JP2002350247A - Temperature abnormality detection component and temperature abnormality detector using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new temperature abnormality detection component and a temperature abnormality detector capable of rapidly detecting and determining the presence and position of an abnormal heat generation phenomenon by a smell and coloration. SOLUTION: A smell generation substance 3a and a smoke generation substance 3b are housed in a housing case 2 with an effusing port 4 formed, and the effusing port 4 is sealed by a lid body 5 formed of a low-melting substance. Thereby, when a heat generation position used for a monitoring object is overheated, the lid body 5 is melted down by its heat to open the effusing port 4 and smoke is generated along with a smell from the effusing port 4, so that the phenomenon and the position thereof can easily be detected and determined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature anomaly detecting component capable of notifying the occurrence of an overheating accident of an electric device or the like by sound or light in addition to a smell, and a temperature anomaly detecting device using the same. It is.

[0002]

2. Description of the Related Art Conventionally, in electric equipment and home electric appliances, an excessive current flows due to an increase in load, a contact failure or a short circuit, and the temperature of the apparatus becomes abnormally high. It may cause a serious overheating accident such as a fire.

As a method of preventing such an overheating accident, for example, a discoloration tape that changes color due to a rise in temperature is attached to a portion where heat generation is expected, and the presence or absence of the discoloration is visually checked. Therefore, a method of detecting an abnormal heating phenomenon has been proposed, but in this method, it is necessary to constantly monitor the discoloration tape and accurately detect the local heating phenomenon inside the device. There is a disadvantage that it cannot be grasped.

For this reason, recently, an odor-generating substance such as alcohols is sealed in a resin capsule, a resin tape or a tube, and this is previously attached to a site where heat generation is expected, and the odor-generating substance is generated by the heat generation. An abnormal overheating phenomenon occurs when the capsule etc. that encapsulates is melted and the odor generating substance inside diffuses and the presence or absence of the odor is directly sensed by a nearby person or indirectly using a gas detection device etc. (Japanese Patent Laid-Open No. 5-1)
8831, JP-A-6-66646, JP-A-6-66
647).

[0005]

By the way, in the method of notifying the occurrence of the abnormal heat generation phenomenon by the smell,
For example, if the diffusion direction of the odor is deviated due to the wind direction or the like, the odor cannot be detected, or if multiple odors are installed in the same area, it is difficult to accurately specify the location where the odor is generated. There are drawbacks.

The present invention has been devised in order to effectively solve such a problem, and an object of the present invention is to provide a novel method capable of quickly detecting and specifying the occurrence of an abnormal heat generation phenomenon and its position. It is intended to provide a temperature abnormality detection component and a temperature abnormality detection device using the same.

[0007]

According to the present invention, in order to solve the above-mentioned problems, as described in claim 1, a smoke generating substance is stored together with an odor generating substance in a storage case having a vent opening. This is a temperature abnormality detection component in which the divergent port is sealed with a lid made of a low melting point substance.

Therefore, if the housing case is overheated in a state where the temperature abnormality detecting component is placed at the heat generating part to be monitored, the lid melts down due to the heat and the divergence opening is opened. Smoke will be generated with the smell. As a result, even if the presence or absence of generation of an odor is not sensed, the abnormal heat generation phenomenon is recognized by the smoke, and the phenomenon and the position can be reliably detected and specified.

According to a second aspect of the present invention, the inside of the housing case is divided into two cells by a partition wall, and one of the cells contains an odor-generating substance and the other contains a smoke-generating substance. The same applies to the case where a divergence port is formed in each cell and the divergence port is sealed with a lid made of a low melting point substance.

If the volatilization temperature of the odor-generating substance is set lower than the volatilization temperature of the smoke-generating substance, first, only the odor-generating substance volatilizes, and the temperature increases. Since the smoke generating substance is volatilized, even if the odor generating substance is not sensed, the abnormal heat generation phenomenon can be reliably notified by the smoke generated thereafter.

