JPH03194326A - Controller for hot water supply equipment - Google Patents

Abstract

PURPOSE:To use hot water supply equipment efficiently by turning off an automatic hot water supply solenoid valve when the other faucet switch is induced to turn off as a result of large consumption of hot water latter in a kitchen or the like during automatic hot water supply and forcing the automatic hot water supply to stand by. CONSTITUTION:When hot water is used by a hot water supply faucet 9 in a kitchen or a similar place during automatic hot water supply to a batch tub 21, and the other faucet switch 51 detects the running of hot water and is turned on, if a float switch 30 is turned off within a specified time, a controller 34 will turn off an automatic hot water supply valve 7 by each signal from a water quantity sensor 4, the float switch 30 and a signal from the other faucet switch 51 and force the automatic hot water supply to stand by. Then, when the other faucet switch 51 is turned off, automatic hot water supply stand by will be canceled and the automatic hot water supply solenoid valve 7 will be turned on so that automatic hot water supply may be started again. After an automatic hot water supply switch 35 is turned on, even if the other faucet switch 51 is turned on, automatic hot water will be continued if the float switch remains to be on. It is, therefore, possible to use efficiently the hot water supply equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a water heater that automatically fills a bathtub with hot water.

BACKGROUND OF THE INVENTION Conventionally, this type of bathtub with water heater has had a configuration as shown in FIG. 1, for example.

To explain the details, 1 is a bath pot with a water heater, which has a built-in hot water heat exchanger 2 and a bath reheating heat exchanger 18, and is used for supplying hot water to the kitchen and shower, and for reheating the bath. . First, I will explain from the water supply side, when water is led to the bath pot 1 with a water heater by the water supply pipe 3 connected to the water pipe,
It is branched, and one side is guided to the water flow sensor 4 and the hot water supply heat exchanger 2, and the other side is guided to the bypass valve 26, whereupon it is combined with the hot water heated by the hot water supply heat exchanger 2 and flows into the hot water supply pipe 6. ,
It reaches the water volume proportional valve 5 provided beyond that point. When the hot water exits the water proportional valve 5, it is branched at a branch part 11 into a hot water pipe B8 connected to an automatic hot water supply electromagnetic valve 7 and a hot water pipe AIO led to a hot water faucet 9 installed in a kitchen or the like. Hot water pipe B8
There is a solenoid valve 7 for automatic hot water supply at the end, a first check valve 27,
It passes through a vacuum breaker 28, passes through a second check valve 29, and then branches at a bath circuit branch 36, with a two-way valve 31 connected to one end. The two-way valve 31 has a ball valve (not shown) inside thereof, and the ball valve is rotated by a motor 32. The two-way valve 31 can be opened and closed by rotating the ball valve.

Now, when trying to supply hot water to the bathtub 21, if the two-way valve 31 is closed, the hot water passes through the flow switch 30 and the bath heat exchanger 18, then through the bath pipe 19, and then through the bath adapter 20. and is guided to the bathtub 21.

Reference numeral 34 denotes a controller for the bathtub 1 with a water heater, which has an automatic hot water supply sequence to be described later, and executes the sequence together with the remote controller 32. 35 is an automatic hot water supply switch that automatically controls the bath pot l with water heater. 37 is an operation switch. 38
is a power outlet.

The automatic hot water supply sequence will be explained based on FIGS. 6, 7, and 8.

Connect the outlet 38 to the power source, and then turn the operation switch 3
7 is turned on, and then the automatic hot water supply switch 35 is turned on. And here, water amount sensor 4 and flow switch 3
0 is both “ON” L, and when it is confirmed that water is flowing, it moves to the next sequence. However, at this point, the automatic hot water supply solenoid valve 7 is opened, and within a predetermined time T (for example, 10 seconds), the water flow center 4 and the flow switch 3 are connected to each other.
0 is "ON" (If it is a notepad, an error message 3 will be displayed on the remote control 32 (for example, a bath remote control) with a number (for example, 53), etc.)
3, and the automatic hot water supply solenoid valve 7 is "closed" to detect an abnormality in the case where the bath pipe 19 is clogged due to severe freezing. Next, when it is confirmed that there is no blockage in the bath pipe 19, etc., automatic hot water supply using the bath pipe continues as it is. At this time, since the three-way valve is closed, the water level sensor 23 detects that the bathtub 2
Water level within 1 can be detected.

