JP2000283557A - Fully automatic bath water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the wasteful throw-away of already heated hot-water by fully automatic operation of a fully automatic bath hot-water supplier, which is started under a condition that a water discharging plug is removed as it is. SOLUTION: When the amount of poured hot-water until the same arrives at the circulating port 9a' of returning side 9a of a circulating route 9 is stored previously in a memory and an automatic operation switch is put ON by a remote controller 19 to start the pouring of hot-water upon trial or initial operation, the pouring of hot-water is stopped once when the amount of water has arrived at the stored amount in the memory at first, and a circulating pump 13 for re-heating is driven. When the hot-water is circulated in the circulating route 9 for re-heating at this time, a water discharging plug 2a is decided that the same is closed perfectly and remaining hot-water pouring is re-started. When the hot-water is not circulated, it is decided that the closing of the water discharging plug 2a is forgotten and the operation is stopped thereafter while indicating an error indication in the remote controller 19, the instrument main body or the like at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fully automatic bath water heater configured to automatically boil a bath.

[0002]

2. Description of the Related Art A fully automatic bath water heater first sets an amount (water level) and temperature of hot water, and controls an automatic operation switch to ON. First, hot water heated to a set temperature by a heat exchanger for hot water supply is used. Fill the bathtub with water until it reaches the set water level, that is, fill it with hot water.Next, when the temperature of the hot water in the poured bathtub has fallen below the set temperature due to natural heat radiation, etc. The basic operation is to drive the heat exchanger to heat it to the set temperature, and to end the automatic operation. However, it also has functions such as reheating of remaining hot water, pouring (filling hot water), and warming operation.

A fully automatic bath water heater having the above-mentioned features can be operated remotely by placing a remote controller not only in a bathroom but also in a kitchen or the like in order to improve usability. Is common.

[0004]

However, since only the drain plug in the bath tub is opened and closed by a person at a time, if the drain plug is forgotten to be closed after washing the bath tub, or if the closing is incomplete, the remote controller or the like is used. When the operation switch is turned ON, pouring continues until the set water amount (water level) is reached, and there is a problem that the hot water during this time is unnecessarily discarded. The bath has to be reheated, which is very inconvenient.

[0005] An object of the present invention is to start automatic operation with a drain plug forgotten to be closed (opened) or in an incompletely closed state, and wasteful hot water is not wasted. It is to provide a fully automatic bath water heater devised as described above.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, in a fully automatic bath water heater, a pouring amount (water level) until reaching a return-side circulation port attached to a bathtub. ) Is stored in advance, and after the pouring is started by turning on the automatic operation switch, when the pouring amount reaches the stored amount, the pouring is stopped once and the circulation pump for reheating is driven. When hot water pre-poured into the bathtub circulates in the reheating circuit, it is determined that the drain plug is closed and the remaining pouring water is restarted. A stop check circuit for stopping the operation of the apparatus is provided.

Further, in the invention according to claim 2,
In the first aspect of the present invention, during the first operation, the amount of molten metal until reaching the return-side circulation port is measured and stored, and in subsequent operations, the value is always measured and stored at the first time. The plug-in check is performed based on the value.

Further, in the invention according to claim 3,
In the invention according to claim 1, at the time of a test operation, the amount of pouring until reaching the return-side circulation port is measured and stored,
In the subsequent operation, the plugging check is always performed based on the value measured and stored during the test operation.

Further, in the invention according to claim 4,
The invention according to the first to third aspects is characterized in that an error display due to forgetting to close the drain plug is displayed on the remote controller or the device main body.

Further, in the invention according to claim 5,
According to a fourth aspect of the present invention, the error display is performed by voice.

Further, in the invention according to claim 6,
The invention according to any one of claims 1 to 5, characterized in that the plugging check is performed based on the time until the hot water poured into the return-side circulation port reaches the return-side circulation port instead of the pouring amount. is there.