According to a fourth aspect of the present invention, when the housing case is formed of a metal can and the lid is formed of a low-melting-point metal, the lid from which heat from the heat generating portion closes a divergent opening is formed. The heat sensitivity is good because the lid is instantaneously melted down while the heat is transferred well.

According to a sixth aspect of the present invention, in the temperature abnormality detection system using these temperature abnormality detection components, when the lid body is melted in the housing case of the temperature abnormality detection component, the divergence is generated. A spring is housed so as to protrude from the mouth, and a light emitting circuit and / or an alarm sound generating circuit which is turned on by the protrusion of the spring or both are provided outside the diverging port.

Therefore, when the lid is melted due to abnormal overheating and the divergence opening is opened, the odor is emitted from the divergence opening, and at the same time, the spring protrudes and the light emitting circuit or the alarm sound generating circuit is turned on, and the light or the alarm sound is emitted. The sound and the occurrence and location of the abnormal heat generation phenomenon can be reliably notified by light or sound together with the smell.

[0014]

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

FIGS. 1 and 2 show an embodiment of a temperature abnormality detecting component according to the present invention.

As shown in FIG.
Has a divergent substance 3 accommodated in a cylindrical accommodation case 2 and a divergent port 4 formed at the center of the upper surface thereof is sealed with a lid 5 made of a low melting point substance.

Here, the storage case 2 for storing the divergent substance 3 is not particularly limited as long as it is a material capable of stably storing the divergent substance 3, and may be made of an inorganic material such as metal, glass, or ceramic. In addition to the material, an organic material such as a plastic can be used. However, in view of its properties, it is desirable to use a simple metal or an alloy having particularly excellent heat conductivity and long-term stability. The shape of the storage case 2 may be a box shape other than the cylindrical shape, and the form is not particularly limited.

On the other hand, the lid 5 for closing the diverging port 4 has a low melting point having a melting point in a temperature range immediately before an overheating accident or a failure of equipment due to overheating may occur, for example, a range of 50 ° C. to 200 ° C. The material is not particularly limited as long as it is a substance, but a low-melting-point metal that melts and falls immediately upon reaching the melting point and completely opens the diverging port 4 is desirable. Specifically, metals such as lead, tin, zinc, bismuth, and indium or alloys thereof are suitable. By selecting these metals or alloying them at a predetermined ratio, the desired melting point temperature can be freely adjusted. 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., alloying at a ratio of 52 parts by weight of indium and 48 parts by weight of tin results in a low melting point alloy having a melting point of 117 ° C. If this temperature is exceeded, an overheating accident or failure may occur. In such a case, such an indium-tin alloy is used. In consideration of environmental pollution, it is preferable that harmful metals such as lead, cadmium and mercury be used as little as possible.

On the other hand, the divergent substance 3 enclosed in the storage case 2 is a mixture of an odor-generating substance and a smoke-generating substance. From these, those that emit a mixture of smell and smoke are selected. That is, the odor generating substance is not particularly limited as long as it can be easily detected by a human olfaction or a gas detection sensor after being volatilized by heating. For example, ethanol, propanol,
Alcohols such as butanol and phenol; unsaturated hydrocarbons such as methane, butane and octane; unsaturated hydrocarbons such as ethylene, acetylene, butadiene, benzene and naphthalene; ketones such as acetone and methyl ethyl ketone; Carboxylic acids such as lactic acid, acrylic acid and methacrylic acid, and esters such as methyl acetate and ethyl acetate can be used. On the other hand, the smoke generating substance is not particularly limited as long as it is volatile at the melting point temperature of the lid 5 and its presence can be easily confirmed visually. For example, a mixture of calcium oxide and carbon powder, etc. Are suitable.

