JPH03204557A - Hot water supplying apparatus for bath - Google Patents

Abstract

PURPOSE:To correct an initially set bath-preparation time and make the bath ready at reserved time by circulating remaining water in a bathtub before predetermined period of reserved time if the remaining water is contained in the bathtub, and detecting the temperature of the remaining water. CONSTITUTION:When water 25 in a bathtub is raised to a position of an adapter 20, the output of a water level sensor 17 is raised. When a predetermined water level is raised, a circulation mode is started, and a return tube 24 is filled with water. When the mode is ended, hot water is again supplied. When a set water level is obtained, the mode is again started. If the hot water temperature is lower than the set hot water temperature, a burner is additionally burned to heat the water. The water supplying quantity QT to the set water level and boiling-up time TA are stored in a memory circuit. Since the time from the start of automatically supplying hot water to the boiling-up is TA, if the quantity QT is detected by a water quantity sensor Q, the boiling-up is completed at the reserved time if the TA is employed when remaining water is not contained in the bathtub next time. If the remaining water is contained, the remaining hot water quantity is calculated by the hot water temperature rise per unit time, the time of additional hot water supplying amount is added so as to boil up at the set time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a bath water supply device that automatically fills a bathtub with hot water at a scheduled time.

BACKGROUND OF THE INVENTION Conventional bath water heaters of this type perform a boiling operation as shown in FIG. 5, for example. To explain the details, for example, if you want to boil a bath at 8 p.m. to the water level and temperature set with a fluoro remote control (not shown), etc.
A typical bath reservation timer is such that automatic hot water pouring starts T1 (for example, 30 minutes) before 8:00 pm.

Problems to be Solved by the Invention However, with the above-mentioned method, it has not been possible to automatically fill the bathtub with hot water at the reserved time due to the current increase in the size of bathtubs. Generally, hot water is often automatically poured into the bathtub from an "empty" state, so this case will be explained first.

In other words, in general, bathtubs have gradually become larger from single-person bathtubs that automatically pour about 1 sol into a bathtub with a full water capacity of 2401 cm. For example, large bathtubs with a full water capacity of over 6001 cm have improved the standard of living. As a result, acceptance has come to be accepted in the world.

This means that simply starting automatic hot water supply a certain predetermined time (T1) earlier than the pre-scheduled time as in the conventional example would not allow each household to boil water at the desired time. Have difficulty. By the way, the automatic hot water pouring amount of the bath water heater is now set to Q1 = 101 J/mrn, and the set water temperature θ1-42°C is set by the bath water heater's F OIJ moco/etc., and the set water temperature is set regardless of the water inlet temperature. In a controlled bath water heater, the time during which hot water can be poured automatically is graphed as shown in Figure 6. This means that if you simply start the bath with T1 = 30 minutes, 1'f' + smell, than when you made a reservation at 7, you will be given 400 (' It is good for storing water, but in a bathtub smaller than 300 t', it will take up a lot of space.For example, in a bathtub with a heat retention function, the heat radiation loss is wasted and it is not energy saving.On the other hand, the above 3QOl A larger bathtub (e.g. 6oo
In the case of 1), even after the reserved time, the set amount of hot water will not reach the set temperature, and even if you try to take a bath at the reserved time, you will not be able to take a bath. There will be no.

Furthermore, when there is residual hot water in the bathtub, the situation is different from the above case. This is because, in general, the output of bath water heaters is large on the hot water supply side, with an output of 36 g and 001 cal/h, whereas on the bath side, the output is small, with an output of g and 001 cal/h. Generally, when there is hot water left in the bathtub, the bath heat exchange circuit circulates the hot water to catch up with the bath burner at the set water temperature, and then the remaining capacity for the set water level is poured by the hot water supply side. . In other words, if there is hot water left in the bathtub (then it will take a lot of time to catch up with the bath bar).For example, 1801
．． If the remaining hot water at s°C is chased with a bath burner with an output of 9,0007/h, the following]m will be obtained (the boiling temperature is 42°C).

