JPH0830604B2 - Bath drop abnormality monitoring method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of monitoring a drop abnormality when hot water is automatically dropped into a bathtub by a hot water supply device.

[0002]

2. Description of the Related Art In a conventional bath water heater such as a bath automatic water heater or a bath kettle with a bath automatic water heater,
As a measure to prevent excessive hot water supply due to forgetting the faucet in the bathtub or an abnormality in the water level sensor, for example, the situation where hot water is flowing out, obtain the maximum dropable amount from the bathtub capacity, and exceed the maximum dropable amount. A method of stopping the bath hot water when the hot water is supplied or stopping the bath hot water when the hot water continues for a certain period of time or more has been adopted.

[0003]

However, in the above-mentioned conventional method, there is a drawback in that it is slow to respond to a drop-in abnormality such as forgetting a faucet or an abnormality in the water level sensor, and a large amount of useless hot water flows before the bath hot water is stopped. there were.

Therefore, the present invention solves the above-mentioned drawbacks of the prior art, and detects early for a forgotten faucet, a failure of the water level sensor, and other drop abnormalities, and wasteful consumption of hot water. The purpose is to provide a bath drop abnormality monitoring method that can be minimized.

[0005]

In order to achieve the above object, the bath drop abnormality monitoring method according to the present invention is applied to the bathtub 2.
In addition to the bath water level sensor 11 that detects the water level, you can bathe from the water heater.
Equipped with a water amount sensor 22 that detects the amount of hot water dropped into the tank 2.
Well, hot water is automatically dropped into the bathtub 2 by the water heater.
In case of drop, monitor the water amount sensor 22
The maximum drop corresponding to the total capacity of the bathtub 2
The controllable unit 60 stores in advance the amount Y that can be imbedded, and
The last automatic drop operation when the drop was actually completed
The sum of the drop amount x at
The drop abnormality monitoring amount X is stored, and during the current automatic drop operation , when the accumulated drop amount exceeds either the drop abnormality monitoring amount X of this time or the maximum possible drop amount Y , it is determined as a drop abnormality, and automatic The feature is that the dropping is stopped.

[0006]

[Function] Since there is no previous time in the first automatic bath drop operation, the maximum possible drop amount Y stored
It will be monitored for abnormalities. That
The first bath drop operation was performed smoothly and the bath water level
When the sensor 11 detects the preset water level,
The operation is stopped and the automatic bath drop operation is completed.
If the amount of water dropped by that time is 22
Is measured in advance, and the measured drop amount is
The sum of the specified fixed amount is the next drop error monitoring amount
Stored as X. Therefore, after the second time,
Add a certain amount to the amount of the last drop when the filling was completed
Abnormal drop-in error
Is monitored. Of course, even in that case, of course the maximum drop
The allowable amount Y is also monitored as a backup. This
Thus, according to the present invention, the drop abnormality is detected as the bathtub capacity (maximum
Maximum drop amount corresponding to (confirmed from the beginning)
Y is used as a backup monitor, and it is actually dropped.
Based on the previous actual performance drop amount x
It should be monitored by the drop monitoring amount X
Wasteful amount of water is drained before the abnormality is discovered,
It also prevents the wasted time from passing, and
A reliable drop abnormality with a small amount of water loss at an early stage
Can be monitored.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings. FIG. 1 is an overall configuration diagram of a bath water heater in which the present invention is used, FIG. 2 is a diagram showing an example of a hot water path at the time of automatic bath drop, and FIG. 3 is a flowchart for monitoring a bath drop abnormality by a control unit.

Bathtub 2 for heat exchange can body 1 of 1 can 2 circuit
A circulation path 3 composed of a return pipe 3a, a return pipe 3b, and a heat exchange coil 3c is provided, and a water supply pipe 4a is connected to a can body 1 via a pressure reducing valve 5 from the can body 1. A tap pipe 7 is provided. That is, the circulation path 3, the water inlet pipe 6a, and the hot water outlet pipe 7 constitute one can and two circuits.

The return pipe 3b of the circulation path 3 is provided with a circulation pump 8 and a water flow switch 9, and the outflow pipe 3a is provided with a bath temperature sensor 10 and a bath water level sensor 11. A bath hot water supply passage 20 is connected to the outflow pipe 3a in the middle thereof via a first three-way valve 12, and a first short-circuit passage is provided downstream of the three-way valve 12 via a second three-way valve 13. 30 are provided. On the other hand, a second short-circuit path from the discharge side of the circulation pump 8 of the return pipe 3b is routed midway through the electromagnetic opening / closing valve 41 to the forward pipe 3a.
Connected to.