The water level in the bathtub 21 is lower than the bath return pipe 2 of the bath adapter 20.
2, the output of the water level sensor 23 begins to rise, so a bathtub water inflection point determination unit 42 is provided that determines the inflection point at the point where the water level rises, for example, by 10 bits (approximately 2.5C1 m in water level).

Furthermore, the additional drop is 10 bits (approximately 2.51 at water level)
), the two-way valve 31 is opened for a predetermined period of time TS (for example, 30 seconds), and the bath is conveyed again through both the bath-going pipe 19 and the bath-returning pipe 22 to remove the air inside the pipes.

After this, the automatic hot water supply solenoid valve 7 is closed, and the circulation pump 17 is turned on to perform a circulating water check and completely remove the air in the pipes.

At this time, the flow switch 30 is turned on. After this, while the two-way valve 31 is closed, the circulation pump 17 is turned on.
After setting it to OFFJ, turn on the automatic hot water supply solenoid valve 7 again.
A bathtub water level reference point determination unit 43 is provided which uses the water level after a predetermined time T (for example, 20 seconds) as a reference value. This reference point is stored in the bathtub water level reference point storage section 45.

Furthermore, by transporting a flow rate obtained by multiplying the cumulative stored flow rate from the stored reference value to the set water level by a coefficient smaller than 1 (for example, 0.8) through both the bath going pipe and the bath returning pipe,
The automatic hot water supply time can be shortened by the amount of conveyance increased. 0 When the normal bath going pipe is flowing 14117 sin, if the bath return pipe is also conveyed and both are conveyed, 201 /sin will flow, so 20/14ζ1 It becomes .43. In other words, the automatic hot water supply time is shortened by the amount that the flow rate is increased by 43%.

The accumulated memorized flow rate referred to here is the amount of water poured into the bathtub from the reference point to the set water level during the trial run, which is accumulated by the water flow sensor 4. In the conventional example, the flow rate flowing through the bypass valve 26: the flow rate flowing through the water flow sensor -4:6
If this is set, the amount dropped into the bathtub is expressed by the following equation.

[The amount poured into the bathtub is 0, and the amount poured into the bathtub from the reference point to the set water level is stored in the cumulative amount poured into the bathtub storage section 44.

Furthermore, after conveying, for example, 80% of the water from the standard value to the set water level, through both the bath-going pipe and the bath-returning pipe, hot water is supplied to the set water level using only the bath-going pipe, and during that time, the water level sensor installed in the bath return pipe is used. It automatically supplies hot water to the set water level while checking the water level.

In addition, when the water level reaches the set level, the automatic hot water supply solenoid valve 7 is "closed".
the circulation pump 17 while opening the two-way valve 31.
After turning ON and checking the circulating water, if the bathtub water is lower than the set temperature, refill the water (bath heat exchanger 18 - bath going pipe 19 - bathtub 21 bath return pipe 22 - water level sensor 23). - Circulating the bath water through the two-way valve 31 of the circulation bomb 17 and the bath heat exchanger 18 to warm it up to the set temperature.

Problems to be Solved by the Invention However, in the automatic hot water supply to the bathtub 21 of the above-mentioned conventional example, if a large amount of hot water is used at the hot water faucet 9 in the kitchen or shower during this automatic hot water supply, for example, When the pipe 19 and the bath return pipe 22 are long and the bath pot 1 with water heater and the hot water faucet 9 in the kitchen are short, water may not flow to the automatic hot water supply side and the flow switch 30 may not turn on.

However, in the conventional system, there was no agreement on the automatic hot water supply sequence in such cases, so even when a large amount of hot water was being supplied in the kitchen etc., the automatic hot water supply solenoid valve remained "ON".
In reality, hot water is automatically supplied at a rate of only 1 to 2 ffi/lin.

