JPS59110897A - Water feed apparatus having pressure tank - Google Patents

Abstract

PURPOSE:In a water feed apparatus assembled with a timer mechanism to save power consumption by blocking operation through a timer signal when interval of signal necessary for operation of pump exceeds over setting time of timer mechanism. CONSTITUTION:When pressure in a pressure tank T is sufficiently high and the pump is stopping, a faucet at the demand side is opened to lower pressure in said tank T. Upon reaching to first pressure P1, a contact PS' in a pressure switch PS will close to conduct a transistor Tr thus to energize a relay SR. Consequently contact in an operational switch M will close to operate the pump P. If the pressure at delivery side reaches to second pressure P2 within setting time (t) of a timer element Ti through operation of said pump P, said pump P will continue operation upto expiration of setting time. If interval of operating signal S1 for pump has exceeded over setting time, it is controlled to block operation through timer signal.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a water supply device having a pressure tank, and particularly to a water supply device having a pressure tank, and in particular, it is possible to save the operating power cost of the pump by selecting a small volume of the pressure tank. This relates to the configuration of a water supply device that can be used.

[Prior art]

Downsizing of water supply devices with pressure tanks has been progressing in recent years. J61C is most effective in reducing the size of the water supply device by reducing the size of the pressure tank. However, if the volume of the pressure tank is reduced, the amount of water stored there will be reduced, so in a water supply system that repeats ON-OFF operation of the pump to maintain the discharge pressure of the pump within an approximately constant pressure range, the frequency of starting the pump is reduced. Value ζ high (Naru worry ≠: Yes.

If the starting temperature of the pump is high (if the motor that drives the pump ≠; it may overheat or adversely affect the power supply of the motor), the pump must be operated for a certain period of time in order to suppress the pump starting temperature. It has been proposed that a timer mechanism is used to supply water to the pump.In this kind of water supply system, the timer mechanism is activated at the same time as the pump starts operating, so that even if the pressure on the discharge side rises to the stop pressure, When setting the timer and mechanism, the pump is operated continuously until 1'7fI runs out.Also, after the pump has started operating, the timer mechanism is activated when the pressure on the discharge side rises to the upper limit pressure. There has also been proposed a system in which the pump continues to operate until the set time of this timer mechanism has elapsed.

If such a timer a mechanism is incorporated, each time pump 2 is started, the timer device #≠ works.Since the pump will always operate for a certain period of time determined by the timer mechanism, the frequency of starting the pump will be sufficiently suppressed. I can go. However, in such a device, when the amount of water demand becomes extremely small, the pump continues to operate longer than necessary. For example, an apartment.

In apartments, buildings, etc., extremely small amounts of water are used sporadically for flushing toilets and other purposes at night, so there is no predisposing factor that would increase the number of pump starts by ≠2 (
However, in conventional water supply systems, the pump continues to operate for the time set by the timer mechanism. When the amount of water becomes extremely low, wasteful operation of the pump becomes noticeable and the operating power cost of the pump increases.

[Purpose of the invention]

Therefore, the present invention provides a water supply device having a pressure tank incorporating a timer mechanism that can continue proper operation even when the amount of water is small.

[Summary of the invention]

°　3　.

