JP2000146287A - Hot water supply apparatus for bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep clean the bathtub water constantly even if the bath is used consecutively net time by making clean a filtering tank. SOLUTION: A back washing means for a filtering tank 27 discharges hot water heated through a hot water supply heat exchanger 3 from a hot water supply solenoid valve 20 through a lower supply passage 28, a change-over valve D29, the filtering tank 27, a change-over valve C 24, a drainage passage 30, and a supply passage to a bathtub. Consequently, foreign matters removed through a filtering material 25 in the filtering tank 27 when the bathtub water is discharged can be back washed and discharged outside without requiring any extra drainage piping work, and the bathtub water can be kept clean constantly even if the bath is used consecutively net time by making clean the filtering tank 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to purification of bath water in a bath water heater capable of supplying hot water and additional heating of a bath.

[0002]

2. Description of the Related Art A conventional bath water heater has a configuration as shown in FIG. Water passes through a water sensor 1 and a water temperature sensor 2 from a water inlet, absorbs combustion heat in a hot water supply heat exchanger 3, passes through a hot water supply sensor 4, a hot water supply control valve 5, and is discharged from a hot water outlet. The gas passes through a hot water supply source electromagnetic valve 6 and a gas hot water supply proportional valve 7 from a gas inlet, and is burned by a hot water supply burner 8.

[0003] When the bath automatic switch of the external input device 31 is pressed, the hot water of the set temperature absorbed by the hot water supply heat exchanger 3 passes through the hot water supply sensor 4 and the hot water supply amount control valve 5. Hot water is supplied from the bath connection adapter 19 to the water level set in the bathtub through the hot water supply electromagnetic valve 20, the outgoing passage 12, and the bath return passage 13.

[0004] To reheat the bathtub water, when the reheating switch of the external input device 31 is pressed, the bathtub water is circulated by the circulation pump 32 to the bath connection adapter 19, the return passage 13, the water level sensor 14, the switching valve A15, and the bath sensor. 9. Water flow switch 1
0, bath heat exchanger 11, switching valve B22, lower going passage 2
8, switching valve D29, outgoing passage 12, bath connection adapter 1
9, when the temperature of the hot water detected by the bath sensor 9 is lowered, the gas passes through the bath source solenoid valve 16 of the gas, the bath proportional valve 17, and burns in the bath burner 18, and the bath heat exchanger 11 Absorb heat and reheat the bath water.

When the purifying switch of the external input device 31 is pressed, bath water is purified by the circulation pump 32 by the bath connection adapter 19, the return passage 13, the water level sensor 14, the switching valve A15, the bath sensor 9, Water flow switch 1
0, bath heat exchanger 11, switching valve B22, upper going passage 2
3. Switching valve C24, filter medium 25 and aluminum electrode 26
Circulates through the filtration tank 27, the switching valve D29, the outgoing passage 12, and the bath connection adapter 19, and when the circulating water passes through the filtration tank 27, the aluminum electrode 26 in the filtration tank 27 is energized. The dirt and bacteria that accumulate in the filter tank are aggregated, and the aggregated foreign substances can be removed by the filter medium 25 in the filter tank 27, and the bathtub water can always be kept clean even if a person continuously takes a bath.

Further, in order to periodically discharge the foreign matter removed by the filter medium 25 in the filter tank 27 to the outside, the hot water supply heat exchanger 3
Hot water heated by the hot water supply electromagnetic valve 20 to the lower passage 2
8. Drain the water from the forward / reverse three-way valve 29, the filtration tank 27, the switching valve C24, and the drain port 33 to the outside of the machine, and perform reverse washing.

[0007]

However, the conventional bath water heater requires drainage piping work separately from the piping work of the equipment, and has a problem that the work is troublesome and the construction cost is increased. I was

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a bath water heater, in which hot water heated by a hot water supply heat exchanger flows from a hot water supply electromagnetic valve to a lower passage, a switching valve D,
It is provided with a filter tank, a switching valve C, a drain passage, and a back washing means of the filter tank for draining water from the outward passage to the bathtub.

