JP3997705B2 - Hot water storage water heater with bath hot water function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hot water storage type water heater capable of bathing a bathtub.
[0002]
[Prior art]
Conventionally, as shown in FIG. 5, this type of hot water storage water heater with a bath hot water filling function is a hot water storage tank 1, a remaining hot water thermistor 2 for detecting the amount of hot water in the hot water storage tank 1, and hot water in the hot water storage tank 1. A heater 3 for boiling water, a mixing valve 4 for mixing hot water in the hot water storage tank 1 and water from another circuit to a set temperature, a hot water thermistor 5 for detecting the mixed hot water temperature, and a mixed hot water bath 6 A hot water pipe 7 that drops into the bath, a flow rate valve 8 that adjusts the amount of hot water that falls into the bathtub, and a control unit that performs boiling control of the hot water storage tank 1 and bath hot water control according to signals from the remaining hot water thermistor 2 and hot water thermistor 5. 9 is composed.
[0003]
The general idea is that all the water filled in the hot water storage tank 1 is boiled in the midnight time zone where the electricity rate is low, and the hot water used in the daytime time is covered. Therefore, the capacity of the hot water storage tank 1 has been selected so as to match the upper limit of the amount of hot water used per day.
[0004]
[Problems to be solved by the invention]
However, the above-mentioned conventional hot water storage type hot water heater requires a large hot water storage tank that matches the upper limit of hot water usage, so the outer shape of the product is increased, a large installation space is required, and the initial cost is increased. There was a problem to do. In order to solve this problem, when the hot water storage tank is downsized, it is necessary to cope with running out of hot water, and in preparation for a large amount of hot water such as bath hot water, by boiling up frequently, a certain amount of hot water can be secured. It is necessary to keep. For this reason, the hot water tank is almost in a heated state, so there is only a small amount of water left in the hot water tank in the hot water tank during the midnight hours when electricity prices are cheap. A problem arises that the ratio of boiling increases and the running cost increases.
[0005]
The present invention solves the above-mentioned problem, selects the tank capacity based on the amount used when bathing is hot water, and reduces the size of the hot water storage tank. By changing the amount of remaining hot water at the start of the next boiling in the belt, the minimum amount of hot water is ensured even when the hot water storage tank is downsized, and the ratio of boiling is reduced during the daytime hours when electricity charges are high. The purpose is to reduce running costs.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a hot water storage tank, a residual hot water thermistor for detecting the amount of hot water in the hot water storage tank, heating means for boiling up the hot water in the hot water storage tank from above, and hot water and water in the hot water storage tank. A mixing valve for mixing the hot water, a hot water thermistor for detecting the temperature of the mixed hot water, a pouring pipe for dropping the mixed hot water into the bathtub, a flow valve for adjusting the amount of hot water dropped into the bathtub, the remaining hot water thermistor, and the hot water thermistor And a control unit for controlling the boiling of the hot water storage tank and the bath hot water control according to the signal of, and the operation unit, when the bath hot water control is performed during the daytime power supply time period, The amount of remaining hot water that starts boiling in the daytime time zone is changed to a smaller amount than the amount of remaining hot water that starts boiling.
[0007]
According to the above invention, even when the hot water storage tank is downsized in order to reduce the installation space and initial cost, the heating in the daytime power supply time period prevents the hot water from running out by detecting the bath hot water filling control. Therefore, it is possible to secure the water to be boiled in the hot water storage tank in the hot water storage tank at midnight, so that the running cost increase can be minimized. And when optimizing the installation space, initial cost and running cost, the running cost increase due to the miniaturization of the hot water storage tank can be reduced, so the capacity of the hot water storage tank can be reduced and the total cost reduction In addition, the installation can be improved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
A hot water storage type water heater with a bath hot water function according to claim 1, a hot water storage tank, a remaining hot water thermistor for detecting the amount of hot water in the hot water storage tank, heating means for boiling up the hot water in the hot water storage tank from above, A mixing valve for mixing the hot water in the hot water storage tank, a hot water thermistor for detecting the mixed hot water temperature, a pouring pipe for dropping the mixed hot water into the bathtub, a flow valve for adjusting the amount of hot water dropped into the bathtub, The controller includes a control unit that performs boiling hot water tank control and bath hot water control according to signals from the remaining hot water thermistor and the hot water thermistor, and the control unit performs bath hot water control during the daytime power supply time period. In this case, the remaining hot water amount for starting boiling in the next daytime time zone is changed to a smaller amount than the normal boiling start residual hot water amount.
[0009]
And in the daytime power supply time zone, when the control unit detects bath hot water filling control, it changes the setting of the remaining hot water amount for boiling start in the daytime time zone to a lesser extent, while securing the amount used during bath hot water filling. Other than that, it can be used to the minimum necessary amount, and it should be boiled in the low-night time zone where electricity charges are cheap, minimizing unnecessary boiling after the bath is filled without running out of hot water Maximum water can be secured in the hot water storage tank.
