JP3103567B2 - Bath water heater - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath water heater having a function of boiling an automatic hot water beam into a bathtub at a reserved time.

2. Description of the Related Art A conventional bath water heater of this type performs a boiling operation as shown in FIG. 5, for example. For example, when the bath is heated to the water level and hot water set at 8:00 pm by a remote controller (not shown), the bath is automatically set to T ₁ (for example, 30 minutes) before 8:00 pm What started the operation of pouring is the operation of a general bath reservation timer.

SUMMARY OF THE INVENTION However, with the above-described configuration, it has not been possible to boil the automatic hot water beam accompanying the current enlargement of the bathtub at the reserved time. Generally, automatic pouring is often performed from an "empty" state of the bath tub, and this case will be described first.

That is, in general, a bathtub is approximately 1
Increasingly, 80 bathtubs with automatic pouring have become larger and larger, for example, large bathtubs with a water level of over 600 have been accepted by the world as their living standards have improved.

This means that simply starting the automatic hot water supply at a predetermined time (T ₁ ) earlier than the previously reserved time, as in the conventional example, should bring the water to the desired time for each household. It is difficult. Incidentally, the automatic hot water supply amount of the bath water heater is now set to Q ₁ = 10 / min, and the set hot water temperature θ ₁ set by a remote controller or the like of the bath water heater.
= 42 ° C., and in a bath water heater controlled to a set hot water temperature irrespective of the incoming water temperature, the time during which automatic hot water can be poured is summarized in a graph as shown in FIG. This means that simply starting the automatic pouring at a time T ₁ = 30 minutes earlier than the previously reserved time is good if the bathtub is able to accumulate about 300, but a bathtub smaller than 300 will boil too quickly. That is, for example, in a device having a function of keeping the heat, the heat radiation loss is useless and is not energy saving. On the other hand, in the case of a bathtub larger than 300 (for example, 600), the set amount of hot water will not be heated at the set hot water temperature even at the reserved time, so that the bath at the reserved time If you try to enter, you will not be able to take a bath.

Further, when the remaining hot water is in the bathtub, it is different from the case described above. This is because the output of the bath water heater is generally as large as 36,000 Kcal / h on the hot water supply side, whereas the output on the bath side is as small as 9,000 Kcal / h. Generally, when there is remaining hot water in the bathtub, the bath heat exchange circuit is circulated to drive out the hot water to the set hot water temperature by the bath burner, and then the remaining capacity for the set water level is poured by the hot water supply side. In other words, if there is remaining hot water in the bathtub, it takes more time to remove the hot water by the bath burner.
For example, if the remaining hot water at 180,5 ° C is driven out by a bath burner with an output of 9,000 Kcal / h, the result is as follows. (The boiling temperature is 42 ° C.) Bath burner removal time In other words, when there is remaining hot water, it takes longer than the time of dropping by automatic pouring.

The present invention is to solve the above-mentioned conventional problems, and to provide a bath water heater capable of always heating a bath at a desired time regardless of conditions such as the size of a bathtub and the presence or absence of remaining hot water. is there.

In order to achieve the means above object for solving the problems, the present invention includes searching a timer device for generating a start signal at Wakiagari reservation time T ₀ -T ₁ time point that is set in advance, the presence in the bathtub A water level detection device that generates a detection signal in response to the presence or absence of bathtub water, a determination circuit that generates an operation command signal by inputting the detection signal and the start signal, and a boiling time storage circuit at a previous time, An operation control device comprising a circuit for storing the amount of hot water at the previous time and a memory for storing the boiling time (T _A ) and the amount of hot water (Q _T ) when there is no remaining hot water in the bathtub at the last time; , in which so as to correct the T ₁ of the case of people each of the four combinations by the presence of the bathtub water remaining.

