JPH03125851A - Hot water feeder - Google Patents

Abstract

PURPOSE:To make reliably the decision of other cocks by a method wherein the decision of other cocks is not made within a preset period of time immediately after the opening or closing actuation of a drop-in valve is finished but it is made after the lapse of the preset period of time. CONSTITUTION:When a starting switch for starting a drop-in operation is turned on, a drop-in valve 9 is opened in a state that a hot water feed faucet is closed or, in other words, other cocks are closed. Water is allowed to pass through a water feed pipe 1, a burner is ignited, and hot water is supplied to a drop-in pipe 32 through a hot-water supply pipe 3 to start the supply of hot water i.e. the dropping-in of hot water into a bathtub 11. A hot water level in the bathtub 11 is detected by a water level sensor 18, and when the hot water level reaches a preset level, the drop-in valve 9 is closed, and the decision of other cocks is made to decide whether the difference between an inflow amount Q1 of water and a drop-in amount Q2 continues in the state of a preset value MoQ or above (Q1-Q2>=MoQ) during a preset period of time t1. In a case where the difference between the inflow amount Q1 of water and the drop-in amount Q2 is less than the preset value MoQ (Q1-Q2<MoQ) in making the decision of other cocks, hot water is not supplied to the hot water feed faucet through a general hot water feed pipe 31, and it is decided that the hot water feed faucet is closed or, in other words, other cocks are closed. The decision is finished by displaying the state in which other cocks are closed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water heater having an automatic dropping function into a bathtub.

[Prior art]

Conventionally, water heaters that have an automatic dropping function that automatically supplies a predetermined amount of hot water to a bathtub, and that have two water flow sensors, an inlet water flow sensor and a drop water flow sensor, have been used for general hot water supply. The water intake port also determines whether the valve is open or closed.

The difference between the drop amount Q2 and the drop amount Q2 is the set value i. Q or above (QQ2
This was done by determining whether or not ≧Ma[l).

In other words, if you open the hot water tap and start using the general hot water supply while pouring water into the bathtub, the sum of the amount of dropped water Q2 and the amount of general hot water flowing into the hot water tap will be the water input I.
Since it is Ql, the difference between the incoming water amount Q1♂ and the dropping amount port 2 is the set value. When it becomes Q or more (L Q2≧Mail), it is determined that the hot water tap for general hot water supply is opened (between other taps).

[Problem to be solved by the invention]

However, in the above-mentioned conventional water heater, if the hot water supply pipe from the hot water outlet of the water heater itself to the hot water tap for general hot water supply is particularly long or a tank is installed, for some reason Air may be trapped and an air pocket may be formed.

When the drop valve opens and closes in this state, when the drop valve is opened, the pressure applied to the air sealed in the hot water tap pipe is not large, and the change in volume of the sealed air is small, so hot water is discharged normally. .

When the drop-in valve is closed, the pressure inside the hot water supply pipe increases, and the pressure applied to the air sealed in the hot water supply pipe increases, hot water flows in, the air in the air pocket is compressed, and the volume increases. The hot water continues to flow in the outlet pipe until the pressure decreases and the pressure becomes parallel, and water continues to flow into the water heater, and the incoming water flow sensor is activated.
There was a problem in that it was determined that t≧M, Q, that is, the hot water supply valve was opened, and combustion continued, resulting in an after-boiling phenomenon.

SUMMARY OF THE INVENTION An object of the present invention is to provide a water heater that can solve the above-mentioned problems and reliably determine other taps.

[Means for Solving the Problems] In order to achieve the above object, the water heater of the present invention has the following features:
The difference between a + and the drop amount Q is the set value. 0 or more (
Ql [1g≧gate. [1] In the case where the other valves are determined by determining whether or not the above-mentioned and other valves Set time 1 without performing stopper judgment. After the time has elapsed, other plugs are determined.

(Function) In the water heater of the present invention configured as described above, with all the hot water supply valves closed, the drop valve stops dropping the hot water into the bathtub. does not judge other taps, and within this set time t0, the water pressure in the pipe to the drop valve increases, and the air pocket formed in the hot water outlet pipe for general hot water supply up to the hot water supply valve rises. Hot water flows into the hot water tap pipe and compresses the air, and the pressure becomes balanced. When this pressure is balanced, the air is compressed by the hot water flowing into the hot water tap pipe and other hot water tap pipes.
The flow of hot water inside stops, and the amount of water flowing in is Q, and the amount of water being poured is
are equally zero (Ql=Qz=o).

In addition, when the drop-in valve is opened within the set time t0 from the end of the opening operation of the drop-in valve that starts dropping hot water into the bathtub when general hot water is not being supplied and all the hot water supply cylinders are closed, the drop-in valve is lowered. When the pressure in the hot water supply pipe to the hot water supply pipe is balanced with the pressure in the hot water supply pipe to the hot water supply pipe, and after the set time t0 has elapsed, that is, when the above pressures are balanced, the pressure in the drop valve pipe and other general hot water supply pipes is The flow rate of hot water in the outlet pipe becomes equal ([11=Qri.