The present invention consists of a pump 7, a pressure tank connected to the discharge side of the pump, and a supply pressure cuff I connected to the discharge side of the pump on the discharge side: supply water a' state detection means that issues a signal that the pump needs to be operated when the pressure decreases. and a timer means that emits a timer signal for a certain period of time from when the pump is stopped, and the operation required signal and the timer signal are input. Provide a pump operation command means that issues an operation command signal and issues a pump operation command until both the timer signal and the operation required signal are input when the operation required signal is input while the timer signal is being input. Accordingly, the present invention provides a water supply device having a pressure tank configured so that continuous operation using only a timer does not occur when the amount of water demand becomes extremely small.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained with reference to FIGS. 1 to 4. Fig. 1 is a companion project drawing explaining the mechanical configuration of the water supply system, and is a P pump.The following items are connected to the discharge side of this pump P.The CHV is Check valve, 5LV-1,3LV
-2 is a gate valve, T is a pressure tank having an air reservoir, and a pressure switch for detecting the water supply device # on the discharge side of the PS pump, which is connected to the pressure tank T in this example. This pressure kasui so 4
-PS Operates in the following pressure ranges. That is, in the pump operating characteristic diagram shown in Fig. 2, in which the horizontal axis represents the water amount Q and the vertical axis represents the pressure H, the pressure
Pressure on the pump discharge side ≠ 2 When the pressure drops to the first pressure P, (lower limit pressure), it becomes the first state and closes. When the pressure P of 2 (upper limit pressure) is recovered, it opens in a second state different from the state of tal, and its contact PS' closes at the first pressure P, and returns to the second pressure P. , a signal S indicating that the pump P needs to be operated is issued until the pump P is opened. FIG. A timer means that emits a timer signal S for a time sufficient to suppress the starting frequency of the pump P below the cut-off operation time of the pump P from the time of stoppage of the pump P. is input, and when the operation required signal is input alone, the operation command signal S is issued, and when the timer signal S is input, the operation command signal S is issued. , a pump operation command means that issues an operation command signal for the pump P until both the timer signal S and the operation necessary signal S are no longer input, when inputting the operation command signal S to the pump P This is a pump drive circuit connected to the connected electric motor 'a' for driving this.

To explain all of these control circuits in more detail, Vca is a low-voltage DC power supply for control, PS' is a pressure
It is a contact point, and this contact point is closed and 7! L level operation required signal S, -AZ generation t, 6. NOT, -NOT
, is a NOT gate that inverts the signal, OR is an OR gate for logical sum, AND is an AND gate for logical product), NA
ND is also a Nant gate, R1 to R6 are resistors, Tr is a transistor, and SR is an operation command signal S from transistor Tr.

A semiconductor or electromagnetic saw that connects the operation switch M of the electric motor for driving the pump P to the power supply G when input is input.
(2) is an integrating circuit consisting of resistors R4 and R and capacitor C1, and T1 is a variable resistor VR.

There is a timer regulator C which can be timed by a capacitor C1. To explain further, the operation necessary signal S at the L level is converted into a signal at the inverted LH level by the signal S at the L level, and then inputted to the base of the Rin sister Tr via the Ogate gate ORe.

When all H-level signals are input to transistor 4Tr, an L-level pump operation command signal S is output from the collector of transistor Tr, and upon receiving this L-level signal, relay SR switches to the operation switch. Empower M. Also,
Owagame) The H level signal from OR is notgame-1-
After being input to NOT and inverted, it is input to the integrating circuit and further inverted both times by NOT and VC. When the fc is connected, the Nante gate NAN inputs both signals of the soto gate NOT and the not gate NOT.
From D, an L level signal with a constant width is output at the same time as the H level signal of OR (or game) ≠ 2 disappears.

When the NAND signal at L level is input to the input terminal IN of timer element T1, the timer element T1's output terminal OUT becomes H level for a certain period of time set by the resistor VR and capacitor +C1. Emit a signal S. Furthermore, γ (game) AND is the timer signal S, and OR (game) is an H level signal ≠:
When input simultaneously, an H level signal is output to one input terminal of the OR game.

Next, the operation of the water supply device will be explained with reference to the time chart shown in FIG.

The dotted symbols on the time hands correspond to the signal waveforms at the positions of the same symbols in the control circuit. First, the variable resistor VR and the capacitor C1 are adjusted so that the set time t6 of the timer element T1 is equal to or less than the cut-off operation time of the pump P.

set to a period long enough to reduce the frequency of startups, such as a few minutes. Now, for convenience, the pressure inside the pressure tank T is 90 minutes high (
It is assumed that the pump P is stopped.

When the water faucet on the consumer side is opened with such a face contact, the pressure value in the pressure tank T drops, and when it reaches the first pressure P, the pressure switch #-PS contact P S'9 closes. , the operation necessary signal SI is generated, and the transistor Tr becomes conductive.

This energizes the relay SRM, and when the contact of the operation switch M closes, the electric motor connected to the pump starts operating the pump P.
When water is supplied fC, the pressure in the pressure tank T recovers as the amount of water used decreases, and reaches the second pressure P.
Pressure switch+ps contact PS'≠; open, transistor Tr.