[0012]

[Function] The fully automatic bath water heater memorizes the amount of water or the time until the water reaches the circulation port in advance, and when the pouring is started, the amount (or time) of the hot water until the amount of water is reached. Is being measured. Then, when the measured value reaches the stored water amount or time, pouring is temporarily stopped, and then the circulation pump is driven to circulate the hot water in the bathtub in the circulation path. When the drain cock is closed, hot water in the bathtub circulates in the circulation path, and this is detected by, for example, a water switch, and when a signal is input from the water switch, pouring is restarted. Fill the water to the set water level. On the other hand, if the water flow is not detected, stop the hot water operation, perform an error display on the remote control or the main body of the device, and notify that the drain cock is not closed or incompletely closed,
Prompt closure.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to FIG.
In FIG. 1, 1 is a two-can, two-water type fully automatic bath water heater, 2 is a bathtub, and 2a is a drain plug. 3 is the water supply line 1
A hot water supply unit for heating tap water supplied from a through a water amount sensor 1b, wherein 3a is a hot water supply heat exchanger and 3b is a gas burner. 4 is a reheating unit, 4a is a reheating heat exchanger, and 4b is a gas burner. 5 is a hot water supply line of the hot water supply unit 3, and this hot water supply line 5 is a hot water supply line 7 leading to a hot water tap 6.
And a line via the line 8 to the inlet side of the reheating unit 4 a of the reheating unit 4.

Reference numeral 9 denotes a circulation path connected between the bathtub 2 and the reheating unit 4. The return side 9a is connected to the line 8, and the outgoing side 9b is connected to the tapping side of the reheating unit 4. Have been. Reference numeral 10 denotes a water flow switch mounted on the inlet side of the reheating unit 4 (downstream side where the line 8 and the return side 9a join), 11 denotes a pouring solenoid valve, 12 denotes a pouring water amount sensor, and 13 denotes a recirculating pump for reheating. , 14 is a bath thermistor, 15 is a bypass connecting the clean water line 1a and the hot water supply line 5, 16 is a bypass water flow control valve, 17 is a water flow control valve, 18 is an electric board, 19 is a remote control attached to the bathroom, The fully-automatic bath water heater 1 of this embodiment is automatically operated by the electric board 18.

Next, an example of the plug check operation and the normal operation in the above embodiment will be described. Closure Check Operation (During Trial Operation or Initial Operation) An example of a plug check operation performed during test operation or initial operation will be described with reference to FIGS. 1 and 2. When the operation switch is turned on by the remote controller 19 in the test operation or the first operation (step 1), the clean water flows from the clean water line 1a into the heat exchanger 3a, and at the same time, the heat exchanger 3a.
Is driven, hot water at a set temperature is poured into the bathtub 2 via the hot water supply line 5 → line 8 → reheating heat exchanger 4 a → outgoing side 9 b. This pouring amount is detected by pouring water amount sensor 12. When the pouring water level reaches the circulation port 9a 'on the return side 9a of the circulation path 9, the pouring is stopped once, and the amount of water poured up to that time is measured. In the embodiment, 1
The pouring amount is repeatedly measured N times every 0 liter.

Next, when the circulation pump 13 is driven (step 3), and when the running water switch 10 detects that the hot water in the bathtub 2 is circulating in the circulation path 9 (step 4), by then, The amount of hot water poured (the water level up to the circulation port 9a '(circulation fitting) on the return side 9a) is stored in the control circuit (step 5), and then pouring is resumed until the set water level (water volume) is reached. Hot water filling (pouring) is performed (step 6). Next, the circulation pump 13 is driven to reheat the hot water stretched in the bathtub 2 until the set temperature is reached (step 7). The above is the first or trial operation.