Therefore, after the opening or closing operation of the drop-in valve is completed, there is no risk of erroneous determination even if the other taps are determined after the set time L0 has elapsed, so the other plugs are determined after confirming that the set time t0 has elapsed.

As mentioned above, after the opening or closing operation of the drop-in valve is completed, and after the set time L0 has elapsed, the pressure in the hot water tap line stabilizes in a balanced state, and there is no possibility of erroneous determination even if other taps are determined. Therefore, even during general hot water supply using a hot water heater, by performing the determination of other taps after the set time t0 has elapsed after opening or closing the drop-in valve, there is no risk of misjudgment, and accurate determination of other taps is possible. It is something that can be done.

〔Example〕

Embodiments of the present invention will be described based on the drawings.

In Fig. 1, a heat exchanger 2 and a hot water outlet pipe 3 are connected to a water supply pipe 1.
are connected to form a stop-start type heating circuit, and an incoming water amount sensor 4 and an incoming water temperature sensor 5 are installed in the water supply pipe 1 to detect the incoming water amount Q1.

A servo valve 6 is provided in the hot water supply pipe 3, and on the downstream side of the servo valve 6, the hot water supply pipe 3 is branched into a general hot water supply pipe 31 and a dropping pipe 32 into the bathtub, and the general hot water supply pipe 31 is connected to the bathroom. It is connected to a hot water supply tank (not shown) installed in another place (kitchen, washroom, etc.), and the tank 7 is installed in the middle.

The drop-in pipe 32 includes a drop-in amount sensor 8 for detecting the drop-in amount Q2, and a drop-in valve 9 consisting of a solenoid valve.
, check valves 10 are arranged in order from the upstream side, and the dropping pipe 32 is the incoming pipe 12 of the heating circulation circuit of the bathtub 11.
is communicated with.

The heating circulation circuit of the bathtub 11 includes an outgoing pipe line 12 and a heat exchanger 13.
, a return pipe line 14, and an outgoing pipe line 12,
From the connection part with the dropping pipe 32 toward the heat exchanger I3, a circulation pump 15, a water flow swing 16, an outgoing pipe 1
A water temperature sensor 17 for detecting the temperature of water in the bathtub 2 and a water level sensor 18 for detecting the water level in the bathtub 11 are installed in this order.

The controller 19 manually inputs the signal of the inflowing water amount Q1 detected by the inflowing water amount sensor 4 and the signal of the dropping amount port 2 detected by the dropping amount sensor 8, and compares the incoming water amount 01 with the dropping amount 02, Also, only the signal path for the function of controlling the opening and closing of the drop valve 9 and determining the opening/closing of hot water taps (not shown) in areas other than the bathroom is shown.

In the water heater configured as described above, the general hot water supplied from the hot water supply pipe is routed from the water supply pipe 1 to the heat exchanger 2.
The /M hot water that is heated through the outlet pipe 3 is sent from the general hot water supply pipe 31 to the hot water supply tank.

Furthermore, when dropping into the bathtub 11, the dropping valve 9 is opened by the controller 19, and the dropping pipe 32 is opened.
The intestines are supplied from there to the bathtub 11 via an incoming conduit 12.

In addition, while dropping it into the bathtub,
Priority is given to the use of general hot water.

Furthermore, during reheating, the circulation pump 15 is operated,
Water flows through a circulating heating circuit consisting of an outgoing pipe 12, a heat exchanger 13, and a return pipe 14, and is heated and heated.

Referring to the flowchart in Figure 2, the bathtub 1 when the hot water supply door is closed, that is, when general hot water supply is not being performed
The control operation at the time of dropping to 1 will be explained.

When the start switch is turned on to start the dropping operation, the dropping valve (
The electromagnetic valve) 9 is opened, water is passed through the water supply pipe 1, a burner (not shown) is ignited, hot water is discharged from the hot water supply pipe 3 to the dropping pipe 32, and hot water supply to the bathtub 11, that is, dropping of water into the bathtub 11 is started.

The water level in the bathtub 11 is detected by a water level sensor 18, and it is determined whether or not the set water level has been reached.If the water level has not reached the set water level, dropping is continued.

When the water level in the bathtub 11 reaches the set water level, the drop-in valve 9 is closed, and the difference between the water inflow M Q + and the drop-in amount Q2 is equal to the set value. Other stopper determination is performed to determine whether the state of 0 or more (QI QZ≧gate.mouth) continues for a set time of 1+ (for example, t+=2 seconds).

