JPH03102728A - Thermal protector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is used in various electrical equipment for industry, academia, and industry, and is used to protect offshore equipment from burnout due to unusual heat generation and excessive flow. This relates to a thermal protector.

Conventional technology Conventionally, this type of thermal disc has a structure in which a mount body in which the q-movement side electrode and the internal measurement-side electrode are set facing each other is housed in a container. Such a thermal protector is attached to the heat generating part of various types of air conditioners, and when the temperature of that part rises due to some abnormality or excessive rE current flows, → the moving side electrode snaps. By reversing the action sacred heat response cord,
The same element has a protective function of moving away from the fixed side voltage t4i and cutting off the power supply to the electric device (iL).

Problems to be Solved by the Invention This type of →normal detector is particularly useful for motors and
Kawai used in light ballasts, etc., must be able to withstand large currents. However, when such a structure is miniaturized, the volume of the container becomes smaller, and the inside of the container increases due to the arc heat caused by the intense current flow between the contacts. There was a major drawback in that the IJJ could not be used to prevent a fire from breaking and igniting outside the container.

The present invention was made to solve the problem of 1" 1! in a small tie m. Therefore, it is highly safe and does not cause ignition even when used in motors, fluorescent lamp ballasts, etc. This provides a small thermal protector.

Means for Solving the Problems The dual protector of the present invention has a movable side electrode in which a movable electrode lead wire is connected to a snap-action type thermally responsive element having a contact fixed at its tip, and a fixed side electrode facing each other. The mount body provided with the above is housed in a container, and the fixed electrode is
It consists of a fixed electrode lead, a fusible 11 gold V4 wire attached to the tip of the fixed electrode lead, and a contact point fixed to the tip of the fusible 11 metal wire.

Function: When a large current flows through the Therma JL protector, the fusible 11 metal wire instantly melts or becomes deformed due to softening, and the contacts become open, cutting off the current flow to the Therma JL protector. As a result, it is possible to prevent fire from igniting outside the container due to intense arcing between the contacts.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the thermal protector according to the embodiment of the present invention includes a snap-action thermally responsive element 2 having a contact point 1 welded to its tip, and one end of the snap-action thermally responsive element 2. A movable side m-pole 5 consisting of an auxiliary metal plate 3 welded at one end and a movable electrode lead wire 4 welded to the other end of this auxiliary metal plate cross-contacts with the contact 1 at a predetermined contact pressure. A diameter of 0.4 to 0.0 mm made of, for example, Monel metal, with six contacts fixed to the tip by welding.
A captive side electrode 9 consisting of a 6 mm fusible 11 metal wire 7, i; and a fixed positive electrode lead wire 8 to which this fusible metal wire is welded.
A mount body 11, which is integrated with a bead 10 made of glass or resin, is housed in a container 2IA 12 made of glass or resin, and the opening of this container is filled with heat-curing flame-retardant silicone rubber 1, Alternatively, it is sealed with a filler 13 made of epoxy resin.

When a large current flows through the Thermal Rub U Tector having the above configuration, the fusible metal wire 7 melts instantly? Otherwise, deformation occurs due to softening, and as a result, the contact 1 of the movable electrode 5 separates from the contact 6 of the fixed electrode 9, and the current supply to the thermal protector is cut off. Therefore, according to this thermal protector, it is possible to prevent ignition to the outside of the container 12 due to the intense arc generated between the contacts 1 and 6.

Based on the above-mentioned actual example, we manufactured a small thermal protector (invention 1.11) with . When I went there, I was given the same number of fruits as shown in Table 2. I. In Table 1, the conventional product is {κ
Those with a structure that could be transported using the conventional technology, and the comparative products in Table 2 are {κ
, total length 18mm).

(Margins below) As is clear from Table 1, Table I, and Table 21S2, this Masaaki product is a small-sized one that is 40% smaller than the original product compared to its external appearance. When it comes to my first test, I can see that it completely prevents fire from igniting to the outside with +E.

Effects of the Invention As explained above, the present invention has a movable side electrode in which a movable electrode lead wire is connected to a snap-action type thermally responsive element having a contact fixed at its tip, and a fixed side electrode, which are provided facing each other. The mount body is housed in a container, and the fixed side electric cover includes a fixed electrode lead, a soluble metal wire attached to the tip of the fixed electrode lead, and a contact fixed to the tip of the soluble metal wire. Therefore, it is possible to prevent the occurrence of arc between the contacts when the current is divided into large currents, so it is a small and extremely high safety 11 product that can avoid ignition outside the container. A thermal protector can be provided.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway view of a thermal protector according to an embodiment of the present invention, and FIG. 2 is a perspective view at 81 of a mount body of the thermal protector. l...Contact, 2...Snap action type thermally responsive element, 4...Movable electrode lead wire, 5
......Movable side pole, 6...Contact, 7...
... Fusible 1 raw metal wire, 8 ... Fixed electrode lead wire, 9 ... Fixed side heavy pole, 10 ... Bead, ll ...・Mount body, 12...
Container, 13...Filling agent.

Claims (1)

[Claims] A mount body in which a movable electrode, in which a movable electrode lead wire is connected to a snap-action thermally responsive element with a contact fixed to its tip, and a fixed electrode are placed in a container, is housed in a container, and the fixed electrode is placed in a container. A thermal protector comprising a fixed electrode lead, a soluble metal wire attached to the tip of the fixed electrode lead, and a contact fixed to the tip of the soluble metal wire.