JP2000161771A - Hot water supply apparatus for bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep bath supply water in a clean state constantly by providing a control means presenting an indication of washing on an external input unit when the level of current conducting through an aluminum electrode drops below a reference level thereby removing scale from the surface of the alumi num electrode and notifying a correct washing timing to a user. SOLUTION: When the washing switch of an external input unit 31 is depressed in order to clean bathtub water, bathtub water pumped up by a circulation pump 32 is circulated through a return path 13, a water flow switch 10, a bath heat exchanger 11, a bypass three-way valve 22, a supply passage 23, a filtering tank 27 including a filtering material 25 and an aluminum electrode 26, and the like. When the aluminum electrode 26 in the filtering tank 27 is conducted, dirt and bacteria in the bathtub water are aggregated and removed through the filtering material 25. When the current conducting through the aluminum electrode 26 drops below a reference level, a decision is made that scale is adhering to the surface of the aluminum electrode 26 and an indication of washing the aluminum electrode 26 is presented on the external input unit 31.

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 heat in a hot water supply heat exchanger 3, passes through a hot water supply sensor 4 and 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.

[0004] 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.

When the additional heating switch of the external input device 31 is pressed, the bath water is recirculated by the circulating pump 32 to the bath connection adapter 19, the return passage 13, the water level sensor 14, the switching two-way valve 15, Bath sensor 9, water switch 10, bath heat exchanger 11, bypass three-way valve 22, lower going passage 28, forward / reverse three-way valve 29, going passage 12, bath connection adapter 19 circulates, and bathtub water bath sensor 9 When the temperature of the hot water detected in step (1) decreases, the gas passes through a bath source solenoid valve (16) and a bath proportional valve (17), burns in a bath burner (18), absorbs heat in a bath heat exchanger (11), and adds water to the bathtub. Perform the fire.

When the purifying switch of the external input device 31 is depressed, bath water is purified by the circulating pump 32 by the bath connection adapter 19, the return passage 13, the water level sensor 14, the switching three-way valve 15, and the bath sensor. 9. Water flow switch 1
0, bath heat exchanger 11, bypass 3-way valve 22, upper access passage 23, drain 3-way valve 24, filter material 25 and aluminum electrode 2
Tank 27 equipped with a filter 6, a three-way valve 29, and a passage 1
2. Circulates with the bath connection adapter 19 and the circulating water
When passing through 7, the aluminum electrode 26 in the filtration tank is energized to aggregate the dirt and bacteria accumulated in the bathtub, and the aggregated foreign substances can be removed by the filter medium 25 in the filtration tank. The bathtub water can always be kept clean even if a person takes a continuous bath.

Further, in order to periodically discharge the foreign matter removed by the filter medium 25 in the filter tank to the outside of the apparatus, the hot water heated by the hot water supply heat exchanger 3 is supplied from the hot water supply electromagnetic valve 20 to the lower going passage 28, the forward and reverse three-way. The water is drained from the valve 29, the filtration tank 27, the three-way drainage valve 24, and the drainage passage 30 to the outside of the machine, and backwashing is performed.

[0008]

However, in the conventional bath water heater, when current is repeatedly applied to the aluminum electrode 26 in the filtration tank, the scale adheres to the surface of the aluminum electrode 26 and the current flowing through the aluminum electrode 26 is reduced. The value has decreased, and dirt and bacteria accumulated in the bathtub cannot be aggregated, and the bathtub water cannot always be kept clean even when a plurality of people take a bath continuously.

[0009]

According to the present invention, in order to solve the above-mentioned problems, a bath water heater according to the present invention displays a washing indication on an external input device when a current value supplied to an aluminum electrode falls below a reference value. It is provided with control means.

According to the above invention, when the value of the current supplied to the aluminum electrode falls below the reference value, a display of cleaning is displayed on the external input device, and the user removes the scale on the surface of the aluminum electrode by performing the cleaning. Aggregates dirt and bacteria that accumulate in the bathtub, and the agglomerated foreign substances can be removed by the filter media in the filter tank, keeping the bathtub water clean and clean even if multiple people continue bathing. it can.