According to the above invention, foreign matter removed by the filter medium in the filter tank when the bathtub water is drained is back-washed without drainage piping work separately from the equipment piping work, and the drainage of the bathtub is performed. The water can be completely drained out of the vessel, and the bathtub can be kept clean and clean even when a person continuously takes a bath in the next bath by cleaning the filter bath.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water supply heat exchanger for heating supply water to hot water by a burner, a water temperature sensor provided in a supply path, for detecting supply water temperature, a water quantity sensor for detecting supply flow rate, and a tap water path. A hot water supply sensor for detecting hot water temperature and a hot water supply amount control valve for controlling the flow rate of hot water, a bath heat exchanger for heating circulating water to hot water with a burner, and circulating water flowing from the bathtub to the bath heat exchanger. A return passage, a water level sensor for detecting the water level in the bathtub, a circulating pump for circulating the bathtub water, a bath sensor for detecting the temperature of the hot water in the bathtub, a switching valve A for switching the bath passage, and a hot water supply path and return. A hot water supply solenoid valve provided in a passage connecting the passages, an upper outgoing passage and a lower outgoing passage provided downstream of the bath heat exchanger, and a switching valve B for switching between the upper outgoing passage and the lower outgoing passage, Wherein the switching valve C provided in the upper forward passage provided downstream each of the selector valve C,
A drainage passage connected to a filter tank and an outgoing passage having a filter medium and an aluminum electrode; a switching valve D provided at a junction of the filter tank and the lower outgoing passage; and circulating water flowing from the switching valve D to the bathtub An outgoing passage, an external input device for inputting an operation mode, and setting a temperature and a water level of bathtub water, and hot water heated by a hot water supply heat exchanger from the hot water supply solenoid valve to a lower going passage, a switching valve D, a filtration tank. , A switching valve C, a drain passage, and a backwashing means for a filtration tank for draining water from an outward passage to a bathtub.

[0011] Even if drainage piping work is not performed separately from the piping work for the equipment, the foreign matter removed by the filter material in the filter tank when the bathtub water is drained is backwashed and completely drained from the bathtub. It is possible to keep the bathtub water clean and clean even when a person continuously takes a bath during the next bath by cleaning the filter bath.

Further, the apparatus is provided with an automatic backwashing means for automatically performing the backwashing means when the value of the water level sensor falls below a certain value.

Then, when the bathtub water is drained after the bathing is completed, it is automatically detected that the water in the bathtub has been drained so that the sewage which has been erroneously backwashed when the bathtub water is present is not drained into the bathtub. To perform backwashing.

Further, when the value of the water level sensor becomes equal to or less than a certain value, the back washing is automatically performed after a certain time has elapsed.

When the bathtub water is drained after the bathing is completed, it is automatically detected that the wastewater which has been backwashed when the bathtub water is present is drained so as not to be drained to the bathtub, and the drainage is automatically detected for a certain period of time. After the lapse of time, back washing can be performed.

Further, when the value of the water level sensor becomes equal to or less than a predetermined value, back washing is performed by operating a switch of an external input device.

When the bathtub water after bathing is supplied to a washing machine by a pump or the like and the remaining hot water is used for washing,
Backwashing can be performed by operating a switch on the external input device so that sewage that has been backwashed by mistake is drained into the bathtub and not supplied to the washing machine.

Further, when the value of the water level sensor falls below a certain value, the automatic back washing means for automatically performing back washing is temporarily stopped by a switch operation of the external input device, and the switch operation is performed again. In this way, back washing is performed.

When the bathtub water after bathing is supplied to the washing machine with a pump or the like and the remaining hot water is used for washing,
The automatic backwashing means is temporarily stopped by a switch operation of the external input device, and the remaining hot water is supplied to the washing machine and then switched again so that the sewage erroneously backwashed is drained into the bathtub and not supplied to the washing machine. By performing the operation, back washing can be performed.

If the value of the water level sensor does not fall below a certain value for a long period of time, the external input device displays a message urging drainage of bathtub water.

If the bathtub water is not drained for a long period of time and the backwashing is not performed, it is unclean and may cause equipment failure. Therefore, the drainage of the bathtub water is promoted, and then the backwashing is performed. be able to.

If the value of the water level sensor does not fall below the predetermined value for a long period of time, a display urging the drainage of the bathtub water is displayed on the external input device. The cleaning is performed.

If the bathtub water is not drained for a long period of time and backwashing is not performed, it is unclean and may cause equipment failure. Therefore, after the bathtub water is drained, the bathtub water is not drained. Backwashing can also be performed.

[0024]

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. Water passes from a water inlet through a water amount sensor 1 and a water temperature sensor 2, absorbs heat in a hot water supply heat exchanger 3, and receives a hot water supply sensor 4 and a hot water supply amount control valve. 5
Through the hot water outlet. The gas passes through a hot water supply source electromagnetic valve 6 and a gas hot water supply proportional valve 7 from a gas inlet, and is burned by a hot water supply burner 8.

