JPH01230948A - Hot water supply device equipped with hot water fill-up device into bathtub - Google Patents

Abstract

PURPOSE:To stop hot water filling-up operation into a bathtub when hot water is being filled up with a drain stop valve left open or incompletely closed, by maintaining a hot water fill-up valve in open state by the output of an OR output circuit and setting a predetermined water level of an initial water level detection means as an initial water level during normal operation. CONSTITUTION:When a drain stop valve 14 is closed completely, a stored hot water level reaches a specified initial water level within a predetermined time and an initial water level detection means is in output state during this time. Therefore, a hot water fill-up valve 13 is kept open by the output of an OR output circuit 20 equivalent to the output of this initial water level detection means, thereby allowing the hot water fill-up motion to be maintained. Next, when the drain valve 14 is left open or when the drain valve 14 is incompletely closed, a stored hot water level in a bathtab 8 fails to reach the initial water level within the time predetermined by a timer 21. In the lapse of time predetermined by the timer 21, there is no output from the OR output circuit 20, which results in the closed state of the hot water fill-up valve 13. In other words, the hot water fill-up valve 13b is kept closed, thereby halting the hot water fill-up operation.

Description

[Detailed Description of the Invention] [Field of Application] The present invention relates to a water heater with a hot water filling device, particularly a water heater of a type that can automatically store a certain amount of water in a bathtub by operating four intervals. In order to prevent the inconvenience caused when hot water is filled with the drain plug of the bathtub left open or incompletely closed, the system detects the storage speed during automatic filling of hot water. If the water supply is slower than normal automatic hot water filling, the hot water supply will be stopped and an alarm will be issued.

[Prior art and its problems] Recently, water heaters with an automatic hot water filling function have become popular, and the configuration generally shown in FIG. 6 is adopted.

In this one, the circuit to be heated (1) is connected via the heat exchanger (1).
0) into a normal hot water supply circuit (11) and a hot water filling circuit (12) for the bathtub (B), and a hot water filling valve (13) is inserted into this hot water filling circuit (12). The hot water filling valve (13) is controlled by the output of a water level switch (2) that detects the stored hot water level in the bathtub CB.

Therefore, when the hot water filling operation opens the hot water filling valve (13) and communicates the heated circuit (10) with the bath 1ff (B) via the hot water filling circuit (12), hot water from the water heater flows into the bathtub. (B) Stored in. When the amount of hot water stored in the bath 41 (ICB) reaches the final set amount, the water level switch (2) detects the corresponding water level, and from this next output,
The hot water filling valve (13) is automatically closed and the hot water filling operation is stopped.

That is, when the amount of hot water stored in the bathtub (B) reaches a certain level, the hot water supply is automatically stopped and the filling of the bath 41 (B) with hot water automatically proceeds.

However, in this conventional type, when the drain plug (14) in the bathtub (B) is left open and hot water is filled, almost no hot water is stored in the bathtub (B).
A situation may arise in which the hot water filling operation continues while hot water is being discharged from the drain plug (14), and the hot water filling operation does not stop.

In addition, if the drain plug (14) is left incompletely closed when filling with hot water, it will take a long time to fill the hot water, and the thirst in the bath 4ff (B) will be exhausted after the filling is completed. There is.

This is because the judgment of the closed state of the drain valve (14) is left to humans, and it is not possible to judge when the drain valve (14) is left open or incompletely closed. It is.

[Technical Problem] In the present invention, the hot water filling operation progresses by such r hot water filling operation, and the bath 4! (B) A hot water filling device with a final hot water storage amount detection means that detects when the amount of hot water stored in the tank reaches the final set amount, and automatically stops the hot water filling operation based on the detection output at this time. In order to be able to stop the hot water filling operation if the water filling operation continues with the drain valve (14) left open or incompletely closed in the water heater, the appropriateness of the hot water storage speed at the beginning of hot water filling is determined. The technical challenge is to make it possible to detect.

*Regarding the invention of the first claim [Technical means] The technical means of the invention of the first claim taken to solve the above technical problem is "a timer (21) that becomes an output state by a hot water filling operation, An initial water level detecting means that detects the initial water level to be stored in the bathtub (B) within the set time of the timer (21) and becomes an output state when the water level is equal to or higher than the initial water level, and the timer (21) and the initial water level. The OR output circuit (20) of the detection means is provided, and the output from the OR output circuit (20) maintains the hot water filling valve (13) in an open state, and also sets the water level of the initial water level detection means. 1. The initial water level during normal operation is assumed to be .