[0010]
Further, in the hot water storage type water heater with a bath hot water function according to claim 2, when the hot water filling switch of the operation unit is operated during the daytime power supply time, the control unit has a remaining hot water amount to start the next boiling. Is changed to a value smaller than the normal boiling amount of remaining boiling water.
[0011]
And when the hot water filling operation is instructed by the hot water filling switch of the operation unit, the next boiling start remaining hot water amount setting is changed, so that the amount used when bath hot water is filled is ensured. Use amount other than can be minimized. For example, even if the hot water filling operation is interrupted in the middle, the next boiling start remaining hot water amount setting has been changed, so the boiling operation will not start unless the predetermined remaining hot water amount is reached, and the electricity charge It is possible to avoid a situation where a wasteful boiling operation is performed during a high daytime.
[0012]
According to a third aspect of the present invention, there is provided a hot water storage type water heater with a bath hot water function, which is provided with an input button for bath termination on the operation unit, and when this input button is operated, the bath hot water filling instruction signal is sent to the control unit. In the daytime power supply time period, the setting of the boiling start remaining hot water amount is changed to a small amount.
[0013]
Then, instead of using the bath hot water instruction signal on the operation unit, the user can directly change the setting of the amount of hot water to start boiling in the daytime power supply time by using the input button for bath termination. It can be arbitrarily selected, and it is possible to reliably cope with irregular bathing without running out of hot water.
[0014]
In addition, the hot water storage type hot water heater with bath hot water function according to claim 4 includes a water level sensor for detecting the bath water level, detects the water level of the bath every predetermined time, and there is a signal for bath hot water instruction. In addition, when the water level sensor detects that there is no hot water in the bathtub, the setting of the boiling start residual hot water amount is returned to the normal setting of the boiling start residual hot water amount during the daytime power supply time period. .
[0015]
And when the bath water level is detected every predetermined time and there is no hot water in the bathtub even when there is a bathing instruction signal from the operation section, the amount of remaining hot water to start boiling is set in the daytime power supply time zone. Since the setting is returned to the normal setting when there is no signal for bath hot water filling instruction, even when the bath hot water filling operation is performed twice a day, it is possible to cope with without running out of hot water.
[0016]
Moreover, the hot water storage type water heater with bath hot water function described in claim 5 includes a water level sensor for detecting the water level of the bathtub and a hot water thermistor for detecting the hot water temperature of the bathtub, and the water level of the bathtub every predetermined time. The detected data and the set temperature are compared, and if each comparison value exceeds the specified value and the water level and the hot water temperature of the bathtub are lowered, the water will boil in the daytime power supply time zone. The setting of the raising start remaining hot water amount is returned to the normal setting.
[0017]
Then, the water level and the hot water temperature of the bathtub are detected every predetermined time, the difference between the set water level and the hot water temperature is calculated, and if the water level and the hot water temperature of the bathtub are lowered beyond the predetermined value, In the daytime period, the setting of the amount of remaining hot water at the start of boiling is reset to the setting without the signal for filling the bath. It can be handled without any problems.
[0018]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0019]
Example 1
FIG. 1 shows a configuration diagram of a hot water storage type water heater with a bath hot water function according to Embodiment 1 of the present invention. 11 is a hot water storage tank, 12 is a plurality of remaining hot water thermistors arranged in the hot water storage tank to detect the amount of hot water in the hot water storage tank, and 13 is a circulation pipe provided to circulate the hot water in the hot water storage tank from the lower part to the upper part. , 14 is a circulation pump, and 15 is a heating means, which are arranged in the path of the circulation pipe 13. 16 is a mixing valve that mixes hot water in a hot water storage tank and water from another circuit at a set temperature, 17 is a hot water thermistor that detects the temperature of the mixed hot water, 18 is a bathtub, and 19 is a bath that drops the mixed hot water into the bathtub. A hot water pipe, 20 is a flow rate valve for adjusting the amount of hot water dropped into the bathtub, 21 is a control unit for controlling the boiling state of the hot water storage tank and bath hot water in response to signals from each thermistor, 22 is an operation unit, and 22a is a hot water switch. is there.
