JP3812102B2 - Bath water heater - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bath water heater that can purify and sterilize bathtub water.
[0002]
[Prior art]
A conventional bath water heater has a structure as shown in FIG.
[0003]
In FIG. 4, water passes through the water amount sensor 1 and the water temperature sensor 2 from the water supply port, absorbs the heat of the hot water supply burner 4 with the hot water supply heat exchanger 3, passes through the hot water supply sensor 5 and the hot water supply water amount control valve 6, and from the hot water supply outlet. Released.
[0004]
The bathtub water is circulated by a circulation pump 7, a circulation adapter 8 attached to the bathtub, a return passage 9, a water level sensor 10, a switching three-way valve 11, a bath sensor 12, a water flow switch 13, a bath heat exchanger 14, an outgoing passage 15, and a circulation. When the temperature of the hot water detected by the bath sensor 12 circulates with the adapter 8 or when the reheating operation is performed by the remote controller, the bath burner 16 burns and the bath heat exchanger 14 absorbs the heat and bath water. Remembrance.
[0005]
The hot water that has been absorbed by the hot water supply heat exchanger 3 passes through the hot water supply sensor 5, the hot water supply water amount control valve 6, the hot water supply electromagnetic valve 17, the edge cut valve 18, and the bath heat exchanger 14. The circulation adapter 8 enters the bathtub through the passage 15, the switching three-way valve 11 and the return passage 9.
[0006]
FIG. 5 is a flowchart showing a sequence of automatic hot water application means of a conventional bath water heater. When performing automatic hot water operation with remaining hot water in the bathtub, the level of the remaining hot water is lower than the bathing set water level. After hot water is poured into the bathtub up to the bathing set water level, the bath is driven to the boiling set temperature. If the level of the remaining hot water is higher than the bathing setting water level, boil it up to the bathing setting temperature only by chasing.
[0007]
[Problems to be solved by the invention]
However, in conventional bath water heaters, it is unclean to continue using the hot water in the bathtub due to dirt accumulated in the bathtub and dirt of the hot water. To clean this, the hot water in the bathtub must be replaced. Therefore, it has a problem that it is a time-consuming work.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a return passage, a switching three-way valve, a bypass three-way valve, a bypass passage, a drainage three-way valve, and a drainage passage when performing automatic hot water operation from a state in which there is remaining hot water in the bathtub. After draining to the drain stop water level, the bath water is circulated to the return passage, switching three-way valve, bypass three-way valve, bath heat exchanger, drain three-way valve, forward passage, circulation adapter, and the bath heat exchange. It is sterilized by heating to a high temperature setting temperature with a vessel, and thereafter it is provided with automatic hot water heating means for supplying water or low temperature water to the bath setting water level and heating it to the bath setting temperature.
[0009]
According to the said invention, in order to heat the remaining hot water of a bathtub to high temperature, there exists a bactericidal action and it can keep bathtub water clean. In addition, after draining the remaining hot water to the drainage stop water level, replenishing the new hot water to the set water level at the time of bathing can reduce the remaining hot water stains, enable reuse, and extend the period of hot water replacement. Therefore, the trouble can be reduced.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The present invention can be implemented by the configurations described in the claims. That is, the invention according to claim 1 of the present invention includes a bath heat exchanger that heats the bath circulating water to warm water with a burner, and a return passage through which the bath circulating water flows from the circulation adapter attached to the bath to the bath heat exchanger. A water level sensor that detects the water level of the bathtub, a circulation pump that circulates the bathtub water, a hot water supply heat exchanger that heats the hot water to a hot water with a burner, and a hot water beam and a circulation path for the bath from the hot water heat exchanger Switching three-way valve for switching, bypass passage directly connecting the inlet side and outlet side of the bath heat exchanger, a bypass three-way valve for switching the bath heat exchanger and bypass passage, and a junction of the bypass passage and the outlet side of the bath heat exchanger A drain three-way valve provided downstream, a drain passage provided downstream of the drain three-way valve, and a forward passage through which the bathtub circulating water flows from the drain three-way valve to the circulation adapter, After passing through the return passage, switching three-way valve, bypass three-way valve, bypass passage, drainage three-way valve, drainage passage to the drain stop water level, the bath water is returned to the return passage, switching three-way valve, bypass three-way valve, bath Circulate to heat exchanger, drainage three-way valve, forward passage, circulation adapter, heat at high temperature set temperature at least above bath heat exchanger at 60 ° C or above at bath heat exchanger, then water or low temperature to bathing set water level It is equipped with automatic hot water heating means for supplying water to the bathtub and heating it to the bathing set temperature.