(See Figure 1) [Effect] The above technical means of the present invention operates as follows.

The water filling operation puts the timer (21) into the output state, so the water filling valve (13) goes into the open state due to the output of the OR output circuit (20), and the water is supplied to the bathtub (B) via the hot water filling circuit (12). ) starts supplying hot water. This timer (
The hot water filling operation continues according to the output of this timer (21) during the set time of 21).

Since the initial water level is set in advance to a predetermined water level, if the drain valve (14) is completely closed, the hot water storage water level will reach the predetermined initial water level within the set time, and the initial water level will reach the predetermined initial water level within this time. The water level detection means is in an output state. Therefore, from now on, the OR output circuit corresponding to the output of this initial water level detection means (
The hot water filling valve (13) is maintained in an open state by the output of 20), and the hot water filling operation continues. When the final hot water storage amount is reached, the final hot water storage amount detection means detects this,
The output at this time automatically closes the hot water filling valve (13).

Next, if the drain plug (14) is opened or if this drain plug (14) is incompletely closed, the water level in the bathtub (Bl) will be The initial water level is not reached. Therefore, when the set time of the timer (21) has elapsed, there is no output from the OR output circuit (20), and the hot water filling valve (13) is not maintained in the open state. That is, The hot water filling valve (13) is closed to stop the elongation.

[effect] Since the present invention has the above configuration, it has the following unique effects.

When the drain plug (14) is open and this drain plug (
14) is incompletely closed, the timer (2
Since the hot water filling valve (13) is closed and hot water filling is stopped when the set time in 1) has elapsed, the inconvenience of continuing hot water filling under abnormal conditions is eliminated.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 2 and 3.

In this embodiment, as shown in FIG. 2, in order to detect the amount of water stored in the bath 41(B), as in the conventional example,
A water level switch (2) is adopted, and the configuration of the gas circuit, heated circuit (10), and hot water filling circuit (12) is similar to the conventional example described above. And the initial supply? The gJ amount detection means includes an auxiliary water level switch (2) that detects the water level in the bathtub (B) in the same way as the water level switch (2).
2) has been adopted.

This embodiment has an electric circuit as shown in FIG. The details of this circuit will be explained below based on the same figure.

Basically, a known main control device (3) is employed for combustion control, automatic ignition, temperature control, etc. of the appliance, and each part is controlled by this. This main control device (3) is brought into operation by closing the main switch (S).

Next, the final electrical circuit for automatic hot water filling? %4
A water level switch (2) as a jk detection means, an auxiliary water level switch (22) as an initial water level detection means, an easy-to-bow valve (13), and a timer (21) are incorporated.

The output contact of a normally closed water level switch (2) is inserted in series in the circuit to the hot water filling valve (13), and this water level switch (2) and the auxiliary water level switch as the initial water level detection means are connected in series. (22) is connected in series with the normally open output contact output.

The timer (21) has a normally open output contact (23) whose output contact is in a closed state (output state) for a set time, and this normally open output contact (23) and an auxiliary water level switch The normally open output contact (22) is connected in parallel, and this parallel circuit becomes an OR output circuit (20). When the water level of the bathtub (B) reaches or exceeds the initial water level, the output contact of the auxiliary water level switch (22) is maintained in the closed state. Note that this initial water level is set to a dry water level that is stored within several minutes to about 10 minutes after the start of hot water filling under normal conditions.

A 7-way bow length switch (24) for hot water filling operation is inserted in the circuit to the timer (21), and when this easy bow length switch (24) is closed, hot water filling starts. .

By the above operation, the normally open output contact (
23) is closed, the hot water filling valve (13) becomes conductive, and the hot water filling operation progresses as the bathtub (B) and the heated circuit (10) communicate with each other via the hot water filling circuit (12). .