It takes more time to fill up the bath burner, that is, when there is remaining hot water, than it takes to pour it in automatically.

The present invention solves the above-mentioned conventional problems, and it is possible to always set the desired time (
τThe present invention provides a bath water heater that can heat a bath.

Means for Solving the Problem In order to achieve the object, the present invention provides a preset boiling reservation time T. - a timer device that generates a start signal at time T1, a water level measuring device that searches for (')W'X in the bathtub and generates a detection signal in response to the presence or absence of water in the bathtub; A determination circuit that generates a command signal for operation using the start signal as input, and the boiling time at the time of the previous boiling time 1'Q l', the circuit, and 1iiT.
i'1i-
j at the same time [, wrapping O boiling time TA and pouring tt
When QT is stored, a timer device generates a start signal for bathtub water circulation before time T3 of the reserved time, and a temperature detection means detects the temperature of bathtub water after bathtub circulation.
A timer device is provided to correct T1.

Effect As mentioned above, if the T1 time mentioned above is corrected to the learned boiling time (TA), it means that the size of the bathtub at home when there is no remaining hot water is learned, and as a result, the set It is possible to boil it on time. Similarly, even if there is remaining hot water, the bath crab is fixed while the remaining hot water is being chased, so the remaining amount of hot water is calculated based on the rise in water temperature per unit time, and the amount of additional pressure water is calculated based on the amount of additional pressure water. By adding , it is possible to learn the boiling completion time when there is remaining water and boil the water at the set time.

EMBODIMENTS Hereinafter, one embodiment of the present invention will be briefly described with reference to the drawings. 1 is a bath water heater, and supplied water is heated via a water amount sensor 2 through a hot water heat exchanger 3 which is heated by a burner. The temperature of the incoming water at this time is detected by the incoming water thermistor 4, and the temperature of the hot water controlled by the water flow control valve 5 so as to reach a predetermined water temperature is confirmed by the thermistor 6 on the outlet side. This hot water is divided into two streams, one being the hot water tap 7 and the other being the hot water tap 8.
guided through. The other side of the divided hot water is passed through the check valve 9, the vacuum breaker 10, and the check valve 11 to the three-way valve 12.
The automatic pouring of hot water can be turned on and off using the hot water supply valve 13. When automatically pouring hot water into the bathtub 21, use the three-way valve 12.
Valve A14 and valve B15 are open and valve C16 is closed, and while the water level sensor 17 detects the rise in the water level in the bathtub 21, the water is guided to the bathtub 21 by the bath adapter 20 via the bath pipe 19 via the bath heat exchanger 18. It will be destroyed. In addition, when recharging, valve B1s and valve C1 of the three-way valve 12 are
6 is open, valve A14 is closed, and in this state, the pump 22 is turned on, and the flow switch 23 is turned on.
Checks the circulation status of the bathtub water. The bathtub water 25 is passed through the return pipe 24 and heated by the bath heat exchanger 18 which is heated by a burner.

FIG. 2 shows "the water level rise, the output of the water level sensor 17, and the movement of the three-way valve 12" in this embodiment. When the bathtub water 25 rises to the position of the adapter 20, the water level sensor 1
7's output begins to rise. When the predetermined water level rises, the circulation mode 0)) is entered and the return pipe 24 is filled with water. When the circulation mode (b) ends, hot water is poured again, and when the set water level is reached, the circulation mode returns to 0)), and when the water temperature is lower than the set water temperature, reheating is performed to bring the water to a boil. Here, the amount of water poured to the set water level (QT) and the boiling time (TA
) is stored in the memory circuit.

Here, the time from the start of automatic pouring to the boiling point is TA.
Therefore, if the amount of poured water QT is detected by the water amount sensor Q, then next time when there is no remaining hot water in the bathtub, if TA is used instead of T1, boiling will be completed at the scheduled time.