[0011]
And since the remaining hot water of a bathtub is heated to high temperature, it can sterilize remaining hot water and can keep bathtub water clean. In addition, after draining the remaining hot water to the drainage stop water level, replenishing the hot water to the set water level at the time of bathing can reduce the remaining hot water contamination and reuse, and lengthen the period of hot water replacement. Therefore, the trouble can be reduced.
[0012]
According to the second aspect of the present invention, after the bath water is discharged to the drain stop water level, the bath circulating water heated to the high temperature set temperature is retained in the circulation passage for a predetermined time so that the high temperature sterilization is continued for a predetermined time. Since the circulation passage is kept at a high temperature for a certain time, the sterilizing effect of the circulating water can be further enhanced.
[0013]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0014]
Example 1
FIG. 1 shows the configuration of the first embodiment of the present invention. Water passes through a water amount sensor 1 and a water temperature sensor 2 from a water supply port, absorbs heat from a hot water supply burner 4 with a hot water supply heat exchanger 3, and supplies a hot water supply sensor 5 and hot water supply. It passes through the water amount control valve 6 and is discharged from the hot water supply outlet.
[0015]
The bath water is supplied from the circulation pump 7 to the circulation adapter 8, the return passage 9, the water level sensor 10, the switching three-way valve 11, the bath sensor 12, the water flow switch 13, the bypass three-way valve 19, the bath heat exchanger 14, and the drainage. The bath burner 16 burns when the temperature of the hot water detected by the bath sensor 12 decreases or when a reheating operation is performed by a remote controller, which circulates with the three-way valve 20, the forward passage 15, and the circulation adapter 8, and the bath heat exchanger. The heat is absorbed at 14 and bath water is reclaimed.
[0016]
The hot water that has been absorbed by the hot water supply heat exchanger 3 passes through the hot water supply sensor 5, the hot water supply amount control valve 6, the hot water solenoid valve 17, the edge cut valve 18, the bypass three-way valve 19, and the bypass passage. 20, enters the bathtub from the circulation adapter 8 through the drainage three-way valve 21, the forward passage 15, the switching three-way valve 11, and the return passage 9.
[0017]
FIG. 2 is a flowchart showing the sequence of the automatic hot water means in the first embodiment. When performing automatic hot water operation with remaining hot water in the bathtub, if the remaining hot water level is higher than the drainage stop water level, Through the return passage 9, the switching three-way valve 11, the bypass three-way valve 19, the bypass passage 20, the drainage three-way valve 21, and the drainage passage 22, the water is discharged out of the vessel to the drainage stop water level.
[0018]
After drainage is stopped, the circulation pump 7 circulates the bath water into the circulation adapter 8, the return passage 9, the water level sensor 10, the switching three-way valve 11, the bath sensor 12, the water flow switch 13, the bypass three-way valve 19, the bath heat exchanger 14, and the three-way drainage. When the bath burner 16 is burned while being circulated with the valve 21, the outgoing passage 15, and the circulation adapter 8, and the bath sensor 12 detects the high temperature set temperature, the combustion of the bath burner 16 stops. That is, after the bath water is heated to a high temperature by the bath burner 16 to sterilize the bacteria in the bath water, the combustion of the bath burner 16 is stopped. Then, after the combustion of the bath burner 16 is stopped, the hot water solenoid valve 17 and the water solenoid valve 23 are opened, and water or low-temperature water is supplied to the bath set water level, and when the bath set temperature is not reached, the bath burner 16 is opened. Burn and boil to bathing set temperature.
