JPS5836991Y2 - Hot water temperature sensing device in hot water cans - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water temperature sensing device at the hot water edge of a hot water boiler, hot water storage instantaneous water heater, etc.

Conventionally, as shown in FIGS. 1, 2, and 3, a burner 2 that heats a hot water edge 1 is connected to a thermostat 3 that is a hot water temperature sensing device.
controlled by.

This thermostat 3 consists of a heat-sensitive tube 5 whose most part is inserted into the water chamber 4 of the hot water edge 1 and a thermistor 6 mounted inside the heat-sensitive tube 5.
It is connected to.

Reference numeral 9 denotes a connector for facilitating connection of the cord 7 when attaching and detaching the burner 2.

10 is a ground wire. However, in the one shown in Fig. 2, the thermistor 6 and the heat-sensitive tube 5 are not in contact and the thermistor 6 detects the ambient temperature inside the heat-sensitive tube 5 and increases or decreases its resistance value. It did not respond quickly to changes in the water temperature in room 4, and its thermal sensitivity was poor.

Therefore, if the tip a of the thermistor cord is fixed to the inner wall of the tip of the heat-sensitive tube 5 to directly detect the surface temperature of the heat-sensitive tube 5 as shown in FIG. It is necessary to attach the wire 10 to one hot water edge using screws 10, etc., and when it becomes necessary to remove the burner 2 to which the burner control device 8 is fixed from the hot water edge, it is necessary to connect not only the connector 9 but also the ground wire 10. It was a pain because I had to remove it.

The present invention eliminates this difficulty, and will be explained below based on the embodiment shown in FIG.

In the figure, reference numeral 12 denotes a ground wire whose one end is connected to the connector 9 and the other end is attached to the outer wall of the heat-sensitive tube 5 outside the hot water edge 1.

Therefore, when it becomes necessary to remove the burner 2 from the hot water edge 1 for maintenance inspection, etc., the connector 9 can be removed. Once attached, the ground wire 12 is also attached, and there is no need to separately attach the ground wire 12 to the hot water frame, making it easy to attach and detach the burner 2.

As described above, the present invention fixes the tip of the thermistor cord to the inner wall of the tip of the heat-sensitive tube inserted into the ice chamber at the edge of the hot water, connects the other end of the thermistor cord to the connector, connects one end of the ground wire to the connector, and connects the other end of the thermistor cord to the connector. Since it is attached to the outer wall of the heat-sensitive tube outside the hot water can, the heat-sensitive response of the hot water temperature sensing device is not only improved, but the burner is also easy to attach and detach, and it also prevents accidents caused by incorrect or forgotten connection of the ground wire. It can be prevented.

In addition, in this invention, one end of the ground wire is connected to the connector and the other end is attached to the outer wall of the heat-sensitive tube outside the hot water container, so simply inserting the heat-sensitive tube into the water chamber completes the ground wiring and connects the other end to the heat-sensitive tube. It does not require any grounding fittings such as, and is easy to assemble and inexpensive, and has great practical effects.

[Brief explanation of drawings]

FIG. 1 is an overall view of a conventional example, FIGS. 2 and 3 are enlarged views of main parts of the conventional example, and FIG. 4 is an enlarged view of main parts of an embodiment of the present invention. 1...Hot water can, 2...Burner, 4...
...Water chamber, 5...Heat tube, 6...
Thermistor, 7... Code, 8... Burner control device, 9... Connector, 12...
···ground wire.

Claims (1)

[Scope of utility model registration request] The burner control device fixed to the burner and the thermistor installed in the heat-sensitive tube inserted into the ice chamber are connected by a cord via the connector, the tip of the thermistor cord is fixed to the inner wall of the tip of the heat-sensitive tube, and the other end of the thermistor cord is connected to the connector. A hot water temperature sensing device at a hot water edge, characterized in that one end of a ground wire is connected to a connector and the other end is attached to an outer wall of a heat-sensitive tube outside a hot water can.