JPS6319715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic operation device for a pump in which a float-type flow rate switch is used to start and stop the pump, and more specifically, starting is performed by pushing up a float using a diaphragm that is displaced by pressure, and stopping is performed by pushing up a float using a diaphragm that is displaced by pressure. This relates to an automatic operation device for a pump that also performs pressure detection using its own weight.

Conventionally, automatic pump operation devices that allow continuous operation even when the faucet is turned off have been equipped with separate pressure switches and flow rate switches to supply water at a constant pressure. When the water pressure is low, the pressure switch starts the pump operation, the flow rate switch detects the water flow generated by the pump operation, and even if the pressure becomes high and the pressure switch is turned off, the flow rate switch is set to OFF. The pump continues to operate until the specified value is reached, supplying water at a constant water pressure. However, in this case, the pressure switch and flow rate switch must be installed separately, resulting in a complicated structure and increased costs.

In view of the above circumstances, the present invention provides a pump automatic operation device with a simple configuration.

That is, in the present invention, a diaphragm that is displaced by pressure is provided in the flow rate switch, and when the pressure is below a certain level, the displacement of the diaphragm is expanded using a lever to push up the float in the flow rate switch and activate the reed switch. This is an automatic operation device for a flow rate switch type pump that has a configuration that does not affect the float even if the diaphragm is displaced in the opposite direction.

Hereinafter, the present invention will be explained with reference to drawings of embodiments.

Reference numeral 1 denotes a flow rate switch body having a reed switch 2 on the upper part, and a float 3 disposed at the upper center of the flow rate switch body 1 is positioned directly below the reed switch 2 with a float guide 4.
The reed switch 2 is actuated by the proximity of a magnet 5 provided on the top surface of the reed switch 2. Reference numeral 6 denotes a diaphragm which is provided on the side of the flow path of the flow switch body 1 and has a spring 7 for setting a constant pressure on the back. The pin 9 is brought into contact with the proximal side of a hook-shaped lever 10 pivotally mounted on the side of the flow rate switch main body 1, and the tip pressing portion 10a of the lever 10 is rotated to the lower surface of the float 3 through the flow hole portion 1a. The automatic driving device 11 is constructed as a whole. The electric circuit in this case is as shown in FIG. 3. When the reed switch 2 is operating, the relay coil 12 is energized, the relay 13 is operated, and the pump 14 is operated.

To explain this operation now, first, when starting the pump 14, as shown in FIG. The pivot 8 magnifies and transmits the displacement of the diaphragm 6 to the lever 10, and the lever 10 is rotated about the support pin 9 as a fulcrum.
At point a, the float 3 is pushed up, and the reed switch 2 is turned on by the magnet 5 built into the float 3, and the pump 14 is operated.

Here, when the water pressure increases by squeezing the faucet, the diaphragm 6 is displaced in a direction (outward) that compresses the spring 7, and the pivot 8 attached to the diaphragm 6 separates from the lever 10, causing the lever 10 hangs down due to its own weight, and the tip pressing part 10a separates from the float 3. However, in this case, the float 3 maintains a so-called floating state as it is pushed up by the flow of the high-pressure water itself. The magnet 5 of the float 3 is actuated, the reed switch 2 remains in the ON state, and the pump 14 continues to operate (see Fig. 4B).

If the faucet is further closed and the water flow drops below the set flow rate, the float 3 will sink along the float guide 4 due to its own weight and sit in the flow hole 1a, as shown in Fig. 4C. The reed switch 2 activated by the float 3 is turned off and the pump 14 is stopped.

Next, when the water pressure decreases in this state, the diaphragm 6 displaces again and pushes up the float 3 via the lever 10, returning the pump to the pump starting state shown in FIG. 4A.

As mentioned above, the pump automatic operation device of the present invention has the following features:
The float of the float type flow rate switch is operated by a lever driven by a diaphragm disposed on the side that is displaced by pressure and the upward force of the water flow, and the reed switch at the top is turned on and off as the float moves up and down.
With this configuration, the pump can be started and stopped automatically. Furthermore, since the diaphragm portion in this case is integrated into the side of the flow path of the flow rate switch body, the structure is not only simplified, but also the body as a whole becomes compact and can be provided at low cost. Further, since the displacement of the diaphragm is transmitted to the float in an enlarged manner using a lever, the float and the diaphragm themselves can be used for a long time without causing malfunction or failure.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a vertical sectional side view of the main part, FIG. 2 is a front view of the same, FIG. 3 is an electric circuit diagram, and FIGS. 4A, B, and C show operating states. FIG. 1...Flow rate switch body, 2...Reed switch, 3...Float, 5...Magnet, 6...
Diaphragm, 7...spring, 10...lever, 14...pump.

Claims (1)

[Claims] 1 A diaphragm that is displaced by pressure is provided on the side of the flow rate switch body, which has a reed switch on the top that controls the operation of the pump and a float with a magnet that operates the reed switch on the bottom, and a lever that is driven by the diaphragm. An automatic operation device for a pump characterized by having its end facing the bottom surface of the float, pushing up the float with a lever below a certain pressure, and pushing it up with a water flow above a certain pressure.