This amount is too small for automatic hot water supply.
This was not a good thing even for high-level music fans who are not satisfied unless the music is flowing rapidly in recent years.

Therefore, the present invention overcomes the above-mentioned conventional technology! This problem is solved by providing a control device for a water heater that stops an automatic hot water supply solenoid valve when the amount of automatic hot water supply is below a certain level, and restarts automatic hot water supply again when the amount of hot water supply in a kitchen or the like decreases.

In other words, the first objective is to enable hot water supply in the kitchen or shower to be given priority over automatic hot water supply to the bathtub.

A second purpose is to automatically restart the automatic hot water supply when hot water supply in the kitchen, etc. is finished when hot water supply in the kitchen, shower, etc. is given priority over automatic hot water supply to the bathtub.

Furthermore, while giving priority to automatic hot water supply to the bathtub for hot water supply in the kitchen or shower, it is also possible to simultaneously supply hot water under conditions where the capacity of the water heater is large enough to perform the above-mentioned automatic hot water supply. purpose.

Means for Solving the Problems The present invention provides a hot water supply pipe A with a switch for other faucets that can detect hot water supply in the kitchen, etc., so that even when the automatic hot water switch is turned on, other faucet switches are turned on. Then, when the flow switch is not turned on, a means is provided to close the magnetic valve of the automatic hot water supply 1 and put the automatic hot water supply on standby.

Further, in the present invention, the other plug switch is turned off.

An automatic hot water supply canceling means is provided for canceling automatic hot water supply from standby when the automatic hot water supply returns to normal.

Furthermore, the present invention provides that when the automatic hot water supply switch is turned on and then other tap switches are turned on, the flow switch is turned on.
An automatic hot water supply continuation means is provided so that automatic hot water supply continues when the power is turned on.

Effect (1) The automatic hot water supply switch is turned on by the above means.
Later, when the other faucet switches are turned on, the flow switch is turned on.If not, the automatic hot water supply solenoid valve is closed and automatic hot water supply is put on standby.

(2) Also, the automatic hot water supply standby canceling means is set when the other faucet switch is
When returning to OFFJ, the automatic hot water supply valve is opened and the automatic hot water supply standby is canceled.

(3) Also, the automatic hot water supply continuation means continues automatic hot water supply if the flow switch remains "ON" even if other tap switches are turned "ON" after the automatic hot water supply switch is "ON".

Example Examples thereof will be described below with reference to the drawings.

Note that the same parts as those in the prior art are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained. That is, the other tap switch 39 is provided in the hot water pipe AIO between the branch portion 11 and the hot water tap 9.

The other plug switch 39 may be configured as a butterfly switch or the like, as long as it can detect ON-OFF.
The flow rate for N (closed) is 3.51/stn, 0FF (
Kaisei) flow rate is 2.54! It is designed to be able to detect about /■in. Further, the controller 34 is the seventh controller in the conventional example.
It goes without saying that it has the same structure as shown in the figure and the automatic hot water supply sequence to the bathtub 21 shown in FIG. ing.

An automatic hot water supply sequence (particularly, the combined use of hot water supply in the kitchen and automatic hot water supply to the bathtub 21) that is different from the conventional example in the above embodiment will be explained based on FIGS. 2, 3, and 4.

FIG. 2 shows the case where the test run has been completed, that is, the case where the water level reference value is stored.

This is because the mode in which the water level reference value is stored is usually used by users.

Now, when hot water is being automatically supplied to the bathtub 21, if the hot water supply tap 9 in the kitchen is used later and the other tap switch 51 detects the flow of hot water and turns "ON" L, the hot water supply pipe B8 is turned on. The state of the flow switch 30 that is connected is as follows.