[0019]
When the water level of the remaining hot water is equal to or lower than the drainage stop water level, the hot water supply electromagnetic valve 17 is opened and hot water at the bathing set temperature is supplied to the bathing set water level as before.
[0020]
(Example 2)
FIG. 3 is a flowchart showing the sequence of the automatic hot water heating means in the second embodiment. After the combustion of the bath burner 16 is stopped, a standby time is provided, the circulation passage is kept at a high temperature to enhance the sterilizing effect of the circulating water, and the hot water supply electromagnetic The valve 17 and the water electromagnetic valve 23 are opened, and water or low-temperature water is supplied to the bathing set water level. When the bathing set temperature is not reached, the bath burner 16 is burned and heated to the bathing set temperature.
[0021]
【The invention's effect】
As described above, the bath water heater according to claim 1 is heated to a high temperature after draining the remaining hot water of the bathtub to a predetermined water level, so that the bath water can be kept clean by sterilizing at a high temperature, After draining the remaining hot water to the specified water level, replenishing new hot water up to the set water level at the time of bathing can reduce the remaining hot water dirt, it can be reused, and the hot water replacement period can be extended. The trouble can be reduced.
[0022]
The bath water heater according to claim 2 can enhance the sterilizing effect by performing high temperature holding for high temperature sterilization in the invention according to claim 1 for a predetermined time.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a bath water heater in Embodiment 1 of the present invention. FIG. 2 is a sequence diagram of automatic hot water filling means of the bath water heater. FIG. 3 is an automatic hot water in a bath water heater in Embodiment 2 of the present invention. FIG. 4 is a block diagram of a conventional bath water heater. FIG. 5 is a sequence diagram of automatic hot water beam means for the bath water heater.
3 Hot water supply heat exchanger 7 Circulation pump 8 Circulation adapter 9 Return passage 10 Water level sensor 12 Bath sensor 14 Bath heat exchanger 15 Outward passage 19 Bypass three-way valve 20 Bypass passage 21 Drain three-way valve 22 Drain passage

Claims (2)

A bath heat exchanger that heats the bathtub circulating water to warm water with a burner, a return passage through which the bathtub circulating water flows from the circulation adapter attached to the bathtub to the bath heat exchanger, a water level sensor that detects the bathtub water level, and the bathtub A circulation pump that circulates water, a hot water heat exchanger that heats hot water with a burner, a switching three-way valve that switches between a hot water from the hot water heat exchanger and a circulation path of the bath, and an inlet of the bath heat exchanger A bypass passage that directly connects the side and the outlet side, a bypass three-way valve that switches between the bath heat exchanger and the bypass passage, a drain three-way valve that is provided downstream from the junction on the outlet side of the bypass passage and the bath heat exchanger, A drainage passage provided on the downstream side of the three-way valve, and a forward passage through which the bathtub circulating water flows from the drainage three-way valve to the circulation adapter, return the bathtub water, a switching three-way valve, a bypass three-way valve After draining through the bypass passage, drainage three-way valve, drainage passage to the drain stop water level, the bath water is returned to the return passage, switching three-way valve, bypass three-way valve, bath heat exchanger, drainage three-way valve, forward passage, circulation A bath water heater equipped with an automatic hot water heater that circulates to an adapter and heats it to a high temperature setting temperature with the bath heat exchanger, then supplies water or low temperature water to the bath setting water level to the bath temperature and heats to the bath setting temperature. . The bath water heater according to claim 1, wherein after the bath water is discharged to the drain stop water level, the bath circulating water heated to the high temperature set temperature is retained in the circulation passage for a predetermined time so that the high temperature sterilization is continued for a predetermined time.

Images