in FIG. 2 denotes a molded body. The other components have essentially the same functions as those of the conventional product, and therefore are denoted by the same reference numerals and description thereof is omitted.

First, stainless steel electrode plates 2a and 2b are provided on both electrode surfaces of the thermistor element 1 at a switching temperature of 200.degree.
Are bonded together with a silicone adhesive to form a heater core 3, the heater core 3 is inserted into a molded body 12 made of a silicone resin molded into a rectangular cylindrical shape, and then a housing 5 of the heater core 3 of a metal aluminum case 4 is formed. Press-fit. Although the outer dimensions of the molded body 12 are kept substantially the same as the inner dimensions of the storage section 5 formed in the case 4, the outer dimensions are slightly larger than the inner dimensions of the storage section 5 by inserting the heater core 3. It can be press-fitted so that there is no gap between the inner wall of the storage section 5 and the storage section 5. The molded body 12 wraps around the outer surface of the heater core 3 with almost no gap, but at least a part of the upper and lower portions of the heater core is exposed from the molded body 12 so that the molded body 12 Protects against oxygen deficiency. Next, a case 7 and a case 8 made of heat-resistant phenol resin are fitted to the upper and lower portions of the storage portion 5 of the case 4, and the case 4 is held. At this time, the electrode plate 2 of the heater core 3
The terminal portions a and 2b correspond to the heater core 3 provided in the case 8.
Each of the holes 9 is also exposed to the outside of the vaporizer through a terminal extraction hole 9 which also serves as a ventilation hole for the gas. In the vaporizer configured as described above, the vaporization wick 1 inserted in a liquid container (not shown)
3 between the electrode plates 2a and 2b.
A voltage of V is applied to cause the heater core 3 to generate heat, and the heat heats the surface of the insertion portion 6 of the vaporizing core 13, and the surface temperature variation, the weight variation of the case 4 containing the heater core 3, and the molded body After cutting, the section was examined for the presence of air bubbles, and the results are shown in (Table 1). In addition, the results of a similar investigation performed on a vaporizer having a conventional configuration are also shown.

[0014]

[Table 1]

As is clear from Table 1, the vaporizer of the present invention has a temperature variation 18 on the surface of the insertion portion 6 of the vaporizer core 13.
It can be seen that the temperature of the conventional product is 180 ° C. ± 4 ° C., which is lower than 3 ° C. ± 2 ° C., and the variation is large. For this reason, as a result, the variation in the amount of liquid volatilized from the vaporization wick 13 increases, and for example, when used in a mosquito trap, a problem may occur that the chemical cannot be volatilized effectively. This is because the molded body 12 of the present invention is a molding die in advance and is a molded body having a constant weight and a constant shape. Therefore, the weight variation of the case 4 accommodating the heater core 3 is small, and only the outer surface of the heater core 3 is formed. This is because the molded body 12 is press-fitted into the housing portion 5 of the case 4 without any gap so as to wrap the heat, and the heat generated by the heater core 3 can be transmitted to the vaporization core 13 without loss. Further, since the entire heater core 3 is not sealed, the thermistor element 1 is prevented from being in an oxygen-deficient state, and characteristics are not deteriorated even when used for a long time. Further, when the cross section of the molded body 12 is observed, it can be seen that no air bubbles are contained therein and the heat of the heater core 3 is more effectively transferred. On the other hand, in the conventional vaporizer, the resin is poured into the gap between the heater core 3 and the storage portion 5 of the case 4 and is heated and cured and filled. Therefore, it is difficult to control the filling amount to a constant weight. It is considered that the heat generated by the heater core 3 is transmitted to the insertion portion 6 of the vaporization core 13 due to the loss of heat generated by the heater core 3 because the section 11 includes many bubbles. In addition, since the filling resin 11 has a structure in which the entire heater core 3 is wrapped, there is a possibility that the characteristics may be deteriorated in long-term use.

In the above components, the electrode plates 2a, 2b
Since a heat-resistant metal such as stainless steel is used because thermistor element 1 generates heat, good electrode plates 2a,
2b, and the case 4 is preferably made of a metal having excellent heat conductivity, such as aluminum or copper. The molded body 12 does not adversely affect the thermistor element 1 and has a heat resistance of 20.
Silicone rubber that can maintain elasticity even at around 0 ° C. is desirable. The case 7 and the case 8 withstand heat generated by the heater core 3 and have good heat resistance and heat insulating properties which do not adversely affect the thermistor element 1, for example, PP.
It is preferable to use an S resin, a phenol resin or the like.

[0017]

As described above, the present invention press-fits and interposes a silicone rubber molded body having a fixed shape so as to substantially wrap the outer surface of the heater core between the inner surface of the case housing and the heater core. Unlike the conventional resin filling method, since the weight of the molded body is constant and contains no air bubbles, the heat generated by the heater core can be effectively transmitted to the insertion portion of the vaporizing core, and as a result, It is possible to provide a vaporizer in which the variation in the amount of volatilization is small and the characteristic is less deteriorated even in long-term use.

[Brief description of the drawings]

FIG. 1 is a perspective view of a vaporizer according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the vaporizer of the same embodiment.

FIG. 3 is an exploded perspective view of a conventional vaporizer.

FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 after a heater core is assembled in a case of the vaporizer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Positive characteristic thermistor element 2a, 2b Electrode plate 3 Heater core 4 Case 5 Storage part 6 Insertion part 7 Case 8 Case 9 Terminal extraction hole 10 Mounting hole 11 Filled resin 12 Molded body 13 Vaporization core

Claims (4)

[Claims] 1. A case having an insertion portion for a vaporization core and a storage portion for a heater core, a vaporization core inserted into the insertion portion of the case, and a heater core stored in the storage portion, wherein the heater core is made of silicon rubber. A vaporizer configured to be in contact with the inner wall of the storage section via a molded article made of a resin. 2. The vaporizer according to claim 1, wherein the molded body has a shape substantially covering the outer surface of the heater core. 3. The vaporizer according to claim 2, wherein at least one of the upper and lower parts of the molded body is closed. 4. The vaporizer according to claim 1, wherein the molded body is press-fitted to the inner surface of the housing after inserting the heater core.