When the bath automatic bath shown in the example of the external input device 31 as shown in FIGS. 2A and 2B is pressed, the hot water supply to the bathtub is set to absorb heat in the hot water supply heat exchanger 3. Hot water of the temperature passes through the hot water supply sensor 4 and the hot water supply amount control valve 5,
Hot water supply solenoid valve 20, outgoing passage 12, and bath return passage 1
3, the water is filled from the bath connection adapter 19 to the water level set in the bathtub.

When the additional heating switch shown in the example of the external input device 31 as shown in FIG. 2B is pressed, the bath water is returned to the bath connection adapter 19 by the circulation pump 32 and returned to the bath connection adapter 19 as shown in FIG. Passage 13, water level sensor 14, switching valve A1
5 (eg, two-way valve), bath sensor 9, water flow switch 1
0, bath heat exchanger 11, switching valve B (eg, three-way bypass valve) 22, lower going passage 28, switching valve D (eg, circulation 3
When the hot water temperature detected by the bath sensor 9 is circulated through the bath passage adapter 12 and the bath connection adapter 19, the gas passes through the bath source electromagnetic valve 16 and the bath proportional valve 17 of the gas. Combustion in bath burner 18, bath heat exchanger 1
Absorb heat in step 1 and reheat the bath water.

When the purifying switch shown in the example of the external input device 31 as shown in FIGS. 2A and 2B is pressed, the bathtub water is circulated by the circulation pump 32 and the bath connection adapter 19, Return passage 13, water level sensor 14, switching valve A
15 (two-way valve), bath sensor 9, water flow switch 10, bath heat exchanger 11, switching valve B22 (bypass three-way valve), upper going passage 23, switching valve C24 (drainage three-way valve), filter material 25 When the circulating water passes through the filtration tank 27, the filter tank 27 provided with the aluminum electrode 26, the switching valve D 29 (circulation three-way valve), the outflow passage 12, and the bath connection adapter 19, the aluminum electrode in the filtration tank is circulated. By energizing 26, dirt and bacteria that accumulate in the bathtub are aggregated, and the aggregated foreign matter can be removed by the filter medium 25 in the filtration tank 27, so that the bathtub water is always clean even if a person continuously takes a bath, It can be kept clean.

Further, in order to periodically discharge foreign matter removed by the filter medium 25 in the filter tank 27 outside the apparatus, the hot water supply heat exchanger 3
Hot water heated by the hot water supply electromagnetic valve 20 to the lower passage 2
8. Drainage from switching valve D29 (forward / reverse three-way valve), filtration tank 27, switching valve C24 (drainage three-way valve), drainage pipe 30, and outgoing passage 12 to the bathtub, and backwashing to perform equipment piping work. Separately, without drainage piping work, when draining the bathtub water, the foreign matter removed by the filter medium 25 in the filter tank 27 can be backwashed and discharged outside the vessel, and the filter tank 27 can be cleaned. The bathtub water can always be kept clean even if a person takes a bath continuously at the next bathing.

Also, when the value of the water level sensor 14 becomes equal to or less than a predetermined value, the back washing is automatically performed. The backwash can be performed by automatically detecting the drainage so that the wastewater does not drain into the bathtub.

When the value of the water level sensor 14 becomes equal to or less than a certain value, the backwashing is automatically performed after a certain period of time.
In order to prevent sewage water that has been backwashed by mistake when there is bathtub water from being drained into the bathtub, the drainage can be automatically detected and backwashing can be performed after a certain period of time.

Further, when the value of the water level sensor 14 becomes equal to or less than a predetermined value, the washing switch of the external input device 31 is pressed to perform reverse washing, so that the bathtub water after the bathing is completed is discharged from the washing machine by a pump or the like. When supplying and using the remaining hot water for washing, backwashing can be performed so that sewage water that has been backwashed by mistake is drained into a bathtub and not supplied to the washing machine.

When the value of the water level sensor 14 becomes equal to or less than a predetermined value, the automatic back washing for automatically performing the back washing is temporarily stopped by pressing the washing switch of the external input device 31,
When the wash switch is pressed again, automatic backwashing is performed, bath water after bathing is supplied to the washing machine by a pump, etc., and when the remaining hot water is used for washing, sewage that has been backwashed by mistake is drained into the bathtub. Backwashing can be performed to prevent the washing machine from being supplied to the washing machine.

Also, if the bathtub water is not drained for a long period of time and backwashing is not performed, it is unclean and may cause equipment failure. Therefore, when the value of the water level sensor 14 does not fall below a certain value for a long period of time. In addition, a display urging the drainage of the bathtub water is displayed on the external input device 31, and the backwashing can be performed after the drainage of the bathtub water is promoted by draining the bathtub water.