[0020]
Next, the operation and action will be described with reference to the flowchart of FIG. 2. First, in the boiling operation, water filled in the hot water storage tank 11 is caused to flow through the circulation pipe 13 by the circulation pump 14. At this time, by circulating from the lower part to the upper part while being heated by the heating means 15, the hot water storage tank 11 is boiled up in the laminated state sequentially from the upper part to the lower part. The amount of heated water is detected by a plurality of remaining hot water thermistors 12 arranged in a hot water storage tank. Basically, the boiling operation is performed at low-power hours at low power hours, and in the daytime hours, a bath-watering signal that requires a large amount of hot water in order to suppress boiling to a minimum to prevent running out of hot water. Is detected by the control unit 21 and the amount of remaining hot water at the start of daytime is changed to a small amount. Explaining in detail according to the flowchart, first, in step 1, it is determined whether or not the power supply time zone is a midnight time zone. If it is in the midnight time zone, the process proceeds to step 2 and the boiling start remaining hot water amount setting is set to the initial state. To do. In step 3, the whole amount is boiled by the above-described operation. Next, when it is determined in step 1 that it is not a midnight time zone, it is determined in step 4 whether or not the hot water filling switch 22a of the operation unit 22 is turned on. When it is turned on, boiling is started in step 9 Change the remaining hot water amount setting so that it is less than the initial state. Then, when it is detected that the remaining hot water amount has decreased to the remaining hot water amount setting changed by the remaining hot water thermistor 12, the boiling operation is started.
[0021]
As described above, when the hot water filling operation is performed during the daytime power supply time period, the next boiling-up control is performed using the remaining hot water thermistor 12 above the hot water storage tank 11, so After that, it is possible to reduce the running cost with the minimum necessary boiling operation and secure the necessary remaining hot water, so that the water to be boiled in the hot water storage tank 11 can be secured in the midnight hours without worrying about running out of hot water. Therefore, an efficient boiling operation can be performed.
[0022]
(Example 2)
FIG. 3 shows a configuration diagram of a hot water storage type water heater with a bath hot water function according to Embodiment 2 of the present invention.
[0023]
The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. An operation unit 22 has an input button 22b for ending the bath.
[0024]
The difference from the first embodiment is that the bath hot water filling instruction is not detected from the signal of the hot water filling switch 22a of the operation unit 22, but the user arbitrarily selects the daytime by using the bath end input button 22b provided on the operation unit 22. The point is that the amount of remaining hot water at the time of boiling is changed to a small amount.
[0025]
As shown in the flowchart of FIG. 2, after the hot water filling switch 22a is turned on in step 4 in the daytime period, when the bath end switch 22b is turned on, the boiling start remaining hot water amount setting is set to a smaller amount than the initial state in step 9. Change to In the above description, after confirming the state of the hot water filling switch 22a, the acceptance of the bath end switch 22b is determined. However, the setting of the boiling start remaining hot water amount is changed only by confirming the state of the bath end switch 22b. It may be.
[0026]
As described above, since the user can arbitrarily select the boiling control during the daytime, unnecessary boiling after bathing can be suppressed, and the water to be boiled in the midnight hours can be reduced. Although the fact that it can be secured in the hot water storage tank 11 does not change, it is possible to reliably cope with irregular hot water filling such as bathing in the morning and evening according to the actual use condition.
[0027]
(Example 3)
FIG. 4 shows a configuration diagram of a hot water storage type hot water heater with a bath hot water function according to Embodiment 3 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. 23 is a water level sensor for detecting the bathtub water level, and 24 is a hot water temperature thermistor for detecting the hot water temperature of the bathtub.
[0028]
The difference from the first embodiment is that the water level and hot water temperature of the bathtub are detected every predetermined time, and when there is no bath water or the difference between the set water level and the set hot water temperature is calculated, the difference exceeds the predetermined value. When the water level of the bathtub and the hot water temperature are lowered, the setting of the amount of remaining hot water at the start of boiling is returned to the normal setting when there is no bath hot water instruction signal even during the daytime power supply time. is there.
[0029]
As shown in the flowchart of FIG. 2, after the hot water filling switch 22a is turned on in step 4 in the daytime period, it is determined in step 6 whether or not the bathtub water level is secured above a predetermined water level. When it is determined, in step 9, the boiling start remaining hot water amount setting is changed so as to be less than the initial state.
[0030]
In addition, after the hot water filling switch 22a is turned on in step 4, the difference between the bath water level and the set value is obtained in step 7, the difference between the hot water temperature and the set value is obtained in step 8, and the obtained difference is greater than the predetermined value. When it is determined that the water level and the hot water temperature of the bathtub are low, the boiling start residual hot water amount setting is changed to be smaller than the initial state in step 9.
[0031]
Thereby, it is possible to reliably cope with irregular hot water filling such as bathing in the morning and evening according to the actual use condition without pressing the bath end input button 22b.
[0032]
【The invention's effect】
As described above, according to the hot water storage type hot water heater with bath hot water function described in claim 1, when the control unit detects bath hot water control during the daytime power supply time, Since the amount of remaining hot water at the start of heating is changed slightly, it is possible to minimize the amount of other usage while keeping the amount used when filling the bath, after the bath has been filled without running out of water. Unnecessary boiling can be minimized, and water to be boiled in the hot water storage tank can be secured to the maximum in the midnight hours when the electricity rate is low.