The bath hot water supply passage 20 starts at the discharge port of a thermomixing valve 21 for mixing water from the water pipe 6 and hot water from the hot water pipe 7 and reaches a hopper 24 via a water amount sensor 22 and an electromagnetic opening / closing valve 23. Further, the check valve 25 is connected to the first three-way valve 12. The hopper 24 may be omitted and the bath hot water supply passage 20 may be directly connected. 50 is a burner, 60 is a control unit, and 70 is a remote controller. The control unit 60 is a remote controller
In response to a command from 70, information from the water flow switch 9, bath temperature sensor 10, bath water level sensor 11, water amount sensor 22 and the like is input, and a microcomputer incorporated therein calculates according to a predetermined program, and the circulation pump 8 , First, second
The command is output to the three-way valves 12 and 13, the electromagnetic on-off valves 23 and 41, the burner 50, and the like.

In the automatic bath drop operation, when the bath hot water supply switch is turned on, the solenoid on-off valves 23 and 41 are opened, and the first and second three-way valves 12 and 13 form a hot water path in the direction of the thick line in FIG. To do. And by driving the circulation pump 8,
Hot water is conveyed in the direction of the arrow along the route indicated by the thick line in FIG. That is, the hot water supplied from the heat exchange can body 1 is made into hot water suitable for bath water dropping by the mixing valve 21, dropped into the hopper 24, and further two three-way valves 12,
After passing through 13, it is connected to the return pipe 3b through the first short circuit 30 without being guided to the heat exchange coil 3c, and is further sucked into the circulation pump 8 and then guided to the bathtub 2. In addition, the solenoid on-off valve
41 may be closed for single-sided conveyance. When hot water is supplied to the bathtub up to a preset constant water level, the bath water level sensor 11 detects this and the solenoid on-off valve 23 is operated via the control unit 60.
Is closed and the circulation pump 8 is stopped.

By the way, the automatic bath drop-in operation does not always go smoothly. Forgetting faucet in bathtub and water level sensor
There may be 11 breakdowns. In preparation for such an abnormal situation,
A specific example of the method implemented by the present invention will be described below as a means for detecting an abnormality early and minimizing wasteful consumption of hot water. Now, for example, if the capacity of the bathtub 2 is 400 liters, the 400 liters is stored in the microcomputer built in the control unit 60 as the maximum dropable amount Y. On the other hand, at the end of each automatic drop, the hot water amount x actually dropped is measured by the water amount sensor 22, and a value obtained by adding a predetermined fixed amount α to the hot water amount x is calculated as the drop abnormality monitoring amount X. , This is stored in the microcomputer. For example, if the drop hot water amount x at the completion of a drop hot water supply is 200 liters and the constant amount α is 25 liters, the next drop abnormality monitoring amount X = 225 liters. Therefore, in the next bath automatic hot-water supply, when the bath hot-water supply amount measured by the water amount sensor 22 exceeds 225 liters, the bath automatic hot-water supply is stopped as a dropping error. Of course, when the automatic bath drop-in operation is performed for the first time, the drop-in abnormality monitoring amount X has not been determined yet, so the drop-in abnormality is checked with the maximum possible drop amount Y.

According to the flow chart of FIG. 3, the control unit 60
The abnormality monitoring operation of the automatic bath dropping operation will be described below. When the automatic bath dropping operation is started now (step (a)), if the automatic bath dropping operation is the first device (first time), The stored maximum dropable amount Y is compared with the bath automatic drop integrated amount L detected by the water amount sensor 22 (step (b)), and when the integrated amount L is equal to or larger than the maximum dropable amount Y, it is determined as abnormal. Judge and stop dropping (step (g)). On the other hand, when the bath automatic drop accumulated amount L reaches the maximum dropable amount Y or more, the water level sensor
When 11 detects a predetermined water level set in advance (step (d)), the automatic bath hot water supply is completed (step (e)), and the hot water amount x dropped by the end is measured by the water amount sensor 22. This is sent to the control unit 60, and the next drop abnormality monitoring amount X is calculated by X = x + α (constant amount) and stored (step (to)). Then, when the next automatic bath drop operation is started (step (a)), the drop abnormality is monitored by the maximum possible drop amount Y and the current drop monitoring amount X obtained from the previous bath automatic drop operation. If the integrated automatic drop amount L becomes equal to or larger than the drop monitoring amount X of this time during the automatic drop (step (c)), the automatic bath drop is stopped as an abnormality (step (g)). By monitoring the drop abnormality in this way, if there is an abnormality due to forgetting the faucet or failure of the water level sensor, it can be detected relatively early, and a large amount of hot water will be wasted. It is possible to prevent it from happening.