Also, if the bathtub water is not drained for a long period of time and backwashing is not performed, it is unclean and may cause equipment failure. Therefore, when the value of the water level sensor 14 does not fall below a certain value for a long period of time. Then, a display urging the bathtub water to be drained is displayed on the external input device 31, and the backwash can be performed even if the bathtub water has not been drained after a certain period of time.

[0036]

As described above, the bath water heater of the present invention
Even if you do not perform drainage plumbing separately from equipment plumbing,
When draining the bathtub water, the foreign matter removed by the filter media in the filter tank is backwashed and discharged outside the machine, and can be drained together with the bathtub drainage. Even if you take a bath, you can always keep the bathtub water clean.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a bath water heater according to Embodiment 1 of the present invention.

FIG. 2 (a) Example display of the external input device (b) Example display of the external input device

FIG. 3 is a configuration diagram of a conventional bath water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water amount sensor 2 Water temperature sensor 3 Hot water supply heat exchanger 4 Hot water supply sensor 5 Water amount control valve 8 Hot water supply burner 9 Bath sensor 11 Bath heat exchanger 12 Outgoing passage 13 Return passage 14 Water level sensor 15 Switching valve A (two-way valve) 18 Bath burner Reference Signs List 20 hot water supply solenoid valve 22 switching valve B (bypass three-way valve) 23 upper going passage 24 switching valve C (drainage three-way valve) 27 filtration tank 28 lower going passage 29 switching valve D (forward / reverse three-way valve) 30 drainage passage 31 external input device 32 Circulation pump

Continued on the front page (72) Inventor Kazunori Sone 1006 Kadoma Kadoma, Kazuma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Reference) 3L024 CC02 DD06 DD17 DD22 DD27 DD32 FF02 GG05 GG06 GG12 GG24 HH42 HH45

Claims (7)

[Claims] 1. A hot water supply heat exchanger for heating water supply, a water temperature sensor provided in a water supply passage for detecting a supply water temperature and a water amount sensor for detecting supply water flow rate, and a hot water supply provided in a tap water supply passage for detecting hot water temperature A hot water supply control valve for controlling a sensor and a tapping flow rate, a bath heat exchanger for heating circulating water, a return passage through which circulating water flows from the bathtub to the bath heat exchanger, and a water level sensor for detecting a water level of the bathtub. A circulating pump for circulating bath water, a bath sensor for detecting the temperature of the bath water, a switching valve A for switching a passage to the bath, and a hot water supply electromagnetic provided in a passage connecting a hot water supply passage and a return passage. A valve, an upper going passage and a lower going passage provided on the downstream side of the bath heat exchanger, a switching valve B for switching between the upper going passage and the lower going passage, and a switching valve provided in the upper going passage, respectively. And a drainage passage provided on each downstream side of the switching valve C and connected to a filtration tank having a filtering material and an aluminum electrode and an outgoing passage, and a switching provided at a junction of the filtration tank and the lower outgoing passage. Valve D;
An outgoing passage through which the circulating water flows from the switching valve D to the bathtub, an external input device capable of inputting an operation mode and setting a temperature and a water level of the bathtub water, and hot water heated by the hot water supply heat exchanger. A bath water heater comprising backwash means for the filtration tank for draining water from the hot water supply electromagnetic valve to the lower going passage, the switching valve D, the filter tank, the switching valve C, the drain passage, and the outward passage to the bathtub. 2. The bath water heater according to claim 1, wherein when the value of the water level sensor becomes equal to or less than a predetermined value, back washing is automatically performed. 3. The bath water heater according to claim 1, wherein when the value of the water level sensor becomes equal to or less than a predetermined value, the back washing is automatically performed after a lapse of a predetermined time. 4. The bath water heater according to claim 1, wherein when the value of the water level sensor becomes equal to or less than a predetermined value, back washing is performed by operating a switch of an external input device. 5. When the value of the water level sensor falls below a certain value, the automatic backwashing means for automatically performing backwashing is temporarily stopped by a switch operation of an external input device, and the switch operation is performed again. The bath water heater according to claim 2, wherein the back washing is performed by: 6. The bath water heater according to claim 1, wherein when the value of the water level sensor does not fall below a certain value for a long period of time, a display urging drainage of bathtub water is displayed on an external input device. 7. When the value of the water level sensor does not fall below a predetermined value for a long period of time, a display urging the drainage of bathtub water is displayed on an external input device. The bath water heater according to claim 6, which performs washing.