JPS604116Y2 - Bath buzzer detector - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the improvement of a detector for a bath buzzer, and the object thereof is to provide a detector having a structure capable of properly detecting the temperature of hot water.

Conventionally, this type of detector has been formed into a rod shape, and in order to make it easier to process and to have rust prevention and insulation resistance,
Its main body is made of synthetic resin.

This detector is equipped with a temperature sensor such as a thermistor that detects the temperature of the water in addition to electrodes that detect the water level and dry boiling.

However, temperature sensors such as thermistors that detect water temperature have current constantly flowing through them, so they cannot be mounted exposed outside the detector body and must be buried within the detector body. However, since the detector body is made of synthetic resin, it has low thermal conductivity, and the synthetic resin covering the thermosensor acts as a buffer, making it difficult to detect the appropriate temperature of the water.

For this reason, the thickness of the synthetic resin at the location where the temperature sensor is buried must be made extremely thin to make the response of the temperature sensor steep.

However, simply reducing the thickness of the synthetic resin will result in
It was discovered that the detector could be damaged if accidentally stepped on or dropped on a hard tile surface, making it impractical.

In order to eliminate the above-mentioned drawbacks, this idea was developed by using a synthetic resin detector in which multiple electrodes are arranged vertically and independently to detect water level and empty firing, and a temperature sensor is embedded between the electrodes. It is something.

Examples of this invention will be described below with reference to the drawings.

1 is a rod-shaped synthetic resin main body case consisting of a front case 2 and a rear case 3.Both the front and rear cases 2,
3, the seams around it are glued together with adhesive.

The front case 2 is molded with three electrodes 4.5.6 embedded vertically and independently in the axial direction, and each electrode 4.5. 5.
A recessed portion 7 is formed to surround each electrode in the vicinity where the electrode 6 is exposed on the surface.

Reference numeral 8 denotes a plurality of protrusions that form this recess 7 and divide the electrodes 4.5.6.

Surrounding walls 9, 10, 11 surrounded by walls are formed on the inner surface of the front case 2, corresponding to each electrode 4, 5.6, and a thermistor temperature sensor 12 is installed between the surrounding walls 10, 11. A surrounding wall 13 to be fitted is formed.

Therefore, the temperature sensor 12 is arranged at an intermediate position in the axial direction of the rod-shaped main body case 1.

In addition, each of the surrounding walls 9, 10, 11, 13 has a cord 1 connected to each electrode 4.5.6 and the temperature sensor 12 when assembling the detector.
After soldering 4, the thermosensor 12 is buried in the protrusion 8 between 4, 5, and 6 by filling resin such as epoxy to prevent them from moving.

Further, the wall thickness t of the raised portion 8 of the front case 2 corresponding to the temperature sensor 12 can be made sufficiently thin.

A protrusion 15 formed on the rear case 3 serves to hold down the temperature sensor 12.

A cord 14 is led out from the upper end of the rod-shaped main body case 1 in the axial direction.

As shown in Fig. 2, each electrode 4, 5, 6 and the cord 14 are connected so that the lowest electrode 6 becomes the common electrode of the anode. The main body of the alarm (not shown) is contacted to detect dry heating.

Therefore, according to this invention having the above configuration, the following effects can be obtained.

Since the thermosensor 12 needs to detect changes in water temperature with a sharp response, it should originally come into direct contact with the hot water. This has the contradictory issue of having to be covered and protected in order to provide physical strength.

Therefore, the present invention provides a synthetic resin detector in which a plurality of electrodes 4, 5, 6 are arranged vertically and independently along the axial direction of the main body case 1 in order to detect the water level and dry firing. 4.5. 6 is divided by a plurality of raised parts 8, and the temperature sensor 12 is buried in the raised part 8 at an intermediate position among these raised parts 8, so that the temperature sensor 12 can be easily stepped on by the raised parts 8 on both sides. It is possible to absorb the external force of the detector and protect the intermediate raised part 8. Furthermore, even if the detector is dropped, the cord 14 led out from the detector is led out from the upper end of the main body case 1, so the detector can be Due to this cord 14, the falling direction is restricted, and the cord 14 falls from the side opposite to the lead-out side, that is, from the bottom end, and no impact force is directly applied to the raised part 8 in which the temperature sensor 12 is buried in the intermediate position. It will not be damaged.

Therefore, according to the detector of the present invention, the wall thickness of the part where the thermosensor 12 is buried can be made thinner, and an appropriate temperature of the hot water can be detected.

Furthermore, even if the detector is accidentally stepped on or dropped onto a tile surface, the location where the temperature sensor 12 is buried can be prevented from being damaged or cracked, thereby preventing hot water from entering.

Furthermore, since the temperature sensor 12 is embedded in the raised portion 8, the unique shape of the raised portion 8 allows for a large amount of contact with hot water in all directions, allowing for detection with good response.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of this invention, and FIG. 2 is a front view with the rear case removed. 1... Body case, 4, 5, 6... Electrode, 8... Protuberance, 12... Temperature sensor,
14... Code.

Claims (1)

[Scope of utility model registration request] Multiple electrodes to detect water level and dry firing 4.5.6
In a synthetic resin detector in which the electrodes 4, 5, and 6 are arranged vertically and independently along the axis of the main body case 1, the electrodes 4, 5, 6 are divided by a plurality of raised parts 8, and these raised parts 8
A thermosensor 12 is embedded in a raised portion 8 at an intermediate position, and a cord 14 connected to the electrodes 4, 5.6 and the thermosensor 12 is led out from the upper end of the main body case 1 in the axial direction. vessel.