In addition, the average amount of hot water when boiling the above-mentioned amount of hot water QT with TA is determined by C&/TA. Strictly speaking, the time required to pour QT is equal to TA minus the circulation or reheating time, which must be divided by the pouring amount QT, but since the time for circulation and reheating is smaller than TA, Hot water amount QT
It can be said that it is a time term QT/TA just by pouring it into a bath.

Reference numeral 26 is a bath remote control, which allows the water level and temperature of the bathtub to be set.

FIG. 3 is a control block diagram including the bath remote control 26 in FIG. 1. The bath remote control 26 includes a water level setting device 2.
7 and a hot water temperature setting device 28, usually the operation switch 26a
Automatically fills the water by pressing . Now, in order to boil the bath at the reserved boiling time T0 (not shown), it is necessary to
minute) Timer device 29 to start operation at an early time
It consists of

The water level detection device 3o includes a water level sensor 17, and the bathtub 2
Water level 25 within 1 is detected. The operation control device 31 has a boiling time (TA) memory circuit 32 and a quantity of water poured into the bathtub 21 (QT) memory circuit 33, which stores the boiling time TA and quantity QA of water poured during the previous automatic hot water filling. It is something that

Now, the presence or absence of memory is checked by the memory presence/absence check circuit 34 of "Pre-TA-Q memory presence? Check". If not, the presence or absence of memory is checked by the "remaining water presence/absence check" circuit 35, and if there is no remaining water, initial settings are made. There is a timer device that adopts T1.36 and corrects it to T2.37 when there is residual hot water.

On the other hand, by "TA-QA memory memory? Check" 34,
If there is memory, it is further divided by "remaining hot water check" 38, and if there is no remaining hot water, the initial settings T1 and 36 are changed to T1.
It is corrected to A.39, and when there is remaining hot water at 9:00, it is TB.40.
It consists of a timer device 29 that corrects the

A determination circuit 41 that performs determination using the water level detection device 30 and timer device 29 described above transmits the corrected signal to the operation control device 3.
1, and the operation side device 31 controls the combustion amount device 42 with the combustion amount regulator 43 and the pouring amount regulator 4.
4 is opened. In order to determine TB·4°, check circuit 46 for arrival before time Ts and circulation device 47. Temperature detection means 48. A calculation means 45 is provided to calculate TB, which will be described later.

In the present invention, at time T, wait 30 minutes, 2 hours, T2 hours) iJl
I is set. In addition, "Do you remember TA/QA? Chie...
If there is no remaining water, the time T1 is corrected to TA and the boiling operation is started using the memory check circuit 34 of each storage circuit for the boiling time TA and pouring amount QT. If the pouring amount QA for the adapter 20 years old remains below the center of the second M adapter 20, the water level sensor 17 will not detect the water level, so the setting is made as early as possible to determine that there is no remaining water. Reached the water level, Note, % Note for QA? The soil boils as quickly as possible for 8 hours.1 Generally, during reserved operation, the outflow pipe 19, return pipe 24, and bathtub 21 are usually cold, and the remaining water in the vQA is not detected in the above-mentioned pouring water. It is also possible to add a value such as boiling time TA - 5 minutes instead of TA, taking into account minutes and insect loss.

Now, a case where there is residual hot water in the bathtub 211 will be explained with reference to FIG. If there is a remaining hot water amount Q1 in the bathtub 21, generally, the remaining hot water amount Q1 is drained from the current residual water temperature θ2 to the set hot water temperature (for example, 42°C), and then additional notes are added to the set hot water temperature. The amount of hot water Q2 is determined by the temperature θ3 (for example, 42'C
) and then boil the water at the set water temperature (for example, 42°C) using the set pouring amount QTt.

At this time, the reheating time TQ1 for the remaining hot water amount Q1 is as follows.

Now, the input of the bath burner is 12000 kl/h.
If n = 75%, it becomes 1, [12,000 yen/hx0.75].