[0033]
Further, according to the hot water storage type hot water heater with bath hot water function described in claim 2, when the hot water filling operation is instructed by the hot water filling switch of the operation section, the next boiling start remaining hot water amount setting is changed. As a result, it is possible to reliably secure the amount used when bathing in the bath and minimize the amount used otherwise. For example, even if the hot water filling operation is interrupted in the middle, the next boiling start remaining hot water amount setting has been changed, so the boiling operation will not start unless the predetermined remaining hot water amount is reached, and the electricity charge It is possible to avoid a situation where a wasteful boiling operation is performed during a high daytime.
[0034]
Further, according to the hot water storage type water heater with a bath hot water function described in claim 3, the user can directly use the bath end input button instead of the bath hot water instruction signal of the operation unit to directly supply the daytime power supply time zone. Since the setting of the boiling start residual hot water amount is changed to a small amount, boiling control can be arbitrarily selected, and it is possible to reliably cope with irregular bathing without running out of hot water.
[0035]
Moreover, according to the hot water storage type water heater with bath hot water function described in claim 4, there is no bath water even when the bath water level is detected every predetermined time and there is a signal of bathing instruction from the operation unit. Even when the bath hot water filling operation is performed twice a day in order to return the setting of the boiling hot water remaining amount to the normal setting when there is no bath hot water filling instruction signal during the daytime power supply time period It can respond without running out of hot water.
[0036]
Moreover, according to the hot water storage type hot water heater with a bath hot water function described in claim 5, the water level and the hot water temperature of the bathtub are detected every predetermined time, the difference between the set water level and the set hot water temperature is calculated, If the water level of the bathtub and the temperature of the bath have fallen beyond the value of It is possible to cope with the lack of hot water after the bath has been dropped or when the bath water has decreased.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a hot water storage type water heater with a bath hot water function according to Embodiment 1 of the present invention. FIG. 2 is a flowchart showing an operation of the hot water storage type water heater with a hot water bath function according to the present invention. FIG. 4 is a block diagram of a hot water storage water heater with a bath hot water function according to the second embodiment of the present invention. FIG. 4 is a block diagram of a hot water heater with a hot water bath function according to the third embodiment of the present invention. Schematic diagram of a hot water storage hot water heater with a sign [Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Hot water storage tank 12 Remaining hot water thermistor 15 Heating means 16 Mixing valve 17 Hot water discharge thermistor 18 Bathtub 19 Pouring pipe 20 Flow valve 21 Control part 22 Operation part

Claims (5)

And the hot water storage tank, and the remaining hot water thermistor which detects the amount of hot water the hot water storage tank, a heating means for increasing boiling in stacked state the hot water of the hot water storage tank from the top, and a mixing valve for mixing hot water and water in the hot water storage tank, mixing a hot water thermistor which detects the temperature of hot water that is, note the hot water pipe On drop mixed hot water to the bathtub, and a flow valve for adjusting the amount of hot water to On drop into the bathtub, the remaining hot water thermistor, boiling of the hot water storage tank by a signal of the tapping thermistor And a control unit for performing hot water control and bath hot water control, and when the hot water hot water control is performed in the daytime power supply time zone, the control unit performs boiling in the next daytime time zone. A hot water storage type hot water heater with a bath hot water function that changes the amount of hot water to be started to less than the normal amount of hot water to start boiling.   The controller is configured to change the amount of remaining hot water to start boiling next time to a lesser amount than the normal amount of remaining hot water to start boiling when the hot water filling switch of the operation unit is operated in the daytime power supply time zone. 1. A hot-water storage water heater with a bath hot water function according to 1.   An input button for the bath end is provided on the operation unit, and when this input button is operated, the setting of the amount of remaining hot water to start boiling is changed to a small amount in the daytime power supply time period instead of the bath hot water filling instruction signal of the control unit The hot water storage type water heater with a bath hot water function according to claim 1, wherein   A water level sensor that detects the water level of the bathtub is provided, detects the water level of the bathtub every predetermined time, and when there is a bath hot water instruction signal, if the water level sensor detects that there is no hot water in the bathtub, The hot water storage type hot water heater with a bath hot water filling function according to claim 1, wherein the setting of the boiling start remaining hot water amount is returned to the normal setting of the boiling start residual hot water amount during the power supply time period.   It has a water level sensor that detects the water level of the bathtub and a hot water temperature thermistor that detects the hot water temperature of the bathtub, detects the water level and hot water temperature of the bathtub every predetermined time, compares the detected data with the set value, The setting of the boiling start residual hot water amount is returned to the normal setting in the daytime power supply time period when each comparison value exceeds a predetermined value and the water level and hot water temperature of the bathtub are lowered. Hot water storage type water heater with bath hot water function.

Images