JP3003939B2 - Pump device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention automatically starts operation when a faucet is opened and closed.
The present invention relates to a pump device for stopping operation, and more particularly to a pump device for supplying water by using energy without waste.

[Conventional technology]

Generally, a conventional pump device starts and stops operation by a pressure switch or a combination of a pressure switch and a flow rate switch.

Thus, the pressure switch opens and closes the contact by the difference between the internal pressure of the pump device and the spring pressure. However, it is difficult to reduce the differential between the opening pressure and the closing pressure from a mechanical point of view. The pressure adjustment range was limited because of the force. Also, in order to automatically operate the pump device, the height up to the maximum faucet, the so-called push-up height, is slightly smaller than the closing pressure of the pressure switch. Is not reached).

From the above, as shown in FIG. 4, for example, a pump device having a shutoff total head Ht _max is installed at a height from the pump device to the water surface, that is, at a so-called suction height of Hs. If the pressure switches are closed pressure H _ON and open pressure H _OFF , the range between H _ON and H _OFF is the range in which the pressure can be raised, and the lifting height is H _ON . Then, even if the same pump as described above is installed at the suction height Hs ', the range in which the pump can be lifted and the lifting height are the same, and in the case of the above-described example, the pump has the suction height Hs'. If it is installed at the point, the energy between Hs and Hs' is wasted.

A conventional technique for detecting the flow rate of a pump device in the form of a pressure is described in, for example, Japanese Patent Publication No. 1-29998.

[Problems to be solved by the invention]

That is, according to the prior art described above, even if the suction height changes, the push-up height is fixed by the closing pressure of the pressure switch, so that there is a problem that the pump is used in a state where the capacity of the pump is not sufficiently exhibited. Was.

An object of the present invention is to provide a pump having a fixed capacity in a place having a different suction height without using a pressure switch conventionally used in a general-type pump device, and according to the suction height. An object of the present invention is to provide a pump device capable of automatically determining a pushing-up height, fully utilizing the capacity of a pump, and eliminating waste of energy.

[Means for solving the problem]

A first feature of the present invention is that in a pump device that automatically starts and stops with opening and closing of a faucet, a pressure sensor that detects a pressure in the pump device, an external terminal that inputs a suction height, An operation control device that performs operation control of operation start and operation stop of the pump head is provided, and the suction height Hs is input from the external terminal according to the actual use at the time of installation of the pump device, and corresponding to the input value. The operation start pressure H _ON which is the push-up height stored in advance in the microcomputer is determined, and the detected value of the pressure sensor for the suction height selected by the external terminal is lower than the operation start pressure H _ON . Then, the operation of the pump head is started, and operation control for issuing a stop command when the pressure H _OFF becomes higher than the operation start pressure H _ON is performed.

Further, a second feature of the present invention is that in a pump device which automatically starts / stops in response to opening / closing of a faucet, a pressure sensor for detecting a pressure in the pump device, and a start / stop operation of a pump head. An operation control device for performing operation control, wherein a discharge pressure value Hd in a shutoff state is detected by the pressure sensor, and an operation start pressure that is a push-up height is provided.
H _ON , the operation stop pressure H _OFF is calculated based on the coefficient of Hd> H _OFF > H _ON, and when the pressure H _ON which is smaller than the discharge pressure value Hd in the shutoff state is reached, a pump head operation start command is output. However, the present invention is configured to perform operation control for outputting a pump head operation stop command when a pressure H _OFF greater than H _ON is reached at a pressure less than Hd.

[Action]

According to the present invention, the pumping height is input from an external terminal in accordance with the actual use at the time of installation of the pump device, or the sucking height is automatically determined from the discharge pressure value in the closed state, and the conventional pump device Even if a pump with a fixed capacity is installed in a place with a different suction height without using the pressure switch used in It can be used to its fullest extent, eliminating waste of energy.

〔Example〕

Hereinafter, the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a perspective view showing an embodiment of a pump device according to the present invention, and FIG. 2 is a perspective view of the pump device shown in FIG. FIG. 3 is a block circuit diagram, and FIG. 3 is a water volume-pressure characteristic diagram of the pump device shown in FIG.

In FIG. 1, on the common bed 1 of the pump device,
Two pump heads 2, 3 are mounted, and each pump head 2, 3 is connected to a water tank 6 via suction pipes 4, 5. Downstream sides of the pump heads 2 and 3 are connected to respective faucets 9 via a junction pipe 7 and a discharge pipe 8. A pressure sensor 10 and a pressure tank 11 are attached to the upper part of the junction pipe 7. Further, on the common bed 1, a control box 12 is attached.

As shown in FIG. 2, the control box 12 has a terminal block 15 for connecting the power supply 13 and the motor 14, a switch 16 for opening and closing the circuit of the motor 14, and a microcomputer (FIG. 2) for determining and outputting based on various inputs. Microcomputer board 17 (not shown) mounted
And so on. The input information to the microcomputer-equipped substrate 17 includes a pressure sensor 10 for inputting the pressure in the pump substantially linearly, a current transformer 18 for inputting the operation status of the pump via a current flowing through the motor 14, and a suction height. There is an external terminal 19 that can be set manually, and the output information from the board with microcomputer 17 includes a display lamp that determines the pump operation status and displays abnormalities such as overcurrent and idling.
20 and an on / off switch 16 for opening and closing the circuit of the motor 14.The pumping height Hs is input from the external terminal 19 in accordance with the actual use at the time of installation of the pump device. _Then , H _ON1 , that is, the operation start pressure is automatically determined and the operation is on standby.