Then, as shown in FIG. 2, the temperature abnormality detecting component 1 of the present invention having the above-described configuration is installed or adhered to a heating part 6 to be monitored, for example, a motor, an integrated circuit, a switchboard, or the like. If the temperature of the heat-generating portion 6 becomes higher than the normal temperature and it is overheated by attaching and fixing directly to the heat-generating portion 6 using an agent, the lid 5 melts down due to the heat. The divergence opening 4 is opened, and the radiating substance 3 inside radiates from the divergence opening 4 to the outside.

Thus, a nearby person can directly sense the phenomenon visually and together with the sense of smell, or indirectly detect the presence of the substance by a gas detection sensor and sound an alarm, etc., that is, the presence of the divergent substance 3, ie, the object to be monitored It can be notified that the heat generating portion 6 to be overheated may cause an overheating accident. Further, even if the odor does not reach the human or the gas detection sensor and is not sensed due to a cause such as a wind direction or the like, the presence of smoke can be easily confirmed only visually, so this is the case. Can also inform the abnormal heat generation phenomenon.

When the heating part 6 to be monitored is large or covers a wide range, a plurality of the temperature abnormality detecting parts 1 are combined with the heating part 6 or a fixed part is provided. It will be installed at intervals, but in that case, it is difficult to specify the heat generation location only by smell, but by including smoke generating substances,
By visually confirming the source of the smoke, the location of the abnormal overheating can be quickly and reliably identified, and an optimal response can be promptly taken.

Next, FIG. 3 shows another embodiment of the present invention.

As shown in the figure, in this embodiment, two cells 8a and 8
The cells 8a and 8b contain the odor-generating substance 3a and the smoke-generating substance 3b, respectively, and the cells 8a and 8b have divergent ports 4 and 4, respectively. Are sealed with a low-melting substance 5 respectively. That is, in the case of the above embodiment, the odor-generating substance and the smoke-generating substance are mixed and accommodated, but in the present embodiment, they are accommodated independently.

Then, as the odor generating substance 3a and the smoke generating substance 3b, those having different volatilization temperatures (boiling points) are selected.
Specifically, if the smoke generating substance is selected to be higher than the volatilization temperature of the odor generating substance, first, the odor generating substance volatilizes and diffuses first, and only the odor enters the surroundings. As a result, the smoke generating material volatilizes, and the smoke is trapped in the surroundings.

For this reason, in addition to the effects of the embodiment, a state in which only odor is generated and a state in which odor and smoke are mixed during the period from abnormal overheating to overheating accident In addition, three processes, such as a state in which only smoke is generated, can be obtained. By grasping the state by olfaction and vision, it is possible to grasp the abnormal overheating state of the monitoring target and quickly take appropriate measures. Can be. For example, at the stage where only the odor is generated, it can be determined that there is little risk of an overheating accident due to a low overheating state, and the overheating accident can be prevented by simple measures such as turning off the power. . Also, if the odor is left without being noticed, smoke will continue to be generated along with the odor, so it can be determined that the abnormal overheating condition has been further enhanced by the generation of the smoke, You can take action. Further, when the temperature rises and only smoke is generated, it can be determined that the danger of an overheating accident has increased, and appropriate measures such as preparation for fire extinguishing work can be taken promptly.

Here, the specific volatilization temperature (boiling point) of the odor-generating substance 3a and the smoke-generating substance 3b depends on the normal temperature of the heat generating portion 6 to be monitored, and is not particularly limited. However, for example, the odor generating substance 3a is desirably 150 ° C. or lower (under normal pressure), and the smoke generating substance 3b is desirably slightly higher than 180 ° C. (under normal pressure). . That is, the volatilization temperature of the odor generating substance 3a is 150 ° C.
Above, abnormal overheating cannot be grasped at an early stage, and when the volatilization temperature of the smoke generating substance 3b exceeds 180 ° C., not only can the phenomenon not be reported at an early stage, but also it can be completely volatilized. This is because there is a risk that an overheating accident may occur before finishing. On the other hand, if the volatilization temperature of the smoke-generating substance 3b is too low, there is an inconvenience that the volatilization temperature cannot be specified quickly before the overheating accident occurs. If so, the lower limit is considered to be around 160 to 170 ° C.

