JP2003240650A - Heat-reactive odor-producing component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new heat-reactive odor-producing component having no risk of inflammation even in operation, and having excellent long-term stability. <P>SOLUTION: In this heat-reactive odor-producing component 1 with an order generation material 3 sealed in a storage member 2 breaking at a prescribed temperature, an incombustible material is used as the odor producing material 3. Hereby, even if the odor producing material 3 is released in the periphery and heated, the material never ignites, and there is no risk at all of enlarging an overheat accident. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-reactive odor generating component which can notify the occurrence of an overheating accident in an electric device or the like by an odor.

[0002]

2. Description of the Related Art Conventionally, in electrical equipment, household appliances, etc., an overcurrent flows due to an increase in load, poor contact, leakage, etc., causing the temperature of the equipment to become abnormally high, which causes overheating. It may lead to an accident and, in the worst case, a fire.

As a method of preventing such an overheating accident, for example, a color-changing tape that changes color due to a temperature rise is attached to a site where heat is expected in advance, and the presence or absence of the color change is visually confirmed. Therefore, a method of detecting an abnormal heat generation phenomenon has been proposed.However, with this method, it is necessary to constantly monitor the discoloration tape, and in addition to the local heat generation phenomenon at a hidden position such as inside the equipment, etc. Has the drawback of not being able to figure this out exactly.

Therefore, recently, odor generating substances such as alcohols are enclosed in a resin capsule, a resin tape or a tube, and the odor generating substances are attached in advance to a site where heat generation is expected, and the odor generating substances are generated by the heat generation. The odor generating substance inside is melted by encapsulating the capsule etc. and the presence of the odor is detected directly by a person nearby or indirectly by using a gas detection device etc. A detection method has been proposed (JP-A-5-18).
831, JP-A-6-66646, and JP-A-6-666.
47 etc.).

[0005]

By the way, since most of the conventional odor sensors are those that appeal to the human sense of smell to inform of the fever phenomenon, the odor generating substance is generally used for the human body such as alcohols. Harmless substances are selected. However, most of conventional odor generating substances represented by such alcohols are flammable, so that the odor generating substance itself may be ignited by heat generation.

Further, since the odor generating substance is enclosed in a resin capsule, resin tape or tube, the durability is poor and the capsule or resin tape deteriorates due to long-term use, causing malfunction. It is also possible to end up.

Therefore, the present invention has been devised in order to effectively solve such a problem, and its main purpose is to provide a novel thermal reaction which has no danger of ignition and is excellent in long-term stability. The object is to provide a sexual smell generating component.

[0008]

In order to solve the above-mentioned problems, the present invention provides a heat-reactive odor generating component in which an odor generating substance is enclosed in a housing member which is destroyed at a predetermined temperature, as shown in claim 1. In the heat-reactive odor generating component, a non-flammable substance such as a fluorocarbon compound is used as the odor generating substance.

Therefore, even if the odor-generating substance is diffused, the odor-generating substance itself does not ignite due to heat generation.

When a compound containing no chlorine atom is used as the fluorocarbon compound as described in claim 3, it is possible to surely avoid adverse effects on the human body and the local environment.

Further, as described in claim 4, the accommodating member is made of a metal container having a divergent port, and a low melting point substance that melts down the divergent port at a predetermined temperature, for example, as described in claim 5. If the one sealed with a lid made of a low melting point alloy is used, the odor generating substance can be stably encapsulated for a long period of time, so that the long-term reliability is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment for carrying out the present invention will be described with reference to the accompanying drawings.

1 and 2 show an embodiment of a heat-reactive odor producing component 1 according to the present invention.

As shown in the figure, in this heat-reactive odor generating component 1, an odor generating substance 3 is housed in a cylindrical housing member 2 and a divergent port 4 formed in the center of the upper surface is made of a low melting point substance. It is formed by sealing with a lid 5.

The accommodating member 2 for accommodating the odor generating substance 3 is not particularly limited as long as it is a material capable of stably accommodating the odor generating substance 3, and may be metal, glass, ceramic or the like. In addition to the above inorganic materials, it is possible to use organic materials such as plastics. However, in view of their properties, a metal simple substance or an alloy having excellent thermal conductivity and long-term stability, that is, a metal container such as a metal can is used. It is desirable to use. Further, the shape of the accommodating member 2 may be a box shape other than the cylindrical shape, and the form thereof is not particularly limited.

On the other hand, the lid 5 that closes the divergence port 4 has a low melting point whose melting point is in the temperature range immediately before there is a risk of overheating accident or equipment failure due to overheating, for example, in the range of 50 ° C to 200 ° C. The substance is not particularly limited as long as it is a substance, but it is desirable to use a low melting point metal that melts and falls as soon as the melting point is reached to completely open the divergence port 4. Specifically, metals such as lead, tin, zinc, bismuth, and indium, or alloys thereof are suitable, and a desired melting point temperature can be freely set by selecting these metals or alloying them in a predetermined ratio. Can be set. For example, the melting point of indium alone is about 156 ° C., and the melting point of tin alone is 23.
Although the temperature is 2 ° C, a low melting point alloy having a melting point of 117 ° C can be obtained by alloying 52 parts by weight of indium and 48 parts by weight of tin. Therefore, if this temperature is exceeded, there is a risk of overheating accident or failure. Therefore, such an indium-tin alloy is used. In consideration of environmental pollution, it is preferable to refrain from using harmful metals such as lead, cadmium, and mercury as much as possible.