This will be described in detail with reference to FIG.
If it is Hs ₁ wicking height of a few pumping device installation situation, by matching the external terminals (reference numeral 19 of FIG. 2) to Hs _1, incorporated in the microcomputer software in accordance with Hs ₁ value And the operation start pressure H _ON1 value, which is the push-up height of the two pump heads 2 and 3, is automatically set within the range of the total deadline Ht _max- Hs ₁ , and the pump is set to a value larger than H _ON1. The head operation stop pressure H _OFF1 is set. Also, H _ON1 and H _OFF1
Parallel operation releasing pressure H _{P OFF1} in between, parallel operation start pressure H _{P ON1} value H _ON1 smaller value is set.

On the other hand, if the suction height is set to Hs ₂ which is smaller by H due to the water level fluctuation, it is considered that the pump position has shifted to the Hs ₂ value, and the H of the two pump heads 2 and 3 is changed.
_{ON2, H OFF2, H P ON2} , H P OFF2 each H _ON1, H _OFF1, H _P
ON1, the H only higher than the H _{P OFF1.}

As described above, Hs ₁ or Hs ₂ from the external terminal 19 is input to the two pumps heads 2 and 3 in accordance with the actual use of wicking height, the operation start pressure H _ON1 or H _ON2, shutdown pressure H
_OFF1 or H _OFF2 , Parallel operation release pressure H _{P OFF1} or H _P
Pump _{apparatus OFF2} is determined respectively, pump pressure is reduced by opening the faucet 9 starts reaches and driving the H _ON1 or H _ON2, then the internal pressure is raised by closing the faucet 9, H Automatically stops when _OFF1 or H _OFF2 is reached. In addition, after the start of operation, the water usage further increased and _HON1 or _HON1
Inner pressure than _ON2 decreases, reaches the H _{P ON1} or H _{P ON2,} parallel operation start command is issued, the pump head 2,
3 Both perform operation.

As described above, according to the present embodiment, by switching the external terminal 19, the suction height according to the actual use is input, and the push height according to the suction height is automatically set. In addition, efficient pump operation without energy loss can be implemented by fully utilizing the capacity of the pump.

Note that the shut-off operation is performed at the beginning of the operation when the pump is installed, and if the normal pump operation is started, the shut-off operation is performed each time the pump is stopped, and the discharge pressure value Hd ₁ = Htmax−Hs _{1 in the} shut-off state. Or, Hd ₂ = Htmax−Hs ₂ is detected by the pressure sensor 10 and input to the microcomputer-equipped board 17,
The operation start pressure _{H ON1, H ON2, Hd 1} > H OFF1> H P OFF1> H
_ON1> H _PON1 or _{Hd 2> H OFF2> H P} OFF2> H ON2> H P ON2
If it is calculated and automatically set based on the coefficient to be set, in addition to the same effect as above, the setting of the operation start pressure H _ON which is the push-up height based on the suction height Hs is automatically set. Can be.

The pump which is commonly used for general, that is, when carrying out the present invention the pump head to the pump with only one, the H _{P ON1} or H _{P ON2,} H _{P OFF1} or H _P
Of course, setting of _OFF2 is unnecessary.

〔The invention's effect〕

According to the present invention, even if a pump with a fixed capacity is installed in a place having a different suction height without using a pressure switch conventionally used in a general type pump device, the pump can be adjusted according to the suction height. The push-up height can be automatically determined, and the capacity of the pump can be fully utilized, and waste of energy can be eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the pump device according to the present invention, FIG. 2 is a block circuit diagram of the pump device shown in FIG. 1, and FIG. Pressure characteristic diagram, FIG. 4 is a water amount-pressure characteristic diagram of the conventional pump device. 2, 3 Pump head, 10 Pressure sensor, 12 Control box, 17 Microcomputer board, 19 External terminals.

Continued on the front page (72) Inventor Yasushi Shinko 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Plant of Hitachi, Ltd. (72) Inventor Toru Ozawa 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Plant of Hitachi, Ltd. (56) References Japanese Utility Model Showa 60-175896 (JP, U) Japanese Utility Model Showa 60-87394 (JP, U) Japanese Utility Model Showa 59-174608 (JP, U) Japanese Utility Model Showa 55- 6469 (JP, U)

Claims (2)

(57) [Claims] 1. A pump device which automatically starts and stops when a faucet is opened and closed, a pressure sensor for detecting a pressure in the pump device, an external terminal for inputting a suction height, and operation of a pump head. An operation control device for performing start / stop operation control is provided, and the suction height Hs is input from the external terminal according to the actual use condition when the pump device is installed, and is stored in the microcomputer in advance in accordance with the input value. The operation start pressure H _ON which is the push-up height that has been set is determined, and the detected value of the pressure sensor for the suction height selected by the external terminal is the operation start pressure.
A pump device, wherein the pump device is configured to start operation of the pump head when H _ON or lower, and to perform operation control for issuing a stop command when the pressure H _OFF becomes higher than the operation start pressure H _ON . 2. A pump device that automatically starts and stops when a faucet is opened and closed. A pressure sensor that detects a pressure in the pump device, and an operation control that starts and stops the operation of a pump head. A coefficient for detecting the discharge pressure value Hd in the shut- _off state by the pressure sensor, and setting the operation start pressure H _ON and the operation stop pressure H _OFF which are the push-up heights as Hd> H _OFF > H _ON. Is calculated based on
When the pressure H _ON which is smaller than the discharge pressure value Hd in the cutoff state is reached, a pump head operation start command is output, and when the pressure H _OFF is larger than H _{ON at a} pressure smaller than H _d , a pump head operation stop command is issued. A pump device having a configuration for performing operation control for outputting.