Normal operation An example of normal automatic operation will be described with reference to FIGS. When the operation switch is controlled to ON (step 1)
0), the tap water is supplied from the tap water line 1a, and at the same time, the hot water supply heat exchanger 3a is driven to heat the tap water supplied from the tap water line 1a to the set temperature in the hot water supply heat exchanger 3a. Then, the heated hot water is poured into the bathtub 2 via the line 8 → the reheating heat exchanger 4a → the outgoing side 9b. When the pouring amount reaches the water amount (10 liters × N) stored at the time of the test operation or the first operation, the pouring is temporarily stopped, and the circulation pump 13 is driven (step 11). And the running water at this time is detected by the running water switch 10 (step 12).

When flowing water is detected, pouring is restarted, and pouring (hot water filling) is stopped when the set water level (water volume) is reached (step 13). Then, the circulation pump 13 is driven again to detect the temperature of the hot water. If the temperature is lower than the set temperature, the reheating heater 4a is driven to perform reheating to the set temperature (step 14).

On the other hand, if the running water switch 10 does not detect running water in step 12, all of the previously poured hot water is discarded because the drain plug 2a of the bathtub 2 is opened or closed incompletely. Or, it is determined that the water has been reduced, an error is displayed on the remote controller 19, and the automatic operation is stopped.
The above description is based on the circulation port 9a 'on the return side 9a from the start of pouring.
Although the plugging check is performed by storing the amount of water until the water reaches the opening, the plugging check may be performed not by the amount of water but by the time until the pouring water level reaches the circulation port 9a '.

[0020]

As described above, according to the present invention, in the automatic operation of the bath, the closing check is performed, so that the automatic operation switch is turned on without knowing that the drain plug of the bathtub is open, and the set water level is reached. The amount of water up to this point is not wasted and is economical. In addition, it is not said that the intention of boiling the bath is not boiling.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a fully automatic bath water heater according to the present invention.

FIG. 2 is an explanatory diagram of a plugging check flow at the time of test operation or initial operation.

FIG. 3 is an explanatory diagram of an automatic operation flow.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fully automatic bath water heater 1a Water supply line 1b Water quantity sensor 2 Bathtub 2a Drain tap 3 Hot water supply unit 3a Heat exchanger for hot water supply 3b Gas burner 4 Reheating unit 4a Heat exchanger for reheating 4b Gas burner 5 Hot water line 6 Hot water tap 7 Outgoing hot water Line 8 Line 9 Circulation path 9a Return side 10 Flow switch 11 Pouring solenoid valve 12 Pouring water amount sensor 13 Circulation pump 14 Bath thermistor 15 Bypass 16 Bypass water amount adjusting valve 17 Water amount adjusting valve 18 Electrical board 19 Remote control

Claims (6)

[Claims] 1. A pouring amount (water level) until reaching a return side circulation port attached to a bathtub is stored in advance,
After the pouring is started by the automatic operation switch ON, when the pouring amount reaches the stored amount, the pouring is stopped once and the recirculating pump for reheating is driven. When the hot water that has been poured beforehand circulates, the drain plug is determined to be closed and the remaining pouring water is restarted. When it does not circulate, the plug check circuit that determines that the drain plug has not been closed and stops the subsequent operation A fully automatic bath water heater equipped with. 2. During the first operation, a pouring amount until reaching the return-side circulation port is measured and stored. This value is always used in subsequent operations based on the value measured and stored at the first time. 2. The fully automatic bath water heater according to claim 1, wherein the bath water heater is configured to perform a plug check. 3. During a test operation, the amount of pouring until reaching the return-side circulation port is measured and stored, and in subsequent operations, the plug is always closed based on the value measured and stored during the test operation. 2. The method according to claim 1, wherein the check is performed.
The fully automatic bath water heater described. 4. The fully automatic bath water heater according to claim 1, wherein an error display due to forgetting to close the drain plug is displayed on a remote controller or a device main body. 5. The fully automatic bath water heater according to claim 4, wherein the error display is performed by voice. 6. The fully automatic bath according to claim 1, wherein the check for plugging is performed based on the time until the hot water poured into the return-side circulation port arrives instead of the pouring amount. Water heater.