Operates as described above, by correcting the aforementioned T ₁ times water heating time has learned (T _A), will be has learned the tub size in no remaining water home, it is set as a result It is possible to boil at the same time. Similarly, even when there is remaining hot water, the bath output is fixed while the remaining hot water is driven out, so the remaining hot water amount is calculated by increasing the hot water temperature per unit time, and the time of the additional pouring amount is also determined. By adding, it is also possible to learn the boiling completion time when there is remaining hot water and to boil at the set time.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a bath water heater, and water is supplied through a hot water supply heat exchanger 3 which is heated by a burner via a water amount sensor 2 and is heated. At this time, the incoming water temperature is detected by the incoming water thermistor 4 and the water amount control valve 5 is controlled so as to reach a predetermined hot water temperature.
Is controlled by the thermistor 6 on the tapping side. This hot water is diverted, one of which is hot water tap 7
Through the switch 8. The other of the split hot water is guided to the three-way valve 12 via the check valve 9, the vacuum breaker 10 and the check valve 11, and the hot water supply valve 13 can automatically start or stop the hot water. Three-way valve 12 when automatically pouring water into bathtub 21
The valve A14 and the valve B15 are open, the valve C16 is closed and the bathtub 2
While the rise of the water level to 1 is detected by the water level sensor 17, the water is led to the bathtub 21 by the bath adapter 20 by the going pipe 19 through the bath heat exchanger 18. In addition, three-way valve at the time of chasing
Twelve valves B15 and C16 are open, and valve A14 is closed. Then, in this state, the pump 22 is turned on, and the circulation state of the bathtub water is checked by the flow switch 23. The bath water 25 is driven and heated via the return pipe 24 by the bath heat exchanger 18 heated by the burner.

FIG. 2 shows "water level rise, output of water level sensor 17 and movement of three-way valve 12" in this embodiment. When the bathtub water 25 rises to the position of the adapter 20, the output of the water level sensor 17 starts to rise. When the predetermined water level rises, the circulation mode (b) is entered, and the return pipe 24 is filled with water. When the circulation mode (b) ends, the molten metal is poured again. When the water reaches the set water level, the circulation mode (b) is set again. When the temperature of the hot water is lower than the set hot water temperature, the water is reheated and heated. Here, the pouring amount (Q _T ) up to the set water level and the boiling time (T _A ) are stored in a storage circuit.

Here, since the time from the start of automatic pouring to boiling is (T _A ), if the pouring amount Q _T is detected by the water amount sensor Q, if there is no remaining hot water in the bathtub next time, T T by employing the T _a to ₁ instead, it is boiling at the scheduled time to complete.
The average volume of the melt teemed when raising boiling the pouring amount Q _T at T _A is
It is given by Q _T / _{T A.} Strictly speaking, the time required for pouring Q _T is obtained by subtracting the circulation or pouring time from T _A , and the pouring amount Q _T must be divided, but the time for circulation and pouring is shorter than T _A. so small, it can be said that the pouring amount Q _T is poured into the bath only time ≒ Q _T / _{T a.}

Reference numeral 26 denotes a bath remote controller, which can set the water level of the bathtub.

FIG. 3 is a control block diagram including the bath remote controller 26 in FIG. The bath remote controller 26 has a water level setting device 27 and a hot water temperature setting device 28. Normally, when the operation switch 26a is pressed, automatic hot water is supplied. Now, the boiling reservation time
To get the bath to boil at T ₀ (not shown)
The timer device 29 starts the operation at a time T ₁ (for example, 30 minutes) earlier than the reserved boiling time T ₀ (for example, 30 minutes).

The water level detection device 30 includes a water level sensor 17 and detects a water level 25 in the bathtub 21. The operation controller 31, to water heating time (T _A) memory circuit 32 and tub 21 pouring amount (Q _T) has a storage circuit 33, the time T _A boiling at the previous automatic water beam
It is intended for storing and pouring amount Q _A.

Now, the presence / absence of memory is checked by a memory presence / absence check circuit 34 of “T _A / Q _T memory existence? Check”. If there is no memory, a circuit 35 of “remaining hot water existence check” 35 T ₂ · 37 when there is remaining hot water adopted the initial setting T ₁ · 36
There is a timer device to make correction.

On the other hand, by the "T _A · Q _A memory Yes? Check" 34, in the case of memory there is further divided by the "remaining hot water check" 38, if there is no remaining hot water is, the initial setting T ₁ · 36 T _A and corrects the 39, made of a timer device 29 for correcting the T _B · 40 when there remaining hot water.