When the hot water level in the bathtub (B) reaches the initial water level, the auxiliary water level switch (22) is closed and the timer (22) is closed.
After the set time in 1) has passed, this auxiliary water level switch (22)
The hot water filling valve (13) is brought into conduction by the circuit on the contact side, and is maintained in an open state. When the water level in the bathtub CB) reaches a predetermined final water level, the water level switch (2) is opened and the hot water filling valve (13) is closed, stopping the hot water supply via the hot water filling circuit (12). .

If the drain valve (14) remains open or has a sag, the water filling valve (13) becomes non-conducting and closes due to the action described above. The hot water filling is stopped.

In particular, in this embodiment, as shown in the figure, an alarm circuit is incorporated, so that if the hot water level in the bathtub (B) does not reach the initial water level within the time set by the timer (21), is stroked so as to sound the alarm buzzer (4). Therefore, the abnormality of the drain plug (14) can be clearly determined.

As a configuration for this alarm, in this embodiment, an alarm buzzer (4
) are connected in series.

By adopting this configuration, when the amount of hot water in the bathtub (B) does not reach the initial supply amount within the time set by the timer (21), the hot water filling valve (13) is closed, and the normally closed output contact (4) is closed.
1) is restored and closed, the alarm buzzer (4) will sound. Although the above circuit is configured to control the alarm buzzer (4) by a contact circuit, it is also possible to control the alarm buzzer (4) by a non-contact control circuit.

The configuration of the above embodiment is such that the main control device (3) is put into operation by closing the main switch (S), but the main control device (3) includes necessary parts such as the ignition device. It is also possible to adopt a configuration in which the water filling switch (24) is turned on by closing the hot water filling switch (24). To do this, as shown by the imaginary line in the same figure, the required parts of the main control unit (3) are made conductive by the output contact of the relay (R), which becomes operational when the hot water filling switch (24) is closed. It may be configured as follows.

*About the invention claimed in the second claim The invention claimed in the second claim is designed to achieve the same object as the invention claimed in the first claim. The purpose is to detect stagnation from the bathtub by comparing the

[Technical Means] The technical means of the invention of the second claim is the initial/! ll
Amount detection means and the initial supply? Bathtub C corresponding to J4 quantity
B) comprises an initial water level detection means that detects the initial water level and becomes an output state at a water level equal to or higher than the initial water level; and an OR output circuit (20) of the initial hot water amount detection means and the initial water level detection means; The hot water filling valve (13) is maintained in an open state by the output of the output circuit (20). (See FIG. 4) [Operation] The above technical means of the present invention operates as follows.

(Hot water filling) As the initial water level detection means goes into the output state due to mulberry cultivation, the hot water filling valve (13) becomes open state by the output of the OR output circuit (20). Then, hot water supply to the bathtub (B) is started.

The hot water filling operation continues based on the output from the initial hot water amount detection means until the initial hot water amount detection means measures the initial amount of hot water supplied.

Since the initial supply amount of hot water is set to a predetermined value in advance, if the drain valve (14) is completely closed, when the initial supply amount of hot water is supplied to the bathtub, r? The water level in J4u reaches a predetermined water level, and at this point the initial water level detection means (22) enters the output state. Therefore, from now on, the hot water filling valve (13) is maintained in the open state by the output of the OR output circuit (20) corresponding to the output of this initial water level detection means.
(JJJ filling operation continues. Then, when the final hot water storage amount is reached, the hot water storage unit detecting means detects this, and the hot water filling valve (13) is automatically closed by the output at this time.

Next, when the drain plug (14) is open or when this drain plug (4) is in an incompletely closed state, the initial hot water amount detection means detects the amount of hot water inside the bathtub (B) during the initial hot water supply. The water level does not reach the initial water level. Therefore, when the initial hot water amount detection means detects the initial supplied hot water amount, there is no output from the OR output circuit (20), and the hot water filling valve (13) becomes non-conductive and is not maintained in the open state. That is, the hot water filling valve (1
3) is closed and the filling of hot water is stopped.

[effect] Since the present invention has the above configuration, it has the following unique effects.

The invention of the second claim can be used for initial supply when there is leakage from the bath or when the plug is forgotten. At the time of supply of % amount,
Since the hot water filling valve (13) is closed, the same effect as that of the invention of the first claim can be obtained.

In particular, in the case of the invention of the second claim, since the initial supply of hot water supplied to the bathtub and the corresponding initial water level are compared, the amount of hot water supplied per unit time by the water heater changes. It can also detect whether water is leaking from the bathtub.