In determining other faucets, the difference between the amount of water entering Ω1 and the amount of water dropping o2 is the set value -. If it is less than 0 (QI 02<MeΩ), hot water is not coming out from the general hot water supply pipe 31 to the hot water tap, and the hot water tap is closed.In other words, it is determined that the water is between other taps, and the water between the other taps is displayed. The judgment ends.

The difference between the water inflow NQ1 and the drop amount o2 is the set value -. If Ω or more (QI Qz≧M, []), the set time t.

(For example, t0 = 5 seconds) In order to judge other taps after the elapse of time, a timer with a set time t0 (5 seconds) is started, and no other taps are judged within the set time t0 (5 seconds). If yes, the timer with the set time t (2 seconds) for determining other taps is not started, or the timer with the set time t0 (5 seconds) is prioritized for time determination.

The difference between the water entry 43Q within the set time t0 (5 seconds) and the drop amount Q2 is the set value -. Less than 0 (QI Qz<M.Q
), no hot water is coming out from the general hot water supply pipe 31 to the hot water tap, and the hot water tap is closed, that is, it is determined that it is between other taps, and the determination ends with displaying the other taps.

Continuously during the set time (.(5 seconds)), the difference between the amount of water entering Q and the amount of dropping Q! is greater than or equal to the set value of 1゜Ω (QI Qz≧
Pa. Q), the set time t, (2
seconds) starts.

The difference from the input NQ busy drop amount Q2 within the set time 1 + (2 seconds) for determining other taps is less than the set value 3°0 (QI Qz<
MJ), it is determined that the hot water supply switch is closed, that is, it is determined that there are other taps, and the determination is completed with the display indicating the other taps.

Continuously enters water amount Q during the set time L1 (2 seconds) for determining other taps
, and the drop amount Q2 is the set value -. 0 or more (QI
Qz≧gate. Q), the general hot water supply pipe 31
The hot water is coming out from the hot water tap, and the hot water tap is open, that is, it is determined that there are other taps, and the determination ends after displaying the other taps.

In addition, when the drop valve 9 is closed, the drop ff
1qz=o, and practically the amount of water entering is 0. is the setting value i.

It is determined whether or not Q or more (Ql≧gate.Q).

In addition, when other taps are opened and general hot water is supplied,
There is no need to judge whether there are other plugs immediately after pouring into the bathtub.

Above, we have described the determination of other faucets immediately after the water is poured into the bathtub, but the determination of other faucets when the water is not poured into the bathtub continues for the set time t, (2 seconds) when the water enters the bathtub.
The difference between r and drop-in amount port 2 is the set value a. Q or above (mouth 1
ax≧gate. This is done by determining whether or not Q).

According to the above-mentioned configuration, by reliably determining the other faucet, there is no need to interrupt the pouring even if priority is given to the other faucet, ie, the -C hot water supply, during pouring into the bathtub.

In addition, not only when air accumulates in the pipe, but also due to fluctuations in water pressure, water intrusion QI and drop amount Q
The difference between 2 and 2 fluctuates, but it is a set value. Even if it is more than Q,
The set time t1 (2 seconds) for determining other taps can prevent erroneous determinations and prevent after-boiling.

Furthermore, when the drop valve is closed from the open state, the determination of other valves starts after the set time to (for example, t0 = 5 seconds) has elapsed, so the set time t0 (5 seconds) and the set time [I (
2 seconds), no judgment is made for 7 seconds, which is the sum of 2 seconds), and it is possible to make accurate judgments in a stable state.

Here, the timer for the setting time L0 (5 seconds) and the setting time (,
By providing a separate timer (2 seconds), the set time t0 can be used except when the drop valve is closed from the open state.
Shorter setup time1. Since other stopper judgments are made using , smooth judgments can be made.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

As mentioned above, after the opening or closing operation of the drop-in valve is completed, and after the set time t0 has elapsed, the pressure in the hot water tap line stabilizes in a balanced state, and there is no risk of misjudgment even if other taps are judged. Therefore, even during general hot water supply using a hot water heater, after opening or closing the drop valve,
By performing the other tap determination after the set time t0 has elapsed, there is no risk of erroneous determination (and accurate determination of other taps can be made).

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a circuit diagram of a water heater, and FIG. 2 is a flowchart showing control steps. ■...Water supply pipe, 2...Heat exchanger, 3...Hot water pipe, 4...Large water flow sensor, 8...Drop-in amount sensor, 9...Drop-in valve (electromagnetic valve) , 11... Bathtub, 31... General hot water supply pipe, 32...
Drop pipe, Figure 1

Claims (1)

[Claims] (1) In a system that determines whether or not the other valves are different by determining whether the difference between the inflowing water amount Q_1 and the drop-in amount Q_2 is greater than or equal to the set value M_0Q (Q_1-Q_2≧M_0Q), the opening or closing of the drop-in valve A water heater characterized in that the other tap determination is not performed within a preset time t_0 immediately after the end of operation, and the other tap determination is performed after the set time t_0 has elapsed.