The above determination circuit 41, which is determined by the water level detection device 30 and the timer device 29, feeds back the corrected signal to the operation control device 31, and the operation control device 31 sends the combustion control device 42 the combustion amount adjuster 43 and the pouring amount adjustment. Control unit 44. T _B
In order to determine 40, a calculation means 45 is provided to calculate T _B described later.

In the present invention, time T ₁ ≒ 30 minutes and time T ₂ = 1 hour are set. In addition, the circuit for checking whether or not each of the storage circuits of the boiling time T _A and the pouring amount Q _T of “T _A / Q _T storage existence? Check” is stored.
By 34, if there is no residual water, it starts the operation of the boiling to correct the time T ₁ to T _A. And if when there remains a pouring amount Q _A to the adapter 20 below the center of the adapter 20 of FIG. 2, the water level sensor 17 to quickly set water level by determining partial and no residual water does not water level detection reached, so that boil up as soon as pouring amount Q _a minute of pouring time. In general, at the time of reserved operation, the outgoing pipe 19, the return pipe 24, and the bathtub 21 are usually cold, and the above pouring amount Q _A
In consideration of the remaining water undetected portion and the heat dissipation loss, for example, a value such as the boiling time T _A -5 minutes may be inserted instead of T _A.

Now, a case where there is residual hot water in the bathtub 21 will be described with reference to FIG. If there is a remaining hot water Q ₁ is now bath 21, from generally be fired follow up the residue water temperature theta ₂ from the setting water temperature when the remaining hot water Q ₁ (e.g. 42 ° C.), the set hot water temperature automatically pouring additional pouring amount Q ₂ at a temperature theta _{3 (e.g.} 42 ° C.), there is a method of increasing boiling in set hot water temperature to the set pouring amount Q _T (e.g. 42 ° C.).

At this time, the driving time T _Q1 of the remaining hot water amount Q ₁ is as follows.

If the input of the bath burner is 12000Kcal / h and n = 75%, the bath output = 12000Kcal / h × 0.75.

It will be the flushing time when the bath input is 12000Kcal / h. The temperature of the remaining hot water at this time can be determined by circulating the temperature with a thermistor (not shown) provided in the circulation circuit. It should be noted that the above-mentioned Q ₁ is obtained from the following equation.

Now, the remaining hot water temperature and theta _2, bath output 12000 × 0.75 = 900
When burning at 0 Kcal / h, the remaining hot water quantity Q whose true value is unknown
₁ is determined by calculating the time to raise only water temperature 1 ℃ from remaining water temperature theta _2. 1 ° C under the above conditions
If you took x minutes to bring to boil, the remaining hot water Q ₁ is as follows.

In other words, Is required.

Further, as another means, when Q _T is stored, the water level of the Q ₁ is seen from the output of the water level detecting device, the proportioning Can also be obtained from

On the other hand, the pouring time of Q ₂ = T _Q2 Indicated by Here, Q _T / T _A is an average pouring amount, and as long as Q _T and T _A are stored, calculations can be performed by a microcomputer (not shown).

The boiling time T _B when there is remaining hot water shown in Fig. 4 is given assuming that the bath output is 9000 Kcal / h. Here, Q ₁ = 150x may be substituted.

Here, regarding T _Q2 , the remaining hot water is close to the set water level, or the output of the hot water supply burner is very large compared to the bath burner, so ignoring T _Q2 , the simplified formula of T _B ≒ T _{Q 1} Is also one method. Of course, it is also effective from the calculation of the microcomputer to further add a correction, for example, T _B ≒ T _Q1 +5 minutes in consideration of heat radiation loss and the like.

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

(1) In the case where the storage of claim boiling time according to 1 (T _A) and pouring amount (Q _T) are both no, when without the remaining water in the tub using a T _1, when there is remaining water to tub by correcting from T ₁ to a large T _2, to complete the uplink boiling time reserved, in particular, by the time of there remaining water in the bathtub to correct the T ₁ to T _2, the time when the reserved, T ₁ You can bring it closer and boil it up.

(2) In claim 2, both the boiling time (T _A ) and the pouring amount (Q _T ) are stored, and T ₁ is set when there is no residual water in the bathtub.
Corrected to T _A, by adopting the previous water heating time (T _A), it is possible to climb boiling closer to a more reserved time.