[Example] An example of the invention of the second claim will be described based on FIGS. 2 and 5.

In this embodiment, the set value for the initial supply amount of hot water is 0.1.
The diameter is set to about rn' to 0.2 m', and the configuration of the gas circuit and water circuit is similar to that of the embodiment of the invention claimed in the first claim (the one shown in FIG. 2). The electric circuit for this is constructed as shown in FIG.

The configuration of this electric circuit is basically not much different from that of the embodiment of the invention of the first claim shown in FIG. 51), a flow meter (52) inserted into the hot water filling circuit (12) as shown by the imaginary line in FIG. 2, and the setting device (
51) and the flowmeter (52), and compare the outputs of the flowmeter (51) and flowmeter (52).
2) is in an output state until the measured value reaches the set value, and becomes a non-output state when the meter'Jfk value of the flowmeter (52) reaches the set value. Ru. The output voltage of this comparator (53) is applied to the base of the switching transistor (54). A PNP transistor is used as the switching transistor (54), and the circuit is opened when there is an output from the comparator (53).

The switching transistor (54) and the normally open output contact of the auxiliary water level switch (22) are connected in parallel, and this parallel circuit is connected in series to the hot water filling valve (13).

Therefore, in this embodiment, the parallel circuit of the switching transistor (54) and the normally open output contact of the auxiliary water level switch (22) becomes the OR output circuit (20).

With the above configuration, when the measured value of the flow meter (52) reaches the set value, if the stored hot water level in the bathtub has not reached the initial water level, the hot water filling valve (13) becomes non-conducting. This causes the hot water to stop filling automatically.

Next, a relay (R1) is connected in series in parallel with the hot water filling valve (13), and its normally open output contact is connected in series with the normally closed output contact of the auxiliary water level switch (22). It is inserted in series in the circuit (4).

As a result, when the measured value by the flowmeter (52) reaches the set value, the buzzer (4) will sound if the water level in the bathtub (B1) has not reached the initial water level.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the invention of the first claim, Fig. 2 is a detailed explanatory diagram of the invention, Fig. 3 is an explanatory diagram of the electric circuit thereof, and Fig. 4 is an explanatory diagram of the invention of the second claim. 5 is an electric circuit diagram of an embodiment of the invention of the second claim, and FIG. 6 is an explanatory diagram of a conventional example. (B) ... Bathtub (21) ... Timer (22) ... Auxiliary water level switch (20) ... OR output circuit (13) ... Hot water filling valve (52) ···Flowmeter

Claims (1)

[Scope of Claims] [1] As the hot water filling operation progresses, the final hot water storage amount detecting means detects the point in time when the amount of hot water stored in the bathtub (B) reaches a certain amount; In a water heater equipped with a hot water filling device that automatically stops the hot water filling operation based on the detected output, there is a timer (21) that goes into the output state when the hot water filling operation is performed, and a timer (21) that turns on the bathtub ( B) comprises an initial water level detecting means that detects the initial water level to be stored in the water tank and enters an output state at a water level equal to or higher than the initial water level, and an OR output circuit (20) of the timer (21) and the initial water level detecting means. The output of this OR output circuit (20) is used to maintain the hot water filling valve (13) in an open state, and also sets the water level set by the initial water level detection means to the initial water level during normal operation. water heater. [2] As the hot water filling operation progresses, the final hot water storage amount detection means detects the point in time when the amount of hot water stored in the bathtub (B) reaches a certain amount, and the hot water filling operation is performed based on the detection output at this time. In a water heater equipped with a hot water filling device that automatically stops the hot water filling, the initial water supply system measures the amount of hot water supplied from the start of hot water filling and turns into an output state when this supplied amount reaches a certain amount of initial hot water supply. a hot water amount detecting means, an initial water level detecting means that detects the initial water level of the bathtub (B) corresponding to the initial supplied hot water amount and becomes an output state at a water level equal to or higher than the initial water level, the initial hot water amount detecting means and the initial water level detecting means. OR of
This OR output circuit (20) is equipped with an output circuit (20).
) A water heater with a hot water filling device that maintains a hot water filling valve (13) in an open state by output from the hot water filling device.