On the other hand, the odor generating substance 3 enclosed in the accommodating member 2 is not a conventional flammable substance such as alcohol represented by ethanol or the like, but a nonflammable substance which is almost harmless to the human body and is hard to ignite. , For example, fluorocarbon compounds are used, more preferably global warming,
A compound that does not contain chlorine atoms, which has a low ozone depletion effect, is preferable.

As shown in FIG. 2, the odor generating component 1 of the present invention having such a structure is installed near a heat generating portion 6 to be monitored, for example, a motor, an integrated circuit, a switchboard, or an adhesive. If the temperature of the exothermic part 6 becomes higher than the normal temperature and becomes overheated by directly attaching and fixing it to the exothermic part 6 using, the lid 5 will melt down due to the heat. The divergence port 4 opens, and the odor generating substance 3 inside diverges from the divergence port 4 to the outside, so that the odor can enter the surroundings.

As a result, a nearby person can directly detect the phenomenon by sight with olfaction, or indirectly by detecting the presence of a gas sensor that reacts to the odor generating substance 3 with high sensitivity and sounding an alarm. The presence of the odor generating substance 3, that is, the fact that the heat-generating portion 6 to be monitored may become overheated and may cause an overheating accident can be notified.

Further, since the odor generating substance 3 is made of a non-combustible substance such as a fluorocarbon compound, even if the component 1 of the present invention is activated and the odor generating substance 3 is radiated to the surroundings and heated, it ignites. There is no danger of increasing the overheating accident.

Furthermore, if an inorganic material such as a metal can is used as the containing member 2 for containing the odor generating substance 3, the durability is significantly improved and stable performance can be exhibited for a long period of time.

[0022]

EXAMPLE Next, a heat-reactive odor generating component 1 according to the present invention
Specific examples of the above will be described.

(Example) Novec HF manufactured by Sumitomo 3M, which is one of fluorocarbon compounds, as an odor generating substance
0.5 g of E-7200 (chemical formula C ₄ F ₉ OC ₂ H ₅ boiling point 76 ° C., no flash point) was filled in a metal container 2 as shown in FIG. 1, and its odor emission port 4 was made of a low melting point alloy. It was sealed with a lid 5 made of one indium-tin alloy (melting point 74 ° C.). Then, the odor generating component 1 is installed in several places in the switchboard, and the odor generating substance, Novec HFE-7200.
After installing an odor sensor that reacts with high sensitivity to, part of the switchboard was heated to 100 ° C.

As a result, the lid 5 of the metal container 2 of the odor producing component 1 provided near the heated portion melts down, the odor producing substance 3 leaks from the odor emitting port 4, and the output of the odor sensor is output. The temperature rose and an abnormal temperature was detected.

An electric spark was brought into contact with the Novec HFE-7200 leaking from the odor producing component for 30 seconds, but it did not burn.

(Comparative Example) An odor generating part having the same structure as that of the example was manufactured except that ethanol (chemical formula C ₂ H ₅ OH, boiling point 76 ° C., flash point 4 ° C.) was used as the odor generating substance. Similarly, the odor generating component was installed in several places in the switchboard, and an odor sensor that reacts with high sensitivity to ethanol, which is the odor generating substance, was installed, and then part of the switchboard was heated to 100 ° C.

As a result, similarly to the embodiment, the odor generating component provided near the heated portion was activated to increase the output of the odor sensor, and an abnormal temperature was detected. There is a danger if there is a leak and sparks nearby.

[0028]

In summary, according to the present invention, since a non-combustible substance such as a fluorocarbon compound is used as the odor generating substance, even if the odor generating substance is emitted, the odor generating substance itself ignites due to heat generation. Therefore, it is possible to prevent the damage from spreading. Since the metal container is used as a member for accommodating this, it is possible to stably encapsulate the odor generating substance for a long period of time, and thus it exhibits an excellent effect such as improvement of long-term reliability.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a heat-reactive odor generating component according to the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of a heat-reactive odor generating component according to the present invention.

[Explanation of symbols]

1 Thermally reactive odor generating parts 2 Housing member (metal container) 3 Odor generating substances 4 divergence mouth 5 Lid 6 fever

Claims (5)

[Claims] 1. A heat-reactive odor generating component in which an odor generating substance is enclosed in a housing member that is destroyed at a predetermined temperature, wherein the odor generating substance is a nonflammable substance. . 2. The heat-reactive odor generating component according to claim 1, wherein the odor generating substance is a fluorocarbon compound. 3. The heat-reactive odor generating component according to claim 2, wherein the fluorocarbon compound is a compound containing no chlorine atom. 4. The container according to claim 1, wherein the containing member is a metal container having a divergent port, and the divergent port is sealed with a lid made of a low melting point substance that melts down at a predetermined temperature. 4. The heat-reactive odor generating component according to any one of 3 to 3. 5. The heat-reactive odor generating component according to claim 4, wherein the low-melting substance forming the lid is made of a low-melting alloy.