(3) In claim 3, both the boiling time (T _A ) and the amount of pouring water (Q _T ) are stored, and when there is residual water in the bathtub, T ₁
The by correcting the operation expression in T _B, it is possible to climb boiling at the scheduled time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a bath water heater of the present invention,
FIG. 2 is a relationship diagram showing the water level rise, the water level sensor output, and the movement of the three-way valve, FIG. 3 is the control block diagram, FIG. 4 is the remaining hot water state diagram, FIG. FIG. 6 is a graph showing the boiling error of the conventional example. 27 water level setting device, 29 timer device, 30 water level detection device, 31 operation control device, 32 boiling time storage circuit, 33 pouring amount storage circuit, 41 determination circuit, 45 ……
Arithmetic means.

(72) Inventor Sumio Ohara 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Munetaka Kinugasa 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside the company (72) Inventor Mitsuru Kuniyoshi 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Shigenobu Okuda 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Judge, Yoshiji Okubo, Judge, Osaka Gas Co., Ltd.Judge, Kohei Sakurai Judge, Okada Wakako (56) References JP-A-61-147051 (JP, A) JP-A-61-107048 (JP, A) 63-37955 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24H 1/00 602

Claims (3)

(57) [Claims] 1. A timer device for generating a start signal at a preset boiling reservation time (T ₀ ) -predetermined time (T ₁ ), a search for the presence or absence of residual water in the bathtub, and a search for remaining water in the bathtub. A water level detection device that generates a detection signal corresponding to the presence or absence, a determination circuit that generates an operation command signal by inputting the detection signal and the start signal, a boiling time storage circuit at the previous time, and a An operation control device including a pouring amount storage circuit, wherein the timer device stores the boiling time (T _A ) and pouring amount (Q _T ) when there is no remaining hot water in the bathtub at the time of the previous time. , Which corrects the T1 among the four combinations depending on the presence or absence of residual water in the bathtub, wherein the boiling time (T _A ) at the previous time and the pouring amount (Q _T ) at the previous time are corrected. When there is no remaining water in the bathtub when there is no memory It is kept at T _1, a bath water heater to correct the larger T ₂ than the T ₁ when the remaining water is available. 2. A timer device for generating a start signal at a preset boiling reservation time (T ₀ ) -a predetermined time (T ₁ ), a search for the presence or absence of residual water in the bathtub, and a search for remaining water in the bathtub. A water level detection device that generates a detection signal corresponding to the presence or absence, a determination circuit that generates an operation command signal by inputting the detection signal and the start signal, a boiling time storage circuit at the previous time, and a An operation control device including a pouring amount storage circuit, wherein the timer device stores the boiling time (T _A ) and pouring amount (Q _T ) when there is no remaining hot water in the bathtub at the time of the previous time. , among the four combinations by the presence of residual water in the bath, it is one that corrects the T _1, boiling time at the previous time point (T _a) and pouring amount of the previous time point (Q _T) When there is no remaining water in the bathtub , The T ₁ of boiling previous time (T _A)
Bath water heater that corrects the temperature. 3. A preset Wakiagari reservation time (T ₀₎ - a predetermined time (T ₁₎ and a timer device for generating a start signal at the time, to find the presence of residual water in the bathtub of the bathtub water remaining A water level detection device that generates a detection signal corresponding to the presence or absence, a determination circuit that generates an operation command signal by inputting the detection signal and the start signal, a boiling time storage circuit at the previous time, and a An operation control device including a pouring amount storage circuit, wherein the timer device stores the boiling time (T _A ) and pouring amount (Q _T ) when there is no remaining hot water in the bathtub at the time of the previous time. , among the four combinations by the presence of residual water in the bath, it is one that corrects the T _1, boiling time at the previous time point (T _a) and pouring amount of the previous time point (Q _T) When there is residual water in the bathtub Is a bath water heater having a calculating means for correcting the T ₁ time boiling based on the following calculation formula (T _B). Sashimi Where Q ₁ = remaining hot water amount = bath output per minute x (actual measurement time for raising Q ₁ by 1 ° C)