Relay SR and operation switch M are deenergized and pump P stops. At this time, the signal in the control circuit B and the control circuit changes from H level to L level. Therefore, when this signal ≠ 2 is input to the integrator circuit through the ) soto gate NOT, i, the integrator circuit calculates the falling and rising values z of the signal as shown by C on the time scale, respectively. △t,
, Δt, is emitted. As a result, no.
Soto gate NGT, as shown in time chart C, the rise and rise of the signal are respectively △tl
.

A signal t delayed from the output signal of the OR gate OR by Δt.
: To be taken out. Furthermore, these signals are
It is further processed by NAND, and the output signal of OR is changed to the ALL level, which is then input to the timer element T1 as an L level trigger signal with a constant width. In other words, each time the output ysZL level of the off-gate OR changes, in other words, each time the operation of the pump P stops, the L value increases by Δt.
A level signal≠2 is input to the timer element Ti. As a result, the timer element T1 receives the negative signal of the L level signal.
It is triggered by the timer and outputs an H level signal to the timer as shown by F for only the time Ht. Here, since the signal at point H in the control circuit is the logical product of the timer signal S from the tend gate AND and the feed pass signal from the OR gate OR, at the initial stage, the timer signal S and the signal at the sparrow H level are the same. The pump PFi will not start operating unless the operation required signal S1 is input.Continuing the explanation further, if the pressure in the pressure tank R falls to the first pressure P again within the set time of the timer element T1, the pump PFi will start operating. Start driving. If the pressure on the discharge side ≠ z second pressure P is recovered by operating the pump P within the time set by the timer element T1, the operation of Bo>fp continues until the time t set by the timer element T1 is completed. . That is, pump P≠; time t elapsed before starting
, the operation of the pump P is continued for the remaining time Hta of the set time t.

Ic2: Demand water, fl≠: Relatively large amount (Pressure switch PS≠; If the water supply is frequently opened and closed, the pressure switch + PS operation required signal S1 and timer signal S are The operation command signal S of the pump P is combined at any time, and the start of the pump P is suppressed.If the demand water volume is extremely low, the pressure control signal S is issued.
- Since the opening operation period t of the PS becomes considerably long and exceeds the set time of the timer element T1, the timer signals S, iL are already present at the stage when the operation required signal SI of the pressure cutter saw f-PS is input. The level is 011°. Therefore, in this case, the timer signal S
, [Extended operation does not occur, and the M rotation fHtrT is performed only when the operation required signal S□ is input by opening and closing the pump P pressure switch 4-PS [,]. In this way, when the water demand is extremely low, for example at night, the pump Pff must be
This means that only the minimum amount of operation is required, and there is no need for unnecessary operation compared to the conventional water supply device which operates using a timer device ItK.

Next, the embodiment shown in FIGS. 5 and 6 will be described.

In the embodiment described above, if a pump with a characteristic of little pressure change due to water intake is used, it becomes difficult to monitor the water supply a' of the water supply device with only the pressure gauge. That is, in this embodiment, from when the pressure switch 4-PS attached to the discharge side VC of the pump P is closed, the flow rate switch f-FS opens ('! The signals S and Z that require pump operation are added to the training control circuit.7'L5f To explain in detail, the pressure filter Sochi PS attached to the Tsujika tank T.
is closed at a pressure P of JMl, and opened at a second pressure P higher than this. So-hand FS closes with the first flow iQ, n,
The 217th) lit (stop a) Q, which is closer to the cut-off flow rate rC, opens at m.

At this time, on the pump operating characteristic diagram shown in Fig. 5, the first pressure P (low pressure) of the pressure SW 4-p S corresponds to the first flow rate Qn of the flow rate SW 4-FS. Also, set the second pressure P of pressure SW + PS,
The Fi flow rate is set below the pressure corresponding to the second flow rate Q, m of the flow rate suite +Ii'S. The signals of the Takasui SO4, PS, and flow rate switch FS set in this manner are processed as follows and input to the control circuit. In other words, as shown in Fig. 6, the L level signal generated by closing the pressure switch 4-PS contact P Gates OR and VC are sent. In addition, the flow rate switch 4-F
The L level signal generated by closing the S contact FSl≠2 is reversed by the NOT gate and then sent to the tend gate AND. anime game) AN
D, #-j 1st game) OR, and NOT gate NOT,
In response to the signal, the pump operation necessary signals S and f are issued.