[0011]

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 that detects the water level in the bathtub, a circulation pump that circulates the bathtub water, a bath sensor that detects the temperature of the bathtub water, a two-way valve that switches the bath passageway, and a hot water supply path and return A hot water supply solenoid valve provided in a passage connecting the passages, an upper going passage and a lower going passage provided downstream of the bath heat exchanger, and a bypass three-way switching between the upper going passage and the lower going passage. And a drainage three-way valve provided in the upper outgoing passage, and a drainage passage provided on each of the downstream sides of the three-way drainage valve, the drainage passage being connected to a filtration tank having a filtering material and an aluminum electrode and the outbound passage, and this filtration tank A forward / reverse three-way valve provided at the junction of the lower outgoing passage, a bath adapter connecting the return passage and the outgoing passage to a bathtub, a forward passage through which circulating water flows from the forward / reverse three-way valve to the bathtub, It is equipped with an external input device that can enter the mode and set the temperature and water level of the bathtub water, and a control means that displays a wash on the external input device when the current value supplied to the aluminum electrode falls below the reference value. is there.

When the value of the current supplied to the aluminum electrode falls below the reference value, an indication of cleaning is displayed on the external input device.
The user removes the scale on the surface of the aluminum electrode by washing, aggregates dirt and bacteria that accumulate in the bath, and removes the aggregated foreign substances with the filter media in the filtration tank. Even if you continue bathing, you can always keep the bathtub water clean and clean.

[0013] When the switch of the external input device is depressed when the display of washing is displayed on the external input device, the circulating pump automatically circulates bath water and includes the filter material and the aluminum electrode. It is provided with control means for washing the filtration tank for a certain period of time.

Then, when the washing is displayed on the external input device, the user presses the washing switch to automatically perform the washing operation, thereby removing the scale on the surface of the aluminum electrode and removing the scale in the bathtub. The accumulated dirt and bacteria can be aggregated, and the aggregated foreign substances can be removed by the filtering material in the filtration tank, and the bathtub water can be kept clean and clean even if a plurality of people take a continuous bath.

[0015] Further, after the filter tank is cleaned for a certain period of time, the cleaning means is completed when the current value supplied to the aluminum electrode exceeds a reference value, and when the current value is equal to or less than the reference value, the control means is again cleaned for a certain period of time. is there.

After the filter tank has been cleaned for a certain period of time, the cleaning is completed when the current value applied to the aluminum electrode exceeds a reference value, and when the current value is below the reference value, the cleaning is performed again for a certain period of time. The scale of
Aggregates dirt and bacteria that accumulate in the bathtub, and the agglomerated foreign substances can be removed with the filter media in the filter tank, and the bathtub water can always be kept clean even if multiple people take a continuous bath. .

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows Embodiment 1 of the present invention. In FIG. 1, water passes through a water amount sensor 1 and a water temperature sensor 2 from a water inlet, absorbs heat in a hot water supply heat exchanger 3, passes through a hot water supply sensor 4 and a hot water supply amount 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.

When the bath automatic switch of the external input device 31 as shown in FIG. 2 is pressed, the hot water of the set temperature absorbed by the hot water supply heat exchanger 3 is supplied to the hot water supply sensor 4 by the hot water supply sensor 4. 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 through the control valve 5.

When the reheating switch of the external input device 31 as shown in FIG. 2 is pressed, the bath water is recirculated by the circulating pump 32 to the bath connection adapter 19, the return passage 13, the water level sensor 14, Switching two-way valve 15, bath sensor 9, water flow switch 10, bath heat exchanger 11, bypass 3
The gas circulates through the direction valve 22, the lower going passage 28, the forward / reverse three-way valve 29, the going passage 12, and the bath connection adapter 19, and when the temperature of the hot water detected by the bath sensor 9 is lowered, the gas is discharged from the gas bath source. It passes through the solenoid valve 16 and the bath proportional valve 17, burns in the bath burner 18, absorbs heat in the bath heat exchanger 11, and
Reheat the bath water.

When the purifying switch of the external input device 31 as shown in FIG. 2 is pressed, bath water is purified by the circulating pump 32 by the bath connection adapter 19 and the return passage 1.
3, water level sensor 14, switching three-way valve 15, bath sensor 9,
Water flow switch 10, bath heat exchanger 11, bypass 3-way valve 22, upper access passage 23, drain 3-way valve 24, filter material 25
Tank 27 provided with aluminum electrode 26, forward and reverse three-way valve 2
9, circulates with the outgoing passage 12 and the bath connection adapter 19, and when the circulating water passes through the filtration tank 27, the aluminum electrodes 26 in the filtration tank are energized to aggregate dirt and bacteria that accumulate in the bath tub, thereby causing aggregation. The foreign substances thus removed can be removed by the filter medium 25 in the filter tank, and the bathtub water can always be kept clean even if a plurality of persons take a continuous bath.