The hot water for automatically dropping the bath is the bathtub 2.
The route up to is not necessarily the device having the configuration shown in FIGS. 1 and 2. For example, even with the device having the configuration shown in FIG. 4, it is possible to similarly monitor the abnormality of the automatic bath drop hot water supply by the above-mentioned means. 4, members having the same functions as those shown in FIG. 1 are designated by the same reference numerals. In this example, when the bath is automatically dropped, the warm water that has entered the return pipe 3b from the bath hot water supply passage 20 through the hopper 24 flows rightward in the drawing, is sucked into the circulation pump 8 and is sent to the bathtub 2 side.

[0015]

According to the bath drop abnormality monitoring method of the present invention, the present invention has the above-mentioned configuration and operation.
Maximum drop corresponding to bathtub capacity (fixed from the beginning)
The amount Y that can be embedded is monitored as a backup, and
The last automatic drop operation when the drop was actually completed
This drop difference based on the drop amount x in
Since it is monitored with the regular monitoring amount X, it is abnormal
When water is wasted before it is discovered,
By preventing the passage of time, a more realistic and early
Enables reliable monitoring of drop abnormalities with low water loss
Becomes In addition, the water level sensor for the set bath level
While monitoring using the
What you do is generally a drop that corresponds to the set water level.
Since it does not calculate the amount of water,
It is not possible to detect drop-in abnormalities based on the amount
Yes. In addition, set the bathtub water level and drop the water corresponding to the set water level.
Calculate the drop amount and drop the calculated drop amount.
By completing it, you can complete the drop.
Is dropped when the calculated drop amount is dropped.
Do not drain more wasteful water to finish the filling.
However, instead, it is different whether or not there is forgetting to stop
It cannot detect always. Further set bath water
The position is monitored using a water level sensor and dropped.
To monitor abnormalities, use a water sensor to measure the total amount of water dropped.
In the case of a method performed by monitoring (the present invention, etc.
Belongs to), the total amount of water dropped that serves as the criterion for abnormality determination.
How to determine (abnormality monitoring amount) is important. Obedience
Maximum drop is possible corresponding to the total volume of the bathtub
If the quantity is used as the abnormality monitoring quantity, drop-in abnormality
Loss of time to judge and loss of water amount are too large
It Also, calculate the amount of water in the bathtub volume that corresponds to the set water level.
When setting the amount of abnormality monitoring, firstly, set the water level each time.
It is necessary to calculate the corresponding amount of water. Secondly, it is real
Since it is a calculated value that is not based on the actual drop in performance,
When the amount of water dropped falls, the amount of water dropped and loss
If there is a deviation, etc., the calculated water will correspond exactly to the set water level.
When using the amount as the abnormality monitoring amount, the margin for judgment is
Since there is no, even if there is no drop write only abnormal, abnormal judgment
It often happens. In the present invention, the previous actual drop
Based on the accumulated amount x, and a certain amount of margin for this amount
Since α is added as the abnormal monitoring amount X, surely drop
Only anomalies can be detected.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a bath water heater in which the present invention is used.

FIG. 2 is a diagram showing an example of a hot water path at the time of automatically dropping a bath.

FIG. 3 is a flow chart for monitoring a bath drop abnormality by a control unit.

FIG. 4 is an overall configuration diagram of another bath water heater in which the present invention is used.

[Explanation of symbols]

 1 heat exchange can 2 bath tub 3 circulation 8 circulation pump 20 bath hot water supply

Front page continued (72) Inventor Nobuyuki Emoto 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo In stock company Noritsu (72) Inventor Toshiro Morita 32, Akashi-cho, Chuo-ku, Kobe, Hyogo (56) ) References: Open 62-169685 (JP, U) Open 60-7555 (JP, U)

Claims (1)

[Claims] 1. A bath water level sensor for detecting the water level of a bathtub 2.
In addition to 11, check the amount of hot water dropped from the water heater into the bathtub 2.
Equipped with a water amount sensor 22 to discharge hot water from the hot water bath
If there is a drop abnormality when automatically dropping to 2,
A method of monitoring using the volume sensor 22,
The maximum dropable amount Y corresponding to the capacity is set in advance in the control unit 60.
In memory, and before the drop is actually completed
Fixed to the amount x of automatic hot water supply
The amount including the amount α is set as the drop abnormality monitoring amount X this time.
It is stored, and during the automatic dropping operation this time, the accumulated amount of dropping is the amount X of abnormal drop monitoring of the present time.
Alternatively, the bath drop abnormality monitoring method is characterized in that when any one of the maximum possible drop amounts Y is exceeded, it is judged that the drop is abnormal and the automatic drop is stopped.