The circuit configuration after the off-gate OR is similar to the embodiment described above.

The operation of the water supply device constructed in this manner will be described next. First, the amount of water demand≠2 is extremely small (C2nd water t
Also, the pressure on the discharge side is closed, and the pressure on the discharge side is A: I! When the pressure P decreases to 1, the tangent of this, f
iPS' is also closed. Therefore and gate AND
The output signal of , becomes H level, and is inputted to the already explained control circuit as the operation required signal S1. By inputting this operation necessary signal S,≠;, the control circuit starts operating the threading ribbon fP as described above. After the pump P≠ is operated, as the demand water value decreases, the pressure in the pressure tank T will recover, and the demand water volume will also gradually decrease (here, O7 game) OR, Since the fee F switch signal of the tend gate AND is inputted to the input side, the Fi operation necessary signal S, does not go to the L level just by opening the cap of the pressure switch F-PS's concubine point P S'.

That is, when the demand water t becomes less than the second flow rate Q, m and the contact point FS' of the flow rate switch-4-FS opens following the @ point PS', the operation required signal S, the level lower than the H level V.
It is something that changes the level to q. Note that the timer element T1
, and other operations are the same as those of the embodiments already described, so their explanation will be omitted.

Accordingly, when configuring a water supply system using a pump with operating characteristics that are less prone to pressure facilitation, it is possible to
S is the only signal S that requires operation of pump P.

Sometimes it's hard to get it. In particular, it is difficult to set the pressure (stop pressure) @2 (due to the operation error of the pressure switch 4-PS, the pressure corresponding to the stop flow rate near the pump's cut-off flow rate cannot be determined accurately). On the wood flow side, by combining the flow rate switch 4- with the switch, it is possible to reliably set the discharge flow rate when the bonder is stopped at a value close to the cut-off flow rate.

゛ 15゜In other words, on the wood flow side, the pressure on the discharge side is increased and the pump is stopped after sufficient water has been stored in the pressure tank T, which reduces the utilization rate of the pressure tank T. can be raised.

As explained above, on the constant actual flow side, the pressure tank T is equipped with a pressure filter +PS, and this pressure filter 4-P
It can be installed anywhere on the water supply pipe system on the S pump discharge side. In addition, as a water supply a' state detection means that detects zero demand on the discharge side of the pump and issues a signal that the pump needs to be operated, we will also introduce the Pressure Suits-F-PS, or in addition to this, a system that incorporates a flow rate Sui-So 1,000 FSfti. I explained, but
In addition, a water level gauge is installed in the pressure tank T to detect the water level, and when the water level in the pressure tank T ≠ drops to a predetermined lower limit water level, a signal to operate the pump is issued, and when the water level reaches the upper limit water level ≠ 2 The operation required signal continues until recovery (it is possible to perform similar water supply control even if the configuration is configured as follows).Also, in the embodiment, when opening/closing operations are performed, the pressure and flow rate switch is used. However, a similar control device can be constructed even if the opening/closing relationship is reversed or by using a detector capable of obtaining a continuous 16° fcl analog signal.

Furthermore, in the embodiment, the control circuit is constructed of an 8-logic circuit. Such control can also be performed using a microcomputer.

Further examples of this will be explained with reference to FIG. M1, FIG. 2, FIG. 7, and FIG. In FIG.
E, interface 1101, power supply, etc. In this case, the program shown in FIG. 8≠2 is stored in the memory MEIC in advance.

Friend, in something like this, it is necessary to prepare a program timer or a hard timer for timer operation.

Now, in such a device, a pressure switch/saw zps signal is first input through the entire interface 110 according to a program stored in the memory ME.