(1) In the above state, the flow switch 30 is activated for a predetermined time T.
When rOFFJ occurs within one second, the automatic hot water supply standby means 46 is activated by the bath pipe blockage determination unit 40 which receives signals from the water flow sensor 4 and flow switch 30 as well as signals from other faucet switches 51. Automatic hot water supply is on standby, and the automatic hot water supply solenoid valve 7 is turned rOFF (automatic hot water supply standby in Fig. 2). (2) After the state of (1) above, the other faucet switch 51 is turned rOFF.
When reaching FJ, as shown in the state of automatic hot water supply restart in FIG. 2, the automatic hot water supply standby is canceled by the operation of the automatic hot water supply standby canceling means 47, and automatic hot water supply is restarted. (Automatic hot water supply restart in Figure 2) (3) Furthermore, turn on the automatic hot water supply switch 35.
Even if you turn on the other valve switch 51 after the L/L, the flow switch 30 is turned on.1. If the temperature remains at z, the automatic hot water supply continuation means 48 operates to continue automatic hot water supply. (Continuation of automatic hot water supply in FIG. 2) Effects of the Invention As described above, according to the present invention, the following effects can be expected.

(1) In other words, during automatic hot water supply, a large amount of hot water is used later in the kitchen, etc., and other faucet switches are turned "ON" L.

When the flow switch turns rOFFJ, the automatic hot water supply solenoid valve is set to rOFFJ and automatic hot water supply is put on standby. As a result, there is sufficient hot water supply capacity, and the amount of showering does not become uncomfortable.

(2) Also, when you finish using a large amount of hot water in the kitchen etc. during automatic hot water supply, the switch for other faucets will turn to rOF.
It is very easy to use because it automatically restarts hot water supply after FJ.

(3) Furthermore, even if the hot water supply is used later in the kitchen etc. during automatic hot water supply and another faucet switch is turned on, the flow switch will not turn on.
”, automatic hot water supply will continue, allowing you to use the water heater efficiently.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing one embodiment of the control device for the water heater of the present invention, Fig. 2 is a sequence diagram of the automatic hot water supply, and Fig. 3 is the same Wl.
im block diagram, Fig. 4 is the same flowchart, Fig. 5 is a configuration diagram of the conventional example, Fig. 6 is a flowchart of the conventional example, Fig. 7 is a control block diagram of the conventional example, and Fig. 8 is a time chart of the conventional example. It is. 2... Heat exchanger for hot water supply, 7... Automatic hot water supply solenoid valve, 8... Hot water supply pipe B, 9... Hot water tap, 10... ...Hot water pipe A. 21...Bathtub, 30...Flow switch, 34...Controller, 46...Automatic hot water supply standby means, 47...Automatic hot water supply standby release means,
48... Automatic hot water supply continuation means, 51...
Other plug switch.

Claims (3)

[Claims] (1) A hot water supply heat exchanger, a hot water supply pipe A that supplies hot water heated by the hot water supply heat exchanger, and has a faucet switch that opens and closes when hot water is supplied or stopped, and the hot water supply heat exchanger a hot water supply pipe B having an automatic hot water supply solenoid valve that supplies hot water heated by the device to the bathtub and that supplies and stops the hot water midway;
A flow switch that operates when a predetermined amount of hot water flows into hot water pipe B, an automatic hot water supply switch that starts automatic hot water supply, and an ON (closed) flow switch close the automatic hot water supply solenoid valve. and a controller that automatically performs hot water supply, and when the automatic hot water supply switch is turned on and another faucet switch is turned on during automatic hot water supply, when the flow switch is turned off, the controller is configured to turn on the automatic hot water supply switch. A water heater control device comprising an automatic hot water supply standby means that closes a solenoid valve and puts automatic hot water supply on standby. (2) The water heater according to claim (1), wherein the controller has automatic hot water supply standby canceling means for canceling the automatic hot water supply standby when the other faucet switch no longer detects the flow of hot water and is turned OFF (open). Control device. (3) Even if the automatic hot water supply switch is turned on (closed) and other tap switches are turned on (closed) during automatic hot water supply, if the flow switch remains on (closed), the controller will automatically supply hot water. 2. The water heater control device according to claim 1, further comprising automatic hot water supply continuation means for continuing the hot water supply.