The bath's human power is 12,000 hours, which is the refill time per hour.

As a means of detecting the temperature of the remaining hot water, the reserved time T is used as shown in FIG. A check circuit 46 for checking whether the arrival time is before a certain fixed time Ts (for example, 60 minutes)
If it is not before the time TB, the hot water is on standby in that trench, and if it is before the time TB, the remaining hot water is circulated by the circulation device 4a. Since the circulation circuit is equipped with a thermistor (not shown),
A method of detecting the true residual temperature Ii'i'j temperature using the temperature detection means 28 including the therminutor will be described. Now, it is assumed that the bathtub is circulated by the circulation means 47 and the temperature θ2 of the remaining hot water is detected by the temperature detection means 48. Bath output 1
2000X0.76=9000-/h If the combustion rate is
It can be found by calculating the time it takes to raise the temperature by 1''C from 2 to i.J:, If it takes X minutes to raise the temperature to 1'C under the following conditions, the remaining 1 scratch・δQ4
is as follows.

Since the water level can be determined from the output of the water level detection device, it can also be determined by proportional distribution.

On the other hand, the pouring time of Q2 - TQ2 is the average pouring amount, which can be calculated by a microcomputer (not shown) as long as QT and QA are recorded and injected.

The boiling time TB when there is remaining hot water shown in Figure 4 is:
If the bath output is 9000 krl/h, τB-TQ
20TQ1 In other words, it becomes 5, °, Q, ==15oxCe] TA.

Here, it is sufficient to substitute 01=150x.

Regarding TQ2, if the remaining hot water is close to the set water level or the output of the hot water burner is very large compared to the bath burner, TQ2 is ignored and TB"TQ
One method is to have a microcomputer calculate it using a simplified formula for l. Of course, considering heat radiation loss etc., for example, T
It is also effective from a microcomputer's calculation point of view to further add a correction of 1+6 minutes to B dust T.

Effects of the Invention As described above, according to the present invention, the following effects can be expected.

It has a boiling time memory circuit and a water pouring amount memory circuit, and if there is water left in the bathtub, the bathtub is circulated for a certain period of time before the reserved time and the temperature of the remaining water is accurately detected, allowing the initial boiling time to be set. By correcting the rising time T1 to TB, the boiling can be made at the reserved time.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the bath water heater of the present invention;
Figure 2 is a relationship diagram showing the water level rise, water level sensor output, and movement of the three-way valve, Figure 3 is the control block diagram, Figure 4 is the remaining hot water state diagram, Figure 6 is the flowchart of the conventional example, and Figure 6 is the flowchart of the conventional example. FIG. 6 is a diagram showing a rise of 9 errors in the conventional example. 27... Water level setting device, 29... Timer device, 30... Water level measuring device, 31...
...Operation control device, 32...Boiling time memory circuit, 33...Pouring amount memory circuit, 41...
...Judgment circuit, 46... Arrival check circuit before time Ts, 47... Circulation device, 48...
Temperature detection means, 46... Calculation means.

Claims (1)

[Claims] A timer device that generates a start signal at a preset boiling reservation time T_0-T_1, and a detection signal that searches for the presence or absence of residual water in the bathtub and corresponds to the presence or absence of residual water in the bathtub. a determination circuit that receives the detection signal and the start signal as input and generates an operation command signal;
When the operation control device includes a previous boiling time memory circuit and a previous water pouring amount memory circuit, and the water level detection device detects that there is water in the bathtub, the boiling time T_A
and the amount of poured metal Q_T, the above reserved time T_
A circulation device that generates a start signal for bathtub water circulation before a fixed time T_s of 0, a temperature detection means that detects the temperature of the bathtub water after the bathtub water circulation, and a calculation formula T_B=Q_T×(set temperature− A bath water supply device having a timer device and a means for correcting the boiling time T_B based on bath water temperature)/bath output.