The control means 21 controls the aluminum electrode 2
6, when the current value applied to the aluminum electrode 26 falls below the reference value of, for example, 200 mA, scale may adhere to the surface of the aluminum electrode 26, and it may not be possible to coagulate dirt and bacteria accumulated in the bathtub. There is an external input device 3
Indicate the washing in 1 and the user puts the detergent in the bathtub water and presses the reheating switch of the external input device to perform the washing, thereby removing the scale on the surface of the aluminum electrode and the current value of the aluminum electrode 26. 200mA or more, aggregates dirt and bacteria that accumulate in the bathtub, aggregated foreign substances can be removed with the filter media in the filter tank, even if multiple people continue bathing, bathtub water is always clean, It can be kept clean.

Further, when the washing instruction is displayed on the external input device 31, when the user puts the cleaning agent into the bathtub and presses the washing switch of the external input device 31, the circulation pump 32 is automatically turned on. This is very convenient because water can be circulated and the filter tank 27 having the filter medium 25 and the aluminum electrode 26 can be washed for one hour, for example, and automatically stopped.

Further, after the filtration tank 27 was washed for one hour, the current value applied to the aluminum electrode 26 was set to a reference value of 200.
When the current reaches mA or more, the cleaning is completed.
In the case of A or less, the scale on the surface of the aluminum electrode is surely removed by automatically washing again for one hour, the current value of the aluminum electrode 26 is maintained at 200 mA or more, and dirt and bacteria that accumulate in the bathtub are aggregated. In addition, the condensed foreign matter can be removed by the filter material in the filter tank.

[0025]

As described above, the bath water heater of the present invention
When the value of the current passed through the aluminum electrode falls below the reference value, a cleaning indication is displayed on the external input device, and the user removes the scale on the surface of the aluminum electrode by performing the cleaning, thereby removing dirt and bacteria accumulated in the bathtub. Agglomerated and agglomerated foreign substances can be removed by the filter medium in the filtration tank, and the bathtub water can always be kept clean even if a plurality of persons take a continuous bath.

[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. 2A is an external view illustrating an external input device of the water heater. FIG. 2B is an external view illustrating another external input device of the water heater.

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

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazunori Sone 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. F term (reference) 3L024 CC02 DD06 DD17 DD22 DD27 DD32 EE12 FF02 GG05 GG12 GG22 GG50 HH42 HH45

Claims (3)

[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 amount control valve for controlling a sensor and a tapping water 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 in the bathtub, A circulating pump for circulating bath water, a bath sensor for detecting the temperature of the bath water, a two-way valve for switching the bath path, a hot water supply solenoid valve provided in a path connecting a hot water supply path and a return path, An upper going passage and a lower going passage provided respectively on the downstream side of the bath heat exchanger, a bypass three-way valve for switching the upper going passage and the lower going passage, and a drainage three-way valve provided for the upper going passage. A drainage passage provided on each downstream side of the drainage three-way valve and connected to a filtration tank having a filter medium and an aluminum electrode and an outgoing passage, and a forward / reverse threeway provided at a junction of the filtration tank and the lower outgoing passage. A valve, a forward passage through which circulating water flows from the forward / reverse three-way valve to the bathtub, a bath adapter connecting the return passage and the forward passage to the bathtub,
An external input device capable of inputting an operation mode and setting a temperature, a water level, and the like of bathtub water, and a control unit that displays a display of cleaning on the external input device when a current value supplied to the aluminum electrode falls below a reference value. Bath water heater. 2. The control means according to claim 1, wherein when the switch is pressed when the indication of washing is displayed on the external input device, the circulating pump automatically circulates the bathtub water to wash the filtration tank for a predetermined time. Bath water heater. 3. The control means according to claim 1, wherein after the filter tank has been cleaned for a predetermined time, the cleaning is completed when the current supplied to the aluminum electrode exceeds a reference value, and when the current value is below the reference value, the cleaning is performed again for a predetermined time. The bath water heater described.