JPS587567Y2 - Pressure-responsive switch - Google Patents

Description

[Detailed Description of the Invention] The present invention is directed to a pressure-responsive switch used for detecting empty heating of a bathtub, for example, and is intended to reduce costs by reducing the number of parts.

Figures 1 and 2 show a conventional pressure-responsive switch installed for detecting empty heating of a bathtub. In other words, 1 is a heat exchanger heated by a burner 2, and both ends of the heat exchanger are connected to a bathtub 3. The upper and lower loading loops 4 and 5 are connected.

The pressure-responsive switch 6 has a configuration in which a diaphragm 7 that responds to the pressure of hot water flowing through the upper stack ring 4 and a switch 8 are linked by a connecting rod 9, and the switch 8 is connected to the circuit of the solenoid valve 10. be.

Under normal conditions, the diaphragm 7 is displaced to the right by the action of water pressure, turning on the switch 8 via the connecting rod 9. Therefore, when the power is turned on, the solenoid valve 10 opens, allowing the burner 2 to burn. It is.

Furthermore, when the amount of water falls below a predetermined level, the diaphragm 7 can no longer turn on the switch 8.

Therefore, by turning off the switch 8, the solenoid valve 10
is closed, and combustion of the burner 2 is stopped.

By the way, the above-mentioned pressure-responsive device requires a connecting rod 9 as a linking member, and must also provide guide means and attachment means for the rod, which inevitably leads to a complicated structure, which directly leads to higher costs. was.

Further, due to malfunction of the connecting rod 9, there was a problem that accurate pressure-responsive opening and closing could not be performed.

The present invention solves these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In FIG. 3, reference numeral 11 denotes a main body, which is divided by a partition wall 13 having a through hole 12 in the center into a pressure receiving space 14 on one side and a switch storage space 15 on the other side.

16 is a pressure-responsive membrane made of a material that contracts and expands elastically, such as a rubber membrane, which is covered in the pressure-receiving space 14; 17 is a switch provided in the switch storage chamber 15, the switch 18 of which is inserted into the through hole 12; Compatible.

In the above configuration, the stress-responsive membrane 16 is located on the pressure source side.

Then, when the pressure of the pressure source is high, the pressure responsive membrane 16 is deformed and its central portion bulges into the through hole 12.

Therefore, the switch 17 uses its expanded output to cause the switch 18 to
is turned ON when pressed.

Further, when the pressure is low, the amount of expansion into the through hole 12 is small and the switch 17 is disconnected from the switch 18, so the switch 17 is turned off.
It is to be used as FF.

As explained above, in the present invention, since the switch is directly actuated by the pressure-responsive membrane, the structure can be simplified compared to conventional products, and an inexpensive pressure-responsive switch can be provided.

Furthermore, since a portion of the pressure responsive membrane protrudes into the through hole of the partition wall, the switch can be opened and closed accurately in response to pressure fluctuations in the pressure source, providing excellent practical effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a bathtub, FIG. 2 is a cross-sectional view of a conventional pressure-responsive switch, and FIG. 3 is a cross-sectional view of a pressure-responsive switch according to an embodiment of the present invention. 11...Main body, 12...Through hole, 13.
...Bulkhead, 14...Pressure receiving space, 15...
... Switch storage space, 16 ... Pressure responsive membrane, 17 ... Switch, 18 ... Switch.

Claims (1)

[Scope of utility model registration request] A partition wall having a through hole is formed between the pressure receiving space of the main body and the switch storage space, and the pressure receiving space is covered with an elastically deformable pressure responsive membrane, and a part of the pressure responsive membrane is placed in the through hole. A pressure-responsive switch comprising a switch which bulges out and has an opening/closing hole located in the switch housing space in correspondence with the through hole.