In the present embodiment, an example is shown in which the volatilization temperature of the odor generating substance 3a is lower than that of the smoke generating substance 3b.
Lower the smoke generating substance 3b, smoke is generated first,
The odor may be generated with a delay.

FIG. 4 shows an embodiment of a temperature abnormality detecting device 9 using the above-mentioned temperature abnormality detecting component 1.

As shown in FIG.
In the housing case 2 of the temperature abnormality detecting component 1, a coil spring 10 urged in a longitudinal direction (up and down in the figure) is housed, and a light generating circuit 14 in which a switch 11 is turned on by the coil spring 10 is provided above the coil spring 10. It is provided integrally.

That is, this light generation circuit 14 is
As shown in FIG. 1A, a switch 11 fixed immediately above a diverging port 4, a power source 13 such as a dry battery, and a light source 12 such as a light bulb or a light emitting diode are electrically connected.

Therefore, when the temperature of the temperature abnormality detecting component 1 rises from the state shown in FIG. 4A and the lid 5 is melted down and the divergence opening 4 is opened, the odor is radiated from the divergence opening 4 at the same time. As shown in FIG. 2B, the coil spring 10 whose extension is regulated by the lid 5 protrudes from the diverging port 4 and the switch 11 of the light generating circuit 14 is turned on, so that light is generated from the light source 12. Become.

Thus, when an abnormal overheating phenomenon occurs, light is emitted together with the odor. Therefore, the abnormal overheating phenomenon can be grasped by sensing the odor, and the position can be quickly identified by the light. it can. In particular, in the present embodiment, a more remarkable effect can be exerted when the apparatus is installed in a dark place such as a basement where light does not easily reach or at night. Further, as another embodiment of the present invention, if a buzzer that notifies by an alarm sound is used instead of or together with the light source 12, the occurrence and position of the abnormal overheating phenomenon can be detected by hearing in addition to visual and olfactory senses. Can also be identified quickly.

[0034]

FIG. 5 is a perspective view of a cubicle, which is a kind of switchboard, which is an example of electric equipment for explaining an embodiment of the present invention. This cubicle is 3m wide, 2.3m high,
2.0 m depth, 3 on each side, total 27
Area.

(Example 1) A storage case 2 having a structure as shown in FIG. 3 was used. One of the cells 8a contained an aqueous ethanol solution as an odor generating substance 3a, and the other contained a cell 8b. 3b, containing a mixture of calcium oxide and carbon powder,
4 was sealed with a lid 5 made of a low melting point alloy having a melting point of 80 ° C.

Then, the temperature abnormality detecting component 1 was installed in each of the three areas G1, I1, and I3 of the cubicle shown in FIG. 5, and an odor sensor was installed in each area, and then installed in the area I3. Only the temperature abnormality detecting component 1 was operated by overheating.

As a result, only the odor sensors provided in the areas A1, A3, C1, and C3 operated, and the operating position could not be specified by the odor sensor alone. When the vehicle entered the cubicle, it was visually recognized that the smoke near the region I3 was the thickest, and it was confirmed that only the temperature abnormality detection component 1 in the region I3 was activated, and the abnormal overheat occurrence position could be easily specified.

(Embodiment 2) A temperature abnormality detecting device 9 as shown in FIG. 4 is used, and is installed at three locations of cubicle regions G1, I1, and I3 shown in FIG.
After the odor sensor was installed in each area, only the temperature abnormality detection component 1 installed in the area I3 was overheated and operated.
In addition, ethanol was used as the odor generating substance 3a, and a light emitting diode was used as the light source 12. The lighting inside the cubicle was turned off to make it dark.