At this time, if the pressure switch PS is closed and no timer signal is generated, operation of the pump P is immediately commanded through the interface i10. The operation of this pump P is carried out at the contact point P of the pressure filter 4-PS.
It will continue until the opening of the SS. When the contact PS'AZ is opened, a command is issued to stop the operation of the pump P through the interface i10, and the timer is activated. After this, if the pressure filter 4-pSf is not closed, the pump pFi will continue to be stopped. If the pressure switch eps value 2 is closed within the timer setting time, the timer setting uM
The pump P continues to be operated until the timer is overloaded, and after the set time of the timer has passed, the state of the pressure switch 4-PS is judged again. At this time, if the pressure switch PS is open, a pump stop≠2 command is issued, and the timer is started again. In addition, if the pressure switch 4-PS sr is closed, the operation command for the pump P continues until the pressure switch 4-PS≠2 is opened (such as this, the microcomputer 1
In the example where d=Il is used, the present invention can be implemented by program 9, and the frequency of starting these water supply devices can be suppressed by combining pump speed control operation or pump number switching operation. It is possible.

〔Effect of the invention〕

As is clear from the above description, the water supply device # having a pressure tank of the present invention includes a pump, a pressure tank connected to the discharge side of the pump, and a water supply device connected to the discharge side of the pump to issue a signal that the pump needs to be operated. Detection means and pump stop F
There is a timer that emits a timer signal for a sufficient period of time to suppress the frequency of starting the pump when it is below the pump's cut-off operation time. While the 1l-j operation required signal is being input, a pump operation command signal is issued,
According to the present invention, a pump operation command means is provided which issues a pump operation command signal until both the timer signal and the operation required signal are inputted when the operation required signal is input while the timer signal is being input. According to the above, when the amount of water demanded decreases and the interval between generation of signals requiring pump operation becomes longer than the set time of a timer means, the pump will not operate according to the timer signal, resulting in wasted operating power costs. Thus, it is possible to obtain a water supply device 'Jk which always operates properly without any problems.

[Brief explanation of the drawing]

Fig. 1 is a block diagram for explaining the mechanical configuration of one embodiment of the present invention, Fig. 2 is a pump operating characteristic diagram, Fig. 31 is a diagram showing the control circuit of the control device of the embodiment, Figure 1 is a time chart for explaining the operation of the control circuit in Figure 3, Figure 5 is a pump operating characteristic diagram for explaining another embodiment, and Figure 6 is a diagram of the control circuit in another embodiment. FIG. 9a7 is a block diagram for explaining the configuration of the control device of another embodiment, and a flowchart for explaining the operation of the embodiment shown in FIG. . P...Pump, T...Pressure tank, PS-FS・0
．． Water supply state detection means, X... timer means, Y...
Pump operation command means, S, . . . operation necessary signal, S, .
・・Timer signal, S″l ”-operation command signal, Pl・
...First pressure (low pressure), P, ...Second pressure, Q
, m...small water volume. 120° 1st diagram 2 Figure a → 5th diagram 6 Figure $ 7 b

Claims (1)

[Scope of Claims] t. A pump, a pressure tank connected to the discharge side of the pump, a water supply state detection means connected to the discharge side of the pump for issuing a signal indicating that the pump needs to be operated, and a pressure tank connected to the discharge side of the pump; A timer means for emitting a timer signal, a driving required signal, and a timer signal are input, and when the driving required signal is inputted independently, the driving required signal power is input; while the input is being input, a pump driving command signal is issued, and the timer signal is output. Water supply system L2 having a pressure tank equipped with a pump operation command means that issues a pump operation command signal until both the timer signal and the operation necessary signal are inputted when the operation required signal is input, Patent In claim 1, the water supply state detection means is brought into the first state at a predetermined pressure, and the water supply state detection means is brought into the first state at a second pressure higher than the first pressure and lower than the shut-off pressure of the pump. A pressure switch 4- which issues a signal that the pump needs to be operated until a second state different from the first state is reached.
A water supply device 3 having a pressure tank configured by, in claim 1, a flow rate switch φ for detecting a predetermined small amount of water, and a pressure for detecting a low pressure determined below the pressure corresponding to the small amount of water. A water supply device having a pressure tank equipped with a water supply state detection means that issues a signal that the pump needs to be operated from the time the pressure dropper detects low pressure until the flow rate switch detects a small water flow. .