As a result, only the odor sensors provided in the areas A1, A3, C1, and C3 were activated, and the operating position could not be specified by the odor sensor alone. Enters the cubicle, the light emitting diode near the region I3 is turned on, and it is instantly recognized that the vicinity is bright, and it can be confirmed that only the temperature abnormality detection device 9 in the region I3 has been activated. The location of overheating occurrence was easily identified.

(Embodiment 3) A temperature abnormality detecting device 9 as shown in FIG. 4 is used, and is installed at three places of cubicle regions G1, I1, and I3 shown in FIG.
After the odor sensor was installed in each area, only the temperature abnormality detection component 1 installed in the area I3 was overheated and operated.
Note that ethanol was used as the odor generating substance 3a and a buzzer was used instead of the light source 12.

As a result, only the odor sensors installed in the areas A1, A3, C1, and C3 were activated, and the operating position could not be specified by the odor sensor alone. Entered the cubicle and found that the alarm sounded near area I3.
It was confirmed that only the temperature abnormality detection device 9 in the region I3 was activated, and the location of the abnormal overheating occurrence was easily identified.

[0042]

In summary, according to the present invention, when an abnormal overheating phenomenon occurs, smoke, light or sound is generated in addition to smell, so that the phenomenon can be observed not only by smell but also by sight and hearing. You can know. Therefore, it is possible to detect an abnormal heat generation phenomenon more reliably than in the case of using only the odor generating substance alone, and to exhibit an excellent effect that the abnormal heat generation portion can be quickly specified.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view showing an embodiment of a temperature abnormality detection component according to the present invention.

FIG. 2 is a sectional view showing an embodiment of a temperature abnormality detecting component according to the present invention.

FIG. 3 is a perspective view showing another embodiment of the temperature abnormality detecting component according to the present invention.

FIG. 4A is a schematic diagram showing an embodiment of a temperature abnormality detection device according to the present invention. (B) is a conceptual diagram showing the operating state.

FIG. 5 is a perspective view showing a cubicle used in the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature abnormality detection part 2 Housing case 3 Emitted substance 3a Odor generation substance 3b Colored substance 4 Emission port 5 Lid 6 Heat generation part 7 Partition wall 8a, 8b cell 9 Temperature abnormality detection device 10 Coil spring 11 Switch 12 Light source (buzzer) 13 Power supply 14 Light generation circuit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Kamoshida 5-1-1, Hidaka-cho, Hitachi City, Ibaraki Prefecture F-term in the Hidaka Factory, Hitachi Cable, Ltd. 2F056 UZ00 UZ05 UZ09 UZ10 5C083 AA01 BB24 DD09 JJ30 JJ46 5C086 AA06 CA30 CB01 DA40 FA02 FA11 GA02 GA09

Claims (7)

[Claims] 1. A temperature abnormality detecting component, wherein a smoke generating substance is stored together with an odor generating substance in a storage case having a vent formed therein, and the vent is sealed with a lid made of a low melting point substance. . 2. The storage case is partitioned into two cells by a partition wall, one of the cells contains an odor-generating substance, the other contains a smoke-generating substance, and each cell has a vent. A temperature abnormality detecting component, wherein the divergent port is formed and sealed with a lid made of a low-melting substance. 3. The temperature abnormality detecting component according to claim 2, wherein the volatilization temperature of the odor generating substance is lower than the volatilization temperature of the smoke generating substance. 4. The temperature abnormality detecting component according to claim 1, wherein the housing case is a metal can. 5. The temperature abnormality detecting component according to claim 1, wherein the low melting point substance is a low melting point metal. 6. A temperature abnormality detection system using the temperature abnormality detection component according to any one of claims 1 to 5, wherein when the lid is melted in a housing case of the temperature abnormality detection component, the divergence of the lid is melted. A temperature abnormality detecting device, comprising a spring accommodated so as to protrude from a mouth, and a light emitting circuit which is turned on by the projection of the spring outside the divergent mouth. 7. The temperature abnormality detecting device according to claim 6, wherein an alarm sound generating circuit is provided instead of or together with the light emitting circuit.